Photovoltaic cell edge passivation liquid coating device

Abstract

The utility model relates to photovoltaic technical field especially relates to a kind of photovoltaic cell piece edge passivation liquid coating device.The photovoltaic cell piece edge passivation liquid coating device includes passivation liquid storage tank, diluent storage tank, drive assembly and coating component.Passivation liquid is contained in passivation liquid storage tank, diluent is contained in diluent storage tank.The import of drive assembly and passivation liquid storage tank and the import of diluent storage tank are all communicated.Coating component includes coating part, and coating component and the outlet of passivation liquid storage tank and the outlet of diluent storage tank are all communicated;Drive assembly can drive passivation liquid in passivation liquid storage tank and diluent in diluent storage tank to coating part, and diluent is configured to dilute passivation liquid in coating part.The photovoltaic cell piece edge passivation liquid coating device can reduce the restriction of passivation liquid storage tank installation, improve the flexibility of layout;Reduce the phenomenon that coating part becomes hard, improve the passivation effect to photovoltaic cell piece, save cost.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a device for applying passivation liquid to the edge of a photovoltaic cell. Background Technology

[0002] With the increasing global emphasis on new energy sources, photovoltaic cells, as a crucial component of this technology, play a key role in improving photovoltaic power generation efficiency and reducing costs. In the production of photovoltaic cells, passivation solution coating is a critical process, primarily used to protect the cut edges of the cells and prevent performance degradation due to oxidation and corrosion.

[0003] However, traditional passivation solution coating devices primarily rely on atmospheric pressure to force the passivation solution out of the bottle. The supply depends on the height difference of the liquid column, resulting in strict height restrictions on the passivation solution bottle and significantly reducing the flexibility of equipment layout. Furthermore, the passivation solution is prone to evaporation, leading to increased concentration. The coating sponge, due to absorbing the high concentration of passivation solution, will harden and solidify, increasing the cost of replacing and maintaining the coating sponge later and reducing the passivation effect on the photovoltaic cells.

[0004] Therefore, there is an urgent need to design a device for applying passivation liquid to the edge of photovoltaic cells to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a photovoltaic cell edge passivation liquid coating device, which reduces the restrictions on the installation of passivation liquid storage tanks, improves the flexibility of layout, reduces the hardening phenomenon of the coated part, improves the passivation effect of photovoltaic cells, and saves costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a device for applying passivation liquid to the edge of a photovoltaic cell, comprising:

[0008] A passivation solution storage tank and a diluent storage tank, wherein the passivation solution storage tank contains passivation solution and the diluent storage tank contains diluent;

[0009] A drive assembly, which is connected to both the inlet of the passivation liquid storage tank and the inlet of the diluent storage tank;

[0010] A coating assembly includes a coating section, which is connected to the outlet of the passivation liquid storage tank and the outlet of the diluent storage tank. A driving assembly is capable of driving the passivation liquid in the passivation liquid storage tank and the diluent in the diluent storage tank into the coating section, wherein the diluent is configured to dilute the passivation liquid in the coating section.

[0011] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the drive component includes a compressed air passage and a pressure regulating valve. The pressure regulating valve is disposed on the compressed air passage, and the output end of the compressed air passage is connected to the inlet of the passivation liquid storage tank and the inlet of the diluent storage tank. The pressure regulating valve is configured to regulate the pressure value of the compressed air.

[0012] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the drive assembly further includes a first solenoid valve, which is connected in series in the compressed air passage, and the inlet of the first solenoid valve is connected to the pressure regulating valve, and the outlet of the first solenoid valve is connected to both the passivation liquid storage tank and the diluent storage tank.

[0013] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the photovoltaic cell edge passivation liquid coating device includes a first manual valve and a second manual valve. One end of the first manual valve is connected to the outlet of the first solenoid valve, and the other end is connected to the inlet of the passivation liquid storage tank. One end of the second manual valve is connected to the outlet of the first solenoid valve, and the other end is connected to the inlet of the diluent storage tank.

[0014] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the photovoltaic cell edge passivation liquid coating device further includes a second solenoid valve, a first flow switch valve, and a second flow switch valve. The second solenoid valve and the first flow switch valve are connected in series in the passage between the outlet of the passivation liquid storage tank and the coating section. The second solenoid valve and the second flow switch valve are connected in series in the passage between the outlet of the diluent storage tank and the coating section.

