Maximum Cycle-Life Equalization Control Strategy for Lithium-Ion Battery

The consistency of series batteries greatly affects the capacity, performance and lifetime of battery pack. Therefore, improving the consistency of battery pack is a key issue on equalization management system. However, existing equalization strategies mostly focus on cells consistency in a single cycle, ignoring the impact of consistency on the maximum cycle-life of the battery pack on a long-term scale. To fulfill maximum pack life, a maximum cycle-life equalization strategy (MCES) is proposed in this paper by analyzing battery aging rate model. Simulation results are presented to verify the proposed equalization control strategy.