Brief description, electric vehicle lithium-ion battery charging explosion

　　Author ：Iflowpower – Portable Power Station Supplier

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 analyze the electrolyte into a 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 electrical core is overcharged and generates gas, the water is analyzed, and the charging is very Easy to analyze the generated gas, when this series of generated gas increases the internal pressure of the battery, the battery core will explode when the outer casing of the battery cannot be affected. Third, internal short-circuit internal lithium battery short circuit causes large current discharge, there is a large amount of heat, burn a bad diaphragm, resulting in a larger short circuit, will cause the electrolyte to analyze gas, internal pressure is too large, and the lithium battery will explode.

Fourth, the lithium-ion battery is overcharging the lithium battery, and the lithium 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 lithium to the negative surface, and When the voltage reaches 4.5V or more, the electrolyte will analyze a large amount of gas. It may cause explosion in all kinds of.

V. External short-circuit external short circuit may result in a positive and negative error, due to external short circuit, electric vehicle lithium-ion battery discharge current is large, the heat of the battery can cause the separator inside the battery or completely bad , Cause internal short circuit, thus exploding. The original one of the fires of the electric vehicle is a single one, and it is basically due to the thermal out of control of lithium ion batteries.

Lithium-ion battery energy density is large, small size, light weight, is the lead-acid battery that cannot be combined. Since the energy density of lithium-ion battery is constantly pursuing, the problem is also expected.