Thermal diode device for a telematic control unit of a vehicle

A thermal diode device comprising a vehicle telematic control unit to be cooled, a roof, a temperature sensor for measuring the temperature of the roof, and an actuator configured to thermally disconnect the telematic control unit from the roof if the temperature of the roof is higher than a reference temperature, so as to inhibit any conductive heat transfer between the roof and the telematic control unit, and to conductively thermally connect the telematic control unit to the roof if the temperature of the roof is lower than the reference temperature, so as to allow a conductive heat transfer between the telematic control unit and the roof, the telematic control unit comprising an integral thermal pad providing a thermal interface between said telematic control unit and the roof when said telematic control unit and said roof are in physical contact, wherein the actuator comprises a spring connected between the roof and the thermal pad of the telematic control unit in order to exert on the thermal pad of the telematic control unit (1) a repulsive force that repulses said telematic control unit away from the roof, and an electromagnet attached to the roof in order to exert, when it is supplied with power, an attractive force on the thermal pad of the telematic control unit in the direction of the roof.