Electroplating bath device for electroplating solar cell

Abstract

The utility model relates to an electroplating bath device for electroplating a solar cell, which comprises a bath body, baffle components are respectively mounted at the head section and the tail section in the bath body in a matching manner, so that a bath building area is formed in the bath body between the two baffle components, and a single group of baffle components are obliquely arranged. A dropper set and a conveying roller set are sequentially installed in the tank body from top to bottom in a matched mode, the dropper set is connected with the output end of a liquid supply system, the liquid supply system drips liquid medicine to solar cells on the conveying roller set at regular time through the dropper set, and the conveying roller set is connected with the output end of a driving assembly. The conveying roller set is driven by the driving assembly to rotate, so that the solar cell pieces are conveyed in an oriented mode, and then the solar cell pieces are electroplated in the bath building area. By arranging the baffle assembly and the dropper, the liquid medicine in the tank body can be prevented from fluctuating, the stability of the liquid medicine is effectively improved, and the electroplating uniformity and the electroplating quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of solar cell manufacturing technology, and in particular to an electroplating tank device for solar cell electroplating. Background Technology

[0002] Electroplating is a core process in solar cell manufacturing. It is used to deposit a thin metallic film on the surface of solar cell substrates, which can improve the photoelectric conversion efficiency of solar cells and increase their stability and durability.

[0003] In existing technologies, the electroplating solution continuously flows out of the electroplating tank during the electroplating process, undergoes certain treatments, and then flows back into the electroplating tank through a return hole. Simultaneously, as the electroplating process continues, it is necessary to periodically spray replenishing chemicals into the electroplating tank at a certain pressure and flow rate via a spray module to maintain the stability and uniformity of the electroplating solution. However, during the return and replenishment of the electroplating solution, the supply of chemicals to the electroplating tank at a certain pressure and flow rate causes fluctuations in the solution within the tank, resulting in uneven electroplating and affecting the electroplating quality of solar cells. Utility Model Content

[0004] Therefore, it is necessary to provide an electroplating tank device for solar cell electroplating to address the problems of fluctuations and poor stability of the electroplating solution in the electroplating tank during the electroplating solution recirculation and replenishment process in the existing technology, which leads to poor electroplating uniformity and low electroplating quality.

[0005] The technical solution adopted in this utility model is as follows:

[0006] An electroplating tank device for solar cell electroplating includes a tank body. Baffle assemblies are respectively installed at the first and last sections of the tank body, forming a bath preparation zone within the tank body between the two baffle assemblies. A single set of baffle assemblies is arranged at an angle. A dripping tube assembly and a conveying roller assembly are sequentially installed from top to bottom inside the tank body. The dripping tube assembly is connected to the output end of a liquid supply system. The liquid supply system periodically drips chemicals onto the solar cells on the conveying roller assembly via the dripping tube assembly. The conveying roller assembly is connected to the output end of a drive assembly, which drives the conveying roller assembly to rotate, thereby directionally conveying the solar cells and electroplating them within the bath preparation zone.

[0007] As a further improvement to the above technical solution:

[0008] The first and last sections inside the tank are respectively equipped with cleaning boxes, and the two cleaning boxes are arranged on one side of the two sets of baffle assemblies.

[0009] The first and last sections inside the tank are respectively fixed with upper partitions, and the two upper partitions are located directly above the two sets of baffle assemblies.

[0010] The structure of a single baffle assembly is as follows: it includes a fixing plate that is inclined and fixed to the bottom wall of the tank, and a liquid baffle is installed on the end face of the fixing plate.

[0011] The conveying roller assembly includes several conveying rollers. The structure of a single conveying roller is as follows: it includes a roller shaft, and two sliders are respectively installed at both ends of the roller shaft. One slider is limited by a retaining ring, and the other slider is limited by a transmission gear assembly.

