Abstract: The dynamic variation of the battery recharging efficiency of the satellite was studied, and the effects of the satellite orbit, attitude, the sun position, and the battery temperature on the performance degradation of GEO satellite battery were analyzed. The optimized calculating model was designed to predict the best battery recharging time. In-orbit application shows that the proposed method can improve the effective recharge capacity by 5 times, comparing with the automotive recharge. The problem of shortage battery is solved during the shadow period.

Key words: V-Tcurve, Rechargecapacity, Rechargetime, Batterygroup, Geostationaryorbitsatellite