Battery groups are widely used in production and life. Optimal charging can\nnot only shorten the charge time, but also improve the performance and life of\nthe battery pack. A constant current or constant voltage charging method is\ncommonly used. This type of method cannot adjust the charge capacity in\ntime according to the change of charging capacity of storage battery, and the\ncharge performance is not high. This paper designs a fuzzy PID controller. In\nthe case of variable load and interference, the battery group can still be\ncharged by the optimal charging current. Through the simulation results, the\nfuzzy PID controller works well and verifies the feasibility of the charging\ncontroller.
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