An apparatus for producing a photovoltaic solder strip

Abstract

The utility model relates to photovoltaic technical field, specifically disclose a kind of photovoltaic welding strip's production device, comprising: insulation glue soaking liquid tank, inside is filled with insulation glue solution;Welding strip clamping device, with several interval setting clamping jaw, clamping jaw can clamp or release photovoltaic welding strip, and clamping jaw is suitable for when clamping photovoltaic welding strip to the circumferential wrapping of part photovoltaic welding strip, to make the photovoltaic welding strip being wrapped after immersion insulation glue soaking liquid tank is not soaked insulation glue solution, the photovoltaic welding strip not being wrapped after immersion insulation glue soaking liquid tank soaks insulation glue solution.The utility model is clamped and wrapped to photovoltaic welding strip by the clamping jaw on welding strip clamping device, when the photovoltaic welding strip clamped by clamping jaw is conveyed to insulation glue soaking liquid tank, only make the part of photovoltaic welding strip not clamped soak insulation glue solution, realize the discontinuous insulation of photovoltaic welding strip, the photovoltaic welding strip after production is welded in battery piece, and battery piece itself does not need to be insulated, and cost is lower, beneficial to mass production.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically to a production device for photovoltaic welding strips. Background Technology

[0002] With the continuous development of photovoltaic energy technology, reducing the cost of photovoltaic electricity is a key aspect of current energy strategies. Current technology utilizes solder ribbons to connect multiple solar cells into a single unit, which is then encapsulated into a battery module through processes such as laying and lamination.

[0003] Current technology uses regular round wire solder strips, and insulation issues must be considered in the welding of full back-contact batteries. In back-contact batteries, both the positive and negative electrodes are located on the back side, with the positive and negative sub-grids spaced apart. The positive and negative main grids of the solder strip are also spaced apart. The positive sub-grids are connected to the positive main grid, and the negative sub-grids are connected to the negative main grid. The positive sub-grids are disconnected from the negative main grid, but the spacing is very small. If there is no insulation, welding the negative electrode solder strip will cause contact between the solder strip and the positive and negative electrodes, leading to a short circuit. Similarly, welding the positive electrode solder strip will cause magnetic problems. Generally, the battery cell itself is insulated, but this requires a large amount of insulating adhesive, resulting in high costs. Another option is to insulate the battery cell with an insulating film before welding the back-contact battery cell, but this requires a flexible conductive backsheet, which is costly and not conducive to mass production. Utility Model Content

[0004] This utility model provides a photovoltaic welding ribbon production device to solve the problem that the current insulation treatment of solar cells is costly and not conducive to mass production, so as to quickly produce intermittently insulated photovoltaic welding ribbons.

[0005] This utility model provides a photovoltaic welding strip production device, comprising:

[0006] An insulating adhesive soaking tank, which contains insulating adhesive liquid;

[0007] A welding strip clamping device has a number of spaced-apart grippers. The grippers are capable of gripping or releasing photovoltaic welding strips. The grippers are adapted to circumferentially wrap a portion of the photovoltaic welding strip when clamping it, so that the wrapped photovoltaic welding strip is not soaked in the insulating adhesive soaking solution after being immersed in the insulating adhesive soaking solution, and the unwrapped photovoltaic welding strip is soaked in the insulating adhesive soaking solution after being immersed in the insulating adhesive soaking solution.

[0008] To further optimize the technical solution, the linear array of grippers has several rows and several columns.

[0009] The technical solution is further optimized so that the position of each row of grippers corresponds to the position of the PAD point of the battery cell, and the number of grippers in each row corresponds to the number of PAD points of the battery cell.

[0010] The technical solution is further optimized so that the number of grippers in each row corresponds to the number of main grids of the battery cell.

[0011] The technical solution is further optimized so that the size of the gripper is between 0.1-1.0 mm;

[0012] And / or the insulating adhesive soaking tank is an uncovered square tank with dimensions of 300×300×80mm.

