| Entries |
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| 20080204031 | METHOD AND APPARATUS FOR DETERMINING DETERIORATION OF SECONDARY BATTERY, AND POWER SUPPLY SYSTEM THEREWITH - A method for detecting SOC and SOH of a storage battery includes: calculating an SOC value of the storage battery with use of an SOC calculation unit based on a measured voltage value or a measured current value of the storage battery and calculating an SOH value of the storage battery with use of an SOH calculation unit based on the SOC value; further calculating a new SOC value with use of the SOC calculation unit based on the SOH value and calculating a new SOH value with use of the SOH calculation unit based on the new SOC value, these further calculations of SOC value and SOH value being repeated a prescribed n times of at least one so as to obtain an nth calculated SOC value and an nth calculated SOH value; outputting the nth calculated SOH value as an SOH output value and outputting the nth calculated SOH value as an SOC output value; and storing the SOH output value into a memory. | 08-28-2008 |
| 20080224709 | Battery management system and driving method thereof - In a battery management system and a driving method thereof, the system includes a sensor and a micro control unit (MCU). The sensor senses a voltage and a current of a battery, and generates an estimation current of the battery using a result of cumulatively calculating the battery current by a unit of a predetermined period. The MCU receives the battery voltage and the estimation current, sets a voltage of the battery in a key-on state as a first voltage, sets a voltage of the battery after a first period as a second voltage, and calculates an internal resistance of the battery using a difference between the first and second voltages and an average value of the estimation current. | 09-18-2008 |
| 20080258734 | Method for Determining the Internal Resistance of a Battery - A method for determining the internal resistance of a battery, in particular a lead-acid vehicle battery, and an associated device for performing the method are described, in which differential values are calculated from the measured values for the voltage and the current, and these differential values are processed with the aid of a regulator, such as an integrator or a PID regulator. A signal results at the output of the regulator, which corresponds to the reciprocal value of the internal resistance of the battery. This signal is taken into consideration again in each following computing step. The functional capability may be inferred from its internal resistance. | 10-23-2008 |
| 20080284444 | Method for on-line measurement of battery internal resistance, current operational module, and on-line measurement instrument for battery internal resistance - A method and a current operational module for on-line measurement of battery internal resistance and an on-line measurement instrument for battery internal resistance have high measurement accuracy and strong anti-interference ability. The on-line measurement instrument for battery internal resistance comprises a current work module, a voltage measurement module, an analog to digital conversion module, a signal generation module, a centre processing module, an Input/Output module, and a power supply module used for on-line measurement of battery internal resistance. | 11-20-2008 |
| 20080303528 | Method and Device for Measuring Internal Impedance of Stationary Battery - Battery system is widely used in emergent power plant or communication network power plant and its effective management is important. When any one of batteries connected to each other in series is failed during operation of the battery system, since reliability of the system cannot be secured, a problem is arisen to stable operation of the communication network. In a method of separating inferior battery, the battery is operated in floating charge state without separation to generate square current containing charge current and easily generated to flow through the battery cell, voltage signal generated from terminal voltage of the battery by the measuring signal is processed such that only internal impedance voltage signal is separated from harmonics ripple voltage and noise voltage by a synchronized detection calculating algorithm to calculate the internal impedance or effective value thereof (resistance component). When the algorithm is applied after filtering only fundamental frequency and similar component by general filter, measuring precision can be improved and measuring time can be reduced. | 12-11-2008 |
| 20090051364 | Onboard Battery Management Device - A battery management device is provided for accurately measuring in a simple manner the internal resistance (reciprocal of conductance) of a battery that serves as the determination reference of the deterioration level of a battery without the application of an AC voltage to the battery while the battery remains onboard, and determining and displaying the deterioration level of the onboard battery. The onboard battery management device has sensors | 02-26-2009 |
| 20090096459 | METHOD OF MEASURING CHARACTERISTICS REGARDING SAFETY OF BATTERY - A measuring method of a battery includes the step of measuring frequency characteristics of an internal impedance of the battery by an AC impedance method, and determining a parameter of an element representing ease of mobility of charges on a surface of a positive electrode of the battery and that of an element representing the ease of mobility of charges on the surface of a negative electrode. | 04-16-2009 |
| 20090115419 | APPARATUS FOR ESTIMATING CHARGED STATE OF ON-VEHICLE BATTERY - An apparatus is provided to estimate a charged state of a vehicle provided with an internal combustion engine having a crankshaft, a starter that initially rotates the crankshaft when the engine is started, and a battery that powers the starter. The apparatus comprises a detection device and an acquisition device. The detection device detects a voltage of the battery and a discharge current from the battery for a period of time over time instants before and after starting the engine. The acquisition device acquires information indicative of an amount of the discharge current from the battery when the detected voltage of the battery becomes a minimum due to starting the engine. | 05-07-2009 |
| 20090140744 | METHOD AND DEVICE FOR DETERMINING STATE OF HEALTH OF THE BATTERY, AND BATTERY POWER SUPPLY SYSTEM - A method and the device are provided for determining state of health of the battery, in addition to the power supply system using the device, to reduce operational and processing load by expanding the data sampled at the time when the battery is caused to discharge square wave pulses into the square wave is provided. The method includes determining state of health of a battery by causing the battery to discharge square wave pulses with a prescribed cycle at a prescribed current value. Response voltages are sampled at a time of a pulse-discharge. The sampled response voltages are sampled into orthogonal square wave components. An amplitude of the square wave component is divided by the current value of the pulse-discharge to obtain a pseudo-impedance. A state of health of the battery based on the pseudo-impedance is determined. | 06-04-2009 |
| 20090189614 | Fuel Gauging System and Method Thereof - A lighting system is provided that includes at least one lighting device, at least one connector, and a plurality of external power sources. The at least one lighting device includes at least one lighting source, and an internal power source applying a first electrical current to illuminate the at least one lighting element, wherein the internal power source supplies the first electrical current. The at least one connector electrically connects to the at least one lighting device. The plurality of external power sources include at least first and second external power sources that are adapted to be electrically connected to the at least one lighting device by the at least one connector. Further, a fuel gauging system and method detects an electrochemical composition of a power source, which can be at least one of the internal power source and the external power source, and then determines a state of charge of the power source based upon the determined electrochemical composition of the power source. | 07-30-2009 |
