Method and apparatus for compression curing of photovoltaic modules with interconnects

Abstract

This invention discloses a method and apparatus for pressing and curing densely packed adhesive interconnected photovoltaic modules, relating to the field of photovoltaic cell manufacturing technology. The apparatus includes a frame, a pressure plate translation and lifting mechanism, a carrier, a horizontal transmission mechanism, and a front lamp holder. The method includes the following steps: S1, setting the lower layer solder strip, the solar cell, and the upper layer solder strip sequentially from bottom to top; S2, pre-pressing using the carrier; S3, performing a second pressing using the pressure plate; S4, first curing; S5, raising the pressure plate and removing the carrier; S6, then horizontally moving the solar cell or the pressure plate; S7, performing a third pressing using the pressure plate; S8, second curing. Through a total of three pressing operations, the method can meet the requirement of setting an increasing number of adhesive dots per unit area in the solar cell while ensuring that the solar cell is not easily crushed, allowing all adhesive dots on the solar cell to undergo normal photocuring.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cell manufacturing technology, and in particular to a method and apparatus for pressing and curing dense grid adhesive interconnected photovoltaic modules. Background Technology

[0002] Close-grid adhesive interconnected photovoltaic modules are one of the new photovoltaic technologies currently available. This technology interconnects solar cells and solder ribbons using UV adhesive, eliminating the need for solder ribbon welding and significantly reducing silver consumption. Compared to traditional modules, the cost of close-grid adhesive interconnected modules can be greatly reduced.

[0003] The precise connection of printed cells and solder ribbons is a key workstation in the production of dense grid adhesive interconnected modules. The photocuring process is an important part of module production. Currently, adhesive dots are distributed laterally on the main grid of the cells and longitudinally staggered between the sub-grids. The number of adhesive dots determines the radial tension of the entire solder ribbon bonding, which further affects the overall efficiency of the cells after stringing and subsequent lamination processes.

[0004] Currently, when bonding solder strips and adhesive-dot solar cells, a pressure plate with multiple spring-loaded pressure pins is typically used to press the solder strip downwards, thus bonding it to the adhesive-dot solar cell. However, current solar cells are typically only 0.1mm-0.15mm thick, making them prone to cracking. To prevent cracking, the contact area between the pressure pins and the solder strip or solar cell needs to be large enough to prevent stress concentration. Simultaneously, the pressure pins must be kept away from the adhesive dots during the bonding process, as this prevents the UV curing lamp from reaching the dots and hinders curing.

[0005] However, with the development of close-grid adhesive interconnect photovoltaic module technology, the requirements for the number of adhesive dots in close-grid adhesive interconnect photovoltaic modules are increasing. It is easy to understand that if the size of the cell remains the same and the size of the pressure plate remains the same, the number of adhesive dots will increase, that is, the number of adhesive dots per unit area will increase. In order to ensure the bonding quality, more pressure pins need to be set. However, the size of the pressure pins needs to take into account the bonding effect. The bottom surface of the pressure pin, that is, the bonding surface, needs to be large enough and cannot be too small. The size cannot be further reduced. Therefore, if the cell size remains the same, there is an upper limit to the number of pressure pins, which leads to an upper limit to the number of adhesive dots, making it impossible to meet the requirement of setting more adhesive dots.

[0006] In addition, the existing front and back pressure pin mechanism uses a fixed single servo lifting and pressing method, which results in insufficient adhesion between the solder ribbon and the battery cell. This leads to residual adhesive between the solder ribbon and the battery cell. The area between the solder ribbon and the battery cell is a non-adhesive dot area. The presence of residual adhesive in the non-adhesive dot area will cause shadows in the battery string EL. Summary of the Invention

[0007] The purpose of this invention is to provide a method and apparatus for pressing and curing dense grid adhesive interconnected photovoltaic modules to solve the problems existing in the prior art and meet the needs of setting an increasing number of adhesive dots per unit area.