[0012] The conveying roller assembly is rotatably installed in the trough via a support plate assembly. The support plate assembly includes two spaced-apart side support plates. Several receiving slots are spaced-apart along the length direction on the top of each side support plate. By simultaneously inserting two sliders from a conveying roller into the corresponding two receiving slots, the conveying roller and the support plate assembly are installed together.

[0013] The outer wall of a single slider is symmetrically provided with limiting protrusions, which prevent the slider from falling out of the corresponding receiving groove.

[0014] A mounting hole is provided on the end face of each slider for mounting to the corresponding roller.

[0015] The dropper assembly includes several droppers. The structure of a single dropper is as follows: it includes a tube body, with mounting blocks installed at both ends of the tube body. The tube body is installed in conjunction with the tank body through the mounting blocks. The tube body includes several hollow tube segments. Adjacent tube segments are connected by connecting blocks. A liquid inlet connector is provided on the side wall of a single tube segment. A liquid inlet hole is opened in the middle of the liquid inlet connector. The liquid inlet hole communicates with the internal space of the corresponding tube segment. Several drip holes are also opened on the side wall of a single tube segment, which are evenly spaced along the length direction.

[0016] The liquid supply system injects medicine into the corresponding tube segment through the liquid inlet connector, and the medicine in a single tube segment drips evenly through the drip hole.

[0017] An array of return holes is formed on the bottom wall of the tank. The return hole array is used for the return of the medicine. Each return hole array includes several return holes arranged at intervals along the width of the tank. A water baffle ring is installed on each return hole.

[0018] The beneficial effects of this utility model are as follows:

[0019] This utility model features a compact and reasonable structure, and is easy to operate. By setting up a baffle assembly, a bath preparation zone can be formed in the tank. The inclined baffle assembly ensures that the solar cells on the conveyor roller group can contact the first conveyor roller in the bath preparation zone as soon as they enter, thereby preventing the solar cells from "heading down" and avoiding material jamming. In addition, the baffle assembly can also prevent chemical foam from entering the bath preparation zone, effectively ensuring the quality of the chemical solution in the bath preparation zone. By setting up a drip tube assembly, the chemical solution provided by the liquid supply system can be evenly dripped into the tank, thereby avoiding fluctuations in the chemical solution in the tank, effectively improving the stability of the chemical solution, and improving the electroplating uniformity and quality.

[0020] This utility model also has the following advantages:

[0021] (1) By adjusting the installation position of the baffle plate on the fixed plate and the liquid baffle plate, the liquid level of the medicine in the bathing area can be effectively adjusted, thereby adjusting the degree of contact between the medicine and the solar cell.

[0022] (2) By setting up a cleaning box, it is possible to effectively prevent foreign objects from scratching the solar cells or causing solar cell fragments, and to prevent the chemical solution in the tank from splashing.

[0023] (3) By setting up a dropper, multiple drip cavities are formed inside, which can supply liquid to the tank evenly and stably, thereby improving the uniformity of the medicine in the tank; at the same time, the medicine in the drip cavity drips into the tank, and its dripping process is stable and controllable, thereby avoiding splashing of medicine in the tank and reducing the fluctuation of medicine in the tank.

[0024] (4) By setting side support plates and sliders, the conveyor rollers can be quickly disassembled and installed, making maintenance and replacement convenient.

[0025] (5) By setting up a water baffle ring, it is possible to effectively prevent the backflow of the medicine from generating vortices, thus avoiding affecting the stability of the medicine surface in the tank and the speed of the solar cells in the tank. At the same time, the side wall of the water baffle ring is provided with several openings along the circumference, which can prevent foreign objects and debris in the tank from blocking one of the openings and affecting the flow rate of the medicine backflow, thereby further improving the stability of the medicine surface in the tank and effectively reducing the difficulty of liquid level control in the tank. In addition, a filter screen is installed on each opening to prevent foreign objects and debris in the tank from falling into the backflow hole. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention (some droppers in the dropper assembly and the conveying rollers in the conveying roller assembly are omitted).

