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The causes of short circuits in lithium-ion batteries

(1) The positive electrode material is impure or left in the air for too long, resulting in incomplete drying; Failure to remove transition metal impurities from the positive electrode slurry can lead to penetration of the separator or the formation of lithium dendrites in the negative electrode, resulting in internal short circuits;

(2) Short circuit between copper/aluminum current collectors, or contact between positive and negative current collectors caused by untrimmed metal foreign objects piercing the separator or electrode during battery production or use, or displacement of the electrode plate or ear in battery packaging;

(3) The quality of the lithium-ion battery cell separator does not meet the standard, and the lithium-ion battery pack often experiences high current charging and discharging during use. The separator cannot withstand the huge lithium-ion flow in a short period of time, resulting in local or large-scale damage, directly leading to severe heating, scalding, and damage to the battery cell;

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