Heat treatment device and solar cell production equipment

The utility model discloses a heat treatment device and solar cell production equipment, and belongs to the field of solar cells. The heat treatment device comprises a process cavity used for carrying out heat treatment on a battery piece in the process cavity; the transmission mechanism comprises a chain type conveyor belt used for conveying the battery pieces so as to input the battery pieces into the process cavity or output the battery pieces from the process cavity; the protective gas source is communicated with the process cavity through a gas conveying pipeline and is used for injecting protective gas into the process cavity; the preheating mechanism is arranged on the gas conveying pipeline and is used for preheating the protective gas; and the water vapor supply mechanism is communicated with the gas conveying pipeline and is used for supplying water vapor into the process cavity. The problem that the battery performance is affected by heat treatment in the air atmosphere in the current preparation p