| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel-hydrogen storage battery of which output power is not reduced but increased even if an area of an electrode plate is enlarged more than a prescribed size. SOLUTION: An electrode group of the nickel-hydrogen storage battery 4 is composed of an anode plate 8 containing non-water-soluble polymeric binder binding hydrogen storage alloy particle, having effective surface area per unit capacity of 70 cm2/Ah; a cathode plate 6 wound in swirl-shape together with the anode plate 8; and first and second separators 10a, 10b made of unwoven fabric of polyolefin based fiber, arranged between inner face and outer face of the cathode plate 6 and the anode plate 8 respectively. Preferably, at least one hydrophilic treatment selected from fluorine-gas treatment or the like is applied to the unwoven fabric of the first separator 10a, and sulfonation treatment is applied to the unwoven fabric of the second separator 10b. The porosity of the second separator 10b is larger than that of the first separator 10a. COPYRIGHT: (C)2007,JPO&INPIT
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