[0015] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the photovoltaic cell edge passivation liquid coating device further includes a passivation liquid distribution block and a dilution liquid distribution block;

[0016] The inlet of the passivation liquid diversion block is connected to the outlet of the passivation liquid storage tank, and the outlet of the passivation liquid diversion block is connected to the coating section. The passivation liquid diversion block is used to divert a single passivation liquid into multiple streams and transport them to the coating section.

[0017] The inlet of the diluent diverter block is connected to the outlet of the diluent storage tank, and the outlet of the diluent diverter block is connected to the coating section. The diluent diverter block is used to divert a single stream of diluent into multiple streams and deliver them to the coating section.

[0018] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the coating assembly includes an upper pressure plate, a lower pressure plate, and a locking member. The upper pressure plate and the lower pressure plate are detachably connected by the locking member. An accommodating space is defined between the upper pressure plate and the lower pressure plate. The coating part is disposed in the accommodating space, and at least one side of the coating part is exposed and used to contact the edge of the photovoltaic cell.

[0019] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the accommodating space is configured as multiple, and the coating part corresponds to at least one of the accommodating spaces.

[0020] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the accommodating space is configured as multiple, and each accommodating space is provided with at least one coating part.

[0021] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the upper pressure plate is provided with multiple passivation liquid interfaces and multiple diluent interfaces, both of which penetrate the upper pressure plate; the passivation liquid interfaces are connected to the passivation liquid distribution block, and the diluent interfaces are connected to the diluent distribution block.

[0022] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the passivation liquid interface and the diluent interface are alternately arranged.

[0023] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the adjacent passivation liquid interface and the diluent interface are arranged at equal intervals.

[0024] As an optional technical solution for a photovoltaic cell edge passivation liquid coating device, the coating part is one of a coating sponge, a coating brush, a fiber felt, or a velvet cloth.

[0025] The beneficial effects of this utility model include at least the following:

[0026] This invention provides a photovoltaic cell edge passivation liquid coating device, which includes a passivation liquid storage tank, a diluent storage tank, a drive assembly, and a coating assembly. The passivation liquid storage tank contains passivation liquid, and the diluent storage tank contains diluent. The drive assembly is connected to the inlet of both the passivation liquid storage tank and the diluent storage tank. The coating assembly includes a coating section, and is connected to the outlet of both the passivation liquid storage tank and the diluent storage tank. The drive assembly drives the passivation liquid from the passivation liquid storage tank and the diluent from the diluent storage tank to the coating section, where the diluent is used to dilute the passivation liquid in the coating section.

[0027] In summary, the driving component of this invention can apply active driving force to drive the passivation liquid in the passivation liquid storage tank and the diluent in the diluent storage tank to the coating section. This eliminates the need for gravity-based delivery of the passivation liquid, as is present in existing technologies. It also removes the limitation imposed by the liquid column height on the installation location of the passivation liquid and diluent storage tanks, improving their layout flexibility. Furthermore, the diluent can be directly delivered to the coating section by the driving component to dilute the passivation liquid there, thus preventing the passivation liquid from evaporating on the coating section and causing an increase in concentration, which could lead to hardening and solidification of the coating section. This extends the service life of the coating section, reduces maintenance costs, and improves the passivation effect on the photovoltaic cells. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the photovoltaic cell edge passivation liquid coating device provided in this embodiment of the utility model;

[0030] Figure 2 This is a top view of the coating assembly provided in an embodiment of the present invention;

[0031] Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0032] Figure Labels

[0033] 10. Passivating solution storage tank; 20. Diluent storage tank; 30. Drive assembly; 31. Compressed air passage; 32. Pressure regulating valve; 33. First solenoid valve; 34. First manual valve; 35. Second manual valve; 40. Coating assembly; 41. Coating section; 42. Upper pressure plate; 43. Lower pressure plate; 44. Locking element; 45. Passivating solution interface; 46. Diluent interface; 50. Second solenoid valve; 60. First flow switch valve; 70. Second flow switch valve; 80. Passivating solution diverter block; 90. Diluent diverter block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] This embodiment provides a photovoltaic cell edge passivation liquid coating device, which reduces the limitation on the installation height of the passivation liquid storage tank and improves the flexibility of the layout; it also reduces the hardening phenomenon of the coated part, improves the passivation effect on the photovoltaic cell, and saves costs.

