NEC ENERGY DEVICES, LTD. Patent applications |
Patent application number | Title | Published |
20160141721 | SECONDARY BATTERY AND ELECTRODE PRODUCTION METHOD - Secondary battery includes a battery assembly configured by alternately stacking positive electrodes | 05-19-2016 |
20160126516 | BATTERY MODULE - To provide a film-covered battery and a battery module having high resistance to external impact. | 05-05-2016 |
20160111759 | BATTERY MODULE - Provided is a battery module whose layout for accurately detecting the average of entire temperature information is realized by a small number of temperature sensors. | 04-21-2016 |
20160111728 | ELECTRODE FOR USE IN A NONAQUEOUS ELECTROLYTE SECONDARY CELL, METHOD FOR PRODUCING SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY CELL - An electrode ( | 04-21-2016 |
20160111220 | NONAQUEOUS ELECTROLYTE SOLUTION, AND LITHIUM ION SECONDARY BATTERY HAVING THE SAME - The exemplary embodiment has an object to provide a nonaqueous electrolyte solution having a flame retardancy over a long period and having a good capacity maintenance rate. The exemplary embodiment is a nonaqueous electrolyte solution containing a lithium salt, at least one oxo-acid ester derivative of phosphorus selected from compounds represented by a predetermined formula, and at least one disulfonate ester selected from a cyclic disulfonate ester and a linear disulfonate ester represented by the predetermined formulae. | 04-21-2016 |
20160104872 | BATTERY CELL - Battery cell | 04-14-2016 |
20160049691 | ELECTROLYTIC SOLUTION FOR SECONDARY BATTERY AND SECONDARY BATTERY USING THE SAME - A secondary battery having excellent charge and discharge efficiency, good cycle characteristics, and a high capacity retention rate is provided. An electrolytic solution for a secondary battery according to this exemplary embodiment contains at least an aprotic solvent and two particular compounds. | 02-18-2016 |
20160043583 | BATTERY PACK, MOBILE BODY, AND CONTROL METHOD THEREOF - Provided is a battery pack capable of solving a problem in which driving becomes unstable. Switches ( | 02-11-2016 |
20160043366 | BATTERY PRODUCTION METHOD AND BATTERY MODULE - A battery production method includes: preparing a battery element in which a positive electrode that includes a positive electrode current collector tab, and a negative electrode that includes a negative electrode current collector tab are stacked or wound through a separator; connecting a positive electrode pulled-out tab to the positive electrode current collector tab and connecting a negative electrode pulled-out tab to the negative electrode current collector tab; enclosing the battery element, positive electrode current collector tab and negative electrode current collector tab in a flexible exterior member, with the positive electrode pulled-out tab and negative electrode pulled-out tab being pulled out; forming a reference portion on the exterior member; and boring, in the positive electrode pulled-out tab and negative electrode pulled-out tab being pulled out of the exterior member, holes that are to be used for fixation, based on the reference portion after formation. | 02-11-2016 |
20160036096 | BATTERY PACK, ELECTRICAL DEVICE, AND CONTROL METHOD THEREFOR - Provided is a battery pack capable of more reliably preventing adverse effects from being externally exerted. MCU ( | 02-04-2016 |
20160028257 | BATTERY SYSTEM - This battery system includes: a plurality of batteries; a first monitoring unit that receives as input the output of the batteries, compares the output with a prescribed threshold value, and supplies a signal indicating the result; and a second monitoring unit that detects the voltage value of the batteries and supplies a signal indicating the detected voltage value. The battery system is provided with: a first operation mode during which the first monitoring unit and the second monitoring unit are halted; a second operation mode during which the first monitoring unit operates and the second monitoring unit is halted; and a third operation mode during which the first monitoring unit and the second monitoring unit operate. | 01-28-2016 |
20160028050 | BATTERY MODULE AND METHOD OF MANUFACTURING SAME - The present invention includes a battery cell ( | 01-28-2016 |
20160020442 | BATTERY PACK - The object of the present invention is to provide a battery pack that can reduce the thickness of the entire battery while ensuring that the film-packaged batteries adhere to each other. The battery pack of the present invention includes: film-packaged battery assembly | 01-21-2016 |
20160020438 | BATTERY PACK - Provided is a battery pack capable of improving volumetric efficiency while reducing the thickness of the entire battery. The battery pack is configured by laminating a plurality of film-sheathed batteries ( | 01-21-2016 |
20150380777 | LITHIUM ION SECONDARY BATTERY AND CHARGING METHOD THEREFOR - A method for charging a lithium ion secondary battery including at least a positive electrode, a negative electrode provided with a negative electrode active material layer that includes carbon as a negative electrode active material, an electrolytic solution, and a sheathing material that encloses the positive electrode, the negative electrode and the electrolytic solution; the negative electrode active material layer including carboxymethyl cellulose and the electrolytic solution including an additive that can be decomposed at a predetermined voltage includes: preliminary charging including constant-current charging in which charging is performed at a fixed current value and, following the constant-current charging, constant-voltage charging in which charging is performed at a fixed voltage; degassing in which gas is removed from within the sheathing material after the preliminary charging; and main charging that follows the degassing in which the lithium ion secondary battery is charged. The fixed voltage during the constant-voltage charging is at least 3.3 V per cell. | 12-31-2015 |
20150380716 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery includes a negative electrode in which a negative electrode active material layer is formed on a negative electrode collector, and a positive electrode laminated on the negative electrode through a separator, in which a positive electrode active material layer is formed on a positive electrode collector. The positive electrode active material layer on a surface of a positive electrode tab drawn from the positive electrode collector has a region which extends in a drawing direction of the positive electrode tab, exceeding a leading end line of a vertically projected negative electrode active material layer opposed to the positive electrode active material layer and in which an existing amount of the positive electrode active material layer is reduced toward its leading end portion. | 12-31-2015 |
20150325822 | FILM-COVERED BATTERY - Provided is a film-covered battery having a film covering material as an exterior body and excellent in long-term reliability. | 11-12-2015 |