[0027] Figure 2 This is a schematic diagram of the present invention, omitting the drip tube assembly and the conveying roller assembly.

[0028] Figure 3 for Figure 2 Top view.

[0029] Figure 4 for Figure 3 A sectional view of section AA in the middle.

[0030] Figure 5 This is a schematic diagram of the conveying roller in this utility model.

[0031] Figure 6 for Figure 5 Exploded view.

[0032] Figure 7 for Figure 5 Top view.

[0033] Figure 8 This is a schematic diagram of the dropper structure in this utility model.

[0034] Figure 9 for Figure 8 Top view.

[0035] Figure 10 for Figure 9 Sectional view of section BB.

[0036] Figure 11 for Figure 10 A magnified view of a portion of point A in the middle.

[0037] The components include: 1. Tank body; 2. Cleaning box; 3. Baffle assembly; 4. Upper partition; 5. Side support plate; 6. Receiving trough; 7. Water-retaining ring; 8. Conveying roller; 9. Drip tube;

[0038] 301. Liquid baffle; 302. Fixing plate;

[0039] 801. Roller shaft; 802. Slider; 803. Retaining ring; 804. Transmission gear assembly; 805. Mounting groove; 806. Mounting hole; 807. Limiting flange;

[0040] 901. Tube body segment; 902. Connecting block; 903. Mounting block; 904. Drip hole; 905. Liquid inlet connector; 906. Liquid inlet. Detailed Implementation

[0041] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0042] The structure and function of this utility model are as follows:

[0043] like Figures 1-11As shown, an electroplating tank device for solar cell electroplating includes a tank body 1. Baffle assemblies 3 are respectively installed at the first and last sections inside the tank body 1, thereby forming a bath preparation area inside the tank body 1 between the two baffle assemblies 3. The single set of baffle assemblies 3 is arranged at an angle. A drip tube assembly and a conveying roller assembly are installed sequentially from top to bottom inside the tank body 1. The drip tube assembly is connected to the output end of a liquid supply system. The liquid supply system drips chemical solution onto the solar cells on the conveying roller assembly at regular intervals through the drip tube assembly. The conveying roller assembly is connected to the output end of a drive assembly. The drive assembly drives the conveying roller assembly to rotate, thereby directionally conveying the solar cells, and then electroplating the solar cells in the bath preparation area. By setting up the baffle assembly 3, a bath preparation zone can be formed in the tank 1. The inclined baffle assembly 3 can ensure that the solar cells on the conveyor roller group can contact the first conveyor roller 8 in the bath preparation zone as soon as they enter the bath preparation zone, thereby avoiding the "head-down" phenomenon of the solar cells and preventing material jamming. In addition, the baffle assembly 3 can also prevent chemical foam from entering the bath preparation zone from the outside, effectively ensuring the quality of the chemical in the bath preparation zone. By setting up the drip tube group, the chemical provided by the liquid supply system can be evenly dripped into the tank 1, thereby avoiding fluctuations in the chemical in the tank 1, effectively improving the stability of the chemical, and improving the electroplating uniformity and electroplating quality.

[0044] The electroplating tank device of this utility model includes a tank body 1, a baffle assembly 3, a drip tube assembly, and a conveying roller assembly; wherein,

[0045] The tank 1 is formed by several wall panels, which serve as the mounting frame for the electroplating tank device. The tank contains the electroplating solution. Along the length of the tank 1, the tank 1 is divided into a first section, a middle section, and a tail section by two sets of baffle assemblies 3. The middle section corresponds to the bath preparation area, while the first and tail sections are the solar cell feeding / discharging waiting areas.

[0046] Several outflow holes are opened on the wall of tank 1, and the medicine in tank 1 flows out to the outside through the outflow holes; electromagnetic valves can be installed at the outflow holes to control the flow rate and time of the medicine.

