Study On Power Lithium-ion Battery Management System

With the increasingly serious problem of global energy and environmental issues,electric vehicles gradually become the focus of the major automobile enterprisedevelopment, and battery technology is the key to the development of electricvehicles. Power Lithium-ion batteries commonly used as electric vehicle powersupply, its performance will be affected by overcharge and overdischarge in theprocess of charge or discharge; Meanwhile, single battery voltage inconsistencies willappear in the process of charge and discharge, cause some of single battery in thebattery pack is damaged in advance, impact on the entire battery pack. To seek thebalance of power Lithium-ion battery energy, enhance the safety of Lithium-ionbatteries in charging and discharging process, is the most important and urgentproblem to be solved in the development of electric vehicles.First of all, the charge and discharge characteristics of the Lithium-ion batteryand safety of batteries have been analyzed, and the Lithium-ion battery safety issuesunder the overcharge, over discharge and short circuit conditions is also studied.Lithium-ion battery charge and discharge protection system is designed to solve theseproblems, and to achieve the protective effect of Lithium-ion battery in the process ofcharge or discharge. Then, through the power Lithium-ion battery in the process ofproduction, use, storage appear inconsistent reason analysis, proposed the powerLithium-ion battery inconsistency problem solution, and designed a powerLithium-ion battery voltage balancing system, The imbalance of batteries in series inthe process of charge or discharge was solved and the power consumption ofLithium-ion batteries was reduced. In this paper, the design for power Lithium-ionbattery management system is reasonable and reliable, has a very importantsignificance for the development of electric vehicles.