CN217965485U

CN217965485U - Series welding machine and photovoltaic module

Info

Publication number: CN217965485U
Application number: CN202222342146.7U
Authority: CN
Inventors: 郭亮; 陶武松; 王路闯; 彭莹莹; 秦年年
Original assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Current assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-12-06
Anticipated expiration: 2032-09-01

Abstract

The application discloses a series welding machine and a photovoltaic module, and relates to the technical field of photovoltaics, wherein the series welding machine comprises a string dividing device for dividing a solar cell string into a plurality of solar cells, and every two adjacent solar cells are connected through a plurality of interconnection strips; the string separating device comprises an upper pressing mechanism and a bearing mechanism, the upper pressing mechanism is located above the solar cell string and used for cutting and partially flattening the interconnection strips, and the bearing mechanism is located below the solar cell string and used for bearing the interconnection strips. The solar cell string flattening device is used for flattening the interconnection bar part while dividing the solar cell string, the thickness of the interconnection bar and the bus bar superposition part is reduced, the thinning of a photovoltaic module is further realized, the risk that a solder strip tin nail punctures an adhesive film is reduced, and the performance of the photovoltaic module is guaranteed.

Description

Series welding machine and photovoltaic module

Technical Field

The application relates to the technical field of photovoltaics, in particular to a series welding machine and a photovoltaic module.

Background

The trend towards thinning photovoltaic modules is also becoming more and more evident for the purpose of reducing weight and cost.

At present, the thinning of a photovoltaic module is mainly concentrated on the thinning of a photovoltaic adhesive film and a back plate, the power of the photovoltaic module can be influenced if the welding wire diameter and a bus bar are continuously thinned, the thicknesses of the thinned adhesive film and the thinned back plate at the welding positions of the head, the tail and the middle bus bar of the photovoltaic module are thicker, obvious salient points exist after the lamination, the appearance of the photovoltaic module is influenced, and after the adhesive film is thinned, a tin nail on the thicker position of a welding strip can also possibly puncture the adhesive film to cause the abnormity of the module and influence the performance of the photovoltaic module.

Disclosure of Invention

In view of this, this application provides a stringer and photovoltaic module for when dividing the cluster solar cell cluster flatten the interconnection bar part, reduced the thickness of interconnection bar and busbar stack part, and then realized photovoltaic module's attenuate, reduced solder strip tin nail puncture glued membrane risk simultaneously, guaranteed photovoltaic module's performance.

The application has the following technical scheme:

in a first aspect, the present application provides a series welding machine, which includes a string dividing device for dividing a solar cell string into strings, wherein the solar cell string includes a plurality of solar cells, and two adjacent solar cells are connected by a plurality of interconnecting bars; the string separating device comprises an upper pressing mechanism and a bearing mechanism, the upper pressing mechanism is located above the solar cell string and used for cutting and partially flattening the interconnection strips, and the bearing mechanism is located below the solar cell string and used for bearing the interconnection strips.

Optionally, wherein:

the upper pressing mechanism comprises a string cutter, a first flattening structure and a second flattening structure, wherein the first flattening structure and the second flattening structure are respectively arranged on two opposite sides of the string cutter; the extending direction of the string cutter is vertical to the extending direction of the interconnecting strips.

Optionally, wherein:

the first flattening structure comprises a plurality of first flattening parts which correspond to the interconnection strips one by one, and the extending direction of each first flattening part is the same as that of the corresponding interconnection strip; the second flattening structure comprises a plurality of second flattening parts which correspond to the interconnection strips one by one, and the extending direction of each second flattening part is the same as that of the corresponding interconnection strip;

the second flattening parts correspond to the first flattening parts, and the extending direction of each second flattening part is the same as that of the corresponding first flattening part.

Optionally, wherein:

along the extending direction of the interconnection strips, the first flattening part has a first length, the second flattening part has a second length, and the first length is the same as the second length;

in the extending direction of the serial cutting knife, the first flattening part has a first width, the second flattening part has a second width, and the first width is the same as the second width;

along the thickness direction of interconnection strip, first flattening has first thickness, and the second flattening has the second thickness, and first thickness is the same with the second thickness.

