T0PCon battery edge coating and passivating treatment device and T0PCon battery edge coating and passivating treatment process

Abstract

The invention discloses a T0PCon solar cell edge coating passivation treatment device and process, relates to the technical field of solar cell manufacturing, aims to solve the technical problem of poor side passivation effect after solar cells are cut by adopting ALD in a solar cell stacking mode, and comprises a reaction tank body, a base, a stacking mechanism and a functional mechanism. The solar cell is placed in the gap between the two partition plates, passivation gas is isolated through the sealing gaskets A, so that the surface of the solar cell is protected, the protection gas cavity is defined by the gas grooves, the two corresponding sealing gaskets A and the surface of the solar cell, and protection gas is introduced into the protection gas cavity, so that the surface of the solar cell is protected. The surface of the solar cell is further protected by the air curtain isolation layer in the protection air cavity, passivation gas is limited in the cutting area through protection, the extrusion contact requirement of the sealing gasket A and the solar cell is reduced through the air curtain isolation layer, and therefore damage to the solar cell is reduced.

Description

Technical Field

[0001] The present invention relates to the field of solar cell manufacturing technology, and more specifically, to a TOPCon cell edge coating passivation treatment device and process. Background Art

[0002] During the cutting and separation process, TOPCon batteries still suffer from battery performance loss due to the generation of new unpassivated sides. After the battery is sliced, a certain number of battery stacks are passivated through passivation technology such as ALD to achieve side passivation after battery cutting, repair the cutting loss, and improve the overall performance of the TOPCon battery.

[0003] After the T0PCon battery is stacked, there is a gap between two adjacent batteries, which makes it easy for the cross-section coating to be plated onto the grid wire pads on the battery surface, so as not to affect the welding tension. In addition, the cross-section coating is prone to winding, which affects the appearance of the battery, resulting in poor passivation treatment effect of the battery edge coating. In view of this, we propose a T0PCon battery edge coating passivation treatment device and process. Summary of the Invention

[0004] The purpose of the present 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 solutions: a TOPCon battery edge coating passivation treatment device, comprising a reaction tank body, the interior of the reaction tank body being hollow to form a reaction chamber, a base being fixed at the bottom of the reaction chamber, a stacking mechanism being fixed at the top of the base, and a functional mechanism being provided on the reaction tank body;

[0006] The stacking mechanism includes a U-shaped seat, a plurality of partitions, a variable pitch component and two elastic components. The U-shaped seat is fixed to the top of the base. A plurality of partitions are arranged in a linear and equidistant structure inside the U-shaped seat. The U-shaped seat is provided with a variable pitch component for adjusting the distance between any two adjacent partitions. Elastic components are provided at both ends of the inner surface of the U-shaped seat.

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

[0008] The air groove, the corresponding two sealing gaskets A, and the battery surface collectively form a protective air cavity. The present invention protects the battery surface by placing the battery in the gap between two separators and isolating the passivation gas with the sealing gasket A. Furthermore, the air groove, the corresponding two sealing gaskets A, and the battery surface collectively form a protective air cavity, into which a protective gas, which can be an inert gas such as nitrogen, is introduced. An air curtain isolation layer within the protective air cavity further protects the battery surface, confining the passivation gas to the cutting area. The air curtain isolation layer reduces the need for extrusion contact between the sealing gasket A and the battery, thereby reducing battery damage. This solves the technical problem of poor side passivation after battery cutting using ALD by stacking batteries.

[0009] Preferably, two turntables are rotatably provided in the middle of the reaction chamber, and the two turntables are arranged in an upper and lower structure. The two turntables are fixedly connected by a number of vertical plates arranged in a circular equidistant structure. One side of the reaction tank body is symmetrically structured and connected with two ventilation units A.

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

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

[0012] Preferably, the pitch-changing assembly includes four sliding rods, and the four sliding rods are rotatably arranged in the four movable grooves respectively. The bottom end of one of the sliding rods penetrates the mounting groove and is fixedly connected to the output end of the micro-motor. The sliding rod is provided with a plurality of lifting guide grooves in a linear and equidistant structure. The lifting guide grooves are movably connected with ball blocks. The four movable guide blocks at the bottom are respectively rotatably connected to the four sliding rods, and the remaining movable guide blocks are respectively movably connected to the corresponding sliding rods. Several ball blocks are respectively fixedly connected to the corresponding several movable guide blocks.

