Photovoltaic cell passivation annealing device

Abstract

The utility model relates to the technical field of photovoltaic cell manufacturing, and discloses a photovoltaic cell passivation annealing device which comprises an annealing box, a plurality of partition plates are arranged in the annealing box, and the partition plates divide the interior of the annealing box into a plurality of annealing chambers; the cooling assembly comprises a first air inlet pipe, second air inlet pipes, an air suction part, a flow mixing pipe and an air outlet pipe, the first air inlet pipe is used for sucking air from outside air, the first second air inlet pipe arranged in the transmission direction of the photovoltaic cells is used for sucking air from an external air supply device, and the other second air inlet pipes are used for sucking air from the previous annealing chamber; and the conveying assembly is used for conveying the photovoltaic cells. According to the photovoltaic cell passivation annealing device, the air suction part on the first air inlet pipe sucks external air into the flow mixing pipe, and the air suction part on the second air inlet pipe sucks air in an external air supply device or air in a previous annealing chamber into the flow mixing pipe, so that high-temperature air in the annealing chamber is fully utilized; and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic cell manufacturing, and more specifically, it relates to a passivation annealing apparatus for photovoltaic cells. Background Technology

[0002] Photovoltaic cells are one of the key components of solar photovoltaic power generation systems. The surface of photovoltaic cells is usually coated with a thin film to form a passivation layer, which protects the cell surface from oxidation damage, improves cell efficiency and performance, reduces energy loss, and thus extends the service life of photovoltaic modules. After passivation, photovoltaic cells need to undergo annealing to eliminate the stress generated during the coating process, improve the stability and performance of the film, promote the bonding between the film and the silicon wafer, and enhance the passivation effect. During annealing, a gradually decreasing airflow is usually blown onto the surface of the photovoltaic cell to gradually cool it down, preventing the photovoltaic cell from cooling too quickly, which could cause excessive stress inside the cell, thereby damaging the cell's structure or reducing its performance.

[0003] Existing photovoltaic cell passivation annealing equipment relies solely on an external gas supply device to blow gas at a suitable temperature onto the surface of the photovoltaic cells during annealing. However, the external gas supply device requires heating the gas, resulting in significant energy consumption. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a photovoltaic cell passivation annealing device that reduces energy consumption by utilizing high-temperature gas in the annealing chamber.

[0005] To achieve the above objectives, the technical solution of this utility model is to provide a photovoltaic cell passivation annealing apparatus, comprising:

[0006] An annealing chamber, wherein an opening is provided at the bottom of the annealing chamber, and multiple partitions are provided inside the annealing chamber, the multiple partitions dividing the interior of the annealing chamber into multiple annealing chambers;

[0007] The cooling assembly includes multiple sets of cooling assemblies, and the number of cooling assemblies is the same as the number of annealing chambers. Each annealing chamber is equipped with one cooling assembly. The cooling assembly includes a first air inlet pipe, a second air inlet pipe, an air intake section, a mixing pipe, and an air outlet pipe. The first air inlet pipe is used to draw air from the outside air. The first second air inlet pipe, which is arranged along the photovoltaic cell transmission direction, is used to draw air from an external air supply device. The remaining second air inlet pipes are used to draw air from the previous annealing chamber.

[0008] Both the first and second air inlets are equipped with air intakes, and both the first and second air inlets are connected to the air inlet of the mixing pipe. The air outlet of the outlet pipe is connected to the air outlet of the mixing pipe.

[0009] A conveying assembly for transporting photovoltaic cells, wherein the annealing box is mounted on the conveying assembly.

[0010] By using the photovoltaic cell passivation annealing device described in this utility model, the intake part on the first intake pipe draws outside air into the mixing pipe, and the intake part on the second intake pipe draws gas from the external gas supply device or high-temperature gas from the previous annealing chamber into the mixing pipe. The gas drawn in by the first and second intake pipes mixes in the mixing pipe to obtain gas at a suitable temperature, and finally flows out from the outlet pipe and blows onto the photovoltaic cells on the conveying assembly for cooling and annealing. This fully utilizes the high-temperature gas in the annealing chamber and greatly reduces energy consumption.

[0011] Preferably, the air intake includes a mounting tube, a mounting bracket, a motor, and a fan. The mounting bracket is fixedly connected inside the mounting tube, the motor is fixedly mounted on the mounting bracket, and the fan is driven by the motor. This design allows the motor to drive the fan, drawing gas into the mounting tube and then into the first or second air intake pipe.

[0012] Preferably, a filter screen is installed inside the mounting pipe. This design allows the filter screen to filter the gas entering the first and second air intake pipes, preventing external dust from entering the cooling assembly.

