| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel-hydrogen secondary battery of low internal resistance in the battery and high reliability capable of conducting high-current discharge. SOLUTION: A collector sheet 15 of this nickel-hydrogen secondary battery is composed of a punched metal punched such that lines joining the center of three adjucent holes form sides 15A, 15B and 15C of an equilateral triangle, respectively. An electrode group is wound in the direction parallel to any one of the sides 15A, 15B and 15C. The end of a negative electrode carries current to a battery can through a collector plate welded with the end or directly carries current to the battery can.
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