Abstract: Electric vehicles are becoming more and more popular, with an increasing market share. The vehicle's driving range and the safety of power batteries have always been unavoidable issues in the development of electric vehicles. The inconsistency between power battery units can lead to a decrease in the available capacity of the battery, shorten the vehicle's driving range, and also cause overcharging and discharging problems of the power battery and then lead to safety accidents. Balancing operations between battery cells can reduce differences between cells and improve consistency. The balancing of batteries is a lengthy process, which leads to time-consuming and inconvenient development and research on the performance of balancing algorithms. This article proposes a battery balancing strategy modeling, simulation and analysis method, which uses Simulink software to model battery and balancing execution environment. Through simulation verification, this method can effectively simulate battery balancing scenarios, quickly verify the performance of balancing algorithms, and improve development efficiency.

Key words: Lithium battery; Battery management system; Battery balance; Simulation analysis; Simulink

摘要： 电动汽车越来越普及，市场占有率越来越大，但是整车续航能力以及动力电池的安全 性始终是电动汽车发展中不可回避的问题。动力电池单体间的不一致性会导致电池可用容量 变小缩短整车续航里程，也会引起动力电池的过充过放问题导致安全事故。电池组单体间的 不一致性问题不可避免，电池生产过程，初始状态以及使用过程都会导致差异。针对电池单 体不一致性问题行业普遍采用电池均衡的办法减少单体间的差异提升一致性。考虑电池发热 等问题，电池均衡的电流很小所以完成均衡是一个长时间的过程，导致开发研究均衡算法时 性能验证耗时长非常不方便。文章提出一种电池均衡策略仿真分析方法，该方法主要通过 Simulink 软件进行电池等效电路模型建模，基于电池模型基础搭建均衡仿真执行环境。通过 仿真验证该方法能够有效地模拟电池的均衡场景，快速验证均衡算法的性能提高开发效率。

关键词: 锂电池；电池管理系统；电池均衡；仿真分析；Simulink