A thin-film solar cell curing apparatus

Abstract

The utility model discloses a kind of thin-film solar cell piece curing equipment, belong to thin-film solar cell manufacturing technical field.Aiming at the problem that existing curing equipment is difficult to realize four edges accurate light shielding in continuous conveying, traditional mercury lamp energy consumption is high service life is short, easy to cause cell piece thermal damage, the equipment includes synchronous belt conveying component, light shielding component and curing component, curing component is located below synchronous belt conveying component and light-emitting direction is upward;Light shielding component includes two groups of belt light shielding components, which are arranged on the feeding side and the discharging side of the curing area along the conveying direction, and two groups of support light shielding components arranged symmetrically left and right, which form a light shielding space covering the curing and irradiation area. The equipment can complete four edges accurate light shielding in the continuous conveying process of the cell piece, cooperate with UV-LED cold light source, and has high curing efficiency and yield, low energy consumption, compact structure, and is suitable for automatic photovoltaic production line.

Description

Technical Field

[0001] This utility model belongs to the field of thin-film solar cell manufacturing technology, specifically relating to a UV curing device for thin-film solar cells. Background Technology

[0002] In the manufacturing process of thin-film solar cells, UV adhesive on the glass surface needs to be cured. Traditional curing equipment generally uses UV-mercury lamps as the light source, which has many drawbacks: the electro-optical conversion efficiency is only about 20%, energy consumption is high and a large heat dissipation system is required; the service life is only 1000-2000 hours, and frequent replacement increases downtime and consumable costs; there is a risk of mercury leakage pollution, which does not meet environmental protection requirements; high heat output can easily cause thermal deformation of the cells, reducing the product yield; and the overall equipment is bulky and occupies a large area.

[0003] Furthermore, existing curing equipment struggles to achieve precise shading during continuous cell movement, failing to effectively isolate uncured areas (such as electrodes and frames) on all four sides of the cell. Accidental exposure to ultraviolet light can damage sensitive components, and the equipment cannot meet the continuous production demands of high-speed automated production lines, hindering improvements in curing efficiency. Therefore, there is an urgent need to develop a highly efficient, energy-saving, environmentally friendly, and safe thin-film solar cell curing equipment capable of continuous movement curing and precise four-sided shading. Utility Model Content

[0004] The purpose of this invention is to provide a thin-film solar cell curing device to solve the technical problems existing in the background art.

[0005] This utility model provides a thin-film solar cell curing device, including a synchronous belt conveyor assembly, a light-shielding assembly disposed on the conveying path of the synchronous belt conveyor assembly, and a curing assembly disposed within the light-shielding area of ​​the light-shielding assembly, wherein the light emission direction of the curing assembly is from bottom to top. The light-shielding assembly includes two sets of belt light-shielding assemblies and two sets of supporting light-shielding assemblies. The two sets of belt light-shielding assemblies are respectively arranged on the feed side and discharge side of the curing assembly along the conveying direction. The two sets of belt light-shielding assemblies are configured to be able to reciprocate along the conveying direction and to be able to rise and fall vertically. The two sets of supporting light-shielding assemblies are symmetrically arranged on the left and right sides of the synchronous belt conveying assembly perpendicular to the conveying direction and extend along the conveying direction. The two sets of belt light-shielding assemblies and the two sets of supporting light-shielding assemblies together form a light-shielding space, which blocks the non-curing area around the battery cell.

[0006] In a preferred embodiment, the synchronous belt conveyor assembly includes a conveyor body and a support assembly; the support assembly is disposed within the conveying area of ​​the conveyor body and is located on both sides of the two sets of belt light-shielding assemblies; each set of support assemblies includes multiple spaced support brackets and support rollers rotatably mounted on the support brackets.

[0007] In a preferred embodiment, the belt light-blocking assembly includes a take-up and unwinding assembly, a light-blocking cloth, and a light-blocking cloth driving assembly; one end of the light-blocking cloth is wound around the take-up and unwinding assembly, and the other end is connected to the light-blocking cloth driving assembly.

[0008] In a preferred embodiment, the light-shielding cloth driving assembly includes an X-axis driving module, a Z-axis driving module, and a movable strip; the Z-axis driving module is mounted on the sliding end of the X-axis driving module, and the movable strip is connected to the output end of the Z-axis driving module.