[0013] Further optimization of the technical solution also includes:

[0014] The drying device is located next to the insulating adhesive soaking tank and is suitable for drying the photovoltaic welding strip after it has been soaked in the insulating adhesive.

[0015] The drying device further optimizes the technical solution and includes:

[0016] Drying chamber;

[0017] Several infrared heating tubes are respectively installed on the drying chamber.

[0018] Further optimization of the technical solution also includes:

[0019] A moving device, wherein the welding strip clamping device is mounted on the moving device, and the moving device is adapted to drive the welding strip clamping device to move up and down and / or move in a horizontal plane.

[0020] Further optimization of the technical solution also includes:

[0021] Several gripper self-cleaners are provided on each gripper, which are adapted to perform circumferential cutting between the gripper and the photovoltaic ribbon so as to separate the gripper from the photovoltaic ribbon.

[0022] To further optimize the technical solution, the production device is set inside a welding machine for string welding of full-back contact electrode batteries.

[0023] The beneficial effects of this utility model are as follows:

[0024] The photovoltaic welding strip production device provided by this utility model uses clamps on a welding strip clamping device to hold and wrap the photovoltaic welding strip. When the photovoltaic welding strip held by the clamps is transported to the insulating adhesive soaking tank, the clamped parts of the photovoltaic welding strip are not soaked in the insulating adhesive; only the unclamped parts of the photovoltaic welding strip are soaked in the insulating adhesive, thus achieving intermittent insulation of the photovoltaic welding strip. When the produced photovoltaic welding strip is welded to solar cells, the solar cells themselves do not need to be insulated. Furthermore, the photovoltaic welding strip does not require a flexible conductive backsheet, resulting in lower costs and facilitating mass production. This utility model can be implemented at the customer's end, allowing customers to customize the required specifications based on the solar cell mesh pattern. Moreover, this device can select an insulation layer that meets the customer's specific insulation needs. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the photovoltaic welding strip production device provided by this utility model;

[0027] Figure 2 A schematic diagram of the welding strip clamping device in the photovoltaic welding strip production apparatus provided by this utility model;

[0028] Figure 3 A bottom view of the welding strip clamping device in the photovoltaic welding strip production apparatus provided by this utility model;

[0029] Figure 4 A schematic diagram of the insulating adhesive soaking tank in the photovoltaic welding strip production device provided by this utility model;

[0030] Figure 5 A schematic diagram of the drying device in the photovoltaic welding strip production apparatus provided by this utility model;

[0031] Figure 6 This utility model Figure 1 A magnified view of part A in the middle.

[0032] Figure label:

[0033] 1. Welding strip clamping device; 11. Clamping claws; 2. Insulating adhesive soaking tank; 3. Drying device; 4. Clamping claw self-cleaner; 5. Moving device; 6. Battery cell position. Detailed Implementation

[0034] Photovoltaic solder ribbon, also known as tin-plated copper ribbon or tin-coated copper ribbon, is divided into busbars and interconnects. It is used to connect photovoltaic module cells, playing a crucial role in conductivity and energy concentration. Currently, regular round wire solder ribbon is used. In full back-contact cell welding, insulation issues must be considered. Generally, the cell itself is insulated, but this requires a large amount of insulating adhesive, resulting in high costs. Another option is to insulate the cells with an insulating film before back-contact welding, but this requires a flexible conductive backsheet, which is costly and not conducive to mass production. Furthermore, current photovoltaic solder ribbons are all integral conductive ribbons, without any interruptions in insulation.

[0035] To address the current issues of high cost and hindering mass production in insulating solar cells, this invention provides a photovoltaic welding strip production device capable of rapidly producing intermittently insulated photovoltaic welding strips. The device includes: an insulating adhesive soaking tank filled with insulating adhesive; and a welding strip clamping device with several spaced-apart grippers capable of gripping or releasing the photovoltaic welding strip. The grippers are adapted to circumferentially wrap a portion of the photovoltaic welding strip while clamping it, ensuring that the wrapped photovoltaic welding strip is not immersed in the insulating adhesive after being immersed in the soaking tank, while the unwrapped photovoltaic welding strip is immersed in the insulating adhesive after being immersed in the soaking tank.

