Analysis on parallel operation of boost-type battery power modules

Battery power modules (BPMs) with boost converters are connected in parallel to accomplish a large load current. The paralleled BPMs are strongly interactive with each other. Nevertheless, the analyzed results indicate that the inherent internal resistance may alleviate the mutual interaction. The discharging currents of the batteries can be individually controlled but are coordinated to execute a full amount load current. The experiments are carried out on three boost-type BPMs to confirm the theoretical analyses and to demonstrate the feasibility of balanced discharging.