关键词: 航天电源, 太阳能电池, 燃料电池, 核能发电系统, 微重力

Abstract: The space power is required for high energy density，high reliability and long running time. The research of new energy technologies has drawn a great attention. This paper describes the development of these technologies，including new chemical energy as regenerative fuel cell（RFC），lithium-ion batteries；new solar photovoltaic；solar and nuclear dynamic with high and long running power. And it is focused on the characteristics and the problem in these application space power systems：accumulators，solar array-accumulators，fuel cells and nuclear power，etc. The flow and heat transfer of these space power systems are described in this paper. Also，this paper has some future view on the space power：solar cells have the development for the thin film，chemical power need the breakthrough of the new technology，the progress of the nuclear and solar dynamic power technology are essential to the long-running and high power in space.

Key words: space power, solar cells, fuel cells, nuclear electric generating systems, microgravity