CN118136738B - Solar cell passivation film plating device and equipment - Google Patents

Abstract

The invention provides a solar cell passivation film plating device and equipment, which relate to the technical field of solar cell passivation film plating and are used for passivating the cut surfaces of stacked cells, and comprise a shell and a rotating system rotating in the shell, wherein the rotating system comprises a rotating platform; the battery piece is detachably fixed on the rotating platform, and the rotating platform drives the battery piece to rotate. The invention has the following advantages: the rotary platform rotates with the stacked battery pieces, and under the action of centrifugal force, passivation raw materials entering into gaps between two adjacent battery pieces can be thrown out of the gaps, so that accumulation of the passivation raw materials between the gaps of the adjacent battery pieces is effectively avoided.

Description

Solar cell passivation coating device and equipment

Technical Field

The invention relates to the technical field of solar cell passivation coating, and in particular to a solar cell passivation coating device and equipment.

Background technique

In recent years, with the rise of new module technologies such as half-cut modules and shingled modules, it is necessary to split a battery into two or more pieces when making modules. In industrial applications, the methods of splitting solar cells generally include laser scribing plus mechanical splitting, thermal laser low-damage splitting, etc. The surface recombination rate of the split section of the battery is very high, which will have a great impact on the electrical performance of the solar cell. For example, after the Topcon solar cell is split into two by laser scribing, the conversion efficiency of the half-cell will be reduced by 0.2-0.3% due to the increase in edge recombination. The open circuit voltage of the heterojunction solar cell is higher, and the efficiency is reduced more after laser splitting. The reduction in solar cell efficiency caused by laser splitting will directly lead to a reduction in module power.

Passivation coating refers to forming a passivation film on the surface of the cell by deposition, which reduces minority carrier recombination, provides field passivation effect, and reduces reflectivity. As the quality of N-type silicon wafers and cell efficiency increases, the loss of cutting is also increasing, and the passivation coating of the cell surface after slicing becomes more important.

The existing solar cells have the following problems when passivating and coating: In order to improve production efficiency, the cells need to be stacked and then cross-sectioned for passivation coating. However, the height of the metal grid lines on the front and back of the printed cells is usually 10-30μm. The presence of these metal grid lines causes gaps between the stacked cells. At this time, if the existing coating technology is used, the passivation repair film will extend into the gaps between the cells, resulting in the phenomenon of wrap-around plating.

Summary of the invention

The purpose of the present invention is to provide a solar cell passivation coating device and equipment which can clean out the passivation film remaining in the gap.

A solar cell passivation coating device of the present invention is used for passivating the cross-section of stacked cells, comprising an outer shell and a rotating system rotating in the outer shell, wherein the rotating system comprises a rotating platform; the cells are detachably fixed on the rotating platform, and the rotating platform drives the cells to rotate; a passivation nozzle is fixedly provided in the outer shell, and the passivation nozzle is used for spraying a passivation raw material on the cross-section of the cells, and the passivation nozzle is arranged inside the outer shell along the circumferential direction.

Preferably, the rotating system further comprises a plurality of fixing parts placed along a circumferential direction on the rotating platform, the battery cells are detachably fixed on the fixing parts, and the rotating platform drives the plurality of fixing parts to rotate by rotating, so that the battery cells rotate.

Preferably, the fixing portion includes a first soft adhesive layer for clamping both sides of the stacked plurality of battery cells, so that the first soft adhesive layer is deformed to fit both sides of the stacked plurality of battery cells for clamping.

Preferably, the fixed part also includes a base plate connected to the rotating platform, a plurality of first elastic telescopic rods fixed on the base plate, and a support plate fixed to one end of the plurality of first elastic telescopic rods, both sides of the base plate are connected with side panel assemblies through a plurality of second elastic telescopic rods, and both ends of the support plate are hinged with push-pull rods hinged to the side panel assemblies.

Preferably, the side panel assembly includes a first side panel, a second side panel and a first spring, a first sliding groove is provided on one side of the first side panel, the second side panel is slidably arranged in the first sliding groove, one end of the second side panel is connected to the side wall of the first sliding groove through the first spring, the push-pull rod is hinged to the second side panel, and one side of the second side panel is connected to the first soft rubber layer.

