CN218731016U

CN218731016U - Calendering frock, stringer and photovoltaic module

Info

Publication number: CN218731016U
Application number: CN202223033905.8U
Authority: CN
Inventors: 张怡青; 卢江凯; 黎刚; 黄磊
Original assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Current assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-24
Anticipated expiration: 2032-11-14

Abstract

The utility model discloses a calendering frock, stringer and photovoltaic module. This calendering frock includes: the upper rolling and the lower rolling are arranged corresponding to the upper rolling; the upper rolling is provided with a first welding strip contact surface, and the lower rolling is provided with a second welding strip contact surface; the first welding strip contact surface and the second welding strip contact surface are arranged oppositely; the first welding strip contact surface and/or the second welding strip contact surface are/is provided with a groove, the groove extends along a first direction and is communicated with the first welding strip contact surface and the second welding strip contact surface, and the first direction is parallel to the first welding strip contact surface and the second welding strip contact surface. This calendering frock is through changing the shape of welding the area contact surface, makes its welding strip surface that flattens form the line, increases the friction force of flattening the surface, hinders the flow of tin, avoids forming piling up of tin to avoid the production of tin pearl and tin nail, and the surface that has the line is diffuse reflection, and the sunlight homoenergetic reflects and reaches the battery piece, has still increased the photic area, thereby promotes photovoltaic module power.

Description

Calendering frock, stringer and photovoltaic module

Technical Field

The utility model relates to a photovoltaic technology field, more specifically relates to a calendering frock, stringer and photovoltaic module.

Background

At present, the position that has the reflection of light effect on general solder strip is smooth flattening shape, and smooth position is when having the difference in height, and tin piles up easily after melting and form the tin pearl to receiving the stress condition to draw into the tin nail of nail form very easily, tin pearl or tin nail all probably pierce through the glued membrane, cause the influence to the power and the reliability of product, and smooth surface is mirror reflection moreover, and during the sunlight vertical exposure, the whole reflection of light goes back, can't reach the battery piece, and is low to the utilization ratio of light.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a calendering frock, stringer and photovoltaic module. This calendering frock makes its solder strip surface that flattens out form the line through the shape that changes the solder strip contact surface, hinders the flow of tin to avoid the production of tin pearl and tin nail, its surface has still realized diffuse reflection, increases the photic area, promotes photovoltaic module power.

The utility model provides a calendering frock, include: the upper rolling and the lower rolling are arranged corresponding to the upper rolling; the upper rolling is provided with a first welding strip contact surface, and the lower rolling is provided with a second welding strip contact surface; the first welding strip contact surface and the second welding strip contact surface are arranged oppositely; the first welding strip contact surface and/or the second welding strip contact surface are/is provided with a groove, the groove extends along a first direction and is communicated with the first welding strip contact surface and the second welding strip contact surface, and the first direction is parallel to the first welding strip contact surface and the second welding strip contact surface.

Optionally, the cross section of the groove along the second direction is triangular, wavy or rectangular; the second direction is perpendicular to the first direction.

Optionally, when the cross section of the groove along the second direction is triangular, an included angle between two side walls of the groove is α, and 90 ° < α <180 °.

Optionally, an included angle between the first direction and the axial direction of the welding strip is β, and β is greater than or equal to 0 degree and less than or equal to 90 degrees.

The utility model also provides a stringer, include: the rolling device comprises a frame, a cylinder connected with the frame and any one of the rolling tools; the upper rolling is connected with a piston rod of the air cylinder, and the lower rolling is connected with the rack.

Optionally, frame fixedly connected with bolt, the bar hole has been seted up to the upper calendar, the bar hole is followed the flexible direction of piston rod of cylinder extends, the bolt inserts the bar is downthehole and follow the extending direction in bar hole removes.

Optionally, the downward extending part is provided with a connecting block, the frame is provided with a mounting groove, and the connecting block is inserted into the mounting groove.

Optionally, the mounting groove extends in a direction perpendicular to the axial direction of the welding strip, and the mounting groove is provided with a plurality of the connecting blocks in an inserting manner in the extending direction.

Optionally, a limit baffle for preventing the connecting blocks from moving is arranged on the rack, and the limit baffle is located between every two adjacent connecting blocks.