[0008] To achieve the above objectives, the present invention provides the following solution:

[0009] This invention provides a method for pressing and curing a dense grid adhesive interconnected photovoltaic module, comprising the following steps:

[0010] S1. The lower layer of solder strip, the battery cell and the upper layer of solder strip are arranged from bottom to top;

[0011] S2, First pressing: After the upper layer solder strip is placed in place, a carrier is immediately placed above the upper layer solder strip. The carrier is provided with multiple first pressure pins. When placing the carrier, the bottom surface of all the first pressure pins contacts the upper layer solder strip and covers part of the adhesive dots on the battery cell. In this step, the adhesive dots on the top surface of the battery cell covered by the first pressure pins are the first group of adhesive dots, and the adhesive dots on the top surface of the battery cell not covered by the first pressure pins are the second group of adhesive dots.

[0012] The carrier is provided with a plurality of first hollow parts corresponding to the second group of adhesive dots, and when the carrier is placed, any one of the adhesive dots in the second group of adhesive dots is located below one of the first hollow parts;

[0013] S3. Second pressing: The pressure pin on the pressure plate is the second pressure pin, which corresponds one-to-one with the first pressure pin. The pressure plate is provided with a second hollow part that corresponds one-to-one with the first hollow part, so that the second hollow part is directly opposite the corresponding first hollow part. Then the pressure plate is driven to press down, so that the bottom end of the second pressure pin abuts against the top end of the corresponding first pressure pin, and applies downward pressure to the corresponding first pressure pin.

[0014] S4. First curing: Turn on the front UV lamp and the back UV lamp. The light emitted by the front UV lamp illuminates the second group of adhesive dots through the second cutout and the first cutout. The back UV lamp illuminates all the adhesive dots on the bottom surface of the battery cell, so that the second group of adhesive dots and all the adhesive dots on the bottom surface of the battery cell are cured. Then turn off the front UV lamp and the back UV lamp.

[0015] S5. Raise the pressure plate and remove the carrier;

[0016] S6. Then move the battery cell or the pressure plate horizontally so that any one of the adhesive dots in the first group of adhesive dots is facing a second hollow part, and the second pressure pin is facing the upper solder strip.

[0017] S7. Third pressing: Drive the pressure plate to press down, so that the second pressure needle contacts the upper welding strip, and apply downward pressure to the upper welding strip through the second pressure needle;

[0018] S8. Second curing: Turn on the front UV lamp. The light emitted by the front UV lamp shines on the first group of adhesive dots through the second hollow part, causing the first group of adhesive dots to cure, thus obtaining a dense grid interconnected photovoltaic module. Then turn off the front UV lamp.

[0019] S9. Raise the pressure plate.

[0020] Preferably, in step S7, the second pressure needle covers the second set of adhesive dots.

[0021] Preferably, the number of the first group of adhesive dots, the number of the second group of adhesive dots, the number of the first pressure needle, and the number of the second pressure needle are equal.

[0022] Preferably, the first group of adhesive dots and the second group of adhesive dots are staggered along the length or width direction of the battery cell.

[0023] The present invention also provides an apparatus for pressing and curing a dense grid adhesive interconnected photovoltaic module, and a method for realizing the above-mentioned pressing and curing dense grid adhesive interconnected photovoltaic module, comprising:

[0024] frame;

[0025] The pressure plate translation and lifting mechanism includes a first driving device, a mounting frame, and a second driving device. The first driving device is fixed on the frame and is used to drive the mounting frame to move along a first horizontal direction. The mounting frame and the frame slide in cooperation along the first horizontal direction. The second driving device is fixed on the mounting frame and is used to drive the pressure plate to move up and down in a vertical direction. The pressure plate is provided with a plurality of second pressure pins and a plurality of second hollowed-out portions.

[0026] A carrier, wherein the carrier is provided with a plurality of first pressure pins corresponding one-to-one with the second pressure pins and a plurality of first hollow portions corresponding one-to-one with the second hollow portions;

[0027] A horizontal transport mechanism includes a conveyor belt for moving the battery cells. The conveyor belt has a horizontal transport surface. The rear UV lamp is installed inside the conveyor belt. The surface of the conveyor belt is provided with light-transmitting holes, through which the light from the rear UV lamp can pass.

