CN111463324A - Multi-main-grid photovoltaic cell and welding strip positioning equipment - Google Patents

Abstract

The invention provides a multi-busbar photovoltaic cell and welding strip positioning equipment, which includes a front-end pulling and positioning device and a tail-end positioning device. The front-end pulling and positioning device includes a first power mechanism, a sliding mechanism and a gripper mounted on the sliding mechanism. The first power mechanism drives the sliding mechanism to slide, so that the clamping claw holding the front end of the welding strip pulls the welding strip a predetermined distance, or the clamping claw and the welding strip are completely separated after releasing the welding strip. The tail positioning device includes a second power mechanism, a guide plate provided with a plurality of guide grooves, a plurality of guide blocks and a plurality of clamping blocks, each guide groove is oppositely provided with a guide block and a clamping block, and the welding tape is cut off Afterwards, the tail falls into the guide groove, and the second power mechanism drives the guide block and the clamping block to move toward or away from each other to clamp or release the welding tape in the guide groove, so that the welding tape and the multi-busbar photovoltaic cell are aligned. This positioning method is more accurate, ensures better subsequent string welding effect, reduces grid line resistance, and increases photoelectric conversion efficiency.

Description

Multi-busbar photovoltaic cells and ribbon positioning equipment

technical field

The invention relates to the field of photovoltaic technology, in particular to a multi-busbar photovoltaic cell and a welding ribbon positioning device.

Background technique

With the development of new energy, the photovoltaic industry is growing, and photovoltaic cells are also developing rapidly and changing constantly. The battery assembly is formed by welding a plurality of battery sheets to form a battery string by welding with a ribbon, and then welding the battery string through a bus welding. Nowadays, after the development and innovation of cells, MBB (multi-busbar) cells have become the mainstream, and their photoelectric conversion efficiency can be increased by 0.2%, reducing costs. Moreover, MBB cells have less silver paste and thinner silver wires, saving 25%-35% of front silver consumption. In order to reduce the influence of the resistance of photovoltaic modules, the more precise the connection between the welding ribbon and the cell, the better, and the higher the requirements for the positioning of the welding strip of the cell stringer.

The grid lines of the existing five-bus grid cells are relatively wide, and the welding strips used in the string welding are flat welding strips, which have more consumables, but the positioning is relatively easy, and the grid lines of the battery cells can be realized only by positioning the guide grooves. and precise positioning of flat ribbons.

The diameter of the round ribbon used when connecting MBB cells is about 0.35mm, which is thinner than the conventional flat ribbon. However, the main disadvantage of using the round welding tape is that when the multi-busbar photovoltaic cells are positioned through the guide groove, the position of the circular welding tape is easy to change during the process of pulling the welding tape, resulting in that the welding tape and the silver paste line of the cell cannot be accurately positioned. It reduces the welding quality of cells and ribbons, and increases the resistance of photovoltaic modules, thus affecting the photovoltaic conversion efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a multi-busbar photovoltaic cell and a welding strip positioning device, which solves the problem of inaccurate positioning between the existing multi-busbar photovoltaic cell and the welding strip.

In order to solve the above problems, the present invention provides a multi-busbar photovoltaic cell and welding ribbon positioning equipment, the multi-busbar photovoltaic cell and welding ribbon positioning equipment includes a front pulling positioning device and a tail positioning device. The front-end pulling and positioning device includes a first power mechanism, a sliding mechanism and a clamping claw, the clamping claw is installed on the sliding mechanism, and the clamping claw can operably clamp or release the front end of the welding strip; the first power mechanism drives the sliding mechanism to slide to make the clamping The clamping jaw at the front end of the welding strip pulls the welding strip a predetermined distance, or the clamping jaw releases the front end of the welding strip and completely disengages the welding strip. The tail positioning device includes a second power mechanism, a guide plate, a plurality of guide blocks and a plurality of clamping blocks, the guide plate is provided with a plurality of spaced guide grooves, and one end of each guide groove is provided with a guide block and A clamping block, after the welding strip is cut off by the cutting device, the tail falls into the guide groove of the guide plate, and the second power mechanism drives the guide block and the clamping block to move toward or away from each other to clamp or release the corresponding guide groove. of the ribbon, so that the ribbon and the multi-busbar photovoltaic cell are aligned.

