Battery sheet coating apparatus

Abstract

The application discloses a battery piece coating device. The device comprises a coating workbench, a hollow area matched with the size of the battery piece is arranged on the coating workbench; a battery piece bearing platform matched with the size of the hollow area and capable of being embedded into the hollow area is used for bearing the battery piece; a coating assembly is used for performing the operation of coating the photosensitive glue on the battery piece; a driving assembly is connected with the battery piece bearing platform and used for moving the battery piece bearing platform to a preset coating position of the hollow area to bear the battery piece to be coated and moving the battery piece bearing platform to a discharging position of the battery piece after the coating of the battery piece is completed. The battery piece coating device provided by the application does not need to perform vacuum adsorption on the battery piece during coating, thereby avoiding the problem that the thickness of the photosensitive glue coated on the adsorption position and the non-adsorption position is different due to the vacuum adsorption of the battery piece, and the coating uniformity of the battery piece is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell technology, specifically to a cell coating apparatus. Background Technology

[0002] In solar cell production, photosensitive emulsion coating is a crucial process. Traditionally, screen printing is used to coat the solar cells with this emulsion. Specifically, the screen printing process typically involves placing the solar cell on a coating platform. To ensure the cell remains in place during printing and prevent displacement, vacuum suction is used to firmly adhere the cell to the platform surface. After the cell is secured, a coating head uses a special screen to apply the photosensitive emulsion through a coating head, printing it onto the cell surface according to a pre-defined pattern or evenly, thus completing the coating process.

[0003] However, during vacuum adsorption fixation of solar cells, pits are easily formed on the cell surface near the vacuum adsorption holes. This results in inconsistent photosensitive emulsion thickness between the pitted and non-pitted areas during printing, affecting the photoelectric performance and quality stability of the cells and reducing product yield. Furthermore, this method of screen coating photosensitive emulsion leads to inconsistent wet weight of the photosensitive emulsion on different cells, a problem known as inter-cell wet weight, which can typically vary by about 100mg. Even using the same printing parameters, the actual amount of photosensitive emulsion coated on each cell still varies significantly, negatively impacting the consistency of cell performance, increasing the difficulty of quality control, and hindering subsequent applications. Utility Model Content

[0004] In view of the above problems, this application provides a battery cell coating apparatus to solve the above technical problems.

[0005] This application provides a battery cell coating apparatus, comprising:

[0006] The coating worktable has a cutout area that matches the size of the solar cell.

[0007] A battery cell support platform, which matches the size of the hollowed-out area, can be embedded in the hollowed-out area to support the battery cell;

[0008] A coating assembly for applying photosensitive adhesive to the battery cell;

[0009] A drive component, connected to the battery cell support platform, is used to move the battery cell support platform to a preset coating position in the hollowed-out area to support the battery cell to be coated, and to move the battery cell support platform to the unloading position of the battery cell after the coating of the battery cell is completed.

[0010] In some embodiments, in the battery cell coating apparatus provided in this application, the height of the preset coating position of the hollowed-out area from the upper surface of the coating worktable is the sum of the thickness of the battery cell and the thickness of the photosensitive adhesive to be coated on the battery cell.

[0011] In some embodiments, in the battery cell coating apparatus provided in this application, the battery cell carrying platform is provided with a plurality of vacuum adsorption holes, and a vacuum channel is provided inside the battery cell carrying platform. The vacuum adsorption holes are connected to an external vacuum adsorption mechanism through the vacuum channel, and are used to adsorb the battery cell onto the battery cell carrying platform by vacuum adsorption after the battery cell coating is completed, and to release the battery cell after the driving component moves the battery cell carrying platform to the battery cell unloading position.

[0012] In some embodiments, in the battery cell coating apparatus provided in this application, the driving component is a robotic arm, used to drive the battery cell carrying platform to move along a preset path, so as to move between the preset coating position in the hollow area and the unloading position of the battery cell.

[0013] In some embodiments, in the battery cell coating apparatus provided in this application, the robotic arm is used to drive the battery cell carrying platform to move along a preset first path to move vertically between a preset coating position in the hollowed-out area and the lower surface of the coating worktable, and to drive the battery cell to move along a preset second path to move horizontally between the lower surface of the coating worktable and the unloading position of the battery cell.

[0014] In some embodiments, the battery cell coating apparatus provided in this application includes a glue supply system and a coating nozzle;

[0015] The adhesive supply system is used to supply photosensitive adhesive to the coating head, and the coating nozzle is used to perform the operation of coating the battery cell with photosensitive adhesive.