[0043] like Figures 1-3 As shown, the photovoltaic cell edge passivation liquid coating device mainly includes a passivation liquid storage tank 10, a diluent storage tank 20, a drive assembly 30, and a coating assembly 40. The passivation liquid storage tank 10 contains passivation liquid, and the diluent storage tank 20 contains diluent. The drive assembly 30 is connected to the inlet of both the passivation liquid storage tank 10 and the diluent storage tank 20. The coating assembly 40 includes a coating section 41, and is connected to the outlet of both the passivation liquid storage tank 10 and the diluent storage tank 20. The drive assembly 30 can drive the passivation liquid in the passivation liquid storage tank 10 and the diluent in the diluent storage tank 20 into the coating section 41, where the diluent is used to dilute the passivation liquid in the coating section 41.

[0044] Based on the above design, in this embodiment, the driving component 30 can apply an active driving force to drive the passivation liquid in the passivation liquid storage tank 10 and the diluent in the diluent storage tank 20 to the coating section 41. This eliminates the need for gravity-based delivery of the passivation liquid as in the prior art, removing the limitation imposed by the liquid column height on the installation positions of the passivation liquid storage tank 10 and the diluent storage tank 20, thus improving layout flexibility. Furthermore, the diluent can be directly delivered to the coating section 41 by the driving component 30 to dilute the passivation liquid in the coating section 41, thereby preventing the passivation liquid from evaporating on the coating section 41 and causing its concentration to increase, resulting in the coating section 41 hardening and solidifying. This extends the service life of the coating section 41, reduces maintenance costs, and improves the passivation effect on the photovoltaic cells.

[0045] Optionally, both the passivation solution storage tank 10 and the diluent storage tank 20 are made of 304 stainless steel. The drive assembly 30 is driven by compressed air and is compatible with common air sources in photovoltaic production lines. The air inlet of the drive assembly 30 is equipped with a quick-connect connector for connection to the factory's air supply network. The coating section 41 is made of high-density polyurethane.

[0046] Optionally, the diluent in this embodiment is industrial alcohol; the concentration of industrial alcohol is 95%-99.5%, which can dilute the passivation liquid in the coating part 41 while reducing the curing rate of the passivation liquid due to evaporation, thus preventing the coating part 41 from hardening and the liquid path from becoming blocked. In addition, the diluent in this embodiment can also be set as isopropanol solution, propylene glycol solution, etc.

[0047] Optionally, the coating part 41 in this embodiment can be configured as one of a coating sponge, a coating brush, a fiber felt, or a fleece. The coating sponge, coating brush, fiber felt, and fleece all have good adsorption and flexibility, and can closely fit the edge of the photovoltaic cell to ensure that the passivation liquid is uniformly applied to the edge of the cell. At the same time, when coating the edge of photovoltaic cells of different shapes or sizes, they can adapt to deformation to ensure the consistency of the coating effect.

[0048] like Figure 1 As shown, the drive component 30 in this embodiment includes a compressed air passage 31 and a pressure regulating valve 32. The pressure regulating valve 32 is disposed on the compressed air passage 31, and the output end of the compressed air passage 31 is connected to the inlet of the passivation liquid storage tank 10 and the inlet of the diluent storage tank 20. The pressure regulating valve 32 is configured to regulate the pressure value of the compressed air. By changing the compressed air pressure, the outflow pressure of the passivation liquid and the diluent can be directly controlled. Specifically, the higher the pressure, the faster the liquid flow rate; the lower the pressure, the slower the liquid flow rate. This achieves precise control of the flow rate of the passivation liquid and the diluent, improving the stability of the passivation effect.

[0049] Optionally, the compressed air passage 31 in this embodiment can be made of PU material.

[0050] Alternatively, the pressure regulating valve 32 can be a commonly available pilot-operated pressure regulating valve.

[0051] like Figure 1 As shown, the drive assembly 30 also includes a first solenoid valve 33, which is connected in series in the compressed air passage 31. The inlet of the first solenoid valve 33 is connected to the pressure regulating valve 32, and the outlet of the first solenoid valve 33 is connected to both the passivation liquid storage tank 10 and the diluent storage tank 20.

[0052] Specifically, the first solenoid valve 33 can receive signals through the production line PLC system to achieve automated linkage between opening the liquid supply when the photovoltaic cell arrives and closing the liquid supply when the photovoltaic cell leaves, replacing manual operation and improving production efficiency.