[0028] A front light holder is provided for mounting the front UV lamp. The front light holder and the frame slide together along the first horizontal direction. A third driving device is fixed on the frame for driving the front light holder to slide relative to the frame. The front UV lamp is located above the pressure plate, and the light emitted by the front UV lamp can pass through the second cutout and the first cutout.

[0029] Preferably, the system further includes a vehicle transfer mechanism, which includes a fourth drive device, a fixed frame, a movable seat, and a fifth drive device. The fourth drive device is fixed on the fixed frame and is used to drive the movable frame to slide relative to the fixed frame. The fifth drive device is fixed on the movable seat, and an electromagnet is fixed at the output end of the fifth drive device. The fifth drive device is used to drive the electromagnet to rise and fall, and the electromagnet is used to attract the vehicle.

[0030] Preferably, a permanent magnet is fixed on the carrier, and the electromagnet is able to attract the permanent magnet.

[0031] The present invention achieves the following technical effects compared to the prior art:

[0032] The method and apparatus for pressing and curing dense grid interconnected photovoltaic modules of the present invention, by pressing the cell and the solder strip a total of three times, can meet the requirement of setting an increasing number of adhesive dots per unit area in the cell without reducing the area of ​​the bottom surface of the pressing pin and ensuring that the cell is not easily crushed, so that all adhesive dots on the cell can be photocured normally.

[0033] Furthermore, in the method and apparatus for pressing and curing interconnected photovoltaic modules with close-grid adhesive of the present invention, by setting up a carrier, on the one hand, the self-weight of the carrier is used to pre-press the upper and lower solder strips, ensuring the accuracy of the pressing position of the upper and lower solder strips; on the other hand, the setting of the carrier can ensure that the relative positions of the lower solder strip, the battery cell and the upper solder strip do not shift during the subsequent transportation of the lower solder strip, the battery cell and the upper solder strip with the conveyor belt, thus ensuring the pressing quality.

[0034] Furthermore, the method and apparatus for pressing and curing dense grid interconnected photovoltaic modules of the present invention can fully ensure that the lower and upper solder strips are pressed into the corresponding adhesive dots by pressing the lower and upper solder strips, the cell and the upper solder strip three times, thus ensuring the adhesion between the lower and upper solder strips and the cell and avoiding residual adhesive between the lower solder strip and the cell, and between the upper solder strip and the cell, thereby avoiding shadows in the EL of the cell string.

[0035] Furthermore, it should be noted that in this field, when the solder ribbon is pressed into the corresponding adhesive dot, it does not flatten or flatten the adhesive dot. Instead, the solder ribbon is pressed into the adhesive dot from the side of the adhesive dot away from the battery cell and directly adheres to the battery cell. Since the thickness of the adhesive dot is less than the diameter of the solder ribbon, the positional relationship between the solder ribbon and the adhesive dot after the solder ribbon is pressed into the adhesive dot can be understood as the adhesive dot partially wrapping the solder ribbon from both sides. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a partial structural schematic diagram of the apparatus for bonding and curing dense grid adhesive interconnected photovoltaic modules according to the present invention;

[0038] Figure 2 This is a schematic diagram of the horizontal transmission mechanism in the apparatus for pressing and curing dense grid adhesive interconnected photovoltaic modules according to the present invention;

[0039] Figure 3 This is a schematic diagram of the carrier transfer mechanism in the apparatus for pressing and curing dense grid interconnected photovoltaic modules of the present invention;

[0040] Figure 4 This is a schematic diagram of the bonding of the battery cell and the upper solder strip in this invention;

[0041] Figure 5 This is a schematic diagram of the carrier placed on the upper welding strip in this invention;