Preferably, one side of the first side plate is rotatably connected to a gear, one side of the second side plate is rotatably connected to a traction rod that can be rotatably connected to an edge position of one side of the gear, an upper clamping plate is slidably provided on the upper side of the first side plate, and one end of the upper clamping plate is connected to a rack meshing with the gear.

Preferably, a second sliding groove is provided on the upper side of the first side plate, the upper pressing plate slides in the second sliding groove, limiting grooves are provided on both sides of the second sliding groove, and a limiting plate matching the limiting grooves is provided on the upper pressing plate.

Preferably, one end of the upper pressing plate is connected to a second soft rubber layer.

Preferably, a fixing plate is connected to one side of the supporting plate, and a supporting plate is connected to one end of the bottom plate. The supporting plate is provided with a plug-in slot so that the fixing plate can be inserted into the plug-in slot. A locking hole is provided on the fixing plate. A locking rod that can be inserted into the plug-in slot is slidably provided on one side of the support plate, and one end of the locking rod is connected to a return spring connected to the support plate.

Preferably, a first notch is provided on one side of one end of the fixing plate, and a second notch capable of counteracting the first notch is provided on one end of the locking rod.

Preferably, a rotating shaft is rotatably provided on the outer shell, the rotating platform is sleeved and fixed on the outer side of the rotating shaft, and a motor for driving the rotating shaft to rotate is provided on the outer shell.

Preferably, the rotating platform is further provided with an air suction member, and the air suction member and the passivation nozzle are respectively arranged on both sides of the fixing part.

Preferably, the passivation nozzle is arranged on the inner wall of the shell along the circumferential direction, and the air exhaust member is arranged on the inner side of the plurality of fixing parts.

Preferably, the air exhaust member is arranged on the outside of the fixing portion and connected to the outer shell, and the plurality of passivation nozzles are arranged on the inner sides of the plurality of fixing portions along the circumferential direction.

Preferably, the passivation nozzle includes an oxygen source nozzle and an aluminum source nozzle.

Preferably, the oxygen source nozzles and the aluminum source nozzles are arranged alternately.

Preferably, the oxygen source nozzle is a steam nozzle or an ozone nozzle.

Preferably, the aluminum source nozzle is a trimethylaluminum nozzle.

Preferably, the first elastic telescopic rod includes a first telescopic rod, a first telescopic tube and a first telescopic spring, the first telescopic rod is movably inserted in the first telescopic tube, the first telescopic spring is wound outside the first telescopic rod, two ends of the first telescopic spring are respectively fixedly connected to the side wall of the first telescopic rod and the outer side wall of the first telescopic tube, one end of the first telescopic rod is connected to the supporting plate, and one end of the first telescopic tube is connected to the bottom plate.

Preferably, the second elastic telescopic rod includes a second telescopic rod, a second telescopic tube and a second telescopic spring, the second telescopic rod is movably inserted in the second telescopic tube, the second telescopic spring is wound around the outside of the second telescopic rod, the two ends of the second telescopic spring are respectively fixedly connected to the side wall of the second telescopic rod and the outer side wall of the second telescopic passage, one end of the second telescopic rod is connected to the side plate assembly, and one end of the first telescopic tube is connected to the bottom plate.

An embodiment of the present application provides a device, including the solar cell passivation coating device described in any of the above embodiments.

In summary, the present invention mainly has the following beneficial effects:

The rotating platform rotates with the stacked cells. Under the action of centrifugal force, the passivation material that has entered the gap between two adjacent cells can be thrown out of the gap, effectively avoiding the accumulation of the passivation material between the gaps of adjacent cells.