[0016] In some embodiments, the battery cell coating apparatus provided in this application further includes a feeding assembly and a discharging assembly;

[0017] The feeding assembly is used to pick up the battery cell from a preset feeding position and place the battery cell on the battery cell carrying platform;

[0018] The unloading component is used to pick up the battery cell after the drive component moves the battery cell carrier platform to the unloading position of the battery cell.

[0019] In some embodiments, the solar cell coating apparatus provided in this application refers to a heterojunction solar cell.

[0020] The battery cell coating apparatus provided in this application features a coating worktable with a cutout area matching the size of the battery cell. A battery cell support platform, embedded within this cutout area, supports the battery cell. The coating assembly operates within the cutout area to apply photosensitive emulsion to the battery cell. This battery cell coating apparatus eliminates the need for vacuum adsorption of the battery cell during coating, thus avoiding the problem of uneven photosensitive emulsion thickness between adsorption and non-adsorption locations caused by vacuum adsorption, and improving the coating uniformity of the battery cell.

[0021] These or other aspects of this application will become more apparent in the following description of the embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a battery cell coating apparatus provided in an embodiment of this application is shown.

[0024] Figure 2 A partial view of the battery cell coating apparatus provided in an embodiment of this application is shown.

[0025] Icon labels:

[0026] 10 battery cell; 20 photosensitive adhesive; 100 coating worktable; 110 hollow area; 200 battery cell support platform; 210 vacuum adsorption hole; 300 coating assembly; 310 adhesive supply system; 320 coating nozzle; 400 drive assembly; 500 cleaning assembly; 600 fastener; 610 first support frame; 620 second support frame. Detailed Implementation

[0027] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Furthermore, in the embodiments of this application, "multiple" refers to two or more. Therefore, in the embodiments of this application, "multiple" can also be understood as "at least two". "At least one" can be understood as one or more, such as one, two, or more. For example, including at least one means including one, two, or more, and is not limited to which ones are included. For example, including at least one of A, B, and C, then it could include A, B, C, A and B, A and C, B and C, or A and B and C.

[0030] This application provides a battery cell coating apparatus. Figure 1 A schematic diagram of the battery cell coating apparatus provided in an embodiment of this application is shown, as follows: Figure 1 As shown, the battery cell coating apparatus provided in this application embodiment includes a coating worktable 100, a battery cell support platform 200, a coating assembly 300, and a drive assembly 400.

[0031] The coating worktable 100 has a cutout area 110 that matches the size of the battery cell 10, and the cutout area 110 can be embedded in the battery cell 10. A battery cell support platform 200 is provided corresponding to the cutout area 110 and is embedded in the cutout area 110 to support the battery cell 10. Optionally, the size of the battery cell support platform 200 matches the size of the cutout area 110 so that it can be embedded in the cutout area 110 and support the battery cell 10 within it. The coating assembly 300 is disposed opposite to the coating worktable 100 and is used to perform the photosensitive adhesive coating operation on the battery cell 10 supported by the battery cell support platform 200. Specifically, after the battery cell 10 is placed into the battery cell support platform 200 within the cutout area 110, the coating assembly 300 begins the photosensitive adhesive coating operation on the battery cell 10. The drive assembly 400 is connected to the cell support platform 200 and is used to move the cell support platform 200 to a preset coating position in the cutout area 110 to await coating of the cell 10 by the coating assembly 300, and to move the cell support platform 200 to the unloading position of the cell 10 after coating is completed.

[0032] In practical application, the battery cell coating apparatus provided in this application embodiment initially moves the battery cell support platform 200 to the preset coating position of the cutout area 110 of the coating worktable 100 by the drive component 400 to wait for the battery cell 10 to be coated from other areas. After the battery cell 10 is placed on the battery cell support platform 200, the coating component 300 works to perform the operation of coating the battery cell 10 with photosensitive adhesive. After the battery cell 10 is coated, the drive component 400 moves the battery cell support platform 200 to the unloading position of the battery cell 10 to prepare for subsequent processing steps.