[0013] The lifting distance of the lifting guide slot located at the bottom is smaller than the lifting distance of the lifting guide slot located at the top, and the difference in the lifting distances of any two adjacent lifting guide slots is equal.

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

[0015] Preferably, the elastic component includes a slide plate and two ventilation units B, the two slide plates are respectively slidably arranged in the two active cavities, the slide plates and the active cavities are elastically connected by a number of evenly arranged springs, an elastic pad is embedded in one end of the slide plate close to the air groove, the elastic pad is provided with a number of through grooves A relative to the position of the protective air cavities, the slide plate is provided with a number of through grooves B for connecting two adjacent through grooves A, an elastic block is fixed on the through groove B, the several elastic blocks are respectively fixedly connected to the several empty slots, and the elastic block is provided with a through cavity close to one end of the air groove;

[0016] A plurality of the protective air cavities, a plurality of the through slots A and a plurality of the through slots B are connected to form a functional air cavity, and the functional air cavity is a folded structure;

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

[0018] Preferably, two adapting hard plates are symmetrically arranged in the through cavity, the adapting hard plates are fixedly connected to the slide plate, and the gap between the two adapting hard plates forms a pressure cavity.

[0019] Preferably, the functional mechanism includes a reduction motor, an adjusting circular plate, and a functional plate; the reduction motor is fixedly mounted on the top of the reaction tank 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 tank body, the top of the connecting shaft passes through the top of the reaction tank body and is fixedly connected to the output end of the reduction motor, an inclined guide groove A and an adaptable guide groove are respectively provided at the bottom end of the adjusting circular plate relative to the two centripetal grooves, and movable rings B are movably provided in the inclined guide groove A and the adaptable guide groove, the eccentric end of the inclined guide groove A is connected to an inclined guide groove B, and the eccentric end of the adaptable guide groove is connected to an arc guide groove, the functional plate is arranged in the gap between the adjusting circular plate and the base, movable rods are rotatably provided at both ends of the functional plate, and the two ends of the movable rods are rotatably connected to the movable ring B and the movable ring A respectively.

[0020] A TOPCon battery edge coating passivation treatment process, which is applicable to the above-mentioned battery edge coating passivation treatment device, comprises 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 reduction motor is rotated by an external control mechanism, so that the functional board first performs a rotational motion and then a centripetal motion, thereby flattening the passivation edges of the batteries to be coated, so that the passivation edges of the batteries to be coated are located in the same plane, thereby facilitating the passivation coating of the edges of the batteries to be coated;

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

[0026] S3: Battery fixation;

[0027] The micro-motor output end is controlled to rotate by an external control mechanism, and the ball block moves to the limiting arc groove. The gap between the two adjacent partitions is minimized, so that the air groove, the corresponding two sealing pads A and the battery surface together form a protective air cavity. The 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, limiting the passivation gas to the cutting area. The air curtain isolation layer reduces the need for extrusion contact between the sealing pad A and the battery, thereby reducing battery damage.

[0028] S4: Battery edge coating passivation treatment;

[0029] The passivation air inlet and outlet are respectively carried out through two ventilation units A, so that the gas drives the turntable and several vertical plates to rotate, thereby rotating the gas in the reaction chamber and optimizing the uniformity of the airflow. The functional plate 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 cell edge coating.

[0030] The beneficial effects of the present invention are:

[0031] 1. The present invention places the solar cell in the gap between two partitions and uses a sealing gasket A to isolate the passivation gas, thereby protecting the surface of the solar cell. An air groove, two corresponding sealing gaskets A and the surface of the solar cell are provided to form a protective air cavity. A protective gas is introduced into the protective air cavity. The protective gas can be an inert gas such as nitrogen, so that an air curtain isolation layer in the protective air cavity further protects the surface of the solar cell. The protection limits the passivation gas to the cutting area, and the air curtain isolation layer is used to reduce the need for extrusion contact between the sealing gasket A and the solar cell, thereby reducing damage to the solar cell. This solves the technical problem of poor side passivation effect after cutting of solar cells by using ALD through solar cell stacking.

