A sintering furnace for topcon cell production

Abstract

The utility model belongs to solar cell manufacturing technology field, specifically speaking is a kind of sintering furnace for topcon battery production, including furnace body, the top side of furnace body is equipped with lifting cylinder, the telescopic link of lifting cylinder penetrates the top side wall of furnace body, the telescopic link bottom of lifting cylinder is fixed with mounting plate, through the use of lifting cylinder and electric heating tube cooperation, electric heating tube and the distance between battery piece can be flexibly adjusted, to accurately control sintering temperature, this dynamic adjustment capacity makes sintering temperature can be according to different process requirement real-time optimization, ensure that battery piece completes sintering under the best temperature condition, effectively improves sintering quality and yield, secondly, partition plate is connected with mounting plate by connecting rod, can swing up and down in air passage, to change the air passage cross section area, realize the flexible regulation of air volume, can match air volume according to the power of electric heating tube and the distance of battery piece spacing, make the heat distribution in sintering process more uniform.

Description

Technical Field

[0001] This utility model belongs to the field of solar cell manufacturing technology, specifically a sintering furnace for producing Topcon cells. Background Technology

[0002] With the continuous development of solar cell technology, Topcon cells, as a high-efficiency solar cell technology, have received widespread attention due to their high conversion efficiency and good performance. In the production process of Topcon cells, the sintering process is one of the key links, which directly affects the electrical performance and reliability of the cells.

[0003] Traditional sintering furnaces typically use heating elements in fixed positions, making it difficult to flexibly adjust the heating distance and power according to the actual needs of the solar cells. This static heating method results in poor uniformity of sintering temperature, easily leading to localized overheating or underheating, which in turn affects the sintering quality of the solar cells and reduces the yield. The airflow adjustment function of existing sintering furnaces is relatively simple and cannot be precisely adjusted according to the dynamic requirements of the sintering process, affecting sintering efficiency and causing fluctuations in the surface temperature of the solar cells, which in turn affects the sintering quality. Therefore, a sintering furnace for Topcon battery production is proposed to address the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, which use heating elements in fixed positions and make it difficult to flexibly adjust the heating distance and power according to the actual needs of the battery cells, this invention proposes a sintering furnace for Topcon battery production.

[0005] The technical solution adopted by this utility model to solve its technical problem is a sintering furnace for the production of Topcon batteries, including a furnace body, a lifting cylinder installed on the top side of the furnace body, the telescopic rod of the lifting cylinder passing through the top side wall of the furnace body, and an installation plate fixed at the bottom end of the telescopic rod of the lifting cylinder.

[0006] The furnace body has a directional hole on its top side wall, and a guide rod is vertically inserted into the directional hole. The bottom end of the guide rod is fixed to the top side of the mounting plate. A lifting frame is fixed to the bottom side of the guide rod, and an electric heating tube is mounted on the lifting frame.

[0007] An installation plate is provided at one end of the furnace body, and an upper air inlet plate and a lower air inlet plate are fixed on the inner side of the installation plate respectively.

[0008] The fan has an air hole on the bottom side of the mounting plate, and the fan is installed at the port of the air hole. The upper air inlet plate and the lower air inlet plate are located on the upper and lower sides of the air hole, respectively, and an air passage is formed between the upper air inlet plate and the lower air inlet plate.

[0009] The first protective plate has an air inlet in the middle and a mounting base is installed on one side of the first protective plate. A partition plate is rotatably installed on the mounting base. A connecting rod is hinged to the bottom side of the partition plate, and one end of the connecting rod is hinged to one side of the mounting plate.

[0010] Preferably, one end of the partition plate is located between the air passages of the upper air intake plate and the lower air intake plate, and the connecting rod is located inside the air intake.

[0011] Preferably, a guide pipe is installed on the upper side of the mounting plate, the guide pipe is connected to the cavity inside the mounting plate, and the other end of the guide pipe is connected to a diversion pipe. A nozzle is installed on the diversion pipe, and the port of the nozzle is inclined downward, which can achieve effective dust cleaning by exhausting gas. Even when the gas at the diversion point is minimal, it can still meet the cleaning of the sintering surface of the battery cell.

[0012] Preferably, a conveyor frame is provided on the bottom side of the furnace body, and rotating rollers are rotatably installed at both ends of the conveyor frame. Two transmission tracks are fitted on the outer sides of the two rotating rollers, and a wire mesh is fixed between the two transmission tracks. A drive motor is installed on the outer side of one end of the conveyor frame, and the drive shaft of the drive motor is connected to the rotating rollers through a coupling, which can cooperate to realize the sintering and conveying operation of solar cells.

