应用三电极方法对锂离子电池充电析锂风险预测及评价做了一定研究，提供了一种锂离子电池析锂的定性分析方法。实验选择不同的石墨负极材料制作三电极软包电池，分别对其在相同倍率下充电，对比负极电位达到0 V或最低电位时电池的SOC。测试结果表明，应用小粒径碳包覆石墨制作的软包电池，负极达到最低电位对应的SOC更高，表明电池充电析锂风险更低，动力学性能更好，此方法可定性评价不同材料体系的充电动力学性能。另外，对磷酸铁锂电池充电制度作了相关研究，充电过程采用电流分步阶梯递减的方式，既保证了电池整体充电时长，同时降低了充电末期负极析锂的风险，保证电池性能。

The risk prediction and evaluation of lithium deposition during charging process of lithium-ion batteries are studied using three-electrode method, and this work provides a qualitative analysis method for lithium deposition.Different kinds of graphite materials are chosed to produce three-electrode pouch batteries, which are charged at the same rate, and then compared the SOC when the anode potential reaches 0 V or the lowest potential.The test results show that the battery produced with carbon-coated graphite and small particle size has a higher SOC corresponding to the lowest potential of anode, which indicate that the battery has a lower risk of lithium deposition during charging and better dynamic performance.This method can be used to qualitatively evaluate the charging dynamic performance of different material systems.In addition, the charging system of LFP batteries is researched in this work.A step-by-step declining current is used during charging process, which not only ensures the overall charging time of the battery, but also reduces the risk of lithium deposition at the end of charging, and then the performance of the battery can be guaranteed.