A device and process for passivation treatment of edge coating of a TOPCon cell

Abstract

The application discloses a TOPCon solar cell edge coating and passivation treatment device and process, relates to the technical field of solar cell manufacturing, and aims to solve the technical problem of poor passivation effect of the side edge of a solar cell after cutting in the stacking mode of the solar cell by adopting ALD, and comprises a reaction tank body, a base, a laminating mechanism and a functional mechanism. The solar cell is placed in the gap between two partitions, the sealing gasket A is used for isolating the passivation gas, the surface of the solar cell is protected, the gas groove, the corresponding two sealing gaskets A and the surface of the solar cell jointly form a protection gas cavity, the protection gas is introduced into the protection gas cavity, the gas curtain isolation layer in the protection gas cavity further protects the surface of the solar cell, the passivation gas is limited in the cutting area, the gas curtain isolation layer reduces the extrusion contact requirement of the sealing gasket A and the solar cell, and thus the damage of the solar cell is reduced.

Description

Technical Field

[0001] This invention relates to the field of solar cell manufacturing technology, and more specifically, to a TOPCon cell edge coating passivation treatment apparatus and process. Background Technology

[0002] During the cutting and separation process, TOPCon batteries still suffer from performance loss due to the creation of new unpassivated sides. After the batteries are sliced, a certain number of batteries are stacked and passivated using technologies such as ALD to passivate the sides after cutting, thus repairing the cutting loss and improving the overall performance of TOPCon batteries.

[0003] After TOPCon batteries are stacked, there is a gap between two adjacent batteries, which makes it easy for the slit coating to be deposited onto the grid pads on the battery surface to avoid affecting the welding pull. In addition, the slit coating is prone to deflection, which affects the appearance of the battery and results in poor passivation treatment of the battery edge coating. In view of this, we propose a TOPCon battery edge coating passivation treatment device and process. Summary of the Invention

[0004] The purpose of this invention is to provide a TOPCon battery edge coating passivation treatment device and process to solve the technical problem of poor side passivation effect after battery cutting by using ALD through battery stacking.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a TOPCon battery edge coating passivation treatment device, including a reaction tank body, the reaction tank body is hollow to form a reaction chamber, a base is fixed at the bottom of the reaction chamber, a stacking mechanism is fixed at the top of the base, and a functional mechanism is provided on the reaction tank body;

[0006] The stacking mechanism includes a U-shaped base, several partitions, a pitch-changing component, and two elastic components. The U-shaped base is fixed to the top of the base. The U-shaped base has several partitions arranged in a linear and equally spaced structure. The U-shaped base is provided with a pitch-changing component for adjusting the gap between any two adjacent partitions. Both ends of the inner surface of the U-shaped base are provided with elastic components.

[0007] Air grooves are provided at the opposite ends of any two adjacent partitions. Sealing gaskets A are provided on both sides of the air grooves. Sealing gaskets A are fitted and connected to the partitions. The partitions and the four movable grooves are slidably connected through movable guide blocks. Sealing gaskets B are embedded in the partition at the top. Sealing gaskets B are movably connected to the horizontal part of the U-shaped seat.

[0008] The gas groove, the two corresponding sealing gaskets A, and the battery surface together form a protective gas cavity. This invention protects the battery surface by placing the battery between two partitions and using the sealing gaskets A to isolate the passivating gas. Furthermore, by setting up the gas groove, the two corresponding sealing gaskets A, and the battery surface together to form a protective gas cavity, and introducing a protective gas (such as nitrogen or an inert gas) into the protective gas cavity, the gas curtain isolation layer within the protective gas cavity further protects the battery surface. This protection confines the passivating gas to the cutting area, and the gas curtain isolation layer reduces the need for pressure contact between the sealing gaskets A and the battery, thereby reducing battery damage. This solves the technical problem of poor side passivation effect after battery cutting using ALD (Alternating Current Deposition) through battery stacking.

[0009] Preferably, two turntables are rotatably provided in the middle of the reaction chamber, the two turntables are arranged in an upper and lower structure, and the two turntables are fixedly connected by several vertical plates arranged in a ring with equal spacing. Two ventilation units A are symmetrically connected on one side of the reaction tank body.

