TEMPERATURE DETECTION SYSTEM AND ON BOARD CHARGER

The present application provides a temperature detection system and an on board charger, the system including a heat transfer element and a temperature sensor; the heat transfer element and the temperature sensor are both located on a printed circuit board. The heat transfer element is thermally connected to the temperature sensor, and is also configured to thermally connect to the power device on the printed circuit board. The heat transfer element is configured to transfer a temperature of the power device to the temperature sensor, so that the temperature sensor detects the temperature of the power device. The heat transfer element is an electrically insulating element. The heat transfer element is thermally connected to the power device and temperature sensor.