电动汽车电池均衡控制设计

Design of equalization control for battery of electric vehicle

针对电动汽车电池组串联使用过程中的不一致性并由此带来的性能下降和寿命缩短的问题,设计了一种基于阵列选择开关控制的均衡控制结构,并提出了一种新的均衡控制策略;该控制策略根据单体电池电压和设定阀值情况通过先配对再均衡的方法,如此不断的循环往复直至整个电池组电压趋于一致来实现电池组之间的均衡;最后对电池组在充电状态下和非充电状态下分别进行了均衡实验,结果表明,所提出的均衡控制方法具有均衡时间短、效率高、能够完成电池组在各种情况下的均衡等优点。

Aiming at the inconsistency in the use of battery packs in electric vehicles and the performance degradation and shortening of lifetime,an equalization control structure based on array selective switch control is designed and a new equalization control strategy is proposed;The control strategy according to the single battery voltage and set the threshold situation by first pairing and then balanced method,so the constant cycle until the battery voltage is consistent to achieve the balance between the battery;Finally,the battery pack in the experimental results show that the proposed equalization control method has the advantages of short equilibration time, high efficiency and equalization of the battery pack under various conditions.