The utility model also provides a photovoltaic module, include: the battery comprises a positive packaging layer, a first bonding layer, a battery sheet layer, a second bonding layer and a back packaging layer which are arranged in a laminated manner; the welding strip is manufactured by the rolling tool of any one of the above items and is used for connecting two adjacent battery pieces; the solder strip is provided with a light reflecting and flattening area, and the range of the light reflecting and flattening area along the axial length of the solder strip is 6-12mm.

Compared with the prior art, the utility model provides a pair of calendering frock, stringer and photovoltaic module has realized following beneficial effect at least:

the utility model provides a pair of calendering frock, stringer and photovoltaic module, this calendering frock is through changing the shape of welding the area contact surface, make its welding area surface that flattens form the line, the friction force of flattening surface has been increaseed, hinder the flow of tin, avoid forming piling up of tin, thereby avoid the production of tin pearl and tin nail, and the surface that has the line is diffuse reflection, the sunlight homoenergetic of different angles can reflect and reach the battery piece, the surface that has the line has still increased the photic area, make full use of sunlight, thereby promote photovoltaic module power.

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

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a schematic front view of a calendaring tool provided in this embodiment;

fig. 2 is a schematic side view of a calendaring tool provided in this embodiment;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic structural diagram of a solder strip provided in this embodiment;

fig. 5 is a schematic view of an assembly structure of a battery plate and a solder strip when β is 90 ° according to this embodiment;

FIG. 6 is an enlarged schematic view of the structure at B in FIG. 5;

FIG. 7 is a schematic cross-sectional view at C-C' of FIG. 5;

fig. 8 is a schematic view of an assembly structure of the battery plate and the solder strip when β is 0 ° according to the present embodiment;

FIG. 9 is an enlarged schematic view of the structure of FIG. 8 at D;

fig. 10 is a schematic view of an assembly structure of a battery plate and a solder strip when β is 45 ° according to this embodiment;

FIG. 11 is an enlarged schematic view of FIG. 10 at E;

FIG. 12 is a schematic view of the assembled structure of the frame and the lower press-rolling provided in the present embodiment;

FIG. 13 is a schematic cross-sectional view at F-F' in FIG. 12;

fig. 14 is a schematic structural diagram of a photovoltaic module provided in this embodiment;

fig. 15 is a schematic structural diagram of another photovoltaic module provided in this embodiment.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, 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 invention.

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

Techniques, methods, and apparatus known to those 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 merely illustrative, and not 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.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic front view of a rolling tool according to this embodiment; fig. 2 is a schematic side view of a calendaring tool provided in this embodiment; this embodiment provides a calendering frock, includes: an upper rolling 1 and a lower rolling 2 provided corresponding to the upper rolling 1; the upper rolling 1 is provided with a first welding strip contact surface 4, and the lower rolling 2 is provided with a second welding strip contact surface 5; the first welding strip contact surface 4 is opposite to the second welding strip contact surface 5; in general, the upper roll 1 is disposed above, the lower roll 2 is disposed below, and the first solder ribbon contact surface 4 and the second solder ribbon contact surface 5 are both in a horizontal position. During the calendering processing, lower calendering 2 is fixed, and the solder strip 10 of waiting to process is placed on second solder strip contact surface 5, and upper calendering 1 receives the exogenic action and moves down, and first solder strip contact surface 4 extrudes solder strip 10 on second solder strip contact surface 5, extrudees the flat shape.

The first welding strip contact surface 4 and/or the second welding strip contact surface 5 are/is provided with a groove 7; the rolling tool in the embodiment can roll the groove 7 on a single surface, and can roll the groove 7 on two surfaces, by improving the surface structure of the rolling tool, lines are pressed when the welding strip 10 is flattened, and the correspondingly manufactured welding strip 10 can have lines on a single surface, and can also have lines on two surfaces; the side, which irradiates sunlight, of the welding strip 10 is provided with grains for diffusely reflecting the sunlight, so that the sunlight can be reflected to the cell piece 9, and the light receiving area of the photovoltaic module is increased; the surface of the solder strip 10, which faces away from the sunlight, is provided with grains for preventing the accumulation of tin balls. The groove 7 extends and penetrates in a first direction X, which is parallel to the first solder strip contact surface 4 and the second solder strip contact surface 5.