Optionally, wherein:

in the thickness direction of the interconnection bar, the string cutter is provided with a first height at the position provided with the first flattening part and the second flattening part, the string cutter is provided with a second height at the position not provided with the first flattening part and the second flattening part, and the first height is greater than the second height;

the bearing mechanism comprises a bearing table, a plurality of first grooves which correspond to the interconnection strips one by one are formed in the bearing table, the first grooves correspond to the first flattening parts and the second flattening parts, and each first groove is used for limiting the corresponding first flattening part and the corresponding second flattening part; each first groove is internally provided with a second groove used for bearing a corresponding interconnection strip.

Optionally, wherein:

in the extending direction of the stringing cutter, the first groove has a third width, the second groove has a fourth width, and the fourth width is smaller than the third width; the third width is smaller than the first width and the second width;

along the extending direction of the interconnection strips, the bearing table has a fifth width, the first groove has a third length, the second groove has a fourth length, and the third length, the fourth length and the fifth width are the same;

the value ranges of the first length and the second length are 3 mm-5 mm, and the value ranges of the first width and the second width are 3 mm-6 mm;

the value range of the third width is 4 mm-6 mm, the value range of the fourth width is 3 mm-5 mm, and the value range of the third length, the fourth length and the fifth width is 14 mm-22 mm.

Optionally, wherein:

in the thickness direction of the interconnection bar, the first groove has a third height, and the second groove has a fourth height;

the third height ranges from 1mm to 3mm, and the fourth height ranges from 0.09mm to 0.12mm.

In a second aspect, the present application further provides a photovoltaic module, including a solder ribbon and a plurality of solar cells, the solder ribbon including a bus bar and a plurality of interconnection bars soldered to the bus bar, each interconnection bar having a first portion connected to the bus bar and a second portion located between the solar cell and the first portion; wherein the first part is formed by the stringer described in the first aspect.

Optionally, wherein:

the first portion has a third thickness and the second portion has a fourth thickness; the third thickness is smaller than the fourth thickness, and the value range of the third thickness is 0.09 mm-0.12 mm.

Compared with the prior art, the series welding machine and the photovoltaic module provided by the application have the beneficial effects that at least:

the utility model provides a stringer, wherein divide the cluster device to flatten the interconnection bar part when cutting the interconnection bar between solar cell cluster and the cluster, the flattening part and the busbar welding of interconnection bar, make after subsequent photovoltaic module carries out the lamination, the thickness of busbar and interconnection bar hookup location department reduces, the production of the protruding phenomenon of solder strip after having avoided photovoltaic module lamination, photovoltaic module's good outward appearance has not only been guaranteed, the solder strip tin nail puncture glued membrane risk has still been reduced, photovoltaic module's performance has been guaranteed. Meanwhile, the photovoltaic adhesive film and the back plate in the photovoltaic module can be further thinned and reduced in weight on the premise of avoiding generating obvious welding strip bulges and avoiding puncturing the adhesive film, and the cost of the photovoltaic module is reduced. In addition, compared with a method for transferring the solar cells to other equipment for flattening after string separation, the string separating and flattening integrated string welding machine provided by the embodiment of the application reduces the time for flattening and improves the production efficiency of the photovoltaic module.

Of course, it is not necessary for any product to achieve all of the above technical effects simultaneously.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a top view of a pressing mechanism provided in an embodiment of the present application;

fig. 2 is a partial front view of a pressing mechanism provided in an embodiment of the present application;

FIG. 3 is a top view of a load bearing mechanism provided in accordance with an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of a load bearing mechanism provided in accordance with an embodiment of the present application;

fig. 5 is a schematic view of a solder strip provided in an embodiment of the present application.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The application provides a stringer and photovoltaic module for when dividing the cluster to the solar cell cluster flatten the interconnection bar part, reduced interconnection bar and busbar superimposed portion's thickness, and then realized photovoltaic module's attenuate, reduced solder strip tin nail puncture glued membrane risk simultaneously, guaranteed photovoltaic module's performance.