According to an embodiment of the present invention, the first power mechanism is a motor, and the second power mechanism is an air cylinder.

According to an embodiment of the present invention, the tail positioning device further includes a buffer, and the buffer is installed on the guide plate to adjust the clamping position of the welding tape.

According to an embodiment of the present invention, the sliding mechanism includes a sliding rail and an adjustable cantilever, the adjustable cantilever is slidably mounted on the sliding rail, and the clamping jaw is mounted on the adjustable cantilever.

According to an embodiment of the present invention, the front-end pulling and positioning device includes a clamping jaw base plate, and the clamping jaw is mounted on the sliding mechanism through the clamping jaw base plate.

According to an embodiment of the present invention, the number of the clamping jaws is multiple, and all the clamping jaws are sequentially arranged on the clamping jaw bottom plate to clamp a plurality of welding strips at one time.

According to an embodiment of the present invention, the tail positioning device includes an installation base plate, a support plate, and a guide rail, the support plate is directly or indirectly installed on the installation base plate, and the guide plate is slidably installed on the support plate through the guide rail.

According to an embodiment of the present invention, the multi-busbar photovoltaic cell and welding ribbon positioning equipment includes a robot swinging mechanism, and the robot swinging mechanism is used for positioning and swinging the multi-busbar photovoltaic cell.

According to an embodiment of the present invention, the multi-busbar photovoltaic cell and the welding tape positioning device include a cutting device, and the cutting device is used for cutting the welding tape.

Compared with the prior art, the technical solution has the following advantages:

The multi-busbar photovoltaic cell and the welding ribbon positioning device provided by the present invention clamp the front end of the welding ribbon through the clamping jaws of the front-end pulling positioning device, and then drive the sliding mechanism to move through the first driving mechanism, thereby driving the clamping jaws to hold the welding ribbon. Pull a predetermined distance from the position of the welding strip transmission line, and then the welding strip is cut by the cutting device, the tail of the welding strip falls into the guide groove of the tail positioning device to limit the position, and the second power mechanism drives the guide block and the clamping block to face each other. movement to clamp the ribbon falling into the guide groove. After the welding tape is clamped and fixed, the position of the welding tape is fixed, and it is not easy to change. Afterwards, it is only necessary to swing the multi-busbar photovoltaic cells to position the grid lines of the multi-busbar photovoltaic cells and the welding strip, and then release the front end of the welding strip through the clamping jaw, and drive the guide block and clamp through the second power mechanism. Block to release the tail of the welding tape, so that the welding tape is aligned and placed on the multi-busbar photovoltaic cell to realize the alignment and positioning of the two. The multi-bus grid photovoltaic cells and the welding ribbon positioning equipment provided by the present invention can well fix the welding ribbon, so that the welding ribbon is not easily displaced and the position is not easily changed, and the welding ribbon can be adjusted by fixing the position of the welding ribbon. Compared with the traditional positioning method, this method is more accurate, which ensures better string welding effect of the cells in the subsequent production process and reduces the grid resistance. Thereby increasing the photoelectric conversion efficiency.

Description of drawings

1 is a top view of a multi-busbar photovoltaic cell and a welding ribbon positioning device provided by an embodiment of the present invention;

2 is a top view of a front-end pulling and positioning device of a multi-busbar photovoltaic cell and a welding ribbon positioning device provided by an embodiment of the present invention;

3 is a schematic three-dimensional structural diagram of a tail positioning device of a multi-busbar photovoltaic cell and a welding ribbon positioning device provided by an embodiment of the present invention;

FIG. 4 is a side view of the tail positioning device shown in FIG. 3 .

