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What causes the charger to make noise when charging an electric vehicle?

1 Answers

LaCorey

07/29/25 7:20pm

Here are the reasons why the charger makes noise when charging an electric vehicle: 1. The cooling fan inside the battery charger has been used for too long, and there is dust on the fan or insufficient oil on the fan roller. In this case, adding lubricating oil to the fan roller or cleaning the dust on the fan can solve the problem. 2. If the high-frequency magnetic core inside the charger is loose. You can tighten it with a piece of paper and then seal it with paraffin or hot melt adhesive. The charger of an electric vehicle will also generate heat. To prevent overheating and damaging the charger, a fan is often installed inside for cooling. Initially, due to sufficient lubrication, the noise will be minimal and hardly noticeable. However, as the usage time increases, more dust accumulates inside, reducing the lubrication effect of the fan, which naturally leads to louder noise.

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