[0009] In a preferred embodiment, the movable strip is provided with a slot, and the end of the light-shielding cloth is engaged in the slot; the movable strip is also provided with a light-shielding cloth pressure strip, which is fixedly connected to the movable strip and clamps the end of the light-shielding cloth. In a preferred embodiment, the upper surface of the movable strip is provided with a plurality of protruding omnidirectional balls at intervals.

[0010] In a preferred embodiment, the light-shielding support assembly is an L-shaped light-shielding support plate, the horizontal section of which extends along the conveying direction and supports the bottom of the synchronous belt, and the vertical section of which extends upward to above the synchronous belt.

[0011] In a preferred embodiment, the curing assembly includes a curing lamp, a lifting bracket, and a lifting adjustment assembly; the curing lamp is fixedly mounted on the lifting bracket, and the lifting adjustment assembly is rotatably connected to the lifting bracket.

[0012] In a preferred embodiment, the curing lamp is a UV-LED lamp.

[0013] In a preferred embodiment, the light-blocking fabric is a light-blocking fabric capable of blocking ultraviolet light.

[0014] The beneficial effects of this utility model's technical solution are: 1. This solution adopts a combination structure of dynamic belt shading components set at the front and rear and static support shading components set on the left and right. It can accurately block the non-cured areas on all four sides during the continuous conveying of battery cells, avoid accidental exposure to ultraviolet light, and improve the product yield.

[0015] 2. This solution supports continuous mobile curing, significantly improving production efficiency compared to traditional intermittent equipment, and is compatible with high-speed automated photovoltaic production lines. It utilizes a UV-LED cold light source, which features low energy consumption, long service life, and eliminates the risk of thermal deformation and mercury pollution, making it energy-saving and environmentally friendly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a schematic diagram of the synchronous belt conveyor assembly of this utility model. Figure 3 This is a schematic diagram of the light-shielding component of this utility model. Figure 4 This is a schematic diagram of the belt-type sunshade component of this utility model. Figure 5 This utility model Figure 4 Schematic diagram of side A in the middle. Figure 6 This utility model Figure 4 Schematic diagram of side B in the middle. Figure 7 This is a schematic diagram of the curing component of this utility model. Figure 8 This is a schematic diagram of the area in the battery cell of this utility model that requires light shading.

[0017] Explanation of reference numerals in the attached drawings: 1 Synchronous belt conveyor assembly, 11 Conveyor body, 12 Support assembly, 121 Support bracket, 122 Support roller, 2 Light-shielding assembly, 21 Belt light-shielding assembly, 211 Unwinding and winding assembly, 212 Light-shielding cloth, 213 Light-shielding cloth drive assembly, 2131 X-axis drive module, 2132 Z-axis drive module, 2133 Moving strip, 2134 Light-shielding cloth pressure strip, 2135 Universal ball, 22 Support light-shielding assembly, 221 L-shaped light-shielding support plate, 23 Feed side, 24 Discharge side, 3 Curing assembly, 31 Curing lamp, 32 Lifting bracket, 33 Lifting adjustment assembly. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0019] like Figure 1As shown, this utility model discloses a thin-film solar cell curing device, including a synchronous belt conveyor assembly 1, a light-shielding assembly 2, and a curing assembly 3. The synchronous belt conveyor assembly 1 is horizontally arranged along the front-to-back conveying direction and is used to carry and continuously convey the thin-film solar cell to be cured. The curing assembly 3 is set below the synchronous belt conveyor assembly 1, with the light emission direction vertically upward. The light-shielding assembly 2 is arranged around the irradiation area of ​​the curing assembly 3, and a light-shielding space is formed by two sets of belt light-shielding assemblies 21 and two sets of supporting light-shielding assemblies 22. The light-shielding space blocks the non-cured areas around the solar cell, ensuring that only the central curing area of ​​the solar cell receives ultraviolet light irradiation, and the non-cured areas on all four sides are effectively isolated.

[0020] like Figure 2 As shown, the synchronous belt conveyor assembly 1 includes a conveyor body 11 and two sets of support assemblies 12. The conveyor body 11 consists of a synchronous belt pulley set driven by a servo motor and an annular polyurethane synchronous belt. Limiting rollers are also provided on the side of the synchronous belt. The conveying speed of the synchronous belt is infinitely adjustable in the range of 0.1-1m / min, which can adapt to the cycle requirements of different curing processes.

