论文标题
低频选择开关基于单元间电池电压均衡器，开关计数降低
Low-frequency Selection Switch based Cell-to-Cell Battery Voltage Equalizer with Reduced Switch Count
论文作者
论文摘要
基于选择开关的单元格电压均衡器只需要一个由所有单元格共享的双端口DC-DC转换器。提出了使用电容型转移的CUK转换器和低频单元选择开关的单元格电压均衡器。均衡器中没有隔离变压器和二极管导致高效率，并且使用低频选择开关可显着降低驱动电路的成本。使用双极电压总线提出了一个低频细胞选择网络，与现有的大量单元格相比，与现有的低频细胞到电池均衡器相比，开关数几乎是一半。提出了一种新型的细胞电压回收补偿方法，该方法减少了选择开关的操作数量和均衡时间。提出的均衡器由继电器实施，并用8细胞锂离子堆栈进行验证。开发的原型显示了超过90 \％的效率，并且在充电，放电和变化的负载条件下的电压平衡性能良好。实验结果还表明，使用拟议的电压补偿，继电器开关数量的一个数量级减少，均等时间的显着减少。
A selection switch based cell-to-cell voltage equalizer requires only one dual-port dc-dc converter shared by all the cells. A cell-to-cell voltage equalizer is proposed that utilizes a capacitively level-shifted Cuk converter and low-frequency cell selection switches. The absence of isolation transformer and diodes in the equalizer leads to high efficiency, and the use of low-frequency selection switches significantly reduces the cost of the drive circuits. A low-frequency cell selection network is proposed using bipolar voltage buses, where the switch count is almost half, compared to the existing low-frequency cell-to-cell equalizers for the case of a large number of cells. A novel approach for cell voltage recovery compensation is proposed, which reduces the number of operations of the selection switches and the equalization time. The proposed equalizer is implemented with relays and verified with an 8-cell Li-ion stack. The developed prototype shows the efficiency of over 90\% and good voltage balancing performance during charging, discharging, and varying load conditions. Experimental results also show about one order of magnitude reduction in the number of relay switchings and a significant reduction in equalization time using the proposed voltage compensation.
