Patent application number | Description | Published |
20100060256 | VOLTAGE DETECTION APPARATUS - A voltage detection apparatus includes: a battery including a plurality of unit cells mutually connected in series; a plurality of blocks, each block including at least one of the plurality of unit cells; a plurality of voltage detectors, each detector connected to respective one of the blocks, and detecting a voltage between both ends of the unit cell in the one of the blocks; a plurality of reference power sources, each source connected to respective one of the voltage detectors, and at least one of the reference power sources having higher accuracy than the other reference power sources; and a correcting unit which corrects a detection result of the voltage detector which is connected to the other reference power source on the basis of a detection result of the voltage detector which is connected to the reference power source with the higher accuracy. | 03-11-2010 |
20100060295 | VOLTAGE DETECTION APPARATUS - A voltage detection apparatus includes: a battery including unit cells mutually connected in series; a first block including at least one of the unit cells; a second block including at least one of the unit cells, and provided adjacent to the first block; a first voltage detector connected to the first block, which detects a voltage between both ends of the unit cell in the first block, and which includes: a current source; a current detection element connected to the current source; and a voltage measuring unit which detects a voltage between both ends of the current detection element; and a second voltage detector connected to the second block, which has a similar construction with the first voltage detector. An abnormality detector of the voltage detection apparatus detects an abnormality of the voltage detectors in accordance with the voltages between both ends of the current detection elements. | 03-11-2010 |
20100225327 | VOLTAGE MEASURING APPARATUS OF ASSEMBLED BATTERY - A voltage measuring apparatus for measuring an output voltage of an assembled battery in which a plurality of unit cells are connected in series and are divided into a plurality of blocks is provided. The voltage measuring apparatus includes: a block voltage detection unit which detects a voltage of at least one of the plurality of blocks; a sampling voltage generation unit which is provided in the block voltage detection unit and generates an analog sampling voltage applied in the sampling voltage generation unit; an A/D conversion unit which is provided in the block voltage detection unit and digitizes the analog sampling voltage to output a digital sampling voltage; and a voltage variation detection unit which obtains an error ratio of the voltage detected by the block voltage detection unit based on the digital sampling voltage. | 09-09-2010 |
20100301868 | VOLTAGE MONITORING APPARATUS - A voltage monitoring apparatus includes a plurality of voltage monitoring sections corresponding to a plurality of blocks of unit cells of a multiple-set battery respectively and a main control section. Each of the voltage monitoring section includes a voltage detection section which detects voltages of the unit cells of a corresponding block, a voltage adjustment section which adjusts the voltages of the unit cells of the corresponding block so that the voltages are uniformized, an active power source which obtains power from the unit cells of the corresponding block, and supplies power to the voltage detection section and the voltage adjustment section, a power source switching section which switches a power supply mode and a power disconnect mode of the active power source, and a low consumption power source which obtains the power from the unit cells of the corresponding block, and supplies power to the power source switching section. The main control section includes a failure diagnosis section which performs a failure diagnosis of each of the voltage monitoring sections, and a switching control section which controls to disconnect a supply of the power from the active power source when a result of the failure diagnosis indicates a failure. | 12-02-2010 |
20100308835 | VOLTAGE MONITORING DEVICE FOR ASSEMBLED BATTERY - There is provided a voltage monitoring apparatus for monitoring an output voltage of an assembled battery. The voltage monitoring apparatus comprises: voltage monitoring sections, each section monitoring a voltage of each block of the plurality of blocks into which the plurality of unit cells are divided, wherein the voltage monitoring sections are connected one another through communication lines; and a control unit which is connected to the voltage monitoring section through the communication lines. The voltage monitoring section compares the respective detected voltages of the unit cells with the threshold voltage to determine a result of the comparison, and transmits the comparison result to the control unit. In a case where the threshold voltage is changed, the control unit transmits a registration signal indicating the changed threshold voltage, and when received the registration signal, the voltage monitoring section changes the stored threshold voltage to the changed threshold voltage. | 12-09-2010 |
