The five-point reasons can cause the electric vehicle lithium-ion battery explosion

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Because the lithium-ion battery explosion causes the accident that the accident will occur, today, I will give you all the reasons for the lithium-ion battery explosion. Due to the popularity of lithium-ion batteries, many electric vehicles on the market use a lithium-ion battery, which also causes the lithium-ion battery to explode the fire caused by accidents. This is because what is caused, today I will give you a good science.

one time. First, the negative electrode capacity of the lithium ion battery is not enough When the negative electrode portion of the lithium ion battery is insufficient, the lithium atoms in which the charging occurs when charging is inserted into the interlayer structure of the negative electrode graphite, and the surface of the negative electrode is analyzed. The crystallization in the lithium-ion battery will result in a short circuit.

At this time, the battery is dramatically discharged, there will be 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, there is a large amount of heat, burn the diaphragm, resulting in a larger short-circuit phenomenon, will cause the electrolyte to decompose into a gas, the internal pressure is too large, the battery will explode.

4. When the lithium-ion battery is overcharged, the lithium excessive release of the positive electrode will change the structure of the positive electrode, and excessive lithium is easily unable to insert into the negative electrode, and it is easily caused to cause lithium via the negative surface, and when the voltage When reaching 4.5V or more, 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. .

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