20150325818 | POWER STORAGE DEVICE - A power storage device having both replaceability of a battery module and excellent vibration resistance/impact resistance, includes: a bottom plate having a plurality of lower guide members; a top plate provided above the bottom plate and having a plurality of upper guide members facing the lower guide members; a first side plate and a second side plate provided between the bottom plate and the top plate so as to face each other; a back surface plate provided between the first and second side plates and having a plurality of connectors; a battery module inserted between the lower and upper guide members and having connectors to be fitted to the connectors of the back surface plate; and a pressing plate provided between and fixed to the first and second side plates so as to press the battery module. | 11-12-2015 |
20150288026 | LITHIUM-ION SECONDARY BATTERY AND METHOD OF PRODUCING THE SAME - Provided is a battery in which collector foil is unlikely to break. | 10-08-2015 |
20150263381 | POLYMER GEL ELECTROLYTE, LITHIUM ION BATTERY AND METHOD FOR PRODUCING SAME - A polymer gel electrolyte containing at least a lithium salt and an aprotic solvent, in which an amorphous polymer layer is formed on the surface of an electrode active material. | 09-17-2015 |
20150236535 | POWER STORAGE SYSTEM AND CELL PROTECTION METHOD - This power storage system is provided with a secondary cell pack ( | 08-20-2015 |
20150228945 | BATTERY PACK - Provided is a battery pack that is unlikely to be affected by vibration, shock, or the like, and has stable characteristics. | 08-13-2015 |
20150221909 | BATTERY PACK - Provided is a battery pack that is unlikely to be affected by vibration, shock, or the like, and has stable characteristics. | 08-06-2015 |
20150207347 | STORAGE BATTERY DEVICE - A voltage measurement unit ( | 07-23-2015 |
20150207185 | SECONDARY BATTERY PACK AND AUTHENTICATION METHOD - An authenticator ( | 07-23-2015 |
20150207178 | BATTERY MODULE - To provide a battery module having excellent vibration resistance/impact resistance, a battery module according to the present invention is constructed by an electrode laminate | 07-23-2015 |
20150200425 | LITHIUM SECONDARY BATTERY AND CONTROL SYSTEM THEREFOR, AND METHOD FOR DETECTING STATE OF LITHIUM SECONDARY BATTERY - There is provided a control system for a lithium secondary battery that can quantitatively sense a deterioration state inherent in a lithium secondary battery using silicon oxide as a negative electrode active material, that is, the nonuniform reaction state of a negative electrode. A control system for a lithium secondary battery including a positive electrode, a negative electrode using silicon oxide as a negative electrode active material, and a lithium reference electrode having a reference potential with respect to the negative electrode includes measurement means for measuring a voltage V of the negative electrode with respect to the lithium reference electrode and a discharge capacity Q of the lithium secondary battery during discharge of the lithium secondary battery; generation means for generating a V-dQ/dV curve representing a relationship between dQ/dV, which is a proportion of an amount of change dQ in the discharge capacity Q to an amount of change dV in the voltage V, and the voltage V; calculation means for calculating an intensity ratio of two peaks appearing on the V-dQ/dV curve for two voltage values in the voltage V; and sensing means for sensing a state of the negative electrode utilizing the intensity ratio. | 07-16-2015 |
20150200416 | ELECTRODE ROLL AND MANUFACTURING METHOD FOR ELECTRODE ROLL - To provide an electrode roll capable of preventing lowering of production efficiency due to active material particles that have fallen. An electrode roll ( | 07-16-2015 |
20150147638 | BATTERY PACK - To provide a battery pack less subject to vibration, shock, or the like and stable in characteristics. | 05-28-2015 |
20150125732 | POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a positive electrode for non-aqueous electrolyte battery free from internal short circuit and large in charging and discharging capacity. | 05-07-2015 |
20150111080 | BATTERY APPARATUS - In order to solve at least one of the drawbacks that result from a state in which a plurality of secondary batteries are integrated, a battery apparatus having a plurality of flat secondary batteries | 04-23-2015 |
20150104711 | NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE SLURRY FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY - A negative electrode for a lithium ion secondary battery according to the present invention includes a negative electrode active material and a binder, in which the negative electrode active material satisfies the following requirements (A), (B), and (C): | 04-16-2015 |
20150104701 | LITHIUM ION SECONDARY CELL - Provided is a lithium ion secondary cell using lithium manganese-based oxide as a positive electrode active material, wherein SEI films suppressing deterioration during repeated charge/discharge are easily formed not only on the negative electrode surface, but also on the positive electrode surface, deterioration in capacity upon use, in particular, under high-temperature environments is suppressed, charge/discharge cycle characteristics are improved and lifespan is lengthened. The lithium ion secondary cell includes a positive electrode active material layer containing lithium manganese-based oxide as a positive electrode active material, a negative electrode active material layer containing a negative electrode active material, and an electrolytic solution used to immerse the positive electrode active material layer and the negative electrode active material layer, wherein the positive electrode active material layer contains carbon nanotubes and the electrolytic solution contains sulfonic acid ester. | 04-16-2015 |
20150086865 | POSITIVE ELECTRODE FOR SECONDARY BATTERY, SECONDARY BATTERY, AND METHODS FOR MANUFACTURING THE SAME - The present invention provides a positive electrode for a secondary battery that can suppress a phenomenon in which, after the solid electrolyte interface is formed once, when a damaged portion where a solid electrolyte interface is partially broken happens to arise in the solid electrolyte interface, the continued deterioration in the performance of charge-discharge cycle of the secondary battery is induced thereby, and a secondary battery using said positive electrode for a secondary battery. The positive electrode for a secondary battery according to the present invention comprises water that is chemically adsorbed beforehand in the positive electrode, wherein the concentration of the chemically adsorbed water, which is comprised in the positive electrode beforehand, is set in the range of 0.03% by mass to 0.15% by mass based on the positive electrode. | 03-26-2015 |
20150069973 | BATTERY CONTROL SYSTEM, BATTERY PACK, ELECTRONIC DEVICE - A measurement unit ( | 03-12-2015 |
20150048795 | CHARGE CONTROL APPARATUS AND CHARGE CONTROL METHOD - A charge control apparatus which includes charger | 02-19-2015 |
20150044512 | POWER STORAGE DEVICE - A power storage device including a battery containing body and a chassis for housing the body, further including
| 02-12-2015 |
20150035494 | ELECTRICITY STORAGE SYSTEM, METHOD FOR CONTROLLING SECONDARY BATTERY PACKS, AND SECONDARY BATTERY PACK - In an electricity storage system that has a plurality of secondary battery packs, at the time of switching the object that is to be charged from a first secondary battery pack to a second secondary battery pack that has voltage across terminals lower than that of the first secondary battery pack, by causing a current-limiting circuit of the second secondary battery pack to operate, forms a path for the flow of a charging current for charging secondary batteries that are provided in the second secondary battery pack, and starts charging of the second secondary battery pack while limiting the charging current to a fixed value or less by means of the current-limiting circuit. | 02-05-2015 |
