Sintering furnace for preparing TOPCon battery

Abstract

The sintering furnace for preparing the TOPCon battery comprises a drying area and a sintering area, the drying area is arranged on the left side of the sintering area, a drying device is arranged in the drying area, the drying device penetrates through the top of the sintering area to be connected with the interior of the sintering area, and the drying device recycles high heat of the sintering area and sends the high heat to the drying area. The products in the drying area are dried, high energy conservation and low cost are achieved, and the drying device can conduct double-face drying on the products. According to the drying device, high-temperature airflow in the sintering area can be recycled and conveyed to the drying area, then products in the drying area can be dried, heating pipes do not need to be arranged in the drying area, and meanwhile the energy saving performance is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell production and manufacturing, in particular to a sintering furnace for preparing TOPCon cells. Background Art

[0002] TOPCon cell, namely Tunnel Oxide Passivated Contact cell, is a new type of passivated contact solar cell. Due to its high photoelectric conversion efficiency and the fact that most of the current PERC process technologies can be used, it has become the development trend of high-efficiency cells. The general production process of TOPCon cells includes texturing, boron diffusion, back polishing, deposition of ultra-thin oxide layer and polysilicon, phosphorus diffusion, plasma etching, de-coating, alumina coating, PECVD front and back coating, printing and sintering. Among them, the sintering process is the last process in the production of TOPCon cells. Its main function is to sinter the metal paste printed on the front and back in the printing process, and to form all the previous processes in the sintering process. The sintering furnace, as the place where the sintering process is implemented, is usually equipped with a drying area and a sintering area. When the existing sintering furnace is in use, its drying area adopts the same heating method as the sintering area, and the drying area does not have high requirements for heat and heat flow. Therefore, the traditional method of setting a heating tube inside the drying area will lead to excessive cost, high energy consumption and poor energy saving effect. In view of this, it is necessary to propose a sintering furnace for preparing TOPCon batteries. Utility Model Content

[0003] The purpose of the utility model is to provide a sintering furnace for preparing TOPCon batteries, which recovers the high-heat airflow inside the sintering zone and transports it to the drying zone, so that the products inside the drying zone can be dried, and there is no need to set a heating tube inside the drying zone, and at the same time, it is more energy-saving.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sintering furnace for preparing TOPCon batteries includes a drying zone and a sintering zone. The drying zone is arranged on the left side of the sintering zone. A drying device is arranged inside the drying zone. The drying device passes through the top of the sintering zone and is connected to the inside of the sintering zone. The drying device recovers the high heat of the sintering zone and sends it to the drying zone to dry the products in the drying zone, so as to achieve high energy saving and low cost. The drying device can dry the products on both sides.

[0006] Preferably, the aforementioned drying device comprises a left main pipeline and a right main pipeline, a connecting pipeline is connected between the left main pipeline and the right main pipeline, and an air pump is provided at the bottom of the connecting pipeline.

[0007] Preferably, the air pump can transport the gas in the right main pipeline in the sintering zone to the left main pipeline.

[0008] Preferably, the air pump is installed on a mounting base, the mounting base is fixed to the left main pipeline and the right main pipeline and is close to the bottom, the right main pipeline is plugged into the sintering area, and the left main pipeline is plugged into the drying area.

[0009] Preferably, two diversion pipes are provided at the bottom of the aforementioned left main pipe, and the two diversion pipes can deliver the hot air of the left main pipe to the diversion seat located at the connection between the two diversion pipes. The top and bottom of the two diversion seats are symmetrically provided with a plurality of air flow holes.

[0010] Preferably, when the hot air flow reaches the inside of the left main pipe through the air pump, it will further reach the two diversion pipes, then reach the corresponding diversion seats through the two diversion pipes, and finally reach the air flow holes, which can release the hot air flow to dry the product.

[0011] Preferably, a plurality of heating tubes are provided inside the aforementioned sintering zone, and the heating tubes can raise the temperature inside the sintering zone to a specified temperature.

[0012] Preferably, air filters are provided inside the left main pipe and the right main pipe.

[0013] Preferably, the aforementioned air filter can process the toxic and harmful gases generated inside the sintering area, and then when the airflow from the sintering area is transported to the drying area, the toxic and harmful substances contained in the airflow can be reduced, further ensuring the health of the workers.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a simple structure, can recover the high-temperature airflow inside the sintering area, and transport it to the drying area, and then can dry the products inside the drying area, and then there is no need to set a heating pipe inside the drying area, which is more energy-efficient; and the air filter element can process the toxic and harmful gases generated inside the sintering area, and then when the airflow in the sintering area is transported to the drying area, the toxic and harmful substances contained in the airflow can be reduced, further ensuring the health of the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the main structure of a sintering furnace for preparing TOPCon batteries provided by the utility model;

[0016] Figure 2 A schematic diagram of the front cross-sectional structure of a sintering furnace for preparing TOPCon batteries provided by the utility model;

[0017] Figure 3The utility model provides a schematic diagram of the installation position of an air filter element of a sintering furnace for preparing TOPCon batteries.

