Battery piece broken grid repairing equipment

Abstract

The utility model discloses a kind of battery piece broken grid repair equipment, including the identification device for identifying the broken grid position on battery piece, for the broken grid position on battery piece electroplating grid line to repair broken grid electroplating device and the control device of communication connection the identification device and the electroplating device, control device can according to the broken grid position information received from the identification device, control electroplating device to the broken grid position on battery piece electroplating.This battery piece broken grid repair equipment can be repaired for broken grid position, accurate repair is realized, only to broken grid position and surrounding smaller area produce influence, will not produce influence to whole battery piece.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic cell technology, specifically to a device for repairing broken grids in solar cells. Background Technology

[0002] During the production of photovoltaic cells (referred to as cells), a small number of defective cells are produced. These defective cells typically have flaws such as broken grids, poor soldering, over-soldering, leakage, and blackening of edges and corners.

[0003] Among these issues, grid breakage refers to the phenomenon where the grid lines on a solar cell are broken or interrupted, leading to poor current collection and affecting the cell's photoelectric conversion efficiency. Therefore, it is necessary to repair grid breakage to restore the photoelectric conversion efficiency of the repaired cell and reduce the defect rate during the cell production process.

[0004] Existing methods for repairing broken grids in solar cells generally involve reprinting using screen printing equipment. There is no dedicated equipment for repairing broken grids in solar cells. The repair only targets the broken grid location or the broken grid location and surrounding area, without affecting the grid lines in other areas of the solar cell. Utility Model Content

[0005] The purpose of this invention is to provide a battery cell grid breakage repair device to solve one of the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solutions provided in this utility model embodiment are as follows.

[0007] An embodiment of this utility model provides a battery cell grid breakage repair device, comprising:

[0008] An identification device for identifying the location of broken grids on solar cells;

[0009] An electroplating apparatus for electroplating grid lines at the broken grid locations on solar cells to repair the broken grids;

[0010] The control device is communicatively connected to the identification device and the electroplating device. Based on the broken grid location information received from the identification device, the control device controls the electroplating device to electroplat the broken grid location on the battery cell.

[0011] In some embodiments, the electroplating apparatus includes:

[0012] An electroplating tank, used to hold electroplating solution;

[0013] Anode components, used as the anode in electroplating;

[0014] The spraying mechanism is used to spray electroplating solution onto the broken grid locations on the battery cells;

[0015] During electroplating, the battery cell is conveyed above the electroplating tank and electrically connected to the negative terminal of the power supply. The broken grid position on the battery cell is aligned with the anode, and the anode is electrically connected to the positive terminal of the power supply. The spraying mechanism sprays electroplating liquid onto the broken grid position on the battery cell, so that the anode and the broken grid position on the battery cell are connected through the electroplating liquid.

[0016] In some embodiments, both the anode and the spraying mechanism are located in the electroplating tank, with the anode located directly below the spraying mechanism. During electroplating, the electroplating solution in the electroplating tank covers the anode and the spraying mechanism, and the spraying mechanism sprays the electroplating solution from the electroplating solution in the electroplating tank onto the broken grid position on the battery cell.

[0017] In some embodiments, both the anode and the spraying mechanism are located in the electroplating tank, with the anode positioned directly above the spraying mechanism and having a liquid passage hole on it. During electroplating, the spraying mechanism sprays electroplating solution through the liquid passage hole onto the broken grid location on the battery cell.

[0018] Alternatively, both the anode and the spraying mechanism are located above the electroplating tank, with the anode located directly below the spraying mechanism. The anode is provided with a liquid passage hole. During electroplating, the spraying mechanism sprays electroplating solution onto the broken grid position on the battery cell through the liquid passage hole.