Fig. 1 is a top view of a pressing mechanism provided in an embodiment of the present application; fig. 2 is a partial front view of a pressing mechanism provided in an embodiment of the present application; FIG. 3 is a top view of a load bearing mechanism provided in accordance with an embodiment of the present application; fig. 4 is a partial cross-sectional view of a support mechanism provided in an embodiment of the present application.

As shown in fig. 1 to 4, the present application provides a series welding machine, which includes a string dividing device for dividing a solar cell string into strings, where the solar cell string includes a plurality of solar cells, and two adjacent solar cells are connected by a plurality of interconnecting bars; the string separating device comprises an upper pressing mechanism 10 and a bearing mechanism 11, wherein the upper pressing mechanism 10 is located above the solar cell string and used for cutting and partially flattening the interconnection strips, and the bearing mechanism 11 is located below the solar cell string and used for bearing the interconnection strips.

In specific implementation, as shown in fig. 1 to 4, when the solar cell strings are divided into strings, the interconnection bars connecting two adjacent solar cells move to above the carrying mechanism 11, the upper pressing mechanism 10 located above the solar cell strings moves downward to the interconnection bars carried by the carrying mechanism 11, and the interconnection bars are cut and partially flattened.

Known from the composition structure and the specific implementation process of the stringer, as shown in fig. 1-4, in the stringer provided by the embodiment of the application, the string dividing device can be used for cutting the interconnection bars between the solar cell strings and the strings and simultaneously flattening the interconnection bar parts, and the flattened parts of the interconnection bars are welded with the bus bars, so that after the subsequent photovoltaic modules are laminated, the thicknesses of the welding positions of the photovoltaic module head and tail, the middle bus bars and the interconnection bars are reduced, the generation of the welding strip protrusion phenomenon after the photovoltaic modules are laminated is avoided, the good appearance of the photovoltaic modules is ensured, the risk of the welding strip tin nails puncturing the adhesive film is also reduced, and the performance of the photovoltaic modules is ensured. Meanwhile, after the junction of the bus bar and the interconnection bar is thinned, the photovoltaic adhesive film and the back plate in the photovoltaic module can be further thinned and weight is reduced on the premise of avoiding generating obvious welding strip protrusions and avoiding puncturing the adhesive film, so that the whole photovoltaic module can be further thinned, and the weight and the cost of the photovoltaic module are reduced. In addition, the series welding machine that this application embodiment provided can flatten interconnection strip part when dividing the cluster to the solar cell cluster, compares with the method that transfers solar cell to other equipment and flattens again after dividing the cluster, and this kind of series welding machine of branch cluster flattening integral type has reduced the time when flattening, has improved and has flattened efficiency, and then has improved photovoltaic module's production efficiency.

For example, the series welding machine provided by the embodiment of the application can flatten the interconnection bar part to be 0.12mm or less, and the overlapping thickness of the interconnection bar part and the bus bar part is correspondingly reduced, so that the bulge caused by the tin nail on the photovoltaic module is avoided; after the interconnection strip is partially flattened, the weight of the photovoltaic adhesive film can be reduced to about 280-350 g, if the weight of the adhesive film is too small, the adhesive film is too thin, the tin nails can easily puncture the adhesive film, the back plate can be thinned to about 0.24-0.3 mm, if the back plate is too thin, the bulge of the welding strip is obvious, and if the weight of the adhesive film is too large or the back plate is too thick, the thickness of the photovoltaic module is too large, and the purposes of thinning and cost reduction cannot be achieved.

As a possible implementation manner, as shown in fig. 1 and fig. 2, the pressing mechanism 10 includes a serial cutting knife 103 and a first flattening structure 101 and a second flattening structure 102 respectively disposed at two opposite sides of the serial cutting knife 103, the serial cutting knife 103 is used for cutting the interconnection strip, and the first flattening structure 101 and the second flattening structure 102 are used for partially flattening the interconnection strip; the direction of extension of the string cutter 103 is perpendicular to the direction of extension of the interconnecting strips.