[0010] Preferably, the base is fixed to the bottom of the reaction chamber, and an installation groove is provided in the base. A micro motor is fixed in the installation groove. Two centripetal grooves are opened in parallel at the top of the base. A movable ring A is movably provided in the centripetal groove. A rotating arc groove is connected to the eccentric end of one of the centripetal grooves.

[0011] Preferably, the inner surface of the U-shaped seat has movable cavities at both ends, and the movable cavities have a plurality of slots arranged in a linear and equidistant structure. Movable slots are also provided on both sides of the movable cavities.

[0012] Preferably, the variable pitch assembly includes four slide rods, which are rotatably disposed in four movable slots. The bottom end of one slide rod passes through the mounting slot and is fixedly connected to the output end of the micro motor. The slide rod has a plurality of lifting guide slots with a linear and equidistant structure. Ball blocks are movably connected to the lifting guide slots. The four movable guide blocks located at the bottom end are rotatably connected to the four slide rods respectively. The remaining movable guide blocks are movably connected to the corresponding slide rods respectively. The plurality of ball blocks are fixedly connected to the corresponding plurality of movable guide blocks respectively.

[0013] The lifting distance of the lower lifting guide groove is less than that of the upper lifting guide groove, and the difference in lifting distance between any two adjacent lifting guide grooves is equal.

[0014] Preferably, the bottom end of the lifting guide groove is connected to a limiting arc groove, and the gap distance between any two adjacent limiting arc grooves is equal.

[0015] Preferably, the elastic component includes a sliding plate and two ventilation units B. The two sliding plates are slidably disposed in the two movable cavities. The sliding plates and the movable cavities are elastically connected by a plurality of evenly arranged springs. An elastic pad is embedded in one end of the sliding plate near the air groove. The elastic pad has a plurality of through grooves A at the positions of the plurality of protective air cavities. The sliding plate has a plurality of through grooves B for connecting two adjacent through grooves A. An elastic block is fixed on the through groove B. The plurality of elastic blocks are fixedly connected to the plurality of empty grooves. The elastic block has a through cavity at one end near the air groove.

[0016] A plurality of the aforementioned protective air chambers, a plurality of through slots A and a plurality of the aforementioned through slots B are connected to form a functional air chamber, and the functional air chamber has a folded structure;

[0017] The two ventilation units B are respectively connected to the two protective air chambers located at both ends, and the ventilation units B are connected to the outside.

[0018] Preferably, the cavity has two symmetrically arranged rigid plates, which are fixedly connected to the slide plate, and the gap between the two rigid plates forms a pressure cavity.

[0019] Preferably, the functional mechanism includes a geared motor, an adjusting circular plate, and a functional plate; the geared motor is fixedly mounted on the top of the reaction vessel body, the adjusting circular plate is rotatably mounted on the top of the reaction chamber, a connecting shaft is fixedly mounted on the top of the adjusting circular plate, the connecting shaft is rotatably connected to the reaction vessel body, the top of the connecting shaft extends out of the top of the reaction vessel body and is fixedly connected to the output end of the geared motor, the bottom end of the adjusting circular plate is provided with an inclined guide groove A and an adaptive guide groove respectively opposite to the two centripetal grooves, both the inclined guide groove A and the adaptive guide groove are movably provided with a movable ring B, the eccentric end of the inclined guide groove A is connected to the inclined guide groove B, the eccentric end of the adaptive guide groove is connected to the arc guide groove, the functional plate is disposed in the gap between the adjusting circular plate and the base, both ends of the functional plate are rotatably provided with movable rods, the two ends of the movable rods are rotatably connected to the movable ring B and the movable ring A respectively.

[0020] A process for edge coating passivation treatment of TOPCon batteries, applicable to the aforementioned battery edge coating passivation treatment apparatus, includes the following steps:

[0021] S1: Battery placement;

[0022] Batteries are placed in the gap between any two adjacent partitions;

[0023] S2: Use of functional mechanisms;

[0024] S2.1: The output end of the geared motor of the external control mechanism rotates, so that the function board first rotates and then moves centripetally to flatten the passivation edges of several batteries to be coated, so that the passivation edges of several batteries to be coated are in the same plane, which facilitates the passivation of the edges of several batteries to be coated.