When the stacked battery cells are placed and fixed, the stacked battery cells are placed on a supporting plate, and then the supporting plate is pressed, which can automatically fit and fix the edge gaps of the stacked battery cells and automatically offset the upper sides of the battery cells, not only firmly fixing the edges and tops of the battery cells, but also protecting the battery cells.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural block diagram of an embodiment of the present invention;

FIG2 is a structural block diagram of another embodiment of the present invention;

FIG3 is a three-dimensional structural diagram of a fixing part of the present invention;

FIG4 is an enlarged structural block diagram of position A in FIG3 of the present invention;

FIG5 is an enlarged structural block diagram of position B in FIG3 of the present invention;

FIG6 is a block diagram of the first side plate position structure of the present invention;

FIG7 is a block diagram of the upper pressing plate position structure of the present invention;

FIG8 is an enlarged structural block diagram of position C in FIG7 of the present invention;

FIG9 is an enlarged structural block diagram of position D in FIG8 of the present invention;

FIG. 10 is a cross-sectional structural diagram of the fixing plate position of the present invention.

Reference numerals:

1. Shell; 2. Rotating platform; 3. Fixed part; 4. Battery cell; 5. Passivation nozzle; 6. Ventilation part; 7. Feed port; 8. Discharge port; 9. Bottom plate; 10. First elastic telescopic rod; 11. Support plate; 12. Second elastic telescopic rod; 13. Side plate assembly; 14. Push-pull rod; 15. First side plate; 16. Second side plate; 17. First spring; 18. First sliding groove; 19. First soft rubber layer; 20. Gear; 21. Traction rod; 22. Upper pressing plate ; 23. Rack; 24. Second sliding groove; 25. Limiting groove; 26. Limiting plate; 27. Second soft rubber layer; 28. Fixing plate; 29. Support plate; 30. Plug-in groove; 31. Locking hole; 32. Locking rod; 33. Reset spring; 34. First notch; 35. Second notch; 36. Rotating shaft; 37. First telescopic cylinder; 38. First telescopic spring; 39. First telescopic rod; 40. Second telescopic rod; 41. Second telescopic cylinder; 42. Second telescopic spring.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

In conjunction with Figures 1 and 2, a solar cell passivation coating device of the present invention is used to passivate the cross-section of stacked cells 4, including a shell 1 and a rotating system rotating in the shell 1, the rotating system including a rotating platform 2; the cell 4 is detachably fixed on the rotating platform 2, and the rotating platform 2 drives the cell 4 to rotate; a passivation nozzle 5 is fixedly provided in the shell 1, and the passivation nozzle 5 is used to spray the passivation raw material on the cross-section of the cell 4, and the passivation nozzle 5 is arranged inside the shell 1 along the circumferential direction.

Specifically, as the rotating platform 2 drives the fixing part 3 to rotate, the passivation nozzle 5 sprays the passivation raw material to passivate the cross-section of the battery cell 4 into a metal film. The rotating platform 2 of the rotating system drives the stacked battery cells 4 to rotate, so that the raw material used for spraying passivation in the gaps between the battery cells 4 is thrown out, avoiding the passivation raw material from remaining on the side of the battery cell 4 that does not need passivation coating, and the battery cell 4 can be disassembled and installed on the rotating platform 2.

In some embodiments, in combination with Figures 1 and 2, the rotating system also includes a plurality of fixing parts 3 placed along a circumferential direction on the rotating platform 2, and the battery cell 4 is detachably fixed on the fixing part 3. The rotating platform 2 drives the plurality of fixing parts 3 to rotate by rotating, so that the battery cell 4 rotates.

Specifically, the rotation of the rotating platform 2 drives the fixing part 3 to rotate, so that the battery cell 4 can be installed and removed from the fixing part 3 .

In some embodiments, in combination with FIG. 6 , the fixing portion 3 includes a first soft adhesive layer 19 for clamping both sides of the stacked battery cells 4 , so that the first soft adhesive layer 19 is deformed to fit both sides of the stacked battery cells 4 for clamping.

Specifically, the two sides of the stacked battery cells 4 are deformably clamped by the clampable first soft adhesive layer 19, so that the clamping is more stable.

In some embodiments, the housing 1 can be configured to be coaxially stacked in multiple pieces so as to work simultaneously and increase work efficiency.

In some embodiments, a plurality of passivation nozzles 5 are provided, and are oriented toward the cross-section of the cell 4 .