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0037] refer to Figure 1 This embodiment provides a photovoltaic welding strip production device, which is installed in a welding machine for welding full back contact electrode battery strings and is applied to the welding strip stretching and traction stage of the back contact welding machine.

[0038] refer to Figure 1 The photovoltaic welding strip production apparatus of this embodiment includes: an insulating adhesive soaking tank 2 and a welding strip clamping device 1.

[0039] Insulating adhesive soaking tank 2 contains insulating adhesive liquid.

[0040] The welding strip clamping device 1 has a number of spaced-apart grippers 11. The grippers 11 are capable of gripping or releasing photovoltaic welding strips, and the grippers are adapted to circumferentially wrap a portion of the photovoltaic welding strip when clamping it, so that the wrapped photovoltaic welding strip is not soaked in the insulating adhesive soaking solution tank 2 after being immersed in the insulating adhesive soaking solution tank 2, and the unwrapped photovoltaic welding strip is soaked in the insulating adhesive after being immersed in the insulating adhesive soaking solution tank 2.

[0041] The photovoltaic welding strip production apparatus provided in this embodiment uses the clamps on the welding strip clamping device 1 to clamp and wrap the photovoltaic welding strip. When the photovoltaic welding strip held by the clamps is transported to the insulating adhesive soaking tank 2, the clamped part of the photovoltaic welding strip is not soaked in the insulating adhesive. Only the unclamped part of the photovoltaic welding strip is soaked in the insulating adhesive, thereby achieving intermittent insulation of the photovoltaic welding strip. When the photovoltaic welding strip is welded to the solar cell, it is not necessary to insulate the solar cell itself. Moreover, the photovoltaic welding strip does not need to use a flexible conductive backplate, resulting in lower cost and facilitating mass production.

[0042] In some embodiments, the linear array of grippers has several rows and several columns. (See reference) Figure 2 and Figure 3 In this embodiment, the grippers in each row are spaced apart, and the grippers in each row are spaced apart.

[0043] In some embodiments, the position of each row of grippers corresponds to the position of the PAD points on the battery cell, the number of grippers in each row corresponds to the number of PAD points on the battery cell, and the number of grippers in each row corresponds to the number of main grids on the battery cell. Thus, the number and position of the grippers are adjusted according to the battery cell pattern.

[0044] In some embodiments, the size of the grippers is between 0.1 and 1.0 mm, and the photovoltaic ribbon is fully wrapped by the gripping portion to prevent the insulating adhesive from completely covering the ribbon. The grippers are electromagnetically controlled; they are open when power is off and closed when power is on. (Reference) Figure 4 The insulating adhesive soaking solution tank 2 is a standard stainless steel open-top square tank with dimensions of 300×300×80mm. In this embodiment, the specifications of the grippers and the insulating adhesive soaking solution tank 2 are defined, and the grippers and the insulating adhesive soaking solution tank 2 can be manufactured according to these specifications.

[0045] In some embodiments, the photovoltaic welding ribbon production apparatus further includes a drying device 3, which is disposed beside the insulating adhesive soaking tank 2 and is suitable for drying the photovoltaic welding ribbon after soaking in the insulating adhesive. In this embodiment, the grippers can transport the photovoltaic welding ribbon soaked in the insulating adhesive to the drying device 3, and the drying device 3 can quickly dry the insulating adhesive on the photovoltaic welding ribbon. Compared with natural air drying, the production speed is faster and more conducive to the mass production of photovoltaic welding ribbons.

[0046] In some embodiments, the drying device 3 includes a drying chamber and infrared heating tubes. The drying chamber may be an open-top structure or other structures; its specific shape and structure are not limited here. Several infrared heating tubes are provided, each disposed on the drying chamber. The heat emitted by the infrared heating tubes can quickly dry the insulating adhesive on the photovoltaic welding ribbon. (Reference) Figure 5 More specifically, the infrared heating tubes are installed on the inner bottom wall and / or inner side wall of the drying chamber, and can be installed according to the actual situation. Furthermore, multiple rows of infrared heating tubes can be arranged linearly at intervals.

