Photovoltaic cell electroplating device

Abstract

The utility model belongs to the technical field of electroplating, and discloses a photovoltaic cell electroplating device, which comprises a carrier, a cathode piece, a spraying disc, a porous anode plate, a plurality of first rollers and an adsorption piece, the cathode piece is separably stacked on the battery piece; the spraying disc is provided with an inner cavity and a backflow channel, a plurality of spraying holes and a plurality of backflow holes are formed in the top of the spraying disc, a liquid inlet and a recovery opening are further formed in the surface of the spraying disc, the inner cavity receives liquid medicine through the liquid inlet and sprays the liquid medicine upwards through the spraying holes, and the backflow channel receives the liquid medicine through the backflow holes and discharges the liquid medicine through the recovery opening; the porous anode plate is stacked on the top of the spraying disc; the plurality of first rollers are arranged above the porous anode plate in a spaced, parallel and rotating manner along the transportation direction of the battery pieces; the adsorption parts are stacked on the porous anode plate, are positioned between the adjacent first rollers and are used for adsorbing liquid medicine; when the first roller transports the battery piece, the upper surface and the lower surface of the battery piece are in contact with the cathode piece and the adsorption piece respectively.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroplating technical field especially relates to a photovoltaic cell electroplating device. BACKGROUND

[0002] In the production of photovoltaic cells, the grid lines on the surface of silicon cell pieces are usually made by electrochemical deposition of copper. The current electrochemical deposition of copper is mainly divided into horizontal electroplating and vertical electroplating. Horizontal electroplating is widely used because it makes the grid lines of the cell pieces have better integrity. However, in the process of horizontal electroplating, the electroplating surface of the cell pieces is usually immersed in the electrolyte for electroplating. On the one hand, the electrolyte can easily contact the cathode surface of the silicon piece, causing electrolysis of the metal on the non-electroplating surface or causing copper plating on the cathode piece. On the other hand, the electrolyte has liquid level fluctuations, causing unstable electroplating process, and the relative movement of the cell pieces and the cathode piece causes the position of the cathode surface to change constantly, affecting the uniformity of electroplating and the quality of the products. In addition, the process stability and uniformity of electroplating are poor, which restricts the movement speed of the cell pieces, thereby prolonging the production cycle of the production line and leading to low production efficiency and capacity.

[0003] Therefore, there is an urgent need to provide a photovoltaic cell electroplating device to solve the above problems. SUMMARY

[0004] The utility model aims at providing a photovoltaic cell electroplating device to improve the stability and uniformity of the electroplating process, optimize the surface quality of the plating layer, improve the quality of the photovoltaic cell products, shorten the production cycle, and improve the production efficiency and capacity.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A photovoltaic cell electroplating device comprises:

[0007] A carrier is provided with a through accommodating groove for accommodating cell pieces.

[0008] A cathode piece is detachably stacked on the cell pieces.

[0009] A spray disc has an inner cavity and a backflow channel. The top of the spray disc is provided with a plurality of spray holes and a plurality of backflow holes. The surface of the spray disc is also provided with a liquid inlet and a recovery port. The spray holes and the liquid inlet are in communication with the inner cavity, and the backflow holes and the recovery port are in communication with the backflow channel.

[0010] A porous anode plate is stacked on the top of the spray disc.

[0011] A plurality of first rollers are arranged above the porous anode plate in parallel and rotationally in the conveying direction of the battery sheet, for conveying the battery sheet;

[0012] A suction accessory is arranged on the porous anode plate and between the adjacent first rollers, for adsorbing the electrolyte solution; when the first rollers convey the battery sheet, the lower surface of the battery sheet is in contact with the suction accessory, and the upper surface is in contact with the cathode member.

[0013] Further, the plurality of first rollers are uniformly spaced, and the distance between the axes of the adjacent first rollers is 1 / 3 to 1 / 2 of the length of the battery sheet.

[0014] Further, the surface of the first roller is coated with an adsorption layer.

[0015] Further, the injection holes and the return holes are arranged in an array.

[0016] Further, the return holes have a larger diameter than the injection holes.

[0017] Further, the liquid inlet is arranged on any side wall of the spray disc, and the recovery port is arranged at the bottom of the spray disc.