[0047] An array of return holes is formed on the bottom wall of the tank 1. These return hole arrays are used for chemical return. Each return hole array includes several return holes spaced apart along the width of the tank 1, and a baffle ring 7 is installed on each return hole. By setting the baffle ring 7, vortexes can be effectively prevented from forming in the returned chemical solution, thus avoiding affecting the stability of the chemical solution level in the tank 1 and the travel speed of the solar cells in the tank 1. At the same time, several openings are set along the circumference of the side wall of the baffle ring 7, which can prevent foreign objects and debris in the tank 1 from blocking one of the openings and affecting the flow rate of the chemical return, thereby further improving the stability of the chemical solution level in the tank 1 and effectively reducing the difficulty of level control in the tank 1. In addition, a filter screen is installed on each opening to prevent foreign objects and debris in the tank from falling into the return hole.

[0048] Cleaning boxes 2 are installed at the first and last sections of the tank 1, respectively, with the two cleaning boxes 2 arranged on either side of the two sets of baffle assemblies 3. The cleaning boxes 2 are located outside the bathing area and contain cleaning fluid. By setting up the cleaning boxes 2, it is possible to effectively prevent foreign objects from scratching the solar cells or causing solar cell fragments. They can also clean the conveying rollers 8 above them, washing away foreign objects (such as crystals) adhering to the outer wall of the conveying rollers 8. At the same time, the cleaning boxes 2 are also used to collect the chemical solution overflowing from the baffle 301, thereby preventing the chemical solution in the bathing area from splashing and generating new crystal particles when it overflows to the first and last sections of the tank 1. In addition, one of the cleaning boxes 2 is arranged above one of the sets of return hole groups. When the return chemical solution is introduced, the bottom plate of the cleaning box 2 can prevent the return chemical solution from splashing.

[0049] The first and last sections inside the tank 1 are each fixed with an upper baffle 4, and the two upper baffles 4 are located directly above the two sets of baffle assemblies 3. A narrow slit is provided between each upper baffle 4 and the corresponding liquid baffle 301 to allow the solar cells to pass through.

[0050] The conveyor roller assembly includes several conveyor rollers 8, such as Figures 5-7 As shown, the structure of a single conveying roller 8 is as follows: it includes a roller shaft 801, with sliders 802 respectively installed at both ends of the roller shaft 801. One slider 802 is limited by a retaining ring 803, and the other slider 802 is limited by a transmission gear assembly 804. The single conveying roller 8 includes a roller shaft 801, two symmetrically arranged sliders 802, a retaining ring 803, and a transmission gear assembly 804. The roller shaft 801 is made of titanium, with a PP bushing wrapped around its outer circumference. The sliders 802 are used to cooperate with a support plate assembly, and the retaining ring 803 is used to limit the axial displacement of the roller shaft 801. The transmission gear assembly 804, on the one hand, limits the axial displacement of the roller shaft 801, and on the other hand, meshes with a corresponding drive gear assembly. The drive gear assembly is connected to the output end of a corresponding rotary drive assembly (such as a rotary motor). The rotary drive assembly drives the transmission gear assembly 804 to rotate through the drive gear assembly, thereby driving the corresponding roller shaft 801 to rotate, and thus conveying the solar cells.

[0051] The conveyor roller assembly is rotatably mounted in the trough 1 via a support plate assembly. The support plate assembly includes two spaced-apart side support plates 5. Several spaced-apart receiving slots 6 are formed on the top of each side support plate 5 along its length. The conveyor roller 8 and the support plate assembly are fitted together by simultaneously inserting two sliders 802 from one conveyor roller 8 into the corresponding two receiving slots 6. Each receiving slot 6 is U-shaped, corresponding to the shape of a single slider 802.