[0013] Preferably, the mixing tube is a serpentine bend. This design allows the gases drawn in through the first and second intake pipes to mix more evenly within the mixing tube, which is beneficial for improving the annealing effect.

[0014] Preferably, the outlet pipe includes a connecting pipe, a main pipe, and branch pipes. The connecting pipe is connected to the mixing pipe, and both the main pipe and the branch pipes are connected to the connecting pipe. This design allows the mixed airflow to be blown onto the photovoltaic cells through the main pipe and branch pipes, resulting in a more uniform gas flow rate on the surface of the photovoltaic cells.

[0015] Preferably, the inner diameter of the connecting pipe is larger than the inner diameter of the main pipe, the connection between the connecting pipe and the main pipe has a blocking surface, and the air inlet of the branch pipe is located above the blocking surface. This design ensures that sufficient gas can enter the branch pipe.

[0016] The beneficial effects of this utility model are as follows:

[0017] By using the photovoltaic cell passivation annealing device described in this utility model, the intake part on the first intake pipe draws outside air into the mixing pipe, and the intake part on the second intake pipe draws gas from the external gas supply device or high-temperature gas from the previous annealing chamber into the mixing pipe. The gas drawn in by the first and second intake pipes mixes in the mixing pipe to obtain gas at a suitable temperature, and finally flows out from the outlet pipe and blows onto the photovoltaic cells on the conveying assembly for cooling and annealing. This fully utilizes the high-temperature gas in the annealing chamber and greatly reduces energy consumption. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the photovoltaic cell passivation annealing device;

[0019] Figure 2 This is a schematic front cross-sectional view of a photovoltaic cell passivation annealing device;

[0020] Figure 3 This is a schematic diagram of the first three-dimensional structure of the air intake section;

[0021] Figure 4 This is a schematic diagram of the second three-dimensional structure of the air intake section;

[0022] Figure 5 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0023] Figure 6 This is a three-dimensional structural diagram of the air outlet pipe.

[0024] In the diagram: 100, Annealing chamber; 110, partition; 120, annealing chamber; 121, first annealing chamber; 122, second annealing chamber; 123, third annealing chamber; 124, fourth annealing chamber;

[0025] 200. Cooling component; 201. First cooling component; 202. Second cooling component; 203. Third cooling component; 204. Fourth cooling component; 210. First air inlet pipe; 220. Second air inlet pipe; 230. Intake section; 231. Mounting pipe; 232. Mounting bracket; 233. Motor; 234. Fan; 235. Filter screen; 240. Mixing pipe; 250. Air outlet pipe; 251. Connecting pipe; 252. Main pipe; 253. Branch pipe; 254. Baffle surface;

[0026] 300. Transmission component. Detailed Implementation

[0027] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0028] To better understand this utility model, the following is in conjunction with... Figures 1-6 The photovoltaic cell passivation annealing device of this utility model is described in detail.

[0029] Example 1:

[0030] like Figure 1 and Figure 2 As shown, the photovoltaic cell passivation annealing apparatus includes:

[0031] Annealing chamber 100, with an opening at the bottom, and multiple partitions 110 inside the annealing chamber 100, which divide the interior of the annealing chamber 100 into multiple annealing chambers 120.

[0032] The cooling component 200 is provided in multiple sets, and the number of cooling components 200 is the same as that of the annealing chamber 120. Each annealing chamber 120 is provided with one cooling component 200. The cooling component 200 includes a first air inlet pipe 210, a second air inlet pipe 220, an air intake section 230, a mixing pipe 240, and an air outlet pipe 250. The first air inlet pipe 210 is used to draw air from the outside air. The first second air inlet pipe 220, which is arranged along the photovoltaic cell transmission direction, is used to draw air from an external air supply device. The remaining second air inlet pipes 220 are used to draw air from the previous annealing chamber 120. The mixing pipe 240 is a serpentine bend.

[0033] The first air inlet pipe 210 and the second air inlet pipe 220 are both equipped with air intake parts 230. The first air inlet pipe 210 and the second air inlet pipe 220 are both connected to the air inlet of the mixing pipe 240. The air inlet of the outlet pipe 250 is connected to the air outlet of the mixing pipe 240.

[0034] The conveying assembly 300 is used to transport photovoltaic cells, and the annealing box 100 is mounted on the conveying assembly 300.