Based on this, as shown in fig. 1 and fig. 2, when the pressing mechanism 10 moves downward, the serial cutting knife 103 cuts the interconnection bar, and meanwhile, the first flattening structure 101 and the second flattening structure 102 located at two opposite sides of the serial cutting knife 103 flatten the interconnection bar at two sides, and the flattened interconnection bar is connected with the bus bar, so that the thickness of the connection part can be reduced, the projection of the solder strip at the bus bar position after the photovoltaic module is laminated is reduced, the good appearance and performance of the photovoltaic module are ensured, and the photovoltaic module is further thinned and reduced in weight; in addition, the functions of cutting the interconnection strips and partially flattening the interconnection strips are integrated in the series welding machine provided by the embodiment of the application, so that the production efficiency can be improved. The extending direction of the serial cutting knife 103 is vertical to the extending direction of the interconnecting strips, so that the edges obtained by cutting the interconnecting strips are more neat, and the subsequent welding operation is facilitated; meanwhile, the series-cutting knife 103 perpendicular to the extending direction of the interconnection bar is more beneficial to the alignment of the first flattening structure 101 and the second flattening structure 102 with the interconnection bar.

For example, the first collapsing structure and the second collapsing structure may move downward by the cylinder and achieve partial collapse of the interconnecting strips.

In some examples, as shown in fig. 1 and 2, the first crush structure 101 includes a plurality of first crush portions 1011 in one-to-one correspondence with the interconnection bars, each first crush portion 1011 extending in the same direction as the corresponding interconnection bar; the second flattening structure 102 comprises a plurality of second flattening portions 1021 corresponding to the interconnection bars one by one, and each second flattening portion 1021 has the same extending direction as the corresponding interconnection bar;

the second flattening portions 1021 correspond to the first flattening portions 1011, and the extending direction of each second flattening portion 1021 is the same as the extending direction of the corresponding first flattening portion 1011.

Based on this, when the pressing mechanism 10 moves downward, the first flattening portion 1011 and the second flattening portion 1021 move downward synchronously, and the interconnection bar portion located therebelow is flattened. The first flattening structures 101 comprise first flattening portions 1011 corresponding to the interconnection bars one by one, and the second flattening structures 102 comprise second flattening portions 1021 corresponding to the interconnection bars one by one, so that the manufacturing cost of the series welding machine can be reduced while the interconnection bars are flattened. Every first flattening portion 1011 and the extending direction of second flattening portion 1021 all are the same with the extending direction of interconnection strip, because the shape of interconnection strip itself is the rectangle, first flattening portion 1011 and the extending direction of second flattening portion 1021 are also the same, and the first flattening portion 1011 and the second flattening portion 1021 that correspond with the interconnection strip and be parallel can counterpoint with the interconnection strip better, avoided flattening the in-process because of flattening incomplete rework that leads to, improved production rate.

In some examples, as shown in fig. 1 and 2, the number of the first flattening portions 1011 and the second flattening portions 1021 may be adjusted according to the number of the interconnection bars, and when the number of the first flattening portions 1011 and the second flattening portions 1021 is the same as the number of the interconnection bars, each of the interconnection bars may be ensured to have the corresponding first flattening portions 1011 and the second flattening portions 1021 for flattening.

In some examples, as shown in fig. 1, the orthographic projections of the first flattening portion 1011 and the second flattening portion 1021 on the horizontal plane of the interconnection bar are both rectangular, and the shape of the flattened portion of the interconnection bar can be also rectangular by matching with the bearing mechanism, so as to facilitate the subsequent connection with the bus bar.

Exemplarily, as shown in fig. 1 and 2, when the orthographic projection of the first flattened part 1011 and the second flattened part 1021 on the horizontal plane of the interconnection bar are both rectangular, the first flattened part 1011 has a first length and the second flattened part 1021 has a second length along the extension direction of the interconnection bar, and the first length is the same as the second length;

along the extending direction of the serial cutting knife 103, the first flattening part 1011 has a first width, the second flattening part 1021 has a second width, and the first width is the same as the second width;

along the thickness direction of the interconnection strips, the first flattened portion 1011 has a first thickness, and the second flattened portion 1021 has a second thickness, the first thickness being the same as the second thickness.

