| 摘要 |
PROBLEM TO BE SOLVED: To arrange that, while utilizing a merit of a cylindrical nickel-hydrogen storage battery which has a superior productivity, the battery is made suitable for back-up usage by suppressing a peculiar problem (deterioration due to heat storage in the vicinity of center part) in the case of increased capacitance. SOLUTION: The cylindrical nickel-hydrogen storage battery is composed of an electrode plate group that is composed by winding around a positive electrode plate containing nickel hydroxide and Yb compound and a negative electrode plate containing hydrogen storage alloy via a separator and housed in a cylindrical metal can. Yb compound content of the positive electrode plate in the vicinity of a winding core of the electrode group is arranged to be larger than the Yb compound content in other parts of the positive electrode plate. COPYRIGHT: (C)2008,JPO&INPIT
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