20150030935 | BATTERY ELECTRODE SUBSTRATE SHEET - To provide a battery electrode substrate sheet capable of reducing a waste part, in which a defect part is included, of an electrode active material coating film coated on a collector. | 01-29-2015 |
20150030889 | POWER STORAGE DEVICE - A power storage device includes a battery containing body, an electronic device unit, and a chassis for housing them, wherein at a side surface portion of the chassis, an opening for inserting and removing the battery containing body and the electronic device unit is provided; an openable and closable pivoting member is provided inside the opening, the pivoting member, when closed, preventing removal of the battery containing body, and when opened, preventing insertion of the electronic device unit as removed; and the electronic device unit is housed and disposed adjacent to the battery containing body, and includes an opening prevention guide capable of engaging with the pivoting member and thereby preventing the pivoting member from being opened when the electronic device unit is housed. | 01-29-2015 |
20150025825 | BATTERY PACK AND METHOD FOR CALCULATING ELECTRIC ENERGY OF BATTERY PACK - A battery pack ( | 01-22-2015 |
20150017523 | ELECTRODE MANUFACTURING METHOD - To provide an electrode ensuring excellent characteristics even when the electrode formed on a foil-like collector is compressed under a comparatively low temperature condition. | 01-15-2015 |
20150008885 | BATTERY CONTROL SYSTEM, BATTERY PACK, ELECTRONIC DEVICE AND CHARGER - A battery pack ( | 01-08-2015 |
20140370940 | BATTERY CONTROL SYSTEM, BATTERY PACK, ELECTRONIC DEVICE AND CHARGER - A plurality of battery cells ( | 12-18-2014 |
20140295233 | LITHIUM-ION SECONDARY BATTERY - A lithium-ion secondary battery includes: an electrode body in which a positive electrode and a negative electrode are stacked or wound through a separator; a plurality of positive electrode tabs drawn from the electrode body; a plurality of negative electrode tabs drawn from the electrode body; a joint portion between the positive electrode tabs and a positive electrode lead tab; and a joint portion between the negative electrode tabs and a negative electrode lead tab. Apart of a metal plate is disposed on a surface of the positive electrode tab or positive electrode lead tab in the joint portion and on a surface of the negative electrode tab or negative electrode lead tab in the joint portion and joined integrally thereto, and a remaining part of the metal plate is wound around the joint portions. | 10-02-2014 |
20140248534 | LITHIUM ION SECONDARY BATTERY ELECTRODE, METHOD OF MANUFACTURING THE SAME, AND LITHIUM ION SECONDARY BATTERY - A lithium ion secondary battery electrode according to the present invention includes (A) a non-fluorinated polymer; (B) an active material; (C) a thickener; and (D) a conductive auxiliary agent. An elution ratio of (A) the non-fluorinated polymer in an electrolytic solution solvent at 60° C. is equal to or less than 1.0 mass %, and a swelling ratio of (A) the non-fluorinated polymer in the electrolytic solution solvent at 60° C. is equal to or more than 10 mass % and equal to or less than 50 mass %. | 09-04-2014 |
20140193710 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - To provide a non-aqueous electrolyte secondary battery less subject to impact by vibration, impact, etc., and has stable characteristics. The non-aqueous electrolyte secondary battery includes: a positive electrode part in which a positive electrode active material layer is formed on a positive collector; a positive electrode which is provided with a positive electrode lead tab and which is integrally formed with the positive collector so as to be connected to a periphery of the positive electrode part through a curved portion continuing therefrom; a negative electrode part in which a negative electrode active material layer is formed on a negative collector; a negative electrode which is provided with a negative electrode lead tab and which is integrally formed with the negative collector so as to be connected to a periphery of the negative electrode part through a curved portion continuing therefrom; and a separator which is interposed between the positive and negative electrodes. A positive electrode active material layer is formed at least on both sides of the positive electrode lead tab, and a projection portion obtained by vertically projecting the positive electrode part on the negative electrode part exists inward an outline of the negative electrode active material layer. | 07-10-2014 |
20140184167 | SECONDARY BATTERY PACK SYSTEM - To provide a secondary battery pack system that controls battery packs which are connected in parallel without requiring a complex system configuration, a secondary battery pack system of the present invention that supplies power to an electronic device includes a plurality of battery packs each having a controller, a main body side connection circuit which is provided on the electronic device side so as to be connected to the plurality of battery packs, and a main body side discharge control signal line which is provided in the main body side connection circuit. The main body side discharge control signal line and controllers of the plurality of battery packs are connected to each other. | 07-03-2014 |
20140162114 | BATTERY MODULE - To provide a battery module that easily can be made thinner and maintain reliability, a battery module of the present invention includes: a flat-plate base that includes a front surface and a back surface as two main surfaces; peripheral partition wall sections ( | 06-12-2014 |
20140159664 | METHOD OF MANUFACTURING BATTERY PACK AND BATTERY PACK - A battery pack that has multiple battery units that differ in full charge capacity is charged and discharged to the maximum. A method of manufacturing the battery pack includes the following steps. First, battery cells that differ in full charge capacity are individually charged to be charged up to the full charge capacity (a charge step, S | 06-12-2014 |
20140154556 | BATTERY MODULE - To provide a large-capacity battery module that easily can ensure a high level of flame retardancy, a battery module of the present invention includes: an assembled battery in which a plurality of sheet-like unit batteries are stacked; a flat-plate base that includes a front surface and a back surface as two main surfaces; and a peripheral partition wall section ( | 06-05-2014 |
20140152267 | BATTERY SYSTEMS AND REMAINING CAPACITY MANAGEMENT SYSTEMS FOR SECONDARY BATTERY - A battery system according to the present invention includes a secondary battery; a battery control unit that controls charging and discharging of said secondary battery; and a charging/discharging management unit that controls the charging and discharging of said secondary battery through said battery control unit, wherein said battery control unit, if an abnormality occurred during operation of said battery control unit, transmits remaining capacity data that represent a remaining capacity of said secondary battery that remained immediately before the abnormality occurred to said charging/discharging management unit. | 06-05-2014 |
