Safety vent for storage battery or cell
First Claim
1. A safety vent, sensitive to a predetermined temperature, for a battery including a metal container within which are arranged active materials forming respectively an anode and a cathode, said container being sealed at its upper portion by a hermetically sealed cover that is separated from the active materials by an insulating element and carries two contact terminals electrically connected to the anode and the cathode via connection means, said safety vent comprising at least one of the contact terminals formed at least partially by a rigid metal rod and mounted with an annular clearance in a tube, of which one portion of smaller diameter passes through the insulating element and the cover, of which a portion of larger diameter rests against an inner face of the insulating element, and an outer end of which is crimped onto the outer face of the cover, the clearance formed between the tube and the rod being sealed by a solid thermofusible composition having a melting point at said predetermined temperature.
1 Assignment
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Accused Products
Abstract
Safety vent for a battery, sensitive to an abnormal rise in temperature, closed by a cover (4), separated from the active materials by an insulating element (21) and carrying two contact terminals (7, 8) electrically connected to the electrodes via connection means (5, 6), wherein at least one of the contact terminals (7, 8) is formed at least partially by a rigid metal rod (30), mounted with an annular clearance (18) in a tube (11) of which one portion (11a) of smaller diameter passes through the insulating element (21) and the cover (4), and of which a portion (11b) of larger diameter rests on the inner face (21a) of the insulating element (21), the other end (13) thereof being crimped over the outer face (4b) of the cover (4) and in that the clearance (18) formed between the tube (11) and the rod (30) is sealed by a thermofusible composition (14).
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Citations
14 Claims
- 1. A safety vent, sensitive to a predetermined temperature, for a battery including a metal container within which are arranged active materials forming respectively an anode and a cathode, said container being sealed at its upper portion by a hermetically sealed cover that is separated from the active materials by an insulating element and carries two contact terminals electrically connected to the anode and the cathode via connection means, said safety vent comprising at least one of the contact terminals formed at least partially by a rigid metal rod and mounted with an annular clearance in a tube, of which one portion of smaller diameter passes through the insulating element and the cover, of which a portion of larger diameter rests against an inner face of the insulating element, and an outer end of which is crimped onto the outer face of the cover, the clearance formed between the tube and the rod being sealed by a solid thermofusible composition having a melting point at said predetermined temperature.
Specification