How much is the power of 18650 lithium-ion batteries burning explosion?

2022/04/02

  Author :Iflowpower – Portable Power Station Supplier

How much is the power of 18650 lithium-ion battery burning explosion? 18650 lithium-ion batteries during charge and discharge process, there will be dangers of explosion; especially under abuse conditions (such as heat, overcharge, short circuit, vibration, extrusion, etc.), battery will combustion, explosion and even personally injured Wait. Therefore, the explosion mechanism of lithium ion batteries is to improve the safety of lithium ion batteries.

How much is the power of 18650 lithium-ion battery burning explosion? The 18650 lithium-ion battery generally contains a protective circuit board, mostly an over-discharge, a lithium-ion battery as a conversion device for chemical energy, and there is inevitably, there is a very large energy, and this energy can be slowly released, safe. Then, if there is a violent reaction, it will become extremely unstable. First, high temperature and high thermal energy, and then in the sealed environment, there is a large amount of gas, and the internal pressure is too large and expanded, and the internal pressure will increase the reaction speed (like the principle of pressure cooker) so vicious circle to the expansion.

The reach of the housing will break through this balance and tear the outer casing, and once the outer casing is torn, a large amount of gas finds the channel of venting, it will suddenly vent, in fact, it is the most dangerous, just like the tire carrying the car The explosion is the same, and the short distance is an example of shocked the ribs in the near range. There have been reports that Samsung mobile phone pick-up calls caused by death, most of China is a lithium-ion battery, and the explosion is very powerful, and should pay attention. The case of the lithium-ion battery explosion has been available, and there are also explosions in the lithium-ion battery factory in Shenzhen - preliminary investigation of the lithium-ion battery semi-finished products in the aging workshop, and its parent company also causes self ignition of the stacked battery failure Fire explosion "suspension, some people call because Shenzhen Taihe thermal cells can't stand.

In addition, according to the survey, the factory warehouse has taken a fire in March 22, and the fire is extinguished until the next morning, causing economic losses 20 million yuan. Two fire accidents were only less than four months. Calculate, a 18650 three-dimensional lithium-ion battery with full electricity 2.

6ah, with a charge of 2.6 * 3.65 * 3.

6 = 34.164 kgce. The general muzzle is emitted during the emission of 2.

2 k. 1. 1 Joule is equivalent to 1 Newton's force to move the object in the direction of force to work for 1 m, so it can be easily in the range of 50 meters.

Kill the enemy. Think about it, a Tesla should use more than 7,000 3.4AH 18650 Lithium-ion batteries.

As long as it is a lithium ion battery, there is an explosion risk, just this is a small risk probability. But once the explosion, the larger the capacity of 18650 lithium-ion battery explosion is unimaginable. 18650 lithium-ion battery burns or exploded by 1, internal short circuit: structural or process defects caused in extreme ear interposers, diaphragm, surplus, burrs, diaphragm discounts.

Ear-ear interpolation often developed towards the thick cell and inner-linked structures, the extreme ear is not in place, which is easy to cause internal acute short circuits to cause burning or explosion in the subsequent finished product plus protection plate or use process, but this situation is almost very Less, unless the external force factors. 2. External short circuit: 1AH below the lithium ion battery, the exploded explosion caused by the burning of the burning, usually blocked or simply blows the extreme ear, the personal decomposition is the power lithium battery or large-capacity mobile phone battery short circuit.

Resulting burning. This involves improper use of improper use of the metal, and does not consider the extreme ears. There is an abnormality of the battery smoke in the installed site; the power lithium battery is also inadequate structure fixed measures (considerations for no circumference), using the process battery in the user The package sway causes damage to the external insulation protective film of the battery or the cable skin, which ultimately causes short circuit combustion.

3, overcharge explosion: This is the most dangerous, but also the company's most afraid, but it will occasionally. From understanding, there are two points: A. Users do not use the matching charger as required to destroy the protection line and the user often charge is not limited, this situation is difficult; B, 18650 lithium ions Battery is unreasonable and the protective plate has failed, and it will also be fried in this case.

Single-section battery is similar. 4. When the 18650 lithium-ion battery is hot, the reaction inside the battery is such as a reaction chain, and each reaction has caused each other.

First, the SEI film analysis released heat heated the battery, which causes the reaction to the negative electrode and the solvent to release more heat, resulting in the reaction of the negative electrode and the binder, solvent analysis, and the positive electrode begins to perform a thermal analysis reaction, and release a large amount of heat and gas Finally, the lithium ion battery is burn or exploded. 5. Manufacturing process.

18650 The manufacturing process of lithium-ion batteries is also aimed factor affecting battery safety performance. The most important of which has three factors, which are positive and negative electrode capacity ratio, slurry average control, coating quality control. 6, temperature.

There are many factors affecting the safety of lithium-ion battery, in which the battery material has a tight effect on the safety of the lithium ion battery, because the battery material generally has thermal activity, and when the battery temperature continues to increase, there will be many thermal reactions. When the heat does not be lost in time, it is easy to cause battery safety accidents, so the choice of lithium-ion battery positive and negative electrode materials has a tight effect on battery safety. 18650 lithium-ion battery explosion burns many people see that the power of lithium-ion battery explosions can cause serious fire or even dead injury, small damage to battery products, the power of lithium-ion battery explosion is like the fire of the stars, can poke the original, so it must be The lithium ion battery exploded cannot be ignored.

In general, the lithium-ion battery will not explode, but once the explosion will be dangerous.

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