Battery pack with leakage detection and current interrupting means

Abstract

In a battery cell or a battery pack, employing the battery cell, it is necessary to stop the malfunction of the battery cell or the battery pack due to leakage of an electrolyte solution from progressing to prevent occurrence of an accident such as ignition or fuming. To this end, a battery pack includes a battery cell 3, a leakage detection unit 4 for detecting the leakage of an electrolyte solution of the battery cell 3, a current breaker 5 for electrically interrupting a current line between the battery cell and external terminals 9 on occurrence of leakage of the electrolyte solution in the battery cell 3, and a discharging device 6 having the function of self-discharging the battery cell 3. The battery pack is connected to a main equipment body unit X or to a charger Y to effect discharging or charging, respectively.

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