In some embodiments, in combination with FIG. 1 , the housing 1 is provided with a feed port 7 and a discharge port 8 , and both the feed port 7 and the discharge port 8 are provided with a blocking door.

In some embodiments, the housing 1 can be placed vertically or horizontally to facilitate automated connection. When placed vertically, a blocking door is set in the axial direction. When placed horizontally, blocking doors are set at both ends, or it can be placed at a certain angle. The feed port 7 and the discharge port 8 are set at the upper side opening, or only one feed port is set for feeding and discharging. It is suitable for experimental machines and manual loading and unloading.

In some embodiments, when the battery cells 4 are placed on different fixing parts 3 , they are symmetrically placed relative to the rotation axis 36 , which makes them more stable during rotation.

In one embodiment, the exhaust member 6 is an exhaust air hole or an exhaust air head, and the exhaust air hole or the exhaust air head is connected to an external exhaust pump.

In some embodiments, the passivation nozzle 5 is connected to an external infusion pump.

In a further specific embodiment, in combination with Figures 1 and 3, the fixed part 3 includes a base plate 9 connected to the rotating platform 2, a plurality of first elastic telescopic rods 10 fixed on the base plate 9, and a supporting plate 11 fixed to one end of the plurality of first elastic telescopic rods 10, and both sides of the base plate 9 are connected to side panel assemblies 13 through a plurality of second elastic telescopic rods 12, and both ends of the supporting plate 11 are hinged with push-pull rods 14 hinged to the side panel assemblies 13.

Specifically, the battery cell 4 to be fixed is placed on the supporting plate 11, and the battery cell 4 is pressed down to overcome the elastic force of the first elastic telescopic rod 10. The side panel assembly 13 is pulled closer by the downward pressure of the battery cell 4 and the push-pull rod 14, and then the two sides of the battery cell 4 are squeezed, clamped and fixed.

In a further specific embodiment, in combination with Figures 3, 6 and 7, the side panel assembly 13 includes a first side panel 15, a second side panel 16 and a first spring 17, a first sliding groove 18 is provided on one side of the first side panel 15, the second side panel 16 is slidably arranged in the first sliding groove 18, one end of the second side panel 16 is connected to the side wall of the first sliding groove 18 through the first spring 17, the push-pull rod 14 is hinged to the second side panel 16, and one side of the second side panel 16 is connected to the first soft rubber layer 19.

Specifically, as the supporting plate 11 moves downward, it pulls the second side plate 16 downward, overcoming the elastic force of the first spring 17, and at the same time driving the second side plates 16 on both sides to move toward each other so that the first soft glue layer 19 is squeezed and fits the two sides of the stacked battery cells 4. The first soft glue layer 19 is slightly deformed and penetrates into the gap between the stacked battery cells 4, thereby fixing the battery cells 4 more firmly. The second side plate 16 can slide in the first sliding groove 18. During specific implementation, a sliding groove is set on one side of the first sliding groove 18, and a slider cooperating with the sliding groove is provided on the second side plate 16 to enable the second side plate 16 to slide firmly.

In a further specific embodiment, in combination with Figures 6 and 8, one side of the first side plate 15 is rotatably connected to a gear 20, one side of the second side plate 16 is rotatably connected to a traction rod 21 that can be rotatably connected to an edge position of one side of the gear 20, and an upper clamping plate 22 is slidably provided on the upper side of the first side plate 15, and one end of the upper clamping plate 22 is connected to a rack 23 that meshes with the gear 20.

Specifically, when the second side plate 16 moves downward, the gear 20 is driven to rotate through the traction rod 21, thereby driving the rack 23 to slide and drive the upper clamping plate 22 to slide on the first side plate 15, so that the upper clamping plate 22 slides just to the upper side of the stacked battery cells 4, thereby protecting and fixing the upper side of the battery cells 4.

In a further specific embodiment, in combination with Figures 8 and 9, a second sliding groove 24 is provided on the upper side of the first side plate 15, the upper clamping plate 22 slides in the second sliding groove 24, and limiting grooves 25 are provided on both sides of the second sliding groove 24. A limiting plate 26 matching the limiting groove 25 is provided on the upper clamping plate 22.