[0013] Preferably, exhaust holes are provided on the lower part of both side walls of the furnace body. A sliding buckle is installed on the outside of the exhaust hole, and an installation frame is slidably installed inside the sliding buckle. A cloth bag is sewn onto the installation frame. A protective cover is fixed on the outside of the furnace body. The protective cover is located outside the cloth bag and can filter the exhaust gas through the cloth bag to prevent the direct discharge of sintering impurity gases.

[0014] Preferably, a second protective plate is fixed to the other end of the furnace body. Thermometers are respectively installed on the lower part of the opposite side of the second protective plate and the first protective plate. A control box is installed on the outer side wall of the furnace body. The control box is used to receive the measurement data of the two thermometers and can realize the monitoring of the temperature inside the cavity. The monitored temperature data can better realize the power regulation of the heating element inside the cavity.

[0015] Preferably, the control box is used for starting and stopping the lifting cylinder, fan and electric heating tube.

[0016] The advantages of this utility model are:

[0017] This sintering furnace, through the combined use of a lifting cylinder and an electric heating tube, can flexibly adjust the distance between the electric heating tube and the solar cell, thereby precisely controlling the sintering temperature. This dynamic adjustment capability allows the sintering temperature to be optimized in real time according to different process requirements, ensuring that the solar cell is sintered under optimal temperature conditions, effectively improving sintering quality and yield. Secondly, the partition plate is connected to the mounting plate via a connecting rod, and can swing up and down in the air duct, thereby changing the cross-sectional area of ​​the air duct and realizing flexible adjustment of the air volume. It can match the air volume according to the power of the electric heating tube and the distance from the solar cell, making the heat distribution during the sintering process more uniform, further optimizing the sintering effect, and providing a strong guarantee for the high-quality sintering of solar cells.

[0018] During the air intake process, the nozzle can spray gas onto the sintering surface of the battery cell, which plays a cleaning role, removing impurities and dust from the sintering surface, ensuring the cleanliness of the sintering surface, thereby improving the quality and performance of the sintered product. This sintering furnace improves sintering quality, optimizes production efficiency, and ensures production safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of the whole system.

[0021] Figure 2 This is a schematic diagram of the overall semi-sectional three-dimensional structure;

[0022] Figure 3 This is a schematic diagram of the overall top-down structure;

[0023] Figure 4 for Figure 3 Schematic diagram of sectioning along the middle AA line;

[0024] In the diagram: 1. Furnace body, 2. Control box, 3. Guide rod, 4. Lifting cylinder, 5. Guide pipe, 6. Diverter pipe, 7. Nozzle, 8. Drive track, 9. Wire mesh, 10. Rotating roller, 11. Conveyor frame, 12. Fan, 13. Protective cover, 14. Drive motor, 15. Mounting frame, 16. Cloth bag, 17. Sliding buckle, 18. Mounting plate, 19. Lifting frame, 20. Heating element, 21. Thermometer, 22. First protective plate, 23. Mounting base, 24. Air inlet, 25. Divider plate, 26. Upper air inlet plate, 27. Lower air inlet plate, 28. Connecting rod, 29. Second protective plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] Please see Figure 1-4 As shown, a sintering furnace for producing Topcon batteries includes a furnace body 1. A lifting cylinder 4 is installed on the top side of the furnace body 1. The telescopic rod of the lifting cylinder 4 passes through the top side wall of the furnace body 1. An installation plate 18 is fixed to the bottom end of the telescopic rod of the lifting cylinder 4.

[0027] The furnace body 1 has a directional hole on its top side wall, and a guide rod 3 is vertically inserted into the directional hole. The bottom end of the guide rod 3 is fixed to the top side of the mounting plate 18. A lifting frame 19 is fixed to the bottom side of the guide rod 3, and an electric heating tube 20 is mounted on the lifting frame 19.

[0028] An installation plate is provided at one end of the furnace body 1, and an upper air inlet plate 26 and a lower air inlet plate 27 are fixed on the inner side of the installation plate respectively.

[0029] The fan 12 has an air hole on the bottom side of the mounting plate, and the fan 12 is installed at the port of the air hole. The upper air inlet plate 26 and the lower air inlet plate 27 are located on the upper and lower sides of the air hole, respectively, and an air passage is formed between the upper air inlet plate 26 and the lower air inlet plate 27.

[0030] A first protective plate 22 has an air inlet 24 in the middle. A mounting base 23 is installed on one side of the first protective plate 22. A partition plate 25 is rotatably installed on the mounting base 23. A connecting rod 28 is hinged to the bottom side of the partition plate 25, and one end of the connecting rod 28 is hinged to one side of the mounting plate 18.

