【摘要】 以18650型锂离子电池为对象，对电池热失控和含添加剂细水雾对电池热失控抑制效果进行了研究。结果表明：电池循环次数越多，热失控触发时间越短；实验条件下电池热失控开始温度在250℃左右，20次循环电池热失控持续时间最长。不同压力细水雾对电池热失控均有明显抑制作用，其中0.25 MPa压力细水雾抑制效果最好。1.0%氯化钠、1.5%SDBS和0.5%蛋白质的加入对细水雾抑制电池火焰均有非常好的增效作用，能一定程度上提高细水雾对电池表面温度的抑制效果。更多还原

【Abstract】 Taking 18650 lithium-ion battery as the object, the batteries thermal runaway and inhibition effects of additive water mist on battery thermal runaway were studied. The results show that the more the battery cycles, the shorter the trigger time of thermal runaway; Under the experimental conditions,the starting temperature of battery thermal runaway is about250 ℃, and the duration of battery thermal runaway is the longest after 20 cycles. Different pressure water mist has obvious inhibitory effect on battery thermal runaway, among which 0.25MPa pressure water mist has the best inhibitory effect. The addition of 1.0% sodium chloride, 1.5% SDBS and 0.5% protein can not only enhance the inhibition of water mist on the flame of battery, but also improve the inhibition of water mist on the surface temperature of thermal runaway battery to a certain extent.更多还原