CN214291558U

CN214291558U - Series welding press pin structure and series welding machine

Info

Publication number: CN214291558U
Application number: CN202120274578.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Xuancheng Ruihui Xuansheng Enterprise Management Center Partnership LP
Current assignee: Xuancheng Ruihui Xuansheng Enterprise Management Center Partnership LP
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-09-28
Anticipated expiration: 2031-01-29

Abstract

The application discloses stringer structure and stringer, this stringer structure includes: needle pressing rows and needles pressing; the surface of battery piece is provided with many main grid lines, the series welding tucking structure includes tucking and a plurality of tucking, wherein: the pressing pin row is positioned above the main grid lines, and the pressing pin row spans all the main grid lines on the surface of the battery piece to be welded in the length direction of the pressing pin row; the pressing pins are arranged on the surface, close to the to-be-welded battery piece, of the pressing pin row, the pressing pins are arranged along the length direction of the pressing pin row, the distance between every two adjacent pressing pins is adjustable, and the pressing pins face the to-be-welded battery piece. The technical scheme of this application can effectively reduce the emergence of the uneven phenomenon of welding pulling force, is applicable to the series welding technology of the battery piece of more models moreover.

Description

Series welding press pin structure and series welding machine

Technical Field

The application relates to the technical field of semiconductors, in particular to a series welding press pin structure and a series welding machine.

Background

The welding of solar cells is an important process in the production and manufacturing process of photovoltaic modules. At present, a full-automatic series welding machine is generally used for realizing a welding process of a photovoltaic module, and welding strips are mostly connected with each other by adopting an infrared welding method. In the processing process, one part of the welding strip is laid on the main grid line of the previous battery piece, the other part of the welding strip is exposed, the next battery piece is placed at the adjacent position of the previous battery piece and pressed on the exposed welding strip, then the battery pieces which are connected end to end are sequentially connected through an infrared welding head, soldering tin on the welding strip is melted under the high temperature of infrared rays, the welding of the welding strip and the battery pieces is completed, the battery pieces are mutually connected in series, and the continuous battery string production is completed.

In the welding process of the photovoltaic module, the welding strip is pressed on the main grid line of the previous cell, and needs to be fixed in position by the pressing pin, and the schematic structural diagram of the prior art (taking 4 main grid lines as an example) that the pressing pin presses on the same main grid line of the cell is shown in fig. 1. Referring to fig. 1, in the prior art, the whole pinch pin array is suspended over one welding strip, heat radiated by the infrared lamp tube is inevitably absorbed by the pinch pin array when the front of the battery piece is welded, and only the part of the welding strip in contact with the pinch pin can rapidly transfer the heat to the welding strip, so that the welding strip at the position is rapidly melted and welded. However, most of the solder strips not in contact with the pressing pins cannot achieve the same welding effect as the solder strips in contact with the pressing pins due to untimely heat transfer, and the overall performance is that the welding tension is uneven, the welding stability is poor, and the reliability of the photovoltaic module is reduced.

On the other hand, the battery pieces have different specifications, such as different widths, or inconsistent widths and different quantities of main grid lines on the battery pieces, so that different series welding pressing pin structures need to be continuously replaced, the pressing pin structures are frequently replaced, the production efficiency is reduced, and the use is inconvenient.

Disclosure of Invention

In order to solve the problem that the reliability of the assembly is reduced due to uneven welding tension in the infrared welding process and the efficiency of the pressing pin structure is reduced due to frequent replacement, the application expects to provide a series welding pressing pin structure and a series welding machine.

One aspect of this application provides a series welding tucking structure for form photovoltaic module with the battery piece series welding, the surface of battery piece is provided with many main grid lines, the series welding tucking structure includes tucking row and a plurality of tucking, its characterized in that:

the pressing pin row is positioned above the main grid lines, and the pressing pin row spans all the main grid lines on the surface of the battery piece to be welded in the length direction of the pressing pin row;

the pressing pins are arranged on the surface, close to the to-be-welded battery piece, of the pressing pin row, the pressing pins are arranged along the length direction of the pressing pin row, the distance between every two adjacent pressing pins is adjustable, and the pressing pins face the to-be-welded battery piece.

