Battery piece exposure device and battery piece production system
By using a cell exposure device that directly prints grid line patterns onto the cells, the problems of poor batch printing and fragmentation caused by mask board contamination have been solved, thus improving stability and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGWEI SOLAR ENERGY (CHENGDU) CO LID
- Filing Date
- 2025-06-06
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, the mask board is prone to getting dirty during the solar cell printing process, leading to problems such as poor batch printing and solar cell fragmentation.
A solar cell exposure device is used, which uses a printing platform and printing mechanism to directly print grid lines on the solar cell using printing components and lifting components, avoiding the use of a mask plate for masking.
It improves the problem of poor batch printing caused by dirty mask boards, enhances printing stability and quality, and reduces the occurrence of cell fragments.
Smart Images
Figure CN224137620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell manufacturing technology, and more specifically, to a battery cell exposure device and a battery cell production system. Background Technology
[0002] The THL (Copper Interconnect) production line process includes: incoming yellow film solar cells - coating - printing the front side - flipping - printing the back side - developing - edge binding - electroplating, etc. In the printing process, a mask board can be used to shield the solar cells and expose them. The patterned areas (light-shielding areas) on the mask prevent the light source from reaching the surface of the solar cell, thus preserving the properties of the photosensitive emulsion at the corresponding locations. Meanwhile, the light-transmitting areas (non-light-shielding areas) on the mask allow the light source to reach the photosensitive emulsion on the corresponding solar cell, causing the emulsion to change its properties (curing). During the developing process, the altered photosensitive emulsion is not washed away, while the unchanged photosensitive emulsion is washed away, exposing the underlying copper film. This achieves the purpose of creating grooves, upon which copper grid lines can then be grown.
[0003] However, the printing process of related technologies, which uses a mask plate for exposure, is prone to mask contamination. Dust from the solar cells can easily stick to the mask plate, leading to batch printing defects when using the mask plate for subsequent solar cell exposure. Utility Model Content
[0004] The purpose of this invention is to provide a solar cell exposure device and a solar cell production system. The solar cell exposure device can be used in the solar cell production system, and it can prepare grid patterns on the solar cell without using a mask plate for exposure. Therefore, it can improve the problem of poor batch printing of solar cells caused by mask plate contamination, effectively ensure printing stability, improve printing quality, and reduce the problem of solar cell fragmentation caused by mask plate squeezing the solar cells.
[0005] The embodiments of this utility model can be implemented as follows:
[0006] In a first aspect, this utility model provides a battery cell exposure apparatus, comprising:
[0007] A printing platform, used to hold the battery cells; and,
[0008] The printing mechanism includes a lifting component and a printing component. The lifting component is connected to the printing component by a drive and is used to drive the printing component to move closer to or away from the solar cell placed on the printing platform so that the printing component can print the grid pattern on the solar cell.
[0009] In an optional embodiment, the printing assembly includes a printing plate and an injection tube, at least one of which is drivenly connected to a lifting assembly. The injection tube is used to inject printing ink into the printing plate. The printing plate is configured to approach the solar cell under the drive of the lifting assembly and print ink onto the solar cell to form a grid pattern.
[0010] In an optional embodiment, the printing mechanism also includes a base, and the printing plate and the injection tube are all connected to the lifting assembly via the base.
[0011] In an optional embodiment, the cell exposure apparatus further includes a conveying mechanism that is driven in conjunction with the printing platform to drive the printing platform and the cell placed on the printing platform to move.
[0012] In an optional embodiment, the cell exposure apparatus further includes a detection mechanism for detecting the position of the printing platform.
[0013] In an optional embodiment, the cell exposure apparatus further includes a baking mechanism located downstream of the printing mechanism; the conveying mechanism is configured to deliver the printing platform from below the printing assembly to the baking mechanism, which is used to bake the grid pattern printed on the cell placed on the printing platform.
[0014] In an optional embodiment, the cell exposure apparatus further includes a photocuring mechanism located downstream of the baking mechanism; the conveying mechanism is further configured to deliver a printing platform from the baking mechanism to the photocuring mechanism, the photocuring mechanism being used to photocur the areas on the cell placed on the printing platform that do not have grid pattern.
