考虑温度影响的可重构式储能系统电池荷电状态的估计OA北大核心CSTPCD

To estimate the state of charge(abbr.SOC)of the li-ion battery accurately,considering the temperature effect on the basis of the reconfigurable battery module,the temperature-cor-rected SOC of the reconfigurable battery could be estimated by combining with graph calculation.Firstly,the open circuit voltage(abbr.OCV)and SOC reference relationships of the battery at different temperatures were obtained through experi-ments,and a thermal model of the reconfigurable battery pack was built to analyze the effect of temperature.Secondly,a re-configurable battery network graph model was built,the depth-first graph was used to traverse and access battery topology,the optimal connection method after temperature correction was found,and the SOC of the individual battery was estimated us-ing the OCV method.Finally,simulation results demonstrate that temperature correction can reduce the temperature error in reconfigurable battery topology and improve the SOC estima-tion accuracy of the reconfigurable energy storage system.