| 20090273349 | SYSTEM AND METHOD FOR MONITORING A POWER SOURCE OF AN IMPLANTABLE MEDICAL DEVICE - Techniques for monitoring a battery of an implantable medical device are disclosed. First and second current sources are provided to draw currents having amplitudes of I | 11-05-2009 |
| 20100013490 | FUEL CELL SYSTEM - When the operation point of a DC/DC converter, which steps up/down the output voltage of a fuel cell stack, is in a range of reduction in response capability and further there is issued a request of determining an AC impedance, a controller switches numbers of the drive phases of the DC/DC converter to determine an AC impedance of the fuel cell stack. If the operation point of the DC/DC converter is in the range of reduction in response capability and further the precision of determining the AC impedance is reduced, then the determination of AC impedance in the range of reduction in response capability is inhibited and the switching of the phases of the DC/DC converter is implemented, thereby causing the operation point of the DC/DC converter to be out of the range of reduction in response capability, with the result that the precision of determining the AC impedance can be raised. | 01-21-2010 |
| 20100141262 | Performance Degradation Analyzer and Method of the Same - A method utilizing the resistance of the electrolytic membrane of a fuel cell is known conventionally as a method for detecting abnormality occurring in the fuel cell. As shown on FIG. | 06-10-2010 |
| 20100156425 | METHOD FOR DETERMINING BATTERY INTERNAL RESISTANCE - A method of determining an internal resistance of a energy source that can be modeled as a voltage generator with a series resistance, such as but not limited to a battery or ultracapacitor. The internal resistance may be determined by averaging one or more weighting internal resistance values calculated from a number of sampled current and/or voltage measurement taken from the energy source. | 06-24-2010 |
| 20100194398 | RECHARGEABLE BATTERY ABNORMALITY DETECTION APPARATUS AND RECHARGEABLE BATTERY APPARATUS - The rechargeable battery abnormality detection apparatus is provided with an internal short circuit detection section ( | 08-05-2010 |
| 20100201369 | Coated Motor Vehicle Battery Sensor Element and Method for Producing a Motor Vehicle Battery Sensor Element - The invention relates to a motor vehicle battery sensor element comprising a resistor element | 08-12-2010 |
| 20100264930 | FUEL CELL SYSTEM - There is provided an impedance measuring system which can accurately measure the impedance of a fuel cell. A motor rotation number detection unit successively detects the rotation number of a motor controlled by an inverter and outputs the detection result to a superposition signal generation unit The superposition signal generation unit sets the frequency of an impedance measuring signal to a non-resonant frequency so that the control signal of the motor not resonate with the impedance measuring signal. Thus, by setting the frequency of the impedance measuring signal to the non-resonant frequency, the resonance with the motor is suppressed, which can improve impedance measurement accuracy. | 10-21-2010 |
| 20100295550 | ADAPTIVE ENERGY MANAGEMENT TERMINAL FOR A BATTERY - A battery includes multiple conductive plates and a permeable electrolytic material and an ion membrane located between the conductive plates. The battery also includes at least one wire located within one or more of the permeable electrolytic material and the ion membrane. The at least one wire can be configured to regulate a flow of ions through the ion membrane based on an electrical signal flowing through the at least one wire. The at least one wire could also be configured to generate a magnetic field within the permeable electrolytic material based on another electrical signal flowing through the at least one wire. The battery could further include a temperature sensor wire within the permeable electrolytic material. | 11-25-2010 |
| 20110084702 | BATTERY PACK AND METHOD FOR DETECTING DEGRADATION OF BATTERY - A buttery pack includes: one or two or more secondary batteries; a charge control switch that turns on/off a charging current to the secondary battery; a discharge control switch that turns on/off a discharging current from the secondary battery; a current-detecting element for detecting the charging current and the discharging current; a voltage measuring part that measures the voltage of the secondary battery; a control unit that controls the charge control switch and the discharge control unit; and a storage unit that stores an initial internal resistance of the secondary battery. The control unit measures a closed circuit voltage and a charging current during charging, and a first closed circuit voltage after a first waiting time and a second closed circuit voltage after a second waiting time. The second waiting time is longer than the first waiting time. | 04-14-2011 |
| 20110101986 | DEVICE AND METHOD OF TESTING AN INTERNAL RESISTANCE OF A BATTERY PACK - An internal resistance testing device includes an excitation source and a battery pack, an adjustable resistance R, a sampling unit, and a control unit. The excitation source and the battery pack form a loop circuit. The adjustable resistance R may be located at the loop circuit formed by the excitation source and the battery pack. The sampling unit samples the voltage between two sides of the battery pack, the voltage between two sides of the adjustable resistance R, and the value of the adjustable resistance R. The control unit calculates internal resistance of the battery pack according to the signal value collected by the sampling unit. The internal resistances of different voltage-ranges the battery pack are determined by adjusting the value of the adjustable resistance R to cause the actual excitation voltage to be equal to the range voltage of the sampling unit. The voltage between two sides of the adjustable resistance R is made equal to the range voltage of the sampling unit by adjusting the value of the adjustable resistance R, which effectively improves measurement accuracy of the internal resistance. | 05-05-2011 |
| 20110115490 | Battery Insulation Resistance Measurement Methods, Insulation Resistance Measurement Methods, Insulation Resistance Determination Apparatuses, And Articles Of Manufacture - Battery insulation resistance measurement methods, insulation resistance measurement methods, insulation resistance determination apparatuses, and articles of manufacture are described. According to one aspect, a battery insulation resistance measurement method includes determining a voltage of a battery, determining a voltage of a first terminal of the battery with respect to a ground reference, determining a voltage of a second terminal of the battery with respect to the ground reference, and using the voltages of the battery, the first terminal and the second terminal, determining an insulation resistance of the battery with respect to the ground reference. | 05-19-2011 |
| 20110133744 | INTERNAL RESISTANCE ESTIMATION APPARATUS FOR POWER STORAGE DEVICE, DEGRADATION DETERMINATION APPARATUS FOR POWER STORAGE DEVICE, POWER SUPPLY SYSTEM, AND INTERNAL RESISTANCE ESTIMATION METHOD FOR POWER STORAGE DEVICE - A converter control unit responds to a command from a start determining unit to control a converter such that a ripple current is generated at a secondary battery. A storage unit stores a map defining a correlative relationship between the temperature and current of the secondary battery and internal resistance. An estimating unit estimates a value of internal resistance of the secondary battery based on each detection value of the temperature and current, and the map stored in the storage unit. | 06-09-2011 |
| 20120013340 | BATTERY MODULE - It is intended to provide a battery module having a long life by designing such that deterioration proceeds evenly among battery cells. | 01-19-2012 |