[0019] In some embodiments, the spraying mechanism includes a nozzle and a fixing member, with a plurality of the nozzles disposed on the fixing member;

[0020] During electroplating, the battery cell is divided into multiple identifiable areas, such that each identifiable area corresponds to at least one nozzle; when there is a broken grid in one or more identifiable areas, the corresponding nozzle sprays electroplating liquid onto the one or more identifiable areas.

[0021] In some embodiments, the nozzle has an on state and a off state; when a broken grid exists in one or more of the identifiable areas, the nozzle corresponding to the one or more identifiable areas is in the on state to spray electroplating liquid onto the one or more identifiable areas, while the other nozzles are in the off state.

[0022] In some embodiments, the height of the nozzle can be adjusted; when there is a broken grid in one or more of the identifiable areas, the nozzle corresponding to the one or more identifiable areas moves closer to the one or more identifiable areas, so that the electroplating liquid sprayed by the nozzle corresponding to the one or more identifiable areas can reach the one or more identifiable areas.

[0023] In some embodiments, the spraying mechanism further includes a lifting drive device, which is mounted on the fixing member and has its drive end connected to the nozzle to drive the nozzle to move up and down.

[0024] In some embodiments, the electroplating tank includes a main tank and auxiliary tanks disposed on one or both sides of the main tank. Transfer rollers are disposed near the opening of both the main tank and the auxiliary tank. The transfer rollers near the opening of the auxiliary tanks are conductive transfer rollers, and the transfer rollers near the opening of the main tank are insulating transfer rollers. The conductive transfer rollers are electrically connected to the negative terminal of the power supply, and the conductive transfer rollers are in contact with the conductive areas on the battery cells to achieve electrical connection of the battery cells to the negative terminal of the power supply.

[0025] In some embodiments, the electroplating apparatus includes an electroplating pen and a three-coordinate robot arm connected to the electroplating pen. The three-coordinate robot arm can drive the electroplating pen to move to the broken grid position, so that the electroplating pen can electroplat the grid lines at the broken grid position.

[0026] Due to the application of the above technical solution, the embodiments of this utility model have the following advantages compared with the prior art:

[0027] The solar cell grid breakage repair equipment includes an electroplating device that can repair the broken grid location precisely. It only affects the broken grid location and a small surrounding area, without affecting the entire solar cell. Attached Figure Description

[0028] Appendix Figure 1 This is a schematic diagram of the battery cell partitioning in Embodiment 1 of this utility model;

[0029] Appendix Figure 2 This is a schematic diagram of the battery cell grid breakage repair device in the non-working state in Embodiment 1 of this utility model;

[0030] Appendix Figure 3 This is a schematic diagram of the working state of the battery cell grid breakage repair device in Embodiment 1 of this utility model;

[0031] Appendix Figure 4 This is a circuit connection diagram of the battery cell grid breakage repair device in Embodiment 1 of this utility model;

[0032] Appendix Figure 5 This is a schematic diagram of the structure of a liquid spraying mechanism in Embodiment 1 of this utility model;

[0033] Appendix Figure 6 This is a schematic diagram of the electroplating apparatus in Embodiment 2 of this utility model;

[0034] Appendix Figure 7This is a schematic diagram of the electroplating apparatus in Embodiment 3 of this utility model;

[0035] The meanings of the reference numerals in the attached figures are as follows:

[0036] 10-Battery cell, 101-Identifiable area, 102-Grid line, 102a-Broken grid groove, 103-Plating, 1031-Repair plating, 1032-Additional plating, 1-Electroplating tank, 11-Main tank, 12-Secondary tank, 2-Transfer roller, 21-Conductive transfer roller, 22-Insulating transfer roller, 3-Anode component, 31-Shielding component, 4-Spraying mechanism, 41-Spray nozzle, 42-Fixing component, 51-Support arm, 52-Horizontal drive motor, 53-Vertical drive motor, 54-Lifting drive motor, 55-Electroplating pen. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding of the present invention, but does not constitute a limitation thereof. Embodiment 1 is not a single embodiment, but a collection of embodiments with similar schemes or features, as are other embodiments.

