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Why does the plug of a new energy vehicle get hot during charging?

1 Answers

McAngelina

07/30/25 10:07am

New energy vehicle plug heating during charging is mainly caused by issues such as loose plugs. Below is a detailed explanation: Loose plug and oxidized contact surface: A loose plug and oxidized contact surface can lead to poor contact during charging. If there is slack contact at the connection points during charging, the voltage between the points can be sufficient to break down the air gap, forming an arc and sparking, which may ignite nearby flammable materials and cause a fire. If the charging port connection is not secure, maintenance is poor, or an oxide film that conducts poorly forms at the joint during long-term operation, the oxidized charging plug can easily cause excessive contact resistance, leading to overheating of the plug. Issues with the charging port electronic lock: Regarding the charging port, the model and size are standardized, and the vehicle charging port has corresponding regulations for safety requirements such as current. The charging port should be equipped with an electronic locking device to prevent accidental disconnection during charging. When the electronic lock is engaged, the charging port may still continue to charge, causing the charging port to overheat. Quality issues with the charging port: Due to differences in cell materials, the charging port may heat up when the current is too high. However, different materials have varying heat dissipation properties. If the material is of poor quality, it may lead to inadequate heat dissipation, resulting in overheating.

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