| 20120032681 | DETERMINATION OF THE INTERNAL RESISTANCE OF A BATTERY CELL OF A TRACTION BATTERY WHILE USING RESISTIVE CELL BALANCING - The invention relates to a method and a device for determining the internal resistance of a battery cell of a battery, in particular a traction battery, in which the method can be used either during charging processes or discharging processes and in phases in which the battery including the battery cell does not supply or receive any electrical power, in which resistive cell balancing for balancing the charging states of the battery cells is carried out in the battery, whereby energy is removed from the battery cell via a resistor. According to the invention, a first control module is provided for determining a first voltage applied to the battery cell and a first current flowing from or to the battery cell at a first time during removal or supply of the charge and for determining a second voltage applied to the battery cell and a second current flowing from or to the battery cell at a second time during removal or supply of the charge. Further provided is a calculating unit for calculating the internal resistance of the battery cell on the basis of the quotients of the difference of the second voltage and the first voltage and the difference of the second current and the first current. | 02-09-2012 |
| 20120105070 | SPECTROSCOPIC BATTERY-CELL IMPEDANCE MEASUREMENT ARRANGEMENT - A battery cell measurement system comprising a signal generator coupled to a pulse density modulation circuit generating a control signal which drives a switch connected between a first terminal of a battery cell and a first terminal of a bleeding impedance, a second terminal of the bleeding impedance being coupled to a second battery cell terminal. The first terminal is coupled to a first terminal of a second switch. The second terminal is coupled to a first terminal of a third switch. A second terminal of the second switch and second terminal of the third switch are coupled and are further coupled to a low-pass filter. A signal generated by the low-pass filter is inputted into an analog to digital converter, which provides a signal representative of either a signal across the bleeding impedance, or a signal between the battery cell terminals. | 05-03-2012 |
| 20120146651 | APPARATUS AND METHOD FOR SENSING LEAKAGE CURRENT OF BATTERY - An apparatus for sensing leakage current of a battery includes a current sensing resistance installed on a current detection path of positive and negative terminals of a battery; a DC (Direct Current) voltage applying unit for inducing a potential difference with an opposite polarity to the current detection path through the current sensing resistance; and a leakage current determining unit for sensing a magnitude of current flowing through the current sensing resistance according to the induced potential difference on the current detection path, and determining based on the sensed magnitude of current whether leakage current occurs. | 06-14-2012 |
| 20120182020 | SECONDARY BATTERY TESTER, SECONDARY BATTERY TESTING METHOD, AND MANUFACTURING METHOD OF SECONDARY BATTERY - There is provided a secondary battery tester for testing a state of a secondary battery based on an impedance characteristic of the secondary battery. The tester includes: an impedance acquiring section configured to acquire an impedance value of the secondary battery; and a determining section configured to determine a state of a solid electrolyte interface (SEI) layer of the secondary battery based on the impedance value acquired by the impedance acquiring section. | 07-19-2012 |
| 20120194197 | Fuel Gauging System and Method Thereof - A lighting system is provided that includes at least one lighting device, at least one connector, and a plurality of external power sources. The at least one lighting device includes at least one lighting source, and an internal power source applying a first electrical current to illuminate the at least one lighting element, wherein the internal power source supplies the first electrical current. The at least one connector electrically connects to the at least one lighting device. The plurality of external power sources include at least first and second external power sources that are adapted to be electrically connected to the at least one lighting device by the at least one connector. Further, a fuel gauging system and method detects an electrochemical composition of a power source, which can be at least one of the internal power source and the external power source, and then determines a state of charge of the power source based upon the determined electrochemical composition of the power source. | 08-02-2012 |
| 20120242344 | ABNORMALITY DETECTING SYSTEM FOR BATTERY ASSEMBLY - An abnormality detecting system sequentially compares the output voltages of n-piece battery cells that are connected in series, with a criteria voltage, at respective points in time Tv | 09-27-2012 |
| 20120249152 | CHARGING/DISCHARGING DETERMINATION APPARATUS AND COMPUTER-READABLE NON-TRANSITORY MEDIUM STORING CHARGING/DISCHARGING DETERMINATION PROGRAM - According to one exemplary embodiment, a charging/discharging determination apparatus includes: a receiving module which receives information of a rated capacity of a battery; and a determination module which determines that charging or a discharge of the battery is permitted if an absolute value of a difference between the rated capacity and a measured capacity which is an actual capacity of the battery is within a threshold value. | 10-04-2012 |
| 20120262180 | BATTERY PACK FAILURE DETECTION DEVICE - Each detection unit is configured to compare a voltage output from a battery cell associated therewith a predetermined criterion voltage. A plurality of detection units operate sequentially in response to a start trigger and also sequentially transmit a signal that reflects a result of comparing the voltages to detect whether a battery pack has a low cell voltage fault. A fault monitoring device detects an internal resistance fault when it receives from a transmission circuit a determination signal indicating that the battery pack when electrically discharged has any of its battery cells outputting a voltage decreased to be lower than the criterion voltage and if a current detected has a value smaller in magnitude than a criterion current corresponding to a value of a current obtained by dividing a difference in voltage between an open circuit voltage of the battery cell and the criterion voltage by an upper limit value for internal resistance. | 10-18-2012 |
| 20120280693 | BATTERY CELL IMPEDANCE MEASUREMENT METHOD AND APPARATUS - A circuit arrangement for determining impedance of a battery cell is provided. A first circuit is configured to generate sine and cosine waveforms having N sample values per period. A second circuit is coupled to an output of the first circuit and is configured to input a current into the cell in response to the sample values of the cosine waveform. The current has an amplitude proportional to the sample values of the cosine waveform. A third circuit is coupled to the cell and configured to sample voltage levels across the cell resulting from the current being input into the cell. A fourth circuit is coupled to an output of the third circuit and is configured to separate each voltage level sampled by the third circuit into real and imaginary components. | 11-08-2012 |
| 20120306504 | BATTERY IMPEDANCE DETECTION SYSTEM, APPARATUS AND METHOD - Various aspects of the present disclosure are directed to monitoring battery cells. In accordance with various embodiments, an energy storage cell apparatus includes a current injection circuit that separately inject current into individual ones of a plurality of battery cells that store energy, and an impedance-detection circuit detects an impedance characteristic of each of the plurality of battery cells in response to the injected current. A filter circuit receives impedance data regarding the detected impedance characteristic and separates low-frequency components of the impedance data from high-frequency components of the impedance data. A memory circuit stores data corresponding to high-bandwidth data including both the low-frequency components and the high-frequency components, and an access circuit provides the low-frequency components for the plurality of battery cells to a battery pack controller. The access circuit further accesses and provides the stored high-bandwidth data for a subset of the individual battery cells to the battery pack controller based upon available bandwidth for communicating the high-bandwidth data. | 12-06-2012 |