[0021] Two sets of support components 12 are symmetrically arranged in the conveying area of ​​the conveying body 11 and are located on both sides of the two sets of belt shading components 21. Each set of support components 12 includes multiple equally spaced support brackets 121 and support rollers 122 rotatably mounted on the top of the support brackets 121. The support rollers 122 are made of wear-resistant nylon material with a smooth and burr-free surface. Their top surface is flush with the upper surface of the synchronous belt, which can effectively support the suspended section of the synchronous belt, prevent the synchronous belt from sagging and deforming due to its own weight and the weight of the battery cells, ensure the flatness and stability of the battery cells during the conveying process, avoid the deviation of the subsequent shading position due to conveying shaking, and improve the curing accuracy.

[0022] like Figure 3 As shown, the light-shielding assembly 2 includes two sets of belt light-shielding assemblies 21 respectively disposed on the feed side 23 and the discharge side 24 along the conveying direction, and two sets of support light-shielding assemblies 22 symmetrically arranged on the left and right sides perpendicular to the conveying direction. Figure 4 , Figure 5 , Figure 6 As shown, each belt shading assembly 21 includes a winding and unwinding assembly 211, a shading cloth 212, and a shading cloth driving assembly 213. The winding and unwinding assembly 211 adopts a roller structure with a built-in torsion spring, which can automatically tension the shading cloth 212 to prevent the shading cloth 212 from loosening and causing wrinkles that affect the shading effect.

[0023] The light-blocking cloth 212 is made of polyester fiber-based black coated UV light-blocking cloth, which is wear-resistant, aging-resistant and tensile-resistant, and has a service life of more than 5,000 hours. One end of it is wound on the roll of the take-up and unwinding assembly 211, and the other end is fixedly connected to the light-blocking cloth drive assembly 213.

[0024] like Figure 4 , Figure 5 , Figure 6 As shown, the light-shielding cloth driving assembly 213 includes an X-axis driving module 2131, a Z-axis driving module 2132, and a moving strip 2133. The X-axis driving module 2131 adopts a ball screw linear module driven by a servo motor, with a repeatability of ±0.1mm and a stroke covering the entire curing irradiation area. The Z-axis driving module 2132 adopts a ball screw module driven by a stepper motor, with a lifting stroke of 0-50mm, and the bonding height can be precisely adjusted according to the thickness of the battery cell. The body of the Z-axis drive module 2132 is fixedly installed on the sliding end of the X-axis drive module 2131. The moving strip 2133 is horizontally fixed to the output end of the Z-axis drive module 2132. A slot extending along the length direction is opened at its end. The end of the light-shielding cloth 212 is locked in the slot. A light-shielding cloth pressure strip 2134 is fixed to the upper surface of the moving strip 2133 by bolts. The light-shielding cloth pressure strip 2134 cooperates with the moving strip 2133 to clamp and fix the end of the light-shielding cloth 212 from top to bottom. The connection is firm and easy to disassemble and assemble.

[0025] The upper surface of the movable strip 2133 is also fitted with multiple protruding stainless steel universal balls 2135 at equal intervals along its length. The top surface of the universal balls 2135 is higher than the upper surface of the light-shielding cloth 212. The belt light-shielding assembly 21 achieves reciprocating movement along the conveying direction through the X-axis drive module 2131 and vertical lifting through the Z-axis drive module 2132. With the universal balls 2135 rolling contact with the bottom of the battery cell, it not only ensures that the light-shielding cloth 212 blocks the bottom of the battery cell, but also avoids hard contact that scratches the battery cell. At the same time, it achieves synchronous movement with the battery cell and completes dynamic blocking of the front and rear non-cured areas during continuous conveying.

[0026] like Figure 3 and Figure 5 As shown, both sets of supporting shading components 22 are integrated L-shaped shading support plates 221, made of aluminum alloy through bending and forming, with an anodized black finish, possessing both excellent shading performance and structural strength. The horizontal section of the L-shaped shading support plate 221 extends continuously along the conveying direction, supporting the bottom of the synchronous belt and further enhancing the load-bearing capacity of the synchronous belt. Its vertical section extends vertically upward to the top of the synchronous belt, completely covering the non-cured areas on both sides of the solar cells. The supporting shading component 22 adopts an integrated structural design, simultaneously realizing the dual functions of synchronous belt support and static shading on the left and right sides. It eliminates the need for additional independent support and shading structures, simplifying the overall equipment layout, reducing the number of parts, and lowering manufacturing costs and maintenance difficulty.

