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Author ：Iflowpower – Portable Power Station Supplier
How much is the power of 18650 lithium battery burning explosion? 18650 lithium battery during charge and discharge process, there will be danger of explosion; especially under abuse conditions (such as heat, overcharge, short circuit, vibration, squeezing, etc.), battery will have combustion, explosion and even injured, etc. condition.
Therefore, the explosion mechanism of lithium batteries is important to improve the safety of lithium ion batteries. How much is the power of 18650 lithium battery burning explosion? The 18650 lithium battery generally contains the protection circuit board, mostly to prevent over-discharge, lithium-ion battery as a conversion device for electrical energy, inevitably there is a very large energy, this energy can slowly release is safe, then It will become extremely unstable if there is a dramatic reaction. First, high temperature and high thermal energy, and then produce a large amount of gas in a sealed environment, the internal pressure is too large and expanded, and the internal pressure increases will contribute to the speed (like the principle of pressure cooker) so vicious circle to the expansion.
When the outer casing is reached, it will break through this balance and tear the shell, and once the outer casing is torn, a large amount of gas finds the channel of venting, it will suddenly vent. At this time, it is the most dangerous, just like the tire carrying the car. Like the explosion, the short distance is to bleed the human internal organs, and there is an example of shocking ribs.
There have been reports that Samsung mobile phone pick-up calls caused by death, most of the domestic is a lithium-ion battery, which is very powerful, and should pay attention. The case of lithium battery explosions has been available, and there is also a lithium battery plant in Shenzhen. Susk, some people call because Shenzhen Taihe thermal cells can't stand.
In addition, according to the survey, the factory warehouse has taken a fire on March 22, and the fire is extinguished until the next morning, leading to economic losses 20 million yuan. Two fire accidents were only less than four months. Calculate, a 18650 three-dimensional lithium battery with full electricity 2.
6 AH, with a charge of 2.6 * 3.65 * 3.
6 = 34.164 kWh. The energy generated during the emission of the muzzle is about 2.
2 k. 1 Joule is equivalent to 1 Newton's force to move the object in the direction of 1 m, so it can be easily in the range of 50 meters. Kill the enemy.
Think about it, a Tesla need to use more than 3.4ah 18650 Lithium Battery. As long as it is a lithium battery, there is a risk of explosion, just this is a small risk probability.
But once the explosion, the larger the capacity of 18650 lithium battery explosion is unimaginable. 18650 Lithium battery burns or explosion reasons 1, internal short circuit: structural or process defect leads to the interpolation of the ears, the diaphragm package is too small, burrs, diaphragm discounts, etc. Early interpolation tends to appear in a thick battery and within parallel structure, the extreme ear is not in place, and it is easy to cause internal acute short-circuit to occur in the subsequent finished product, but now this situation is almost very Less, unless the external force factors.
2. External short circuit: 1AH below the lithium battery of 1AH, the explosion caused by the burning of the burning, usually a bulging or simply blows the extreme ear, personal analysis is the power battery or massive mobile phone battery. combustion.
This involves the use of improper use of customers - unsatisfactory, the battery is unusually combined in the installed site; the power battery is also inadequate structural fixed measures (considering no circumference), using the process battery in the user Rocking causes damage to the external insulation protective film of the battery or the cable skin damage, which ultimately causes short circuit burning. 3, overcharge explosion: This is the most dangerous, but also the most afraid of enterprises, but still 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 not fried; B, 18650 lithium battery The grouse is unreasonable and the protective plate is invalid, and it will also be fried in this case. Single-section battery is similar.
4. When the 18650 lithium battery is hot, the reaction inside the battery is like a reaction chain, and each reaction promotes each other. The first is that the SEI film is subjected to heat the battery, which causes the reaction to the reaction to the solvent to present more heat, resulting in the reaction of the negative electrode and the binder, the solvent decomposition, and the positive electrode starts to perform the thermal decomposition reaction, and release a large amount of heat and gas.
Finally, the lithium battery is burned or exploded. 5. Manufacturing process.
The 18650 lithium battery manufacturing process is also an important factor affecting battery safety performance. The most important part of these factors are positive and negative electrode capacity ratio, slurry homogenization control, coating quality control. 6, temperature.
There are many factors affecting the safety of lithium batteries, in which the battery materials have an important impact on the safety of lithium batteries, because the battery materials are generally thermally active, and when the battery temperature continues to increase, there will be many thermal reactions inside. When the heat is not lost in time, it is easy to cause battery safety incidents, so the choice of lithium battery positive and negative electrode materials has an important impact on battery safety performance. 18650 lithium battery explosion burns many people see that the power of lithium battery explosions can cause serious fire or even dead injury, small can damage battery products, the power of lithium battery explosion is like fire of the stars, can be ignored, so they must not ignore lithium Battery explosion.
In general, the lithium battery will not explode, but once the explosion will be very dangerous.
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