Patent application number | Description | Published |
20080213668 | Nonaqueous Electrolyte Secondary Battery - A nonaqueous electrolyte secondary battery has a positive electrode including an active material of complex oxides capable of storing and emitting lithium ions, a negative electrode, a separator, and an electrolytic solution made of a nonaqueous solvent. A discharge curve of this battery when being discharged with a constant power has two or more points of step-like flections near the end of electrical discharge in a range of 5% to 20% of a discharge capacity thereof as determined from an initial discharge voltage in a state of full charge to a discharge-end voltage. | 09-04-2008 |
20100001693 | DETERIORATION DETERMINATION CIRCUIT, POWER SUPPLY APPARATUS, AND DETERIORATION DETERMINATION METHOD OF SECONDARY BATTERY - Provided is a deterioration determination circuit configuring by including: an SOC detection unit for detecting an SOC of a secondary battery; an internal resistance detection unit for detecting an internal resistance value of the secondary battery; a first determination unit for determining the status of deterioration of the secondary battery based on the internal resistance value detected by the internal resistance detection unit when the SOC detected by the SOC detection unit is within a range of a pre-set first range; a second determination unit for determining the status of deterioration of the secondary battery based on the internal resistance value detected by the internal resistance detection unit when the SOC detected by the SOC detection unit is within a range of a pre-set second range as a range of an SOC, in which a variation of the internal resistance of the second battery in relation to a variation of the SOC of the secondary battery is different from the first range; and a final determination unit for ultimately determining that the secondary battery is deteriorated when the first determination unit determines that the secondary battery is of the deteriorated status and the second determination unit additionally determines that the secondary battery is of the deteriorated status. | 01-07-2010 |
20100072951 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY CHARGING METHOD, ELECTRONIC DEVICE, BATTERY PACK, AND CHARGING DEVICE - The present invention aims to quickly charge a non-aqueous electrolyte secondary battery including a heat-resistant layer between a negative electrode and a positive electrode. A method according to the present invention for charging a non-aqueous electrolyte secondary battery including a heat-resistant layer between a negative electrode and a positive electrode is provided with a step of performing pulse charge on the secondary battery, a step of detecting a change amount of a cell voltage associated with a change in the concentration polarization of the non-aqueous electrolyte as a polarization voltage, and a step of terminating the pulse charge when the polarization voltage increases to or above a predetermined threshold value. According to the present invention, it is possible to quickly charge the non-aqueous electrolyte secondary battery including the heat-resistant layer between the negative electrode and the positive electrode at such a borderline level as not to cause overcharge. | 03-25-2010 |
20100188050 | BATTERY INTERNAL SHORT-CIRCUIT DETECTION APPARATUS AND METHOD, AND BATTERY PACK - A battery internal short-circuit detection apparatus includes: a voltage detection unit for detecting a terminal voltage of the battery; a current detection unit for detecting a discharging current of the battery; a voltage drop and recovery detection unit for detecting a momentary voltage drop of the battery and a recovery from the voltage drop, in response to a result of detection performed by the voltage detection unit; and a determination unit for determining that an internal short circuit has occurred, when a maximum value of the discharging current detected by the current detection unit between the voltage drop and the recovery is equal to or lower than a threshold current. | 07-29-2010 |
20100188054 | BATTERY INTERNAL SHORT-CIRCUIT DETECTING DEVICE AND METHOD, BATTERY PACK, AND ELECTRONIC DEVICE SYSTEM - An internal short-circuit detecting device for detecting an internal short circuit of a battery being subjected to constant current charge using a constant current amount (I) has: a voltage detection unit for detecting a terminal voltage of the battery; a terminal voltage acquisition unit for acquiring a terminal voltage (V | 07-29-2010 |
20100201321 | BATTERY INTERNAL SHORT-CIRCUIT DETECTING DEVICE AND METHOD, BATTERY PACK, AND ELECTRONIC DEVICE SYSTEM - A battery internal short-circuit detecting device has: a battery temperature detection unit for detecting a battery temperature Tr; an ambient temperature detection unit for detecting an ambient temperature Te; an average heating value detection unit for detecting an average value Pav of battery heating values per predetermined first period ΔW | 08-12-2010 |
20100253149 | IMBALANCE IDENTIFYING CIRCUIT, POWER SOURCE APPARATUS AND IMBALANCE IDENTIFICATION METHOD - Provided is an imbalance identifying circuit, including: a voltage detection unit for detecting a terminal voltage in each of a plurality of accumulators; a gradient acquisition unit for performing gradient information acquisition processing of suspending charge when the plurality of accumulators are being charged and acquiring, from each of the terminal voltages detected by the voltage detection unit during the suspension of charge, voltage gradient information showing an amount of change per predetermined time of each of the terminal voltages; and an imbalance identification unit for identifying whether an imbalance of the amount of charge in the plurality of accumulators has occurred by using a plurality of pieces of voltage gradient information corresponding to each of the terminal voltages acquired by the gradient acquisition unit. | 10-07-2010 |
