The application of supercapacitors in UPS systems has multiple significant advantages. Firstly, it has the characteristic of fast charging and discharging, which is suitable for responding to changes in instantaneous power demand. Secondly, it has a long cycle life and is more suitable for frequent charging and discharging situations compared to traditional batteries. In addition, supercapacitors have high power density and are suitable for fast power supply in case of instantaneous power failure. Furthermore, they have good low-temperature performance and can maintain stable performance over a wide temperature range. Finally, supercapacitors have good environmental friendliness, significant advantages in size and weight, low maintenance costs, and longer battery life.