[0031] During operation, when the mounting plate 18 moves up and down during the sintering of the battery cells, the position of the partition plate 25 can be adjusted with the cooperation of the connecting rod 28. One end of the partition plate 25 swings up and down in the air passage formed between the upper air inlet plate 26 and the lower air inlet plate 27. When the partition plate 25 swings upward, the space between the partition plate 25 and the lower air inlet plate 27 becomes larger, which can adjust the air volume into the cavity of the furnace body 1 through the diversion pipe 6, and can cooperate with the heating tube 20 to better sinter the battery cells.

[0032] When one end of the partition plate 25 swings downward, the space between the partition plate 25 and the lower air inlet plate 27 becomes smaller, which can adjust the air volume of the cavity into the furnace body 1 through the diversion pipe 6. It can adapt to the operating power of the electric heating tube 20 and the distance between the electric heating tube 20 and the spacing of the battery cells. With the help of the air force, it can achieve better sintering of the battery panels.

[0033] One end of the partition plate 25 is located between the air passages of the upper air intake plate 26 and the lower air intake plate 27, and the connecting rod 28 is located inside the air intake port 24.

[0034] A guide pipe 5 is installed on the upper side of the mounting plate. The guide pipe 5 is connected to the cavity inside the mounting plate. The other end of the guide pipe 5 is connected to a split pipe 6. A nozzle 7 is installed on the split pipe 6. The port of the nozzle 7 is tilted downward.

[0035] A conveyor frame 11 is provided on the bottom side of the furnace body 1. Rotating rollers 10 are rotatably installed at both ends of the conveyor frame 11. Two transmission tracks 8 are fitted on the outer side of the two rotating rollers 10. A wire mesh 9 is fixed between the two transmission tracks 8. A drive motor 14 is installed on the outer side of one end of the conveyor frame 11. The drive shaft of the drive motor 14 is connected to the rotating rollers 10 through a coupling.

[0036] Vent holes are provided on the lower part of both side walls of the furnace body 1. A sliding buckle 17 is installed on the outside of the vent holes. An installation frame 15 is slidably installed inside the sliding buckle 17. A cloth bag 16 is sewn onto the installation frame 15. A protective cover 13 is fixed on the outside of the furnace body 1. The protective cover 13 is located outside the cloth bag 16. During the sintering process, after the gas enters the sintering chamber of the furnace body 1, the gas is discharged through the vent holes on the side. With the cooperation of the cloth bag 16, the discharged gas can be filtered, and the protective cover 13 provides protection to prevent direct injection of hot air and achieve safe production operation.

[0037] A second protective plate 29 is fixed to the other end of the furnace body 1. Thermometers 21 are installed on the opposite sides of the second protective plate 29 and the first protective plate 22, respectively. A control box 2 is installed on the outer side of the side wall of the furnace body 1. The control box 2 is used to receive the measurement data of the two thermometers 21, and can monitor the temperature inside the cavity. The monitored temperature data can better control the power of the heating element inside the cavity.

[0038] The control box 2 is used to control the start and stop of the lifting cylinder 4, the fan 12 and the electric heating tube 20, and can drive and adjust the sintering temperature.

[0039] Working principle: During the sintering of solar cells, the drive motor 14 drives one of the rotating rollers 10 to rotate. With the cooperation of the transmission belt 8, the wire mesh 9 can rotate under the rotation of the other rotating roller 10, thus realizing the transportation of the solar cells.

[0040] During sintering, the control box 2 can adjust the power of the heating element 20, and simultaneously operate through the lifting cylinder 4. It can adjust the height of the mounting plate 18 and the hanging frame 19, and adjust the distance between the heating element 20 and the wire mesh 9. It can adjust the sintering temperature. The temperature inside the cavity is monitored by the thermometers 21 at both ends. The control box 2 receives the temperature detection signal from the thermometers 21. The temperature inside the cavity is used to adjust the distance between the heating element 20 and the spacing between the battery cells and the operating power of the heating element 20, so as to better meet the sintering requirements.

[0041] During the sintering of the solar cells, when the mounting plate 18 moves up and down, the position of the partition plate 25 can be adjusted with the help of the connecting rod 28. One end of the partition plate 25 swings up and down in the air passage formed between the upper air inlet plate 26 and the lower air inlet plate 27. When the partition plate 25 swings upward, the space between the partition plate 25 and the lower air inlet plate 27 becomes larger, which can adjust the air volume of the furnace body 1 through the diversion pipe 6, and can cooperate with the heating tube 20 to better sinter the solar cells.

[0042] When one end of the partition plate 25 swings downward, the space between the partition plate 25 and the lower air inlet plate 27 becomes smaller, which can adjust the air volume of the cavity into the furnace body 1 through the diversion pipe 6. It can adapt to the operating power of the electric heating tube 20 and the distance between the electric heating tube 20 and the spacing of the battery cells. With the help of the air force, it can achieve better sintering of the battery panels.