[0052] A limiting flange 807 is symmetrically provided on the outer wall of a single slider 802. The two limiting flanges 807 prevent the slider 802 from falling out of the corresponding receiving groove 6. By setting the receiving groove 6 and the limiting flange 807, the corresponding conveying roller 8 and the support plate group can be quickly disassembled and assembled, which facilitates the later maintenance and replacement of the conveying roller 8.

[0053] A mounting hole 806 is provided on the end face of a single slider 802 for mounting with the corresponding roller shaft 801. The single slider 802 is rotatably engaged with the corresponding roller shaft 801 through the mounting hole 806; a U-shaped mounting groove 805 is also provided on the single slider 802, which provides mounting space for the retaining ring 803, thereby making the structural components compact.

[0054] The drip irrigation system is positioned to correspond to the bathing area. Each drip irrigation system consists of several drip tubes (9, such as...). Figures 8-11 As shown, the structure of a single dropper 9 is as follows: it includes a tube body, with mounting blocks 903 installed at both ends of the tube body. The tube body is installed in conjunction with the tank body 1 through the mounting blocks 903. The tube body includes several hollow tube segments 901. Adjacent tube segments 901 are connected by connecting blocks 902. A liquid inlet connector 905 is provided on the side wall of a single tube segment 901. A liquid inlet hole 906 is opened in the middle of the liquid inlet connector 905. The liquid inlet hole 906 communicates with the internal space of the corresponding tube segment 901. Several drip holes 904 are also opened on the side wall of a single tube segment 901, which are evenly spaced along the length direction. The liquid supply system injects medicine into the corresponding tube segment 901 through the liquid inlet connector 905. The medicine in a single tube segment 901 drips evenly through the drip holes 904. The single dropper 9 includes a tube body and two mounting blocks 903. The tube body includes several cylindrical and hollow tube segments 901, which are connected by cross-shaped connecting blocks 902. In this invention, the first tube segment 901 and its corresponding mounting block 903 and corresponding connecting block 902, the last tube segment 901 and its corresponding mounting block 903 and corresponding connecting block 902, and the remaining tube segments 901 and their connecting blocks 902 at both ends form independent drip cavities. These cavities can uniformly and stably supply liquid to the tank 1, thereby improving the uniformity of the medicinal solution in the bathing area. At the same time, the medicinal solution in the dripping cavity drips into the bathing area in a stable and controllable manner, thus avoiding splashing of the medicinal solution in the bathing area and reducing fluctuations in the surface of the medicinal solution in the bathing area.

[0055] The structure of the single baffle assembly 3 is as follows: it includes a fixing plate 302 that is inclinedly fixed to the bottom wall of the tank 1, and a liquid baffle 301 is fitted on the end face of the fixing plate 302. In this utility model, the liquid baffle 301 is inclined towards the bathing area, and the fixing plate 302 is used to install the liquid baffle 301. By adjusting the installation position of the liquid baffle 301 on the fixing plate 302, the liquid level of the medicine in the bathing area can be effectively adjusted, thereby adjusting the degree of contact between the medicine and the solar cell.

[0056] The working process of this utility model is as follows:

[0057] The liquid supply system injects medicine into the drip set at regular intervals and in quantitative amounts. The medicine inside each drip tube 9 in the drip set drips evenly into the middle section of the tank 1 through the corresponding drip hole 904.

[0058] The rotary drive assembly drives the transmission gear assembly 804 to rotate via the drive gear assembly, thereby driving the corresponding roller 801 to rotate, and thus transporting the solar cells.

[0059] As the solar cell moves forward and passes through the bathing area, under the influence of the electric current, metal ions in the solution are deposited on the surface of the solar cell, forming the required coating, thus completing the electroplating process.

