Battery with pressure relief channel
A battery having an outer casing and an anode/cathode assembly within that casing, wherein the anode/cathode assembly includes plural anodes and cathodes and electrolyte therebetween. The battery has a pressure relief feature associated with the casing and a channel preservation element sufficiently rigid to preserve at least one gas passageway to the pressure relief feature under conditions of anode/cathode assembly warpage. Thus the gas in the passageway will not become impeded by anode/cathode assembly warpage.
1. A battery comprising:
an outer casing;
an anode/cathode assembly within the casing, the assembly including plural anodes and cathodes and electrolyte therebetween;
at least one pressure relief feature associated with the casing; and
a channel preservation element sufficiently rigid to preserve at least one gas passageway to the pressure relief feature under conditions of anode/cathode assembly warpage, wherein the channel preservation element is centrally disposed within the assembly; and
wherein the channel preservation element includes plural non-round channels adjacent to each other and/or closely juxtaposed to each other.
2. The battery of claim 1 , wherein the channel preservation element includes a mesh.
3. The battery of claim 1 , wherein a second channel preservation element includes at least one concavity or convexity formed in the outer casing.
4. The battery of claim 1 , wherein a second channel preservation element includes plural round channels.
5. The battery of claim 1 , wherein one or more of the plural non-rounded channels are formed as a channel selected from the group consisting of: a triangular channel, a rectangular channel, and/or a diamond-shaped channel.
6. A battery comprising:
a battery casing;
means for providing pressure relief from gas build up in the battery casing; and
means for ensuring that at least one gas passageway exists in the casing to the means for providing pressure relief;
wherein the means for providing pressure relief includes at least one pressure relief feature, and the means for ensuring includes at least one channel preservation element; and
wherein the channel preservation element includes plural non-round channels.
7. The battery of claim 6 , further comprising an anode/cathode assembly in the casing.
8. The battery of claim 6 , wherein the plural non-round channels are adjacent to each other and/or closely juxtaposed to each other.
9. The battery of claim 7 , wherein the channel preservation element is centrally disposed within the assembly.
10. The battery of claim 6 , wherein the channel preservation element includes a mesh.
11. The battery of claim 6 , wherein the channel preservation element includes at least one concavity or convexity formed in the outer casing.
12. A method for providing pressure relief from gas build up in a battery, comprising:
providing a channel preservation element sufficiently rigid to preserve at least one gas passageway under operating conditions in a battery; and
disposing the element centrally in the jelly roll such that the channel communicates with a pressure relief feature;
wherein the element includes plural non-round channels.
13. The method of claim 12 , wherein the channel preservation element is a mesh.
14. An apparatus comprising:
an outer casing;
an anode/cathode assembly within the casing, the assembly including plural anodes and cathodes and electrolyte therebetween;
at least one pressure relief feature associated with the casing; and
a channel preservation element sufficiently rigid to preserve at least one gas passageway to the pressure relief feature under conditions of anode/cathode assembly warpage;
wherein the channel preservation element includes plural non-round channels.
15. The apparatus of claim 14 , wherein the channel preservation element includes a mesh.
16. The apparatus of claim 14 , wherein a second channel preservation element includes at least one concavity or convexity formed in the outer casing.
17. The apparatus of claim 14 , wherein the plural non-round channels are adjacent to each other and/or closely juxtaposed to each other.