SECONDARY BATTERY
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United States of America Patent
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Jun 20, 2017
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Jun 20, 2016
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Abstract
The secondary battery of the present application includes a cell, an electrolyte and a case, the cell includes electrodes and a separator. The secondary battery further includes a gas-generating additive and a water-generating additive. During the overcharging process of the Li-ion battery, when the battery reaches a certain temperature, the water-generating additive decomposes and generates a large amount of water. Then, Li salt and the gas-generating additive are induced to decompose and generate a large amount of gas, so that when the internal pressure of the battery reaches a certain value, the charging current is interrupted in advance by a device for interrupting charging current. Moreover, the water-generating additive can absorb the heat generated by the battery during decomposition, so that the internal temperature of the battery decreases, thereby preventing the overcharge failure of the battery.
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