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Battery with a stack of bipolar individual battery cells

  • US 9,005,797 B2
  • Filed: 07/03/2010
  • Issued: 04/14/2015
  • Est. Priority Date: 07/31/2009
  • Status: Expired due to Fees
First Claim
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1. A battery comprising:

  • a stack of bipolar individual battery cells, wherein each of the individual battery cells comprisesan electrode stack; and

    two sheet metal covers bounding the individual battery cell at least in a stacking direction,wherein the electrode stack is connected to one of the sheet metal covers by at least one weld,wherein the sheet metal cover welded to the electrode stack or a sheet metal cover of an adjacent individual battery cell in contact with the sheet metal cover of the electrode stack is configured with a set-back region in a region of the at least one weld so that the sheet metal covers of adjacent individual battery cells do not have any contact in the region of the at least one weld,wherein the set-back region is larger than the at least one weld and encompasses the at least one weld,wherein the sheet metal covers and the electrode stack are welded together by pressure welding,whereinthe sheet metal cover welded to the electrode stack has a partially set back region only around the at least one weld, orthe sheet metal cover of the adjacent individual battery cell, which is in contact with the sheet metal cover welded to the electrode stack, has a partially set back region only in a region opposite to and around the at least one weld in the stacking direction.

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