[0033] The battery cell coating apparatus provided in this application embodiment has a hollowed-out area 110 matching the size of the battery cell 10 set in the coating worktable 100, and a battery cell support platform 200 that can be embedded in the hollowed-out area 110 to support the battery cell 10. The coating component 300 operates in the hollowed-out area 110 to perform a coating operation on the battery cell 10 in the hollowed-out area 110. The battery cell coating apparatus provided in this application embodiment does not require vacuum adsorption of the battery cell 10 during coating, thereby avoiding the problem of different thicknesses of photosensitive adhesive coated at the adsorption and non-adsorption positions caused by vacuum adsorption of the battery cell 10, and improving the coating uniformity of the battery cell 10.

[0034] It is understood that the battery cell coating apparatus of this application embodiment is designed to allow the battery cell 10 to be precisely embedded in the hollow area 110 of the coating worktable 100, and to use the battery cell support platform 200 to support the battery cell 10, thereby fixing the battery cell 10 in the hollow area 110, thus avoiding the influence of vacuum adsorption on the battery cell 10 during the coating process. It should be noted that the specific structure of the coating component 300 and the driving component 400 in this apparatus is not limited here. As long as the coating component 300 has the function of coating photosensitive adhesive, and the driving component 400 can support the battery cell support platform 200 and drive the battery cell support platform 200 to move, it is sufficient. Furthermore, the related technologies for realizing the functions of the coating component 300 and the driving component 400 are within the scope of existing technology. This application focuses on avoiding the adverse effects of vacuum adsorption through innovative layout and operation methods, rather than making new technical innovations to the internal structure of these two components. Similarly, this application embodiment does not limit the placement method of the coating component 300. For example, as shown... Figure 1 As shown, the coating assembly 300 is connected to the fixture 600 suspended at the top via the first support frame 610.

[0035] In some embodiments, Figure 2 This application provides a view of a battery cell coating apparatus, as illustrated in the embodiment of the present application. Figure 2As shown, in the battery cell coating apparatus provided in this application embodiment, the height of the preset coating position of the hollow area 110 from the upper surface of the coating worktable 100 is the sum of the thickness of the battery cell 10 and the thickness of the photosensitive adhesive 20 to be coated on the battery cell 10.

[0036] The battery cell coating apparatus provided in this application embodiment sets the height of the preset coating position of the hollow area 110 from the upper surface of the coating worktable 100 to be the sum of the thickness of the battery cell 10 and the thickness of the photosensitive adhesive 20 to be coated on the battery cell 10. In this way, when the coating component 300 performs the photosensitive adhesive 20 coating operation, it only needs to coat the photosensitive adhesive 20 to be flush with the upper surface of the coating worktable 100, thereby ensuring that the thickness of the photosensitive adhesive 20 coated on different battery cells 10 is consistent.

[0037] In some embodiments, such as Figure 1 As shown in the embodiment of this application, the battery cell coating apparatus is provided with a plurality of vacuum adsorption holes 210 on the battery cell support platform 200. A vacuum channel (not shown) is provided inside the battery cell support platform 200. The vacuum adsorption holes 210 are connected to an external vacuum adsorption mechanism through the vacuum channel. When the battery cell 10 is placed on the battery cell support platform 200, the battery cell 10 will cover each vacuum adsorption hole 210. At this time, a vacuuming operation is performed by the vacuum adsorption mechanism, and a negative pressure will be formed at each vacuum adsorption hole 210, thereby adsorbing the battery cell 10. In this way, after the battery cell 10 is coated, it can be adsorbed onto the battery cell support platform 200 by vacuum adsorption. After the drive component 400 moves the battery cell support platform 200 to the unloading position of the battery cell 10, the vacuum adsorption mechanism stops vacuuming to release the battery cell 10, so as to avoid displacement or shaking when the battery cell 10 is moved after coating, and ensure that the battery cell 10 is stably placed on the battery cell support platform 200 during the unloading process.

[0038] It is understood that the specific structure of the external vacuum adsorption mechanism is not limited in this application embodiment, and the related technology for realizing the vacuum adsorption function belongs to the prior art. For example, this application embodiment can set the vacuum adsorption mechanism as a vacuum pump, so as to perform a vacuum operation on the battery cell support platform 200 by the vacuum pump, thereby forming a negative pressure at the vacuum adsorption hole 210 on the battery cell support platform 200 to adsorb the battery cell 10.

[0039] In some embodiments, in the battery cell coating apparatus provided in this application, the driving component 400 is a robotic arm, used to drive the battery cell carrying platform 200 to move along a preset path, thereby moving between the preset coating position in the hollow area 110 and the unloading position of the battery cell 10.

