Simulation study of a battery discharge power balance system based on the external energy storage method

doi:10.19799/j.cnki.2095-4239.2020.0016

Abstract

Abstract:

Battery packs exhibit inconsistent charge-discharge rates during their work cycles because of the differences among single cells, resulting in low work efficiency, low energy utilization, and short service life. To resolve these issues, a positive balancing circuit is designed for the power battery of a flyback multi-winding transformer based on a supercapacitor. By considering the battery voltage and state of charge as the judgment control conditions, the supercapacitor, which is an external energy storage component, cooperates with the multi-winding transformer to balance the energy of the cell. Simulation results show that the equalization circuit and control strategy can effectively weaken the barrel effect during the work cycle of the battery pack, improving its working efficiency, endurance, and service life.

Key words: electric vehicle, battery equilibrium, super capacitor, multi-winding transformer, simulation

CLC Number:

TM 911

ZHENG Zheng, GAO Weixing, ZHANG Xi. Simulation study of a battery discharge power balance system based on the external energy storage method[J]. Energy Storage Science and Technology, 2020, 9(4): 1167-1177.

Figures/Tables 15

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