Closure vent seal and assembly
First Claim
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1. A vent closure seal assembly for an electrochemical cell container, said assembly comprising:
- a closure cup having an aperture to allow electrochemical reaction gas to flow therethrough;
a contact member having a defined peripheral shape;
a rupturable vent fixed between the closure cup and the contact member to selectively control the flow electrochemical reaction gas through the assembly, said rupturable vent having a peripheral shape that, is not the same as the defined peripheral shape of the contact member;
wherein a first diameter of the rupturable vent is equal to a corresponding first diameter of the defined peripheral shape of the contact member along a first common planar axis;
wherein a second diameter of the rupturable vent is greater than a corresponding second diameter of the defined peripheral shape of the contact member along a second common planar axis;
wherein the first and second common planar axes intersect at a center point of said contact member; and
wherein the vent is not rectangular in shape and a plurality of planar protrusions are integrated along a peripheral edge of the rupturable vent.
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Abstract
A closure assembly and rupturable vent seal adapted for use in an electrochemical battery cell is disclosed. The vent seal includes a series of peripheral projections that can be folded to insure proper sealing of the vent without wrinkles or overlapping folded portions. Methods of accomplishing the invention are also contemplated.
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Citations
13 Claims
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1. A vent closure seal assembly for an electrochemical cell container, said assembly comprising:
- a closure cup having an aperture to allow electrochemical reaction gas to flow therethrough;
a contact member having a defined peripheral shape; a rupturable vent fixed between the closure cup and the contact member to selectively control the flow electrochemical reaction gas through the assembly, said rupturable vent having a peripheral shape that, is not the same as the defined peripheral shape of the contact member; wherein a first diameter of the rupturable vent is equal to a corresponding first diameter of the defined peripheral shape of the contact member along a first common planar axis; wherein a second diameter of the rupturable vent is greater than a corresponding second diameter of the defined peripheral shape of the contact member along a second common planar axis; wherein the first and second common planar axes intersect at a center point of said contact member; and wherein the vent is not rectangular in shape and a plurality of planar protrusions are integrated along a peripheral edge of the rupturable vent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- a closure cup having an aperture to allow electrochemical reaction gas to flow therethrough;
Specification