| 20130027049 | Method for Determining Battery Pack Isolation Resistance Via Dual Bus Monitoring - A method for measuring and calculating the isolation resistance of a battery pack is provided, the method being invulnerable to changes in the bus voltage that may take place between measurements. | 01-31-2013 |
| 20130057292 | FUEL CELL SYSTEM - A fuel cell system includes a fuel cell, a multiphase voltage conversion device with N-phases (N being an integer equal to or larger than two) that is connected to the fuel cell, a control signal generation portion that generates control signals to control each phase of the multiphase voltage conversion device by superimposing a control waveform for measuring impedance on a voltage indicating an output target voltage of the multiphase voltage conversion device and sequentially outputs the control signals corresponding to N phases with a predetermined phase difference to the multiphase voltage conversion device, and an impedance calculation portion that measures a current and a voltage of the fuel cell on cycles corresponding to N predetermined sampling frequencies having a phase difference equal to the predetermined phase difference and calculates an impedance of the fuel cell based on the measured current and the measured voltage. | 03-07-2013 |
| 20130069660 | METHOD FOR IN SITU BATTERY DIAGNOSTIC BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY - The invention is a method for estimating the internal state of a system for the electrochemical storage of electrical energy, such as a battery. For various internal states of batteries of the same type as a battery being analysed, impedance measurements are carried out by adding an electrical signal to the current passing through the batteries. Then, an RC circuit is used to model the impedances. Next, a relationship is calibrated between the SoC (and/or the SoH) and the parameters of the RC circuit using multivariate statistical analysis. A measurement of the impedance of the battery under analysis is carried out which is modeled using the RC circuit. Finally, the relationship of the equivalent electric circuit defined for the battery being analysed is used to estimate the internal state of that battery. | 03-21-2013 |
| 20130106427 | Battery Rating Method | 05-02-2013 |
| 20130141109 | Battery Health Monitoring System and Method - A method and system for monitoring the health of a battery is provided. A precision frequency can be determined for the battery by applying one of an AC current or voltage perturbation across a frequency sweep with impedance spectroscopy equipment to obtain an impedance response; collecting data related to the impedance response at a plurality of various states of charge within a recommended voltage window of the battery; plotting the collected data on one or more impedance curves; and analyzing the one or more impedance curves at the various states of charge to determine the precision frequency. Next, one of an AC current or voltage perturbation can be applied at the precision frequency resulting in an impedance response. The value of the impedance response can be recorded, and a determination can be made of a battery classification zone that the impedance value falls within. | 06-06-2013 |
| 20130187658 | Testing Methods And Pass/Fail Criteria For Electric Joints - In one embodiment, a method of evaluating a battery module includes: applying a tension load to a test coupon, the test coupon including a segment of a battery terminal connected to a segment of an interconnector busbar; and measuring electrical resistance across the segments of the test coupon. In certain instances, the method further includes applying a different, second tension load to the segments of the test coupon and repeating the measuring of electrical resistance. In certain other instances, the method further includes forming a plot between various values of electrical resistance as a function of various tension loads. | 07-25-2013 |
| 20130200902 | DIAGNOSIS APPARATUS FOR ELECTRIC STORAGE APPARATUS, AND ELECTRIC STORAGE APPARATUS - A diagnosis apparatus performing a diagnosis for reuse of an electric storage apparatus including a plurality of electric storage elements connected electrically in series includes a voltage sensor detecting a voltage of each of a plurality of blocks, the plurality of electric storage elements being divided into the blocks; a current sensor detecting a current in the electric storage apparatus; and a controller calculating an internal resistance of each of the blocks based on outputs from the voltage sensor and the current sensor. The controller specifies the highest of the internal resistances of the plurality of blocks as a criterion to perform the diagnosis for the reuse of the electric storage apparatus. | 08-08-2013 |
| 20130214787 | AMBULATORY INFUSION DEVICE WITH ADVANCED BATTERY TESTING AND METHOD FOR TESTING A BATTERY - Included are embodiments of an ambulatory infusion device. Some embodiments include a battery receiving portion that receives a user-replaceable battery of variable individual characteristics. The user-replaceable battery may serve as a primary power source of the ambulatory infusion device and being successively depleted during application. Similarly, some embodiments include a dosing unit with an electrically powered actuator and an electronic controller that controls operation of the ambulatory infusion device. Still some embodiments include a testing unit that is operatively coupled to the electronic controller, the testing unit being designed to carry out a battery test, the battery test including determining an off-circuit voltage and an internal resistance of the user-replaceable battery. Still some embodiments include an alerting unit that is operatively coupled to the testing unit and/or the electronic controller to provide an alert to a device user in dependence of a battery test result. | 08-22-2013 |
| 20130214788 | Battery Insulation Resistance Measurement Methods, Insulation Resistance Measurement Methods, Insulation Resistance Determination Apparatuses, And Articles Of Manufacture - Battery insulation resistance measurement methods, insulation resistance measurement methods, insulation resistance determination apparatuses, and articles of manufacture are described. According to one aspect, a battery insulation resistance measurement method includes determining a voltage of a battery, determining a voltage of a first terminal of the battery with respect to a ground reference, determining a voltage of a second terminal of the battery with respect to the ground reference, and using the voltages of the battery, the first terminal and the second terminal, determining an insulation resistance of the battery with respect to the ground reference. | 08-22-2013 |
| 20130249562 | INTERNAL RESISTANCE MEASUREMENT DEVICE AND METHOD FOR STACKED BATTERY - An internal resistance measurement device for stacked battery includes an AC power supply part for outputting an AC current to an measurement-object, which includes at least a stacked battery made of a plurality of stacked power generating elements, by being connected to the measurement-object, an AC adjusting part for adjusting an AC current so that a positive-electrode AC potential difference, which is a potential difference obtained by subtracting potential in a middle portion from potential in a portion connected to a load device on the positive side of the measurement-object, matches a negative-electrode AC potential difference, which is a potential difference obtained by subtracting potential in the middle portion from potential in a portion connected to the load device on the negative side of the measurement-object, and a resistance calculating part for calculating resistance of the battery based on the adjusted AC current and the AC potential difference. | 09-26-2013 |
| 20130314094 | BATTERY MANAGEMENT SYSTEM WITH DISTRIBUTED WIRELESS SENSORS - A system for monitoring parameters of an energy storage system having a multiplicity of individual energy storage cells. A radio frequency identification and sensor unit is connected to each of the individual energy storage cells. The radio frequency identification and sensor unit operates to sense the parameter of each individual energy storage cell and provides radio frequency transmission of the parameters of each individual energy storage cell. A management system monitors the radio frequency transmissions from the radio frequency identification and sensor units for monitoring the parameters of the energy storage system. | 11-28-2013 |
