Battery
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United States of America Patent
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Feb 1, 2011
Grant Date -
Sep 27, 2007
app pub date -
Feb 9, 2007
filing date -
Mar 27, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A battery is adapted such that a nickel hydroxide particle group constituted of a number of nickel hydroxide particles filled in a void part of a positive electrode substrate contains, at a ratio of 15 wt % or less, small-diameter nickel hydroxide particles each having a particle diameter of 5 μm or less. The positive electrode substrate is configured such that a front-surface-side nickel layer and a back-surface-side nickel layer are made larger in thickness than a middle nickel layer, and an average thickness B of either the front-surface-side nickel layer or the back-surface-side nickel layer, which is thicker one, and an average thickness C of the middle nickel layer satisfy a relation of C/B≧0.6.
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