过充循环对锂离子电池容量衰减及安全性影响

许卓, 李希超, 贾隆舟, 陈兵, 戴作强, 郑莉莉

Effect of overcharge cycle on capacity attenuation and safety of lithium-ion batteries

Zhuo XU, Xichao LI, Longzhou JIA, Bing CHEN, Zuoqiang DAI, Lili ZHENG

表5 4个电池热失控特征参数

Table 5 Characteristic parameters of thermal runaway of four batteries

参数 新电池 4.3 V过充循环电池 4.4 V过充循环电池 4.5 V过充循环电池 T1/℃ 78.62 75.44 76.06 73.76 T2/℃ 241.42 229.91 237.54 222.72 T3/℃ 512.26 517.23 656.79 656.30 T4/℃ 195.93 178.71 180.89 183.59 T5/℃ 208.97 199.78 201.09 199.36 Td/℃ 137.77 132.86 128.39 127.88 试验前质量/g 44.13 44.08 44.21 44.02 试验后质量/g 12.69 14.57 19.85 17.54 减重比/% 71.24 66.75 55.10 60.15