[0018] Further, the cathode member is a cathode brush, and the cathode brush can cover the battery sheet.

[0019] Further, the photovoltaic cell plating device further comprises a cathode transfer mechanism, the output end of the cathode transfer mechanism is in transmission connection with the cathode member, for transferring the cathode member from the unloading area to the loading area, and driving the cathode member to approach or move away from the battery sheet in the vertical direction.

[0020] Further, the photovoltaic cell plating device further comprises a loading mechanism, the loading mechanism comprises a driving assembly, a suction disc and a negative pressure source, the suction disc is in communication with the negative pressure source, for sucking the battery sheet, and the driving assembly is used for driving the suction disc to transfer the battery sheet into the containing groove.

[0021] Further, the photovoltaic cell plating device further comprises a conveying mechanism, the conveying mechanism comprises a plurality of second rollers arranged above the loading area in parallel and rotationally in the conveying direction of the battery sheet, the second rollers are used for conveying the battery sheet contained in the containing groove to the first rollers.

[0022] The photovoltaic cell plating device has the following beneficial effects:

[0023] The utility model provides a photovoltaic cell electroplating device, including carrier, cathode piece, spray disc, porous anode plate, a plurality of first cylinder and suction accessory, the carrier is provided with the containing groove that penetrates, is used for containing the cell piece, the cathode piece can be separatedly stacked on the cell piece, the spray disc has the inner chamber and the reflux channel, the spray disc top is provided with a plurality of spray orifices and a plurality of reflux holes, the spray disc surface is also provided with liquid inlet and recovery mouth, the spray orifice and liquid inlet all are connected with the inner chamber, the reflux hole and recovery mouth all are connected with the reflux channel, the inner chamber receives the liquid medicine through liquid inlet, and sprays upwards through the spray orifice, the reflux channel receives the liquid medicine through the reflux hole, and discharges through recovery mouth, the porous anode plate is stacked in the spray disc top, a plurality of first cylinder is parallel and rotates and is arranged above the porous anode plate along the transport direction of cell piece, is used for transporting the cell piece, the suction accessory is stacked on the porous anode plate, and is located between the adjacent first cylinder, is used for adsorbing the liquid medicine, when the first cylinder transports the cell piece, the lower surface of cell piece is in contact with the suction accessory, and the upper surface is in contact with the cathode piece. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of photovoltaic cell electroplating device feeding state of the utility model,

[0025] Figure 2It is the structure schematic view of the electroplating state of the photovoltaic cell electroplating device of the utility model;

[0026] Figure 3 It is the structure schematic view of the carrier of the utility model;

[0027] Figure 4 It is the structure schematic view of the spray disc of the utility model.

[0028] In the drawing,

[0029] 100, battery piece;

[0030] 1, carrier; 11, containing groove;

[0031] 2, cathode piece;

[0032] 3, spray disc; 31, inner cavity; 32, backflow channel; 33, spray hole; 34, backflow hole; 35, liquid inlet; 36, recovery port;

[0033] 4, porous anode plate; 5, first roller; 6, suction accessory; 7, second roller. DETAILED DESCRIPTION

[0034] The utility model will be further explained in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all the structures.

[0035] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; It can be mechanical connection, or electrical connection; It can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0038] As shown in Figures 1-4 The present embodiment provides a photovoltaic cell electroplating device, which comprises a carrier 1, a cathode piece 2, a spray disc 3, a porous anode plate 4, a plurality of first rollers 5 and a suction accessory 6. The carrier 1 is provided with a through accommodating groove 11 for accommodating a cell piece 100. The cathode piece 2 is detachably stacked on the cell piece 100. The spray disc 3 has an inner cavity 31 and a backflow channel 32. The top of the spray disc 3 is provided with a plurality of spray holes 33 and a plurality of backflow holes 34. The surface of the spray disc 3 is also provided with a liquid inlet 35 and a recovery port 36. The spray holes 33 and the liquid inlet 35 are in communication with the inner cavity 31. The backflow holes 34 and the recovery port 36 are in communication with the backflow channel 32. The inner cavity 31 receives liquid medicine through the liquid inlet 35 and sprays it upward through the spray holes 33. The backflow channel 32 receives liquid medicine through the backflow holes 34 and discharges it through the recovery port 36. The porous anode plate 4 is stacked on the top of the spray disc 3. The plurality of first rollers 5 are arranged above the porous anode plate 4 in a spaced, parallel and rotating manner along the transport direction of the cell piece 100, for transporting the cell piece 100. The suction accessory 6 is stacked on the porous anode plate 4 and located between adjacent first rollers 5, for adsorbing liquid medicine. When the first roller 5 transports the cell piece 100, the lower surface of the cell piece 100 is in contact with the suction accessory 6, and the upper surface is in contact with the cathode piece 2.

