Battery cell comprising a covering plate fixed in a form-fitting manner in a housing
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United States of America Patent
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Nov 20, 2018
Grant Date -
Sep 3, 2015
app pub date -
Aug 2, 2013
filing date -
Sep 26, 2012
priority date (Note) -
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Abstract
The invention relates to a battery cell (1), in particular a lithium ion battery cell, in which a wrapping element, two current collectors and an electrolyte are accommodated in a housing (11). The prismatically formed housing (11) comprises a container that is open towards the upper side and a cover arrangement having a cover plate (23) closing the opening (14) of said container. The cover plate (23) and a wall of the container (13) are designed in the region of the opening (14) in such a manner that the wall prevents a movement of the cover plate (23) from the opening by means of a positive connection. An elastically compressible sealing element (31) is provided between the wall and a wall surface of an outer edge (27) of the cover plate directed towards said wall, in order to seal the cover plate (23) hermetically against the container (13). On the basis of the positive connection between the cover plate (23) and the edge of the container (13) a sealing effect can hereby likewise increase while the inner pressure in the housing (11) increases. The invention relates to a battery cell (1), in which it can be prevented that the cover plate (23) must be welded to the container (13).
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