[0038] Example 1

[0039] To address the lack of dedicated equipment for repairing broken grids in existing solar cells, and considering that using existing screen printing equipment for overall repair of solar cells with broken grids is difficult due to the high technical difficulty of miniaturizing screen printing equipment, it is hard to repair only the broken grid location or the broken grid location and surrounding area; therefore, it is necessary to propose a dedicated solar cell broken grid repair equipment.

[0040] Specifically, such as Figure 2-5 As shown, a battery cell grid breakage repair device includes an identification device for identifying the location of the broken grid on the battery cell 10, an electroplating device for electroplating grid lines at the location of the broken grid on the battery cell 10 to repair the broken grid, and a control device that communicates with the identification device and the electroplating device. The control device can control the electroplating device to electroplat the broken grid location on the battery cell 10 according to the broken grid location information received from the identification device.

[0041] The electroplating apparatus can perform electroplating within a small area. For example, by controlling the position and size of the anode in the electroplating apparatus, based on the location and area of ​​the broken grid on the solar cell 10, the anode directly opposite the solar cell 10 is designed so that only the broken grid location and surrounding local area are exposed, while other areas of the anode are blocked. This results in only the broken grid location and surrounding local area being electroplated, meaning the grid lines at the broken grid location are repaired, and the grid lines in the local area surrounding the broken grid location are electroplated to form an additional coating layer. This setup only affects the grid lines in the local area surrounding the broken grid location and does not affect the grid lines on the entire solar cell 10. Another example is controlling the connectivity of the electroplating solution so that the electroplating solution only connects the broken grid location and surrounding local area of ​​the solar cell 10 to the anode, thus ensuring that only the broken grid location and surrounding local area are electroplated.

[0042] The identification device can be an electroluminescent detection device or a photoluminescent detection device. The control device can be an industrial computer.

[0043] In this embodiment, the battery cell grid breakage repair equipment includes an electroplating device, which can repair the grid breakage location, achieving precise repair. It only affects the grid breakage location and a small surrounding area, without affecting the entire battery cell 10.

[0044] In some embodiments, the electroplating apparatus includes an electroplating tank 1 for containing electroplating solution, an anode element 3 serving as the anode for electroplating, and a spraying mechanism 4 for spraying electroplating solution onto the broken grid positions on the battery cell 10. During electroplating, the battery cell 10 is conveyed above the electroplating tank 1 and electrically connected to the negative terminal of a power supply. The broken grid positions on the battery cell 10 are aligned with the anode element 3, and the anode element 3 is electrically connected to the positive terminal of a power supply. The spraying mechanism 4 sprays electroplating solution onto the broken grid positions on the battery cell 10, so that the anode element 3 and the broken grid positions on the battery cell 10 are connected through the electroplating solution. This allows only the broken grid positions and surrounding localized areas to be electroplated, without affecting the grid lines on the entire battery cell 10.

[0045] In some embodiments, the anode 3 and the spraying mechanism 4 are both located in the electroplating tank 1, with the anode 3 located directly below the spraying mechanism 4. During electroplating, the electroplating solution in the electroplating tank 1 covers the anode 3 and the spraying mechanism 4, and the spraying mechanism 4 sprays the electroplating solution from the electroplating solution in the electroplating tank 1 onto the broken grid position on the battery cell 10.

[0046] In some embodiments, the anode 3 and the spraying mechanism 4 are both located in the electroplating tank 1, with the anode 3 located directly above the spraying mechanism 4 and having a liquid passage hole on it. During electroplating, the spraying mechanism 4 sprays electroplating solution through the liquid passage hole onto the broken grid position on the battery cell 10.

[0047] In some embodiments, the anode 3 and the spraying mechanism 4 are both located above the electroplating tank 1, the anode 3 is located directly below the spraying mechanism 4, and the anode 3 is provided with a liquid passage hole; during electroplating, the spraying mechanism 4 sprays electroplating liquid through the liquid passage hole onto the broken grid position on the battery cell 10.