Specifically, the limiting plate 26 slides in the limiting groove 25 , which plays a role in limiting and stabilizing the sliding of the upper pressing plate 22 in the second sliding groove 24 .

In a further specific embodiment, in conjunction with FIG. 9 , a second soft rubber layer 27 is connected to one end of the upper pressing plate 22 .

Specifically, when the upper pressing plate 22 slides to the upper side of the battery cell 4 , the second soft adhesive layer 27 prevents the battery cell 4 from being damaged.

In a further specific embodiment, in combination with Figures 5 and 10, a fixing plate 28 is connected to one side of the supporting plate 11, and a support plate 29 is connected to one end of the bottom plate 9. The support plate 29 is provided with a plug-in slot 30 so that the fixing plate 28 can be inserted into the plug-in slot 30. A locking hole 31 is provided on the fixing plate 28. A locking rod 32 that can be inserted into the plug-in slot 30 is slidably provided on one side of the support plate 29, and one end of the locking rod 32 is connected to a return spring 33 connected to the support plate 29.

In a further specific embodiment, in conjunction with FIG. 5 and FIG. 10 , a first notch 34 is provided on one side of one end of the fixing plate 28 , and a second notch 35 capable of abutting against the first notch 34 is provided on one end of the locking rod 32 .

Specifically, during the downward movement of the supporting plate 11, the fixing plate 28 moves into the insertion slot 30, and is squeezed by the first notch 34 and the second notch 35, so that the fixing plate 28 squeezes the locking rod 32 to move toward the outside of the supporting plate 29. When the locking hole 31 is aligned with the locking rod 32, the locking rod 32 is inserted into the locking hole 31 by the action of the reset spring 33, thereby limiting and fixing the fixing plate 28.

In a further specific embodiment, in combination with FIG. 1 , a rotating shaft 36 is rotatably provided on the housing 1 , the rotating platform 2 is sleeved and fixed on the outside of the rotating shaft 36 , and a motor for driving the rotating shaft 36 to rotate is provided on the housing 1 (not shown in the figure).

Specifically, the motor drives the rotation of the rotating shaft 36 , thereby driving the rotation of the rotating platform 2 , and the rotating shaft 36 and the axial center line of the housing 1 are on the same vertical center line.

In a further specific embodiment, in conjunction with FIG. 1 , an air suction member 6 is further provided on the rotating platform 2 , and the air suction member 6 and the passivation nozzle 5 are respectively arranged on both sides of the fixing portion 3 .

Specifically, the exhaust member 6 has two functions. One is to extract the passivation raw material remaining in the gas in the shell 1 after coating. The other is to extract the air in the shell 1 before spraying the passivation raw material to reduce the effect of excess gas in the shell 1 interfering with the passivation.

In a further specific embodiment, in combination with FIG. 1 , the passivation nozzle 5 is arranged on the inner wall of the housing 1 along the circumferential direction, and the air suction member 6 is arranged on the inner side of the plurality of fixing portions 3 .

Specifically, the passivation nozzle 5 is arranged on the inner wall of the shell 1 and the outer side of the battery cell 4, and is arranged on the inner side of the battery cell 4 through the exhaust member 6. The exhaust member 6 is connected to the shell 1 to achieve the functions of passivation spraying and exhaust. In addition, since the passivation nozzle 5 is on the outside of the battery cell 4, the cross-section direction of the battery cell 4 faces outward when placed.

In a further specific embodiment, in conjunction with FIG. 2 , the air exhaust member 6 is disposed on the outer side of the fixing portion 3 and connected to the housing 1 , and the plurality of passivation nozzles 5 are disposed on the inner side of the plurality of fixing portions 3 along the circumferential direction.

Specifically, the passivation nozzle 5 is arranged on the outer shell 1, on the inner side of the battery cell 4, and the exhaust member 6 is arranged on the outer side of the battery cell 4 to achieve the functions of passivation spraying and exhaust. In addition, the passivation nozzle 5 is on the inner side of the battery cell 4, and the cross-section direction of the battery cell 4 faces inward when it is placed.