In some examples, one end of the pressing pin is connected with the surface of the pressing pin row close to the cell to be welded in a sliding mode, and the other end of the pressing pin is perpendicular to the surface, provided with the main grid lines, of the cell to be welded.

In some examples, the pressing pin row is provided with a sliding groove on the surface close to the to-be-welded battery piece, the sliding groove extends along the length direction of the pressing pin row, the pressing pin comprises a fixing part and a line pressing part, the fixing part is connected with the sliding groove in a sliding mode, and the line pressing part is used for pressing the main grid line.

In some examples, the wire pressing part is arranged in a sheet shape, and the bottom surface of the wire pressing part has a width capable of covering at least one main grid line.

In some examples, the pressing part is a circular sheet, and the plane of the pressing part is parallel to the surface of the cell to be welded, which is provided with the main grid line.

In some examples, the plane of the pressing needle row is parallel to the plane of the to-be-welded battery piece with the main grid line, and the length direction of the pressing needle row is perpendicular to the main grid line of the to-be-welded battery piece.

In some examples, the series welding pressing pin structure includes a plurality of pressing pin rows, the plurality of pressing pin rows are arranged at intervals, and the pressing pin arranged on each pressing pin row respectively presses the welding strip corresponding to each main grid line on the battery piece to be welded.

In some examples, a plurality of the pressing needle rows are uniformly distributed in the direction of the main grid line of the cell to be welded.

In some examples, the pressing pins are detachably connected with the pressing pin row.

The utility model also provides a stringer, including above-mentioned arbitrary string welding tucking structure.

According to the series welding press pin structure, the position of the press pin row stretches across all the main grid lines on the battery piece, and the welding strip on each main grid line is pressed by one press pin, so that the welding strip which is not in contact with the press pin can directly receive heat radiated from the infrared lamp tube, the heat loss of the infrared lamp tube during instantaneous heating of the welding strip can be reduced to the maximum extent, and the phenomenon of uneven welding tension is reduced; on the other hand, the distance between adjacent pressing pins can be adjusted, the series welding process of battery slices of more models is suitable, and the welding process of the battery slices with different numbers and different distances of main grid lines can be suitable.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 is a schematic view of a series welding press pin structure in the related art.

Fig. 2 is a schematic view of a structure and an installation of a series welding press pin structure according to an embodiment of the present application.

Fig. 3 is another structure of a series welding press pin structure and an installation diagram thereof according to an embodiment of the present application.

Fig. 4a is a front view of a sliding connection between a pressing pin and a pressing pin row in a series welding pressing pin structure according to an embodiment of the present application.

Fig. 4b is a side view of the sliding connection between the pressing pin and the pressing pin row in the series welding pressing pin structure provided by the embodiment of the application.

Description of reference numerals:

11. a battery piece; 12. pressing a needle row; 13. pressing the needle; 14. a main gate line; 15. a sliding groove; 131. a fixing part of the pressing pin; 132. and a pressing part of the pressing pin.

Detailed Description

The principles and spirit of the present application will be described with reference to a number of exemplary embodiments. It should be understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the present application, and are not intended to limit the scope of the present application in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Fig. 2 shows an exemplary structure diagram of a series bonding pin structure in the embodiment of the present application. Referring to fig. 2, the series welding bonding pin structure of the embodiment of the present application may include: a needle pressing row 12 and a needle pressing 13. The needle pressing row 12 can be in a long strip shape and is arranged above the battery piece 11, and the length of the needle pressing row is greater than the distance between the main grid lines 14 at the edges of two sides of the battery piece 11, that is, the needle pressing row 12 can cross all the main grid lines 14 on the battery piece 11; the plane that the row of tucking was located keeps parallel with the battery piece, tucking is arranged length direction and is perpendicular with the grid line of battery piece, this kind of structure sets up, when using infrared welding, only be arranging length direction at tucking and be arranged main grid line 14 under it and sheltered from by tucking 12, and the main grid line 14 of other parts is all not sheltered from, compare in the whole 14 whole circumstances of sheltered from of root main grid line among the prior art, the area that shelters from reduces, and the part that is sheltered from all is pressed 13 glands of tucking, thereby can also pass through 13 heat conduction of tucking, then the place that is not sheltered from can normally be welded, and the part that is sheltered from can also be through 13 heat conduction welding of tucking, the homogeneity of being heated has obtained the promotion, thereby effectively reduced the uneven phenomenon of welding pulling force.

