| US 7,572,545 B2 | ||
| Battery can having vent and asymmetric welded cover | ||
| R. Justin Begg, Brunswick, Ohio (US); and Robert E. Ray, Strongsville, Ohio (US) | ||
| Assigned to Everyready Battery Company, Inc., St. Louis, Mo. (US) | ||
| Filed on May 24, 2006, as Appl. No. 11/439,781. | ||
| Prior Publication US 2007/0275293 A1, Nov. 29, 2007 | ||
| Int. Cl. H01M 2/12 (2006.01); H01M 2/08 (2006.01); B65D 51/16 (2006.01) | ||
| U.S. Cl. 429—82 [429/176; 220/203.08] | 23 Claims |
| 1. An electrochemical cell comprising:
a container having a first end, a second end, a side wall extending between the first and second ends, and an end wall extending
across the first end;
a positive electrode disposed in said container;
a negative electrode disposed in said container;
an aqueous alkaline electrolyte disposed in said container;
a pressure relief vent mechanism formed in said container for releasing internal pressure from within said container when
the internal pressure becomes excessive; and
a cover welded onto the end wall of the container and extending over said pressure relief vent mechanism, said cover including
a peripheral flange welded via at least three welds to said end wall of said container, wherein said at least three welds
are positioned such that an angle between two adjacent welds is greater than 120°.
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