According to the statistics during the maintenance work of the UPS power supply, it can be concluded that for the backup UPS power supply, the fault caused by the battery exceeds 50% of the total failure; for the online UPS, because its circuit design is reasonable, especially with the The development of science and technology, most of them have adopted integrated, modular, intelligent UPS power supply, and the configured backup capacity is relatively large, so the failure caused by the power su