Battery having air electrode and biased lever gasket
View Patent ↗A fluid consuming battery and method are provided for reducing electrode doming and providing an adequate sealed closure to the battery housing. The battery includes a cell housing having first and second housing components and at least one fluid entry port through a side of the cell housing for the passage of a fluid. The battery also has a gasket disposed between the first and second housing components. A first electrode is disposed within the cell housing in electrical contact with the first housing component and a second air electrode is provided in an electrode assembly disposed within the cell housing in electrical contact with the second housing component. The electrode assembly includes a first peripheral portion that is pre-compressed relative to a middle portion. The gasket has first and second extensions that bias against interior surfaces, and the second extension is radially inwards of an angled outward recess in the can.
1. A battery comprising:
a cell housing comprising a first housing component and a second housing component, said housing having at least one fluid entry port through the cell housing for the passage of a fluid into the cell housing;
a first electrode disposed within the cell housing in electrical contact with the first housing component;
an electrode assembly comprising a second, fluid consuming electrode disposed within the cell housing in electrical contact with the second housing component; and
a gasket disposed between the first and second housing components, said gasket comprising an outer upstanding wall, a base wall, and first and second inner extensions extending such that the first inner extension is in biased contact with the first housing component and the second inner extension is in biased contact with the electrode assembly, and the first and second inner extensions in a non-deflected state generally extend at an angle in the range of ninety-five to one hundred thirty-five degrees (95° to 135°) relative to each other.
2. The battery as defined in claim 1 , wherein the first and second inner extensions in a non-deflected state generally extend at an angle greater than 90 degrees relative to each other.
3. The battery as defined in claim 1 , wherein the first inner extension of the gasket is compressed against an inside surface of the first housing component, and the second inner extension of the gasket is compressed against the electrode assembly.
4. The battery as defined in claim 1 further comprising a separator disposed between the first and second electrodes.
5. A battery comprising:
a cell housing comprising a first housing component and a second housing component, said housing having at least one fluid entry port through the cell housing for the passage of a fluid into the cell housing;
a first electrode disposed within the cell housing in electrical contact with the first housing component;
an electrode assembly comprising a second, fluid consuming electrode disposed within the cell housing in electrical contact with the second housing component; and
a gasket disposed between the first and second housing components, said gasket comprising an outer upstanding wall, a base wall, and first and second inner walls extending such that the first inner wall is in biased contact with the first housing component and the second inner wall is in biased contact with the electrode assembly, and the first and second inner walls in a non-deflected state generally extend at an angle in the range of ninety-five to one hundred thirty-five degrees (95° to 135°) relative to each other, wherein the second housing component comprises a bottom wall with a central outward recess and a transition between the central recess and a peripheral portion, and wherein the second inner wall has a surface extending radially inward from a radially outermost point of the transition such that the electrode assembly is biased toward the recess in the second housing component.
6. The battery as defined in claim 5 , wherein the second inner wall surface extends radially inward of the radially outermost point of the transition by a distance greater than 0.127 millimeter.
7. The battery as defined in claim 5 , wherein the transition comprises an outward angled surface extending from the recess to the peripheral portion of the second housing component bottom wall.
8. The battery as defined in claim 1 , wherein each of the first and second inner extensions has a terminal end.
9. The battery as defined in claim 1 , wherein the gasket comprises a change in thickness of the outer upstanding wall which provides a high compression region between the first and second housing members.
10. The battery as defined in claim 1 , wherein one of the first and second housing members is crimped toward the other housing member to compress the gasket to form a sealed closure.
11. The battery as defined in claim 9 , wherein the electrode assembly further comprises a pre-compressed portion formed in the vicinity of the crimped closure.
12. A battery comprising:
a cell housing comprising a first housing component and a second housing component, said housing having at least one fluid entry port through the cell housing for the passage of a fluid into the cell housing;
a first electrode disposed within the cell housing in electrical contact with the first housing component;
an electrode assembly comprising a second air electrode disposed within the cell housing in electrical contact with the second housing component; and
a gasket disposed between the first and second housing components, said gasket comprising an outer upstanding wall, a base wall, and first and second inner extensions extending from the base wall and having terminal ends, wherein the first and second inner extensions are compressed such that the first inner extension is in biased contact with the first housing component and the second inner extension is in biased contact with the electrode assembly, and the first and second inner extensions in a non-deflected state generally extend at an angle in the range of ninety-five to one hundred thirty-five degrees (95° to 135°) relative to each other.
13. The battery as defined in claim 12 , wherein the first and second inner extensions in a non-compressed state generally extend at an angle greater than 90 degrees relative to each other.
14. The battery as defined in claim 12 , wherein the first inner extension is compressed against an inside surface of the first housing component, and the second inner extension is compressed against the electrode assembly.
15. The battery as defined in claim 12 further comprising a separator disposed between the first and second electrodes.
16. A battery comprising:
a cell housing comprising a first housing component and a second housing component, said housing having at least one fluid entry port through the cell housing for the passage of a fluid into the cell housing;
a first electrode disposed within the cell housing in electrical contact with the first housing component;
an electrode assembly comprising a second air electrode disposed within the cell housing in electrical contact with the second housing component; and
a gasket disposed between the first and second housing components, said gasket comprising an outer upstanding wall, a base wall, and first and second inner walls extending from the base wall and having terminal ends, wherein the first and second inner extending walls are compressed such that the first inner wall is in biased contact with the first housing component and the second inner wall is in biased contact with the electrode assembly, and the first and second inner walls in a non-deflected state generally extend at an angle in the range of ninety-five to one hundred thirty-five degrees (95° to 135°) relative to each other, wherein the second housing component comprises a bottom wall with a central outward recess and a transition between the central recess and a peripheral portion, and wherein the second inner wall has a surface extending radially inward from a radially outermost point of the transition such that the electrode assembly is biased toward the recess in the second housing component.
17. The battery as defined in claim 16 , wherein the second inner wall surface extends radially inward of the radially outermost point of the transition by a distance greater than 0.127 millimeter.
18. The battery as defined in claim 16 , wherein the transition comprises an outward angled surface extending from the recess to the peripheral portion of the second housing component bottom wall.
19. The battery as defined in claim 12 , wherein the gasket comprises a change in thickness of the outer upstanding wall which provides a high compression region between the first and second housing members.
20. The battery as defined in claim 12 , wherein one of the first and second housing members is crimped toward the other housing member to compress the gasket to form a sealed closure.
21. The battery as defined in claim 12 , wherein the electrode assembly further comprises a pre-compressed portion formed in the vicinity of the crimped closure.