Flexible path planning-based reconfiguration strategy for maximum capacity utilization of battery pack  

作　　者：Xinghua Liu Guoyi Chang Jiaqiang Tian Zhongbao Wei Xu Zhang Peng Wang 

机构地区：[1]School of Electrical Engineering,Xi’an University of Technology,Xi’an 710061,Shaanxi,China [2]School of Electrical Engineering and Automation,Anhui University,Hefei 230039,Anhui,China [3]National Engineering Research Centre for Electric Vehicles,School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China [4]Institute for Advanced Research,Anhui University of Science and Technology,Hefei 230000,Anhui,China [5]School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《Journal of Energy Chemistry》2023年第11期362-372,I0008,共12页能源化学(英文版)

基　　金：supported in part by the National Natural Science Foundation of China(62203352,U2003110);in part by the Key Laboratory Project of Shaanxi Provincial Department of Education(20JS110);in part by the Thousand Talents Plan of Shaanxi Province for Young Professionals。

摘　　要：Maximizing the utilization of lithium-ion battery capacity is an important means to alleviate the range anxiety of electric vehicles.Battery pack inconsistency is the main limiting factor for improving battery pack capacity utilization,and poses major safety hazards to energy storage systems.To solve this problem,a maximum capacity utilization scheme based on a path planning algorithm is proposed.Specifically,the reconfigurable topology proposed is highly flexible and fault-tolerant,enabling battery pack consistency through alternating cell discharge and reducing the increased risk of short circuits due to relay error.The Dijkstra algorithm is used to find the optimal energy path,which can effectively remove faulty cells and find the current path with the best consistency of the battery pack and the lowest relay loss.Finally,the effectiveness of the scheme is verified by hardware-in-the-loop experiments,and the experimental results show that the state-of-charge SOC consistency of the battery pack at the end of discharge is increased by 34.18%,the relay energy loss is reduced by 0.16%,and the fault unit is effectively isolated.

关 键 词：Lithium-ion battery Capacity maximum utilization Reconfigurable topology DIGRAPH 

分 类 号：TM912[电气工程—电力电子与电力传动]