Based on this, as shown in fig. 1 and fig. 2, the length of the first flattening portion 1011 in the extending direction of the interconnection bar is the same as that of the second flattening portion 1021, the width of the first flattening portion 1011 in the extending direction of the serial cutting knife 103 is also the same as that of the second flattening portion 1021, that is, the shape of the orthographic projection of the first flattening portion 1011 and the shape of the second flattening portion 1021 on the horizontal plane where the interconnection bar is located are the same, the thickness of the first flattening portion 1011 and the thickness of the second flattening portion 1021 are also the same, so that the pressure applied to the interconnection bars on both sides of the serial cutting knife 103 by the first flattening portion 1011 and the second flattening portion 1021 is the same, the interconnection bar formed by flattening by the first flattening portion 1011 and the second flattening portion 1021 has the same shape, so that the interconnection bar can obtain a more average welding tension when being connected with the bus bar, the difference of the welding tensions caused by the different flattening degrees or the different shapes is avoided, and the quality and the assembly efficiency of the photovoltaic module are ensured.

For example, the lengths of the first and second flattened portions may be 3mm, 4mm, 5mm, etc., and the widths of the first and second flattened portions may be 3mm, 4mm, 5mm, 6mm, etc., which are given by way of example only and are not particularly limited.

Illustratively, as shown in fig. 2, the thickness of the first flattening portion 1011 and the second flattening portion 1021 may be the same as the height of the serial cutting knife 103, or may not be flush with the upper side of the serial cutting knife 103, but slightly lower than the height of the serial cutting knife 103, so that the first flattening portion 1011 and the second flattening portion 1021 only need to have enough strength to flatten the interconnection strip.

Illustratively, the thickness of the string cutter ranges from 3mm to 5mm in the extending direction of the interconnecting strips, and if the thickness of the string cutter is too thin, the strength of the string cutter is not enough to cut off the interconnecting strips; if the thickness of cluster cutter is too thick, can influence the reciprocating speed of last pressure mechanism when dividing the cluster cutting to solar cell, and extravagant material can improve stringer's manufacturing cost.

As one possible implementation manner, as shown in fig. 1 to 4, in the thickness direction of the interconnection bar, the serial cutting knife 103 has a first height at a position where the first squashed portion 1011 and the second squashed portion 1021 are provided, and the serial cutting knife 103 has a second height at a position where the first squashed portion 1011 and the second squashed portion 1021 are not provided, and the first height is greater than the second height;

the bearing mechanism 11 comprises a bearing table 111, the bearing table 111 is provided with a plurality of first grooves 1111 corresponding to the interconnection bars one by one, the first grooves 1111 correspond to the first flattening parts 1011 and the second flattening parts 1021, and each first groove 1111 is used for limiting the corresponding first flattening part 1011 and the corresponding second flattening part 1021; each first groove 1111 has a second groove 1112 therein, the second grooves 1112 for carrying a respective interconnection bar.

Based on this, as shown in fig. 1 to fig. 4, when the solar cell string is divided into strings and partially flattened, the interconnection strip between two adjacent solar cells is located in the second groove 1112, and the interconnection strip with a circular cross section exceeds a part of the second groove 1112 in the thickness direction, during the downward movement of the stringing cutter 103 in the pressing mechanism 10 and the first and

second flattening portions

1011 and 1021, the first and

second flattening portions

1011 and 1021 gradually enter the first groove 1111, the interconnection strip in the second groove 1112 is also gradually pressed into the second groove 1112, and when the first and

second flattening portions

1011 and 1021 completely contact the groove bottom of the first groove 1111, the interconnection strip in the second groove 1112 is pressed to a thickness level with the height of the second groove 1112, and the flattening of the interconnection strip is completed. The second groove 1112 in the first groove 1111 can bear the interconnection strip, and the interconnection strip just can fall into the second groove 1112 completely after being flattened, so that the phenomenon that the interconnection strip turns over or deviates from the first flattening part 1011 and the second flattening part 1021 in the flattening process is effectively prevented, and the stability and the flattening quality of the interconnection strip in the flattening process are ensured. In order to facilitate the first and

second flattening portions

1011, 1021 to move downward into the first groove 1111 on the carrier table 111, the height of the serial cutting knife 103 at the position where the first and

second flattening portions

1011, 1021 are not provided is smaller than the height at the position where the first and

second flattening portions

1011, 1021 are provided.