20100315096 | INSULATION RESISTANCE DETECTING APPARATUS - An insulation resistance detecting apparatus is provided to detecting an insulation resistance of a load circuit. The insulation resistance detecting apparatus comprises: a coupling capacitor of which a first end is connected to the load circuit; a periodic waveform output section which is connected to a second end of the coupling capacitor, and outputs a periodic waveform to the second end; a waveform shaping section which extracts and amplifies a part of the periodic waveform including a peak point; and an arithmetic operation section which determines the insulation resistance of the load circuit on the basis of a first wave height value as a wave height value of a waveform outputted from the waveform shaping section and a second wave height value as a wave height value of the periodic waveform. | 12-16-2010 |
20100321026 | VOLTAGE MEASURING APPARATUS FOR ASSEMBLED BATTERY - There is provided a voltage measuring apparatus for measuring a voltage of an assembled battery in which a plurality of unit cells are connected in series. The voltage measuring apparatus comprises: block voltage detection sections, each section measuring a voltage of each block of a plurality of blocks into which the plurality of unit cells are divided; a reference voltage output section provided in each of the voltage detection sections to output a reference voltage; a difference voltage calculating section which calculates a difference voltage between measured values of the reference voltages measured by two block voltage detection sections; a difference voltage determination section which determines whether each of the difference voltages exceeds a given threshold voltage or not; and an abnormality determination section which determines that abnormality occurs in the voltage measuring apparatus when at least one of the difference voltages is determined as greater than the threshold voltage. | 12-23-2010 |
20110031976 | VOLTAGE MEASURING APPARATUS FOR ASSEMBLED BATTERY - A voltage measuring apparatus measures an output voltage of an assembled battery in which a plurality of unit cells are connected in series and are divided into a plurality of blocks. The apparatus includes: a block voltage detection section which detects a voltage of at least one of the plurality of blocks and provides an analog voltage signal; a reference power supply which generates a reference voltage; a sampling voltage generation section which generates a sampling voltage based on the reference voltage; a storage for storing voltage date corresponding to the sampling voltage; and an A/D conversion section of the block voltage detection section that digitizes the sampling voltage with the reference voltage for A/D conversion. A difference between the digitized sampling voltage and the voltage data is calculated and it is determined that abnormality occurs in the A/D conversion section when the difference is larger than a threshold. | 02-10-2011 |
20110050236 | STATE MONITORING UNIT FOR ASSEMBLED BATTERY - A state monitoring unit monitors a state of an assembled battery in which unit cells are connected in series. The state monitoring unit includes a plurality of voltage monitoring devices and a controller. The controller transmits a common voltage measurement command to the voltage monitoring devices connected in a daisy-chain scheme. Each of the voltage monitoring devices measures the voltage of the corresponding unit cells in response to the command that is received from the controller or the adjacent voltage monitoring device at a leading end of the communication channel, and transmits the command to the adjacent voltage monitoring device at a termination of the communication channel. When received the measured voltage from the adjacent voltage monitoring device at the termination, the voltage monitoring device transmits it with the own measured voltage. The controller determines the abnormality in reception state based on the number of received, measured voltages. | 03-03-2011 |
20110050237 | STATE MONITORING UNIT FOR ASSEMBLED BATTERY - A state monitoring unit monitors a state of an assembled battery in which a plurality of unit cells are connected in series. The state monitoring unit includes: a plurality of voltage monitoring devices provided in a high voltage side and a controller provided in a low voltage side electrically isolated with the high voltage side. The controller transmits a common voltage measurement command to the respective voltage monitoring devices connected via a communication channel in a daisy-chain scheme. The controller includes a storage for storing latency time determined based on a required time for each of the voltage monitoring devices elapsing from transmission of the common voltage measurement command with respect to the communication channel to voltage measurement of the unit cells, and measures charging/discharging current of the assembled battery when the latency time has elapsed from the transmission of the common voltage measurement command with respect to the communication channel. | 03-03-2011 |