According to the embodiment, the rolling tool provided by the embodiment at least has the following beneficial effects:

the calendering frock that this embodiment provided is through changing the shape of welding the area of contact, make its welding strip surface formation line that flattens, the friction force of having increaseed the flat surface, hinder the flow of tin, avoid forming the piling up of tin, thereby avoid the production of tin pearl and tin nail, and the surface that has the line is diffuse reflection, the sunlight homoenergetic of different angles can reflect and reach battery piece 9, the surface that has the line has still increased the photic area, make full use of sunlight, thereby promote photovoltaic module power.

In some alternative embodiments, referring to fig. 3 and 4, fig. 3 is an enlarged schematic view of a structure at a in fig. 2; FIG. 4 is a schematic structural diagram of a solder strip provided in this embodiment; the section of the groove 7 along the second direction Y is triangular, wavy or rectangular; the second direction Y is perpendicular to the first direction X. The cross section of the groove 7 is triangular, wavy or rectangular, and the three shapes are common shapes in process machining, so that the groove 7 can be conveniently machined on the upper rolling 1 and the lower rolling 2, and the production efficiency is improved; the cross section of the groove 7 can be in any shape, and can be determined according to the actual production condition, and the cross section of the groove is not specifically limited in this embodiment.

In some alternative embodiments, continuing to refer to fig. 3 and 4, when the cross-section of the groove 7 along the second direction Y is triangular, the included angle between the two side walls of the groove 7 is α,90 ° < α <180 °.

Specifically, when the cross section of the groove 7 along the second direction Y is triangular, the included angle between the two side walls of the groove 7 is α, which is 90 ° < α <180 °; if the cross section of the groove 7 along the second direction Y is triangular, the included angle alpha between the two side walls of the groove 7 is less than or equal to 90 degrees, the solar rays can not be reflected on the cell piece 9; if the section of the groove 7 along the second direction Y is triangular, the included angle α between the two side walls of the groove 7 is not less than 180 °, the solar rays cannot be reflected on the cell sheet 9; therefore, when the cross section of the groove 7 along the second direction Y is triangular, the included angle between the two side walls of the groove 7 is α, and 90 ° < α <180 °, the solar rays can be reflected to the cell 9 as much as possible. α may be 100 °, 110 °, 120 °, 150 °, or 170 °.

In some alternative embodiments, referring to fig. 5 to 11, fig. 5 is a schematic view of an assembly structure of a battery plate and a solder strip when β is 90 ° according to this embodiment; FIG. 6 is an enlarged schematic view of the structure at B in FIG. 5; FIG. 7 is a schematic cross-sectional view at C-C' of FIG. 5; fig. 8 is a schematic view of an assembly structure of the battery plate and the solder strip when β is 0 ° according to the present embodiment; FIG. 9 is an enlarged schematic view of the structure of FIG. 8 at D; fig. 10 is a schematic view of an assembly structure of a battery plate and a solder strip when β is 45 ° according to this embodiment; FIG. 11 is an enlarged schematic view of FIG. 10 at E; the included angle between the first direction X and the axial direction of the welding strip 10 is beta, and beta is more than or equal to 0 degree and less than or equal to 90 degrees. The first direction X can form any included angle with the welding strip, and beta can be 0 degree, 30 degrees, 45 degrees, 60 degrees or 90 degrees.

Referring to fig. 12 and 13, fig. 12 is a schematic view of an assembly structure of the frame and the lower press-rolling provided by the present embodiment; FIG. 13 is a schematic cross-sectional view at F-F' in FIG. 12; this embodiment also provides a stringer, includes: the rolling device comprises a frame 13, a cylinder connected with the frame 13 and the rolling tool of any one embodiment; the upper die 1 is connected with a piston rod of a cylinder (not shown in the figure), and the lower die 2 is connected with a frame 13. The installation calendering frock on stringer, the lower calendering 2 is installed and is fixed on frame 13, and the piston rod of cylinder concertina movement drives upper calendering 1 and moves towards the direction that is close to/keeps away from lower calendering 2.

In the prior art, the reflection of light of a welding strip in the photovoltaic industry is adjusted on materials, namely, a groove structure for reflecting light is made in the production process of the welding strip. The precision requirement of the prepared reflecting welding strip on equipment is high, and the production is difficult; and at present, the multi-main-grid photovoltaic module adopts a circular welding strip, and the operation of manufacturing a light reflection effect on the circular welding strip is difficult.

