Title:
【発明の名称】円筒密閉型ニッケル蓄電池
Document Type and Number:
Japanese Patent JP3143109
Kind Code:
B2
Abstract:
PURPOSE:To smooth the temperature distribution of a battery and improve the charge efficiency by providing such a constitution that the oxygen gas absorptive performance of a negative electrode is more excellent in the outer circumferential side than in the central side, in an electrode group in which a positive electrode and the negative electrode are spirally wound through a separator. CONSTITUTION:Nickel positive electrode 1 and negative electrode 2 are spirally wound through a separator 3 to form an electrode group. A hydrogen storage alloy which is inferior in oxygen gas absorptive performance and has a small average grain size, is used on the central side of the negative electrode, while a hydrogen storage alloy which is excellent in oxygen gas absorptive performance and has a large average grain size, is used on the outer circumferential side. Hence, exothermic reaction is mainly caused on the outer circumferential side easy to release heat and reduced on the central side difficult to release heat. Thus, the temperature distribution in the battery is smoothed, the charge efficiency of the positive electrode is improved, and a reduction in capacity can be suppressed. By reducing the temperature in the battery, the deterioration of the negative electrode is suppressed, and cycle characteristic is improved.
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Inventors:
Nobuhiro Furukawa
Kazuo Moriwaki
Tadashi Ise
Reizo Maeda
Kazuo Moriwaki
Tadashi Ise
Reizo Maeda
Application Number:
JP6342890A
Publication Date:
March 07, 2001
Filing Date:
March 14, 1990
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M10/34; H01M4/24; H01M4/32; H01M10/28; H01M10/30; (IPC1-7): H01M10/30; H01M4/24; H01M4/32; H01M10/28
Domestic Patent References:
| JP60130053A | ||||
| JP5578465A | ||||
| JP6174267A |
Attorney, Agent or Firm:
Shiro Nakajima