[0042] The components include: 1. Frame; 2. First drive unit; 3. Mounting frame; 4. Second drive unit; 5. Screw lifting mechanism; 6. Front light holder; 7. Third drive unit; 8. Pressure plate; 9. Second pressure pin; 10. Conveyor belt; 11. Light transmission hole; 12. Conveyor motor; 13. Fixing frame; 14. Fourth drive unit; 15. Moving seat; 16. Fifth drive unit; 17. Electromagnet; 18. Battery cell; 19. Upper welding strip; 20. First set of glue dots; 21. Second set of glue dots; 22. Carrier; 23. First pressure pin; 24. First hollow part. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The purpose of this invention is to provide a method and apparatus for pressing and curing dense grid adhesive interconnected photovoltaic modules to solve the problems existing in the prior art and meet the needs of setting an increasing number of adhesive dots per unit area.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1

[0047] This embodiment provides a method for pressing and curing a dense grid adhesive interconnected photovoltaic module, including the following steps:

[0048] S1. The lower layer solder strip, the battery cell 18 and the upper layer solder strip 19 are arranged sequentially from bottom to top;

[0049] S2, First pressing: After the upper solder strip 19 is set in place, a carrier 22 is immediately placed above the upper solder strip 19. The carrier 22 is provided with multiple first pressure pins 23. When placing the carrier 22, the bottom surface of all the first pressure pins 23 contacts the upper solder strip 19 and covers part of the adhesive dots on the battery cell 18. In this step, the adhesive dots on the top surface of the battery cell 18 covered by the first pressure pins 23 are the first group of adhesive dots 20, and the adhesive dots on the top surface of the battery cell 18 not covered by the first pressure pins 23 are the second group of adhesive dots 21.

[0050] The carrier 22 is provided with a plurality of first hollow parts 24 corresponding to the second group of glue dots 21, so that when the carrier 22 is placed, any glue dot in the second group of glue dots 21 is located below a first hollow part 24.

[0051] S3. Second pressing: The pressure needle on the pressure plate 8 is the second pressure needle 9, which corresponds one-to-one with the first pressure needle 23. The pressure plate 8 is provided with a second hollow part that corresponds one-to-one with the first hollow part 24, so that the second hollow part is directly facing the corresponding first hollow part 24. Then the pressure plate 8 is driven to press down, so that the bottom end of the second pressure needle 9 abuts against the top end of the corresponding first pressure needle 23, and applies downward pressure to the corresponding first pressure needle 23.

[0052] S4. First curing: Turn on the front UV lamp and the back UV lamp. The light emitted by the front UV lamp shines on the second set of adhesive dots 21 through the second cutout and the first cutout 24. The back UV lamp shines on all the adhesive dots on the bottom surface of the battery cell 18, so that the second set of adhesive dots 21 and all the adhesive dots on the bottom surface of the battery cell 18 are cured. Then turn off the front UV lamp and the back UV lamp.

[0053] S5. Raise the pressure plate 8 and remove the vehicle 22;

[0054] S6. Then move the battery cell 18 or the pressure plate 8 horizontally so that any one of the adhesive dots in the first group of adhesive dots 20 is facing a second hollow part, and the second pressure pin 9 is facing the upper solder strip 19.

[0055] S7. Third pressing: Drive the pressure plate 8 to press down, so that the second pressure pin 9 contacts the upper solder strip 19, and apply downward pressure to the upper solder strip 19 through the second pressure pin 9;

[0056] S8. Second curing: Turn on the front UV lamp. The light emitted by the front UV lamp shines on the first set of adhesive dots 20 through the second hollow part, causing the first set of adhesive dots 20 to cure, thus obtaining the dense grid interconnected photovoltaic module. Then turn off the front UV lamp.

[0057] S9, Raise the pressure plate 8.

[0058] In the optional scheme of this embodiment, it is more preferred that in step S7, the second pressure needle 9 covers the second group of adhesive dots 21, because the first group of adhesive dots 20 and the second group of adhesive dots 21 are evenly distributed, so as to ensure that the pressure of the second pressure needle 9 on the upper solder strip 19 and the first group of adhesive dots 20 is uniform.

