CN109728117B - Grid welding strip, manufacturing method thereof, manufacturing device thereof and laminated tile assembly - Google Patents
Grid welding strip, manufacturing method thereof, manufacturing device thereof and laminated tile assembly Download PDFInfo
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- CN109728117B CN109728117B CN201811621287.4A CN201811621287A CN109728117B CN 109728117 B CN109728117 B CN 109728117B CN 201811621287 A CN201811621287 A CN 201811621287A CN 109728117 B CN109728117 B CN 109728117B
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- welding
- node
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- grid
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- 238000003466 welding Methods 0.000 title claims abstract description 104
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000003825 pressing Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052709 silver Inorganic materials 0.000 abstract description 15
- 239000004332 silver Substances 0.000 abstract description 15
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000004080 punching Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Photovoltaic Devices (AREA)
Abstract
The invention provides a grid welding strip, a manufacturing method thereof, a manufacturing device thereof and a shingle assembly. The back of the cell piece of the overlapped tile assembly is provided with dot back silver distributed in a grid shape, the whole back of each cell piece is welded with a grid welding strip, and junction nodes of the grid welding strip are welded with the dot back silver of the cell piece in a matched mode, so that the stress distribution of the welded cell piece is more uniform, the anti-hidden-crack capability of a cell string is improved, and even if the cell is hidden and cracked, current can still be transmitted through the welding strip, and the risk caused by hidden crack is reduced.
Description
Technical Field
The invention relates to the technical field of solar photovoltaic, in particular to a grid welding strip, a manufacturing method thereof, a manufacturing device thereof and a shingle assembly.
Background
With the development of photovoltaic technology, lamination technology becomes an important technical means for improving power of the assembly, and recently, the laminated tile type photovoltaic assembly is improved in power improvement of 20-30W by reducing the gaps of the battery pieces and increasing the area of the battery pieces for generating power in the same size of assembly model. However, in the current laminated tile assembly in the market, welding strips are not arranged between the battery pieces, two sides of the battery pieces are connected through conductive adhesive, the risk of cracking of the battery strings is high, and if one of the battery pieces in the battery strings is penetrated and hidden, the whole battery string is invalid, so that the power output of the assembly is affected.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a grid welding strip, a manufacturing method thereof, a manufacturing device thereof and a shingle assembly.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a grid welds area, its is used for welding at the back of photovoltaic module battery piece, including the horizontal area body of multiunit mutual parallel arrangement and the vertical area body of multiunit mutual parallel arrangement, horizontal area body and vertical area body staggered connection just form grid unit shape and the same size.
Compared with the prior art, the grid welding strip is combined with the dot electrode on the back of the battery piece, so that the stress distribution of the battery piece after welding is more uniform, the anti-hidden-crack capability of the battery string is improved, and even if the battery is hidden-cracked, current can still be transmitted through the welding strip, so that the risk caused by hidden-crack is reduced.
Further, grid cells formed by the transverse belts and the longitudinal belts are square, and the direction of one diagonal line of each grid cell is the same as the serial length direction of the photovoltaic module battery pieces.
By adopting the preferable scheme, the assembly convenience is improved, the longitudinal belt body and the transverse belt body form an angle of 45 degrees with the battery piece in the serial connection length direction, the strength of the battery piece in the width direction and the length direction is enhanced, and the hidden crack risk is further reduced.
Further, the bottom surfaces of the transverse belt body and the longitudinal belt body are positioned on the same plane, and the bottom surface of the joint at the junction of the transverse belt body and the longitudinal belt body protrudes 0.05mm-0.1mm beyond the bottom surfaces of the transverse belt body and the longitudinal belt body.
By adopting the preferable scheme, the grid welding strip nodes are more fully contacted with the back silver of the battery piece, and the welding performance is improved.
An apparatus for manufacturing a mesh welding strip, comprising:
the welding wire node stamping device is used for stamping equidistant flat parts on welding wires and comprises a first base, a first chuck, a second chuck, a punch and a plurality of stamping female dies, wherein the first chuck and the second chuck are arranged at two ends of the first base, two ends of the welding wires to be stamped are respectively clamped on the first chuck and the second chuck, the stamping female dies are arranged on the first base at equal intervals in a straight line, the distance between every two adjacent stamping female dies is equal to the side length of a single grid unit of a grid welding belt, the punch is matched with the stamping female dies, each stamping female die comprises a first side wall and a second side wall, a cavity for forming a node is arranged between the first side wall and the second side wall, and the welding wires to be stamped are arranged between the first side wall and the second side wall;
the welding wire pressing device is used for pressing welding wires into grid welding strips and comprises a second base, a pressing head and a plurality of node regulation units, wherein the node regulation units are distributed in a grid array, each node regulation unit comprises 4 guide posts distributed at equal intervals in a circumference, and the pressing head is matched with each node regulation unit.