[0039] In production, the cathode part 2 is stacked on the battery sheet 100, tightly adheres to the battery sheet 100 and is relatively static, the liquid medicine is input to the inner cavity 31 of the spray disc 3 through the liquid inlet 35, the liquid medicine is sprayed out of the spray hole 33, infiltrates the suction accessory 6 after passing through the porous anode plate 4, and forms a uniform liquid film on the surface of the suction accessory 6. In this process, the lower surface of the battery sheet 100 is in full contact with the liquid medicine under the action of the liquid surface tension and the spray liquid column pressure, and is electrically connected with the porous anode plate 4 through the liquid medicine. At the same time, the cathode part 2 tightly adheres to the upper surface of the battery sheet 100 and is relatively static with the battery sheet 100, so that the plated surface of the battery sheet 100 is stable, so that the cathode part 2 can output a specific current pattern according to the electroplating requirement, implement a variable current control process, and thus flexibly meet diversified electroplating production requirements and effectively optimize the surface quality of the plated layer. The liquid medicine in the suction accessory 6 passes through the porous anode plate 4 under the action of gravity, flows into the reflux channel 32 through the reflux hole 34, and is recovered from the recovery port 36, so as to realize efficient replacement of new and old liquid medicines, ensure that the ion concentration of the liquid medicine always meets the electroplating requirement and remains stable, and provide a strong guarantee for high-quality electroplating. The plurality of first rollers 5 transport the battery sheet 100 along a predetermined path, and when the battery sheet 100 moves on the surface of the suction accessory 6, the plated surface of the battery sheet 100 can form a stable and uniform liquid film due to the buffering and adsorbing effects of the suction accessory 6 and the surface tension therebetween, the liquid level fluctuation of the plated surface is negligible, the stability of the electroplating process is greatly improved, and the liquid medicine is effectively prevented from overflowing to the non-electroplated surface of the battery sheet 100, so as to improve the surface quality of the battery sheet 100. In addition, the battery sheet 100 is arranged in the through accommodating groove 11 of the carrier 1, the carrier 1 not only further prevents the liquid medicine from contacting the non-electroplated surface of the battery sheet 100, but also limits the battery sheet 100, thereby significantly enhancing the stability of the battery sheet 100 and being beneficial to improving the transportation line speed of the battery sheet 100, thereby greatly shortening the process time and production cycle, improving the production efficiency, and significantly increasing the production capacity.

[0040] In the embodiment, the plurality of first rollers 5 are uniformly and spacedly distributed, and the distance between the axes of adjacent first rollers 5 is 1 / 3-1 / 2 of the length of the battery sheet 100. On the one hand, the stable support can be provided for the battery sheet 100, the transportation of the battery sheet 100 is stable, and the processing efficiency and product quality are improved. On the other hand, the suction accessories 6 are arranged at intervals between adjacent two battery sheets 100, so that the contact area of the suction accessory 6 and the battery sheet 100 is ensured, the contact area of the battery sheet 100 and the liquid film is ensured, the electroplating effect is ensured, and the electroplating efficiency is improved.

[0041] In an optional embodiment, the surface of the first roller 5 is coated with an adsorption layer, the adsorption layer can adsorb the liquid medicine, and the uniformity and integrity of the liquid film on the plated surface of the battery sheet 100 are ensured. In addition, the adsorption layer can increase the acting force between the first roller 5 and the battery sheet 100, thereby improving the transportation stability and transportation speed.

