The invention relates to a
bismuth telluride-based thermoelectric generating device and a manufacturing method thereof. The
bismuth telluride-based thermoelectric generating device is characterized by consisting of a perforated bracing frame, P / N-type elements, a
barrier layer, a
soldering tin layer, a low-temperature terminal
electrode, a
ceramic substrate, a
sealant, a high-temperature terminalspraying
electrode and the
ceramic substrate; the pattern of the low-temperature terminal
electrode corresponds to holes of the perforated bracing frame. The manufacturing method comprises the steps of preparing the perforated bracing frame, preparing the elements, mounting the elements,
soldering the cold terminal electrode with
tin, spaying a hot terminal electrode,
grinding the sprayed surfaceand the like; the perforated bracing frame is put on the
ceramic substrate covered by the low-temperature terminal electrode, the low-temperature terminal electrode is arranged in a hole of the bracing frame, the
bismuth telluride-based P / N-type elements are put in the holes of the bracing frame, the
soldering tin layers of the elements contact with a tin layer on the low-temperature terminal electrode, the elements are soldered on the low-temperature terminal electrode by heating; the high-temperature terminal of the device is sprayed with aluminum or aluminum
alloy and taken as the high-temperature terminal electrode, and the P / N-type elements are connected in series. The device and the method overcome the problem that the existing tin soldering devices are restricted by
operating environment and temperature, and the
rejection rate and the manufacturing cost are far less than these of
plasma spraying devices.