[0027] like Figure 7As shown, the curing assembly 3 includes a curing lamp 31, a lifting bracket 32, and a lifting adjustment assembly 33. The curing lamp 31 uses a 365nm main wavelength UV-LED array lamp board, which is composed of multiple high-power UV-LED chips evenly arranged, with light intensity uniformity ≥90%, electro-optical conversion efficiency ≥40%, and no infrared radiation, belonging to a cold light source. The curing lamp 31 is fixedly installed on the top surface of the lifting bracket 32 ​​by bolts. The lifting bracket 32 ​​is welded from aluminum alloy profiles, with a stable structure and not easily deformed.

[0028] The lifting adjustment assembly 33 is rotatably connected to the lifting bracket 32, and includes a handwheel, a trapezoidal lead screw, and two sets of parallel guide rods. The trapezoidal lead screw is rotatably connected to the bottom of the lifting bracket 32, and the two guide rods are respectively inserted through both sides of the lifting bracket 32 ​​and fixedly connected to the equipment frame. The trapezoidal lead screw is threadedly connected to the equipment frame. Rotating the handwheel can drive the trapezoidal lead screw to rotate, thereby making the lifting bracket 32 ​​vertically lift or lower relative to the equipment frame. The above lifting adjustment method is a conventional method in the prior art. The distance between the curing lamp 31 and the bottom of the battery cell can be precisely adjusted through the lifting adjustment assembly 33, thereby changing the ultraviolet light energy density irradiated on the surface of the battery cell, adapting to the curing requirements of different thicknesses and different adhesive types, and improving the process adaptability of the equipment.

[0029] like Figure 8 As shown, this equipment is designed with the above-mentioned combined light-shielding structure for the non-cured parts of the battery cell frame area. During operation, the battery cells to be cured are first transported to the equipment inlet by the front loading platform. The servo motor of the synchronous belt conveyor component 1 drives the synchronous belt to continuously transport the battery cells along the X direction (to the right) at a set speed. The conveying speed is preset according to the curing process requirements.

[0030] When the front end of the solar cell is about 200mm away from the belt light-shielding assembly 21 on the feeding side 23, the synchronous belt conveyor 1 automatically decelerates. When the photoelectric sensor detects that the front end of the solar cell has reached the predetermined position, the synchronous belt conveyor 1 stops briefly for precise positioning. At this time, the Z-axis drive module 2132 of the belt light-shielding assembly 21 on the feeding side 23 drives the moving strip 2133 to rise vertically, so that the universal ball 2135 on the moving strip 2133 is tightly attached to the non-cured area at the bottom of the front end of the solar cell.

[0031] Subsequently, the UV-LED curing lamp 31 instantly turns on to full power output, and the synchronous belt conveyor assembly 1 resumes the set speed to continue conveying the battery cell to the right. At the same time, the X-axis drive module 2131 of the belt shading assembly 21 on the feeding side 23 drives the moving strip 2133 and the shading cloth 212 to move to the right at the same speed as the synchronous belt, ensuring that the shading cloth 212 is relatively stationary with respect to the battery cell. At this time, the curing area in the middle of the battery cell is exposed to ultraviolet light and begins to cure. The non-curing area at the front end is completely blocked by the shading cloth 212, and the non-curing areas on the left and right sides are blocked by the L-shaped shading support plate 221, so there is no accidental ultraviolet light irradiation.

[0032] When the moving strip 2133 of the belt shading assembly 21 on the feed side 23 is completely removed from the irradiation area of ​​the curing lamp 31, the Z-axis drive module 2132 drives the moving strip 2133 to descend vertically and detach from the bottom of the cell. At this time, there is no ultraviolet light irradiation in this area, and no false irradiation will occur. Subsequently, the X-axis drive module 2131 drives the moving strip 2133 to quickly return to the initial position, ready for the next cycle. The cell continues to be conveyed to the right, and the middle curing area continues to cure within the irradiation area.

[0033] As the uncured area at the tail of the battery cell gradually approaches the irradiation area, the encoder calculates and determines that the tail of the battery cell reaches directly above the belt shading assembly 21 on the discharge side 24. At this time, the Z-axis drive module 2132 of the belt shading assembly 21 on the discharge side 24 drives the moving strip 2133 to rise vertically and fit into the uncured area at the bottom of the tail of the battery cell. At the same time, the X-axis drive module 2131 drives the moving strip 2133 and the shading cloth 212 to move to the right at the same speed as the synchronous belt, blocking the uncured area at the tail of the battery cell.