[0053] The outlet of the first solenoid valve 33 is simultaneously connected to the passivation liquid storage tank 10 and the diluent storage tank 20, which can realize the synchronous opening and closing of the passivation liquid and the diluent, ensuring that the two liquids are always supplied synchronously during the coating process, and further reducing the risk of operational errors.

[0054] In some optional embodiments, the first solenoid valve 33 is fixed on the equipment frame, the inlet of the first solenoid valve 33 is connected to the outlet of the pressure regulating valve 32 through a quick-connect fitting, and the outlet of the first solenoid valve 33 is connected to the passivation liquid storage tank 10 and the diluent storage tank 20 through a T-shaped three-way branch pipe.

[0055] like Figure 1 As shown, the photovoltaic cell edge passivation liquid coating device includes a first manual valve 34 and a second manual valve 35. One end of the first manual valve 34 is connected to the outlet of the first solenoid valve 33, and the other end is connected to the inlet of the passivation liquid storage tank 10. One end of the second manual valve 35 is connected to the outlet of the first solenoid valve 33, and the other end is connected to the inlet of the diluent storage tank 20.

[0056] When replenishing the passivation fluid, simply closing the first manual valve 34 will cut off the gas supply connected to the passivation fluid storage tank 10, allowing the diluent storage tank 20 to continue supplying fluid normally, and vice versa. This enables maintenance of one fluid path while maintaining normal production of the other, avoiding overall shutdown and improving production efficiency.

[0057] Optionally, both the first manual valve 34 and the second manual valve 35 are made of brass ball valves.

[0058] In some optional embodiments, the branch pipes of the first manual valve 34, the second manual valve 35 and the outlet of the first solenoid valve 33 are connected by threads, and the sealing method is to wrap with PTFE tape to prevent air leakage.

[0059] like Figure 1 As shown, the photovoltaic cell edge passivation liquid coating device also includes a second solenoid valve 50, a first flow switch valve 60, and a second flow switch valve 70. A portion of the interface of the second solenoid valve 50 and the first flow switch valve 60 are connected in series in the passage between the outlet of the passivation liquid storage tank 10 and the coating section 41; another portion of the interface of the second solenoid valve 50 and the second flow switch valve 70 are connected in series in the passage between the outlet of the diluent storage tank 20 and the coating section 41.

[0060] By setting up a second solenoid valve 50, a first flow switch valve 60, and a second flow switch valve 70, the passages for the passivation liquid and the diluent are controlled separately. This design enables independent and precise control of the flow rates of the two liquids, ensuring that they are mixed in a preset ratio and coated onto the edge of the photovoltaic cell.

[0061] The first flow switch valve 60 and the second flow switch valve 70 can monitor the flow rates of the passivation liquid and the diluent in real time, effectively avoiding problems such as uneven coating, liquid waste, or clogging. Optionally, in this embodiment, either the first flow switch valve 60 or the second flow switch valve 70 can be configured as one or two.

[0062] Optionally, the first solenoid valve 33 and the second solenoid valve 50 in this embodiment are both commercially available solenoid valves. Therefore, their working principle and specific structure will not be described in detail in this embodiment.

[0063] Optionally, both the first flow switch valve 60 and the second flow switch valve 70 can be turbine flow switches.

[0064] like Figure 1 As shown, the photovoltaic cell edge passivation liquid coating device also includes a passivation liquid diversion block 80 and a diluent diversion block 90. ​​The inlet of the passivation liquid diversion block 80 is connected to the outlet of the passivation liquid storage tank 10, and the outlet of the passivation liquid diversion block 80 is connected to the coating section 41. The passivation liquid diversion block 80 is used to divert a single stream of passivation liquid into multiple streams and transport them to the coating section 41. The inlet of the diluent diversion block 90 is connected to the outlet of the diluent storage tank 20, and the outlet of the diluent diversion block 90 is connected to the coating section 41. The diluent diversion block 90 is used to divert a single stream of diluent into multiple streams and transport them to the coating section 41.

[0065] Specifically, the inlet of the passivation liquid diverter block 80 is connected to the first flow switch valve 60, and the inlet of the diluent diverter block 90 is connected to the second flow switch valve 70. Both the passivation liquid diverter block 80 and the diluent diverter block 90 can evenly divide a single liquid path into multiple paths, ensuring that the passivation liquid and diluent are evenly distributed across the entire coating section 41. This improves the uniformity and quality of the coating, enhances the coating efficiency, and enables this photovoltaic cell edge passivation liquid coating device to meet the needs of large-scale production.