[0059] In an optional embodiment, a preferred arrangement is that the first group of adhesive dots 20 and the second group of adhesive dots 21 are staggered along the width direction of the battery cell 18 (see reference). Figure 4 This ensures that during the first or second pressing, the second pressure pin 9 can press evenly onto the solder strip and the battery cell 18, resulting in uniform force on the battery cell 18 and preventing it from being crushed. In practical applications, depending on specific requirements, the first set of adhesive dots 20 and the second set of adhesive dots 21 can be arranged to be staggered along the length of the battery cell 18.

[0060] In the optional schemes of this embodiment, it is more preferred that the number of the first group of adhesive dots 20, the number of the second group of adhesive dots 21, the number of the first pressure needle 23 and the number of the second pressure needle 9 are equal.

[0061] Example 2

[0062] like Figures 1 to 5As shown, this embodiment provides an apparatus for pressing and curing dense grid interconnected photovoltaic modules, which is used to realize the method of pressing and curing dense grid interconnected photovoltaic modules in Embodiment 1. Specifically, it includes a frame 1, a pressure plate 8 translation and lifting mechanism, a horizontal transmission mechanism, a front lamp holder 6, a carrier 22, and a carrier 22 transfer mechanism.

[0063] The pressure plate 8 translation and lifting mechanism includes a first driving device 2, a mounting frame 3, and a second driving device 4. The first driving device 2 is fixed on the frame 1 and is used to drive the mounting frame 3 to move along a first horizontal direction. The mounting frame 3 and the frame 1 slide in the first horizontal direction. The second driving device 4 is fixed on the mounting frame 3 and is used to drive the pressure plate 8 to rise and fall in the vertical direction. The pressure plate 8 is provided with a plurality of second pressure pins 9 and a plurality of second hollow parts.

[0064] The carrier 22 is provided with a plurality of first pressure pins 23 corresponding one-to-one with the second pressure pins 9 and a plurality of first hollow parts 24 corresponding one-to-one with the second hollow parts;

[0065] The horizontal transmission mechanism includes a conveyor belt 10 for moving the battery cell 18. The conveying surface of the conveyor belt 10 is horizontal. A back UV lamp is provided inside the conveyor belt 10. A light-transmitting hole 11 is provided on the surface of the conveyor belt 10 so that the light from the back UV lamp can pass through the light-transmitting hole 11.

[0066] The front light holder 6 is used to install the front UV lamp. The front light holder 6 and the frame 1 slide together in the first horizontal direction. The frame 1 is fixed with a third driving device 7 for driving the front light holder 6 to slide relative to the frame 1. The front UV lamp is located above the pressure plate 8, and the light emitted by the front UV lamp can pass through the second cutout and the first cutout 24.

[0067] The transfer mechanism of the vehicle 22 includes a fourth drive device 14, a fixed frame 13, a movable seat 15, and a fifth drive device 16. The fourth drive device 14 is fixed on the fixed frame 13 and is used to drive the movable frame to slide relative to the fixed frame 13. The fifth drive device 16 is fixed on the movable seat 15. An electromagnet 17 is fixed at the output end of the fifth drive device 16 and is used to drive the electromagnet 17 to rise and fall. The electromagnet 17 is used to attract the vehicle 22.

[0068] In the optional embodiments of this example, a permanent magnet is fixed on the carrier 22, and the electromagnet 17 is attracted to the permanent magnet.

[0069] In this embodiment, the first drive device 2, the second drive device 4, the third drive device 7, and the fourth drive device 14 all employ servo motors and are equipped with screw-nut transmission mechanisms to convert the output rotational motion into linear motion. For example, the second drive device 4 drives the screw in the screw lifting mechanism 5 to rotate via a transmission belt. The screw rotates in conjunction with the mounting bracket 3. When the screw rotates, the nut threadedly connected to the screw in the screw lifting mechanism 5 drives the pressure plate 8 to rise and fall. It should be noted that the first drive device 2, the second drive device 4, the third drive device 7, the fourth drive device 14, and the fifth drive device 16 can be selected from existing mature equipment such as hydraulic cylinders, pneumatic cylinders, or linear motors, as long as they can achieve their respective functions. The specific settings of the first drive device 2, the second drive device 4, the third drive device 7, the fourth drive device 14, and the fifth drive device 16 and their respective transmission mechanisms can be easily implemented by those skilled in the art based on the description of this embodiment and existing technology, and will not be elaborated further in this embodiment.