[0034] Once the tail of the solar cell, along with the moving strip 2133 of the belt light-shielding assembly 21 on the discharge side 24, has completely moved out of the irradiation area of ​​the curing lamp 31, the curing lamp 31 automatically turns off. The Z-axis drive module 2132 drives the moving strip 2133 to descend vertically and detach from the bottom of the solar cell. The solar cell continues to be conveyed to the right, flows out of the equipment, and enters the next process. Subsequently, the X-axis drive module 2131 of the belt light-shielding assembly 21 on the discharge side 24 drives the moving strip 2133 back to its initial position. After both sets of belt light-shielding assemblies 21 have reset, the next solar cell enters the equipment, and the above steps are repeated to achieve continuous automated production.

[0035] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A thin-film solar cell curing device, characterized in that: It includes a synchronous belt conveyor assembly, a light-shielding assembly disposed on the conveying path of the synchronous belt conveyor assembly, and a curing assembly disposed within the light-shielding area of ​​the light-shielding assembly, wherein the light emission direction of the curing assembly is from bottom to top; The light-shielding assembly includes two sets of belt light-shielding assemblies and two sets of support light-shielding assemblies. The two sets of belt light-shielding assemblies are respectively arranged on the feed side and discharge side of the curing assembly along the conveying direction. The two sets of belt light-shielding assemblies are configured to be able to reciprocate along the conveying direction and to be able to rise and fall vertically. The two sets of support light-shielding assemblies are symmetrically arranged on the left and right sides of the synchronous belt conveying assembly perpendicular to the conveying direction and extend along the conveying direction. The two sets of belt light-shielding assemblies and the two sets of support light-shielding assemblies together form a light-shielding space, which blocks the non-curing area around the battery cell.

2. The thin-film solar cell curing equipment according to claim 1, characterized in that: The synchronous belt conveyor assembly includes a conveyor body and a support assembly; the support assembly is disposed within the conveying area of ​​the conveyor body and is located on both sides of the two sets of belt light-shielding assemblies; each set of support assemblies includes multiple spaced support brackets and support rollers rotatably mounted on the support brackets.

3. The thin-film solar cell curing equipment according to claim 1, characterized in that: The belt shading assembly includes a take-up and unwind assembly, a shading cloth, and a shading cloth driving assembly; one end of the shading cloth is wound around the take-up and unwind assembly, and the other end is connected to the shading cloth driving assembly.

4. The thin-film solar cell curing equipment according to claim 3, characterized in that: The light-shielding cloth driving assembly includes an X-axis driving module, a Z-axis driving module, and a moving strip; the Z-axis driving module is mounted on the sliding end of the X-axis driving module, and the moving strip is connected to the output end of the Z-axis driving module.

5. The thin-film solar cell curing equipment according to claim 4, characterized in that: The movable strip has a slot, and the end of the light-blocking cloth is locked in the slot; the movable strip is also provided with a light-blocking cloth pressure strip, which is fixedly connected to the movable strip and clamps the end of the light-blocking cloth.

6. The thin-film solar cell curing equipment according to claim 5, characterized in that: The upper surface of the movable strip is provided with a plurality of protruding omnidirectional balls at intervals.

7. The thin-film solar cell curing equipment according to claim 1, characterized in that: The light-shielding support assembly is an L-shaped light-shielding support plate. The horizontal section of the L-shaped light-shielding support plate extends along the conveying direction and supports the bottom of the synchronous belt. The vertical section of the L-shaped light-shielding support plate extends upward to above the synchronous belt.

8. The thin-film solar cell curing equipment according to claim 1, characterized in that: The curing assembly includes a curing lamp, a lifting bracket, and a lifting adjustment assembly; the curing lamp is fixedly installed on the lifting bracket, and the lifting adjustment assembly is rotatably connected to the lifting bracket.

9. The thin-film solar cell curing equipment according to claim 8, characterized in that: The curing lamp is a UV-LED lamp.

10. The thin-film solar cell curing equipment according to claim 3, characterized in that: The light-blocking fabric is a light-blocking fabric capable of blocking ultraviolet light.

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