| 20140009164 | DEGRADATION MEASUREMENT DEVICE, SECONDARY BATTERY PACK, DEGRADATION MEASUREMENT METHOD, AND PROGRAM - A battery sensing section measures a voltage across a secondary battery. A current sensing section measures a current flowing through the secondary battery. A control section holds the value of an external impedance present in a discharge path outside the secondary battery, discharges the secondary battery from a first time to a second time at which an integrated discharge capacity based on a measured discharge current becomes equal to a predetermined discharge capacity reference value, calculates the internal impedance present in the secondary battery at the second time based on the measured voltage, calculates the second open voltage at the second time by multiplying the sum of the external impedance and the internal impedance by the measured discharge current, and calculates the recovered capacity of the secondary battery based on the first open voltage at the first time, the second open voltage and the discharge capacity reference value. | 01-09-2014 |
| 20140015534 | BATTERY SYSTEM CONTROLLER - A battery system controller is provided which is used for a battery system including a generator, electrical loads, a lead storage battery, a high performance storage battery which has higher-power and higher-energy density, and an opening and closing switch which switches the generator and the lead storage battery, and the high performance storage battery to an electrically conducting state or an interrupted state, a terminal voltage of the high performance storage battery being controlled so as to be lower than a terminal voltage of the lead storage battery. The battery system controller includes a control unit which allows the opening and closing switch to switch from an electrically conducting state to an interrupted state on the condition that charging current flowing to the high performance storage battery is smaller than a determination value, the larger an internal resistance of the lead storage battery, the smaller the determination value is set. | 01-16-2014 |
| 20140021959 | Method and Circuitry to Adaptively Charge a Battery/Cell Using the State of Health Thereof - The present inventions, in one aspect, are directed to techniques and/or circuitry to determining data which is representative of the state of health, or a change therein, of the battery using the data which is representative of (i) the relaxation time of the battery and/or (ii) the overpotential of the battery. In another aspect the present inventions are directed to techniques and/or circuitry to adapt one or more characteristics of a charge signal using data which is representative of the state of health, or a change therein, of the battery. In yet another aspect the present inventions are directed to techniques and/or circuitry to determine a state of charge of the battery using data which is representative of the state of health, or a change therein, of the battery. | 01-23-2014 |
| 20140077817 | METHOD FOR THE CONTROL AND HANDLING OF ELECTROCHEMICAL CELLS OR BATTERIES, ELECTROCHEMICAL CELL AND BATTERY - The invention relates to a method for handling and servicing an electrochemical cell ( | 03-20-2014 |
| 20140084933 | ISOLATION RESISTANCE MEASURING APPARATUS HAVING FAULT SELF-DIAGNOSING FUNCTION AND SELF-DIAGNOSING METHOD USING THE SAME - Disclosed is an isolation resistance measuring apparatus having a fault self-diagnosing function. The isolation resistance measuring apparatus having a fault self-diagnosing function forms a diagnosis circuit by means of a first isolation resistance measuring unit and a second isolation resistance measuring unit respectively connected to a cathode terminal and an anode terminal of a battery, and includes a control unit for determining whether a fault arises at the isolation resistance measuring apparatus by using a circuit equation derived from the diagnosis circuit and first and second diagnosis voltages. Therefore, the isolation resistance measuring apparatus may diagnose whether a fault arises at a device which measures isolation resistance of a battery. | 03-27-2014 |
| 20140125348 | SYSTEM AND METHOD FOR ESTIMATING THE END-OF-CHARGE TIME OF A BATTERY - The invention relates to a system for estimating the end-of-charge time of a battery connected to a battery charger on board a motor vehicle. The system is characterised in that it comprises a means ( | 05-08-2014 |
| 20140152315 | TRANSIENT DETECTION OF AN EXCEPTIONAL CHARGE EVENT IN A SERIES CONNECTED BATTERY ELEMENT - A system and method for identifying and responding to exceptional charge events of series-connected energy storage elements. | 06-05-2014 |
| 20140152316 | Pairing Method Based on Electric Current Synchronicity for Augmented Batteries - A plurality of augmented batteries each have internal communication circuitry and current monitoring circuitry allowing them to communicate current usage signatures with one another. Based on analysis of those respective signatures each augmented battery determines if it is “paired” with other batteries, by virtue of being installed in the same device. The augmented batteries use knowledge of pairing to control how they collectively behave to provide augmented functionality, such as alerting the user regarding the charge level within the batteries. | 06-05-2014 |
| 20140159738 | METHOD AND APPARATUS FOR DIAGNOSING FAULT WITHIN FUEL CELL STACK - To diagnose a fault of a fuel cell stack, an alternating current having a first optimal frequency of a first frequency domain to diagnose a drop in cell voltage and an alternating current having a second optimal frequency of a second frequency domain to diagnose a cause of the drop in cell voltage are supplied to the fuel cell stack are provided. A distortion rate is then calculated based on voltage of the fuel cell stack according to the alternating current of the first optimal frequency, and the drop in cell voltage is diagnosed based on the calculated distortion rate. Also, impedance is calculated based on voltage and a current of the fuel cell stack according to the alternating current of the second optimal frequency and amount of water is calculated based on the calculated in the fuel cell stack, and the cause of the drop in cell voltage is diagnosed based on the calculated impedance and amount of water. | 06-12-2014 |
| 20140167775 | SYSTEMS AND METHODS FOR MEASURING HIGH FREQUENCY RESISTANCE IN A FUEL CELL SYSTEM - System and methods for measuring operating parameters of a fuel cell system are presented. In certain embodiments, the systems and methods may be configured to measure a high frequency resistance of a fuel cell system. A method for measuring a high frequency resistance of a fuel cell system may include inducing a current signal and a voltage signal through the FC system at a center frequency using a switched load. The current signal and the voltage signal may then be measured and filtered to isolate the current signal and the voltage signal from noise signals occurring in the FC system. A high frequency resistance of the FC may then be calculated based on the filtered current and voltage signals. | 06-19-2014 |
| 20140191764 | METHOD FOR DETERMINING RESPONSE CHARACTERISTICS OF BATTERY - A method for determining response characteristics of a battery includes: pressurizing the battery in a direction to reduce a distance between electrode surfaces of the battery; and applying a voltage or a current to the pressurized battery to determine response characteristics of the battery. | 07-10-2014 |
| 20140218042 | BATTERY STATE DETECTION DEVICE - This device and method use the complex impedance of a rechargeable battery to detect the state of the rechargeable battery. A computer determines the slope of the complex impedance at least two different frequencies in a diffusion region of the rechargeable battery when a straight-line approximation has been made, and compares the slope with a threshold value. If the slope is greater than or equal to the threshold value, the computer determines that the battery has a normal capacity balance, and if the slope is less than the threshold value, the computer determines that the battery has an abnormal unbalanced capacity. Furthermore, if the magnitude of an imaginary axis component of the complex impedance in the diffusion region of the rechargeable battery is greater than the threshold battery, the computer determines that the battery has an abnormal capacity balance, and if said magnitude is less than or equal to the threshold value, the computer determines that the battery has a normal capacity balance. | 08-07-2014 |
