Everyone knows that large capacity and long life are the advantages of forklift lithium batteries. Due to the general environment, lithium batteries are receiving more and more widespread attention. However, as the market continues to develop, problems with lithium batteries appear one after another, causing heated discussions among people, such as swelling and easy explosion. So are lithium batteries really mobile bombs? Why does it explode? After our analysis, the main reasons for explosion can be divided into three types: overload, external short circuit and internal short circuit. Let's understand these three "culprits" that can cause lithium battery explosions one by one
1. Overcharging: When the battery cell is overcharged, it can cause discharge excessive lithium from LThe positive electrode will cause changes in the structure of the battery. Failure to insert the lithium from the negative electrode into the negative electrode will also cause lithium precipitation on the surface. When the voltage reaches more than 4.5V, the electrolyte will decompose to produce a large amount of gas. . Overloading may result in leakage, deformation, fire and other dangerous situations. In severe cases, this can cause an explosion!
2. External short circuit: refers to the exterior of the battery cell, including short circuits caused by a series of factors such as poor internal insulation design of the forklift's lithium battery. malfunction. If a short circuit occurs outside the battery core and the electronic component does not break the circuit, the discharge capacity of the battery will be very large at this time-there, which will cause the battery temperature to increase. Excessive temperature will damage or directly damage the diaphragm. inside the battery core, which will cause internal defects and trigger the explosion we fear most!
2. Internal short circuit: Once an internal short circuit occurs, the forklift lithium battery will discharge a large amount of current, generate a large amount of heat energy and will form a large amount of gas inside, which will cause the internal pressure to be too high, and when the pressure reaches a level that even the battery shell cannot withstand, it will explode!
So, do you all understand the “culprit” that causes lithium batteries to explode? Do you still need to be more careful when using lithium batteries?