20100304206 | BATTERY PACK, AND BATTERY SYSTEM - There are provided at least one aqueous secondary battery and at least one nonaqueous secondary battery having a smaller capacity than that of the aqueous secondary battery. The aqueous secondary battery and the nonaqueous secondary battery are connected in series to constitute a battery pack. | 12-02-2010 |
20100327818 | CHARGE CONTROL CIRCUIT, AND CHARGING DEVICE AND BATTERY PACK INCORPORATED WITH THE SAME - A charge control circuit that controls a charging section which charges a secondary battery by supplying a charging current to the secondary battery. The charge control circuit includes a voltage detection section which detects a terminal voltage of the secondary battery; a primary charge processing section which performs a charge processing of acquiring, as a first terminal voltage, a terminal voltage detected by the voltage detection section while causing the charging section to charge the secondary battery; a charging suspend voltage acquiring section which causes the charging section to suspend the charge after the first terminal voltage has been acquired by the primary charge processing section, and acquires, as a second terminal voltage, a terminal voltage detected by the voltage detection section in a state that the charge is suspended; and a charging end determining section which determines whether or not the charge of the secondary battery is to be terminated, based on a difference between the first terminal voltage acquired by the primary charge processing section and the second terminal voltage acquired by the charging suspend voltage acquiring section. | 12-30-2010 |
20110195284 | BATTERY MODULE AND BATTERY MODULE ASSEMBLY USING SAME - The battery module includes a plurality of battery units, a housing, a wiring board, and a lid. The battery unit is composed of one or more battery cells each having a vent mechanism. At least one surface of the housing is an open end. The housing has a plurality of storage parts partitioned by one or more partition walls. Each battery unit is stored in each storage part. The wiring board covers the open end of the housing, is disposed at the vent mechanism side of the cell, and has connection terminals connected to the battery units. The lid covers the open end of the housing and the wiring board, and has an open part. Through holes are provided on the wiring board in positions facing the battery units and in a different region from that of the connection terminals. | 08-11-2011 |
20110200856 | BATTERY MODULE AND BATTERY PACK USING THE SAME - The battery module includes: a plurality of batteries; a housing | 08-18-2011 |
20110236748 | CURRENT COLLECTOR FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, ELECTRODE, NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR PRODUCING THE SAME - A current collector includes a metal foil with a plurality of through-holes formed therein. The metal foil is divided into two regions of: a distant region distant from a connection portion to be connected to an external terminal; and a close region being close to the connection portion and having the same area as the distant region. The open area ratio of the distant region of the metal foil is larger than that of the close region. Thus, the electrical resistance of the close region is smaller than that of the distant region. Therefore, production of heat in the close region due to passage of current can be suppressed. | 09-29-2011 |
20110250487 | BATTERY PACK - Provided is a battery pack in which the production of heat due to passage of current in a connector for connecting secondary batteries in parallel is made uniform to increase service life and reduce maintenance costs. A positive terminal connector | 10-13-2011 |
20110254559 | BATTERY ABNORMALITY DETECTION CIRCUIT AND POWER SUPPLY DEVICE - A battery abnormality detection circuit includes: a SOC detection unit that detects a SOC of a secondary battery; an internal resistance detection unit that detects an internal resistance value of the secondary battery; a first state acquisition unit that acquires a first SOC and a first resistance value at a predetermined first timing; a second state acquisition unit that acquires a second SOC and a second resistance value at a second timing a storage unit that stores in advance relationship information indicating a correspondence relationship between a SOC and an internal resistance value of the secondary battery; a reference variation value setting unit that sets a reference variation value indicating an amount of variation from an internal resistance value corresponding to the first SOC to an internal resistance value corresponding to the second SOC on the basis of the relationship information stored in the storage unit; and a determination unit that determines that an abnormality has occurred in the secondary battery when an amount of variation from the first resistance value to the second resistance value is different from an amount of variation indicated by the reference variation value that has been set by the reference variation value setting unit. | 10-20-2011 |