[0025] S2.2: Causes the output of the speed reduction motor to rotate in the opposite direction through the external control mechanism, so that the function board is in the initial position;

[0026] S3: Battery mounting;

[0027] The micro motor output is rotated by an external control mechanism, and the ball moves to the limiting arc groove. The gap between two adjacent partitions is minimized, so that the air groove, the two corresponding sealing gaskets A, and the battery surface together form a protective air cavity. Protective gas is introduced into the protective air cavity, so that the air curtain isolation layer in the protective air cavity further protects the battery surface. The protection confines the passivating gas to the cutting area. The air curtain isolation layer reduces the squeezing contact requirement between the sealing gasket A and the battery, thereby reducing battery damage.

[0028] S4: Battery edge coating passivation treatment;

[0029] The passivation gas is introduced and discharged through two ventilation units A, which causes the gas to drive the turntable and several vertical plates to rotate. This rotation of the gas in the reaction chamber optimizes the uniformity of airflow. The functional plate also blocks the rotating gas in the reaction chamber to increase the concentration of passivation gas in the cutting area, thereby increasing the deposition rate during the passivation of the battery edge coating.

[0030] The beneficial effects of this invention are:

[0031] 1. This invention protects the surface of a solar cell by placing it between two partitions and using a sealing gasket A to isolate the passivating gas. A protective gas chamber is formed by an air groove, the two corresponding sealing gaskets A, and the solar cell surface. A protective gas, such as nitrogen or an inert gas, is introduced into the protective gas chamber, creating an air curtain isolation layer that further protects the solar cell surface. This protection confines the passivating gas to the cutting area and reduces the need for pressure contact between the sealing gasket A and the solar cell, thus reducing damage to the solar cell. This invention solves the technical problem of poor side passivation effect after cutting solar cells using ALD (Alternating Current Deposition) in solar cell stacking.

[0032] 2. This invention, through the structural design of the elastic components, allows the two elastic components to initially correct the battery laterally when it is placed between them. The elastic pads also provide protection for the battery during the passivation process. However, since the battery sizes are not exactly the same, a large elastic force is required to make the elastic pads fit close to the battery edges, which can easily damage the edges of larger batteries. This invention also designs several protective air chambers, several through-slots A, and several through-slots B connected to form a functional air chamber. The functional air chamber has a folded structure, requiring only two ventilation units B to control the air intake and exhaust, reducing the device size. Furthermore, the protective gas within the functional air chamber can enter the pressure chamber to apply pressure to the elastic pads. This pressure balances the contact force between the elastic pads and each battery, ensuring the elastic pads fit tightly against the remaining edges of the battery while reducing the elastic force requirement and further improving the protection of the remaining battery edges.

[0033] 3. This invention, through the structural design of the functional mechanism, enables the output end of the reduction motor of the external control mechanism to rotate, thereby adjusting the rotation of the circular plate. This allows two movable rings B to move in the inclined guide groove B and the arc guide groove, respectively. One movable ring A moves on the rotating arc groove, while the other movable ring A remains stationary at the eccentric end of the centripetal groove. This allows the functional plate to rotate first, and then the two movable rings B move in the inclined guide groove A and the adaptive guide groove, respectively. The adaptive guide groove is designed with an inclination relative to the inclined guide groove A, allowing the two movable rings A to move in the two centripetal grooves. This causes the functional plate to move centripetally, flattening several battery edges to be coated and passivated, so that the positions of several battery edges to be coated and passivated are on the same plane, facilitating the edge coating and passivation of several batteries. When the functional plate is in the initial position, it shields the rotating gas in the reaction chamber to increase the passivation gas concentration in the cutting area, thereby further improving the deposition rate during battery edge coating and passivation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention. Figure 1 ;

[0036] Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention. Figure 2 ;

[0037] Figure 4 This is a schematic diagram of the structure of the turntable and the upright plate of the present invention;

[0038] Figure 5 This is a schematic diagram of the base, stacking mechanism, and energy mechanism of the present invention;

