Charge and pressure the cavity where the battery is placed, and visually inspect the surface of the battery for bulges to determine if the battery is leaking. According to relevant information, when using the positive pressure method for leak detection, it is necessary to fill the sealed chamber inside the tested product with helium gas at a pressure higher than one atmosphere. When there is a leak on the surface of the tested product, helium gas will enter the surrounding atmosphere through the leak hole and then use a suction gun to detect the increase in helium concentration in the surrounding atmosphere of the tested product, thereby achieving leak measurement of the tested product.
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