[0035] It should be noted that, along the transport direction of the photovoltaic cells, the temperature in the multiple annealing chambers 120 gradually decreases. The suction part 230 on the first air inlet pipe 210 draws outside air into the mixing pipe 240, and the suction part 230 on the second air inlet pipe 220 draws gas from the external gas supply device or gas from the previous annealing chamber 120 into the mixing pipe 240. The gas drawn in by the first air inlet pipe 210 and the second air inlet pipe 220 mixes in the mixing pipe 240 and finally flows out from the air outlet pipe 250 and blows onto the photovoltaic cells on the transport assembly 300 to cool and anneal the photovoltaic cells.

[0036] By adjusting the intake rate of the intake section 230, the gas flow rate blown out of the outlet pipe 250 can be adjusted, thereby adjusting the cooling and annealing efficiency. By adjusting the ratio R of the intake rate of the intake section 230 on the first inlet pipe 210 to the intake section 230 on the second inlet pipe 220 (R=v1 / v2, where v1 represents the intake rate of the intake section 230 on the first inlet pipe 210 and v2 represents the intake rate of the intake section 230 on the second inlet pipe 220), the gas temperature blown out of the outlet pipe 250 can be adjusted. The larger R is, the lower the gas temperature blown out of the outlet pipe 250. By reasonably adjusting the R value of the four cooling components 200, uniform annealing of photovoltaic cells can be achieved.

[0037] Setting the mixing tube 240 as a serpentine bend can increase the disturbance and turbulence of the airflow inside the mixing tube 240. The gas drawn in through the first air inlet pipe 210 and the second air inlet pipe 220 is mixed more evenly inside the mixing tube 240, resulting in better cooling and annealing effects for the photovoltaic cells.

[0038] In this embodiment, the annealing chamber 100 is provided with three partitions 110, dividing the annealing chamber 100 into four annealing chambers 120, namely a first annealing chamber 121, a second annealing chamber 122, a third annealing chamber 123, and a fourth annealing chamber 124 arranged sequentially along the photovoltaic cell transport direction. The cooling components 200 are provided in four sets, namely a first cooling component 201 disposed in the first annealing chamber 121, a second cooling component 202 disposed in the second annealing chamber 122, and a third cooling component disposed in the third annealing chamber 123. 203, and a fourth cooling assembly 204 disposed in the fourth annealing chamber 124, wherein the second air inlet pipe 220 of the first cooling assembly 201 draws air from an external air supply device (not shown in the figure), the second air inlet pipe 220 of the second cooling assembly 202 draws air from the first annealing chamber 121, the second air inlet pipe 220 of the third cooling assembly 203 draws air from the second annealing chamber 122, and the third air inlet pipe of the fourth cooling assembly 204 draws air from the first annealing chamber 121; the conveying assembly 300 is a conveyor belt, which is prior art and will not be described in detail here.

[0039] By using the photovoltaic cell passivation annealing device of this invention, the suction part 230 on the first air inlet pipe 210 draws outside air into the mixing pipe 240, and the suction part 230 on the second air inlet pipe 220 draws gas from the external gas supply device or high-temperature gas from the previous annealing chamber 120 into the mixing pipe 240. The gas drawn in by the first air inlet pipe 210 and the second air inlet pipe 220 is mixed in the mixing pipe 240 to obtain gas at a suitable temperature, and finally flows out from the air outlet pipe 250 and blows onto the photovoltaic cells on the conveying assembly 300 for cooling and annealing. This fully utilizes the high-temperature gas in the annealing chamber 120 and greatly reduces energy consumption.

[0040] Example 2:

[0041] As an optimization of Example 1, such as Figures 2-4 As shown, the air intake 230 includes an installation tube 231, an installation bracket 232, a motor 233, and a fan 234. The installation bracket 232 is fixedly connected to the inside of the installation tube 231. The motor 233 is fixedly installed on the installation bracket 232. The fan 234 is driven by the motor 233. A filter screen 235 is provided inside the installation tube 231.

[0042] It should be noted that the mounting pipe 231 of the suction section 230 installed in the first intake pipe 210 is connected to the first intake pipe 210, and the mounting pipe 231 of the suction section 230 installed in the second intake pipe 220 is connected to the second intake pipe 220.

[0043] If external dust enters the cooling component 200, during the cooling and annealing process, the dust will flow with the airflow and adhere to the surface of the photovoltaic cells, thus affecting the quality of the photovoltaic cells.

[0044] In this embodiment, the mounting pipe 231 of the intake section 230 installed in the first intake pipe 210 is connected to the first intake pipe 210 by a flange, and the mounting pipe 231 of the intake section 230 installed in the second intake pipe 220 is connected to the second intake pipe 220 by a flange.