[0070] The specific usage process of the device for pressing and curing the dense grid adhesive interconnected photovoltaic module in this embodiment is as follows:

[0071] In the front-end mechanical manual station, the lower layer welding strip, multi-dot battery cell 18, and upper layer welding strip 19 are placed from bottom to top on the conveyor surface of the conveyor belt 10. It should be ensured that any dot on the back of the battery cell 18 corresponds to a light-transmitting hole 11 on the conveyor belt 10. The lower layer welding strip is used to connect with the dot on the back of the battery cell 18, and the upper layer welding strip 19 is used to connect with the intersection on the front of the battery cell 18. Then, immediately place the carrier 22 above the upper layer welding strip 19 and use the carrier 22 to perform pre-pressing (i.e., the first pressing), ensuring that the bottom surface of all the first pressure pins 23 contacts the upper layer welding strip 19 and covers part of the dot on the battery cell 18. In this step, the dot covered by the first pressure pins 23 on the top surface of the battery cell 18 is the first group of dot 20, and the dot not covered by the first pressure pins 23 on the top surface of the battery cell 18 is the second group of dot 21.

[0072] The carrier 22 has multiple first hollow parts 24 corresponding to the second group of glue dots 21. When placing the carrier 22, it should be ensured that any glue dot in the second group of glue dots 21 is located below a first hollow part 24.

[0073] Then, the conveyor motor 12 is turned on, so that the conveyor belt 10 transports the battery cell 18, carrier 22 and welding ribbon to the first pressing station; then, the first driving device 2 drives the pressure plate 8 to move horizontally, so that the pressure plate 8 is directly above the battery cell 18, and the second pressure needle 9 on the pressure plate 8 is directly above the corresponding first pressure needle 23; then, the second driving device 4 drives the pressure plate 8 to press down, performing a second pressing, and the second pressure needle 9 and the first pressure needle 23 give downward pressure to the upper welding ribbon 19, so that the upper welding ribbon 19 is pressed into the glue dots on the front side of the battery cell 18, while at the same time, the welding ribbon can also transmit downward pressure to the battery cell 18, so that the lower welding ribbon is pressed into the glue dots on the back side of the battery cell 18; it should be noted that the magnitude of the downward pressure given to the upper welding ribbon 19 by the second pressure needle 9 and the first pressure needle 23 should be obtained through testing. If the pressure is too small, the adhesion between the upper welding ribbon 19 and the lower welding ribbon and the battery cell 18 may not be ideal, and if the pressure is too large, the battery cell 18 may be broken;

[0074] Then, the third driving device 7 drives the front lamp holder 6 to be positioned directly above the battery cell 18, and simultaneously turns on the back UV lamp and the front UV lamp. The light emitted by the front UV lamp illuminates the second set of adhesive dots 21 through the second cutout and the first cutout 24, and the back UV lamp illuminates all the adhesive dots on the bottom surface of the battery cell 18 through the light-transmitting hole 11. This causes the second set of adhesive dots 21 and all the adhesive dots on the bottom surface of the battery cell 18 to cure. Then, the front UV lamp and the back UV lamp are turned off. The first set of adhesive dots 20 is not cured because it is covered by the first pressure pin 23 and cannot be illuminated by the light emitted by the front UV lamp.

[0075] Then, the second drive device 4 drives the pressure plate 8 to rise, and the conveyor motor 12 is turned on, so that the conveyor belt 10 transports the battery cell 18, the carrier 22 and the welding strip to the transfer station of the carrier 22. Then, the fourth drive device 14 drives the moving seat 15 to move relative to the fixed frame 13, so that the electromagnet 17 is directly above the carrier 22. Then, the fifth drive device 16 drives the electromagnet 17 to descend and turns on the electromagnet 17, so that the electromagnet 17 attracts the permanent magnet on the carrier 22, thereby attracting the carrier 22. Then, the fifth drive device 16 drives the electromagnet 17 to rise, and the fourth drive device 14 drives the moving seat 15 to move relative to the fixed frame 13, so as to transfer the carrier 22.