20110274951 | BATTERY MODULE AND BATTERY MODULE ASSEMBLY USING SAME - A battery module includes a battery unit, a housing, a lid, and a heat-absorbing member. The battery unit includes two or more battery cells. The housing includes a storage part having an open end on at least one surface, and the storage part stores the battery unit. The lid has an opened part, and covers the open end of the housing. The heat-absorbing member is provided in contact with each side surface of each battery unit, and encloses heat-absorbing agent made of liquid or gel fluid. | 11-10-2011 |
20120135296 | BATTERY MODULE - A battery module | 05-31-2012 |
20120141857 | BATTERY MODULE - A battery module ( | 06-07-2012 |
20120189885 | BATTERY MODULE - A battery module includes a first unit cell, a second unit cell, a first exhaust chamber, and a second exhaust chamber. The first unit cell is disposed so that a positive electrode terminal faces the first direction. The second unit cell is connected in series to the first unit cell, the negative electrode terminal is disposed so as to face the first direction, and the second unit is disposed so as to be adjacent to the first unit cell. The first exhaust chamber is disposed so as to face the positive electrode terminal of the first unit cell, and discharges a gas which is emitted from the positive electrode terminal of the first unit cell. The second exhaust chamber is disposed so as to face the positive electrode terminal of the second unit cell, and discharges a gas generated from the positive electrode terminal of the second unit cell. The end surface of the second unit cell in the first direction and the outer surface of the first exhaust chamber in the first direction are flush with each other. The end surface of the first unit cell in a second direction opposite to the first direction and the outer surface of the second exhaust chamber in the second direction are flush with each other. | 07-26-2012 |
20120225335 | BATTERY MODULE - A battery module which is able to discharge high-temperature gas emitted from an abnormal battery cell to the outside of a case, without adversely affecting normal battery cells, while suppressing as much as possible an increase in the volume of the battery module due to an exhaust chamber, is provided. The battery module of the present invention includes: a case having an opening, and an exhaust port for discharging gas generated inside the case; a plurality of battery cells each having a terminal plate in which an open part for discharging gas generated inside the cell is provided, the battery cells being arranged inside the case with the terminal plates facing the opening of the case; and a lid attached to the case so as to cover the opening of the case, the lid including a flat plate, and a plurality of convex parts which protrude from a plane including the flat plate toward the inside of the case, and are connected to the terminal plates of the battery cells. A gas flow path leading from the open part of each battery cell to the exhaust port of the case is formed by gaps formed between the convex parts of the lid. | 09-06-2012 |
20120263991 | BATTERY PACK - Each battery module | 10-18-2012 |
20120282503 | ELECTRIC DEVICE - An electric device | 11-08-2012 |
20130011719 | BATTERY MODULE AND BATTERY ASSEMBLY USED THEREIN - A battery assembly | 01-10-2013 |
20130136969 | BATTERY MODULE AND BATTERY ASSEMBLY USED IN BATTERY MODULE - A battery module includes a plurality of battery assemblies stacked together. Each of the battery assemblies includes an insulating case which accommodates a plurality of cells. A first connection plate connects the same polarities of the cells, and a second connection plate connects polarities opposite the same polarities of the cells. The first connection plate includes a first connection terminal which protrudes in a direction opposite a direction toward the second connection plate. The second connection plate includes a second connection terminal which protrudes in a direction toward the first connection terminal. The first connection terminal protrudes outwardly of the case. The second connection terminal protrudes inwardly of the case. In the battery assemblies adjacent to each other in a stacking direction, the first connection terminal of one battery assembly and the second connection terminal of the other battery assembly are fitted to each other. The first connection terminal of one battery assembly protrudes inwardly of the case of the other battery assembly. | 05-30-2013 |
20130216884 | BATTERY MODULE - A battery module in which the temperature of a cell with an increased high temperature due to an abnormal state can be quickly reduced so that the high temperature does not affect adjacent cells is provided. | 08-22-2013 |
20140178723 | BATTERY BLOCK AND BATTERY MODULE COMPRISING SAME - A battery block includes a plurality of tubular batteries arranged and housed in a holder. Each of the batteries includes a first external terminal, and a second external terminal. The holder includes a first holder having first tubular housing portions housing upper portions of the batteries in an axis direction, and a second holder having second tubular housing portions housing lower portions of the batteries in the axis direction. The first holder electrically connects the first external terminals together. The second holder electrically connects the second external terminals together. | 06-26-2014 |