Overview of research on float charging for lithium-ion batteries
YIN Tao,1,2,3, ZHENG Lili1,2,3, JIA Longzhou1,2,3, FENG Yan1,2,3, WANG Dong1,2,3, DAI Zuoqiang,1,2,3
1.College of Mechanical and Electrical Engineering
2.Power Integration and Energy Storage System Engineering Technology Center of Qingdao University
3.National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology of Electric Vehicles (Qingdao), Qiangdao 266071, Shandong, China
Lithium-ion batteries have gradually replaced lead-acid batteries to become the mainstream batteries on the market due to their high energy density, long cycle life and good safety performance. At the same time, lithium batteries have also been widely used in various fields such as energy storage power stations, communication base stations, substations and other backup power systems and commonly used notebook computers. Replenishing the energy of lithium-ion batteries by floating charging is a common way to charge backup batteries, and long-term floating charging will cause changes in the internal structure of the battery, resulting in reduced battery cycle life and even safety issues. This article summarizes the impact of different factors on the floating charge performance and the impact of the floating charge on the lithium-ion battery from three aspects: the influence of external temperature, the difference of float voltage, and the inconsistency of battery cells. It is convenient to optimize the floating charging conditions of energy storage lithium-ion batteries, to ensure that the battery life is increased under stable operation, and to provide guidance for the research progress of energy storage lithium-ion batteries.
Keywords：lithium-ion battery
;
floating charge
;
temperature
;
voltage
;
inconsistency
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