[0032] 2. The present invention adopts the structural design of the elastic components so that when the battery is placed in the gap between the two elastic components, the two elastic components perform preliminary lateral correction on the battery, and the elastic pad provides protection for the battery during the passivation process. However, since the size of the batteries cannot be exactly the same, a large elastic force is required to make the elastic pad close to the edge of the battery, which can easily damage the edge of the larger battery. The present invention also designs a plurality of protective air cavities, a plurality of through grooves A and a plurality of through grooves B to be connected to form a functional air cavity, and the functional air cavity has a folding structure. Only two ventilation units B are required to control the air intake and outlet of the functional air cavity, thereby reducing the volume of the equipment. The protective gas in the functional air cavity can enter the pressure chamber to provide pressure on the elastic pad, and the air pressure is used to balance the contact force between the elastic pad and each battery, so that the elastic pad is tightly attached to the remaining edges of the battery while reducing the elastic force requirement, further improving the protection effect of the remaining edges of the battery.

[0033] 3. The present invention, through the structural design of the functional mechanism, makes it possible to rotate the output end of the reduction motor through the external control mechanism, adjust the rotation of the circular plate, and make the two movable rings B move in the inclined guide groove B and the arc guide groove respectively, so that one of the movable rings A moves on the rotating arc groove, and the other movable ring A remains stationary at the eccentric end of the centripetal groove, so that the functional plate first rotates, 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, so that the two movable rings A move in the two centripetal grooves respectively, so that the functional plate moves centripetally, flattens the passivation edges of several batteries to be coated, and makes the positions of the passivation edges of several batteries to be coated on the same plane, which is convenient for the passivation of the edges of several batteries to be coated. When the functional plate is in the initial position, the rotating gas in the reaction chamber is shielded to increase the concentration of the passivation gas in the cutting area, thereby further increasing the deposition rate during the passivation of the battery edge coating. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0035] Figure 2 The overall structure of the present invention is schematically shown in cross section. Figure 1 ;

[0036] Figure 3 The overall structure of the present invention is schematically shown in cross section. Figure 2 ;

[0037] Figure 4 It is a structural schematic diagram of the turntable and the vertical plate of the present invention;

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

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

[0040] Figure 7 for Figure 6 A schematic diagram of the enlarged structure of part A;

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

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

[0043] Figure 10 for Figure 9 A magnified schematic diagram of the structure of part B;

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

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

[0046] Figure 13 It is a schematic diagram of the partial structure of the base and the energy mechanism of the present invention;

[0047] Figure 14 This is a schematic diagram of the motion state of the functional board of the present invention. Figure 1 ;

[0048] Figure 15 This is a schematic diagram of the motion state of the functional board of the present invention. Figure 1 ;

[0049] Figure 16 This is a schematic diagram of the motion state of the functional board of the present invention. Figure 1 .

[0050] Description of the numbers in the figure:

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

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

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

[0054] 31. U-shaped seat; 32. Partition; 33. Pitch-changing assembly; 34. Elastic assembly;

[0055] 311, movable cavity; 312, empty slot; 313, movable slot; 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, arc limit slot;

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

[0060] 40. Coupling shaft; 41. Reducer motor; 42. Adjustment plate; 43. Functional plate;

[0061] 421, oblique guide groove A; 422, adaptive guide groove; 423, movable ring B; 424, oblique guide groove B; 425, arc guide groove;

[0062] 431. Movable rod. DETAILED DESCRIPTION

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

[0064] In an embodiment of the present invention, the interior of the reactor body 1 is hollow, forming a reaction chamber. Two rotating discs 11 are rotatably mounted in the middle of the reaction chamber. The two rotating discs 11 are arranged in an up-and-down configuration and are fixedly connected by a plurality of vertical plates 12 arranged in an annular, evenly spaced configuration. Two ventilation units A13 are symmetrically connected and mounted on one side of the reactor body 1. The present invention utilizes two ventilation units A13 to separately control the inlet and outlet of passivation gases, allowing the gas to drive the rotation of the rotating disc 11 and the plurality of vertical plates 12, thereby rotating the gas within the reaction chamber, optimizing the uniformity of the airflow and increasing the deposition rate during passivation of the cell edge coating.

