What are the conditions that trigger battery thermal runaway?
Battery thermal runaway triggering conditions
Battery thermal runaway occurs under certain triggering conditions, which can be mainly summarized into the following four aspects:
1) Mechanical abuse (such as puncture, crushing, etc.).
2) Electrical abuse (such as overcharging, short circuit, etc.).
3) Thermal abuse (such as overheating, fire, etc.).
4) Abnormal battery aging.
Triggering conditions can be sudden, disruptive events that disrupt the battery's normal operating conditions, such as puncture, impact, short circuit, fire, etc.; or cumulative, accumulating events that occur gradually under abnormal operating conditions, such as overheating, overcharging, abnormal aging, etc. Ultimately, these conditions will trigger violent thermochemical reactions between the battery's internal materials, releasing a large amount of heat and generating a large amount of gaseous products. The causes of thermal runaway in lithium-ion power batteries are shown in Figure 7-43.