[0039] Figure 6 This is a cross-sectional structural diagram of the stacking mechanism of the present invention;

[0040] Figure 7 for Figure 6 Enlarged schematic diagram of part A;

[0041] Figure 8 This is a cross-sectional structural diagram of the base and the stacking mechanism of the present invention;

[0042] Figure 9 This is a partial structural schematic diagram of the base and stacking mechanism of the present invention;

[0043] Figure 10 for Figure 9 Enlarged schematic diagram of section B structure;

[0044] Figure 11 This is a schematic diagram of the slide bar of the present invention;

[0045] Figure 12 This is a schematic diagram of the structure of the elastic component of the present invention;

[0046] Figure 13 This is a partial structural breakdown diagram of the base and energy mechanism of the present invention;

[0047] Figure 14 This is a schematic diagram of the movement state of the functional board in this invention. Figure 1 ;

[0048] Figure 15 This is a schematic diagram of the movement state of the functional board in this invention. Figure 1 ;

[0049] Figure 16 This is a schematic diagram of the movement state of the functional board in this invention. Figure 1 .

[0050] Explanation of the labels in the diagram:

[0051] 1. Reactor body; 2. Base; 3. Stacking mechanism; 4. Functional mechanism;

[0052] 11. Turntable; 12. Vertical panel; 13. Ventilation unit A;

[0053] 21. Mounting slot; 22. Miniature motor; 23. Centripetal groove; 24. Movable ring A; 25. Rotating arc groove;

[0054] 31. U-shaped seat; 32. Partition plate; 33. Pitch variable assembly; 34. Flexible assembly;

[0055] 311. Movable cavity; 312. Empty slot; 313. Movable groove; 314. Movable guide block;

[0056] 321. Air groove; 322. Sealing gasket A; 323. Sealing gasket B;

[0057] 331. Slide bar; 332. Lifting guide groove;

[0058] 3321. Limiting arc groove;

[0059] 341. Slide board; 342. Spring; 343. Elastic pad; 344. Through slot A; 345. Through slot B; 346. Elastic block; 347. Through cavity; 348. Ventilation unit B; 349. Adaptor rigid board;

[0060] 40. Coupling; 41. Gear motor; 42. Adjusting disc; 43. Function panel;

[0061] 421. Inclined guide groove A; 422. Adaptive guide groove; 423. Movable ring B; 424. Inclined guide groove B; 425. Arc guide groove;

[0062] 431. Movable lever. Detailed Implementation

[0063] like Figures 1 to 16 As shown, the present invention relates to a TOPCon battery edge coating passivation treatment device, which includes a reaction vessel body 1, a base 2, a stacking mechanism 3, and a functional mechanism 4.

[0064] In an embodiment of the present invention, the reaction vessel body 1 has a hollow interior forming a reaction chamber. Two turntables 11 are rotatably mounted in the center of the reaction chamber, arranged vertically. The two turntables 11 are fixedly connected by a plurality of vertical plates 12 arranged in a ring with equal spacing. Two ventilation units A13 are symmetrically connected to one side of the reaction vessel body 1. The present invention uses the two ventilation units A13 for passivation air intake and exhaust, respectively, causing the gas to drive the turntables 11 and the vertical plates 12 to rotate. This rotation of the gas within the reaction chamber optimizes airflow uniformity and improves the deposition rate during battery edge passivation.

[0065] In an embodiment of the present invention, the base 2 is fixed at the bottom of the reaction chamber, and an installation groove 21 is provided in the base 2. A micro motor 22 is fixed in the installation groove 21. Two centripetal grooves 23 are opened in parallel at the top of the base 2. A movable ring A24 is movably provided in the centripetal groove 23. A rotating arc groove 25 is connected to the eccentric end of one of the centripetal grooves 23.

[0066] In an embodiment of the present invention, the stacking mechanism 3 includes a U-shaped seat 31, a plurality of partitions 32, a pitch-changing component 33 and two elastic components 34;

[0067] The U-shaped seat 31 is fixed at the top of the base 2. Both ends of the inner surface of the U-shaped seat 31 have movable cavities 311. The movable cavities 311 have several slots 312 arranged in a linear and equally spaced structure. Movable slots 313 are also provided on both sides of the movable cavities 311.