[0040] It is understood that the purpose of this application embodiment is not to develop new robotic arm motion control algorithms or drive mechanisms, but to utilize existing mature technologies to use the robotic arm as a drive component 400 to meet the needs of the battery cell coating device to switch between different working positions. In view of this, this application embodiment does not impose further restrictions on the specific structure and execution method of the robotic arm.

[0041] In some embodiments, in the battery cell coating apparatus provided in this application, a robotic arm is used to drive the battery cell support platform 200 to move along a preset first path, thereby achieving lifting and lowering movement between a preset coating position in the hollow area 110 and the lower surface of the coating worktable 100, and to drive the battery cell 10 to move along a preset second path, thereby achieving horizontal movement between the lower surface of the coating worktable 100 and the unloading position of the battery cell 10. Optionally, in this application embodiment, the movement path of the robotic arm is divided into two stages: a lifting movement stage and a horizontal movement stage. During the lifting motion phase, the robotic arm is mainly responsible for driving the battery cell support platform 200 and the battery cell 10 to move up and down, realizing the position transfer between the battery cell support platform 200 at the preset coating position in the hollow area 110 and the lower surface of the coating worktable 100; during the horizontal motion phase, the robotic arm is responsible for driving the battery cell 10 to move along the plane, realizing the position transfer between the lower surface of the coating worktable 100 and the unloading position of the battery cell 10. This embodiment of the application decomposes the complex motion path of the robotic arm into two phases, vertical motion and horizontal motion, thereby reducing the complexity of the robotic arm motion control.

[0042] In some embodiments, such as Figure 1 As shown in the embodiment of this application, the battery cell coating apparatus includes a coating assembly 300 comprising an adhesive supply system 310 and a coating nozzle 320. The adhesive supply system 310 supplies photosensitive adhesive to the coating nozzle 320, which in turn applies the photosensitive adhesive to the battery cell 10.

[0043] In some embodiments, the battery cell coating apparatus provided in this application further includes a loading component (not shown) and a unloading component (not shown). The loading component is used to pick up the battery cell 10 from a preset loading position and place the battery cell 10 onto the battery cell support platform 200. The unloading component is used to pick up the battery cell 10 after the drive component 400 moves the battery cell support platform 200 to the unloading position of the battery cell 10.

[0044] In some embodiments, the loading position can also be set to the end position of the previous process of the battery cell 10. After the battery cell 10 completes the previous process, the loading component transports the battery cell 10 to the battery cell support platform 200 for coating operation. The unloading position is set to the start position of the next process of the battery cell 10. After the battery cell 10 reaches the unloading position, the unloading component transports the battery cell 10 so that the battery cell 10 leaves the battery cell support platform 200.

[0045] It is understood that the specific structure of the loading and unloading components is not limited in the embodiments of this application. For example, both the loading and unloading components can be configured to include a suction cup device and a moving device. The suction cup device picks up the battery cell 10, and the driving device drives the suction cup to move, thereby transporting the battery cell 10 from the loading position to the battery cell carrying platform 200, and after the battery cell carrying platform 200 reaches the unloading position, the battery cell 10 is moved away from the battery cell carrying platform 200.

[0046] In some embodiments, the battery cell coating apparatus provided in this application further includes a cleaning component 500, which is used to clean the cutout area 110 after the coating operation is completed, thereby preventing residual photosensitive adhesive from affecting the next coating operation.

[0047] It is understood that the specific structure of the cleaning component 500 is not limited in this embodiment. For example, the cleaning component 500 can be configured as a cleaning nozzle to spray cleaning liquid / cleaning spray to remove residual photosensitive adhesive. Alternatively, the cleaning component 500 can also be configured to include a cleaning brush, which is driven by a drive mechanism to clean the residual photosensitive adhesive in the hollowed-out area 110 along a preset path. Similarly, the placement of the cleaning component 500 is not limited in this embodiment. For example, Figure 1 As shown, the cleaning component 500 is connected to the fixture 600 suspended from the top via the second support frame 620.

[0048] In some embodiments, the solar cell coating apparatus provided in this application provides a heterojunction solar cell 10. Optionally, heterojunction solar cells are thinner than ordinary solar cells, typically with a thickness between 100 and 150 micrometers. Therefore, when coating heterojunction solar cells using conventional methods, they are significantly more affected by vacuum adsorption than ordinary solar cells. Thus, the embodiments of this application, when applied to heterojunction solar cells, can obviously better overcome these problems, thereby exhibiting better results and ensuring the coating quality and production efficiency of heterojunction solar cells.