[0066] Multiple inlet points can be set according to the length direction of the coating section 41 to ensure that each area of ​​the coating section 41 can obtain a stable supply of passivation liquid and diluent, thereby further improving the quality of passivation of the cell edge.

[0067] In some optional embodiments, both the passivation liquid diversion block 80 and the dilution liquid diversion block 90 are made of aluminum alloy and have several equal-diameter flow channels inside.

[0068] like Figures 2-3 As shown, in this embodiment, the coating assembly 40 includes an upper pressure plate 42, a lower pressure plate 43, and a locking member 44. The upper pressure plate 42 and the lower pressure plate 43 are detachably connected by the locking member 44. An accommodating space is defined between the upper pressure plate 42 and the lower pressure plate 43. The coating part 41 is disposed in the accommodating space. At least one side of the coating part 41 is exposed and used to contact the edge of the photovoltaic cell.

[0069] During maintenance, the operator can loosen the locking piece 44 to separate the upper pressure plate 42 and the lower pressure plate 43, directly remove the old coating part 41 and put in the new coating part 41, without the need to clean the glue or disassemble complex parts, saving maintenance time and improving maintenance efficiency.

[0070] In some alternative embodiments, the accommodating space may be located in the lower pressure plate 43, or in the upper pressure plate 42, or in both the lower pressure plate 43 and the upper pressure plate 42.

[0071] In some optional embodiments, both the upper pressure plate 42 and the lower pressure plate 43 are made of 5mm thick aluminum alloy sheet. The locking element 44 is a wing nut and matching bolt.

[0072] Preferably, in this embodiment, there are multiple accommodating spaces, and each accommodating space is provided with at least one coating part 41. Multiple accommodating spaces can simultaneously install multiple sets of coating parts 41, achieving the purpose of coating multiple photovoltaic cells at one time, saving time and improving production efficiency.

[0073] For example, two receiving spaces can be provided to accommodate the parallel coating requirements of photovoltaic half-cells. The two receiving spaces are arranged side by side along the length of the coating assembly 40, and the distance between the two receiving spaces matches the photovoltaic cell conveying distance to avoid collision between the two photovoltaic cells.

[0074] In some optional embodiments, there are multiple accommodating spaces, with the coating portion 41 corresponding to at least one accommodating space. For example, the coating portion may be a one-piece molded coating sponge having multiple different regions, each region corresponding to one accommodating space.

[0075] like Figures 2-3As shown, in this embodiment, the upper pressure plate 42 is provided with multiple passivation liquid interfaces 45 and multiple diluent interfaces 46. Both the passivation liquid interfaces 45 and the diluent interfaces 46 penetrate the upper pressure plate 42. The passivation liquid interfaces 45 are connected to the passivation liquid diversion block 80, and the diluent interfaces 46 are connected to the diluent diversion block 90.

[0076] Furthermore, in this embodiment, the passivation liquid interface 45 and the diluent interface 46 are alternately arranged. Adjacent passivation liquid interfaces 45 and diluent interfaces 46 are equally spaced. Alternating arrangement can avoid the concentration of the same type of liquid; equally spaced arrangement can ensure that the mixing ratio is consistent at each location, further improving the mixing uniformity of the two liquids, thereby avoiding the phenomenon of passivation liquid solidification due to excessive local concentration, and avoiding the passivation effect on the edge of photovoltaic cells being reduced due to excessive local dilution of the passivation liquid.

[0077] For example, the distance between adjacent passivation fluid interface 45 and diluent interface 46 can be set to 5 mm.

[0078] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0079] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A device for applying passivation liquid to the edge of a photovoltaic cell, characterized in that, include: The passivation liquid storage tank (10) and the diluent storage tank (20) contain passivation liquid and diluent, respectively. The drive assembly (30) is connected to the inlet of the passivation liquid storage tank (10) and the inlet of the diluent storage tank (20); The coating assembly (40) includes a coating section (41), which is connected to the outlet of the passivation liquid storage tank (10) and the outlet of the diluent storage tank (20). The driving assembly (30) is capable of driving the passivation liquid in the passivation liquid storage tank (10) and the diluent in the diluent storage tank (20) into the coating section (41), wherein the diluent is configured to dilute the passivation liquid in the coating section (41).

