A novel active equalization method for lithium-ion batteries in electric vehicles
A novel active equalization method for lithium-ion batteries in electric vehicles
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DOI：
10.1016/j.apenergy.2015.01.127
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发表时间：
2015-05
期刊：
影响因子：
11.2
通讯作者：
Yujie Wang;Chenbin Zhang;Zonghai Chen;Xie Jing;Xu Zhang
中科院分区：
文献类型：
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作者：
Yujie Wang;Chenbin Zhang;Zonghai Chen;Xie Jing;Xu Zhang
由于制造限制，单元不一致是不可避免的。因此，基本上需要小区均衡。提出了一种基于电池剩余容量的有源均衡方法，该方法适用于电动汽车锂离子电池组。基于锂离子电池的组合电化学模型，建立了电池模型。在均衡开始时观察电池的剩余容量和荷电状态（SOC）。为了消除电流传感器的漂移噪声，在均衡过程中采用粒子滤波（PF）方法对电池SOC进行估计。提出了第一种高SOC电池放电（FHCD）和第一种低SOC电池充电（FLCC）均衡算法，并分别与1%和3%SOC边界进行了比较。验证实验结果表明，该算法适用于电动汽车锂离子电池的均衡。
Cell inconsistency is inevitable due to manufacturing constraint. Therefore, cell equalization is essentially required. In this paper, we propose a novel active equalization method based on the remaining capacity of cells which is feasible for lithium-ion battery packs in electric vehicles (EVs). The cell models are established based on a combined electrochemical model of lithium-ion batteries. The remaining capacity and state-of-charge (SOC) of cells are observed at the beginning of equalization. The particle filter (PF) method is employed to estimate the cell SOCs during equalization in order to eliminate the drift noise of the current sensor. The first high-SOC cell discharge (FHCD) and first low-SOC cell charge (FLCC) equalization algorithms are proposed and compared with 1% and 3% SOC bounds, respectively. The validation experiment results have shown that the proposed algorithm is suitable for equalization of lithium-ion batteries in EVs.