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

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

[0067] The U-shaped seat 31 is fixed to the top of the base 2. The inner surface of the U-shaped seat 31 is provided with movable cavities 311 at both ends. The movable cavity 311 is provided with a plurality of slots 312 in a linear and evenly spaced structure. The movable cavity 311 is provided with movable slots 313 on both sides.

[0068] Several partitions 32 are arranged in a linear and equidistant configuration within the U-shaped seat 31. Air grooves 321 are defined at the opposing ends of any two adjacent partitions 32. Sealing gaskets A322 are provided on both sides of the air grooves 321. Sealing gaskets A322 engage with the partitions 32. The partitions 32 are slidably connected to the four movable grooves 313 via movable guide blocks 314. A sealing gasket B323 is embedded in the top partition 32 and movably connected to the transverse portion of the U-shaped seat 31.

[0069] The air groove 321, the corresponding two sealing gaskets A322, and the battery surface together form a protective air cavity. The present invention protects the battery surface by placing the battery in the gap between the two separators 32 and isolating the passivation gas with the sealing gasket A322. Furthermore, the air groove 321, the corresponding two sealing gaskets A322, and the battery surface together form a protective air cavity. A protective gas, such as nitrogen, is introduced into the protective air cavity. The protective gas is an inert gas, such as nitrogen. The air curtain isolation layer within the protective air cavity further protects the battery surface, confining the passivation gas to the cutting area. The air curtain isolation layer reduces the need for extrusion contact between the sealing gasket A322 and the battery, thereby reducing battery damage. This solves the technical problem of poor side passivation after battery cutting using ALD by stacking batteries.

[0070] The pitch variable assembly 33 includes four sliding rods 331, and the four sliding rods 331 are rotatably arranged in four movable grooves 313 respectively. The bottom end of one of the sliding rods 331 penetrates the mounting groove 21 and is fixedly connected to the output end of the micro motor 22. The sliding rod 331 is provided with a plurality of lifting guide grooves 332 in a linear and equidistant structure. The lifting distance of the lifting guide groove 332 located at the bottom is smaller than the lifting distance of the lifting guide groove 332 located at the top, and the difference in the lifting distance of any two adjacent lifting guide grooves 332 is equal. A ball block is movably connected to the lifting guide groove 332. The four movable guide blocks 314 at the bottom are respectively rotatably connected to the four sliding rods 331, and the remaining movable guide blocks 314 are respectively movably connected to the corresponding sliding rods 331, and a plurality of ball blocks are respectively fixedly connected to the corresponding plurality of 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 arrangement, the present invention allows the output end of the micro motor 22 to rotate by controlling the external control mechanism, and the corresponding slide bar 331 rotates. Except for the partition 32 at the bottom, the remaining partitions 32 are raised and lowered simultaneously. Because the lifting distance of the lifting guide groove 332 located below is smaller than that of the lifting guide groove 332 located above, and the difference in the lifting distance between any two adjacent lifting guide grooves 332 is equal, the gap distance between any two adjacent partitions 32 can be changed, which facilitates the loading and unloading of batteries. In addition, the setting of the limiting arc groove 3321 ensures that when the ball block moves to the limiting arc groove 3321, the gap distance between the two adjacent partitions 32 is minimized. The limiting arc groove 3321 has a limiting effect on the ball block, reducing the load on the micro motor 22 and improving its service life.

