Electric vehicle lithium battery explosion cause

　　Author ：Iflowpower – Portable Power Station Supplier

First, the negative electrode capacity of the lithium battery is less than the negative electrode portion of the lithium battery positive electrode portion, the lithium atom produced during charging cannot be inserted into the interlayer structure of the negative electrode graphite, and the surface of the negative electrode is formed, forming a crystallization. The crystallization in the lithium battery will result in a short circuit. At this time, the battery is dramatically discharged, which will generate a large amount of heat, burn the diaphragm.

High temperature will break the electrolyte into gas, when the pressure is too large, the battery will explode. Second, the moisture content is too high, the moisture can be reacted with lithium, producing lithium oxide, so that the capacity of the battery is lost, and the battery is easily charged and the gas is generated, and the decomposition voltage of the moisture is low. It is easy to decompose the generating gas.

When this series of generated gases increase the internal pressure of the battery, the battery core will explode when the outer casing of the battery cannot be affected. Third, the internal short circuit short circuit causes a large current discharge, producing a large amount of heat, burn a bad diaphragm, resulting in a larger short-circuit phenomenon, will break the electrolyte into gas, the internal pressure is too large, the battery will explode. Fourth, when the lithium battery is overcharged, the lithium excessive release of the positive electrode will change the structure of the positive electrode, and excessive lithium is too much easily inserted into the negative electrode, and it is easy to cause the negative electrode surface to the lithium, and when the voltage is reached When 4.

5V is above, the electrolyte will decompose a large amount of gas. It may cause explosion in all kinds of. 5.

External short-circuit short circuit may result in the positive and negative pole error, due to external short circuit, battery discharge current will make the heat of the battery, high temperature will cause the diaphragm inside the battery to shrink or completely damage the internal short circuit. Therefore, therefore exploded. .