[0042] The porous high polymer material is used for the adsorption layer coated on the surface of the suction accessory 6 and / or the first roller 5, and the porous structure of the porous high polymer material can fully absorb the plating solution sprayed by the spraying disc 3 and can fully contact the plated surface of the battery sheet 100, so that the strong electric lines generated by the close distance between the porous anode plate 4 and the cathode piece 2 are effectively weakened, the electric field is mildly applied to the plated surface of the battery sheet 100, and the uniformity of electroplating is improved. Due to the blocking effect and the porous structure of the porous high polymer material, the electroplating uneven phenomenon caused by the edge discharge effect can be effectively avoided, the porous anode plate 4 and the cathode piece 2 can be arranged in close proximity, and the uniformity of the overall electroplating is further ensured. Optionally, the porous high polymer material can be foamed polypropylene, foamed polyvinyl chloride, foamed polyvinyl alcohol and other porous structure materials that can be chemically resistant to the plating solution.

[0043] As shown in Figure 4 The spraying holes 33 and the backflow holes 34 are arranged in an array and staggered, which can ensure the uniformity and timeliness of the plating solution spraying and backflow, ensure the timely replacement of new and old plating solution, and be beneficial to improving the stability and balance of the ion concentration of the plating solution liquid film, thereby improving the electroplating quality.

[0044] Further, the pore diameter of the backflow hole 34 is larger than the pore diameter of the spraying hole 33, so as to improve the plating solution backflow efficiency and maintain the stability of the ion concentration of the plating solution liquid film.

[0045] As shown in Figure 1 The liquid inlet 35 is arranged on any side wall of the spraying disc 3, so that the plating solution enters the inner cavity 31 from the side, promotes the flow and mixing of the plating solution in the cavity, helps the plating solution to be more evenly distributed in the cavity, avoids the local ion concentration being too high or too low, has a buffering effect on the plating solution inlet process, and helps to stabilize the plating solution spraying pressure; and the recovery port 36 is arranged at the bottom of the spraying disc 3, so that the plating solution in the backflow channel 32 can flow out smoothly under the action of gravity, and the plating solution is prevented from depositing in the backflow channel 32.

[0046] In the embodiment, the cathode piece 2 is a cathode brush, and the cathode brush can cover the battery sheet 100, so that the whole non-electroplated surface of the battery sheet 100 can be effectively electrified, and the current / voltage is uniform and stable, so that the current density of the grid line position of the plated surface of the battery sheet 100 is uniform.

[0047] Further, the photovoltaic cell plating device further comprises a cathode transfer mechanism, an output end of the cathode transfer mechanism is in transmission connection with the cathode piece 2, and the cathode transfer mechanism is used for transferring the cathode piece 2 from the unloading area to the loading area and driving the cathode piece 2 to move close to or away from the cell sheet 100 in the vertical direction. In the loading area, after the cell sheet 100 is accommodated in the accommodation groove 11 of the carrier 1, the cathode transfer mechanism drives the cathode piece 2 to move close to the cell sheet 100 downward, so that the cathode piece 2 is tightly attached to the cell sheet 100. In the plating process, the cathode piece 2 moves on the suction member 6 together with the cell sheet 100. After the plating is completed, the cathode transfer mechanism drives the cathode piece 2 to move away from the cell sheet 100 upward and returns to the loading area, so as to realize the efficient utilization of the cathode piece 2 and ensure the production efficiency.

[0048] Optionally, the cathode transfer mechanism includes but is not limited to a truss robot or a mechanical hand, which is not limited herein, and the specific structure thereof belongs to the prior art and will not be described herein.

[0049] Further, the photovoltaic cell plating device further comprises a loading mechanism, the loading mechanism comprises a driving assembly, a suction disc and a negative pressure source, the suction disc is in communication with the negative pressure source and is used for sucking the cell sheet 100, and the driving assembly is used for driving the suction disc to transfer the cell sheet 100 into the accommodation groove 11, so as to realize the stable loading of the cell sheet 100, avoid damaging the cell sheet 100 and improve the product qualification rate.