[0015] In an optional embodiment, the cell exposure apparatus further includes a discharge mechanism for removing the cells from the printing platform.
[0016] In an optional embodiment, the cell exposure apparatus further includes a feeding mechanism for placing the cell onto the printing platform.
[0017] Secondly, this utility model provides a battery cell production system, including a battery cell exposure device according to any of the foregoing embodiments.
[0018] The beneficial effects of the battery cell exposure device according to this embodiment of the present invention include: the battery cell exposure device provided by this embodiment of the present invention includes a printing platform and a printing mechanism. The printing platform is used to place the battery cell; the printing mechanism includes a lifting component and a printing component. The lifting component is convexly connected to the printing component and is used to drive the printing component to move closer to or away from the battery cell placed on the printing platform, so that the printing component prints the grid pattern on the battery cell. The aforementioned grid pattern is a light-shielding area formed on the battery cell. In this way, the ink printed on the battery cell by the printing component can be used to form a light-shielding area, eliminating the need for a mask plate for shielding. Therefore, it can improve the problem of poor batch printing of battery cells caused by mask plate contamination, effectively ensure printing stability, improve printing quality, and reduce the problem of battery cell fragmentation caused by mask plate squeezing the battery cell.
[0019] The battery cell production system of this utility model embodiment includes all the beneficial effects of the aforementioned battery cell exposure device, such as: improving the problem of poor batch printing of battery cells due to mask plate contamination, effectively ensuring printing stability, improving printing quality, and reducing the problem of battery cell fragmentation caused by mask plate squeezing the battery cells. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the battery cell exposure device in an embodiment of this utility model.
[0022] Icons: 010-Battery cell exposure device; 100-Printing platform; 200-Printing mechanism; 210-Lifting assembly; 220-Printing assembly; 221-Printing plate; 222-Injection tube; 230-Base; 300-Conveying mechanism; 400-Baking mechanism; 500-Photocuring mechanism; 610-Feeding mechanism; 620-Discharge mechanism. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0026] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0027] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0028] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0029] This embodiment provides a battery cell production system, which can be used for coating battery cells with photosensitive emulsion, exposure, development, edge wrapping, and electroplating.
[0030] The cell production system includes a cell exposure device 010 (such as...). Figure 1 As shown, the cell exposure device 010 is used to expose the photosensitive emulsion coated on the cell so that the unexposed pattern area can be washed away in the subsequent development step, exposing the copper film at the bottom of the cell, thus achieving the purpose of grooving.
[0031] Please refer to Figure 1The solar cell exposure apparatus 010 includes a printing platform 100 and a printing mechanism 200. The printing platform 100 is used to place solar cells. The printing mechanism 200 includes a lifting component 210 and a printing component 220. The lifting component 210 is kinetically connected to the printing component 220 and is used to drive the printing component 220 closer to or further away from the solar cells placed on the printing platform 100, so that the printing component 220 prints a grid pattern on the solar cells. The aforementioned grid pattern is a light-shielding area formed on the solar cells. In this way, the ink printed on the solar cells by the printing component 220 can be used to form a light-shielding area, eliminating the need for a mask plate for shielding. Therefore, it can improve the problem of poor batch printing of solar cells caused by mask plate contamination, effectively ensure printing stability, improve printing quality, and reduce the problem of solar cells breaking due to mask plate compression.
[0032] Furthermore, the printing assembly 220 includes a printing plate 221 and an injection tube 222. Both the printing plate 221 and the injection tube 222 are connected to the lifting assembly 210 via a transmission mechanism. The injection tube 222 is used to inject printing ink into the printing plate 221. The printing plate 221 is provided with a printed pattern corresponding to the grid line pattern, and the printing plate 221 is configured to approach the battery cell under the drive of the lifting assembly 210 and print the ink on the printed pattern onto the battery cell to form the grid line pattern. With this configuration, the grid line pattern can be reliably printed onto the battery cell using the printing plate 221, so as to form a light-shielding area using the grid line pattern. During the required exposure, the photosensitive adhesive corresponding to the grid line pattern will not denature (photocur).
