The invention discloses a
waste heat recovery device which comprises a microgroove flat plate
heat pipe, radiating fins, a thermoelectric power generation piece, a charging protection circuit and a storage battery. One end of the microgroove flat plate
heat pipe is attached to a
brake heating piece, the other end of the microgroove flat plate
heat pipe is attached to the heat side of the thermoelectric power generation piece, the radiating fins are installed on the
cold side of the thermoelectric power generation piece, the thermoelectric power generation piece is connected with the charging protection circuit through an
electrode, and the charging protection circuit charges the storage battery. The
waste heat recovery device saves energy and protects the environment,
waste heat of a
brake device is recycled to generate
electricity through the thermoelectric power generation technology, energy is saved, and additional
pollution is not produced; the waste heat
recovery device is high in stability, no moving part is arranged, the performance of the device is stable, the device is easy to maintain, and the service life is long; the waste heat recovery device can be applied to various transportation facilities with friction braking, and is wide in application range.