[0076] Then, the conveyor motor 12 is turned on, so that the conveyor belt 10 transports the battery cell 18, carrier 22, and welding strip to the second pressing station. Then, the first drive device 2 drives the pressure plate 8 to move horizontally, so that the pressure plate 8 is directly above the battery cell 18, and any one of the glue dots in the second group 21 is directly opposite a second pressure needle 9, and any one of the glue dots in the first group 20 is directly opposite a second hollow part, and the second pressure needle 9 is directly opposite the upper welding strip 19. Then, the second drive device 4 drives the pressure plate 8 to press down. The third pressing is performed, which applies downward pressure to the upper solder strip 19 by the second pressing pin 9. The upper solder strip 19 is pressed down to adhere to the battery cell 18, and at the same time, it is fully pressed into the second set of adhesive dots 21 to avoid residual adhesive in the second set of adhesive dots 21. It should be noted that the magnitude of the downward pressure applied to the upper solder strip 19 by the second pressing pin 9 should be obtained through testing. If the pressure is too small, the adhesion between the upper and lower solder strips and the battery cell 18 may not be ideal. If the pressure is too large, the battery cell 18 may crack.

[0077] Then, the front lamp holder 6 is driven to be positioned directly above the battery cell 18 by the third driving device 7, and then the front UV lamp is turned on. The light emitted by the front UV lamp shines on the first set of adhesive dots 20 through the second hollow part, causing the first set of adhesive dots 20 to cure, thus obtaining a dense grid adhesive interconnected photovoltaic module. Then the front UV lamp is turned off.

[0078] Then, the pressure plate 8 can be raised by the second drive device 4.

[0079] In addition, it is worth noting that in this embodiment, the light emitted by the front UV lamp shines on the adhesive dots on the front of the battery cell 18 through the second cutout and the first cutout 24, and the light emitted by the back UV lamp shines on the adhesive dots on the back of the battery cell 18 through the light-transmitting hole 11 on the conveyor belt 10, because it is considered that if the light emitted by the UV lamp shines on the battery cell 18, it will reduce the performance of the battery cell 18. Therefore, the pressure plate 8, the carrier 22 and the conveyor belt 10 are used to block part of the light to achieve the protection of the battery cell 18.

[0080] In the description of this invention, it should be noted that the terms "top," "bottom," "vertical," "horizontal," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0081] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for pressing and curing a dense grid adhesive interconnected photovoltaic module, characterized in that, Includes the following steps: S1. The lower layer of solder strip, the battery cell and the upper layer of solder strip are arranged from bottom to top; S2, First pressing: After the upper layer solder strip is placed in place, a carrier is immediately placed above the upper layer solder strip. The carrier is provided with multiple first pressure pins. When placing the carrier, the bottom surface of all the first pressure pins contacts the upper layer solder strip and covers part of the adhesive dots on the battery cell. In this step, the adhesive dots on the top surface of the battery cell covered by the first pressure pins are the first group of adhesive dots, and the adhesive dots on the top surface of the battery cell not covered by the first pressure pins are the second group of adhesive dots. The carrier is provided with a plurality of first hollow parts corresponding to the second group of adhesive dots, such that when the carrier is placed, any one of the adhesive dots in the second group of adhesive dots is located below one of the first hollow parts. S3. Second pressing: The pressure pin on the pressure plate is the second pressure pin, which corresponds one-to-one with the first pressure pin. The pressure plate is provided with a second hollow part that corresponds one-to-one with the first hollow part, so that the second hollow part is directly opposite the corresponding first hollow part. Then the pressure plate is driven to press down, so that the bottom end of the second pressure pin abuts against the top end of the corresponding first pressure pin, and applies downward pressure to the corresponding first pressure pin. S4. First curing: Turn on the front UV lamp and the back UV lamp. The light emitted by the front UV lamp illuminates the second group of adhesive dots through the second cutout and the first cutout. The back UV lamp illuminates all the adhesive dots on the bottom surface of the battery cell, so that the second group of adhesive dots and all the adhesive dots on the bottom surface of the battery cell are cured. Then turn off the front UV lamp and the back UV lamp. S5. Raise the pressure plate and remove the carrier; S6. Then move the battery cell or the pressure plate horizontally so that any one of the adhesive dots in the first group of adhesive dots is facing a second hollow part, and the second pressure pin is facing the upper solder strip. S7. Third pressing: Drive the pressure plate to press down, so that the second pressure needle contacts the upper welding strip, and apply downward pressure to the upper welding strip through the second pressure needle; S8. Second curing: Turn on the front UV lamp. The light emitted by the front UV lamp shines on the first group of adhesive dots through the second hollow part, causing the first group of adhesive dots to cure, thus obtaining a dense grid interconnected photovoltaic module. Then turn off the front UV lamp. S9. Raise the pressure plate.