By adopting the preferable scheme, the welding wire node stamping device is adopted to punch the node concave part on the welding wire, and then the welding wire pressing device is used for pressing the welding wire node concave part into a whole, so that the grid welding strip is simpler and more convenient to manufacture, the waste of materials is reduced, and the position precision of each node is also improved.
A manufacturing method of a grid welding strip comprises the following steps:
(1) Clamping a welding wire between a first chuck and a second chuck of a welding wire node stamping device, stamping in each stamping female die by adopting a punch, stamping a downwards concave node on the welding wire, wherein the downwards concave distance of the node is 1/3-1/2 of the thickness of the welding wire;
(2) Arranging the punched welding wires in a grid shape on a welding wire pressing device, wherein each node is clamped between guide posts of a node regulation unit; the concave surfaces of the two nodes are adhered and placed at the overlapped part of the two welding wires; and pressing the joints of the two welding wires into a whole by adopting a pressing head.
By adopting the preferable scheme, the joint of the grid welding strips is more fully combined, and the stress is small.
The utility model provides a fold tile subassembly, includes the multi-disc battery piece, the back of battery piece is the punctiform back silver that becomes latticed distribution, the whole back welding of every battery piece have the net weld area, the juncture node of net weld area and the punctiform back silver phase-match welding of battery piece, the battery piece adopts the fold tile mode to pile up, the department of piling up between the adjacent battery piece scribbles the conductive adhesive.
Further, the area of the single dot-shaped back silver on the back of the battery piece is 1-3mm 2 。
Further, grid cells formed by the grid welding strips are square, and the direction of one diagonal line of each grid cell is the same as the serial length direction of the photovoltaic module battery pieces.
By adopting the preferable scheme, the back silver on the back of the battery piece adopts a dot-shaped structure, so that the consumption of silver paste is reduced, the stress distribution of the grid welding strip after welding with the battery is more uniform, and the hidden crack resistance of the battery string is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of one embodiment of a mesh weld of the present invention;
FIG. 2 is a schematic view of an embodiment of a wire node stamping apparatus of the present invention;
FIG. 3 is a schematic view of one embodiment of a node stamped welding wire of the present invention;
FIG. 4 is a schematic top view of the structure of FIG. 3;
FIG. 5 is a schematic view of an embodiment of a welding wire pressing apparatus of the present invention;
FIG. 6 is an enlarged partial schematic view at A in FIG. 5;
FIG. 7 is a schematic view of the construction of the back side of the shingle assembly of the present invention;
fig. 8 is a schematic view of the construction of one embodiment of the shingle assembly of the present invention.
Names of the corresponding parts indicated by numerals and letters in the drawings:
1-a grid welding strip; 11-transverse belt body; 12-longitudinal strips; 13-node; 2-a welding wire node stamping device; 20-welding wires; 201-flat portion; 21-a first base; 22-a first chuck; 23-a second chuck; 24-stamping a female die; 241-a first sidewall; 242-a second sidewall; 3-a welding wire pressing device; 31-a second base; a 32-node regulation unit; 321-guide posts; 4-battery pieces; 41-punctiform back silver; 5-conductive adhesive.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a grid welding strip is used for welding on the back of a photovoltaic module battery piece, and comprises a plurality of groups of transverse strips 11 and a plurality of groups of longitudinal strips 12 which are arranged in parallel, wherein the transverse strips 11 and the longitudinal strips 12 are connected in a staggered manner, and the formed grid units have the same shape and size.
The beneficial effects of adopting above-mentioned technical scheme are: the grid welding strips are combined with the dot electrodes on the back of the battery piece, so that the stress distribution of the battery piece after welding is more uniform, the anti-hidden-crack capability of the battery string is improved, and even if the battery is hidden to crack, current can still be transmitted through the welding strips, so that the risk caused by hidden crack is reduced.
In other embodiments of the present invention, the grid cells formed by the transverse strips 11 and the longitudinal strips 12 are square, and one diagonal direction of the grid cells is the same as the serial length direction of the photovoltaic module battery pieces. The beneficial effects of adopting above-mentioned technical scheme are: the assembly convenience is improved, the longitudinal belt body and the transverse belt body form an angle of 45 degrees with the battery piece in the serial connection length direction, the strength of the battery piece in the width direction and the length direction is enhanced, and the hidden crack risk is further reduced.