[0045] The filter screen 235 is located in the opening area between the mounting tube 231 and the mounting bracket 232. External dust is blocked by the filter screen 235 and will not adhere to the fan 234, which can effectively ensure the cleanliness of the fan 234 without the need for frequent cleaning of the fan 234, thus reducing maintenance costs.

[0046] Example 3:

[0047] As an optimization of Example 2, such as Figure 2 and Figure 6As shown, the vent pipe 250 includes a connecting pipe 251, a main pipe 252, and a branch pipe 253. The connecting pipe 251 is connected to the mixing pipe 240, and the main pipe 252 and the branch pipe 253 are both connected to the connecting pipe 251.

[0048] The inner diameter of the connecting pipe 251 is larger than the inner diameter of the main pipe 252. The connection between the connecting pipe 251 and the main pipe 252 has a blocking surface 254, and the air inlet of the branch pipe 253 is located above the blocking surface 254.

[0049] It should be noted that after the gas in the mixing pipe 240 enters the connecting pipe 251, part of the gas enters the main pipe 252, and the other part of the gas is blocked by the blocking surface 254 and enters the branch pipe 253 through the air inlet above the blocking surface 254. This ensures that enough gas can enter the branch pipe 253, thereby ensuring that the gas flow rate on the surface of the photovoltaic cell is more uniform after the gas is blown from the main pipe 252 and the branch pipe 253 to the photovoltaic cell.

[0050] In this embodiment, four branch pipes 253 are provided. When the photovoltaic cell is transmitted to the direct pipe 252, that is, when the direct pipe 252 is aligned with the center of the photovoltaic cell, the four branch pipes 253 correspond to the four corners of the photovoltaic cell, so that the gas flow rate on the surface of the photovoltaic cell is more uniform.

[0051] The embodiments of the utility model have been described above with reference to the accompanying drawings. However, the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments without departing from the spirit of the embodiments and the scope of protection of the claims, and all of these forms are within the protection scope of the embodiments.

Claims

1. A photovoltaic cell passivation annealing apparatus, characterized in that, include: Annealing chamber (100), the bottom of the annealing chamber (100) is provided with an opening, and a plurality of partitions (110) are provided inside the annealing chamber (100), the plurality of partitions (110) divide the interior of the annealing chamber (100) into a plurality of annealing chambers (120). A cooling component (200) is provided in multiple sets, and the number of cooling components (200) is the same as the number of annealing chambers (120). Each annealing chamber (120) is provided with one cooling component (200). The cooling component (200) includes a first air inlet pipe (210), a second air inlet pipe (220), an air intake section (230), a mixing pipe (240), and an air outlet pipe (250). The first air inlet pipe (210) is used to draw air from the outside air. The first second air inlet pipe (220) arranged along the photovoltaic cell transmission direction is used to draw air from an external air supply device. The remaining second air inlet pipes (220) are used to draw air from the previous annealing chamber (120). The first air inlet pipe (210) and the second air inlet pipe (220) are both equipped with air intake parts (230), the first air inlet pipe (210) and the second air inlet pipe (220) are both connected to the air inlet of the mixing pipe (240), and the air inlet of the air outlet pipe (250) is connected to the air outlet of the mixing pipe (240). A conveying assembly (300) is used to convey photovoltaic cells, and the annealing box (100) is mounted on the conveying assembly (300).

2. The photovoltaic cell passivation annealing apparatus according to claim 1, characterized in that, The air intake (230) includes an installation tube (231), a mounting bracket (232), a motor (233), and a fan (234). The mounting bracket (232) is fixedly connected inside the installation tube (231), the motor (233) is fixedly mounted on the mounting bracket (232), and the fan (234) is driven by the motor (233).

3. The photovoltaic cell passivation annealing apparatus according to claim 2, characterized in that, A filter screen (235) is installed inside the installation tube (231).

4. The photovoltaic cell passivation annealing apparatus according to claim 1, characterized in that, The mixing pipe (240) is a serpentine bend.

5. The photovoltaic cell passivation annealing apparatus according to claim 4, characterized in that, The outlet pipe (250) includes a connecting pipe (251), a main pipe (252) and a branch pipe (253). The connecting pipe (251) is connected to the mixing pipe (240), and the main pipe (252) and the branch pipe (253) are both connected to the connecting pipe (251).

6. The photovoltaic cell passivation annealing apparatus according to claim 5, characterized in that, The inner diameter of the connecting pipe (251) is larger than the inner diameter of the main pipe (252). The connection between the connecting pipe (251) and the main pipe (252) has a blocking surface (254). The air inlet of the branch pipe (253) is located above the blocking surface (254).

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