As the key technology of the electric vehicle, more and more research on battery management system has been done. And the balancing technology is the important part of battery management system. In this paper, a multi-inductor balancing method based on the Buck-Boost topological structure is used to improve batteries’ inconsistencies by obtaining parameters of the battery pack in real time. The proposed balancing method can improve batteries’ inconsistencies so as to increase the capacity utilization rate of the battery pack and prolong the battery lifespan. And in this paper a series of bench experiments were done to examine the effectiveness of the balancing method.
This paper presents an active cell balancing technique for lithium-ion battery stacks using a flyback dc/dc converter topology. The combination of batteries can be controlled according to the batteries voltages to implement the battery-balancing function. The operational principle of the proposed system is described in detail, then the paper develops different strategies adapting to different working status of battery pack and a series of bench experiments is conducted to examine the effectiveness of the equalization system.
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