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    NONAQUEOUS ELECTROLYTE CELL
    5.
    发明专利
    NONAQUEOUS ELECTROLYTE CELL 失效

    公开(公告)号：JPH0251852A

    公开(公告)日：1990-02-21

    申请号：JP20282988

    申请日：1988-08-15

    Applicant: BRIDGESTONE CORP

    Inventor： MASUDA YOSHITOMO ,  OGAWA MASAO ,  SUZUKI KINYA ,  ARAI KATSUHIKO ,  FUSE TADASHI ,  AMANO TETSURO

    IPC: H01M2/22 ,  H01M2/26 ,  H01M4/64 ,  H01M6/16

    Abstract: PURPOSE:To prevent a battery from deteriorating in its performance, due to a corrosion at a welded part, and make its preservation characteristic excellent by coating a welded part of a current collecting body and a positive electrode of a battery case with material insoluble in an electrolyte. CONSTITUTION:To retain good conducting state for a long time by making an electrical connection between a positive electrode current collecting body 4 and the positive electrode 1 of a battery case by means of weld, while welded part is coated with a material which is insoluble in an electrolyte. Accordingly, at a welded part where a corrosion an a dissolution phenomenon is fierce, a corrosion of structure material for a metal positive electrode side and a penetration of a metal component in an electrolyte, that could cause deterioration of a battery performance, can be prevented as much as possible, thus excellent cycle characteristic and self-discharge characteristic are retained for a long period of time without increasing its internal resistance.

    LITHIUM BATTERY
    6.
    发明专利
    LITHIUM BATTERY 失效

    公开(公告)号：JPH01255157A

    公开(公告)日：1989-10-12

    申请号：JP8366088

    申请日：1988-04-05

    Applicant: BRIDGESTONE CORP

    Inventor： SUZUKI KINYA ,  OGAWA MASAO ,  ARAI KATSUHIKO ,  MASUDA YOSHITOMO ,  FUSE TADASHI ,  AMANO TETSURO

    IPC: H01M2/02 ,  H01M2/04 ,  H01M2/12 ,  H01M4/02 ,  H01M4/137 ,  H01M4/40 ,  H01M4/60 ,  H01M4/62 ,  H01M4/64 ,  H01M4/66 ,  H01M4/74 ,  H01M6/10 ,  H01M10/05

    Abstract: PURPOSE:To provide a lithium battery with high sealing performance at normal time and sure actuation in the event of abnormality and prevent electrodes from being exposed unnecessarily during and after actuation by furnishing a gas bleeder valve consisting of a gas bleeder piece and a crown lid at a battery jar which accommodates positive electrodes, negative electrodes, and electrolyte. CONSTITUTION:A battery jar, in which positive electrodes 4, negative electrodes 5 containing lithium, and electrolyte are accommodated, is provided with a gas bleeder hole 7, and the base end of a cylindrical gas bleeder piece 9 is fixed to the battery jar in such a way as covering this gas bleeder hole 7 in the condition that the hollow part 15 of the gas bleeder piece is in communication with the gas bleeder hole 7. The periphery of the gas bleeder piece 9 is put in pressure contact by a ring-shaped inward projection 20 formed by pressing specified points on the periphery of a crown lid 13, in the form of a cylinder with head, inward along the circumference, and the crown lid 13 is fixed to the gas bleeder piece 9 while covering the opening at the tip of its hollow part. This provides high sealing performance at normal time and sure exhaustion of gas to outside the battery in the event of abnormal rise of the battery internal pressure associate with gas generation, and the electrodes will not be exposed unnecessarily during and after exhaustion of the gas.

    SECONDARY CELL
    9.
    发明专利
    SECONDARY CELL 失效

    公开(公告)号：JPS62195861A

    公开(公告)日：1987-08-28

    申请号：JP3623286

    申请日：1986-02-20

    Applicant: BRIDGESTONE CORP

    Inventor： FUSE TADASHI ,  OGAWA MASAO ,  MASUDA YOSHITOMO ,  OFUKU EIJI ,  FUJIO RYOTA

    IPC: H01M10/05 ,  H01M4/40 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/40

    Abstract: PURPOSE:To contrive to improve the discharge capacity or the energy density and to elongate the life time of the charge and discharge cycles of a cell by using an organic electro-conductive high molecular material as the positive electrode and making the concentration of the electrolyte in the electrolytic solution higher than 1mol/l and lower than 6mol/l. CONSTITUTION:An organic electro-conductive high molecular material is used for the positive electrode of a cell and the concentration of the electrolyte in the electrolytic solution is made higher than 1mol/l and lower than 6mol/l. As for the organic electro-conductive high molecular material e.g. a polymer of benzene and its derivatives such as polyacetylene, polyaniline and so on and a polymer of hetero- or polynuclear aromatic compounds such as polypyridine, naphthalene and so on can be used. Especially polyaniline obtained by electrolytic oxidation polymerization is produced with good adhesion to the positive electrode substrate at the time of electrolytic oxidation polymeriza tion, and moreover the anode substrate can be used as the collector or the vessel of the electrodes of the cell. Thereby a cell excellent in cell performance such as the discharge capacity, the energy density and the charge and discharge cycle life time and so on can be obtained.

    SECONDARY BATTERY
    10.
    发明专利
    SECONDARY BATTERY 失效

    公开(公告)号：JPS62188179A

    公开(公告)日：1987-08-17

    申请号：JP2888086

    申请日：1986-02-14

    Applicant: BRIDGESTONE CORP

    Inventor： MASUDA YOSHITOMO ,  FUSE TADASHI ,  OGAWA MASAO ,  OFUKU EIJI ,  FUJIO RYOTA

    IPC: H01M4/40 ,  H01M4/137 ,  H01M10/05 ,  H01M10/052

    Abstract: PURPOSE:To enhance durability in repeated charge-discharge in spite of small size using polyaniline as a positive active material, lithium alloy as a negative active material, and in addition, by limiting the effective amount of lithium polyaniline in a specified range. CONSTITUTION:In a lithium alloy used in a negative active materials of a secondary battery, the effective amount of lithium which participates in charge- discharge by electrochemically absorbing and desorbing ions is limited to 4X10 -170X10 mol, preferably to 4X10 -130X10 mol per 1g of polyaniline serving as a positive active material. If the effective amount of lithium is less than 4X10 mol, charge current is increased with increase in the number of charge-discharge cycles, and discharge capacity is decreased, and polyaniline is dissolved. This secondary battery shows 1,000-2,000 charge-discharge cycles at a discharge capacity of 1mA, and is used for IC memory backup of personal computers.

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