What Causes the Buzzing Sound When Charging a New Energy Vehicle?

[Sophie]

New energy vehicles may produce a buzzing sound during charging due to the following reasons: Dust accumulation in the charging system: Over time, dust can accumulate in the charging system, leading to louder noises. During charging, new energy vehicles generate static electricity, which attracts dust from the environment onto the charging system. This can impair heat dissipation, causing the temperature to spike immediately when the charging gun is plugged in, and the fan to operate at maximum speed continuously. Heat from current and voltage conversion components: The buzzing sound can also be caused by heat generated from components converting current and voltage, which triggers the cooling fan in the electronic control system. This is a normal phenomenon. If the ambient temperature is low and heat dissipation is efficient, the fan may not start or operate at a low speed. However, if the temperature exceeds 40 degrees, the fan will start running, and if it surpasses 50 degrees, the fan will operate at high speed, producing a noticeable buzzing sound that the owner can hear.