[0049] In some embodiments, the battery cell coating apparatus provided in this application has a horizontally arranged glass tabletop.

[0050] The battery cell coating apparatus provided in this application embodiment sets a hollow area on the coating worktable that matches the size of the battery cell, and sets a battery cell support platform that can be embedded in the hollow area to support the battery cell. The coating component operates in the hollow area to perform a coating operation on the battery cell in the hollow area. The battery cell coating apparatus provided in this application embodiment does not require vacuum adsorption of the battery cell during coating, thereby avoiding the problem of different photosensitive emulsion thicknesses at the adsorption and non-adsorption positions caused by vacuum adsorption of the battery cell, and improving the coating uniformity of the battery cell. Furthermore, the battery cell coating apparatus provided in this application embodiment sets the preset coating position of the hollow area at a height from the upper surface of the coating worktable equal to the sum of the battery cell thickness and the thickness of the photosensitive emulsion to be coated on the battery cell. In this way, when the coating component performs the photosensitive emulsion coating operation, it only needs to coat the photosensitive emulsion flush with the upper surface of the coating worktable, thereby ensuring that the thickness of the photosensitive emulsion coated on different battery cells is consistent.

[0051] The above description, in conjunction with specific embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications and substitutions should be considered within the scope of protection of this application.

Claims

1. A battery cell coating apparatus, characterized in that, include: The coating worktable has a cutout area that matches the size of the solar cell. A battery cell support platform is provided corresponding to the hollowed-out area, and the battery cell support platform is embedded in the hollowed-out area to support the battery cell; The coating assembly is disposed opposite to the hollow area of ​​the coating worktable and is used to perform the operation of coating photosensitive adhesive on the battery cells supported by the battery cell support platform. A drive component, connected to the battery cell support platform, is used to move the battery cell support platform to a preset coating position in the hollowed-out area to wait for the coating component to coat the battery cell, and to move the battery cell support platform to the unloading position of the battery cell after the battery cell coating is completed.

2. The battery cell coating apparatus as described in claim 1, characterized in that, The distance from the preset coating position of the hollow area to the upper surface of the coating worktable is the sum of the thickness of the battery cell and the thickness of the photosensitive adhesive to be coated on the battery cell.

3. The battery cell coating apparatus as described in claim 1, characterized in that, The battery cell support platform is provided with multiple vacuum adsorption holes, and a vacuum channel is provided inside the battery cell support platform. The vacuum adsorption holes are connected to an external vacuum adsorption mechanism through the vacuum channel. They are used to adsorb the battery cell onto the battery cell support platform by vacuum adsorption after the battery cell coating is completed, and to release the battery cell after the drive assembly moves the battery cell support platform to the battery cell unloading position.

4. The battery cell coating apparatus as described in claim 1, characterized in that, The driving component is a robotic arm, which drives the battery cell carrying platform to move along a preset path, between the preset coating position in the hollowed-out area and the unloading position of the battery cell.

5. The battery cell coating apparatus as described in claim 4, characterized in that, The robotic arm is used to move the battery cell carrying platform along a preset first path to move vertically between a preset coating position in the hollowed-out area and the lower surface of the coating worktable, and to move the battery cell along a preset second path to move horizontally between the lower surface of the coating worktable and the unloading position of the battery cell.

6. The battery cell coating apparatus as described in claim 1, characterized in that, The coating assembly includes an adhesive supply system and a coating nozzle; The adhesive supply system is used to supply photosensitive adhesive to the coating nozzle, which is used to perform the photosensitive adhesive coating operation on the battery cell.

7. The battery cell coating apparatus as described in claim 1, characterized in that, The battery cell coating device also includes a feeding assembly and a discharging assembly; The feeding assembly is used to pick up the battery cell from a preset feeding position and place the battery cell on the battery cell carrying platform; The unloading component is used to pick up the battery cell after the drive component moves the battery cell carrier platform to the unloading position of the battery cell.

8. The battery cell coating apparatus as described in claim 1, characterized in that, The battery cell coating apparatus further includes: A cleaning component is used to clean the cut-out area after the coating operation is completed.

9. The battery cell coating apparatus as described in claim 1, characterized in that, The solar cell is a heterojunction solar cell.

10. The battery cell coating apparatus as described in claim 1, characterized in that, The coating workbench has a horizontally arranged glass tabletop.

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