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CN-122015494-A - TOPCon battery sintering furnace

CN122015494ACN 122015494 ACN122015494 ACN 122015494ACN-122015494-A

Abstract

The application relates to the technical field of photovoltaic cell manufacturing equipment, and particularly discloses a TOPCon battery sintering furnace. The device comprises a furnace body, a heating element, a bearing rotating mechanism and a gas circulating pipeline, wherein the furnace body is internally divided from top to bottom and is communicated with a gas heating chamber and a sintering working chamber, the heating element is arranged in the gas heating chamber and is used for conveying heated gas into the sintering working chamber below, the bearing rotating mechanism is arranged in the sintering working chamber and is used for bearing and driving a battery piece to move, the inlet end of the gas circulating pipeline is communicated with an exhaust port of the sintering working chamber, and the outlet end of the gas circulating pipeline is communicated with an air inlet of the gas heating chamber and is used for guiding the gas after heat exchange in the sintering working chamber back to the gas heating chamber for reheating and recycling. The application can reduce the loss of heat in the sintering furnace, and the energy waste is caused.

Inventors

  • ZHU HAO

Assignees

  • 滁州捷泰新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20260304

Claims (10)

  1. 1. A TOPCon battery sintering furnace, comprising: the furnace body (1), the inside of the furnace body (1) is divided from top to bottom and communicated with a gas heating chamber (2) and a sintering working chamber (3); A heating element arranged in the gas heating chamber (2) and used for sending heated gas into the sintering working chamber (3) below; The bearing rotating mechanism (4) is arranged in the sintering working chamber (3) and used for bearing and driving the battery piece to move; The gas circulation pipeline (5), the entry end of gas circulation pipeline (5) with the gas vent intercommunication of sintering working chamber (3), the exit end of gas circulation pipeline (5) with the air inlet intercommunication of gas heating chamber (2) for with the gas after accomplishing the heat exchange in sintering working chamber (3) guide back gas heating chamber (2) and reheat and cyclic utilization.
  2. 2. A TOPCon battery sintering furnace according to claim 1, characterized in that the heating element is an electric heating rod, and a plurality of blast pipes (21) communicated to the sintering chamber (3) are arranged at the bottom of the gas heating chamber (2).
  3. 3. A TOPCon battery sintering furnace according to claim 2, wherein the carrying rotary mechanism (4) comprises a rotary disc (41) rotatably arranged in the sintering working chamber (3), and a driving motor (42) for driving the rotary disc (41) to rotate, and a plurality of stations (411) for placing battery pieces are uniformly arranged on the rotary disc (41) along the circumferential direction of the rotary disc.
  4. 4. A TOPCon battery sintering furnace according to claim 3, wherein the outlets of the plurality of blast pipes (21) are vertically in one-to-one correspondence with the plurality of stations (411) on the rotary disk (41).
  5. 5. A TOPCon battery sintering furnace according to claim 3, wherein a clamping assembly (6) is provided at each station (411), the clamping assembly (6) comprising clamping plates (61) provided on both sides of the station (411), and driving members (62) for driving the clamping plates (61) on both sides to move toward or away from each other to clamp or release the battery sheet.
  6. 6. The TOPCon battery sintering furnace according to claim 1, wherein a circulating air pump (51) and a gas filter are sequentially arranged on the gas circulating pipeline (5) along the air flow direction.
  7. 7. The TOPCon battery sintering furnace according to claim 6, wherein a fresh air inlet pipe (22) is communicated with the gas heating chamber (2), and a regulating valve for regulating the air inflow is arranged on the fresh air inlet pipe (22).
  8. 8. The TOPCon battery sintering furnace as set forth in claim 7, further comprising a control unit electrically connected to the heating element, the circulating air pump (51), and the driving motor (42), the control unit being configured to control the sintering furnace to sequentially perform a drying process and a high-temperature sintering process on the battery piece.
  9. 9. The TOPCon battery sintering furnace of claim 8, wherein the control unit is configured to execute the following control logic: Acquiring a gas temperature signal at an exhaust port of the sintering working chamber (3); Judging whether the process is a drying process or a sintering process currently based on the gas temperature signal; According to the determined process stage, the output of the heating element and/or the gas flow in the gas circulation line (5) is adjusted.
  10. 10. The TOPCon battery sintering furnace of claim 9, wherein the control unit is specifically configured to perform: When the gas temperature signal is lower than a first set temperature threshold value, judging a drying process, controlling the heating element to operate at a first power, and controlling the circulating air pump (51) to operate at a first flow rate; And when the gas temperature signal reaches or is higher than a second set temperature threshold value, determining that the sintering process is performed, controlling the heating element to operate at a second power higher than the first power, and increasing the opening of the regulating valve of the fresh air inlet pipe (22).

