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Battery cell of asymmetric structure and battery pack employed with the same

  • US 9,478,773 B2
  • Filed: 10/03/2014
  • Issued: 10/25/2016
  • Est. Priority Date: 03/16/2012
  • Status: Active Grant
First Claim
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1. A method of manufacturing a battery cell, the method comprising the steps of:

  • cutting a laminate sheet comprising a metal layer and a resin layer into an unfolded battery case form to prepare a battery case sheet;

    folding the battery case sheet with respect to a symmetrical axis to form a folded portion;

    applying external force to the folded portion from an inside to an outside of the folded portion to form a curved portion corresponding to a deflection part of one side of an asymmetric electrode assembly;

    applying external force to an inside of the battery case sheet to form a receiving part;

    placing the asymmetric electrode assembly having the deflection part at one side thereof in the receiving part;

    connecting electrode terminals with the electrode assembly, the electrode terminals being located opposite the folded portion; and

    hermetically sealing the battery case sheet, including sealing the area at the location of the electrode terminals, thereafter purging gas from the battery case at an unsealed location, and thereafter sealing the unsealed location.

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