How to prevent lithium-ion batteries burning explosion?

　　Author ：Iflowpower – Portable Power Station Supplier

How to prevent lithium ion battery explosion is the smallest and most vivid metal in element cycle table. Because of its small size, high capacity density, popular with customers and engineers. However, chemical responses are too active, it brings very high risks.

When lithium is exposed to the air, it will have a severe oxidation reaction with oxygen. In order to improve safety and voltage, scientists have made it possible to store lithium atoms in materials such as graphite and lithium cobalt oxides. The molecular structure of these data forms a nano-stage micro-cell, which can be used to store lithium atoms.

In this way, even if the battery housing is broken, oxygen is entered, and oxygen molecules are too large, and the tiny battery cannot be loaded, so the lithium atom does not contact oxygen, thereby preventing its explosion. This principle of lithium-ion batteries allows people to achieve safe purposes while achieving high capacity density. When the lithium ion battery is charged, the lithium atom loses electrons and oxidizes lithium ions.

Lithium ions travel through the electrolyte to the negative electrode, enter the negative electrode storage unit, obtain electron, and electrons are reduced to a lithium atom. When unloading, the entire process is opposite. In order to prevent the short circuit caused by the direct contact of the battery positive and negative electrode, many small holes of diaphragm paper are added to prevent short circuits.

Good diaphragm paper can also close the fine holes when the battery temperature is too high, so that the lithium ion cannot pass, so as not to waste the work, prevent risk. Safe measures Lithium-ion battery cell over charge voltage is higher than 4.2V, and the coup support will begin.

The greater the pressure, the greater the risk. When the lithium ion battery voltage is higher than 4.2V, only less than half of the lithium atoms remain in the anode data, the battery often crashes, thereby permanently reducing the battery capacity.

If the battery continues to charge, the subsequent lithium metal will accumulate on the surface of the negative electrode because the negative electrode storage room is full of lithium atoms. These lithium atoms grow from the surface of the negative electrode to the lithium ion direction. These lithium crystals will pass through diaphragm, short circuit anodes and cathodes.

Sometimes the short-circuit battery is broken, because during over-charging, the electrolyte and other information decompose the gas, causing the battery shell or pressure valve to expand and break, so that the lithium atoms of oxygen into and the reaction are accumulated in the negative surface, then explode. Therefore, when the lithium ion battery is charged, a voltage limit must be set to take care of the battery life, capacity, and security. The most desirable charging voltage limit is 4.

2V. Lithium-ion battery discharge must also have a lower voltage limit. When the battery voltage is below 2.

4V, some data will be damaged at the beginning. And because the battery will self-discharge, the longer the voltage, the lower the voltage, so it is best not to stop the discharge to 2.4V.

During 3.0V to 2.4V discharge, the lithium ion battery can only release about 3% capacity.

Therefore, 3.0V is the ideal discharge cutoff voltage. When charge and discharge, the current constraint is also necessary in addition to the voltage constraint.

When the current is too large, the lithium ion does not have time into the storage unit, and it will accumulate in the data surface. When these lithium ions are electronically, they will crystallize lithium atoms on the data surface, which is the same, which will form certain risks. If the battery case is broken, it will explode.

Therefore, the maintenance of the lithium-ion battery should at least three aspects: the upper limit of the charging voltage, the lower limit of the discharge voltage, the upper limit of current. A general lithium-ion battery pack, in addition to the lithium ion battery battery, there will be a maintenance plate, and the maintenance plate is important to supply these three maintenance. However, maintenance of these three maintenance plates is obviously not enough, and the global lithium-ion battery explosion is still frequent.

In order to ensure the safety of the battery system, it is necessary to analyze the cause of the battery explosion.