Ultralow-temperature UPS storage battery

The ultralow-temperature UPS storage battery comprises a battery pack, a battery management system, a relay, a DC power source, a fuse and a bidirectional rectifier tube, the battery management system comprises an acquisition unit, a control unit and a high-voltage management unit, and the acquisition unit and the high-voltage management unit are in communication connection through a CAN. The efficient energy storage backup power supply can work in a high and low temperature environment for a long time, can automatically detect the battery temperature and automatically start a battery cell heating function when working in a low temperature environment, is automatically closed after heating is completed, and automatically enters a dormant state when a battery pack is subjected to discharging low-voltage protection and charging is not detected; a charging activation function is automatically started when the mains supply comes, an unattended intelligent automatic management function is achieved, and the efficie