柔性印制膜在太阳电池阵的应用及热适应性试验研究

针对微小卫星太阳电池阵高体积比的功率需求，设计了带柔性印制电路（FPC）的太阳电池阵。该太阳电池阵将太阳电池、FPC与基板集成为一体，具有厚度薄、质量小等优点。通过热循环试验对其环境适应性进行考核，X射线检测结果表明，太阳电池阵上锡焊焊盘与覆铜层连接部位受热应力的影响较大，在长期高低温循环条件下存在锡焊焊盘与覆铜层断裂的风险。为此，给出提升太阳电池阵上FPC抗热形变能力的设计建议，以期为后续太阳电池阵设计提供参考。

The design of flexible printed circuit in solar cell array and experimental study of its thermal adaptability

In view of the demand for the solar array of high volume specific power for the microsatellite, a solar array with flexible printed circuit(FPC) is designed. The solar cells, the FPC and the substrate are integrated, with advantages of thin thickness and light weight. The environmental adaptability is evaluated by the thermal cycling test. The X-ray detection results show that the thermal stress in the solar array at the joint between the solder pad and the copper clad layer is relatively large, signifying a risk of fracture of the solder pad fromthe copper clad layer under the condition of the long-term high and low temperature alternation. Some suggestions are given to improve the thermal deformation resistance of the FPC on the solar array, which may serve to provide a reference for the reliability design of solar arrays.