20140141321 | BATTERY MODULE - To provide a battery module that easily can maintain excellent battery characteristics such as repeated charge-and-discharge performance, the present invention is a battery module that houses a laminate-type unit battery ( | 05-22-2014 |
20140141309 | BATTERY MODULE - To provide a battery module that can easily ensure a high level of flame retardancy, a battery module of the present invention includes: a flat-plate base that includes a front surface and a back surface as two main surfaces; a compartmentalization partition wall section ( | 05-22-2014 |
20140087249 | LITHIUM ION BATTERY - The purpose of the present invention is to provide a lithium-ion battery that exhibits excellent long-term life properties, does not suffer from rapid capacity degradation, and exhibits excellent charging/discharging characteristics in low-temperature environments. The present invention is directed to a lithium ion battery comprising: a negative electrode which comprises a negative electrode active material containing at least one of a graphite and an amorphous carbon, conductive additives containing a graphite, and a binder; a nonaqueous electrolyte solution; and a positive electrode containing a positive electrode active material capable of occluding and releasing lithium. The negative electrode active material has a spherical or massive shape, the conductive additives have a platy shape, and a part of an edge surface of the conductive additives contacts a surface of the negative electrode active material. The nonaqueous electrolyte solution contains a solvent, and an additive which reductively decomposes at a voltage lower than a reduction voltage of the solvent. | 03-27-2014 |
20140045027 | BATTERY PACK - In order to provide a battery pack to which a reuse prevention measure is applied in such a way that unit batteries become damaged and useless after the battery pack is disassembled, a battery pack of the present invention is characterized by including a plurality of unit batteries | 02-13-2014 |
20140028262 | SECONDARY BATTERY PACK - Provided is a secondary battery pack that determines, as for protection and controlling, the state of connection based on information input from external interfaces and switches a protection and control mode from one setting to another according to connection targets and situations. The secondary battery block of the present invention includes a secondary battery block having secondary batteries connected; a current detection section that monitors a charge and discharge current of the secondary battery block; an output voltage detection section that monitors the output voltage; a communication terminal; an ID terminal that detects a connection to a device; and a control section. The control section controls the charging and discharging of the battery pack, calculates capacitance and performs other processes to control the operation of the battery pack as a whole on the basis of electric potential/communication information from the communication terminal and device connection information from the ID terminal. | 01-30-2014 |
20140017542 | BATTERY PACK AND ELECTRIC BICYCLE - To provide a battery pack that is less likely to be affected by vibrations, shocks and the like and has a stable characteristic, and an electric bicycle that uses the battery pack. | 01-16-2014 |
20140017541 | BATTERY PACK AND ELECTRIC BICYCLE - There is provided a battery pack having excellent vibration-resistant impact-resistant, and battery temperature characteristics. The battery pack includes a battery protective member having a first plate section | 01-16-2014 |
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 |
20130337300 | SECONDARY BATTERY - The present invention includes: electrode layered assembly ( | 12-19-2013 |
20130320930 | POWER STORAGE SYSTEM AND SECONDARY BATTERY CONTROL METHOD - A power storage system includes a plurality of secondary battery packs and an upper controller. When causing an additional discharge secondary battery pack that is not being discharged to start being discharged by connecting the additional discharge secondary battery pack in parallel with a discharging secondary battery pack that is being discharged, in a state in which some of the secondary battery packs are being discharged, the upper controller predicts discharge start timing at which inter-terminal voltages of the additional discharge secondary battery pack and the discharging secondary battery pack correspond to each other. Subsequently, the upper controller causes the additional discharge secondary battery pack to start being discharged at the discharge start timing. | 12-05-2013 |
20130295465 | LITHIUM ION BATTERY - There is provided a lithium ion battery having high flame retardancy and good cycle characteristics on a long-term basis. The lithium ion battery according to this exemplary embodiment is a lithium ion battery comprising a nonaqueous electrolytic solution or gel electrolyte containing a Li salt and an oxoacid ester derivative of phosphoric acid; a group of stacked electrode in which positive electrodes comprising a positive electrode layer comprising a positive electrode active material disposed on at least one surface of a positive electrode current collector, and negative electrodes comprising a negative electrode layer comprising a negative electrode active material disposed on at least one surface of a negative electrode current collector are alternately stacked via separators; and a package containing the nonaqueous electrolytic solution or gel electrolyte and the group of stacked electrode, wherein both of two electrodes A disposed on outermost sides of the group of stacked electrode, respectively, satisfy 0≦(Wc/Wb)≦0.55 when a mass of an electrode active material contained in an electrode active material-coated layer B disposed on a group-of-stacked-electrodes side of an electrode current collector is Wb, and a mass of an electrode active material contained in an electrode active material-coated layer C disposed on a package side of the electrode current collector is Wc. | 11-07-2013 |
20130288087 | BATTERY APPARATUS - In order to solve at least one of the drawbacks that result from a state in which a plurality of secondary batteries are integrated, a battery apparatus having a plurality of flat secondary batteries | 10-31-2013 |
20130280594 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - In a nonaqueous electrolyte secondary battery using silicon and silicon oxide as a negative electrode active material, the charge and discharge cycle characteristics are improved. A nonaqueous electrolyte secondary battery in the exemplary embodiment comprises a sheet-shaped negative electrode comprising a negative electrode active material layer comprising a composite of silicon and silicon oxide formed on a negative electrode current collector, and a sheet-shaped positive electrode comprising a positive electrode active material layer formed on a positive electrode current collector, wherein the negative electrode is disposed opposed to the positive electrode via a separator, a peripheral edge portion of the negative electrode active material layer is disposed within a peripheral edge portion of the positive electrode active material layer, and a relationship of 1.0010-24-2013 | |
