Chemistry: electrical current producing apparatus – product – and – Plural concentric or single coiled electrode
Patent
1997-02-07
1999-12-28
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Plural concentric or single coiled electrode
429164, H01M 226
Patent
active
060079363
ABSTRACT:
A battery having a stable internal resistance with a small deviation of internal resistance, and capable of suppressing a change or elevation of internal resistance due to external impact is provided. The battery comprises a battery can having a conductivity, serving also as a negative terminal, and including an opening, a spiral electrode group disposed in the battery can, a positive plate and a negative plate wound around a separator, an electrolyte member disposed in the battery can, and a sealing member serving also as a positive terminal, disposed in the opening of the battery can through an electric insulating member. In the inner wall of the battery can, contacting with the negative electrode positioned on the outermost circumference of the plate group, plural linear bumps vertical to the bottom of the battery can are formed. The height of each linear bump of the plural linear bumps ranges from 0.05 mm to 0.25 mm, and the pitch of the linear bumps ranges from 0.5 mm to 10 mm. The negative electrode member comprises a metal core and a negative electrode material covering the surface of the metal core, and linear bumps are formed on the inner surface of the battery can, and the bumps are contact the surface of the negative electrode material.
REFERENCES:
patent: 3081367 (1963-03-01), Field et al.
patent: 4255500 (1981-03-01), Hooke
patent: 4259416 (1981-03-01), Hueda et al.
patent: 4553419 (1985-11-01), Goodman
patent: 4929519 (1990-05-01), Catotti
Aoki Ken'ichi
Asano Gota
Iwase Akira
Suzuki Norio
Tokumoto Tadahiro
Kalafut Stephen
Matsushita Electric - Industrial Co., Ltd.
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