LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a lithium secondary battery capable of suppressing thermal runaway caused by shorting inside a battery.

SOLUTION: The lithium secondary battery comprises a positive electrode 3 comprising a positive electrode active material that occludes and discharges lithium ion, a negative electrode 4 that occludes and discharges lithium ion, and a dummy laminate 9 in which a dummy positive electrode 6 connected to a positive electrode terminal and a dummy negative electrode 7 connected to a negative electrode terminal are alternately stacked while comprising a shorting separator 8 for insulating the dummy positive electrode 6 from the dummy negative electrode 7. The dummy laminate 9 is characterized in that it is stacked outside the positive electrode 3 and the negative electrode 4 stacked alternately.

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