[0060] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. An electroplating tank apparatus for electroplating solar cells, characterized in that: The system includes a tank (1), with baffle assemblies (3) installed at the first and last sections of the tank (1) to form a bathing zone between the two baffle assemblies (3). The baffle assemblies (3) are arranged at an angle. Inside the tank (1), a drip tube assembly and a conveying roller assembly are installed sequentially from top to bottom. The drip tube assembly is connected to the output end of the liquid supply system. The liquid supply system sprays liquid onto the solar cells on the conveying roller assembly at regular intervals through the drip tube assembly. The conveying roller assembly is connected to the output end of the drive assembly. The drive assembly drives the conveying roller assembly to rotate, thereby directionally conveying the solar cells and electroplating them in the bathing zone.

2. The electroplating tank apparatus for solar cell electroplating as described in claim 1, characterized in that: The first and last sections inside the tank (1) are respectively equipped with cleaning boxes (2), and the two cleaning boxes (2) are respectively arranged on one side of the two sets of baffle assemblies (3).

3. The electroplating tank apparatus for solar cell electroplating as described in claim 1, characterized in that: The first and last sections inside the trough (1) are respectively fixed with upper partitions (4), and the two upper partitions (4) are located directly above the two sets of baffle assemblies (3).

4. The electroplating tank apparatus for solar cell electroplating as described in claim 1, characterized in that: The structure of the single baffle assembly (3) is as follows: it includes a fixing plate (302) that is inclined and fixed to the bottom wall of the tank (1), and a liquid baffle (301) is installed on the end face of the fixing plate (302).

5. The electroplating tank apparatus for solar cell electroplating as described in claim 1, characterized in that: The conveying roller group includes several conveying rollers (8). The structure of a single conveying roller (8) is as follows: it includes a roller shaft (801), and two ends of the roller shaft (801) are respectively fitted with sliders (802). One slider (802) is limited by a retaining ring (803), and the other slider (802) is limited by a transmission gear assembly (804).

6. The electroplating tank apparatus for electroplating solar cells as described in claim 5, characterized in that: The conveying roller assembly is rotatably installed in the trough (1) via a support plate assembly. The support plate assembly includes two spaced side support plates (5). Several receiving slots (6) are spaced along the length direction on the top of each side support plate (5). By simultaneously inserting two sliders (802) in a conveying roller (8) into the corresponding two receiving slots (6), the conveying roller (8) and the support plate assembly are installed together.

7. The electroplating tank apparatus for solar cell electroplating as described in claim 6, characterized in that: A limiting flange (807) is symmetrically provided on the outer wall of a single slider (802), and the slider (802) is prevented from falling out of the corresponding receiving groove (6) by the two limiting flanges (807).

8. The electroplating tank apparatus for electroplating solar cells as described in claim 5, characterized in that: A mounting hole (806) is provided on the end face of a single slider (802) for mounting in conjunction with the corresponding roller (801).

9. The electroplating tank apparatus for electroplating solar cells as described in claim 1, characterized in that: The dropper assembly includes several droppers (9). The structure of a single dropper (9) is as follows: it includes a tube body, and mounting blocks (903) are respectively installed at both ends of the tube body. The tube body is installed in conjunction with the tank body (1) through the mounting blocks (903). The tube body includes several hollow tube body segments (901). Adjacent tube body segments (901) are connected by connecting blocks (902). A liquid inlet connector (905) is provided on the side wall of a single tube body segment (901). A liquid inlet hole (906) is opened in the middle of the liquid inlet connector (905). The liquid inlet hole (906) is connected to the internal space of the corresponding tube body segment (901). Several drip holes (904) are also opened on the side wall of a single tube body segment (901) at uniform intervals along the length direction. The liquid supply system injects medicine into the corresponding tube segment (901) through the liquid inlet connector (905), and the medicine in a single tube segment (901) drips evenly through the drip hole (904).

10. The electroplating tank apparatus for solar cell electroplating as described in claim 1, characterized in that: An array of return holes is provided on the bottom wall of the tank (1). The return hole array is used for the return of the medicine. Each return hole array includes several return holes arranged at intervals along the width direction of the tank (1). A water baffle ring (7) is installed on each return hole.

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