20110057659 | VOLTAGE MEASURING DEVICE - A voltage measuring device includes a current detecting section that detects a charging or discharging current of a multiple-set battery; block voltage detecting sections that detect voltages of a plurality blocks respectively; and a control section that outputs a request to the block voltage detecting sections via a first communication line to acquire voltage data. Each of the block voltage detecting sections includes an active power source and a lower-power source. The control section transmits a low-power consumption mode setting signal to the block voltage detecting sections respectively when the charging or discharging current has not been detected by the current detecting section for a first time period. Each of the block voltage detecting sections switches an operating mode from a normal mode to a low-power consumption mode when the low-power consumption mode setting signal is received. | 03-10-2011 |
20120280695 | VOLTAGE DETECTION APPARATUS - A voltage detection apparatus includes first to third circuit boards are provided on first to third battery packs of a battery system respectively. The first circuit board includes a first voltage detection portion detecting a voltage of the first battery pack, a control portion controlling the first voltage detection portion, and a first insulation device which connecting the first voltage detection portion with the control portion. The second circuit board includes a second voltage detection portion detecting a voltage of the second battery pack, and a second insulation device connecting the second voltage detection portion with the control portion. The third circuit board includes a third voltage detection portion connected in series with the second voltage detection portion and detecting a voltage of the third battery pack. The control portion controls the second and third voltage detection portions. | 11-08-2012 |
20130022844 | VOLTAGE MEASUREMENT DEVICE FOR BATTERY ASSEMBLY - A voltage measurement device for measuring an output voltage of a battery assembly includes voltage addition sections that add a predetermined voltage value to output voltages of the cells, voltage detection sections that detect addition voltages which are output voltages of the voltage addition sections corresponding to the cells of the individual blocks, A/D converting sections that digitize analog voltage signals of the addition voltages detected by the voltage detection sections, and a control section that outputs voltage measurement request signals to the voltage detection sections respectively, and that acquires the addition voltages, subtracts the predetermined voltage value from the acquired addition voltages and provides voltage values after the subtractions, as the output voltages of the cells. | 01-24-2013 |
20130043861 | VOLTAGE DETECTION DEVICE FOR FUEL CELL - A voltage detection device includes voltage detection sections that measure cell voltages in the blocks, a control section, and (N−1) or less converters that raise the voltage, which is supplied from a DC power source, to a voltage of a driving power source for the voltage detection section. In a case where a voltage detected by at least one voltage detection section among the voltage detection sections which operate by the power supplied from the respective converters, exceeds a predetermined threshold value, the control section controls at least one voltage detection section among the voltage detection sections to operate using the cell voltage of each of the blocks as a driving power source and acquires the cell voltage in each of the blocks. | 02-21-2013 |
20130057289 | VOLTAGE MEASURING APPARATUS FOR BATTERY ASSEMBLY - A voltage measuring apparatus includes polarity detection units that are each provided for a respective one of cells to detect polarities of the voltages output from the cells, absolute value detection units that are each provided for the respective one of the cells to detect absolute values of the voltages, A/D conversion units that are each provided for a respective one of a plurality of blocks and which includes at least one cell, to digitalize the absolute values of the voltages in correspondence with the cell of the respective blocks, and voltage detection units that calculate the output voltages with the polarities for the respective cells based on the digitalized absolute values of the voltages and the polarities of the voltages to detect the total voltages of the output voltages with the polarities for each of the blocks. | 03-07-2013 |
20130187660 | VOLTAGE MEASURING APPARATUS FOR PLURAL BATTERY - In a voltage measuring apparatus for a plural battery according to the present invention, each of voltage detecting ICs ( | 07-25-2013 |
20130229169 | VOLTAGE DETECTION DEVICE - A voltage detection device includes: a plurality of voltage-detecting ICs installed in order to detect voltages of a plurality of blocks of a secondary battery, each of the voltage-detecting ICs being installed for each of the blocks; and an interruption control unit that controls interruption operations of the voltage-detecting ICs. After resetting all of the voltage-detecting ICs by transmitting a trigger signal to all of the voltage detecting ICs, the interruption control unit transmits a control signal in which an address of a voltage-detecting IC allowed to execute an interruption operation is designated. Each of the voltage-detecting ICs receives the control signal within a designated time set in advance, executes the interruption operation when an address of its own is designated, and is left reset when the address of its own is not designated. | 09-05-2013 |
20130234719 | VOLTAGE MONITORING APPARATUS FOR PLURAL BATTERY - A fail signal indicating overcharge/overdischarge of unit cells detected by voltage detecting ICs ( | 09-12-2013 |