-Can the safety valve of 18650 lithium battery prevent explosion?

Can the safety valve of 18650 lithium battery prevent explosion?
author:enerbyte source:本站 click352 Release date: 2023-02-17 09:43:23
abstract:
The nominal voltage of a single 18650 lithium-ion battery is generally 3.6V or 3.7V; The minimum discharge termination voltage is generally 2.75V. The common capacity is 1200~3000mAh, and more than 3400mAh is likely to be a virtual standard. After 30 years of development, th...

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The nominal voltage of a single 18650 lithium-ion battery is generally 3.6V or 3.7V; The minimum discharge termination voltage is generally 2.75V. The common capacity is 1200~3000mAh, and more than 3400mAh is likely to be a virtual standard.

After 30 years of development, the preparation process of 18650 lithium-ion battery has been very mature. In addition to the great improvement of its performance, its safety is also very perfect. When the internal pressure of the battery is too high, the safety valve on the top of the battery will open the exhaust to reduce pressure to prevent explosion. However, when the safety valve is opened, the chemicals leaked from the battery will react with the oxygen in the air under high temperature, and there is still a possibility of fire.

The majority of 18650 lithium-ion batteries are packaged in steel shells. Because the batteries with poor quality have no protection function, their internal pressure will increase sharply in the case of overcharge (overcharge). When they exceed the tolerance value, they will explode. Problems such as short circuit, high temperature, or the battery being extruded, deformed or even punctured may cause the battery explosion.

In addition, some 18650 lithium-ion batteries are also equipped with protective plates, which have the functions of overcharge, over-discharge and short circuit protection, and the safety performance is very high. The previous explosion of mobile power was all caused by the use of substandard 18650 lithium-ion batteries or even second-hand waste electricity by unscrupulous manufacturers in order to save costs. Moreover, the utilization rate of 18650 lithium-ion batteries is very high. We can use them correctly in daily use and prevent short circuit, damage or excessive temperature of the batteries. We don't need to worry about the explosion of the batteries. We can't knock over a boat of people with one stick, and determine the safety of 18650 with individual inferior products.

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