What Causes the Plug to Heat Up When Charging a New Energy Vehicle?
2 Answers
Reasons for the plug heating up during charging of a new energy vehicle: 1. Loose plug or oxidized contact surface: A loose plug and oxidized contact surface can lead to poor contact during charging. If there is slack at the connection point during charging, the voltage between the contact 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 is not securely connected, poorly maintained, or develops a poorly conductive oxide film at the connection point during long-term operation, oxidation of the charging plug can easily result in excessive contact resistance, leading to overheating of the plug. 2. Issues with the charging port's electronic lock: Regarding the charging port, the model and size are standardized, and vehicle charging ports have 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 charging, causing the charging port to overheat. 3. Quality issues with the charging port: Due to differences in cell materials, the charging port may heat up under excessive current. 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.
I've been driving a new energy vehicle for several years and have encountered several instances of the charging plug heating up during charging, which is usually caused by poor contact. If the plug isn't inserted tightly or there's dust or oxidation on the internal terminals, the resistance increases, generating heat when current passes through. Another common reason is excessive current; some fast-charging stations have high power, and prolonged use can cause the plug to overheat. Additionally, aging plugs or sockets, such as plastic deformation or metal wear, can also lead to heating. I always advise my friends to touch the plug with their hands while charging—if it feels unusually hot, they should stop and check to avoid overheating, which could damage the equipment or even cause a short circuit. Regularly cleaning the plug and ensuring the purchase of reliable charging equipment can also prevent this issue. With proper maintenance, this problem isn't usually serious, but the key is to develop good habits.