In some examples, as shown in fig. 3 and 4, in the extending direction of the serial cutter, the first groove 1111 has a third width, the second groove 1112 has a fourth width, and the fourth width is smaller than the third width; the third width is smaller than the first width and the second width;

along the extending direction of the interconnection bar, the bearing platform 111 has a fifth width, the first groove 1111 has a third length, the second groove 1112 has a fourth length, and the third length, the fourth length and the fifth width are the same;

the value range of the third width is 4 mm-6 mm, the value range of the fourth width is 3 mm-5 mm, and the value ranges of the third length, the fourth length and the fifth width are 14 mm-22 mm.

Based on this, as shown in fig. 1 to 4, in the extending direction of the serial cutting knife 103, the width of the first groove 1111 is smaller than the widths of the first squashed portion 1011 and the second squashed portion 1021, so that whether the squashing is completed can be judged by whether the first squashed portion 1011 and the second squashed portion 1021 contact with the groove bottom of the first groove 1111; the width of the second groove 1112 is smaller than that of the first groove 1111, so as to prevent the first squashing portion 1011 and the second squashing portion 1021 from entering the second groove 1112 to cause over squashing. In the extending direction of the interconnection bar, the lengths of the first groove 1111 and the second groove 1112 are the same as the width of the carrier 111, so that the solar cell string can move more smoothly before and after being divided and flattened.

The length of the first flattening part 1011 and the second flattening part 1021 is 3 mm-5 mm, if the length of the first flattening part 1011 and the second flattening part 1021 is too long, the distance between the flattening part of the interconnection strip and the solar cell is too close, even the flattening part presses the solar cell, and the solar cell is easily damaged; if the lengths of the first flattening portion 1011 and the second flattening portion 1021 are too long, the welding area between the interconnection bar and the bus bar is too small, which may cause peeling of the interconnection bar, and affect the power generation efficiency of the photovoltaic module. The width of the first flattening part 1011 and the second flattening part 1021 is 3-6 mm, if the width of the first flattening part 1011 and the second flattening part 1021 is too small, the flattened part of the interconnection bar cannot be completely covered, so that the interconnection bar is insufficiently flattened, and the photovoltaic module still has a bulge after being laminated; if the widths of the first flattening portion 1011 and the second flattening portion 1021 are too large, it is difficult to ensure that each interconnection strip has a corresponding first flattening portion 1011 and second flattening portion 1021 for flattening.

The length of the first groove 1111 and the second groove 1112 and the width of the carrier 111 are in the range of 14mm to 22mm, and if the length of the first groove 1111 and the second groove 1112 and the width of the carrier 111 are too small, the interconnection strip cannot be uniformly flattened or cannot reach the expected flattening degree; if the lengths of the first and

second grooves

1111 and 1112 and the width of the susceptor 111 are too large, space and production costs are wasted. The value range of the width of the first groove 1111 is 4mm ~ 6mm, if the width of the first groove 1111 is too wide or too narrow, it is unfavorable for the counterpoint of the first flattening portion 1011 and the second flattening portion 1021 and the first groove 1111, and then influences the flattening quality of the interconnection strip. The width of the second groove 1112 ranges from 3mm to 5mm, and if the width of the second groove 1112 is too narrow, the interconnection bar cannot reach the expected flattening thickness; if the width of the second groove 1112 is too wide, the interconnection bar may shift within the second groove 1112, which may affect the flattening quality of the interconnection bar.

For example, when the widths of the first and second grooves are matched with the widths of the first and second flattening portions, the first and second flattening portions may be more stable when flattening the interconnection bar.