[0048] In some embodiments, the battery cell 10 is divided into multiple identifiable regions 101, see [link to relevant documentation]. Figure 1 The spraying mechanism 4 includes a nozzle 41 and a fixing member 42, with multiple nozzles 41 disposed on the fixing member 42. During electroplating, each identifiable region 101 corresponds to at least one nozzle 41; when one or more identifiable regions 101 have a broken grid, the corresponding nozzle 41 sprays electroplating liquid onto that region 101. The electroplating device only electroplats the identifiable regions 101 with broken grids, repairing the broken grid in that region. Other grid lines in that region are electroplated to form an additional coating layer, but other identifiable regions 101 without broken grids are not electroplated. This scheme controls the impact of grid line repair within the identifiable regions 101 with broken grids, reducing the impact on the grid lines on the entire battery cell 10. For example, if the battery cell 10 is divided into 8 identifiable regions 101, and one identifiable region 101 has a broken grid, the electroplating device only electroplats that one identifiable region 101, while the other identifiable regions 101 are unaffected.

[0049] In some embodiments, the nozzle 41 has an on state and a off state; when there is a broken grid in one or more of the identifiable areas 101, the nozzle 41 corresponding to the one or more identifiable areas 101 is in the on state to spray electroplating solution onto the one or more identifiable areas 101, while the other nozzles 41 are in the off state. For example, the battery cell 10 is divided into 8 identifiable areas 101, of which 2 identifiable areas 101 have broken grids. The nozzles 41 corresponding to these 2 identifiable areas 101 are both in the on state to spray electroplating solution onto these 2 identifiable areas 101, while the nozzles 41 corresponding to the other identifiable areas 101 are all in the off state, so that the electroplating device only electroplats the 2 identifiable areas 101, and the other identifiable areas 101 are unaffected.

[0050] In some embodiments, the height of the nozzle 41 is adjustable; when there is a broken grid in one or more of the identifiable areas 101, the nozzle 41 corresponding to the one or more identifiable areas 101 moves closer to the one or more identifiable areas 101, so that the electroplating liquid sprayed by the nozzle corresponding to the one or more identifiable areas 101 can reach the one or more identifiable areas 101.

[0051] In some implementations, such as Figure 5 As shown, the spraying mechanism 4 also includes a lifting drive device 43, which is mounted on the fixing member 42. The driving end of the lifting drive device 43 is connected to the spray head 41 to drive the spray head 41 to move up and down. Specifically, the lifting drive device 43 can be a cylinder or a linear motor. Specifically, as... Figures 2-4 As shown, the fixing member 42 is disposed in the electroplating tank 1, and the end of the fixing member 42 is fixedly connected to the inner wall of the electroplating tank 1.

[0052] During electroplating, when the spraying mechanism 4 is above the battery cell 10, the nozzle 41 descends to approach the identifiable area 101; when the spraying mechanism 4 is below the battery cell 10, the nozzle 41 rises to approach the identifiable area 101.

[0053] In some embodiments, the electroplating tank 1 includes a main tank 11 and secondary tanks 12 disposed on one or both sides of the main tank 11. Transfer rollers 2 are disposed near the opening of the main tank 11 and near the opening of the secondary tank 12. The transfer roller 2 near the opening of the secondary tank 12 is a conductive transfer roller 21, and the transfer roller 2 near the opening of the main tank 11 is an insulating transfer roller 22. The conductive transfer roller 21 is electrically connected to the negative terminal of the power supply, and the conductive transfer roller 21 contacts and connects to the conductive area on the battery cell 10 to realize that the battery cell 10 is electrically connected to the negative terminal of the power supply.