[0072] The elastic component 34 includes a slide plate 341 and two ventilation units B348. The two slide plates 341 are respectively slidably arranged in the two active cavities 311. The slide plates 341 and the active cavities 311 are elastically connected by a number of evenly arranged springs 342. An elastic pad 343 is embedded at one end of the slide plate 341 near the air groove 321. The elastic pad 343 has a number of through grooves A344 relative to the positions of the protective air cavities. The slide plate 341 is provided with a number of through grooves B345 for connecting two adjacent through grooves A344. An elastic block 346 is fixed on the groove B345. Several elastic blocks 346 are fixedly connected to several empty grooves 312 respectively. A through cavity 347 is provided on the elastic block 346 near one end of the air groove 321. Two ventilation units B348 are respectively connected to the two protective air cavities at both ends. The ventilation unit B348 is connected to the outside. Two adapting hard plates 349 are symmetrically arranged in the through cavity 347. The adapting hard plates 349 are fixedly connected to the slide plate 341. The gap between the two adapting hard plates 349 forms a pressure chamber. The present invention uses the structural design of the elastic component 34 so that when the battery is placed in the gap between the two elastic components 34, the two elastic components 34 perform preliminary lateral correction on the battery, and the elastic pad 343 provides protection for the battery during the passivation process. However, since the size of the batteries cannot be exactly the same, a large elastic force is required to make the elastic pad 343 close to the edge of the battery, which can easily damage the edge of a larger battery, such as Figure 7 As shown, the present invention is designed to connect several protective air cavities, several through grooves A344 and several through grooves B345 to form a functional air cavity, and the functional air cavity is a folding structure. Only two ventilation units B348 are needed to control the air inlet and outlet of the functional air cavity, thereby reducing the volume of the equipment. The protective gas in the functional air cavity can enter the pressure chamber to provide pressure to the elastic pad 343, and 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 tightly attached to the other edges of the battery while reducing the elastic force requirement, thereby further improving the protection effect of the other edges of the battery.

[0073] In the embodiment of the present invention, the functional mechanism 4 includes a reduction motor 41, an adjustment circular plate 42, and a functional plate 43; the reduction motor 41 is fixedly arranged at the top of the reaction tank body 1, the adjustment circular plate 42 is rotatably arranged at the top of the reaction chamber, the top of the adjustment circular plate 42 is fixedly provided with a connecting shaft 40, the connecting shaft 40 is rotatably connected to the reaction tank body 1, the top of the connecting shaft 40 passes through the top of the reaction tank body 1 and is fixedly connected to the output end of the reduction motor 41, and the bottom end of the adjustment circular plate 42 is respectively opened relative to the two centripetal grooves 23. There are inclined guide grooves A421 and adaptive guide grooves 422, and movable rings B423 are movably provided in the inclined guide grooves A421 and the adaptive guide grooves 422. 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. The function plate 43 is set in the gap between the adjustment circular plate 42 and the base 2. Both ends of the function plate 43 are rotatably provided with movable rods 431. The two ends of the movable rod 431 are rotatably connected to the movable rings B423 and the movable rings A24 respectively. The present invention makes the output end of the reduction motor 41 rotate by the external control mechanism, referring to Figure 14 、 Figure 15 and Figure 16 As shown, the circular plate 42 is adjusted to rotate so that the two movable rings B423 are respectively movable in the oblique guide groove B424 and the arc guide groove 425, so that one of the movable rings A24 is movable on the rotating arc groove 25, and the other movable ring A24 remains stationary at the eccentric end position of the centripetal groove 23, so that the functional plate 43 first rotates, and then the two movable rings B423 are respectively movable in the oblique guide groove A421 and the adaptable guide groove 422, and the adaptable guide groove 422 is designed with an inclination relative to the oblique guide groove A421, so that the two movable rings A24 are respectively movable in the two centripetal grooves 23, so that the functional plate 43 moves centripetally, and the passivation edges of several batteries to be coated are flattened, so that the positions of the passivation edges of several batteries to be coated are in the same plane, which is convenient for the passivation of the edges of several batteries to be coated, wherein the functional plate 43 is in Figure 14 When the initial position is shown, Figure 3 As shown, the rotating gas in the reaction chamber is shielded to increase the concentration of the passivation gas in the cutting area, thereby further improving the deposition rate during the passivation of the cell edge coating.