Detailed ways

The following description is only used to disclose the present invention to enable those skilled in the art to practice the present invention. The embodiments in the following description are only examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and others without departing from the spirit and scope of the invention.

As shown in FIG. 1 , the present invention provides a multi-busbar photovoltaic cell and welding ribbon positioning equipment, which is used for positioning both the multi-busbar photovoltaic cell and the welding ribbon during the manufacturing process of the battery module, so as to facilitate subsequent In the process, the two are welded in series. Specifically, the multi-busbar photovoltaic cell and welding ribbon positioning equipment includes a front-end pulling and positioning device 10 and a tail-end positioning device 20 .

The front-end pulling and positioning device 10 includes a first power mechanism 11 , a sliding mechanism 12 and a clamping jaw 13 . The clamping jaw 13 is mounted on the sliding mechanism 12, and the clamping jaw 13 is operable to clamp or release the front end of the welding strip. The first power mechanism 11 drives the sliding mechanism 12 to slide, so that the clamping jaw 13 holding the front end of the welding ribbon pulls the welding ribbon a predetermined distance, or the clamping jaw 13 releases the front end of the welding ribbon and completely disengages the welding ribbon.

Further, the first power mechanism 11 is a motor. In other embodiments, the first power mechanism 11 may also be other suitable power mechanisms, for example, the first power mechanism 11 is an air cylinder.

The sliding mechanism 12 includes a sliding rail 121 and an adjustable cantilever 122 . The adjustable cantilever 122 is slidably mounted on the sliding rail 121 , and the clamping jaw 13 is mounted on the adjustable cantilever 122 . Driven by the first power mechanism 11 , the adjustable cantilever arm 122 slides along the slide rail 121 , so that the adjustable cantilever arm 122 drives the gripper 13 to slide along the slide rail 121 .

The front-end pulling and positioning device 10 further includes a clamping jaw base plate 14 , and the clamping jaw 13 is mounted on the adjustable cantilever 122 of the sliding mechanism 12 through the clamping jaw base plate 14 . The number of the clamping jaws 13 is multiple, and all the clamping jaws 13 are arranged in sequence on the clamping jaw base plate 14 to clamp a plurality of welding strips at one time, thereby improving the production efficiency.

The tail positioning device 20 includes a guide plate 21 , a second power mechanism 22 , a plurality of guide blocks 23 and a plurality of clamping blocks 24 . The guide plate 21 is provided with a plurality of spaced guide grooves 2101, and one end of each guide groove 2101 is provided with a guide block 23 and a clamping block 24 which are oppositely disposed. That is to say, the numbers of the guide blocks 23 and the clamping blocks 24 are the same and correspond one-to-one, and each guide block 23 and one of the clamping blocks 24 are disposed opposite to one end of one of the guide grooves 2101 . For one guide groove 2101 , the guide block 23 and the clamping block 24 are respectively located on the two side edges of the same end of the guide groove 2101 . Since all the guide grooves 2101 are arranged in parallel and spaced apart, all the guide blocks 23 and the clamping blocks 24 are located at the same end of the guide grooves 2101 . After the welding tape held by the front-end pulling and positioning device 10 is cut by the cutting device, the tail of the welding tape falls into the guide groove 2101 of the guide plate 21 . The second power mechanism 22 drives the guide block 22 and the clamping block 23 to move toward or away from each other to clamp or release the welding tape located in the corresponding guide groove 2101 , so that the welding tape and the multi-busbar photovoltaic cell are aligned.

The second power mechanism 22 is an air cylinder. In other embodiments, the second power mechanism 22 may also be other suitable power mechanisms, for example, the second power mechanism 22 is a motor.

The tail positioning device 20 further includes an installation base plate 25 , a support plate 26 and a guide rail 27 . The support plate 26 is directly or indirectly installed vertically on the installation base plate 25 . The number of the support plates 26 is two. The two support plates 26 stand vertically on both sides of the mounting base plate 25 respectively. The two sides of the guide plate 21 are respectively erected on top of the two support plates 26 . In this way, the guide plate 21 slides along the guide rail 24 under the driving of the second power mechanism 22 .

