Research of balancing charging of lithium-ion battery

LAN Xiang, WANG Zheng-shi

                                                         (School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: Aiming at battery equalization problem in the UAV(unmanned aerial vehicle), the traditional charging technique was researched, the loss balance charging technique and the lossless balance charging technique was analyzed, a balance charging technique based on TMS320F28035 and floating ground sampling technique was proposed, the charging test of Lithium-ion Batteries was carried on. The results indicate that the proposed charging technique can monitor the charging current and voltage, implement OVP, OCP, charging current preset, discharging storage mode and charging curve preset function, and attain better balance effect at the end of charging, the voltage difference between two batteries is lower than 10 mV.
Key words: balance charge; lithium-ion battery; current bypass technique