For example, the length of the first and second grooves and the width of the carrier may be 14mm, 16mm, 18mm, 20mm, 22mm, etc., the width of the first groove may be 4mm, 5mm, 6mm, etc., and the width of the second groove may be 3mm, 4mm, 5mm, etc., which is only an example and is not limited in particular.

In some examples, as shown in fig. 3 and 4, in the thickness direction of the interconnection strip, first groove 1111 has a third height and second groove 1112 has a fourth height;

Based on this, as shown in fig. 3 and 4, in the thickness direction of the interconnection bar, the height of the first groove 1111 ranges from 1mm to 3mm, and if the height of the first groove 1111 is too low, the first flattening portion and the second flattening portion are likely to turn over when being flattened, thereby affecting the flattening quality of the interconnection bar; if the height of the first recess 1111 is too high, the height of the supporting mechanism 11 also needs to be increased, which increases the production cost. The height of the second groove 1112 ranges from 0.09mm to 0.12mm, if the height of the second groove 1112 is too high, the interconnection bar cannot be sufficiently flattened, and after the photovoltaic module is laminated, the connection part of the interconnection bar and the bus bar still has a relatively obvious protrusion, which affects the performance and appearance of the photovoltaic module.

For example, the height of the second groove may be 0.09mm, 0.10mm, 0.11mm, 0.12mm, etc., and the height of the first groove may be 1mm, 2mm, 3mm, etc., by way of example only, and is not particularly limited.

Based on the same inventive concept, as shown in fig. 5, the present application also provides a photovoltaic module, which includes a solder ribbon and a plurality of solar cells, the solder ribbon includes a bus bar 21 and a plurality of interconnection bars 20 soldered on the bus bar 21, each interconnection bar 20 has a first portion 201 connected with the bus bar 21 and a second portion 202 located between the solar cell and the first portion 201; wherein the first part 201 is formed by the stringer described in the above embodiments.

Based on this, as shown in fig. 5, the first portion 201 of each interconnection bar 20 is partially flattened by the stringer described in the above embodiment, and after being connected to the bus bar 21, the solder strip protrusion phenomenon after the photovoltaic module is laminated is reduced or even not occurred, which not only ensures the good appearance of the photovoltaic module, but also reduces the risk that the solder strip tin nail punctures the adhesive film, and ensures the performance of the photovoltaic module. Meanwhile, after the junction of the bus bar 21 and the interconnection bar 20 is thinned, the photovoltaic adhesive film and the back plate in the photovoltaic module can be further thinned and weight is reduced on the premise of avoiding generating obvious welding strip protrusions and avoiding puncturing the adhesive film, so that the whole photovoltaic module can be further thinned, and the weight and the cost of the photovoltaic module are reduced.

In some examples, as shown in fig. 5, the first portion 201 has a third thickness and the second portion 202 has a fourth thickness; the third thickness is smaller than the fourth thickness, and the value range of the third thickness is 0.09 mm-0.12 mm.

Based on this, as shown in fig. 5, the thickness of the first portion 201 connected to the bus bar 21 after being flattened in the interconnection bar 20 is in the range of 0.09mm to 0.12mm, and if the thickness of the first portion 201 is too small, the interconnection bar 20 is easily twisted or broken, and even fragments of the solar cell are generated; if the thickness of the first portion 201 is too large, the solder strip is too thick, risking bulging or puncturing the adhesive film.

In some examples, as shown in fig. 5, the first portion 201 and the second portion 202 are combined to form an extended portion of the interconnection bar 20, the extended portion generally has a length of 6mm to 8mm, wherein the length of the first portion 201 is about 3mm to 5mm, if the length of the first portion 201 is too short, the connection with the bus bar 21 is easy to be weak, and if the length of the first portion 201 is too long, the interconnection bar 20 is easy to be twisted, even causing fragments of the solar cell.

