Cylindrical lithium secondary battery with pressure activated current interruptive device
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United States of America Patent
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Jan 20, 2015
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app pub date -
Feb 12, 2009
filing date -
Jun 30, 2008
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Abstract
A cylindrical lithium secondary battery includes an anode and a cathode, capable of occluding or emitting lithium ions; a non-aqueous electrolyte; and a CID (Current Interrupt Device) for intercepting electric current and lowering inner pressure when the inner pressure of the secondary battery is increased. The cylindrical lithium secondary battery may ensure the safety of the battery with respect to overcharging and also at the same time prevent the problem wherein the CID is activated too early, such that the battery stops its operation when the battery is used in a high-temperature environment.
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