Secondary battery having an improved safety

Details Secondary battery having an improved safety Secondary battery having an improved safety

H - Electricity

01

M

H01M 2/10 (2006.01)

Patent

CA 2583299

Disclosed is a secondary battery. The secondary battery includes a battery can serving as a positive electrode terminal or a negative electrode terminal of the secondary battery, an electrically conductive substrate provided at an outer portion of the battery can, and a nonconductive film interposed between the battery can and the electrically conductive substrate in order to insulate the electrically conductive substrate from the battery can, wherein the electrically conductive substrate is electrically connected to an electrode terminal having polarity opposite to that of the battery can. Safety of the secondary battery is ensured even if the secondary battery is subject to external parameters, such as penetration of a sharp tool (e.g. a nail or a drill tip), pressing force of a tool (e.g. a nipper), external impact, and exposure to the high temperature.

La présente invention se rapporte à un accumulateur. Cet accumulateur comprend un boîtier batterie servant de borne électrode positive ou de borne électrode négative de l'accumulateur, un substrat électriquement conducteur situé au niveau d'une partie externe du boîtier de batterie, et un film non conducteur intercalé entre le boîtier de batterie et le substrat électriquement conducteur de manière à isoler le substrat électriquement conducteur du boîtier de batterie, ledit substrat électriquement conducteur étant électriquement raccordé à une borne électrode présentant une polarité opposée à celle du boîtier de batterie. La sécurité de cet accumulateur est assurée même lorsque celui-ci est soumis à des conditions externes telles que la pénétration d'un outil pointu (par exemple un clou ou une potine de forage), la forme de pression d'un outil (par exemple une pince), un choc externe ainsi que l'exposition à une température élevée.

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