The tail positioning device 20 further includes a buffer 28, and the buffer 28 is mounted on the guide plate 21 through the buffer mounting plate to adjust the clamping position of the welding tape. In practical applications, according to different kinds of welding strips and different lengths of the welding strips, the position where the welding strip is clamped by the guide block 23 and the clamping block 24 needs to be adjusted adaptively. Therefore, by the buffer 28 attached to the bottom of the guide plate 21, the position where both the guide block 23 and the clamp block 24 clamp the welding tape can be adjusted left and right.

The tail positioning mechanism also includes two transition plates 291, a slider fixing plate 292, a plurality of positioning adjustment blocks 293, a lateral adjustment block 294, a lateral guide mounting plate 295, and a tension block 296, wherein the two transition plates 291 and the slider are fixed The function of the plate 292 is to link the slide rail of the second power mechanism 22 with the fixed piece of the clamping block 24 and the guide block 24 to facilitate lateral movement. There is an elastic mechanism in the positioning adjustment block 293 to ensure that the clamping block 24 does not loosen the welding ribbon. The lateral adjustment block 294 and the lateral guide mounting plate 295 can adjust the guide plate 21 and the entire tail positioning device 20 so that they can only move laterally, so as to ensure the precise positioning of the ribbon and the battery. The adjusting action of the tensioning block 296 can pull or push the adjusting guide plate 21 .

The device for positioning the multi-busbar photovoltaic cells and the welding strip further includes a robot swinging mechanism (not shown in the figure), and the robot swinging mechanism is used for positioning and swinging the multi-busbar photovoltaic cells.

The multi-bus grid photovoltaic cell and the welding ribbon positioning device further include a welding ribbon transmission line 30, and the welding ribbon transmission line 30 is used for conveying the welding ribbon.

The multi-busbar photovoltaic cell and the welding ribbon positioning equipment further includes a cutting device 40, and the cutting device 40 is used for cutting the welding ribbon.

When the multi-busbar photovoltaic cell and the welding strip positioning device are in operation, the front end pulls the clamping jaw 13 of the positioning device 10 to clamp the welding strip from the welding strip transmission line 30, and the first power mechanism 11 drives the sliding mechanism 12 to slide, thereby After the clamping jaws 13 are driven to pull the welding strip by a predetermined distance, the cutting device 40 cuts the welding strip, so that the tails of the welding strip fall into the guide grooves 2101 of the guide plate 21 one by one correspondingly. And as the first power mechanism 11 in the front-end pulling and positioning device 10 is driven, the front-end pulling and positioning device 10 moves to a designated position, and after the welding belt is pulled to the designated position, the second power mechanism 22 of the tail positioning device 20 starts to act. Pushing out makes the guide block 23 and the clamping block 24 that are arranged opposite move toward each other, so that the guide block 23 and the clamping block 24 clamp and fix the tail of the welding tape.

After the tail of the welding tape is clamped and positioned, the multi-busbar photovoltaic cell is positioned and oscillated by the robot swing mechanism, so that the grid lines on the multi-busbar photovoltaic cell are aligned with the clamped and fixed welding tape at both ends. . After the multi-busbar photovoltaic cells are oscillated, the clamping jaws 13 of the front-end pulling and positioning device 10 are released to release the front end of the ribbon, and the first power mechanism 11 of the front-end pulling and positioning device 10 drives the sliding mechanism 12 to drive the clamping 13 to continue. Move forward a predetermined distance to ensure that the front end of the ribbon is completely free from the clamping jaws 13 and positioned on the grid lines of the multi-busbar photovoltaic cell. Then the second power mechanism 22 of the tail positioning device 20 works in reverse, so that the oppositely arranged guide blocks 23 and clamping blocks 24 move opposite to each other, thereby releasing the tail of the welding tape located in the corresponding guide groove 2101, so that the tail of the welding tape Positioned on the grid line of the multi-busbar photovoltaic cell, so far, the positioning of the welding tape and the multi-busbar photovoltaic cell is completed.