Description

TOPCon battery sintering furnace Technical Field The application relates to the technical field of photovoltaic cell manufacturing equipment, in particular to a TOPCon battery sintering furnace. Background TOPCon cells are used as a new generation of high-efficiency crystalline silicon solar cells, and metallization sintering in the production process is a key procedure. The process forms good ohmic contact and conductive electrode by heat treatment at high temperature, and the quality of silver paste or aluminum paste printed on the front and back surfaces of the battery directly determines the final conversion efficiency of the battery. The traditional tunnel furnace or vertical sintering furnace has two main problems that firstly, the energy consumption is high, the waste gas generated after high-temperature sintering is directly discharged, a large amount of waste heat carried by the waste gas is not effectively recovered, so that the energy waste is caused, and secondly, the uniformity of a thermal field is difficult to ensure. The battery piece is usually static or unidirectionally transmitted in the furnace, and uneven hot air distribution easily causes temperature difference in different positions and even in different areas of the same battery piece, so that different sintering degrees of slurry are caused, and the consistency and yield of battery performance are affected. Disclosure of Invention In order to reduce the situation of energy waste caused by heat loss in the sintering furnace, the application provides a TOPCon battery sintering furnace. The TOPCon battery sintering furnace provided by the application adopts the following technical scheme: a TOPCon battery sintering furnace, comprising: the furnace body is internally divided from top to bottom and is communicated with a gas heating chamber and a sintering working chamber; the heating element is arranged in the gas heating chamber and is used for sending heated gas into the sintering working chamber below; the bearing rotating mechanism is arranged in the sintering working chamber and is used for bearing and driving the battery piece to move; and the inlet end of the gas circulation pipeline is communicated with the exhaust port of the sintering working chamber, and the outlet end of the gas circulation pipeline is communicated with the air inlet of the gas heating chamber and is used for guiding the gas after heat exchange in the sintering working chamber back to the gas heating chamber for reheating and recycling. Further, the heating element is an electric heating rod, and a plurality of blast pipes communicated to the sintering working chamber are arranged at the bottom of the gas heating chamber. Further, bear rotary mechanism including rotating the rotary disk that sets up in the sintering working chamber, and drive rotary disk pivoted driving motor, evenly be provided with a plurality of stations that are used for placing the battery piece along its circumferencial direction on the rotary disk. Further, the outlets of the air supply pipes are respectively in one-to-one correspondence with the stations on the rotating disc in the vertical direction. Further, each station is provided with a clamping assembly, and the clamping assemblies comprise clamping plates arranged on two sides of the station and driving pieces for driving the clamping plates on two sides to move oppositely or back to clamp or release the battery piece. Further, a circulating air pump and a gas filter are sequentially arranged on the gas circulating pipeline along the air flow direction. Further, a fresh air inlet pipe is communicated with the gas heating chamber, and an adjusting valve for adjusting air inflow is arranged on the fresh air inlet pipe. Further, the battery pack drying device further comprises a control unit, wherein the control unit is electrically connected with the heating element, the circulating air pump and the driving motor, and the control unit is configured to control the sintering furnace to sequentially execute a battery pack drying process and a high-temperature sintering process. Further, the control unit is configured to execute the following control logic: Acquiring a gas temperature signal at an exhaust port of the sintering working chamber; Judging whether the process is a drying process or a sintering process currently based on the gas temperature signal; and adjusting the output power of the heating element and/or the gas flow in the gas circulation pipeline according to the judged process stage. Further, the control unit is specifically configured to perform: when the gas temperature signal is lower than a first set temperature threshold, judging a drying process, controlling the heating element to operate at a first power, and controlling the circulating air pump to operate at a first flow rate; And when the gas temperature signal reaches or is higher than a second set temperature threshold value, determining that the sinteri