20130266847 | LITHIUM SECONDARY BATTERY - The object of an exemplary embodiment of the invention is to provide a lithium secondary battery which has high energy density by containing a positive electrode active substance operating at a potential of 4.5 V or higher with respect to lithium and which has excellent cycle property. An exemplary embodiment of the invention is an lithium secondary battery, which comprises a positive electrode comprising a positive electrode active substance and an electrolyte liquid comprising a nonaqueous electrolyte solvent; wherein the positive electrode active substance operates at a potential of 4.5 V or higher with respect to lithium; and wherein the nonaqueous electrolyte solvent comprises a fluorine-containing phosphate represented by a prescribed formula. | 10-10-2013 |
20130265008 | DISCHARGE CONTROLLER - Remaining capacity calculation section ( | 10-10-2013 |
20130249497 | DISCHARGE CONTROLLER - Remaining capacity calculation section ( | 09-26-2013 |
20130249491 | DISCHARGE CONTROLLER - Remaining capacity calculation section ( | 09-26-2013 |
20130244086 | NEGATIVE ELECTRODE FOR SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - Provided are a negative electrode for a secondary battery realizing satisfactory cycle characteristics and a method for manufacturing the same, and a nonaqueous electrolyte secondary battery having satisfactory cycle characteristics. A negative electrode for a secondary battery formed by bonding a negative electrode active material to a negative electrode collector with a negative electrode binder, in which the negative electrode binder is a polyimide or a polyamide-imide, and the negative electrode collector is a Cu alloy containing at least one metal (a) selected from the group consisting of Sn, In, Mg and Ag and has a conductivity of 50 IACS % or more. The negative electrode for a secondary battery can be manufactured by a method including forming a negative electrode layer containing the negative electrode active material and the precursor of the negative electrode binder on the negative electrode collector; and bonding the negative electrode active material to the negative electrode collector with the negative electrode binder by curing the precursor of the negative electrode binder at 250 to 350° C. | 09-19-2013 |
20130230779 | GEL ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY - An object of the present invention is to provide a gel electrolyte for a lithium ion secondary battery having flame retardancy over a long period and a good capacity maintenance rate. The gel electrolyte for a lithium ion secondary battery according to the exemplary embodiment contains a lithium salt, a copolymer of at least one first monomer selected from compounds represented by chemical formulae (1) and (2) and a second monomer represented by chemical formula (4), at least one oxo-acid ester derivative of phosphorus selected from compounds represented by chemical formulae (5) to (7), and at least one disulfonate ester selected from a cyclic-chain type disulfonate ester represented by chemical formula (8) and a linear-chain type disulfonate ester represented by chemical formula (9). | 09-05-2013 |
20130221907 | CHARGING APPARATUS - A controller ( | 08-29-2013 |
20130171497 | STACKED SECONDARY BATTERY - The present invention relates to a stacked secondary battery that includes a laminated body, the laminated body including: a first electrode ( | 07-04-2013 |
20130136987 | POSITIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY AND SECONDARY BATTERY USING THE SAME - Provided is a lithium ion positive electrode active material for a secondary battery that can realize a high operating voltage and a high capacity while suppressing capacity drop with cycles by using a low-cost material. A positive electrode active material for a secondary battery, which is a lithium manganese composite oxide represented by the following general formula (I) | 05-30-2013 |
20130122373 | LITHIUM ION SECONDARY BATTERY - Provided is a lithium ion secondary battery which is low in capacity drop of the battery during fast-charge and has high energy density. In the present lithium ion secondary battery, the positive electrode contains a lithium nickel manganese oxide represented by formula (I): | 05-16-2013 |
20130119940 | LITHIUM SECONDARY BATTERY AND CONTROL SYSTEM THEREFOR, AND METHOD FOR DETECTING STATE OF LITHIUM SECONDARY BATTERY - There is provided a control system for a lithium secondary battery that can quantitatively sense a deterioration state inherent in a lithium secondary battery using silicon oxide as a negative electrode active material, that is, the nonuniform reaction state of a negative electrode. A control system for a lithium secondary battery including a positive electrode, a negative electrode using silicon oxide as a negative electrode active material, and a lithium reference electrode having a reference potential with respect to the negative electrode includes measurement means for measuring a voltage V of the negative electrode with respect to the lithium reference electrode and a discharge capacity Q of the lithium secondary battery during discharge of the lithium secondary battery; generation means for generating a V-dQ/dV curve representing a relationship between dQ/dV, which is a proportion of an amount of change dQ in the discharge capacity Q to an amount of change dV in the voltage V, and the voltage V; calculation means for calculating an intensity ratio of two peaks appearing on the V-dQ/dV curve for two voltage values in the voltage V; and sensing means for sensing a state of the negative electrode utilizing the intensity ratio. | 05-16-2013 |
20130119934 | SECONDARY BATTERY PACK CONNECTION CONTROL METHOD, POWER STORAGE SYSTEM, AND SECONDARY BATTERY PACK - A power storage system has a plurality of secondary battery packs and a host device. The secondary battery packs each have: secondary batteries; a charge switch means that turns a charging path to the secondary batteries ON and OFF; a discharge switch means that turns a discharging path from the secondary battery ON and OFF; and a current-limiting means that causes the secondary battery to discharge while limiting the current to, or below, a fixed value. When switching from the secondary battery pack connected to the input/output terminals of the system to a first secondary battery pack in which voltage is higher than in the second secondary battery pack, the host device causes the charge switch means of the second secondary battery pack to turn OFF the charging path while in a state in which the current limiting means of the first secondary battery pack will cause a discharge operation to begin while limiting the flow of current. | 05-16-2013 |
20130119318 | BINDER FOR LITHIUM ION SECONDARY BATTERY ELECTRODE, SLURRY OBTAINED USING THE BINDER FOR ELECTRODE, ELECTRODE OBTAINED USING THE SLURRY, AND LITHIUM ION SECONDARY BATTERY USING THE ELECTRODE - An object of the present invention is to provide: a binder for a lithium ion secondary battery electrode, which is water-dispersible type and has favorable adhesion between active materials and between the active material and current collectors, along with charge-discharge high-temperature cycle characteristics; a slurry using the binder; an electrode using the slurry; and a lithium ion secondary battery using the electrode. The present invention relates to a binder composition for a lithium ion secondary battery electrode, which is obtained by emulsion polymerization of an ethylenically unsaturated monomer in the presence of a surfactant, the ethylenically unsaturated monomer containing, as essential constituents, 15 to 70 mass % of styrene with respect to the total mass of ethylenically unsaturated monomers, an ethylenically unsaturated carboxylic acid ester, an ethylenically unsaturated carboxylic acid and an internal cross-linking agent. | 05-16-2013 |