2. The method for pressing and curing interconnected photovoltaic modules with dense grid adhesive according to claim 1, characterized in that: In step S7, the second pressure needle covers the second set of adhesive dots.

3. The method for pressing and curing interconnected photovoltaic modules with dense grid adhesive according to claim 1, characterized in that: The number of the first group of adhesive dots, the number of the second group of adhesive dots, the number of the first pressure needle, and the number of the second pressure needle are equal.

4. The method for pressing and curing interconnected photovoltaic modules with dense grid adhesive according to claim 1, characterized in that: The first group of adhesive dots and the second group of adhesive dots are staggered along the length or width of the battery cell.

5. An apparatus for pressing and curing interconnected photovoltaic modules with dense grid adhesive, characterized in that, A method for implementing the press-cured grid-connected photovoltaic module according to any one of claims 1-4 includes: frame; The pressure plate translation and lifting mechanism includes a first driving device, a mounting frame, and a second driving device. The first driving device is fixed on the frame and is used to drive the mounting frame to move along a first horizontal direction. The mounting frame and the frame slide in cooperation along the first horizontal direction. The second driving device is fixed on the mounting frame and is used to drive the pressure plate to move up and down in a vertical direction. The pressure plate is provided with a plurality of second pressure pins and a plurality of second hollowed-out portions. A carrier, wherein the carrier is provided with a plurality of first pressure pins corresponding one-to-one with the second pressure pins and a plurality of first hollow portions corresponding one-to-one with the second hollow portions; A horizontal transport mechanism includes a conveyor belt for moving the battery cells. The conveyor belt has a horizontal transport surface. The rear UV lamp is installed inside the conveyor belt. The surface of the conveyor belt is provided with light-transmitting holes, through which the light from the rear UV lamp can pass. A front light holder is provided for mounting the front UV lamp. The front light holder and the frame slide together along the first horizontal direction. A third driving device is fixed on the frame for driving the front light holder to slide relative to the frame. The front UV lamp is located above the pressure plate, and the light emitted by the front UV lamp can pass through the second cutout and the first cutout.

6. The apparatus for pressing and curing dense grid adhesive interconnected photovoltaic modules according to claim 5, characterized in that: It also includes a vehicle transfer mechanism, which includes a fourth drive device, a fixed frame, a movable seat, and a fifth drive device. The fourth drive device is fixed on the fixed frame and is used to drive the movable seat to slide relative to the fixed frame. The fifth drive device is fixed on the movable seat, and an electromagnet is fixed at the output end of the fifth drive device. The fifth drive device is used to drive the electromagnet to rise and fall, and the electromagnet is used to attract the vehicle.

7. The apparatus for pressing and curing dense grid adhesive interconnected photovoltaic modules according to claim 6, characterized in that: The carrier is fixed with a permanent magnet, and the electromagnet is able to attract the permanent magnet.

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