{"title":"锂离子电池的多闭环恒流恒应变快速充电策略","authors":"","doi":"10.1016/j.est.2024.114031","DOIUrl":null,"url":null,"abstract":"<div><div>Fast charging is considered the key technology of electric vehicles. Battery expansion is critical during the charging process, reflecting the battery's state and performance. However, most of the current research has ignored the expansion of the battery during charging, which will increase the capacity and performance loss during charging. Therefore, a constant-current constant-strain (CC-CS) charging strategy with multiple closed-loop control is proposed in this paper. The proposed strategy adds a strain control loop to the traditional constant-current constant-voltage (CC-CV) charging strategy. The strain control loop can realize real-time strain control by adjusting the charging current, eliminating the need for complex models. In the study, the CC-CS strategy achieved fast charging of 0 to 80 % SOC in 10.2 min with a cycle life of more than 500 cycles. Compared to the CC-CV charging strategy, the CC-CS strategy reduces the charging time by 6.7 % and the capacity loss by 36.24 % at the same expansion strain limit. Under the same charging speed, the CC-CS strategy reduces the expansion strain by 8.9 % and the capacity loss by 53.96 %. In summary, the proposed CC-CS charging strategy can improve the charging speed and reduce capacity loss, which shows the superiority of this strategy.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A multi-closed-loop constant-current constant-strain fast charging strategy for lithium-ion batteries\",\"authors\":\"\",\"doi\":\"10.1016/j.est.2024.114031\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Fast charging is considered the key technology of electric vehicles. Battery expansion is critical during the charging process, reflecting the battery's state and performance. However, most of the current research has ignored the expansion of the battery during charging, which will increase the capacity and performance loss during charging. Therefore, a constant-current constant-strain (CC-CS) charging strategy with multiple closed-loop control is proposed in this paper. The proposed strategy adds a strain control loop to the traditional constant-current constant-voltage (CC-CV) charging strategy. The strain control loop can realize real-time strain control by adjusting the charging current, eliminating the need for complex models. In the study, the CC-CS strategy achieved fast charging of 0 to 80 % SOC in 10.2 min with a cycle life of more than 500 cycles. Compared to the CC-CV charging strategy, the CC-CS strategy reduces the charging time by 6.7 % and the capacity loss by 36.24 % at the same expansion strain limit. Under the same charging speed, the CC-CS strategy reduces the expansion strain by 8.9 % and the capacity loss by 53.96 %. In summary, the proposed CC-CS charging strategy can improve the charging speed and reduce capacity loss, which shows the superiority of this strategy.</div></div>\",\"PeriodicalId\":15942,\"journal\":{\"name\":\"Journal of energy storage\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2024-10-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of energy storage\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2352152X2403617X\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X2403617X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
A multi-closed-loop constant-current constant-strain fast charging strategy for lithium-ion batteries
Fast charging is considered the key technology of electric vehicles. Battery expansion is critical during the charging process, reflecting the battery's state and performance. However, most of the current research has ignored the expansion of the battery during charging, which will increase the capacity and performance loss during charging. Therefore, a constant-current constant-strain (CC-CS) charging strategy with multiple closed-loop control is proposed in this paper. The proposed strategy adds a strain control loop to the traditional constant-current constant-voltage (CC-CV) charging strategy. The strain control loop can realize real-time strain control by adjusting the charging current, eliminating the need for complex models. In the study, the CC-CS strategy achieved fast charging of 0 to 80 % SOC in 10.2 min with a cycle life of more than 500 cycles. Compared to the CC-CV charging strategy, the CC-CS strategy reduces the charging time by 6.7 % and the capacity loss by 36.24 % at the same expansion strain limit. Under the same charging speed, the CC-CS strategy reduces the expansion strain by 8.9 % and the capacity loss by 53.96 %. In summary, the proposed CC-CS charging strategy can improve the charging speed and reduce capacity loss, which shows the superiority of this strategy.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.