[0033] Furthermore, the printing mechanism 200 also includes a base 230. The printing plate 221 and the injection tube 222 are both connected to the lifting assembly 210 via the base 230. The outlet of the injection tube 222 is opposite to the printing plate 221, so that ink is output from the outlet onto the printing plate 221. This arrangement ensures the reliability of the simultaneous lifting of the printing plate 221 and the injection tube 222, thereby stably and reliably printing grid lines on the solar cell.
[0034] The connection methods between the printing plate 221 and the injection tube 222 and the base 230 include, but are not limited to, snap-fit, threaded connection, and connection by fasteners such as bolts.
[0035] Of course, in other embodiments, the printing plate 221 can be connected to the lifting assembly 210 via a transmission connection. When the lifting assembly 210 drives the printing plate 221 to rise to the injection position, the outlet of the injection tube 222 is opposite to the printing plate 221, so that the injection tube 222 can deliver ink to the printing plate 221 through the outlet. When the lifting assembly 210 drives the printing plate 221 to fall, the ink on the printing plate 221 can be printed onto the battery cell to form a grid pattern on the battery cell.
[0036] It should be noted that the printing mechanism 200 can also be used to print grid lines on the battery cell as follows: the lifting assembly 210 drives the printing plate 221 to move down to contact the battery cell on the printing platform 100, and then the ink is injected onto the printing plate 221 through the injection tube 222 so that the ink is printed on the battery cell according to the printing pattern on the printing plate 221 to form a grid line pattern. Then the lifting assembly 210 drives the printing plate 221 to move up and away from the battery cell.
[0037] Optionally, the injection tube 222 is connected to an electrically controlled valve to control the opening and closing of the outlet, so that when ink needs to be injected into the printing plate 221, the outlet can be opened by the electrically controlled valve, and when ink does not need to be injected into the printing plate 221, the outlet can be closed by the electrically controlled valve.
[0038] It should be noted that the pattern printed on the solar cell by the printing plate 221 is black or brown. Optionally, the ink used for printing can be acidic complex black WAN, which is an organic pigment with the chemical name N-sulfonylpropylazobenzene-3,4,5-tricarboxylic acid (Acidol Black WAN). This organic pigment has a deep black to brown color and is an acidic dye. Since acidic complex black WAN is a dark dye, it can effectively block the printing light source from curing the photosensitive emulsion coated on the surface of the solar cell. As a carboxylic acid solvent, acidic complex black WAN can react with the developer (NA2CO3), so that the photosensitive emulsion blocked by the printed pattern can be reliably washed away by the developer to form grooves on the solar cell for growing copper grid lines.
[0039] The lifting assembly 210 can be selected as needed, such as: gear and rack assembly, lead screw assembly, push rod assembly, etc. Taking the lead screw assembly as an example, the lead screw assembly includes a motor and a lead screw connected to the motor drive. The lead screw extends vertically, and the base 230 is threadedly connected to the lead screw. When the motor drives the lead screw to rotate, the lead screw drives the base 230 to drive the printing plate 221 and the injection tube 222 to rise and fall synchronously.
[0040] Please refer to Figure 1 The battery cell exposure apparatus 010 in this embodiment also includes a conveying mechanism 300, which is driven in conjunction with the printing platform 100 to drive the printing platform 100 and the battery cells placed on the printing platform 100 to move. The conveying mechanism 300 enables automated production and reduces manual labor. For example, the conveying mechanism 300 can deliver the printing platform 100 and the battery cells placed on the printing platform 100 together to the bottom of the printing plate 221, eliminating the need for manual movement of the printing platform 100 and the battery cells placed on the printing platform 100 to the bottom of the printing plate 221.
