Abstract: Two commercial lithium titanate batteries with different capacities and different packaging forms were taken as the research object, the experimental study of thermal runaway triggering was carried out by means of overcharging, acupuncture and heating. Through summary of the experimental results, it is found that for lithium titanate batteries, under the same current excitation, the heat generation during the overcharge period is more obvious. Piercing direction and battery packaging have greater impact on the triggering of thermal runaway. The time required for an overcharged battery to run away of heating under the same power is much shorter than that of a fully charged battery.

Key words: lithium titanate battery, thermal runaway, trigger conditions, experimental comparison