20130101899 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - There is provided a nonaqueous electrolyte secondary battery having high capacity in which the reduction in the capacity of the battery due to the irreversible capacity in the first charge and discharge is suppressed using a high capacity positive electrode. The nonaqueous electrolyte secondary battery according to the exemplary embodiment includes a positive electrode and a negative electrode including at least one negative electrode active material selected from the group consisting of Si, a Si oxide and carbon, wherein the positive electrode includes a positive electrode active material including an oxide capable of absorbing and releasing lithium and a transition metal oxide, the transition metal oxide being represented by Li | 04-25-2013 |
20130066575 | VOLTAGE MEASURING CIRCUIT AND METHOD - An average current value that is the average value of current values is found by connecting a detection resistor in parallel to two terminals that are the object of measurement, measuring the current value that flows in the detection resistor, and subjecting the current value to time-quadrature, and further, dividing the current value that follows integration by the integration time. The average current value is converted to a digital signal and sent to an arithmetic means (processor). The arithmetic means calculates the voltage value across the two terminals from the average current value and the resistance value of the detection resistor. | 03-14-2013 |
20130065136 | LITHIUM ION SECONDARY BATTERY - A lithium ion secondary battery which meets the requirement [1] of satisfying the formulae (a) to (c) or the requirement [2] of satisfying the formulae (b), (d), and (e): (a) 5≦A≦25, (b) 10≦B≦60, (c) 40≦2A+B≦90, (d) 0.2≦C≦1.2, and (e) −80 200C<3B≦150, wherein A (μm) represents an average particle size of a positive electrode active material; B (vol. %) represents a volume concentration of a fluorinated ether in a nonaqueous electrolyte solution; and C (m | 03-14-2013 |
20130061461 | MANUFACTURING METHOD FOR FILM-COVERED ELECTRICAL DEVICE - In a vacuum container ( | 03-14-2013 |
20130040182 | STACKED SECONDARY CELL - A stacked secondary cell suppresses heat contraction of the opening of a sack-shaped separator even in a high-temperature environment and prevents the occurrence of short circuits between the stacked electrodes. In the disclosed stacked secondary cell, positive electrodes ( | 02-14-2013 |
20130029218 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery comprising positive and negative electrodes capable of absorbing and desorbing lithium ions; a nonaqueous electrolytic solution; and a separator provided between the positive electrode and the negative electrode. The negative electrode comprises a negative electrode active material layer containing at least a styrene polymer as a binder in a content of 0.3 to 8.0 mass % based on the total mass of the negative electrode active material layer. The nonaqueous electrolytic solution contains at least a cyclic sulfonic acid ester including at least two sulfonyl groups in a content of 0.002 to 5.0 mass % based on the total mass of the nonaqueous electrolytic solution. | 01-31-2013 |
20130029198 | BATTERY UNIT AND POWER SUPPLY DEVICE - Disclosed is a battery unit that includes: a plurality of laminate batteries ( | 01-31-2013 |
20130011747 | LITHIUM ION SECONDARY BATTERY - There is provided a lithium ion secondary battery excellent in cycle characteristics in which the conductivity of an electrode using a graphite material which is less deformed and oriented by pressurization is improved. A negative electrode mixture which includes at least a negative electrode active material comprising graphite as a main component, a binder, and a conductive aid has a ratio of a peak intensity of a (002) plane to a peak intensity of a (110) plane in an X-ray diffraction spectrum of 30 or more and 70 or less, the spectrum being measured after the negative electrode mixture is pressed at 98 MPa (1000 kgf/cm | 01-10-2013 |
20120321962 | POLYMER SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME - There is provided a polymer secondary battery using silicon and silicon oxide as a negative electrode active material that shows a high capacity retention rate also when a charge and discharge cycle is repeated. A polymer secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a polymer-containing gel electrolyte, wherein the negative electrode includes silicon and silicon oxide as a negative electrode active material, and the polymer-containing gel electrolyte is present in voids formed by fine division of particles of the negative electrode active material. | 12-20-2012 |
20120321932 | LAMINATION TYPE SECONDARY BATTERIES - The present invention provides a lamination type secondary battery in which separators are prevented from becoming wrinkled and are free from laminating dislocation. An aspect of the present invention is a lamination type secondary battery in which a plurality of planar positive electrodes ( | 12-20-2012 |
20120301795 | NONAQUEOUS ELECTROLYTE SOLUTION, AND LITHIUM ION SECONDARY BATTERY HAVING THE SAME - The exemplary embodiment has an object to provide a nonaqueous electrolyte solution having a flame retardancy over a long period and having a good capacity maintenance rate. The exemplary embodiment is a nonaqueous electrolyte solution containing a lithium salt, at least one oxo-acid ester derivative of phosphorus selected from compounds represented by a predetermined formula, and at least one disulfonate ester selected from a cyclic disulfonate ester and a linear disulfonate ester represented by the predetermined formulae. | 11-29-2012 |
20120301791 | LAMINATED SECONDARY BATTERY - The present invention aims at providing a laminated secondary battery in which no short circuit occurs even if an electrode sheet is not covered with an insulating resin. The present invention provides a laminated secondary battery in which positive electrode sheet | 11-29-2012 |
20120293112 | BATTERY MODULE CONTROL SYSTEM AND BATTERY MODULE CONTROL METHOD - In order to provide a battery module control system able to reuse an arbitrary secondary battery module through a simple, inexpensive system, the present invention includes: a plurality of battery modules that are connected to each other in parallel; switch circuits that are provided on charge and discharge routes of a plurality of the battery modules; an average impedance value calculation section (control section) that calculates average impedance values of a plurality of the battery modules; a maximum allowable charge-and-discharge rate input section (input section) that inputs maximum allowable charge-and-discharge rates of a plurality of the battery modules; an allowable voltage difference calculation section (control section) that calculates allowable voltage differences of a plurality of the battery modules on the basis of the average impedance values calculated by the average impedance value calculation section and the maximum allowable charge-and-discharge rates input by the maximum allowable charge-and-discharge rate input section; a common voltage detection section (control section) that detects a voltage of a common charge and discharge route of a plurality of the battery modules; and a plurality of voltage detection sections (control section) that detect voltages of a plurality of the battery modules, wherein, when a difference between the voltage detected by the common voltage detection section and the voltage detected by the voltage detection section corresponding to a predetermined battery module is greater than an allowable voltage difference of the predetermined battery module, a switch circuit provided on a charge and discharge route of the predetermined battery module is so controlled as to be turned OFF. | 11-22-2012 |