[0047] In some embodiments, the photovoltaic ribbon production apparatus further includes a moving device 5, on which a ribbon clamping device 1 is disposed. The moving device 5 is adapted to drive the ribbon clamping device 1 to move up and down and / or move in a horizontal plane. In this embodiment, the moving device 5 can drive the ribbon clamping device 1 to move into the insulating adhesive soaking tank 2, the drying device 3, and the cell position 6.

[0048] In some embodiments, the moving device 5 includes a lifting mechanism, a lateral moving mechanism, and a longitudinal moving mechanism. The lifting mechanism includes a cylinder or hydraulic cylinder, capable of driving the welding strip clamping device 1 to perform lifting actions. The lateral moving mechanism includes a first guide rail, a first lead screw, a first lead screw nut, a first slider, and a first motor. The first guide rail is connected to the moving end of the longitudinal moving mechanism. The first lead screw is rotatably mounted on the first guide rail. The first lead screw nut is adapted to the first lead screw, and the lifting mechanism is located at the bottom end of the first lead screw nut. The output shaft end of the first lead screw is connected to the first motor. The longitudinal moving mechanism includes a second guide rail, a second lead screw, a second lead screw nut, a second slider, and a second motor. The second guide rail is fixedly mounted on the frame. The second lead screw is rotatably mounted on the second guide rail. The second lead screw nut is adapted to the second lead screw, and the first guide rail of the lateral moving mechanism is fixed to the bottom end of the second lead screw nut. The output shaft end of the second lead screw is connected to the second motor. When the longitudinal moving mechanism in this embodiment is running, it can drive the welding strip clamping device 1 and the photovoltaic welding strip to move longitudinally; when the transverse moving mechanism is running, it can drive the welding strip clamping device 1 and the photovoltaic welding strip to move laterally; when the lifting mechanism is running, it can drive the welding strip clamping device 1 and the photovoltaic welding strip to lift.

[0049] In some embodiments, reference Figure 6 The photovoltaic welding ribbon production apparatus also includes a gripper self-cleaner 4, located above the grippers and rotating left and right around the welding ribbon to separate the insulating layer from the grippers. Several gripper self-cleaners 4 are provided, with one for each gripper. In this embodiment, the gripper self-cleaner 4 is adapted to perform circumferential cutting between the grippers and the photovoltaic welding ribbon after each drying of the welding ribbon's insulating coating, thereby separating the grippers from the photovoltaic welding ribbon and breaking the bond between the insulating adhesive and the grippers. Specifically, the gripper self-cleaner 4 is a rotating blade device, with its blade portion located above the grippers and driven to rotate by a motor. When it is necessary to separate the connection between the insulating layer and the grippers, the rotating blade device is activated, and the blade rotates around the welding ribbon, cutting the bonded portion between the insulating adhesive and the grippers, thus achieving the self-cleaning function of the grippers.

[0050] In some embodiments, the gripper self-cleaner 4 includes a self-cleaning blade mounted on the gripper, which is movable along the direction of wrapping the photovoltaic welding ribbon. The gripper self-cleaner 4 is implemented such that the self-cleaning blade can rotate around the welding ribbon to cut off the insulating adhesive after adjusting its stroke.

[0051] The specific production process for intermittently insulated photovoltaic welding strips in this embodiment is as follows:

[0052] S1. The welding strip clamping device 1 clamps the photovoltaic welding strip. The number of photovoltaic welding strips clamped in each row of the welding strip clamping device is determined according to the number of PAD points of the solar cell, and the position and number are in a one-to-one correspondence with the PAD points of the solar cell. The number of jaws in each row of the welding strip clamping device is determined according to the number of main busbars of the solar cell, and the position and number of photovoltaic welding strips clamped can be adjusted according to the solar cell pattern.

