Capacity-difference Based Battery Equalization Method

Li ZHAO, Yong CHEN, Muyi LIN

Abstract


For a battery management systems(BMS), it is a very important task to balance the cells within the battery pack. Without doing that, the lifetime and capacity of them will decrease quickly. Nowadays, many intelligent control strategies shuttle charges by comparing the voltages of cells. However, the terminal voltages of these cells can not accurately reflect the available capacity stored in them, especially in the noise environment. In this paper, we propose an capacitydifference based battery balancing method, in which the transference quantity of charges was looked on as the balancing criterion. Data stream mining (DSM) technique was used to calculate the balancing capacities. A complete shunting topology was used to test the performance of the proposed method. The simulation and experiment results have shown that, comparing with the traditional terminal voltage based balancing strategy, the battery pack with the proposed strategy can increase 3.5% running time.

Keywords


Battery management systems (BMS), state of charge (SOC), data stream mining (DSM)


DOI
10.12783/dteees/iceee2018/27874

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