Why does the battery get hot during charging?
2 Answers
Car battery and charger mismatch, causing the electric vehicle battery to heat up during charging. Here is some information about car batteries: 1. Function: Car battery, also known as a storage battery, is a type of battery that plays a crucial role in the operation of a car. If the car battery fails to supply power normally, the engine will encounter problems. Car owners should regularly inspect their batteries—weekly in summer and biweekly in winter. 2. Factors affecting battery lifespan: Vehicle condition, road conditions, and driver habits; good driving habits can extend the battery's service life.
My car battery used to get extremely hot while charging, to the point of being too hot to touch. After checking it myself, I finally found the cause. It's normal for a battery to get a little warm during charging due to the heat generated by chemical reactions, but excessive heat is not a good sign. It could be due to a faulty charger that's set to too high a voltage, causing overcharging and making the battery boil inside. Alternatively, the battery might be old—after several years of use, internal short circuits can occur, leading to unstable current and increased heat. Another time, I found that the battery terminals were loose, causing poor contact and increased resistance, which converted electrical energy into heat and wasted it. I recommend starting with the simple checks first: inspect the charger and the connections. If the battery continues to overheat, stop charging it immediately—it's safer to replace the battery rather than risk damage or even an explosion. Always use a standard charger and avoid charging in high-temperature environments—these are lessons I learned the hard way.
