Rechargeable battery and heat treatment device
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 6, 2014
app pub date -
Mar 13, 2013
filing date -
Sep 6, 2012
priority date (Note) -
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Abstract
An embodiment of the present invention provides a rechargeable battery that prevents generation of a crack under the longitudinal compression condition by increasing an elongation ratio to a part of the bottom of the case to prevent an internal short-circuit. A rechargeable battery according to an exemplary embodiment of the present invention includes: a case receiving an electrode assembly; a cap plate covering an opening of the case; and an electrode terminal provided in the cap plate and electrically connected to the electrode assembly, the case includes side walls connected with each other and forming the opening in one side and a bottom connecting neighboring side walls at the opposite side of the opening for sealing, and the bottom a first elongation portion having a first elongation ratio and a second elongation portion having a second elongation ratio that is higher than the first elongation ratio.
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