| 20140266228 | ACTIVE MEASUREMENT OF BATTERY EQUIVALENT SERIES RESISTANCE - A circuit for measuring the equivalent series resistance (ESR) of a battery includes taking measurements of battery current and battery voltage. A controller may control the taking of the measurements. A load generator may be activated to produce a current pulse to the battery to provide an explicit current transient under certain operating conditions of the battery. | 09-18-2014 |
| 20140306712 | TRACKING AGING EFFECT ON BATTERY IMPEDANCE AND TRACKING BATTERY STATE OF HEALTH - Methods and systems for tracking aging effect on battery impedance are provided. A first voltage associated with a first state of a battery, a second voltage associated with a second state of the battery, and an impedance of the battery are determined. A battery impedance table that is used for calculating a state of charge of the battery is updated using the determined impedance. Methods and systems for tracking state of health of a battery are also provided. Partial charge cycles of a received battery are counted between a first charge event and a second charge event of the battery. State of health data of the batter is tracked, and a new state of health estimation is calculated based on the state of health data if the counted partial charge cycles of the battery has a count value that has a predetermined relationship with a predetermined count threshold. | 10-16-2014 |
| 20140333317 | BATTERY STATE ESTIMATOR COMBINING ELECTROCHEMICAL SOLID-STATE CONCENTRATION MODEL WITH EMPIRICAL EQUIVALENT-CIRCUIT MODEL - A battery state estimator which combines an electrochemical solid-state concentration model with an empirical equivalent-circuit model. The battery state estimator uses a reduced-order physics-based electrochemical solid-state concentration model to calculate open circuit voltage of a battery cell, and uses the calculated open circuit voltage in an equivalent-circuit model to evaluate a diffusion voltage drop and other battery cell parameters. The battery state estimator is implemented in an online estimator framework using an extended Kalman filter, with a measured terminal voltage and measured current as inputs. A state of charge of the battery cell can be determined from the calculated open circuit voltage, and the state of charge along with the other parameters from the equivalent-circuit model are used to evaluate battery pack performance and to control battery pack charging and discharging. | 11-13-2014 |
| 20140340092 | MONITORING APPARATUS AND METHOD OF BATTERY CONTACT POINT IN CHARGE/DISCHARGE SYSTEM WITH BATTERIES CONNECTED IN SERIES - A monitoring apparatus and method of a battery contact point that autonomously measures contact resistances of a contact terminal for directly connecting a battery for charging/discharging and a circuit in a charge/discharge apparatus for charging/discharging a single secondary battery or a plurality of secondary batteries in series. | 11-20-2014 |
| 20140347059 | SECONDARY BATTERY STATE DETECTION DEVICE AND SECONDARY BATTERY STATE DETECTION METHOD - To accurately determine whether an engine can be started while accurately detecting a degree of deterioration of a secondary battery, in a secondary battery state detecting device detecting a state of a secondary battery mounted on a vehicle, a measurement unit measures a value of an internal resistance of the secondary battery at an engine stop time. An estimation unit estimates a value of a diffusion resistance resulting from diffusion of an ion generated at an electrolytic solution of the secondary battery by supplying electric power to a starter motor at a starting time of the engine. A calculation unit calculates a starting voltage being a voltage for the starting of the engine from a resistance value obtained by adding the value of the diffusion resistance estimated by the estimation unit to the value of the internal resistance measured by the measurement unit. | 11-27-2014 |
| 20150022214 | MONITORING SYSTEM - A monitoring system having a monitoring unit and a circuit element that are integrated in an enclosure for protecting connections between the monitoring unit and the circuit element. The monitoring unit monitors the circuit element via a first electrical quantity, and the monitoring unit has a control unit and a first circuit unit and a second circuit unit. The first current is essentially or precisely equal in amplitude to the first current, and the first current and the second current flow simultaneously in the two line sections. The first current direction is opposite to the second current direction, and the first circuit unit ascertains a first voltage drop at the first line section, and the second circuit unit ascertains a second voltage drop at the second line section. The control unit ascertains the first electrical quantity from the first voltage drop and the second voltage drop. | 01-22-2015 |
| 20150042350 | SYSTEM AND METHOD FOR DETERMINING ISOLATION RESISTANCES OF A BATTERY PACK - A system for determining isolation resistances of a battery pack includes a voltage source, a voltage meter, and a microprocessor. The voltage source is disposed external of the battery pack. The voltage source applies an output voltage on first and second electrical terminals. The voltage meter measures a first voltage level between the first electrical terminal and the housing, and a second voltage level between the first electrical terminal and the housing when a resistor is electrically coupled between the first electrical terminal and the housing. The voltage meter measures a third voltage level between the second electrical terminal and the housing, and a fourth voltage level between the second electrical terminal and the housing when the resistor is electrically coupled between the second electrical terminal and the housing. The microprocessor determines a first isolation resistance value based on the first, second, and third voltage levels. | 02-12-2015 |
| 20150048838 | APPARATUS AND METHOD FOR INSPECTING ALL-SOLID BATTERY - An object of the present invention is to provide an apparatus for inspecting an all-solid battery with which a battery capacity where a voltage abnormality occurs can be grasped before the voltage abnormality occurs. The present invention is an apparatus for inspecting an all-solid battery including a storage section storing a relationship between the battery capacity where the voltage abnormality occurs and a resistance of the all-solid battery, and a resistance calculation section calculating the resistance based on a current and voltage in charging the all-solid battery, wherein the battery capacity where the voltage abnormality occurs in the all-solid battery is calculated from the relationship stored in the storage section and the resistance calculated in the resistance calculation section. | 02-19-2015 |
| 20150070024 | BATTERY PACK, APPARATUS INCLUDING BATTERY PACK, AND METHOD OF MANAGING BATTERY PACK - A battery pack including a battery coupled to a load and a charging device, and comprising at least one battery cell, and a battery management unit for controlling charging of the battery from the charging device and discharging of the battery to the load, wherein the battery management unit includes a measuring unit for generating cell voltage data and current data by measuring a cell voltage and a current of the at least one battery cell, a capacity estimating unit for generating current capacity data based on the cell voltage data and the current data, an internal resistance estimating unit for generating current internal resistance data based on the cell voltage data and the current data, and a state of health (SOH) estimating unit for estimating an SOH of the at least one battery cell based on the current capacity data and the current internal resistance data. | 03-12-2015 |
| 20150108991 | BATTERY CONTROL DEVICE - A battery control device calculates at least one of an allowable current and an allowable power during charge/discharge of a battery from a no-load voltage and an internal resistance of the battery, and corrects at least one of the no-load voltage and the internal resistance according to the states of charge/discharge of the battery. | 04-23-2015 |