[0054] During the electroplating process, the main tank 11 contains electroplating solution. The transfer roller 2 near the opening of the main tank 11 may become contaminated with the electroplating solution, causing a portion of the battery cell 10 in contact with the transfer roller 2 to be electroplated. To avoid this, the transfer roller 2 near the opening of the main tank 11 is configured as an insulating transfer roller 22. The secondary tank 12 may or may not contain electroplating solution. When electroplating solution is present, the level of the electroplating solution in the secondary tank 12 is lower than that in the main tank 11, making it difficult or impossible for the transfer roller 2 near the opening of the secondary tank 12 to come into contact with the electroplating solution. Therefore, the transfer roller 2 near the opening of the secondary tank 12 is configured as a conductive transfer roller 21. The technical solution in this embodiment facilitates electroplating repair of the broken grid location of the battery cell 10 and reduces the risk of electroplating other areas of the battery cell 10.

[0055] Example 2

[0056] Improvements were made based on Example 1, such as... Figure 6As shown, the electroplating apparatus includes a plurality of main tanks 11 arranged sequentially, with a secondary tank 12 disposed between two adjacent main tanks 11. Preferably, a secondary tank 12 is disposed on both sides of each main tank 11, and a conductive transfer roller 21 is disposed near the opening of each secondary tank 12. When one of the conductive transfer rollers 21 has poor contact with the battery cell 10, the other conductive transfer roller 21 can be used to conduct electricity to the battery cell 10, thereby improving the reliability of the electrical connection between the negative terminal of the power supply and the battery cell 10.

[0057] Specifically, the same broken grid location on the solar cell 10 is sequentially electroplated in multiple main tanks 11 to ultimately repair the broken grid. Each main tank 11 only repairs a certain height (or thickness) of the grid line. This allows for simultaneous repair of broken grids on multiple solar cells 10, increasing the production capacity of the solar cell grid repair equipment. Furthermore, to ensure both uniformity and efficiency in grid line electroplating, the electroplating process is divided into several stages, each with different electroplating parameters. Using only one main tank 11 for a single electroplating operation may lead to plating peeling, low electroplating efficiency, or poor uniformity. Therefore, using multiple main tanks 11 with different electroplating parameters to sequentially electroplat the same broken grid location to ultimately repair the broken grid can alleviate problems such as plating peeling, low electroplating efficiency, or poor uniformity.

[0058] Example 3

[0059] Based on Embodiment 1, an improvement is made to the electroplating device, which includes an electroplating pen 55 and a three-coordinate robotic arm. The three-coordinate robotic arm is connected to the electroplating pen 55 and can drive the electroplating pen 55 to move to the broken grid position, thereby electroplating the grid lines at the broken grid position. For example, the three-coordinate robotic arm includes a horizontal drive motor 52 connected to a support arm 51, a vertical drive motor 53 connected to the drive end of the horizontal drive motor 52, and a lifting drive motor 54 connected to the drive end of the vertical drive motor 53. The electroplating pen 55 is mounted on the drive end of the lifting drive motor 54. Under the action of the horizontal drive motor 52, the vertical drive motor 53, and the lifting drive motor 54, the electroplating pen 55 performs horizontal, vertical, and lifting movements, respectively. Under the action of the above three drive motors, the electroplating pen 55 can accurately move to the broken grid position and electroplat the repair grid lines at the broken grid position. The technical solution of this embodiment can further reduce the electroplating area, controlling the electroplating range to a small area around the broken grid position, without affecting the entire battery cell 10.

[0060] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A battery cell grid breakage repair device, characterized in that, include: An identification device for identifying the location of broken grids on solar cells; An electroplating apparatus for electroplating grid lines at the broken grid locations on the battery cell to repair the broken grid; A control device is communicatively connected to the identification device and the electroplating device. Based on the broken grid location information received from the identification device, the control device controls the electroplating device to electroplat the broken grid location on the battery cell.

