Abstract
In the proposal of Dual-Carbon plan and the rapid development of clean energy generation, the energy-storage has become an important development direction in the power field. In this paper, the key parameter of the lithium battery-based energy-storage system—SOC estimation method are studied, the second-order resistance-capacitance model of the lithium battery is analysed. The equivalent circuit model of the lithium battery is established. The calculation basis of SOC in lithium battery is determined. The SOC estimation method of the battery is realized by BP neural network. The availability and performance of the advanced method is proved by the simulation analysis results based on the public lithium battery data.
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