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Battery cell having improved thermal stability and middle or large-sized battery module employed with the same

  • US 9,343,713 B2
  • Filed: 10/22/2008
  • Issued: 05/17/2016
  • Est. Priority Date: 11/09/2007
  • Status: Active Grant
First Claim
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1. A battery cell comprising:

  • an electrode assembly of a cathode/separator/anode structure mounted in a central part of a battery case formed of a laminate sheet including a resin layer and a metal layer while the electrode assembly is connected to electrode terminals extruding out of the battery case;

    a sealing part at an outer circumferential end of the central part of the battery case, the sealing part formed by thermally welding upper and lower parts of the laminate sheet; and

    a sheet-type member (‘

    a thermally conductive sheet’

    ) to accelerate the dissipation of heat from the battery cell extending to the sealing part while the thermally conductive sheet partially covers the battery cell,wherein the thermally conductive sheet is formed of a metal plate which is bent according to an external shape of the battery cell to maximize a contact area between the metal plate and the battery cell,wherein the battery case is provided at at least one side sealing part thereof with heat exchange members,wherein the heat exchange members are thermally conductive members having a heat exchange medium channel through which a heat exchange medium flows, the heat exchange members comprising an upper heat exchange member contacting an upper surface of the sealing part and a lower heat exchange member contacting a lower surface of the sealing part, andwherein a combined height of the upper heat exchange member, lower heat exchange member and sealing part is equal to a height of the central part of the battery case.

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