20120288769 | GEL ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY HAVING THE SAME - Disclosed is a highly safe lithium ion secondary battery which has good life characteristics. Also disclosed is a gel electrolyte for a lithium ion secondary battery, which contains a lithium salt, a copolymer of specific monomers, a specific compound that has a phosphazene structure, and at least one compound selected from among specific cyclic disulfonic acid esters, specific chain disulfonic acid esters and specific sultone compounds. | 11-15-2012 |
20120249075 | SECONDARY BATTERY VOLTAGE DETECTING SYSTEM - A secondary battery voltage detecting system includes: a battery group in which lithium ion secondary batteries are connected in series; a charging and discharging switch that is connected between the battery group and an output terminal and performs charging and discharging; abnormality detectors that divide the batteries of the battery group into blocks and that detect battery voltages; a CPU that performs arithmetic processing of respective detection signals of protection elements including the abnormality detectors; first voltage level converters that make voltage references of the detection signals uniform between the protection elements and the CPU; and second voltage level converters connected between the abnormality detectors and the first voltage level converters. The CPU outputs, at a time interval set in advance, a signal for causing the second voltage level converters to operate and electrically isolates or connects paths between the detectors and the first voltage level converters. | 10-04-2012 |
20120227253 | METHOD FOR MANUFACTURING LITHIUM ION SECONDARY BATTERY - There is provided a lithium ion secondary battery exhibiting a high capacity retention rate over a long period. There is also provided a method for manufacturing a lithium ion secondary battery including a positive electrode, a negative electrode containing a negative electrode active material layer containing a graphite, an aprotic electrolyte solution containing a sulfonate ester having at least two sulfonyl groups, and a packaging material including a laminate film involving the positive electrode, the negative electrode and the aprotic electrolyte solution, the method including: enclosing the positive electrode, the negative electrode and the aprotic electrolyte solution in the packaging material to fabricate a lithium ion secondary battery before pre-charge; pre-charging the lithium ion secondary battery before pre-charge to fabricate a lithium ion secondary battery after pre-charge; and opening the enclosure of the packaging material of the lithium ion secondary battery after pre-charge, thereafter vacuum sealing the packaging material, and regularly charging the lithium ion secondary battery after pre-charge, wherein the current for the pre-charge is 0.05 to 0.25 C, and the voltage thereof is 3.3 to 3.5 V. | 09-13-2012 |
20120219865 | NONAQUEOUS-TYPE ELECTROLYTE SOLUTION, AND DEVICE COMPRISING THE SAME - There are provided a nonaqueous-type electrolyte solution having high flame retardancy and a good capacity retention rate, and a device comprising the nonaqueous-type electrolyte solution. The nonaqueous-type electrolyte solution is used in a device comprising a positive electrode, a negative electrode and the nonaqueous-type electrolyte solution, and contains a lithium salt and a compound having a phosphazene structure, and further contains 0.05% by mass or more and 12.0% by mass or less of at least one disulfonate ester selected from a cyclic disulfonate ester and a chain disulfonate ester based on the total of the nonaqueous-type electrolyte solution. | 08-30-2012 |
20120183843 | SECONDARY BATTERY - An exemplary embodiment provides a lithium ion secondary battery using a high energy type anode, which enables long-life operation thereof. A secondary battery according to an exemplary embodiment comprises an electrode element in which a cathode and an anode are oppositely disposed, an electrolytic solution, and an outer packaging body which encloses the electrode element and the electrolytic solution inside; wherein the anode is formed by binding an anode active material, which comprises carbon material (a) that can absorb and desorb a lithium ion, metal (b) that can be alloyed with lithium, and metal oxide (c) that can absorb and desorb a lithium ion, to an anode collector with an anode binder; and wherein the electrolytic solution comprises a liquid medium which is hard to generate carbon dioxide at a concentration of 10 to 80 vol %. | 07-19-2012 |
20120183842 | SECONDARY BATTERY - An exemplary embodiment provides a lithium ion secondary battery using a high energy type anode, which enables long-life operation thereof. A secondary battery according to an exemplary embodiment comprises an electrode element in which a cathode and an anode are oppositely disposed, an electrolytic solution, and an outer packaging body which encloses the electrode element and the electrolytic solution inside; wherein the anode is formed by binding an anode active material, which comprises carbon material (a) that can absorb and desorb a lithium ion, metal (b) that can be alloyed with lithium, and metal oxide (c) that can absorb and desorb a lithium ion, to an anode collector with an anode binder; and wherein the electrolytic solution comprises a liquid medium which is hard to generate carbon dioxide at a concentration of 10 to 75 vol %. | 07-19-2012 |
20120177975 | STACKED BATTERY AND METHOD OF PRODUCING THE SAME - A stacked battery includes a square battery element in which a tabular positive electrode, a separator and a tabular negative electrode are laminated, wherein: one side of the battery element is a terminal connection section pulled-out surface, which is provided on both the positive and negative electrodes and where a plate-like positive-electrode terminal connection section and a plate-like negative-electrode terminal connection are both pulled out; projection surfaces, which are generated by vertically projecting the positive-electrode terminal connection section and the negative-electrode terminal connection section onto surfaces extending from the positive and negative electrodes, do not cross each other; a surface of the positive electrode and a surface of the negative electrode, which are facing each other, are different in area; each electrode is disposed so that an entire projection portion, which is generated by projecting the small-area electrode onto a surface of a large-area electrode that faces the small-area electrode, is positioned on the large-area electrode; on a separator, a bumping section is provided to limit movements of positive and negative electrodes as a positive-electrode end surface and a negative-electrode end surface hit the bumping section; and as for the bumping section, separators are joined by a crease or joining section of adjacent separators among separators disposed on electrode surfaces. | 07-12-2012 |
