Lithium battery explosions are caused by thermal runaway or diaphragm damage.
Thermal runaway is easy to understand, that is, overheating. Lithium batteries will burn, catch fire or explode if they overheat.
There is a separator inside the lithium battery. If the separator is damaged, the positive and negative electrodes will be in direct contact, causing a short circuit.
If the battery is short-circuited, it will also explode instantly.
Therefore, it is very dangerous to accidentally break or puncture the battery when using lithium batteries.
When charging, do not overcharge, and the voltage and current should not exceed the specified values.
If the voltage and current exceed the specified values, the temperature of the lithium battery will be too high, which can easily cause explosiondare the lithium battery and catch fire.
Therefore, it is recommended to use the original charger when charging.
There are two types of lithium batteries commonly used in pure electric vehicles, one is lithium iron phosphate battery and the other is ternary lithium battery.
Ternary lithium batteries have high energy density and light weight, but their safety is not good.
Lithium iron phosphate batteries are safe but have low energy density.
Lithium iron phosphate batteries will only burn at 800°C, and ternary lithium batteries will start burning at 200°C.
Major automakers are constantly looking for ways to improve the safety of ternary lithium batteries.
If used normally, ternary lithium batteries are still very safe.