In addition, referring to fig. 4a, a sliding groove 15 is further arranged below the needle pressing row 14, the direction of the sliding groove 15 is consistent with the length direction of the needle pressing row 12, a plurality of needle pressing 13 are arranged in the sliding groove 15, and the plurality of needle pressing 13 can slide in the sliding groove 15, so that the needle pressing 13 can slide for battery pieces with different specifications, and the distance between adjacent needle pressing can be kept consistent with the distance between main grid lines 14 on the battery pieces; after the type of welding battery piece is changed in process of production, just can directly slide tucking 13 on tucking bar 12, change tucking 13's position in order to adapt to new battery piece to avoid changing the real tucking bar, need not purchase the tucking bar of each model, reduce cost has also enlarged tucking bar's application scope.

In other embodiments, the pressing pin comprises a fixing part and a pressing line part, wherein the fixing part is in a round rod shape, so that threads and nuts can be arranged on the outer side of one end, connected with the sliding groove, of the fixing part, when the pressing pin slides to a proper position, the pressing pin can be fixed on the pressing pin row by screwing the nuts, and the pressing pin is guaranteed to be pressed downwards stably.

Of course, in other embodiments, the pressing pin and the sliding groove may be detachably connected, for example, openings are provided at two ends of the sliding groove, and the pressing pin may be directly installed or detached from the openings at two ends, so as to adapt to different numbers of main grid lines.

Comparing fig. 1 and fig. 2, it can be seen that, in the prior art, the whole pin header is suspended right above the solder strip, so that part of heat radiated to the solder strip by the infrared lamp tube is shielded. Only the part of the welding strip in contact with the pressing pin has small influence due to good heat conductivity of metal, so that the welding effect of most of the welding strip which is not in contact with the pressing pin is poor, and the welding tension of the whole welding strip is not uniform. And the position of the needle bar is changed into the direction perpendicular to the welding strip in the embodiment of the application, the part of the welding strip which is not in contact with the pressing needle does not have the shielding effect, the welding effect of the part of the welding strip can be improved, meanwhile, the part of the welding strip which is not in contact with the pressing needle 13 has shielding effect, but has less heat loss, the welding strip which is not in contact with the pressing needle can also directly receive the heat radiated from the infrared lamp tube, the heat loss of the infrared lamp tube during the instantaneous heating of the welding strip can be reduced to the maximum extent, the heating uniformity of the whole welding strip is improved, and the phenomenon of uneven welding tension is effectively reduced.

In at least some embodiments, the series welding pressing pin structure in the embodiments of the present application may include a plurality of pressing pin rows 12, the plurality of pressing pin rows 12 are all disposed parallel to the battery piece, and each pressing pin row 12 is disposed perpendicular to the main grid line 14 of the battery piece 11, in the length direction of the main grid line 14, the plurality of pressing pin rows 12 are uniformly disposed, and the pressing pin 13 disposed on each pressing pin row 12 respectively presses the welding strip on each main grid line 14 in the battery piece 11. That is, the number of the pressing pins 13 on each pressing pin row 12 and the installation positions thereof are consistent with the number of the main grid lines 14 in the battery piece 11 and the positions thereof. Fig. 3 shows a schematic diagram of a series welding press pin structure in this embodiment, the main grid lines of the battery piece 11 include four, the adjacent press pin rows 12 are arranged in parallel with the same spacing, and the four press pins 13 on each press pin row 12 respectively press the four main grid lines of the battery piece 11. It should be noted that although only three pin rows 12 are shown in fig. 3, those skilled in the art will appreciate that the number of pin rows 12 can be determined according to actual requirements and specific sizes of the battery cells. The embodiments of the present application are not limited thereto.

