Abstract: The surge in the national fleet of new energy vehicles has driven the expansion of the lithium battery balanced maintenance market, but there are significant differences in the balancing effects of different devices. In response to this situation, this paper takes the self-developed equalization based on transformer-type active balance technology as the research object, and studies the balancing effects under different balancing target voltage differences and maximum balancing currents. The results show that the device's equalization effect meets the expected design goals. By setting the target voltage difference at around 20 mV and the maximum equalization current rate at 0.72C, the optimal value of battery maintenance efficiency is achieved. This confirms that "precise setting of target voltage difference+reasonable adaptation of equalization current" is the key to achieving efficient equalization. This conclusion has certain reference significance for parameter selection in actual production and maintenance.

Key words: new energy vehicle; active balance technology; balancing equipment; balanced effect

摘要： 全国新能源汽车保有量的激增带动了锂电池均衡维修市场的扩大，但不同设备的均衡 效果存在显著差异。针对这一情况，文章以基于变压器式主动均衡技术的自研均衡设备为研 究对象，分别研究了不同均衡目标压差、不同最大均衡电流下的均衡效果。结果显示，设备 均衡效果符合预期设计目标，且将目标压差值设定在 20 mV 左右，最大均衡电流倍率设定为 0.72C，可达成电池维修效率的最优值，印证了“目标压差精准设置+均衡电流合理适配”是 实现高效均衡的关键，该结论对实际生产维修的参数选择也具有一定参考意义。

关键词: 新能源汽车；主动均衡技术；均衡设备；均衡效果