[0041] Optionally, the conveying mechanism 300 is a conveyor belt mechanism, which includes a motor, a conveyor belt, and two drive wheels. The two drive wheels are spaced apart, and the conveyor belt is fitted onto the two drive wheels and tensioned by the two drive wheels. One of the conveyor belts is connected to the output shaft of the motor, and the printing platform 100 is placed on the conveyor belt. When the motor drives the drive wheel connected to it to rotate, the drive wheel drives the conveyor belt to move, and the printing platform 100 can be moved by the conveyor belt.
[0042] Of course, in other embodiments, the conveying mechanism 300 may also be a gear and rack mechanism, etc., which are not specifically limited here.
[0043] Optionally, the battery cell exposure apparatus 010 also includes a feeding mechanism 610, which is located upstream of the printing mechanism 200. The feeding mechanism 610 is used to place battery cells onto the printing platform 100, that is, the feeding mechanism 610 is used to place the battery cells to be printed and exposed onto the printing platform 100 located upstream of the printing mechanism 200. Then, the conveying mechanism 300 can move and deliver the printing platform 100 and the battery cells to below the printing plate 221. The feeding mechanism 610 further ensures automated production. The feeding mechanism 610 includes, but is not limited to, a suction cup mechanism and a robotic arm.
[0044] Optionally, the cell exposure apparatus 010 also includes a detection mechanism (not shown), which detects the position of the printing platform 100; specifically, the detection mechanism detects whether the printing platform 100 has moved below the printing plate 221 of the printing assembly 220. Thus, when the detection mechanism detects that the printing platform 100 has moved below the printing plate 221, the conveying mechanism 300 stops conveying the printing platform 100, and the lifting assembly 210 drives the printing plate 221 down to print the grid pattern onto the cell placed on the printing platform 100. The detection mechanism ensures both automated production and printing accuracy.
[0045] The testing agency can choose according to its needs, such as: camera, infrared sensor, light sensor, etc. Taking the camera as an example, the camera is mounted on the lifting assembly 210 and is used to photograph the area below the printing plate 221. When the camera photographs the printing platform 100, it can be determined that the printing platform 100 has moved below the printing plate 221.
[0046] Please refer to Figure 1The battery cell exposure apparatus 010 of this embodiment also includes a baking mechanism 400, which is disposed downstream of the printing mechanism 200. The conveying mechanism 300 is configured to deliver the printing platform 100 from below the printing assembly 220 to the baking mechanism 400. The baking mechanism 400 is used to bake the grid pattern printed on the battery cell placed on the printing platform 100. The ink printed on the battery cell is dried to facilitate subsequent exposure processes.
[0047] Optionally, the baking mechanism 400 includes electric heating tubes spaced above the conveying mechanism 300. When the conveying mechanism 300 delivers the printing platform 100 and the battery cells placed on the printing platform 100 to the area below the electric heating tubes, the electric heating tubes can be used to bake the ink printed on the battery cells.
[0048] Of course, in other embodiments, the baking mechanism 400 may also be a hot air mechanism disposed above the conveying mechanism 300, which is not specifically limited here.
[0049] Please refer to Figure 1 The battery cell exposure apparatus 010 of this embodiment also includes a photocuring mechanism 500, which is disposed downstream of the baking mechanism 400 and spaced above the conveying mechanism 300. The conveying mechanism 300 is also configured to deliver the printing platform 100 from the baking mechanism 400 to the photocuring mechanism 500. That is, the conveying mechanism 300 can deliver the printing platform 100 and the battery cell placed on the printing platform 100 to the light source of the photocuring mechanism 500 so as to use the light source of the photocuring mechanism 500 to perform photocuring (exposure) on the area of the battery cell placed on the printing platform 100 that does not have a grid pattern.
[0050] Optionally, the solar cell exposure apparatus 010 further includes a discharge mechanism 620, which is used to remove the solar cells from the printing platform 100. That is, after the solar cells on the printing platform 100 have completed printing, baking, and photocuring, the discharge mechanism 620 can be used to remove the solar cells from the printing platform 100. The discharge mechanism 620 includes, but is not limited to, a suction cup mechanism and a robotic arm.