In some examples, for a 156.75 mm-156.75 mm cell, the number of the pressing pin rows 12 which can be arranged in parallel with the solder strip direction on the cell can be 5-8, that is, the number of the pressing pin rows 12 which can be arranged in parallel with the solder strip direction on the cell can be 5, 6, 7 or 8.

Because the number of the main grid lines of the current solar cell is not uniform, the solar cell comprises three main grid lines, four main grid lines, five main grid lines and even twelve main grid lines, wherein the four main grid lines and the five main grid lines are mainly used. In order to facilitate switching of welding processes between the two battery pieces, in at least some embodiments, the pressing pins 13 in the series welding pressing pin structure of the embodiments of the present application are slidably connected to the pressing pin row 12, so as to facilitate switching of series welding processes of battery pieces with different numbers of main grid lines.

Fig. 4a shows a front view of the sliding connection between the presser pin 13 and the presser bar 12, and fig. 4b shows a side view of the sliding connection between the presser pin 13 and the presser bar 12. Referring to fig. 4a and 4b, the main body of the needle bar 12 is provided with a sliding groove 15, and the sliding groove 15 can be used for arranging the pressing needles 13 with different numbers and intervals (or positions), so that the requirements of the battery sheets with different numbers of main grid lines in the switching process of the series welding process can be met by arranging the pressing needles 13 with different intervals and numbers in the sliding groove 15 on the main body of the needle bar 12.

In some embodiments, the structure of the sliding groove 15 on the main body of the pin header 12 can meet the requirements of the number and arrangement of various main grid lines. In some examples, the sliding groove 15 may have an elongated shape, and the length thereof allows the number and the position of the pressing pins to be installed to meet the requirements of battery sheets with different numbers of main grid lines. In some examples, the sliding groove 15 may include a plurality of separated pressing pin installation grooves, so that the sliding groove 15 may also be used to install pressing pins adapted to the number and arrangement of the main grid lines of the battery piece with different numbers of main grid lines. Specifically, if the battery piece to be welded is a three-main-grid-line battery piece, three pressing pin installation grooves can be correspondingly arranged in the long-strip-shaped sliding groove 15 according to the positions corresponding to the main grid lines in the three-main-grid-line battery piece, and are used for installing the pressing pins 13. If the battery piece needing to be welded is other battery pieces with different numbers of main grid lines, the principle is similar to the above. Therefore, the pin header 12 with the sliding groove 15 can be applied to various types of battery pieces such as twelve main grids, three main grids, four main grids, five main grids and the like.

In some embodiments, the spacing between the pressing pins 13 adjacent to each other on the same pressing pin row 12 is adjustable to meet the requirements of various numbers and arrangements of main grid lines. In some examples, the pressing pins 13 may be detachably or slidably mounted in the sliding grooves 15 of the pressing pin row 12, so that the distance between adjacent pressing pins 13 may be adjusted at any time according to the distance between the main grid lines 14 adjacent to each other in the battery piece 11, so as to facilitate switching of series welding processes of battery pieces with different numbers of main grid lines. For example, a structure such as a screw-screw, rivet, snap, or the like may be used to detachably mount the pressing pins 13 in the sliding grooves 15 of the pressing pin row 12.

In some embodiments, the pressing pin 13 may include a fixing portion 131 and a pressing portion 132. The fixing portion 131 may be a rod shape, one end of which is slidably connected to the pin header 12 and the other end of which is fixedly connected to the wire pressing portion 132, and the wire pressing portion 132 is used for pressing the main gate line. The wire pressing part 132 may have a sheet shape, and a bottom surface thereof has a width capable of covering at least one bus bar.

In some examples, the fixing portion 131 is used to fix the presser pins 13 under the presser bar row 12 while spacing the presser bar row 12 from the presser wires of the presser pins 13 so as to fix the presser pins 13 in a row.