In a further specific embodiment, the passivation nozzle 5 includes an oxygen source nozzle and an aluminum source nozzle.

Specifically, an oxygen source is provided through an oxygen source nozzle, and an aluminum source is provided through an aluminum source nozzle, and an aluminum oxide film is generated by reaction.

In a further specific embodiment, the oxygen source nozzles and the aluminum source nozzles are alternately arranged.

Specifically, it is convenient to passivate the aluminum oxide film more uniformly and form multiple layers of aluminum oxide on the cut surface of the battery cell 4 .

In a further specific embodiment, the oxygen source nozzle is a steam nozzle or an ozone nozzle.

In a further specific embodiment, the aluminum source nozzle is a trimethylaluminum nozzle.

In a further specific embodiment, in combination with Figures 3 and 4, the first elastic telescopic rod 10 includes a first telescopic rod 39, a first telescopic tube 37 and a first telescopic spring 38. The first telescopic rod 39 is movably inserted in the first telescopic tube 37, and the first telescopic spring 38 is wound around the outside of the first telescopic rod 39. The two ends of the first telescopic spring 38 are respectively fixedly connected to the side wall of the first telescopic rod 39 and the outer side wall of the first telescopic tube 37. One end of the first telescopic rod 39 is connected to the supporting plate 11, and one end of the first telescopic tube 37 is connected to the bottom plate 9.

Specifically, the first telescopic spring 38 enables the first telescopic rod 39 to slide elastically on the first telescopic cylinder 37 . After the battery cell 4 is passivated, the first telescopic spring 38 resets the support plate 11 .

In a further specific embodiment, in combination with Figures 3 and 4, the second elastic telescopic rod 12 includes a second telescopic rod 40, a second telescopic tube 41 and a second telescopic spring 42. The second telescopic rod 40 is movably inserted in the second telescopic tube 41, and the second telescopic spring 42 is wound around the outside of the second telescopic rod 40. The two ends of the second telescopic spring 42 are respectively fixedly connected to the side wall of the second telescopic rod 40 and the outer side wall of the second telescopic tube 41. One end of the second telescopic rod 40 is connected to the side panel assembly 13, and one end of the first telescopic tube 37 is connected to the bottom plate 9.

Specifically, the second telescopic spring 42 enables the second telescopic rod 40 to slide elastically on the second telescopic cylinder. After the battery cell 4 is passivated, the side plate assembly 13 is reset by the second telescopic spring 42 .

An embodiment of the present application provides a device, including the solar cell passivation coating device described in any of the above embodiments.

Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims (18)

1. A solar cell passivation film plating device for passivating a cut surface of a stacked cell (4), which is characterized by comprising a shell (1) and a rotating system rotating in the shell (1), wherein the rotating system comprises a rotating platform (2) and a plurality of fixing parts (3) arranged on the rotating platform (2) along the circumferential direction;

the battery piece (4) is detachably fixed on the rotary platform (2), and the rotary platform (2) drives the battery piece (4) to rotate;

a passivation spray head (5) is fixedly arranged in the shell (1), the passivation spray head (5) is used for spraying and passivating raw materials on the section of the battery piece (4), and the passivation spray head (5) is arranged in the shell (1) along the circumferential direction;

The fixing part (3) comprises a bottom plate (9) connected with the rotary platform (2) and first soft adhesive layers (19) used for clamping and stacking the two sides of the plurality of battery pieces (4), and the two sides of the bottom plate (9) are connected with side plate assemblies (13) through a plurality of second elastic telescopic rods (12);

the side plate assembly (13) comprises a first side plate (15), a second side plate (16) and a first spring (17), a first sliding groove (18) is formed in one side of the first side plate (15), the second side plate (16) is arranged in the first sliding groove (18) in a sliding mode, one end of the second side plate (16) is connected with the side wall of the first sliding groove (18) through the first spring (17), a push-pull rod (14) is hinged to the second side plate (16), and one side of the second side plate (16) is connected with a first soft rubber layer (19).

2. The solar cell passivation film coating device according to claim 1, wherein the cell (4) is detachably fixed on the fixing portion (3), and the rotating platform (2) drives the fixing portions (3) to rotate through rotation so as to enable the cell (4) to rotate.