2. The battery cell grid breakage repair equipment according to claim 1, characterized in that, The electroplating apparatus includes: An electroplating tank, used to hold electroplating solution; Anode components, used as the anode in electroplating; A spraying mechanism is used to spray electroplating solution onto the broken grid locations on the battery cell; During electroplating, the battery cell is conveyed above the electroplating tank and electrically connected to the negative terminal of the power supply. The broken grid position on the battery cell is aligned with the anode, and the anode is electrically connected to the positive terminal of the power supply. The spraying mechanism sprays electroplating liquid onto the broken grid position on the battery cell, so that the anode and the broken grid position on the battery cell are connected through the electroplating liquid.

3. The battery cell grid breakage repair equipment according to claim 2, characterized in that, Both the anode and the spraying mechanism are located in the electroplating tank, with the anode located directly below the spraying mechanism. During electroplating, the electroplating solution in the electroplating tank covers the anode and the spraying mechanism, and the spraying mechanism sprays the electroplating solution from the electroplating solution in the electroplating tank onto the broken grid position on the battery cell.

4. The battery cell grid breakage repair equipment according to claim 2, characterized in that, Both the anode and the spraying mechanism are located in the electroplating tank. The anode is located directly above the spraying mechanism and has a liquid passage hole. During electroplating, the spraying mechanism sprays electroplating solution through the liquid passage hole onto the broken grid position on the battery cell. And / or, the anode and the spraying mechanism are both located above the electroplating tank, the anode is located directly below the spraying mechanism, and the anode is provided with a liquid passage hole; during electroplating, the spraying mechanism sprays electroplating solution through the liquid passage hole to the broken grid position on the battery cell.

5. The battery cell grid breakage repair equipment according to claim 2, characterized in that, The spraying mechanism includes a nozzle and a fixing member, and a plurality of the nozzles are disposed on the fixing member; During electroplating, the battery cell is divided into multiple identifiable areas, such that each identifiable area corresponds to at least one nozzle; when there is a broken grid in one or more identifiable areas, the corresponding nozzle sprays electroplating liquid onto the one or more identifiable areas.

6. The battery cell grid breakage repair equipment according to claim 5, characterized in that, The nozzle has an on state and a off state; when there is a broken grid in one or more of the identifiable areas, the nozzle corresponding to the one or more identifiable areas is in the on state to spray electroplating liquid onto the one or more identifiable areas, while the other nozzles are in the off state.

7. The battery cell grid breakage repair equipment according to claim 5, characterized in that, The height of the nozzle can be raised or lowered; when there is a broken grid in one or more of the identifiable areas, the nozzle corresponding to the one or more identifiable areas moves closer to the one or more identifiable areas, so that the electroplating liquid sprayed by the nozzle corresponding to the one or more identifiable areas can reach the one or more identifiable areas.

8. The battery cell grid breakage repair equipment according to claim 7, characterized in that, The spraying mechanism also includes a lifting drive device, which is mounted on the fixed member. The drive end of the lifting drive device is connected to the nozzle to drive the nozzle to move up and down.

9. The battery cell grid breakage repair equipment according to claim 2, characterized in that, The electroplating tank includes a main tank and auxiliary tanks disposed on one or both sides of the main tank. Transfer rollers are disposed near the opening of both the main tank and the auxiliary tank. The transfer rollers near the opening of the auxiliary tanks are conductive transfer rollers, and the transfer rollers near the opening of the main tanks are insulating transfer rollers. The conductive transfer rollers are electrically connected to the negative terminal of the power supply, and the conductive transfer rollers are in contact with the conductive areas on the battery cells to achieve electrical connection of the battery cells to the negative terminal of the power supply.

10. The battery cell grid breakage repair equipment according to claim 1, characterized in that, The electroplating device includes an electroplating pen and a three-coordinate robot arm. The three-coordinate robot arm is connected to the electroplating pen and can drive the electroplating pen to the broken grid position, so that the electroplating pen can electroplat the grid line at the broken grid position.

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