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What Causes the Buzzing Sound During New Energy Vehicle Charging?

2 Answers

KendraMarie

07/29/25 8:41pm

New energy vehicle charging buzzing sound reasons are as follows: Dust accumulation in charging system: Over time, dust accumulation in the charging system can also produce louder sounds. During charging, new energy vehicles generate static electricity, which attracts environmental dust to the charging system, leading to poor heat dissipation. This causes the temperature to spike immediately when the charging gun is plugged in, forcing the fan to operate at maximum speed continuously. Heat from current-voltage conversion components: The heat generated by current-voltage conversion components triggers the cooling fan of the electronic control system, which is a normal phenomenon. If the ambient temperature is low with good heat dissipation, the fan may not start or operate at low speed. However, if the temperature exceeds 40 degrees, the fan will start running, and if it exceeds 50 degrees, the fan will operate at high speed, producing a noticeable buzzing sound that the owner can hear.

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LaZane

08/14/25 5:59pm

I often hear a buzzing sound when charging my new energy vehicle, which is the cooling fan at work. During charging, the battery generates heat, and the fan must rotate at high speed to cool the battery and prevent overheating damage. Especially when using fast charging, the higher power and greater heat make the sound more noticeable, similar to the noise from an outdoor air conditioning unit. Some models' inverters produce vibration sounds when converting AC to DC, and combined with the fan's rotation, this creates the buzzing noise. High ambient temperatures or dust clogging the fan can increase the volume. As long as the charging indicator light is on normally and there are no issues with speed or mileage, there's no need to worry. I recommend regularly checking and cleaning the fan vents to reduce noise. If the sound suddenly becomes harsh or is accompanied by unusual vibrations, then it's time to visit a professional shop for inspection, as it could indicate a fan malfunction or other issues. Overall, this is a normal part of electric vehicle design.

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