Secondary battery
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United States of America Patent
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Dec 1, 2015
Grant Date -
May 29, 2014
app pub date -
Jun 7, 2012
filing date -
Aug 17, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a secondary battery including a battery cell having a cathode tab and an anode tab formed at one side thereof; a pouch formed so as to be enclose and seal the battery cell so that the cathode tab and the anode tab of the battery cell are protruded to the outside; and a shape memory alloy provided in the pouch and having a bent part bent in a specific shape and penetrating through and opening the pouch while being unbent at the time of an increase in a temperature of the battery cell, to discharge gas generated in the pouch when the gas is generated in the pouch due to an increase in a temperature caused by overcharging, overdischarging, and the like, to expand the pouch, thereby making it possible to prevent ignition and explosion.
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