3. The solar cell passivation film coating device according to claim 2, wherein the first soft adhesive layer (19) is deformed to be attached to two sides of the stacked plurality of cells (4) for clamping.

4. The solar cell passivation film plating device according to claim 2, wherein the fixing portion (3) further comprises a plurality of first elastic telescopic rods (10) fixed on the bottom plate (9) and a supporting plate (11) fixed at one end of the plurality of first elastic telescopic rods (10), and push-pull rods (14) hinged with the side plate assemblies (13) are hinged at two ends of the supporting plate (11).

5. The solar cell passivation film coating device according to claim 1, characterized in that a gear (20) is rotatably connected to one side of the first side plate (15), a traction rod (21) capable of being rotatably connected with one side edge position of the gear (20) is rotatably connected to one side of the second side plate (16), an upper pressing plate (22) is slidingly arranged on the upper side of the first side plate (15), and a rack (23) meshed with the gear (20) is connected to one end of the upper pressing plate (22).

6. The solar cell passivation film coating device according to claim 5, wherein a second sliding groove (24) is formed in the upper side of the first side plate (15), the upper pressing plate (22) slides in the second sliding groove (24), limiting grooves (25) are formed in two sides of the second sliding groove (24), and limiting plates (26) matched with the limiting grooves (25) are arranged on the upper pressing plate (22).

7. The solar cell passivation film coating device according to claim 5, wherein one end of the upper pressing plate (22) is connected with a second soft adhesive layer (27).

8. The solar cell passivation film coating device according to claim 4, characterized in that a fixing plate (28) is connected and arranged on one side of the supporting plate (11), a supporting plate (29) is connected and arranged at one end of the bottom plate (9), a plugging groove (30) is arranged on the supporting plate (29) so that the fixing plate (28) can be inserted into the plugging groove (30), a locking hole (31) is arranged on the fixing plate (28), a locking rod (32) capable of being inserted into the plugging groove (30) is slidably arranged on one side of the supporting plate (29), and a reset spring (33) connected with the supporting plate (29) is connected and arranged at one end of the locking rod (32).

9. The solar cell passivation film coating device according to claim 8, wherein a first notch (34) is formed on one side of one end of the fixing plate (28), and a second notch (35) capable of being abutted against the first notch (34) is formed on one end of the locking rod (32).

10. The solar cell passivation film coating device according to claim 1, wherein a rotating shaft (36) is rotatably arranged on the housing (1), the rotating platform (2) is sleeved outside the rotating shaft (36) and is fixed, and a motor for driving the rotating shaft (36) to rotate is arranged on the housing (1).

11. The solar cell passivation film plating device according to claim 1, wherein an air suction member (6) is further arranged on the rotary platform (2), and the air suction member (6) and the passivation spray head (5) are respectively arranged on two sides of the fixing portion (3).

12. The solar cell passivation film coating device according to claim 11, wherein the passivation spray head (5) is arranged on the inner wall of the housing (1) along the circumferential direction, and the air suction member (6) is arranged on the inner sides of the plurality of fixing portions (3).

13. The solar cell passivation film coating device according to claim 11, wherein the air suction member (6) is arranged on the outer side of the fixing portion (3) and connected with the housing (1), and the passivation spray heads (5) are arranged on the inner sides of the fixing portions (3) along the circumferential direction.

14. The solar cell passivation film coating device according to claim 1, wherein the passivation spray head (5) comprises an oxygen source spray head and an aluminum source spray head.

15. The solar cell passivation film coating apparatus of claim 14, wherein the oxygen source spray head and the aluminum source spray head are alternately arranged.

16. The solar cell passivation film coating apparatus according to claim 14 or 15, wherein the oxygen source spray head is a water vapor spray head or an ozone spray head.

17. The solar cell passivation film coating apparatus of claim 14 or 15, wherein the aluminum source nozzle is a trimethylaluminum nozzle.

18. A solar cell passivation coating apparatus comprising a solar cell passivation coating device according to any one of claims 1 to 17.