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Design of Liquid Metal Battery Equalization System Based on Bidirectional Flyback Circuit

Liquid metal battery (LMB), with characteristics such as long service life, high working current and large capacity, is a potential energy storage battery that can be used for power grid level energy storage. According to the test for charging and discharging characteristics of LMB made in this paper, lower working voltage than conventional batteries makes the design of equalization system difficult. An active equalization circuit based on bidirectional flyback circuit is put forward in this paper. Equalization System including a control module and an acquisition module is designed based on this circuit. This equalization system is tested on LMB with 200Ah capacity and test results show significant improvement of equalization of cells.