A subject for the invention is to improve the cycle characteristics of a high-capacity secondary battery containing an active material packed at a high density, by using a particulate active material having a low aspect ratio. The invention relates to a nonaqueous-electrolyte secondary battery comprising a negative electrode and a positive electrode each capable of occluding/releasing lithium, a separator, and a nonaqueous electrolyte solution comprising a nonaqueous solvent and a lithium salt, characterized in that the separator comprises a porous film made of a thermoplastic resin containing an inorganic filler, and at least either of the following is satisfied: the active material contained in the negative electrode is a particulate active material having an aspect ratio of from 1.02 to 3; and the active material contained in the positive electrode is a particulate active material having an aspect ratio of from 1.02 to 2.2.

Nonaqueous electrolyte secondary battery

An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge/discharge characteristics, discharge load characteristics, etc The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and/or a difluorophosphate; and further a compound having a specific chemical structure or specific properties

Nonaqueous electrolyte for secondary battery and nonaqueous-electrolyte secondary battery employing the same

The present invention relates to a nonaqueous electrolyte solution comprising a lithium salt and a nonaqueous organic solvent, wherein the nonaqueous electrolyte solution comprises a specific sulfonic acid ester

Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

According to one embodiment, a secondary battery device includes a secondary battery cell (14), a case (12) configured to accommodate the secondary battery cell, and foam coating layers (40, 50) sandwiched between an outer surface of the secondary battery cell and an inner surface of the case and configured to hold the secondary battery cell.

Secondary battery device

A control system for an energy storage system located behind a utility meter uses a unique, feedback-based, communication and control method to reliably and efficiently maximize economic return of the energy storage system. Operating parameters for the energy storage system are calculated at an external, centralized data center, and are selected to prevent electrical power demand of an electric load location from exceeding a specified set-point by discharging energy storage devices, such as DC batteries, through a bidirectional energy converter during peak demand events. The control system can operate autonomously in the case of a communications failure.

Method and apparatus for delivering power using external data

PROBLEM TO BE SOLVED: To effectively perform the output to a power system as the whole hybrid distributed power system, by making effective use of the quantity of power of a storage unit, in the region of residual capacity where a storage unit does not fall in overcharge or overdischarge, by performing the control of placing priority on the power supply to the system for the purpose of protection of the storage device. SOLUTION: This is a power storage device 1 which supplies a power system 4 with power so as to suppress the output ripple of a distributed power source 2, being connected between the distributed power source 2 and the power system 4. The power storage device is equipped with a power conversion mechanism 12 which performs the charge and discharge of an accumulator 11, on the basis of the converter power command given from a controller 13. The controller 13 possesses a charge/discharge command setter 23 which sets the charge/discharge command to bring the charge state of the accumulator 11 close to the target charge state, and a converter power command setter 24 which sets a converter power command on the basis of the charge/discharge command set by the charge/discharge command setter 23, the target supply power to be supplied to the power system 4, and the output power of the distributed power source 2. COPYRIGHT: (C)2006,JPO&NCIPI

Power storage device and hybrid distributed power system

PROBLEM TO BE SOLVED: To provide an electric power storage system of which manufacturing cost can be reduced greatly. SOLUTION: This is an electric power storage system 1 which has in a case 6 an electric chamber 4 in which a power conversion device and a protection circuit are housed and a battery chamber 5 in which a plurality of modules of batteries housing at least one secondary battery in a case are housed. At least one suction port 12 and at least one exhaust port are provided in the above case 6, and at least one passage R for communicating the suction port 12 and the exhaust port is formed in the case 6, and furthermore at least one fan 15 is installed in each passage R. COPYRIGHT: (C)2005,JPO&NCIPI

Electric power storage system

PROBLEM TO BE SOLVED: To provide an electrolytic solution, an electrode, and a lithium secondary battery for a lithium secondary battery superior in cycle stability and with no possibility of liquid leakage, and their manufacturing method. SOLUTION: The electrolytic solution in which isocyanate compound of a low molecular weight such as hexamethylene diisocyanate is blended, and an electrode active material are made to be reacted by a chemical method or an electrochemical method, and making a reaction layer of the low molecular weight isocyanate form on an active material surface, thereby the lithium secondary battery superior in durability is provided. A blending amount of the isocyanate compound to the electrolytic solution is within a range of 0.01 wt% to 5 wt%. After the reaction layer of the isocyanate is formed on the active material surface, or simultaneously when the reaction layer is formed, by gelatinizing the electrolytic solution in which isocyanate, polyol, and urethane formation catalyst are blended, gel electrolyte is formed. COPYRIGHT: (C)2005,JPO&NCIPI

Electrolytic solution and electrode for lithium secondary battery, lithium secondary battery, and manufacturing method of those

PROBLEM TO BE SOLVED: To provide a technique for controlling a current flowing into each serial cell group at low cost, while securing system reliability, concerning a battery pack which employs a parallel structure of serial cell groups SOLUTION: A battery pack system 10 includes a plurality of serial cell units 1A to 1Z connected in parallel mutually, and control units 9A to 9Z Each of the plurality of serial cell units 1A to 1Z has a plurality of cells 4 connected in series and current control elements 5A to 5Z The control units 9A to 9Z supply current control signals 6A to 6Z to each of the current control elements 5A to 5Z Discrete elements are used as the current control elements 5A to 5Z, wherein current flowing in the current control elements changes according to signal levels of the current control signals 6A to 6Z COPYRIGHT: (C)2011,JPO&INPIT

Battery pack system

PROBLEM TO BE SOLVED: To provide a secondary battery which is equipped with an inner short- circuit detecting device that detects generation of an inner short-circuit in the secondary battery and which is equipped with an inner energy absorber that guides an inner energy to outside of the battery at a time of detecting the inner short-circuit. SOLUTION: The secondary battery 10A is constituted by installing an inner short-circuit detecting device 20 which is equipped with a detecting means that detects a condition change of the inner short-circuit and a judging part that judges the generation of the inner short-circuit from a detected signal of the detecting means and that outputs a detected signal of an inner short-circuit, and an inner energy absorber which is equipped with a bypass wiring that couples a positive electrode terminal 5 and a negative electrode terminal 6 of the secondary battery and an energy absorbing part that is connected via a normally opened switching means in the bypass wiring.

克明小林

Papers

Power storage device and hybrid distributed power system

Electric power storage system

Electrolytic solution and electrode for lithium secondary battery, lithium secondary battery, and manufacturing method of those

Battery pack system

Inner short-circuit detecting device, inner energy absorber and secondary battery

克明 小林

Papers

Power storage device and hybrid distributed power system

Electric power storage system

Electrolytic solution and electrode for lithium secondary battery, lithium secondary battery, and manufacturing method of those

Battery pack system

Inner short-circuit detecting device, inner energy absorber and secondary battery

克明小林