Why does the lithium-ion battery charger for electric vehicles charge heat?

Professionals pointed out that there are four important reasons why the lithium-ion battery charger for electric vehicles will be excessively hot when charging: 1. The lithium-ion battery and the charger do not match. This is the most common. Some households will have one or more electric cars, and many electric cars of different brands are of different brands. The chargers of lithium-ion batteries are naturally different, but in the process of use, they will often be mixed and used, which does not match. The charger will cause the battery to move the heat of the power supply when charging, so it will become hot and hot. For this, it is recommended not to use other brands of chargers easily, and only use your own. 2. Heat caused by charger problems. General chargers have no pulse function, and no negative pulse elimination function. This type of charger usually cannot maintain a constant voltage in the later stage of charging, which will cause the voltage of the lithium-ion battery to exceed the allowable value, resulting in the battery A large amount of gassing, water loss and heat generation. When the battery has a small amount of heat, it is normal heat. If the heat is abnormal, it is the cause of the charger when the battery performance is good. 3. If one of the batteries is short-circuited, you can use a multimeter to measure the voltage of each lithium-ion battery. If you find that the one with very low voltage is short-circuited. It's time to replace the battery. In fact, there are signs that the battery is scrapped before. For example, the battery did not heat up when it was charged. It was found that the battery was heating up after using it for about a year (some or even shorter time). (Touch the battery shell by hand. You can feel it) However, although most users feel weird, they don't care too much, because they don't feel that it hinders riding. Most of the above situations happen suddenly on a summer day. 4. The battery's own problems Li-ion batteries are aging, the internal resistance becomes larger, the electrolyte is dried up, and the internal short circuit is caused by the battery's own problems. The battery increases with the number of times of use, including discharging and charging, the water molecules in the battery are gradually lost, which causes the battery to generate heat in the electrochemical reaction; in addition, the battery solution forms sulfuric acid crystals during the charging and discharging process, and the precipitate is sticky. If the battery heats up due to a short circuit, the best way is to replace the battery with a new one. Therefore, when choosing lithium-ion batteries for electric vehicles, try to choose high-quality, well-reputed brand batteries. In addition, you must always keep in mind the manufacturer's instructions during the charging process, and strictly follow it, especially in the charging time, do not think that the longer the time, the greater the capacity, and the longer the time will damage the battery or even cause a fire. Too little, frequent charging and discharging, will cause a lot of damage to the lithium-ion battery. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Introduction to the maintenance of electric vehicle batteries