Supercapacitors, also known as ultracapacitors or Electric Double-Layer Capacitors, are considered as new solutions for space power supplies because of their advantages such as a high power-density, a wide temperature range and a long life. Graphene supercapacitors (GSCs), with graphene structure served as the highly active material, are new types of high-performance and new-concept supercapacitors. However, there are no cases of supercapacitors, especially GSCs, being used as power system for spacecraft independently. This paper introduces the design, test and application of the power supply based on GSCs for the electromagnetic separation system in Q-SAT mission. The power supply is integrated by multiple GSCs to meet the requirements of the separation system, providing 600W power within 2 × 10⁻⁵ m³ and 1 kg. The design, packaging method, test and result is reported in the paper. The rated voltage of the selected GSCs is 2.7 V, and the power density reaches 1.1 × 10³ W/kg and 2.6 × 10⁶ W/m³. The power supply based on GSCs has passed the verification test successfully including mechanical, electrical, vacuum and thermal tests from −20–60 °C. It successfully drove the separation system and guaranteed the task of unlocking and releasing Q-SAT in the flight on Aug 6, 2020. The significance of this work lies in the following aspects: First, the feasibility of application on the satellite separation system in space of GSC is demonstrated. Second, the design and application case of supercapacitor as a driving power supply for a satellite separation system is presented. Third, a screening and integration method for GSCs packaged as a space power supply is proposed and verified. The space power supply based on GSCs will be used more widely in space according to this research.

超级电容器，也称为超级电容器或双电层电容器，因其功率密度高、温度范围宽和寿命长等优点而被认为是空间电源的新解决方案。石墨烯超级电容器（GSCs）以石墨烯结构为高活性材料，是新型高性能、新概念的超级电容器。然而，还没有超级电容器，特别是GSCs独立用作航天器动力系统的案例。介绍了Q-SAT任务电磁分离系统中基于GSC的电源的设计、测试和应用。电源由多个GSC集成，满足分离系统要求，在2×10 ^-5  m范围内提供600W功率³和 1 公斤。论文中报道了设计、封装方法、测试和结果。所选GSC的额定电压为2.7 V，功率密度达到1.1×10 ³  W/kg和2.6×10 ⁶  W/m ³. 基于GSC的电源成功通过了验证测试，包括-20-60°C的机械、电气、真空和热测试。成功驱动分离系统，保障了2020年8月6日在飞行中解锁和释放Q-SAT的任务。这项工作的意义在于以下几个方面： 第一，在空间卫星分离系统上应用的可行性证明了 GSC。其次，介绍了超级电容器作为卫星分离系统驱动电源的设计和应用案例。第三，提出并验证了封装为空间电源的GSC的筛选和集成方法。根据这项研究，基于GSC的空间电源将在太空中得到更广泛的应用。