In some examples, the wire pressing portion 132 may be, but is not limited to, a circular, square, oval or any other shape sheet structure, and the diameter of the sheet structure is slightly larger than the diameter of the main grid lines and smaller than the distance between adjacent main grid lines, so as to prevent the same pressing pin 13 from pressing two main grid lines 14 at the same time to affect the welding effect. Here, the connection structure between the pressing pin 13 and the bus bar 14 may adopt an existing design, and the embodiment of the present application is not limited thereto.

In a specific application, the fixing portion 131 and the crimping portion 132 of the presser pin 13 may be integrally formed. Or the fixing part and the line pressing part are respectively independent pieces and are fixedly connected. The embodiments of the present application are not limited thereto.

A series welding machine comprises the series welding press pin structure, the series welding press pin structure comprises a plurality of press pin rows, and press pins arranged on each press pin row are respectively pressed on welding strips corresponding to main grid lines on a battery piece to be welded.

According to the series welding press pin structure, the position and the direction of the press pin row are adjusted, so that the welding strip which is not in contact with the press pins can directly receive heat radiated from the infrared lamp tube, the heat loss of the infrared lamp tube during instantaneous heating of the welding strip is reduced to the maximum extent, and the phenomenon of uneven welding tension is effectively reduced. In addition, the pressing pins are in sliding connection with the pressing pin row, so that the series welding process is suitable for series welding processes of more types of battery pieces, and switching of series welding processes of the battery pieces with different numbers and different intervals of main grid lines is facilitated.

The above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the present disclosure, and should be construed as being included therein.

Claims

1. The utility model provides a series welding tucking structure for form photovoltaic module with the battery piece series welding, the surface of battery piece is provided with many main grid lines, series welding tucking structure includes tucking row and a plurality of tucking, its characterized in that:

the pressing pins are arranged on the surface, close to the cell to be welded, of the pressing pin row, the pressing pins are arranged along the length direction of the pressing pin row, and the distance between every two adjacent pressing pins is adjustable.

2. The series welding pressing pin structure according to claim 1, wherein one end of the pressing pin is connected with the surface of the pressing pin row close to the cell piece to be welded in a sliding mode, and the other end of the pressing pin is perpendicularly oriented to the surface of the cell piece to be welded, wherein the surface of the cell piece to be welded is provided with the main grid line.

3. The series welding press pin structure according to claim 2, wherein the surface of the press pin row close to the battery piece to be welded is provided with a sliding groove extending along the length direction of the press pin row, the press pin comprises a fixing part and a press line part, the fixing part is connected with the sliding groove in a sliding manner, and the press line part is used for pressing the main grid line.

4. The tandem bonding pin structure of claim 3, wherein the wire pressing portion is formed in a sheet shape, and a bottom surface thereof has a width capable of covering at least one of the bus bars.

5. The string welding pressing needle structure according to claim 4, wherein the pressing part is a circular sheet, and the plane of the pressing part is parallel to the surface of the cell to be welded, which is provided with the main grid line.

6. The series welding press pin structure according to any one of claims 1 to 5, wherein the plane of the press pin row is parallel to the plane of the cell piece to be welded with the main grid line, and the length direction of the press pin row is perpendicular to the main grid line of the cell piece to be welded.

7. The series welding pressing pin structure according to any one of claims 1 to 5, wherein a plurality of the pressing pin rows are included in the series welding pressing pin structure, the plurality of the pressing pin rows are arranged at intervals, and the pressing pin arranged on each pressing pin row respectively presses the welding strip corresponding to each main grid line on the cell piece to be welded.

8. The series welding pressing pin structure of claim 7, wherein a plurality of pressing pin rows are uniformly distributed in the direction of the main grid line of the cell to be welded.

9. The tandem bonding needle structure according to any one of claims 1 to 5, wherein the bonding needle is detachably connected to the bonding needle bank.

10. A stringer comprising the structure of a stringer pin according to any of claims 1 to 9.