| 20150137823 | POWER STORAGE MEMBER MONITORING DEVICE, POWER STORAGE APPARATUS, AND POWER STORAGE MEMBER MONITORING METHOD - A power storage member monitoring device of the present disclosure includes a circuit that designates a monitor target power storage member based on results of voltage measurement carried out more than once on each of series-connected power storage blocks, each of the power storage blocks including at least one power storage member. | 05-21-2015 |
| 20150145520 | CIRCUIT AND METHOD FOR EVALUATING CELLS IN A BATTERY - In various embodiments, a method for evaluating a cell of a battery is provided. The method may include: balancing a voltage of at least one cell of the battery using charge pulses, wherein the charge pulses are modulated with an oscillating test signal; measuring a current flow through the cell and measuring a voltage across the cell; demodulating the measured current and the measured voltage; and determining an impedance based on the demodulated current and the demodulated voltage. | 05-28-2015 |
| 20150145521 | METHOD OF SELECTING USED SECONDARY BATTERY AND METHOD OF MANUFACTURING BATTERY PACK - A method of selecting a used secondary battery includes an internal resistance measurement step of measuring a specific internal resistance (second internal resistance) at a specific battery temperature (second battery temperature) of each of used secondary batteries, and a selection step of selecting a used secondary battery or batteries having the specific internal resistance (second internal resistance) smaller than a preset threshold from the plurality of used secondary batteries whose specific internal resistances (second internal resistance) have been measured in order to exclude an electrode-deteriorated battery from the used secondary batteries. | 05-28-2015 |
| 20150301121 | METHOD AND APPARATUS FOR ESTIMATING BATTERY LIFE DURING DRIVING OF ELECTRICAL VEHICLE (EV) - An apparatus for estimating a battery life includes a battery monitor configured to monitor an output signal from a battery; a steady state detector configured to detect a first steady state in which the output signal stays in a steady state and a second steady state differing from the first steady state; and an estimator configured to estimate a battery life from a variation of the output signal in a transient state in which the output signal transitions from the first steady state to the second steady state. | 10-22-2015 |
| 20150303532 | Battery System and Associated Method for Determining the Internal Resistance of Battery Cells or Battery Modules of Said Battery System - A method for determining the internal resistance of battery cells of battery modules of a battery includes measuring a first voltage of at least one battery cell of a first battery module at a first time. The first battery module is decoupled from the battery module string in response to a control signal. The first battery module is connected to the battery module string after the first voltage measurement to enable a change in the first voltage of the at least one battery cell in response to a current flowing through the first battery module. A second voltage is measured at a second time where the first battery module is connected to the battery module string for a predefined time interval. The internal resistance is determined with reference to a difference between the first and the second voltage and the current flowing through the first battery module. | 10-22-2015 |
| 20150309122 | BATTERY STATE ESTIMATION METHOD - The invention relates to a method, The method comprises measuring a first battery voltage of a battery of a device at and a first charging current after terminating a constant current charging mode and before initiating a constant voltage charging mode, producing a charging impulse on the battery, measuring a second battery voltage and a second charging current, and determining an impedance of the battery on the basis of a voltage difference between the first and the second battery voltage and a difference between the first and the second charging current. The invention further relates to an apparatus and a computer program product that perform the method. | 10-29-2015 |
| 20150369870 | APPARATUS AND METHOD FOR ESTIMATING POWER STORAGE DEVICE DEGRADATION - Switches change the resistance value of a charge/discharge circuit in a period from starting a discharging at an upper limit voltage until the voltage reaches a lower limit voltage. An electric charge estimator computes electric charge by time-integrating current from a start of the discharging to an arbitrarily determined time, and computes a relationship between electric charge and voltage of a power storage device. An internal resistance estimator computes internal resistance based on voltages and currents of the storage device at times when resistance values are different. An electric energy estimator computes a relationship between electric charge and open voltage based on electric charge, voltage, current and internal resistance of the storage device. During charging or discharging of the storage device, the electric energy estimator estimates the electric energy of the power storage device based on the electric charge, the open voltage, the internal resistance, and the charge/discharge current. | 12-24-2015 |
| 20160011275 | STORAGE BATTERY STATE DETECTION APPARATUS AND STORAGE BATTERY STATE DETECTION METHOD | 01-14-2016 |
| 20160054391 | METHOD, DEVICE AND SYSTEM FOR MEASURING IMPEDANCE OF FUEL CELL - Disclosed are a method, a device and a system for measuring impedance of a fuel cell. For example, the method includes: injecting, by an impedance measurement device, a current of an associated wave to the fuel cell; receiving, by the impedance measurement device, a voltage in response to the current of the associated wave from the fuel cell; and measuring, by the impedance measurement device, impedance of the fuel cell using the current of the associated wave and the response voltage. In particular, the associated wave used in the method, the device and the system is a nonsinusoidal periodic wave. | 02-25-2016 |
| 20160061907 | BATTERY STATE DETERMINATION DEVICE - A battery state determination device, which determines a micro-short-circuiting tendency state, includes an impedance meter that applies an AC voltage or an AC current of a measurement frequency to a rechargeable battery, which is subject to determination, and measures complex impedance. The device further includes a detector that detects an absolute value of an imaginary axis component of the complex impedance. The device further includes a determiner that compares the absolute value of the imaginary axis component detected by the detector with a lower limit threshold value. The lower limit threshold value is set based on a measurement result of the absolute value of the imaginary axis component of the rechargeable battery in the micro-short-circuiting tendency state. When the absolute value of the imaginary axis component is smaller than the lower limit threshold value, the determiner determines that the rechargeable battery is in the micro-short-circuiting tendency state. | 03-03-2016 |
| 20160069963 | ELECTRICITY STORAGE DEVICE STATE INFERENCE METHOD - The internal impedance |Z| of an electricity storage device is measured at a frequency at which the internal impedance of the electricity storage device does not change with temperature, and the SOC or SOH of the electricity storage device is inferred on the basis of the measured value. Furthermore, the real part R of the internal impedance of the electricity storage device is measured at a frequency at which the real part R of the internal impedance of the electricity storage device does not change with temperature, and the SOC or SOH of the electricity storage device is inferred on the basis of the measured value. | 03-10-2016 |