[0068] Several partitions 32 are arranged in a linear and equally spaced structure within the U-shaped seat 31. Air grooves 321 are provided at opposite ends of any two adjacent partitions 32. Sealing gaskets A322 are provided on both sides of the air grooves 321. Sealing gaskets A322 are fitted and connected to the partitions 32. The partitions 32 and the four movable grooves 313 are slidably connected through movable guide blocks 314. Sealing gaskets B323 are embedded on the partition 32 at the top. Sealing gaskets B323 are movably connected to the horizontal part of the U-shaped seat 31.

[0069] The gas groove 321, the two corresponding sealing gaskets A322, and the battery surface together form a protective gas cavity. This invention protects the battery surface by placing the battery in the gap between the two separators 32 and using the sealing gaskets A322 to isolate the passivating gas. Furthermore, by setting up the protective gas cavity formed by the gas groove 321, the two corresponding sealing gaskets A322, and the battery surface, a protective gas (such as nitrogen or an inert gas) is introduced into the protective gas cavity. This creates an air curtain isolation layer within the protective gas cavity that further protects the battery surface. The protection confines the passivating gas to the cutting area, and the air curtain isolation layer reduces the need for pressure contact between the sealing gaskets A322 and the battery, thereby reducing battery damage. This solves the technical problem of poor side passivation effect after battery cutting using ALD (Alternating Current Deposition) through battery stacking.

[0070] The variable pitch assembly 33 includes four slide rods 331, which are rotatably disposed in four movable slots 313. The bottom end of one slide rod 331 passes through the mounting slot 21 and is fixedly connected to the output end of the micro motor 22. The slide rod 331 has a number of lifting guide slots 332 arranged in a linear and equally spaced structure. The lifting distance of the lower lifting guide slot 332 is less than that of the upper lifting guide slot 332, and the difference in lifting distance between any two adjacent lifting guide slots 332 is equal. Ball blocks are movably connected to the lifting guide slots 332. Four movable guide blocks 314 located at the bottom are rotatably connected to the four slide rods 331, and the remaining movable guide blocks 314 are movably connected to the corresponding slide rods 331. The ball blocks are fixedly connected to the corresponding movable guide blocks 314.

[0071] The bottom end of the lifting guide groove 332 is connected to a limiting arc groove 3321, and the gap distance between any two adjacent limiting arc grooves 3321 is equal. Through the above-mentioned configuration, the micro motor 22 is rotated by an external control mechanism, and the corresponding slide rod 331 rotates. Except for the bottom partition 32, the other partitions 32 rise and fall simultaneously. Since the lifting distance of the lower lifting guide groove 332 is less than that of the upper lifting guide groove 332, and the difference in lifting distance between any two adjacent lifting guide grooves 332 is equal, the gap distance between any two adjacent partitions 32 varies, facilitating battery installation and removal. Furthermore, the limiting arc groove 3321 ensures that when the ball moves to the limiting arc groove 3321, the gap distance between two adjacent partitions 32 is minimized. The limiting arc groove 3321 limits the movement of the ball, reducing the load on the micro motor 22 and extending its service life.

