H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 2/12 (2006.01)
Patent
CA 2246491
A safety valve element for batteries which can be stably and accurately burst at a prescribed pressure, especially at a low pressure, so as to release the internal pressure of a battery and can be manufactured easily. A battery incorporating such a safety valve element is also disclosed. The safety valve element comprises a metallic substrate (A) having a through hole (C) and metallic foil (B) which is provided on the substrate (A) so to close the hole (C). A battery provided with a safety valve element is also disclosed. A battery case cap with a safety valve is manufactured by forming the metallic substrate (A) after the hole (C) is formed through the substrate (A) and the foil (B) is press-joined to the substrate (A). A battery using such case cap is also disclosed.
L'invention concerne une soupape de sécurité pour un accumulateur qui peut éclater d'une manière prévisible à une pression donnée précise, en particulier à une pression basse, et libérer la pression interne de l'accumulateur. Cette soupape est facile à fabriquer. L'invention concerne, également, un accumulateur comprenant une telle soupape de sécurité. La soupape de sécurité comprend un substrat métallique (A) ayant un trou traversant (C) et une feuille métallique (B) qui est disposée sur le substrat (A), de manière à fermer le trou (C). L'invention concerne également un accumulateur portant une telle soupape de sécurité. On fabrique un capuchon pour boîtier d'accumulateur avec une soupape de sécurité en mettant en forme le substrat métallique (A) après avoir formé le trou (C) à travers le substrat (A) et en faisant adhérer par pression la feuille (B) au substrat (A). L'invention concerne enfin un accumulateur comprenant un tel capuchon.
Isobe Yoshihiko
Saijo Kinji
Takada Akiyoshi
Takagi Akira
Yoshida Kazuo
Fukuda Metal Foil & Powder Co. Ltd.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Toyo Kohan Co. Ltd.
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