Research on Active Equalization System of Power Battery

A hierarchical active equalization topology based on Cuk converter and flyback was proposed to solve the problem of inconsistency series battery packs used in electric vehicle power cells. Using state charge (SOC) as standard, two control strategies were developed, second-order equivalent circuit model lithium ion open voltage (OCV) characteristic curve established identify parameters estimate SOC. The single realized, reduced. Finally, a balanced experimental platform built for verification. layered framework gives full play advantages kinds equalization, improves inconsistencies battery. According SOC distribution all cells battery, balancing strategy is selected, which can effectively shorten time.