Compared with the original conventional 5-grid photovoltaic cell positioning equipment, the multi-bus grid photovoltaic cell and welding ribbon positioning equipment provided by the present invention is more accurate in positioning between the welding ribbon and the grid lines of the multi-bus grid photovoltaic cells. To ensure better subsequent welding effect, reduce grid resistance, thereby increasing photoelectric conversion efficiency.

It should be understood by those skilled in the art that the embodiments of the present invention shown in the above description and the accompanying drawings are only examples and do not limit the present invention. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention may be subjected to any variations and modifications without departing from the principles.

Claims (9)

1. A multi-busbar photovoltaic cell and a welding strip positioning device, characterized in that, comprising: The front-end pulling and positioning device includes a first power mechanism, a sliding mechanism and a clamping claw, the clamping claw is mounted on the sliding mechanism, and the clamping claw is operable to clamp or release the front end of the welding tape; the first power mechanism The sliding mechanism is driven to slide, so that the clamping claw holding the front end of the welding strip pulls the welding strip a predetermined distance, or the clamping claw releases the leading end of the welding strip and completely separates from the welding strip; The tail positioning device includes a second power mechanism, a guide plate, a plurality of guide blocks and a plurality of clamping blocks, the guide plate is provided with a plurality of spaced guide grooves, and one end of each of the guide grooves is provided with oppositely arranged One of the guide blocks and one of the clamping blocks, after the welding tape is cut off by the cutting device, the tail falls into the guide groove of the guide plate, and the second power mechanism drives the guide block and the The clamping blocks move toward or away from each other to clamp or release the soldering strips located in the corresponding guide grooves, so that the soldering strips and the multi-busbar photovoltaic cell sheets are aligned. 2 . The multi-busbar photovoltaic cell and welding ribbon positioning device according to claim 1 , wherein the first power mechanism is a motor, and the second power mechanism is an air cylinder. 3 . 3 . The multi-busbar photovoltaic cell and ribbon positioning device according to claim 1 , wherein the tail positioning device further comprises a buffer, and the buffer is mounted on the guide plate to clamp the ribbon. 4 . position to adjust. 4. The multi-busbar photovoltaic cell and welding ribbon positioning device according to claim 1, wherein the sliding mechanism comprises a sliding rail and an adjustable cantilever, the adjustable cantilever is slidably installed on the sliding rail, the jaws are mounted on the adjustable cantilever. 5 . The multi-busbar photovoltaic cell and ribbon positioning device according to claim 1 , wherein the front-end pulling and positioning device comprises a clamping jaw base plate, and the clamping jaw is mounted on the clamping jaw base plate through the clamping jaw base plate. 6 . sliding mechanism. 6 . The multi-busbar photovoltaic cell and welding ribbon positioning device according to claim 5 , wherein the number of the clamping jaws is multiple, and all the clamping jaws are sequentially arranged on the clamping jaw bottom plate, 6 . Holds multiple ribbons at once. 7 . The multi-busbar photovoltaic cell and ribbon positioning device according to claim 1 , wherein the tail positioning device comprises a mounting base plate, a support plate, and a guide rail, and the support plate is directly or indirectly installed on the The installation bottom plate is slidably installed on the support plate through the guide rail. 8. The multi-busbar photovoltaic cell and welding ribbon positioning device according to any one of claims 1-7, wherein the multi-busbar photovoltaic cell and welding ribbon positioning device comprises a robot swinging mechanism, and the The robot swinging mechanism is used to position and swing the multi-busbar photovoltaic cells. 9. The multi-busbar photovoltaic cell and welding ribbon positioning equipment according to any one of claims 1-7, wherein the multi-busbar photovoltaic cell and welding ribbon positioning equipment comprises a cutting device, and the cutting device Used to cut ribbons.

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