2. The photovoltaic cell edge passivation liquid coating device according to claim 1, characterized in that, The drive assembly (30) includes a compressed air passage (31) and a pressure regulating valve (32). The pressure regulating valve (32) is disposed on the compressed air passage (31). The output end of the compressed air passage (31) is connected to the inlet of the passivation liquid storage tank (10) and the inlet of the diluent storage tank (20). The pressure regulating valve (32) is configured to regulate the pressure value of the compressed air.

3. The photovoltaic cell edge passivation liquid coating device according to claim 2, characterized in that, The drive assembly (30) further includes a first solenoid valve (33), which is connected in series in the compressed air passage (31). The inlet of the first solenoid valve (33) is connected to the pressure regulating valve (32), and the outlet of the first solenoid valve (33) is connected to both the passivation liquid storage tank (10) and the diluent storage tank (20).

4. The photovoltaic cell edge passivation liquid coating device according to claim 3, characterized in that, The photovoltaic cell edge passivation liquid coating device includes a first manual valve (34) and a second manual valve (35). One end of the first manual valve (34) is connected to the outlet of the first solenoid valve (33), and the other end is connected to the inlet of the passivation liquid storage tank (10). One end of the second manual valve (35) is connected to the outlet of the first solenoid valve (33), and the other end is connected to the inlet of the diluent storage tank (20).

5. The photovoltaic cell edge passivation liquid coating device according to claim 1, characterized in that, The photovoltaic cell edge passivation liquid coating device further includes a second solenoid valve (50), a first flow switch valve (60), and a second flow switch valve (70). The second solenoid valve (50) and the first flow switch valve (60) are connected in series in the passage between the outlet of the passivation liquid storage tank (10) and the coating section (41). The second solenoid valve (50) and the second flow switch valve (70) are connected in series in the passage between the outlet of the diluent storage tank (20) and the coating section (41).

6. The photovoltaic cell edge passivation liquid coating apparatus according to claim 1, characterized in that, The photovoltaic cell edge passivation liquid coating device also includes a passivation liquid distribution block (80) and a dilution liquid distribution block (90). The inlet of the passivation liquid diversion block (80) is connected to the outlet of the passivation liquid storage tank (10), and the outlet of the passivation liquid diversion block (80) is connected to the coating section (41). The passivation liquid diversion block (80) is used to divert a single passivation liquid into multiple streams and transport them to the coating section (41). The inlet of the diluent diverter block (90) is connected to the outlet of the diluent storage tank (20), and the outlet of the diluent diverter block (90) is connected to the coating section (41). The diluent diverter block (90) is used to divert a single diluent into multiple diluents and deliver them to the coating section (41).

7. The photovoltaic cell edge passivation liquid coating apparatus according to claim 6, characterized in that, The coating assembly (40) includes an upper pressure plate (42), a lower pressure plate (43), and a locking member (44). The upper pressure plate (42) and the lower pressure plate (43) are detachably connected by the locking member (44). An accommodating space is defined between the upper pressure plate (42) and the lower pressure plate (43). The coating part (41) is disposed in the accommodating space. At least one side of the coating part (41) is exposed and used to contact the edge of the photovoltaic cell.

8. The photovoltaic cell edge passivation liquid coating apparatus according to claim 7, characterized in that, The accommodating space is configured as a plurality of such spaces, and the coating part (41) corresponds to at least one of the accommodating spaces.

9. The photovoltaic cell edge passivation liquid coating apparatus according to claim 8, characterized in that, At least one coating portion (41) is provided in each of the accommodating spaces.

10. The photovoltaic cell edge passivation liquid coating apparatus according to claim 7, characterized in that, The upper pressure plate (42) is provided with multiple passivation liquid interfaces (45) and multiple diluent interfaces (46), both of which penetrate the upper pressure plate (42); the passivation liquid interface (45) is connected to the passivation liquid diversion block (80), and the diluent interface (46) is connected to the diluent diversion block (90).

11. The photovoltaic cell edge passivation liquid coating apparatus according to claim 10, characterized in that, The passivation liquid interface (45) and the diluent interface (46) are alternately provided.

12. The photovoltaic cell edge passivation liquid coating apparatus according to claim 11, characterized in that, The passivation liquid interface (45) and the diluent interface (46) are arranged at equal intervals.

13. The photovoltaic cell edge passivation liquid coating apparatus according to any one of claims 1-12, characterized in that, The coating part (41) is one of the following: coating sponge, coating brush, fiber felt or velvet.

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