[0074] A TOPCon battery edge coating passivation treatment process, which is applicable to the above-mentioned battery edge coating passivation treatment device, comprises 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 end of the reduction motor 41 is rotated by the external control mechanism, so that the function plate 43 first rotates and then moves centripetally, thereby flattening the edges of the batteries to be coated and passivated, so that the edges of the batteries to be coated and passivated are located in the same plane, which facilitates the coating and passivation of the edges of the batteries to be coated;

[0079] S2.2: The output end of the reduction motor 41 rotates in the reverse direction through the external control mechanism, so that the function board 43 is in the initial position;

[0080] S3: Battery fixation;

[0081] The output end of the micro motor 22 is controlled to rotate by an external control mechanism, and the ball block moves to the limiting arc groove 3321. The gap between two adjacent partitions 32 is minimized, so that the air groove 321, the corresponding two sealing pads 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, limiting the passivation gas to the cutting area. The air curtain isolation layer is used to reduce the need for extrusion contact between the sealing pad A322 and the battery, thereby reducing battery damage.

[0082] S4: Battery edge coating passivation treatment;

[0083] The passivation air inlet and outlet are respectively performed through two ventilation units A13, so that the gas drives the turntable 11 and several vertical plates 12 to rotate, thereby rotating the gas in the reaction chamber and optimizing the uniformity of the airflow. 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 the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A TOPCon battery edge coating passivation treatment device, characterized in that: It includes a reaction tank body, wherein the interior of the reaction tank body is hollow to form a reaction chamber, a base is fixedly provided at the bottom of the reaction chamber, a stacking mechanism is fixedly provided at the top of the base, and a functional mechanism is provided on the reaction tank body; The stacking mechanism includes a U-shaped seat, a plurality of partitions, a variable pitch component and two elastic components. The U-shaped seat is fixed to the top of the base. A plurality of partitions are arranged in a linear and equidistant structure inside the U-shaped seat. The U-shaped seat is provided with a variable pitch component for adjusting the distance between any two adjacent partitions. Elastic components are provided at both ends of the inner surface of the U-shaped seat. Air grooves are formed at the opposite ends of any two adjacent partitions, and sealing gaskets A are provided on both sides of the air grooves. The sealing gaskets A are engaged with the partitions, and the partitions are slidably connected to the four movable grooves through movable guide blocks. A sealing gasket B is embedded in the partition at the top, and the sealing gasket B is movably connected to the horizontal portion of the U-shaped seat. The air groove, the corresponding two sealing pads A and the battery surface together form a protective air cavity.

2. The TOPCon battery edge coating passivation treatment device according to claim 1, wherein: Two turntables are rotatably provided in the middle of the reaction chamber. The two turntables are arranged in an upper and lower structure. The two turntables are fixedly connected by a number of vertical plates arranged in a ring-shaped equidistant structure. One side of the reaction tank body is symmetrically structured and connected with two ventilation units A.

3. The TOPCon battery edge coating passivation treatment device according to claim 2, wherein: The base is fixed at the bottom end of the reaction chamber, and a mounting groove is provided in the base. A micro motor is fixed in the mounting groove. Two centripetal grooves are provided in parallel at the top end of the base. A movable ring A is movably provided in the centripetal groove. One of the centripetal grooves has an eccentric end connected to a rotating arc groove.

4. The TOPCon battery edge coating passivation treatment device according to claim 3, wherein: Both ends of the inner surface of the U-shaped seat are provided with movable cavities, a plurality of empty slots are provided in the movable cavity in a linear and equidistant structure, and movable slots are provided on both sides of the movable cavity.

5. The TOPCon battery edge coating passivation treatment device according to claim 4, wherein: The pitch-changing assembly includes four sliding rods, which are rotatably arranged in the four movable grooves respectively. The bottom end of one of the sliding rods penetrates the mounting groove and is fixedly connected to the output end of the micro-motor. The sliding rod is provided with a plurality of lifting guide grooves in a linear and equidistant structure. Ball blocks are movably connected to the lifting guide grooves. The four movable guide blocks at the bottom are respectively rotatably connected to the four sliding rods, and the remaining movable guide blocks are respectively movably connected to the corresponding sliding rods. Several ball blocks are respectively fixedly connected to the corresponding several movable guide blocks. The lifting distance of the lifting guide slot located at the bottom is smaller than the lifting distance of the lifting guide slot located at the top, and the difference in the lifting distances of any two adjacent lifting guide slots is equal.

