What Causes Noise During Car Charging?
2 Answers
It is normal for a car to make noise during charging, mainly due to the following reasons: Sound generated by electric current during charging. Sound produced by the transformer during operation. Sound generated by the fan inside the charger. Additional Information: Car charging methods are generally divided into two types: Slow Charging: Slow charging uses an AC charging pile interface, which inputs AC power from the grid into the car's slow charging port. The onboard charger then converts the AC power into DC power before feeding it into the battery to complete charging. Fast Charging: Fast charging uses a DC charging pile interface, which converts AC power from the grid into DC power and delivers it directly to the car's fast charging port, allowing the electricity to enter the battery directly for charging.
It's quite common for cars to make noises while charging, and I think it's mainly some normal operational sounds. For example, the cooling fan will produce a whirring sound when it's running to dissipate heat, especially during fast charging when the battery heats up quickly and the fan speed increases, making the noise louder. There's also the clicking sound from relays or switches when they switch circuits, which is completely normal if it's not frequent. However, if you hear abnormal noises, like continuous buzzing or squeaking, there might be an issue, such as poor circuit contact, internal component failure in the charger, or abnormal sounds caused by battery aging. I always advise fellow car owners not to panic immediately—first, determine whether the sound is occasional or persistent. If it's the latter, quickly check whether the charging equipment connection is secure, and if necessary, try using another socket to rule out simple issues. After all, safety comes first, and we shouldn't let small oversights lead to worse situations.