The tandem welding machine that this embodiment provided adopts above-mentioned calendering frock, in the subassembly production process, carries out calendering technology to the solder strip simultaneously, extrudes the reflection of light line with circular solder strip 10, has simplified the degree of difficulty of production, has still improved production efficiency.

In some optional embodiments, as shown in fig. 1 and fig. 2, the frame 13 is fixedly connected with a bolt (not shown in the drawings), the upper roller 1 is provided with a strip-shaped hole 3, the strip-shaped hole 3 extends along the extension direction of the piston rod of the cylinder, and the bolt is inserted into the strip-shaped hole 3 and moves along the extension direction of the strip-shaped hole 3. Bolt fixed mounting is in frame 13, and the cylinder drives and rolls 1 reciprocating motion to cause bar hole 3 and bolt relative displacement, the bolt is to rolling 1 effect of further direction on, avoids rolling 1 and takes place the offset at the removal in-process, and unable accurate alignment rolls 2 down, makes first welding strip contact surface 4 and second weld and takes 5 accurate correspondences in position, has further guaranteed the manufacturing accuracy who welds area 10.

In some alternative embodiments, continuing to refer to fig. 12 and 13, the lower extrusion 2 is provided with a connection block 6, the frame 13 is provided with a mounting slot 14, and the connection block 6 is inserted into the mounting slot 14. The lower rolling 2 is fixedly connected with the connecting block 6, and the lower rolling is of an integral structure formed in one step in the embodiment; the connecting block 6 is inserted into the mounting groove 14, the connecting block 6 and the mounting groove 14 can be in interference fit, the connecting block 6 is inserted into the mounting groove 14 and fixed, the lower rolling 2 is fixed, and the alignment accuracy of the positions of the upper rolling 1 and the lower rolling 2 is ensured; a gap can also exist between the connecting block 6 and the mounting groove 14, the mounting groove 14 is horizontally arranged, the connecting block 6 is inserted into the mounting groove 14, the upper rolling 1 presses the lower rolling 2 along the vertical direction, and the alignment accuracy of the positions of the upper rolling 1 and the lower rolling 2 can be ensured.

In some alternative embodiments, continuing to refer to fig. 12, the mounting groove 14 extends in a direction perpendicular to the axial direction of the solder strip 10, the mounting groove 14 being provided with a plurality of connection blocks 6 interposed in the extending direction. A plurality of lower calenders 2 can be arranged in the mounting groove 14, so that the series welding machine can process a plurality of welding strips 10 at the same time, the process time is saved, and the production efficiency is improved; one or more welding strips 10 can be placed on each lower rolling 2, and the number of the welding strips placed on the lower rolling 2 is enough to ensure that each welding strip 10 has enough space to be flattened, which is not specifically limited in this embodiment.

In some alternative embodiments, as shown in fig. 12 and 13, the frame 13 is provided with a limit baffle 12 for preventing the connecting blocks 6 from moving, and the limit baffle 12 is located between two adjacent connecting blocks 6. Limiting baffle 12 sets up between two adjacent connecting blocks 6, and fixed connection is on the edge of 14 wherein one side cell walls of mounting groove, avoids rolling 2 down and removes along the extending direction of mounting groove 14, and the alignment that calendering 1 can be accurate is rolled 2 down on guaranteeing, makes first welding take contact surface 4 and second to weld and take 5 positions of contact surface accurate correspondences, has further guaranteed the manufacturing accuracy who welds area 10.

Referring to fig. 14 and fig. 15, fig. 14 is a schematic structural diagram of a photovoltaic module provided in this embodiment; fig. 15 is a schematic structural diagram of another photovoltaic module provided in this embodiment, and with continued reference to fig. 5 to fig. 11, this embodiment further provides a photovoltaic module, including: the positive packaging layer 16, the first adhesive layer 17, the battery sheet layer 18, the second adhesive layer 19 and the back packaging layer 20 are arranged in a laminated manner; the rolling tool of any one of the above embodiments is used for manufacturing the welding strip 10 for connecting two adjacent battery pieces 9; the solder strip 10 has a reflection-flattened area 11, the reflection-flattened area 11 having a length in the axial direction of the solder strip 10 in the range of 6-12mm.

The photovoltaic module that this embodiment provided adopts above-mentioned calendering frock to make solder strip 10, establishes ties battery piece 9 through solder strip 10 and forms the battery cluster, and when the stringer, in the position of reflection of light flattening region 11, the stringer carries out the reflection of light to solder strip 10 and flattens, and later the battery cluster is established ties through bus bar 15 first, then connects in parallel through bus bar 15 again, and the reflection of light flattens the joining position of region at two adjacent battery pieces 9.