[0043] During air intake, the blower 12 operates, and the gas is transported through the air passage formed by the lower air intake plate 27 and the partition plate 25. The gas is then diverted through the partition plate 25 into the cavity of the furnace body 1, which helps to regulate the temperature inside the cavity. The remaining gas is discharged through the space between the upper air intake plate 26 and the partition plate 25. During the transport process of the guide pipe 5 and the diversion pipe 6, the gas can be distributed to the nozzle 7. When the gas is discharged through the nozzle 7, the sintering surface of the fed battery cells can be cleaned, ensuring the cleanliness of the sintering surface of the battery cells and guaranteeing the sintering effect of the finished product.

[0044] During the sintering process, after the gas enters the sintering chamber of the furnace body 1, the gas is discharged through the exhaust port on the side. With the help of the filter bag 16, the discharged gas can be filtered and protected by the protective cover 13 to prevent hot air from being directly sprayed, thus achieving safe production operation.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sintering furnace for producing Topcon batteries, characterized in that: include: Furnace body (1), a lifting cylinder (4) is installed on the top side of the furnace body (1), the telescopic rod of the lifting cylinder (4) passes through the top side wall of the furnace body (1), and an installation plate (18) is fixed at the bottom end of the telescopic rod of the lifting cylinder (4). Guide rod (3), the top side wall of the furnace body (1) is provided with a directional hole, the guide rod (3) is vertically inserted in the directional hole, and the bottom end of the guide rod (3) is fixed to the top side of the mounting plate (18). The bottom side of the guide rod (3) is fixed with a hoisting frame (19), and an electric heating tube (20) is mounted on the hoisting frame (19). An installation plate is provided at one end of the furnace body (1), and an upper air inlet plate (26) and a lower air inlet plate (27) are fixed on the inner side of the installation plate respectively. The fan (12) has an air hole on the bottom side of the mounting plate, and the fan (12) is installed at the port of the air hole. The upper air inlet plate (26) and the lower air inlet plate (27) are located on the upper and lower sides of the air hole, respectively, and an air passage is formed between the upper air inlet plate (26) and the lower air inlet plate (27). The first protective plate (22) has an air inlet (24) in the middle. A mounting base (23) is installed on one side of the first protective plate (22). A partition plate (25) is rotatably installed on the mounting base (23). A connecting rod (28) is hinged to the bottom side of the partition plate (25), and one end of the connecting rod (28) is hinged to one side of the mounting plate (18).

2. The sintering furnace for producing Topcon batteries according to claim 1, characterized in that: One end of the partition plate (25) is located between the air passages of the upper air intake plate (26) and the lower air intake plate (27), and the connecting rod (28) is located inside the air intake (24).

3. The sintering furnace for producing Topcon batteries according to claim 1, characterized in that: A guide pipe (5) is installed on the upper side of the mounting plate. The guide pipe (5) is connected to the cavity inside the mounting plate. The other end of the guide pipe (5) is connected to a split pipe (6). A nozzle (7) is installed on the split pipe (6). The port of the nozzle (7) is tilted downward.

4. A sintering furnace for producing Topcon batteries according to claim 1, characterized in that: A conveyor frame (11) is provided on the bottom side of the furnace body (1). Rotating rollers (10) are rotatably installed at both ends of the conveyor frame (11). Two transmission tracks (8) are fitted on the outer side of the two rotating rollers (10). A wire mesh (9) is fixed between the two transmission tracks (8). A drive motor (14) is installed on the outer side of one end of the conveyor frame (11). The drive shaft of the drive motor (14) is connected to the rotating rollers (10) through a coupling.

5. A sintering furnace for producing Topcon batteries according to claim 1, characterized in that: The furnace body (1) has exhaust holes on the lower side of both sides. A sliding buckle (17) is installed on the outside of the exhaust hole. An installation frame (15) is slidably installed inside the sliding buckle (17). A cloth bag (16) is sewn onto the installation frame (15). A protective cover (13) is fixed on the outside of the furnace body (1). The protective cover (13) is located outside the cloth bag (16).

6. A sintering furnace for producing Topcon batteries according to claim 1, characterized in that: A second protective plate (29) is fixed at the other end of the furnace body (1). Thermometers (21) are installed on the opposite side of the second protective plate (29) and the first protective plate (22) respectively. A control box (2) is installed on the outer side of the side wall of the furnace body (1). The control box (2) is used to receive the measurement data of the two thermometers (21).

7. A sintering furnace for producing Topcon batteries according to claim 6, characterized in that: The control box (2) is used to control the start and stop of the lifting cylinder (4), the fan (12) and the electric heating tube (20).

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