[0072] The elastic component 34 includes a sliding plate 341 and two ventilation units B348. The two sliding plates 341 are slidably disposed within two movable cavities 311. The sliding plates 341 and the movable cavities 311 are elastically connected by several evenly arranged springs 342. An elastic pad 343 is embedded in the end of the sliding plate 341 near the air groove 321. The elastic pad 343 has several through grooves A344 at positions relative to several protective air cavities. The sliding plate 341 has several through grooves B345 for connecting two adjacent through grooves A344. An elastic block 346 is fixedly mounted on groove B345. Several elastic blocks 346 are respectively fixedly connected to several empty grooves 312. A passage cavity 347 is opened at one end of the elastic block 346 near the air groove 321. Two ventilation units B348 are respectively connected to two protective air cavities located at both ends. The ventilation units B348 are connected to the outside. Two adapting rigid plates 349 are symmetrically arranged inside the passage cavity 347. The adapting rigid plates 349 are fixedly connected to the sliding plate 341. The gap between the two adapting rigid plates 349 forms a pressure chamber. Through the structural design of the elastic component 34, this invention allows the two elastic components 34 to perform initial lateral correction of the battery when it is placed in the gap between the two elastic components 34. The elastic pad 343 provides protection for the battery during the passivation process. However, since the battery sizes cannot be exactly the same, a large elastic force is required to make the elastic pad 343 close to the battery edge, which can easily damage the edge of larger batteries. Figure 7 As shown, the present invention designs several protective air chambers, several through slots A344 and several through slots B345 to form a functional air chamber. The functional air chamber has a folded structure, and only two ventilation units B348 are needed to control the air intake and exhaust of the functional air chamber, reducing the size of the equipment. The protective gas in the functional air chamber can enter the pressure chamber to provide pressure to the elastic pad 343. The air pressure is used to balance the contact force between the elastic pad 343 and each battery, so that the elastic pad 343 is in close contact with the other edges of the battery while reducing the elastic force requirement and further improving the protection effect of the other edges of the battery.

[0073] In an embodiment of the present invention, the functional mechanism 4 includes a geared motor 41, an adjusting circular plate 42, and a functional plate 43. The geared motor 41 is fixedly mounted on the top of the reaction vessel body 1, the adjusting circular plate 42 is rotatably mounted on the top of the reaction chamber, and a connecting shaft 40 is fixedly mounted on the top of the adjusting circular plate 42. The connecting shaft 40 is rotatably connected to the reaction vessel body 1, and the top of the connecting shaft 40 extends out of the top of the reaction vessel body 1 and is fixedly connected to the output end of the geared motor 41. The bottom end of the adjusting circular plate 42 is respectively provided with two radial grooves 23. The device includes an inclined guide groove A421 and an adaptive guide groove 422. Both the inclined guide groove A421 and the adaptive guide groove 422 have movable rings B423. The eccentric end of the inclined guide groove A421 is connected to an inclined guide groove B424, and the eccentric end of the adaptive guide groove 422 is connected to an arc guide groove 425. A functional plate 43 is located in the gap between the adjusting circular plate 42 and the base 2. Movable rods 431 are rotatably mounted at both ends of the functional plate 43, and the two ends of the movable rods 431 are rotatably connected to the movable rings B423 and A24, respectively. This invention, through the structural design of the functional mechanism 4, enables the output end of the reduction motor 41, controlled by an external control mechanism, to rotate. (Refer to...) Figure 14 , Figure 15 and Figure 16 As shown, the circular plate 42 is rotated, causing the two movable rings B423 to move in the inclined guide groove B424 and the arc guide groove 425 respectively. One movable ring A24 moves on the rotating arc groove 25, while the other movable ring A24 remains stationary at the eccentric end of the centripetal groove 23. This causes the functional plate 43 to first rotate. Then, the two movable rings B423 move in the inclined guide groove A421 and the adaptive guide groove 422 respectively. The adaptive guide groove 422 is designed with an inclination relative to the inclined guide groove A421, causing the two movable rings A24 to move in the two centripetal grooves 23 respectively. This causes the functional plate 43 to move centripetally, flattening the passivation edges of several batteries to be coated, so that the passivation edges of several batteries are on the same plane, facilitating the passivation of the battery edges. The functional plate 43 is located in... Figure 14 At the initial position shown, as Figure 3 As shown, the rotating gas in the reaction chamber is shielded to increase the passivation gas concentration in the cutting area, thereby further improving the deposition rate during the passivation of the battery edge coating.

[0074] A process for edge coating passivation treatment of TOPCon batteries, applicable to the aforementioned battery edge coating passivation treatment apparatus, includes the following steps:

[0075] S1: Battery placement;

[0076] Batteries are placed in the gap between any two adjacent partitions 32;

[0077] S2: Use of functional mechanism 4;

[0078] S2.1: The output of the geared motor 41 of the external control mechanism is rotated, so that the functional board 43 first rotates and then moves in a centripetal motion to flatten the passivation edges of several batteries to be coated, so that the passivation edges of several batteries to be coated are in the same plane, which facilitates the passivation of the edges of several batteries to be coated.