[0050] In addition, the photovoltaic cell plating device further comprises a conveying mechanism, the conveying mechanism comprises a plurality of second rollers 7 which are arranged in the loading area in a spaced, parallel and rotating manner along the conveying direction of the cell sheet 100, and the second rollers 7 are used for conveying the cell sheet 100 accommodated in the accommodation groove 11 to the first roller 5. The plurality of second rollers 7 provide uniform and stable support and conveying power for the cell sheet 100 accommodated in the accommodation groove 11. Through the cooperation of the second rollers 7 and the first roller 5, the carrier 1 and the cell sheet 100 are smoothly transferred from the loading area to the first roller 5 and the suction member 6 in the plating area, the vibration and impact of the carrier 1 and the cell sheet 100 in the conveying process are reduced, which is beneficial to protecting the integrity of the cell sheet 100, realizing continuous, efficient and stable conveying, improving the working efficiency of the entire photovoltaic cell plating device and meeting the requirement of production efficiency in industrial production.

[0051] It should be noted that the first roller 5 and the second roller 7 of the embodiment need to be driven to rotate by a driving mechanism, so as to realize the horizontal conveying of the cell sheet 100. The type and structure of the driving mechanism are not specially required and limited in the embodiment, and chain transmission, gear transmission and motor driving commonly used in the art can be used in the embodiment.

[0052] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A photovoltaic cell electroplating apparatus, characterized in that, include: The carrier (1) has a through receiving slot (11) for receiving the battery cell (100); The cathode element (2) is detachably stacked on the battery cell (100); The spray disc (3) has an inner cavity (31) and a return channel (32). The top of the spray disc (3) is provided with a plurality of spray holes (33) and a plurality of return holes (34). The surface of the spray disc (3) is also provided with a liquid inlet (35) and a recovery port (36). The spray holes (33) and the liquid inlet (35) are connected to the inner cavity (31), and the return holes (34) and the recovery port (36) are connected to the return channel (32). A porous anode plate (4) is stacked on top of the spray disc (3); Multiple first rollers (5) are arranged at intervals, parallel and rotatably above the porous anode plate (4) along the transport direction of the battery cell (100) for transporting the battery cell (100); The adsorption element (6) is stacked on the porous anode plate (4) and located between adjacent first rollers (5) for adsorbing the drug solution; when the first roller (5) transports the battery cell (100), the lower surface of the battery cell (100) contacts the adsorption element (6) and the upper surface contacts the cathode element (2).

2. The photovoltaic cell electroplating apparatus according to claim 1, characterized in that, Multiple first rollers (5) are evenly spaced, and the distance between the axes of adjacent first rollers (5) is 1 / 3 to 1 / 2 of the length of the battery cell (100).

3. The photovoltaic cell electroplating apparatus according to claim 1, characterized in that, The surface of the first roller (5) is covered with an adsorption layer.

4. The photovoltaic cell electroplating apparatus according to claim 1, characterized in that, The injection holes (33) and the return holes (34) are arranged in an array and staggered.

5. The photovoltaic cell electroplating apparatus according to claim 4, characterized in that, The diameter of the return hole (34) is larger than the diameter of the injection hole (33).

6. The photovoltaic cell electroplating apparatus according to claim 1, characterized in that, The liquid inlet (35) is located on any side wall of the spray disc (3), and the recovery port (36) is located at the bottom of the spray disc (3).

7. The photovoltaic cell electroplating apparatus according to claim 1, characterized in that, The cathode component (2) is a cathode brush, and the cathode brush can cover the battery cell (100).

8. The photovoltaic cell electroplating apparatus according to any one of claims 1 to 7, characterized in that, The photovoltaic cell electroplating device also includes a cathode transfer mechanism. The output end of the cathode transfer mechanism is connected to the cathode component (2) for transmitting the cathode component (2) from the unloading area to the loading area, and for driving the cathode component (2) to move closer to or further away from the cell (100) in the vertical direction.

9. The photovoltaic cell electroplating apparatus according to any one of claims 1 to 7, characterized in that, The photovoltaic cell electroplating device also includes a feeding mechanism, which includes a driving component, a suction cup and a negative pressure source. The suction cup is connected to the negative pressure source and is used to pick up the cell (100). The driving component is used to drive the suction cup to transfer the cell (100) into the receiving groove (11).

10. The photovoltaic cell electroplating apparatus according to claim 9, characterized in that, The photovoltaic cell electroplating device further includes a conveying mechanism, which includes a plurality of second rollers (7) arranged at intervals, parallel and rotatably in the loading area along the transport direction of the cell (100). The second rollers (7) are used to convey the cell (100) contained in the receiving groove (11) to the first roller (5).

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