20120171527 | BATTERY MODULE - A battery module has following features, that are: a plurality of unit batteries, in which battery elements are sealed with a film casing material, is laminated and electrically connected in series or parallel, or in series and parallel, to make an assembled battery; and on a length-direction central portion of the assembled battery, at least one strip-shaped circular frame body is disposed. | 07-05-2012 |
20120156527 | ASSEMBLED BATTERY MODULE - Provided is an assembled battery module in which a plurality of laminated cells can be assembled within a short time. An assembled battery module comprising: a plurality of laminated cells | 06-21-2012 |
20120115037 | POLYMER GEL ELECTROLYTE AND POLYMER SECONDARY BATTERY USING SAME - The present invention provides a polymer gel electrolyte capable of inhibiting the cell expansion of a polymer secondary battery and improving the cycle characteristics and high-temperature storage characteristics of a polymer secondary battery. The present invention relates to a polymer gel electrolyte comprising an aprotic solvent; a supporting salt; a cyclic sulfonic acid ester which includes at least two sulfonyl groups; and a crosslinked polymer obtained by crosslinking a methacrylic acid ester polymer represented by general formula (1) below. In the general formula (1), n meets 180005-10-2012 | |
20120056597 | SECONDARY BATTERY PACK SYSTEM - To provide a secondary battery pack system that controls battery packs which are connected in parallel without requiring a complex system configuration, a secondary battery pack system of the present invention that supplies power to an electronic device includes a plurality of battery packs each having a controller, a main body side connection circuit which is provided on the electronic device side so as to be connected to the plurality of battery packs, and a main body side discharge control signal line which is provided in the main body side connection circuit. The main body side discharge control signal line and controllers of the plurality of battery packs are connected to each other. | 03-08-2012 |
20120025770 | SECONDARY BATTERY PACK - A secondary battery pack of the present invention includes a secondary battery block | 02-02-2012 |
20110293996 | STACKED SECONDARY BATTERY AND PRODUCTION METHOD THEREOF - In a stacked secondary battery, positive electrodes | 12-01-2011 |
20110244328 | NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME, AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - There is provided a negative electrode for a nonaqueous electrolyte secondary battery in which when a battery is formed, the energy density is high, and moreover, the decrease in charge and discharge capacity is small even if charge and discharge are repeated. By using silicon oxide particles having a particle diameter in a particular range as a starting raw material, and heating these particles in the range of 850° C. to 1050° C., Si microcrystals are deposited on the surfaces of the particles. Then, by performing doping of Li, a structure comprising a plurality of protrusions having height and cross-sectional area in a particular range is formed on the surfaces. The average value of the height of the above protrusions is 2% to 19% of the average particle diameter of the above lithium-containing silicon oxide particles. By using the lithium-containing silicon oxide particles obtained by the above means as a negative electrode active material, a negative electrode for a nonaqueous electrolyte secondary battery is fabricated. | 10-06-2011 |
20110195300 | STACKED LITHIUM ION SECONDARY BATTERY - A stacked lithium ion secondary battery is characterized in that: a positive terminal is taken out from positive electrodes of a battery element stack in which the positive electrodes and negative electrodes are stacked via separators; a negative terminal is taken out from the negative electrodes; the battery element stack, except the taken-out portions of the positive and negative terminals, is covered with a porous plastic film; and an opening of the battery element stack covered with the porous plastic film is sealed with a film-like covering material. | 08-11-2011 |
20110195298 | STACKED SECONDARY BATTERY - A stacked secondary battery having desirable characteristics against overcharging is provided. | 08-11-2011 |
20110171506 | SECONDARY BATTERY PACK - Provided is a secondary battery pack that determines, as for protection and controlling, the state of connection based on information input from external interfaces and switches a protection and control mode from one setting to another according to connection targets and situations. Accordingly, the secondary battery pack of the present invention includes a secondary battery block | 07-14-2011 |
20110169455 | MULTIPLE SERIES/MULTIPLE PARALLEL BATTERY PACK - Provided is a multiple series/multiple parallel battery pack which is capable of operating at a proper timing, and which, even if lead wires for voltage measurement extending from secondary batteries are short-circuited, gives no damage to the secondary batteries or lead wires. Thus, the multiple series/multiple parallel battery pack according to the present invention comprises a plurality of units which are connected in series and a control circuit for performing control by means of a charge stop signal and a discharge stop signal output from each of the units. Each of the units is provided with a plurality of secondary batteries | 07-14-2011 |
20110159379 | SECONDARY BATTERY - An object of this invention is to provide a highly safe secondary battery employing a non-flammable electrolyte solution. The secondary battery has a positive pole comprising an oxide for storing and releasing lithium ions, a negative pole comprising a carbon material for storing and releasing lithium ions, and an electrolyte solution. The electrolyte solution comprises 1.5 mol/L or more of a lithium salt, or 1.0 mol/L or more of a lithium salt and 20% by volume or more of a phosphate ester derivative. | 06-30-2011 |
20110115437 | BATTERY PACK - A battery pack includes a plurality of battery modules that house a plurality of unit cells in a case; and a protection circuit board that controls the charge and discharge of a plurality of the battery modules at once. The battery pack is highly flexible in series and parallel connection, high in assembly productivity and excellent in energy density. | 05-19-2011 |
20110070504 | SECONDARY BATTERY - This invention relates to a highly safe secondary battery. In the secondary battery of this invention, a positive electrode is formed of an oxide which adsorbs/desorbs lithium ions; a negative electrode is formed of a carbon material which adsorbs/desorbs lithium ions; and an electrolyte solution is formed of an ion liquid and a phosphoric acid ester derivative. Consequently, the secondary battery can be highly safe. Since a phosphate ester and an ion liquid are contained at the same time, high discharge capacity can be maintained even when the phosphate ester is used at a high concentration. | 03-24-2011 |
20110005050 | MANUFACTURING METHOD AND MANUFACTURING APPARATUS FOR FILM-COVERED ELECTRICAL DEVICE - In a vacuum container ( | 01-13-2011 |