[0079] S2.2: Cause the output of the reduction motor 41 to rotate in the opposite direction through the external control mechanism, so that the function board 43 is in the initial position;

[0080] S3: Battery mounting;

[0081] The micro motor 22 is rotated by an external control mechanism, and the ball moves to the limiting arc groove 3321. The gap between the two adjacent partitions 32 is minimized, so that the air groove 321, the two corresponding sealing gaskets A322 and the battery surface together form a protective air cavity. Protective gas is introduced into the protective air cavity, so that the air curtain isolation layer in the protective air cavity further protects the battery surface. The protection confines the passivating gas to the cutting area. The air curtain isolation layer reduces the squeezing contact requirement between the sealing gasket A322 and the battery, thereby reducing battery damage.

[0082] S4: Battery edge coating passivation treatment;

[0083] The passivation gas is introduced and discharged through two ventilation units A13, which causes the gas to drive the turntable 11 and several vertical plates 12 to rotate, thereby rotating the gas in the reaction chamber, optimizing the airflow uniformity. The functional plate 43 blocks the rotating gas in the reaction chamber to increase the passivation gas concentration in the cutting area, thereby increasing the deposition rate during the passivation of the battery edge coating.

[0084] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A TOPCon battery edge coating passivation treatment device, characterized in that, The reaction vessel includes a reaction vessel body, the interior of which is hollow to form a reaction chamber. A base is fixed to the bottom of the reaction chamber, and a stacking mechanism is fixed to the top of the base. The reaction vessel body is provided with functional mechanisms. The stacking mechanism includes a U-shaped base, several partitions, a pitch-changing component, and two elastic components. The U-shaped base is fixed to the top of the base. The U-shaped base has several partitions arranged in a linear and equally spaced structure. The U-shaped base is provided with a pitch-changing component for adjusting the gap between any two adjacent partitions. Both ends of the inner surface of the U-shaped base are provided with elastic components. The U-shaped seat has movable cavities at both ends of its inner surface. Each movable cavity has several slots arranged in a linear, equidistant structure. Movable slots are also provided on both sides of the movable cavity. Air grooves are provided at the opposite ends of any two adjacent partitions. Sealing gaskets A are provided on both sides of the air grooves. Sealing gaskets A are fitted and connected to the partitions. The partitions and the four movable grooves are slidably connected through movable guide blocks. Sealing gaskets B are embedded in the partition at the top. Sealing gaskets B are movably connected to the horizontal part of the U-shaped seat. The battery is placed in the gap between the two partitions, and the air groove, the corresponding two sealing gaskets A and the battery surface together form a protective air cavity; The elastic component includes a sliding plate and two ventilation units B. The two sliding plates are slidably disposed in the two movable cavities. The sliding plates and the movable cavities are elastically connected by a plurality of evenly arranged springs. An elastic pad is embedded in one end of the sliding plate near the air groove. The elastic pad has a plurality of through grooves A at the positions of the plurality of protective air cavities. The sliding plate has a plurality of through grooves B for connecting two adjacent through grooves A. An elastic block is fixed on the through groove B. The plurality of elastic blocks are fixedly connected to the plurality of empty grooves. The elastic block has a through cavity at one end near the air groove. A plurality of the aforementioned protective air chambers, a plurality of through slots A and a plurality of the aforementioned through slots B are connected to form a functional air chamber, and the functional air chamber has a folded structure; The two ventilation units B are respectively connected to the two protective air chambers located at both ends, and the ventilation units B are connected to the outside.

2. The TOPCon battery edge coating passivation treatment apparatus according to claim 1, characterized in that, Two turntables are rotatably arranged in the middle of the reaction chamber. The two turntables are arranged in an upper and lower structure and are fixedly connected by several vertical plates arranged in a ring with equal spacing. Two ventilation units A are symmetrically connected on one side of the reaction tank body.

3. The TOPCon battery edge coating passivation treatment apparatus according to claim 2, characterized in that, The base is fixed to the bottom of the reaction chamber. An installation groove is provided inside the base. A micro motor is fixed inside the installation groove. Two centripetal grooves are opened in parallel at the top of the base. A movable ring A is movably provided inside the centripetal groove. A rotating arc groove is connected to the eccentric end of one of the centripetal grooves.

