Lithium ion secondary battery
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United States of America Patent
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Aug 24, 2021
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N/A
app pub date -
Jul 9, 2019
filing date -
Mar 14, 2017
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Abstract
A lithium ion secondary battery that includes a positive electrode, a negative electrode, a separator, a nonaqueous electrolytic solution, and a PTC layer between a positive electrode mixture layer and a positive electrode current collector and/or between a negative electrode mixture layer and a negative electrode current collector, the PTC layer having a positive temperature coefficient of resistance. The PTC layer contains nonconductive filler particles, and the electronic resistance at 120° C. is equal to or more than 100 times the electronic resistance at room temperature.
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