| NEC ENERGY DEVICES, LTD. Patent applications |
| Patent application number | Title | Published |
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| 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 1800| 05-10-2012 | |
| 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 |
