Study on estimation of lithium-ion battery based on dual-power model and ampere-hour method

The equivalent circuit model of lithium-ion battery is inconsistent with the internal electrochemical state of the battery, so the prediction of the battery state based on the battery model has large error, and compensation based on the algorithm has not been resolved the root cause of the problem, while the dual-power battery model is proposed for it. The dual-power battery model is established according to the relationship between the electrochemical reaction and the external characteristics, and it is verified by experiments. In experiments, the accuracy of the model is higher than the existing model, and it can accurately simulate the dynamic characteristics of lithium-ion battery.