To sum up, the application provides a stringer and photovoltaic module, has realized following beneficial effect at least:

the utility model provides a stringer, wherein divide the cluster device and can flatten interconnection bar part when cutting the interconnection bar between solar cell cluster and the cluster, the flattening part and the busbar welding of interconnection bar, make after follow-up photovoltaic module carries out the lamination, the thickness of busbar and interconnection bar welding position department reduces, the production of the protruding phenomenon of solder strip has been avoided after the photovoltaic module lamination, photovoltaic module's good outward appearance has not only been guaranteed, still reduced solder strip tin nail puncture glued membrane risk, photovoltaic module's performance has been guaranteed. Meanwhile, the photovoltaic adhesive film and the back plate in the photovoltaic module can be further thinned and reduced in weight on the premise of avoiding generating obvious welding strip bulges and avoiding puncturing the adhesive film, and the cost of the photovoltaic module is reduced. In addition, compared with a method for transferring the solar cells to other equipment for flattening after string separation, the string separating and flattening integrated string welding machine provided by the embodiment of the application reduces the time for flattening and improves the production efficiency of the photovoltaic module.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. A series welding machine is characterized by comprising a series dividing device for dividing a solar cell string into a plurality of solar cells, wherein the solar cell string comprises the plurality of solar cells, and every two adjacent solar cells are connected through a plurality of interconnection bars; the string separating device comprises an upper pressing mechanism and a bearing mechanism, the upper pressing mechanism is located above the solar cell string and used for cutting and partially flattening the interconnection strips, and the bearing mechanism is located below the solar cell string and used for bearing the interconnection strips.

2. The stringer of claim 1, wherein said pressing mechanism comprises a stringer and first and second flattening structures disposed on opposite sides of said stringer, said stringer for cutting said interconnecting strip and said first and second flattening structures for partially flattening said interconnecting strip; the extending direction of the string cutter is perpendicular to the extending direction of the interconnecting strips.

3. The stringer of claim 2, wherein said first crush feature comprises a plurality of first crush lobes in a one-to-one correspondence with said interconnection bars, each of said first crush lobes extending in the same direction as a respective said interconnection bar; the second flattening structures comprise a plurality of second flattening parts which correspond to the interconnection strips one to one, and the extending direction of each second flattening part is the same as that of the corresponding interconnection strip;

the second flattening parts correspond to the first flattening parts, and the extending direction of each second flattening part is the same as the extending direction of the corresponding first flattening part.

4. The stringer of claim 3, wherein said first flattened portion has a first length and said second flattened portion has a second length along the direction of extension of said interconnection bar, said first length being the same as said second length;

the first flattened portion has a first thickness and the second flattened portion has a second thickness along a thickness direction of the interconnection bar, the first thickness being the same as the second thickness.

5. The stringer according to claim 4, wherein said stringer has a first height at a position where said first and second beads are provided, and a second height at a position where said first and second beads are not provided, in a thickness direction of said interconnection bar, said first height being greater than said second height;

the bearing mechanism comprises a bearing table, a plurality of first grooves which correspond to the interconnection strips one to one are arranged on the bearing table, the first grooves correspond to the first flattening parts and the second flattening parts, and each first groove is used for limiting the corresponding first flattening part and the corresponding second flattening part; each first groove is internally provided with a second groove used for bearing the corresponding interconnection strip.

6. The stringer according to claim 5, wherein along the extending direction of said stringer, said first groove has a third width, said second groove has a fourth width, and said fourth width is smaller than said third width; the third width is less than the first width and the second width;

the value range of the third width is 4-6 mm, the value range of the fourth width is 3-5 mm, and the value ranges of the third length, the fourth length and the fifth width are 14-22 mm.

7. The stringer according to claim 5, wherein said first groove has a third height and said second groove has a fourth height in a thickness direction of said interconnection bar;

8. A photovoltaic module comprising a solder ribbon and a plurality of solar cells, the solder ribbon comprising a bus bar and a plurality of interconnection bars soldered to the bus bar, each of the interconnection bars having a first portion connected to the bus bar and a second portion between the solar cell and the first portion; wherein the first part is formed by the stringer according to any one of claims 1 to 7.

9. The photovoltaic assembly of claim 8, wherein the first portion has a third thickness and the second portion has a fourth thickness; the third thickness is smaller than the fourth thickness, and the value range of the third thickness is 0.09 mm-0.12 mm.