Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means
Patent
1991-02-15
1992-07-07
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Sealed cell having gas prevention or elimation means
429134, 429146, 429225, 429245, H01M 1010
Patent
active
051282186
ABSTRACT:
A sealed lead-acid battery which includes a container accommodating an assembled element. The assembled element has at least one electrochemically formed positive plate having a grid of an antimony-free alloy, wherein the plate is made of porous active material. The assembled element also includes at least one electrochemically formed negative plate having a grid of an antimony-free lead alloy, wherein the plate is made of a porous active material. A separator, having a plurality of projections on one or both side thereof, is inserted between the positive and negative plates. A layer of powder is placed between the positive and negative plates and around the assembled element. The powder is composed of a closely packed powder, which is acid-resistant and hydrophilic, and has gas channels within its interior. The powder is immobilized with an acid-resistant porous layer placed above the powder, wherein the porous layer is permeable to gases and liquids, and impervious to particles of the powder. Sulfuric acid electrolyte is impregnated and retained within the positive and negative plates and the powder layer in a substantially necessary and sufficient amount for charging and discharging the battery.
REFERENCES:
patent: 1651226 (1927-11-01), Pearson
patent: 3177096 (1965-04-01), Jache
patent: 3402077 (1968-09-01), Kida et al.
patent: 3457112 (1969-07-01), Reber
patent: 3711332 (1973-01-01), Bestacky
patent: 3765942 (1973-10-01), Jache
patent: 3993507 (1976-11-01), Harding
patent: 4447508 (1984-05-01), Jensen
Patent Abstracts of Japan, vol. 9, No. 277 (E-355), Nov. 6, 1985, Yuasa Denki K.K.
Hatanaka Teruhiro
Hayashi Toshiaki
Kosai Masahiko
Omae Takao
Tokunaga Akio
Japan Storage Battery Co., Ltd.
Skapars Anthony
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