(2) Advanced Techniques We have made the following progress in our research work on space power systems and in our ECS power system. 1. We have developed a reliable adhesive technique to prepare the large solar panel. The average efficiency of solar cell used is 10.3% (AMO, 25°C). So the performance of the power supply of ECS is reliable and of a high quality. 2. The seal technique of Ni-Cd cells for application on high orbit satellites is greatly improved. The leakage rate is decreased from 10~8 torr L/S to as low as 10“10 torr L/S. 3. A controlling circuit is designed to assure the high reliability as: Solar array 99.5% Cd-Ni battery 99% Controller 94% System 92.6% (3) Flight Performance The power system of satellites shows very good flight performance, even in severe conditions. 1. The Ni-Cd battery in the low orbit satellites was often in short charge for a long period, the accumulated total discharge depth was over 80%, and the power output remained normal. 2. The Ni-Cd battery of the ECS bore a very high temperature (72°C) shock but no significant effect on power supply was found. 3. The power system of SES stayed in very good working condition after 8 years and
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