Specifically, if the axial length of the light reflecting and flattening area 11 along the welding strip 10 is less than 6mm, the length of the light reflecting and flattening area 11 is less than the distance between two adjacent battery pieces 9, the area of the contact part between the circular welding strip 10 and the battery pieces 9 is small, poor contact is easily caused, and the risk of hidden cracking of the battery pieces is caused, and meanwhile, the length of the light reflecting and flattening area 11 is too small, so that less reflected sunlight is caused, the sunlight received by the battery pieces 9 is reduced, and the conversion efficiency of the battery pieces 9 is reduced; if the axial length of the light reflecting and flattening area 11 along the welding strip 10 is greater than 12mm, the contact area between the light reflecting and flattening area 11 and the two adjacent battery pieces 9 is too large, so that the battery pieces 9 are shielded, the sunlight irradiation area of the battery pieces 9 is reduced, the battery pieces 9 are prevented from receiving sunlight, and the conversion efficiency of the battery pieces 9 is reduced; therefore, the range of the axial length of the light reflecting flattened area 11 along the solder strip 10 is 6-12mm, which not only can ensure the contact effect of the solder strip 10 and the cell 9, but also can avoid the influence on the sunlight receiving performance of the cell 9 and ensure the conversion efficiency of the cell 9. The crush zone 11 may be 6mm, 8mm, 10mm or 12mm along the axial length of the weld bead 10.

According to the above embodiment, the utility model provides a pair of calendering frock, stringer and photovoltaic module has realized following beneficial effect at least:

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

Claims

1. The utility model provides a calendering frock which characterized in that includes: the upper rolling and the lower rolling which is arranged corresponding to the upper rolling are carried out; the upper rolling is provided with a first welding strip contact surface, and the lower rolling is provided with a second welding strip contact surface; the first welding strip contact surface and the second welding strip contact surface are arranged oppositely; the first welding strip contact surface and/or the second welding strip contact surface are/is provided with a groove, the groove extends along a first direction and is communicated with the first welding strip contact surface and the second welding strip contact surface, and the first direction is parallel to the first welding strip contact surface and the second welding strip contact surface.

2. The rolling tool according to claim 1, wherein the cross section of the groove along the second direction is triangular, wavy or rectangular; the second direction is perpendicular to the first direction.

3. The calendaring tool according to claim 2, wherein when the cross section of the groove along the second direction is triangular, an included angle between two side walls of the groove is α, and 90 ° < α <180 °.

4. The calendaring tool according to claim 1, wherein an included angle between the first direction and an axial direction of the solder strip is β, and β is greater than or equal to 0 ° and less than or equal to 90 °.

5. A stringer, comprising: the rolling device comprises a frame, a cylinder connected with the frame and the rolling tool of any one of claims 1 to 4; the upper rolling is connected with a piston rod of the air cylinder, and the lower rolling is connected with the rack.

6. The series welding machine according to claim 5, wherein a bolt is fixedly connected to the frame, a strip-shaped hole is formed in the upper rolling, the strip-shaped hole extends along the extension direction of a piston rod of the air cylinder, and the bolt is inserted into the strip-shaped hole and moves along the extension direction of the strip-shaped hole.

7. A series welder according to claim 6, characterized in that the lower roller is provided with a connecting block, the frame is provided with a mounting groove, and the connecting block is inserted in the mounting groove.

8. A stringer according to claim 7, wherein said mounting groove extends in a direction perpendicular to an axial direction of said welding ribbon, and a plurality of said connecting pieces are inserted into said mounting groove in an extending direction.

9. A series welding machine according to claim 8, wherein a limit baffle for preventing the connecting blocks from moving is arranged on the machine frame, and the limit baffle is positioned between two adjacent connecting blocks.

10. A photovoltaic module, comprising: the battery comprises a positive packaging layer, a first bonding layer, a battery sheet layer, a second bonding layer and a back packaging layer which are arranged in a laminated manner; the welding strip is manufactured by the rolling tool of any one of claims 1 to 4 and is used for connecting two adjacent battery pieces; the solder strip is provided with a light reflecting and flattening area, and the range of the light reflecting and flattening area along the axial length of the solder strip is 6-12mm.