Battery liquid leakage detection device and method

The invention relates to a battery liquid leakage detection device and method. The battery liquid leakage detection device comprises a circulating pump and a gas mass spectrum analyzer, the circulating pump and a detected workpiece form a closed circulating loop through a communicating pipe, a low vacuum state is maintained in the circulating loop, and the gas mass spectrum analyzer is connected with the communicating pipe. According to the battery liquid leakage detection device and method, the volatile substances are uniformly distributed in the circulation loop through multiple times of circulation, so that the diffusion speed of the volatile substances is increased, more volatile substances enter the gas mass spectrum analyzer more quickly, the detection time is shortened, the detection efficiency is improved, and meanwhile, the accuracy and the reliability of a detection result are improved. Moreover, the device and the method can be suitable for the sealing detection of various types of products, and al