Two reasons can cause lithium batteries in electric vehicles to explode:
1. Over-discharge or self-discharge reaction at low voltage will cause lithium-ion to decompose and destroy. active materials, which could cause the battery to explode.
2. Long charge and deep charge may cause explosion. If your lithium battery is fully charged and placed on the charger, it will be charged in vain. And none of us can guarantee that the characteristics of the battery charge and discharge protection circuit will never change and the quality is foolproof, so your battery will be on the verge of danger for a long time.
Detailed information:
The rated voltage of lithium-ion batteries, due to changes in materials, is generally 3.7V, phosphate lithium iron (hereinafter referred to as iron phosphate) The positiveis 3.2V. The international standard for the terminating charge voltage when fully charged is 4.2V and that of iron phosphor is 3.6V. The terminating discharge voltage of lithium batteries -ion is 2.75V~3.0V (domestic battery manufacturers give operating voltage ranges or termination discharge voltages. Each parameter is slightly different, generally 3.0~2.75V, and iron phosphorus is 2.5 V.).
Continuing to discharge below 2.5V (iron phosphor 2.0V) is called overdischarge (the international standard is a minimum of 3.2V, iron phosphor 2.8V at low voltage or self-discharge reaction will cause lithium). ions Active substances are broken down and destroyed and are not necessarily restored. Any form of overcharging lithium-ion batteries will result in serious damage to battery performance or even an explosion. Lithium-ion batteries mustAvoid overcharging the battery during the charging process.
Reference materials:
Lithium battery - Baidu Encyclopedia