[0053] S2. The moving device 5 drives the welding strip clamping device 1 to descend, and moves the welding strip clamping device 1 into the insulating adhesive soaking tank 2 for soaking. The soaking time is 1-5 seconds.

[0054] S3. The moving device 5 drives the welding strip clamping device 1 to rise and moves the welding strip clamping device 1 to the drying device 3. The drying device 3 dries the insulating adhesive liquid covering the surface of the photovoltaic welding strip for 1-2 seconds.

[0055] S4. The gripper self-cleaning device is activated, disconnecting the insulating adhesive from the gripper, making it easier for the gripper to release the photovoltaic welding ribbon.

[0056] S5. The moving device 5 drives the welding ribbon clamping device 1 to move to the cell position 6, releases the clamps, and places the photovoltaic welding ribbon on top of the cell for welding; or the photovoltaic welding ribbon is placed on the cell position first, and then the cell is placed. The non-insulated section of the welding ribbon corresponds one-to-one with the PAD point of the cell, thereby realizing welding.

[0057] The aforementioned photovoltaic welding strip production equipment can be implemented at the customer's site, allowing customers to customize the required specifications based on the battery mesh pattern. Furthermore, this equipment can select an insulation layer that meets the customer's specific insulation needs based on the desired insulation effect.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A photovoltaic welding strip production apparatus, characterized in that, include: Insulating adhesive soaking tank (2), which contains insulating adhesive liquid; The welding strip clamping device (1) has a number of spaced-apart claws. The claws are capable of clamping or releasing the photovoltaic welding strip. The claws are adapted to circumferentially wrap a portion of the photovoltaic welding strip when clamping it, so that the wrapped photovoltaic welding strip is not soaked in the insulating adhesive soaking liquid tank (2) after being immersed in the insulating adhesive soaking liquid tank (2), and the unwrapped photovoltaic welding strip is soaked in the insulating adhesive after being immersed in the insulating adhesive soaking liquid tank (2).

2. The photovoltaic ribbon production apparatus according to claim 1, characterized in that, The linear array of grippers has several rows and several columns.

3. The photovoltaic ribbon production apparatus according to claim 2, characterized in that, The position of each row of grippers corresponds to the position of the PAD point on the battery cell, and the number of grippers in each row corresponds to the number of PAD points on the battery cell.

4. The photovoltaic ribbon production apparatus according to claim 2, characterized in that, The number of grippers in each row corresponds to the number of main grids of the solar cell.

5. The photovoltaic ribbon production apparatus according to claim 1, characterized in that, The size of the gripper is between 0.1 and 1.0 mm; And / or the insulating adhesive soaking tank (2) is an open square tank with dimensions of 300×300×80mm.

6. The photovoltaic ribbon production apparatus according to claim 1, characterized in that, Also includes: The drying device (3) is set next to the insulating adhesive soaking tank (2) and is suitable for drying the photovoltaic welding strip after soaking in the insulating adhesive.

7. The photovoltaic ribbon production apparatus according to claim 6, characterized in that, The drying device (3) includes: Drying chamber; Several infrared heating tubes are respectively installed on the drying chamber.

8. The photovoltaic ribbon production apparatus according to claim 1, characterized in that, Also includes: The moving device (5) is provided with the welding strip clamping device (1) mounted on the moving device (5). The moving device (5) is adapted to drive the welding strip clamping device (1) to move up and down and / or move in the horizontal plane.

9. The photovoltaic ribbon production apparatus according to any one of claims 1-8, characterized in that, Also includes: Several gripper self-cleaners (4) are provided on each gripper and are adapted to perform circumferential cutting between the gripper and the photovoltaic ribbon so as to separate the gripper from the photovoltaic ribbon.

10. The photovoltaic ribbon production apparatus according to any one of claims 1-8, characterized in that, The production equipment is installed inside a welding machine for string welding of batteries with full back contact electrodes.

Images