Title:
ニッケル水素蓄電池およびその負極の製造方法
Document Type and Number:
Japanese Patent JP4654669
Kind Code:
B2
Abstract:
A nickel metal hydride rechargeable battery has a closed-end tubular container containing a spiral-shaped electrode assembly formed by winding a negative a positive electrode with a separator interposed therebetween such that the outermost periphery of the assembly is the negative electrode which is formed by disposing on a conductive substrate a mixture layer containing a hydrogen-absorption alloy. The positive electrode employs nickel hydroxide as an active material. In the nickel metal hydride rechargeable battery, the surface roughness of the outermost peripheral portion of the mixture layer of the negative electrode which contacts an inner side wall of the closed-end tubular container is 3.5 μM or more in terms of ten-point average roughness and is larger than the surface roughness of the other portion of the mixture layer. The reduction of oxygen gas during rapid charging is thereby facilitated without lowering the design capacity of the battery.
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Inventors:
Kazufumi Okawa
Murakami Tsuneyoshi
Kenichi Aoki
Hiroyuki Usui
Murakami Tsuneyoshi
Kenichi Aoki
Hiroyuki Usui
Application Number:
JP2004342204A
Publication Date:
March 23, 2011
Filing Date:
November 26, 2004
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H01M4/24; H01M4/26; H01M10/30
Domestic Patent References:
| JP2004296251A | ||||
| JP2002008645A | ||||
| JP5041209A |
Attorney, Agent or Firm:
Hiroki Naito
Daisuke Nagano
Kentaro Fujii
Daisuke Nagano
Kentaro Fujii