What causes the heating of lithium battery pack during charging?

Lithium battery packs generate heat during charging. The simple explanation is that heat occurs in chemical reactions. Lithium battery heat is a normal phenomenon. This is an energy conversion process. Heat is part of the conversion of electrical energy into heat. Lithium iron battery may be the battery's own failure. It may be due to the aging of the battery, the increase of internal resistance, the drying of the electrolyte, and the internal short circuit, which cause heat. The author of this article will talk about the cause of the heat of the lithium battery pack. What is the heating phenomenon of lithium battery pack? Heating of lithium iron phosphate battery packs is a common phenomenon in life. It often occurs in wireless home appliances such as mobile phones and laptops that use lithium batteries as power sources. As the lithium battery packs are discharged, there will be chemical reactions inside the batteries, causing a lot of The heat energy of the iron-lithium battery causes the temperature of the iron-lithium battery to rise, so that we will feel the temperature when we touch it with our hands, which is a common phenomenon in most lithium batteries. What is the reason for the heating of the lithium battery pack? The heating of the lithium battery pack may be caused by the failure of the lithium battery itself. It may be caused by the aging of the battery, the increase of internal resistance, the drying of the electrolyte, the internal short circuit, etc., and the heating may be caused by lithium. The battery charger problem, the general charger does not have the pulse function, and there is no negative pulse to eliminate the polarization function, this type of charger usually can not be constant voltage in the later stage of charging, and even cause a large amount of gas out of the battery, loss of water, and heat. Generally speaking, there are four reasons for the heat generated when the lithium battery pack is charged: ⒈The lithium battery and the charger are not matched, and the matching of the voltage and current between the charger and the lithium battery pack is rarely considered. If you use these mismatched chargers to charge, it will cause the electric vehicle battery to overheat; ⒉Battery failure or serious loss of water, you should check the battery or refill the battery, and the battery that has been used for more than 15 months should be maintained and added water; ⒊ The temperature of the lithium battery pack charging environment is too high. The charging place should avoid high temperature environments and be well ventilated. ⒋Irregular charging and irregular electricity is a very common cause of heating of lithium battery packs. To sum up, over-charge and over-discharge are all prone to explosions. In short, it is prone to explosions if used incorrectly. What is the hazard of heating lithium battery pack? 1. Excessive heating of the iron-lithium battery pack for a long time will cause the temperature of the internal parts to rise, which will affect the normal operation of the parts; 2. The long-term heating of the lithium battery pack will increase the heat of the battery itself, if it is a sealed battery, it will The internal air swells violently, causing the battery to bulge out, which may cause the battery to explode in severe cases; 3. Long-term excessive heating of the lithium battery pack will accelerate the aging process of the product itself and shorten its life. How to prevent heating of lithium battery pack during charging? 1. It is not advisable to use a high-current charger for too long. Charging for too long will damage the lithium battery, and heat will also occur. 2. It is best to use the original lithium battery pack charger, and buy products with guaranteed quality or with good quality reputation. 3. If you are not in a hurry to use it, it is recommended to take out the lithium battery for charging, so as not to cause the battery to heat up. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Introduction to 18650 lithium battery repair methods and correct use of lithium batteries