| With the outbreak of global energy crisis and environmental pollution problems,as a kind of clean and efficient energy storage carrier,lithium battery has been gradually replacing the traditional internal combustion engine and has become the main power source for electronic products such as electric motorcars and unmanned aerial veh icles.As the products of the lithium batteries development,the battery management system plays an important role in protecting the safety of battery packs and improving battery life.As the most critical component,the balanced control system directly affects the performance of the battery pack.This paper analyzed the principle and workflow of the balance management system for battery.First,this paper proposed a battery management design to balance the charge of the battery accurately and quickly.Second,the electric charge accumulation method and open circuit voltage method were used to estimate the remaining battery power.In the bi-directional flyback equalizer circuit,a battery classification approach based on the remaining battery power of single battery is proposed,which can classify the battery into different levels.According to the classification status,the equalization charge is selected to avoid the excessive consumption of the power.Third,on the basis of the μC/OS-Ⅲ operating system,this paper present a battery management system to implement system task including battery data collection,battery power estimation,and battery balance control,and so on.Finally,the battery operating status is displayed through the em Win interface.Through the hardware and software testing,system operation stability is guaranteed.In addition,the simulation results of the equalization strategy show that the balance charge quantity is proper,and the equalization speed is fast.What’s more,the conditions of repeated charging and discharging of the single battery are effectively controlled. |