6. The TOPCon battery edge coating passivation treatment device according to claim 5, wherein: 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.

7. The TOPCon battery edge coating passivation treatment device according to claim 6, wherein: The elastic component includes a slide and two ventilation units B, the two slides are respectively slidably arranged in the two active cavities, the slides and the active cavities are elastically connected by a number of evenly arranged springs, an elastic pad is embedded in one end of the slide near the air groove, the elastic pad is provided with a number of through grooves A relative to the position of the protective air cavities, the slide is provided with a number of through grooves B for connecting two adjacent through grooves A, the through grooves B are fixed with elastic blocks, the several elastic blocks are respectively fixedly connected to the several empty slots, and the elastic block is provided with a through cavity near one end of the air groove; A plurality of the protective air cavities, a plurality of the through slots A and a plurality of the through slots B are connected to form a functional air cavity, and the functional air cavity is a folded structure; The two ventilation units B are respectively connected to the two protective air cavities at both ends, and the ventilation units B are connected to the outside.

8. The TOPCon battery edge coating passivation treatment device according to claim 7, wherein: Two adapting hard plates are symmetrically arranged in the through cavity. The adapting hard plates are fixedly connected to the slide plate, and the gap between the two adapting hard plates forms a pressure cavity.

9. The TOPCon battery edge coating passivation treatment device according to claim 8, wherein: The functional mechanism includes a reduction motor, an adjustment circular plate, and a functional plate; The reduction motor is fixed on the top of the reaction tank body, and the adjusting circular plate is rotatably arranged on the top of the reaction chamber. A connecting shaft is fixed on the top of the adjusting circular plate, and the connecting shaft is rotatably connected to the reaction tank body. The top of the connecting shaft passes through the top of the reaction tank body and is fixedly connected to the output end of the reduction motor. An inclined guide groove A and an adaptive guide groove are respectively provided at the bottom end of the adjusting circular plate relative to the two centripetal grooves. A movable ring B is movably provided in the inclined guide groove A and the adaptive guide groove. The eccentric end of the inclined guide groove A is connected to an inclined guide groove B, and the eccentric end of the adaptive guide groove is connected to an arc guide groove. The function plate is arranged in the gap between the adjusting circular plate and the base. Both ends of the function plate are rotatably provided with movable rods, and the two ends of the movable rod are rotatably connected to the movable ring B and the movable ring A respectively.

10. A process for passivation treatment of TOPCon battery edge coating, which is applicable to a TOPCon battery edge coating passivation treatment device according to claim 9, characterized in that: The following steps are involved: 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 reduction motor is rotated by an external control mechanism, so that the functional board first performs a rotational motion and then a centripetal motion, thereby flattening the passivation edges of the batteries to be coated, so that the passivation edges of the batteries to be coated are located in the same plane, thereby facilitating the passivation coating of the edges of the batteries to be coated; S2.2: The output end of the reduction motor is caused to rotate in the reverse direction through the external control mechanism, so that the function board is in the initial position; S3: Battery fixation; The micro-motor output end is controlled to rotate by an external control mechanism, and the ball block moves to the limiting arc groove. The gap between the two adjacent partitions is minimized, so that the air groove, the corresponding two sealing pads A and the battery surface together form a protective air cavity. The 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, limiting the passivation gas to the cutting area. The air curtain isolation layer is used to reduce the need for extrusion contact between the sealing pad A and the battery, thereby reducing battery damage. S4: Battery edge coating passivation treatment; The passivation air inlet and outlet are respectively carried out through two ventilation units A, so that the gas drives the turntable and several vertical plates to rotate, thereby rotating the gas in the reaction chamber and optimizing the uniformity of the airflow. The functional plate 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 cell edge coating.

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