Why is the electric car fire exploding is a lithium-ion battery and the lead-acid battery is not much?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

The lithium-ion battery is a desired source of power, with an excellent energy density, light quality and excellent anti-aging performance, but at the same time, lithium ions as a tight chemical composition of the battery, lively strong. Once a short circuit is short, there is a lot of heat, combustion, and even explosion. The safety protective portion of the lithium-ion battery is the separator between the positive and negative poles.

When charging, the lithium ion runs from the positive electrode to the negative electrode, combined with the electron-charged electrons, and the opposite lithium ion is passed by electrolytic solution when discharged. The process of running to the negative electrode, and the outer electron is through another road (electronic conductor) to the positive electrode, thereby forming a discharge process. Normal charge and discharge, electron and lithium ions reach the same electrode by two different roads, this two roads are blocked by battery separators, thus the risk of short circuits.

The electric motor vehicle has an explosion, more than 90% of the lithium-ion battery over-plane lack of power-on protection, resulting in a lithium-ion crystalline penetrating diaphragm, lithium electron with electron large-area intersection, forming short circuit, electrolytic liquid mist An open flame in high temperatures, thereby happening dramatic explosion, and also releases a lot of fatal poisonous gas. In addition, the lithium-ion battery is squeezed, extremely high temperature, and fierce will also cause short-circuit that causes short circuit, thus a dramatic explosion. However, qualified lithium-ion batteries and charging equipment have intelligent power-off or high-strength protective devices, generally not knocking.

Inferior lithium-ion batteries and charging equipment do not have these, the risk of lithium ion battery will increase greatly! Although the lead-acid battery is not high, due to the attributes of the chemical composition, there is no lithium ion battery, and the lead-acid battery technology has been quite mature, the short-circuit probability is small, and the metal sheet material of lead material is internally, and is intensive. Pressure, high temperature resistance is that lithium-ion batteries cannot be comparable. .

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