[0018] Legend: 1. Drying area; 2. Sintering area; 3. Drying device; 31. Left main pipeline; 32. Right main pipeline; 33. Connecting pipeline; 34. Air pump; 35. Mounting seat; 36. Diverter pipe; 37. Diverter seat; 38. Air flow hole; 4. Heating tube; 5. Air filter element. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] like Figure 1-3 As shown, the utility model provides a technical solution: a sintering furnace for preparing TOPCon batteries, comprising a drying zone 1 and a sintering zone 2, the drying zone 1 is arranged on the left side of the sintering zone 2, a drying device 3 is arranged inside the drying zone 1, the drying device 3 penetrates the top of the sintering zone 2 and is connected to the inside of the sintering zone 2, the drying device 3 recovers the high heat of the sintering zone 2 and sends it to the drying zone 1, and dries the product in the drying zone 1 to achieve high energy saving and low cost, the drying device 3 can dry the product on both sides, the drying device 3 can recover the high heat airflow inside the sintering zone 2 and transport it to the drying zone 1, and then the product inside the drying zone 1 can be dried, and there is no need to arrange a heating tube 4 inside the drying zone 1, and at the same time, the energy saving is stronger, and the air filter 5 can process the toxic and harmful gases generated inside the sintering zone 2, and then when the airflow of the sintering zone 2 is transported to the drying zone 1, the toxic and harmful substances contained in the airflow can be reduced, and the health of the workers can be further guaranteed.

[0021] like Figure 1-3As shown, the utility model provides a technical solution: the drying device 3 includes a left main pipeline 31 and a right main pipeline 32, a connecting pipeline 33 is connected between the left main pipeline 31 and the right main pipeline 32, an air pump 34 is arranged at the bottom of the connecting pipeline 33, the air pump 34 can transport the gas in the right main pipeline 32 in the sintering zone 2 to the left main pipeline 31, the air pump 34 is installed on a mounting seat 35, the mounting seat 35 is fixed to the left main pipeline 31 and the right main pipeline 32 and close to the bottom, the right main pipeline 32 is plugged into the sintering zone 2, the left main pipeline 31 is plugged into the drying zone 1, and two shunt pipes 36 are arranged at the bottom of the left main pipeline 31, the two shunt pipes 36 can transport the hot air of the left main pipeline 31 to the shunt seat 37 located at the connection of the two shunt pipes 36, and the two shunt pipes 36 can be connected to the shunt seat 37 at the connection of the two shunt pipes 36. A plurality of air flow holes 38 are symmetrically provided at the top and bottom of the seat 37. When the hot air flow reaches the left main pipe 31 through the air pump 34, it will further reach the two branch pipes 36, and then reach the corresponding branch seat 37 through the two branch pipes 36, and finally reach the air flow holes 38. The air flow holes 38 can release the hot air flow to dry the product. A plurality of heating tubes 4 are provided inside the sintering area 2. The heating tubes 4 can raise the temperature inside the sintering area 2 to a specified temperature. Air filter elements 5 are provided inside the left main pipe 31 and the right main pipe 32. The air filter element 5 can process the toxic and harmful gases generated inside the sintering area 2, and then when the air flow in the sintering area 2 is transported to the drying area 1, the toxic and harmful substances contained in the air flow can be reduced, further ensuring the health of the workers.

[0022] In order to better illustrate the utility model, the following specifically describes its working process:

[0023] When using a sintering furnace for preparing TOPCon batteries, first, the product will be transported on the conveyor belts of the sintering zone 2 and the drying zone 1. At this time, the temperature inside the sintering zone 2 is much higher than that in the drying zone 1. When the product arrives at the drying zone 1, the air pump 34 can transport the gas in the right main pipe 32 in the sintering zone 2 to the left main pipe 31. When the hot air flow passes through the air pump 34 and reaches the left main pipe 31, it will further reach the two diverter pipes 36, and then reach the corresponding diverter seat 37 through the two diverter pipes 36, and finally reach the air flow hole 38. The air flow hole 38 can release the hot air flow to dry the product. At the same time, the air filter 5 can process the toxic and harmful gases generated in the sintering zone 2, and then when the air flow in the sintering zone 2 is transported to the drying zone 1, the toxic and harmful substances contained in the air flow can be reduced.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sintering furnace for preparing TOPCon batteries, comprising a drying zone (1) and a sintering zone (2), characterized in that: The drying zone (1) is arranged on the left side of the sintering zone (2), and a drying device (3) is arranged inside the drying zone (1). The drying device (3) penetrates the top of the sintering zone (2) and is connected to the inside of the sintering zone (2). The drying device (3) recovers the high heat of the sintering zone (2) and sends it to the drying zone (1).

2. A sintering furnace for preparing TOPCon batteries according to claim 1, characterized in that: The drying device (3) comprises a left main pipeline (31) and a right main pipeline (32), a connecting pipeline (33) is connected between the left main pipeline (31) and the right main pipeline (32), and an air pump (34) is provided at the bottom of the connecting pipeline (33).

3. A sintering furnace for preparing TOPCon batteries according to claim 2, characterized in that: The air pump (34) is mounted on a mounting base (35), and the mounting base (35) is fixed to the left main pipeline (31) and the right main pipeline (32) near the bottom, the right main pipeline (32) is plugged into the sintering area (2), and the left main pipeline (31) is plugged into the drying area (1).

4. A sintering furnace for preparing TOPCon batteries according to claim 3, characterized in that: Two diverter pipes (36) are provided at the bottom of the left main pipe (31). The two diverter pipes (36) can deliver hot air from the left main pipe (31) to a diverter seat (37) located at the connection between the two diverter pipes (36). A plurality of air flow holes (38) are symmetrically provided at the top and bottom of the two diverter seats (37).

5. A sintering furnace for preparing TOPCon batteries according to claim 1, characterized in that: A plurality of heating tubes (4) are arranged inside the sintering zone (2), and the heating tubes (4) can raise the temperature inside the sintering zone (2) to a specified temperature.

6. A sintering furnace for preparing TOPCon batteries according to claim 2, characterized in that: Air filter elements (5) are provided inside the left main pipeline (31) and the right main pipeline (32).

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