H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 2/12 (2006.01) H01M 2/34 (2006.01) H01M 10/04 (2006.01)
Patent
CA 2318183
A closing member comprises a valve element formed of metal substrate on which a plurality of perforated openings are disposed along an endless circumference with equal intervals between them, and metal foil laminated to the inner surface of the metal substrate so as to close the perforated openings. When the internal pressure of a closed battery is elevated, portions of the narrow intervals of the metal substrate, which are deformable by a small force, are elongated so as to cause a portion of the metal substrate encircled by the plurality of perforated openings to be projected. The closing member having such structure is secured to the inner periphery of an open end portion of an outer container of the battery, which accommodates the electrode element consisting of a positive electrode, a negative electrode, and a separator, together with an electrolyte therein, so as to close the open end portion of the outer container.
L'invention porte sur un élément de batterie étanche qui, en cas d'élévation de température due à un court-circuit, à une surcharge, ou à une inversion de charge ne peut exploser, le courant étant immédiatement coupé et la pression interne, simultanément et rapidement relâchée, garantissant ainsi la sûreté et la fiabilité dudit élément. L'élément est muni d'un bouchon comportant une soupape (5) faite d'un substrat métallique percé de trous (3) à intervalle rapproché sur toute sa périphérie, et d'une feuille métallique (2) disposée sur la surface intérieure du substrat (1) et recouvrant lesdits trous (3) et dont la structure est telle que les intervalles de la plaque métallique, qui, même soumis à une force faible alors que la pression interne croit, se déforment et s'allongent en faisant saillir la partie entourée de trous (3). Le bouchon s'adapte au pourtour intérieur d'une ouverture pratiquée dans le boîtier (30) de l'élément dont il assure la fermeture. Ledit boîtier renferme des ensembles d'électrodes (plaque positive (32a), plaque négative (32c), séparateur (32b) baignant dans l'électrolyte.
Isobe Yoshihiko
Kawamura Hiroaki
Okamoto Hiroaki
Saijo Kinji
Sugimoto Yoshiyuki
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Toyo Kohan Co. Ltd.
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