Design and In-Orbit Application of Power Supply System for Orbiter of Chang’E-5

Abstract

Based on the framework of “solar cell array+battery groups” used in the first and second phases of lunar exploration, the power supply system of orbiter is designed according to the characteristics of the lunar sampling and return mission of Chang’E-5 lunar exploration. This paper introduces the mission requirements and characteristics of the power system of Chang’E-5 orbiter. According to the power demand of the orbiter in different flight stages, the operation mode of the power framework is proposed. The control and protection strategy are designed considering the faced problems. Through the shunt and discharge regulation of solar array and charge and discharge regulation of battery group, the stability of bus voltage and efficient management as well as the reasonable distribution of power are ensured. The on-orbit data show that the power supply system works well, which proves the feasibility of the design. It can be used for reference for the design of the power system in the lunar orbital base and other deep space exploration missions in the future.