| 20160084914 | System and Method for a Battery and Test Circuit - According to an embodiment, a system includes a switching regulator and an electrochemical storage test circuit. The switching regulator is coupled to a power supply input and configured to supply a regulated voltage to a regulated supply terminal that is configured to be coupled to a device. The electrochemical storage test circuit is configured to be coupled to an electrochemical storage unit. The electrochemical storage test circuit includes a bidirectional switch with a first switch terminal coupled to the regulated supply terminal, a second switch terminal configured to be coupled to the electrochemical storage unit, and a switch control terminal. The electrochemical storage test circuit also includes a built-in self-test (BIST) circuit configured to be coupled to the electrochemical storage unit and to the switch control terminal. | 03-24-2016 |
| 20160084915 | APPARATUS AND METHOD FOR MEASURING IMPEDANCE OF FUEL CELL STACK - An apparatus and method for measuring impedance of a fuel cell stack capable of accurately measuring the impedance even when a DC current of the fuel cell stack is changed depending on fluctuation of a load, by compensating for an AC voltage (or AC current) used to measure the impedance of the fuel cell stack based on a DC current of the fuel cell stack. | 03-24-2016 |
| 20160091573 | BATTERY DETERIORATION DETERMINATION DEVICE, BATTERY DETERIORATION DETERMINATION METHOD, AND VEHICLE - A battery deterioration determination device includes a temperature sensor that detects a temperature of a battery; and a determination unit that determines whether the battery has deteriorated or not, wherein the determination unit executes a different deterioration determination process between a first case where the temperature detected by the temperature sensor is less than a predetermined temperature and a second case where the temperature detected by the temperature sensor is equal to or higher than a predetermined temperature. | 03-31-2016 |
| 20160097819 | Battery Control Device - A battery monitoring device includes: a current detection unit that detects an electric current flowing through a battery; a voltage detection unit that detects a voltage between both ends of the battery; a temperature detection unit that detects the temperature of the battery; an internal resistance increase rate calculation unit that calculates the internal resistance increase rate of the battery based on the detected electric current, voltage between the both ends, and temperature; and a calculation invalid time setting unit that sets a predetermined calculation invalid time according to the characteristics of the internal resistance increase rate. The calculation results of the internal resistance increase rate is invalidated for an invalid period from the start of charging or discharging of the battery to the lapse of the calculation invalid time. | 04-07-2016 |
| 20160103186 | INTEGRATED DC/DC CONVERTER, ELECTROCHEMICAL ENERGY STORAGE SYSTEM, AND METHODS FOR ANALYZING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY AND WORKING STATE OF ELECTROCHEMICAL ENERGY STORAGE APPARATUS - An integrated DC/DC converter includes a first DC/DC converter, a second DC/DC converter, a first voltage sensor, a second voltage sensor, a first current sensor, a second current sensor, a third current sensor, and a controller. The first DC/DC converter has an input end and an output end. The input end of the first DC/DC converter is to be electrically connected to an output end of an electrochemical energy storage apparatus. The output end of the first DC/DC converter is to be electrically connected to an input end of an electrical load. The second DC/DC converter connects the first DC/DC converter in parallel. | 04-14-2016 |
| 20160109523 | APPARATUS AND METHOD FOR CALCULATING STATE OF CHARGE - An apparatus for calculating State of Charge (SOC) of a secondary battery by correcting a terminal voltage includes: a voltage measuring device that measures a terminal voltage of a battery; a voltage corrector that corrects the terminal voltage using a predetermined factor obtained from a characteristic of the battery; and a SOC calculator that calculates SOC of the battery based on the corrected terminal voltage. A method for calculating SOC includes steps of: measuring the terminal voltage of a battery; correcting the terminal voltage using the predetermined factor obtained from the characteristic of the battery; and calculating SOC of the battery based on the corrected terminal voltage. | 04-21-2016 |
| 20160109528 | METHOD AND APPARATUS FOR DETERMINING AN OPERATING POINT-DEPENDENT CHANGE IN RESISTANCE FACTOR AND VEHICLE - An apparatus and a method for determining an operating point-dependent change in resistance factor (AF | 04-21-2016 |
| 20160111758 | MONITORING DEVICE FOR A BATTERY, A LITHIUM-ION BATTERY, AND METHOD FOR THE MONITORING OF A BATTERY - A monitoring device for a battery, a lithium-ion battery with the monitoring device and a method for the monitoring of a battery, wherein the battery is provided with a plurality of cell composites comprising a number of mutually parallel-interconnected battery cells. The cell composites are also interconnected by means of electrical cell couplers, and one or more temperature sensors are arranged between the cell composites. Where a voltage drop across one or more of the battery cells on the electrical cell couplers exceeds a predetermined value and, simultaneously, a temperature occurs on at least one of the temperature sensors which exceeds a predetermined value, a fault signal is generated. The defective battery cell can then be isolated from the cell composite. | 04-21-2016 |
| 20160116546 | SYSTEM AND METHOD FOR MEASURING INTERNAL RESISTANCE OF BATTERY - A system and method for more accurately measuring an internal resistance of a battery for a vehicle are provided. The method includes measuring, by a controller, current-voltage pairs for the battery and calculating a correlation between current and voltage in the measured current-voltage pairs. In addition, the internal resistance of the battery is measured using the current-voltage pairs having the correlation equal to or greater than a preset threshold. | 04-28-2016 |
| 20160131719 | BATTERY STATE DETECTION DEVICE - A battery state detection device enabling a state of a secondary battery to be detected relatively easily and accurately is provided. In a battery state detection device, a μCOM detects a plurality of internal complex impedances corresponding to a plurality of discrete detection frequencies in a secondary battery, and detects an SOH of the secondary battery based on the plurality of detected internal complex impedances. The plurality of frequencies corresponding to the plurality of internal complex impedances detected by the μCOM are allocated to two partial frequency ranges respectively corresponding to a plurality of partial graphs showing states of a plurality of components of the secondary battery in a graph in which the internal complex impedances of the secondary battery in a predetermined frequency range are plotted on a complex plane. | 05-12-2016 |
| 20160169979 | APPARATUS AND METHOD FOR MEASURING IMPEDANCE FOR FUEL CELL DIAGNOSIS | 06-16-2016 |
| 20160195585 | SYSTEMS AND METHODS FOR DETERMINING A REMAINING BATTERY CAPACITY OF A BATTERY DEVICE | 07-07-2016 |
| 20160195588 | DETERIORATION STATE DETECTION APPARATUS AND DETERIORATION STATE DETECTION METHOD FOR ENERGY STORAGE DEVICE, AND ENERGY STORAGE SYSTEM | 07-07-2016 |
| 20160202326 | APPARATUS AND METHOD FOR MEASURING IMPEDANCE OF LAMINATED BATTERY | 07-14-2016 |
| 20170234935 | Circuit Arrangement and Method for Determining the Impedance of a Test Battery | 08-17-2017 |
| 20190146038 | INTERNAL STATE ESTIMATING DEVICE | 05-16-2019 |
| 20190146039 | Method for Determining the Internal Resistance of Battery Cells, Battery Module, and Device | 05-16-2019 |
| 20190146040 | ELECTRIC LEAKAGE DETECTION APPARATUS AND ELECTRIC LEAKAGE DETECTION METHOD | 05-16-2019 |
| 20220137144 | HIGH-PRECISION IMPEDANCE MEASUREMENT DEVICE - An impedance measurement device of the present disclosure includes: an electrochemical energy device; an amplifier connected to each connection terminal of the electrochemical energy device and configured to amplify a signal introduced into a wiring; and a main board configured to receive the signal from the amplifier and measure an impedance. Accordingly, the present invention has advantages in that high resistance to electromagnetic interference may be achieved by disposing a preamplifier close to a terminal of an electrochemical energy device to amplify only the signal without amplifying a noise introduced into a wiring. | 05-05-2022 |
