Research on control technology of multi-level battery cascade power supply for high-voltage large-current charging

摘要

As a high-voltage large-current rapid charging technology, the multi-level battery cascade charging technology has been gradually used in the charging of pulse power equipment, especially the large value capacitor. The control technology of the multi-level battery cascade charging power supply becomes the key to realize the charging effectively. This paper introduced a ten-level battery cascade power supply and researched the control technology, including the design of the optical fiber communication system and optical fiber drive circuit of cascade switches, the research of sequential control method, the design of voltage and current detection circuits and various faults synthetize circuits, the research of voltage feedback control and the realization of switchover charging method used in the multi-group loads. In the experiments of the ten-level battery cascade charging power supply, the average charging power is 92 kJ/s. The waveforms of the experiment results proved that the control system can work effectively.