Review of Cell Balancing Technics with Reduced Heat Production

For a large energy storage is necessary to balance energy between cells to extend battery resource and storage capacity. During cell balancing energy dissipation is unavoidable. Three main solutions are existing to decrease component heating during balancing procedure. Balancing current is important parameter of battery balancing system. Reducing heat dissipation allows to increase balancing current. Active balancing technics is popular solutions to reduce energy dissipation due energy redistribution instead of dissipation. Active balancing requires secondary energy storage that may be realized by inductance or capacitor. Passive balancing can be realized with less heating when ballast resistors is replaced by diodes. For understanding benefits of each technic is necessary to model every type of balancing technic and compare losses and complexity