[0051] The operation process of the battery cell exposure apparatus 010 in this embodiment includes: the feeding mechanism 610 places the battery cell on the printing platform 100, the conveying mechanism 300 delivers the printing platform 100 and the battery cell together to the area below the printing assembly 220, the lifting assembly 210 drives the printing plate 221 to move downward, and the printing plate 221 prints grid lines on the battery cell; after printing, the lifting assembly 210 drives the printing plate 221 to move upward, and the conveying mechanism 300 drives the printing platform 100 to move the battery cell to the area below the baking mechanism 400, so that the printing ink is dried by the baking mechanism 400; after the ink is dried, the conveying mechanism 300 transports the printing platform 100 to move the battery cell to the area below the photocuring mechanism 500, so that the light source of the photocuring mechanism 500 irradiates the battery cell, so that the non-patterned areas on the battery cell not covered by ink are photocured; finally, the unloading mechanism 620 removes the exposed battery cell.
[0052] In summary, the battery cell exposure device 010 of this utility model can be used in a battery cell production system. Moreover, the battery cell exposure device 010 does not require the use of a mask plate for exposure, and can prepare grid patterns on the battery cell. Therefore, it can improve the problem of poor batch printing of battery cells caused by mask plate contamination, effectively ensure printing stability, improve printing quality, and reduce the problem of battery cell fragmentation caused by mask plate squeezing the battery cell.
[0053] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A battery cell exposure apparatus, characterized in that, include: A printing platform (100) for placing battery cells; as well as, The printing mechanism (200) includes a lifting assembly (210) and a printing assembly (220). The lifting assembly (210) is connected to the printing assembly (220) for driving the printing assembly (220) to move closer to or away from the battery cell placed on the printing platform (100) so that the printing assembly (220) prints the grid pattern on the battery cell.
2. The battery piece exposure apparatus according to claim 1, wherein The printing assembly (220) includes a printing plate (221) and an injection tube (222), at least one of which is kinetically connected to the lifting assembly (210). The injection tube (222) is used to inject printing ink into the printing plate (221). The printing plate (221) is configured to approach the battery cell under the drive of the lifting assembly (210) and print ink on the battery cell to form the grid pattern.
3. The battery piece exposure apparatus according to claim 2, wherein The printing mechanism (200) also includes a base (230), and the printing plate (221) and the injection tube (222) are both connected to the lifting assembly (210) via the base (230).
4. The battery piece exposure apparatus according to claim 1, wherein The battery cell exposure apparatus further includes a conveying mechanism (300), which is in transmission cooperation with the printing platform (100) to drive the printing platform (100) and the battery cell placed on the printing platform (100) to move.
5. The battery slice exposure apparatus according to claim 1, wherein The battery cell exposure apparatus also includes a detection mechanism for detecting the position of the printing platform (100).
6. The battery piece exposure apparatus according to claim 4, wherein The cell exposure apparatus further includes a baking mechanism (400) disposed downstream of the printing mechanism (200); the conveying mechanism (300) is configured to deliver the printing platform (100) from below the printing assembly (220) to the baking mechanism (400), the baking mechanism (400) being used to bake the grid pattern printed on the cell placed on the printing platform (100).
7. The battery piece exposure apparatus according to claim 6, wherein The cell exposure apparatus further includes a photocuring mechanism (500) disposed downstream of the baking mechanism (400); the conveying mechanism (300) is further configured to deliver the printing platform (100) from the baking mechanism (400) to the photocuring mechanism (500), the photocuring mechanism (500) being used to photocur the area on the cell placed on the printing platform (100) that does not have the grid pattern.
8. The battery slice exposure apparatus according to claim 1, wherein The battery cell exposure apparatus further includes a discharge mechanism (620) for removing the battery cell from the printing platform (100).
9. The battery cell exposure apparatus according to claim 1, characterized in that, The battery cell exposure apparatus further includes a feeding mechanism (610) for placing the battery cell onto the printing platform (100).
10. A cell sheet production system characterized by comprising: Includes the battery cell exposure apparatus according to any one of claims 1-9.