During the charging process of new energy electric vehicles, due to the large charging current, especially when the charging current is large, the temperature of the charging gun will rise, and the shell of the charging gun will expand due to heat, making it difficult to remove the charging gun from the charging socket after charging. There will also be safety hazards. 

At present, charging guns are equipped with a temperature detection system, and the temperature sensor plays a very important role. The characteristics of the temperature sensor are used to set the temperature value, thereby controlling the temperature of the charging gun. The temperature sensor in the charging gun monitors the temperature of the charging gun plug and the controller board. The plug temperature sensor monitors the temperature status of the plug and socket in real-time. The motherboard temperature sensor monitors the temperature shape of the main controller in real-time. 

When the charging temperature reaches the preset temperature, the temperature control system of the charging gun will automatically start to reduce the charging power and limit the temperature rise. If the temperature continues to rise and reaches the preset temperature again, the temperature control system will automatically cut off the power and stop charging. After the temperature drops, the charging system will restart. This can effectively prevent safety hazards such as spontaneous combustion or socket melting due to high temperatures during charging. 

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