4. The TOPCon battery edge coating passivation treatment apparatus according to claim 3, characterized in that, The variable pitch assembly includes four slide rods, which are rotatably disposed in four movable slots. The bottom end of one slide rod passes through the mounting slot and is fixedly connected to the output end of the micro motor. The slide rod has several lifting guide slots with a linear and equidistant structure. Ball blocks are movably connected to the lifting guide slots. The four movable guide blocks located at the bottom end are rotatably connected to the four slide rods, and the remaining movable guide blocks are movably connected to the corresponding slide rods. Several ball blocks are fixedly connected to the corresponding several movable guide blocks. The lifting distance of the lower lifting guide groove is less than that of the upper lifting guide groove, and the difference in lifting distance between any two adjacent lifting guide grooves is equal.

5. The TOPCon battery edge coating passivation treatment apparatus according to claim 4, characterized in that, The bottom end of the lifting guide groove is connected to a limiting arc groove, and the gap distance between any two adjacent limiting arc grooves is equal.

6. The TOPCon battery edge coating passivation treatment apparatus according to claim 5, characterized in that, The cavity is provided with two symmetrically arranged rigid plates, which are fixedly connected to the slide plate. The gap between the two rigid plates forms a pressure chamber.

7. The TOPCon battery edge coating passivation treatment apparatus according to claim 6, characterized in that, The functional mechanism includes a geared motor, an adjusting disc, and a functional plate; The geared motor is fixed to the top of the reaction vessel body. The adjusting circular plate is rotatably mounted on the top of the reaction chamber. A connecting shaft is fixed to the top of the adjusting circular plate and rotatably connected to the reaction vessel body. The top of the connecting shaft extends out of the top of the reaction vessel body and is fixedly connected to the output end of the geared motor. An inclined guide groove A and an adaptive guide groove are respectively opened at the bottom end of the adjusting circular plate opposite to the two centripetal grooves. A movable ring B is movably mounted in both the inclined guide groove A and the adaptive guide groove. The eccentric end of the inclined guide groove A is connected to the inclined guide groove B, and the eccentric end of the adaptive guide groove is connected to the arc guide groove. The functional plate is located in the gap between the adjusting circular plate and the base. Movable rods are rotatably mounted at both ends of the functional plate. The two ends of the movable rods are rotatably connected to the movable ring B and the movable ring A, respectively.

8. A process for edge coating passivation treatment of a TOPCon battery, applicable to the edge coating passivation treatment apparatus for a TOPCon battery as described in claim 7, characterized in that, Includes the following steps: S1: Battery placement; Batteries are placed in the gap between any two adjacent partitions; S2: Use of functional mechanisms; S2.1: The output end of the geared motor of the external control mechanism rotates, so that the function board first rotates and then moves centripetally to flatten the passivation edges of several batteries to be coated, so that the passivation edges of several batteries to be coated are in the same plane, which facilitates the passivation of the edges of several batteries to be coated. S2.2: Causes the output of the speed reduction motor to rotate in the opposite direction through the external control mechanism, so that the function board is in the initial position; S3: Battery mounting; The micro motor output is rotated by an external control mechanism, and the ball moves to the limit arc groove. The distance between two adjacent partitions is minimized, so that the air groove, the two corresponding sealing gaskets A, and the battery surface together form a protective air chamber. Protective gas is introduced into the protective air chamber, so that the air curtain isolation layer in the protective air chamber further protects the battery surface. The protection confines the passivating gas to the cutting area. The air curtain isolation layer reduces the pressure contact between the sealing gasket A and the battery, thereby reducing battery damage. S4: Battery edge coating passivation treatment; The passivation gas is introduced and discharged through two ventilation units A, which causes the gas to drive the turntable and several vertical plates to rotate. This rotation of the gas in the reaction chamber optimizes the uniformity of airflow. The functional plate also blocks the rotating gas in the reaction chamber to increase the concentration of passivation gas in the cutting area, thereby increasing the deposition rate during the passivation of the battery edge coating.

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