Research on Accurate Model of Lithium Battery

In order to build accurately the external characteristic curve of lithium-ion batteries, this paper improve existing lithium-ion battery models, and verify the improved lithium-ion battery model in Simulink. In this paper, for reflecting the accuracy of the improved external characteristics of the lithium-ion battery model, the external characteristic curves of lithium-ion battery model simulation before and after improvement are compared under different temperature and discharge current conditions. The comparison results show that under different operating conditions, the improved model can more accurately reflect the experimental conditions of lithium battery discharge in the concave function discharge area than before the improvement.