Prismatic battery housing
AssigneeDuracell Inc.
InventorsDavid C. Batson, John D. Sillesky, Richard M. Mank
Life of this patent
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Abstract
The invention features a prismatic battery with an electrically conductive housing comprising an elongated, prismatic can with an open end, and a housing cover pressed into the open end of the can and welded in place. The novel cover has an outer flange about its periphery, extending generally in the direction of extension of the sides of the can, which elastically deflects as the cover is pressed into the can to provide good contact for welding. The cover has two raised bumps forming internal pockets that are part of the internal volume of the cell. The bumps are also arranged to prevent rotation of the seal/vent assembly. One embodiment includes a plugged fill hole in one of the bumps. Corresponding methods of manufacture are also disclosed.
Claims17
A prismatic battery having an electrically conductive housing comprising
- a prismatic can having an open end defined between extending, opposing sides of the can;
- and
- a housing cover disposed between and sealed against the opposing sides at the open end of the can, the can and cover together enclosing a volume, the cover having an outer flange about its periphery, the flange when disposed between the opposing sides of the can extending in the direction of extension of the sides of the can and defining therewith a welded seam.
A method of constructing a battery with an electrically conductive prismatic battery housing, the method comprising
- pressing a housing cover into the open end of an elongated, prismatic can to enclose a volume, the open end being defined between extending, opposing sides of the can, the cover having an outer flange about its periphery, the flange when pressed into the can extending in the direction of extension and defining therewith a seam, the cover having a raised portion defining therein a pocket in hydraulic communication with the enclosed volume;
- and
- welding the seam to seal the cover to the can.
Dependencies are inferred from the claim text.