In other embodiments of the present invention, the bottom surfaces of the transverse belt 11 and the longitudinal belt 12 are in the same plane, and the bottom surface of the junction between the transverse belt 11 and the longitudinal belt 12 is 0.05mm to 0.1mm protruding from the bottom surfaces of the transverse belt and the longitudinal belt. The beneficial effects of adopting above-mentioned technical scheme are: the grid welding strip nodes are in full contact with the back silver of the battery piece, and welding performance is improved.
In other embodiments of the present invention, as shown in fig. 2-6, an apparatus for manufacturing a mesh solder strip includes:
a welding wire node punching device 2 for punching out equidistant flat portions 201 on welding wires 20, comprising a first base 21, a first chuck 22, a second chuck 23, a punch (not shown) and a plurality of punching dies 24, wherein the first chuck 22 and the second chuck 23 are arranged at two ends of the first base 21, the two ends of the welding wires to be punched are respectively clamped on the first chuck 22 and the second chuck 23, the punching dies 24 are arranged on the first base 21 at equal intervals, the interval between adjacent punching dies 24 is equal to the side length of a single grid unit of a grid welding belt, the punch is matched with the punching dies 24, each punching die 24 comprises a first side wall 241 and a second side wall 242, a chamber for forming the flat portions 201 is arranged between the first side wall 241 and the second side wall 242, and the welding wires to be punched are arranged between the first side wall 241 and the second side wall 242;
the welding wire pressing device 3 is used for pressing welding wires 20 into the grid welding strip 1, and comprises a second base 31, a pressing head (not shown) and a plurality of node regulation units 32, wherein the node regulation units 32 are arranged in a grid array, the node regulation units 32 comprise 4 guide posts 321 distributed at equal intervals in a circumference, and the pressing head is matched with the node regulation units 32.
The beneficial effects of adopting above-mentioned technical scheme are: the welding wire node stamping device 2 is adopted to stamp out the flat part 201 with the concave node on the welding wire 20, and then the welding wire pressing device 3 is adopted to press the flat part into a whole, so that the grid welding strip is simpler and more convenient to manufacture, the waste of materials is reduced, and the position precision of each node is also improved.
A manufacturing method of a grid welding strip comprises the following steps:
(1) Clamping the welding wire 20 between a first chuck 22 and a second chuck 23 of the welding wire node stamping device 2, stamping in each stamping die 24 by adopting a punch, stamping a downward concave flat part 201 on the welding wire 20, wherein the downward concave distance of the flat part 201 is 1/3-1/2 of the thickness of the welding wire;
(2) Arranging the punched welding wires 20 in a grid shape on a welding wire pressing device, wherein each flat part 201 is clamped between guide posts 321 of the node regulation unit 32; the concave surfaces of the two flat parts are adhered and placed at the overlapped part of the two welding wires; and pressing the flat parts of the two welding wires into a whole by adopting a pressing head to form a connecting node of the grid welding strip.
The beneficial effects of adopting above-mentioned technical scheme are: the joint of the grid welding strip is more fully combined, and the stress is small.
As shown in fig. 7 and 8, a shingle assembly comprises a plurality of battery pieces 4, wherein the back surfaces of the battery pieces 4 are dot back silver 41 distributed in a grid shape, grid welding strips 1 are welded on the whole back surface of each battery piece 4, nodes 13 at the junctions of the grid welding strips 1 are welded in a matched mode with the dot back silver 41 of the battery piece 4, the battery pieces 4 are stacked in a shingle mode, and conductive adhesive 5 is coated at the stacking positions between the adjacent battery pieces 4; the area of the single dot-shaped back silver 41 on the back of the battery piece is 1-3mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The grid unit formed by the grid welding strips 1 is square, and the direction of a diagonal line of the grid unit is the same as the serial length direction of the photovoltaic module battery pieces 4. The beneficial effects of adopting above-mentioned technical scheme are: the back silver on the back of the battery piece adopts a dot-shaped structure, so that the consumption of silver paste is reduced, the stress distribution of the grid welding strip and the battery after welding is more uniform, and the hidden crack resistance of the battery string is improved.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, but not limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (2)
1. A manufacturing apparatus for a mesh welding strip, comprising:
the welding wire node stamping device is used for stamping equidistant flat parts on welding wires and comprises a first base, a first chuck, a second chuck, a punch and a plurality of stamping female dies, wherein the first chuck and the second chuck are arranged at two ends of the first base, two ends of the welding wires to be stamped are respectively clamped on the first chuck and the second chuck, the stamping female dies are arranged on the first base at equal intervals in a straight line, the distance between every two adjacent stamping female dies is equal to the side length of a single grid unit of a grid welding belt, the punch is matched with the stamping female dies, each stamping female die comprises a first side wall and a second side wall, a cavity for forming a node is arranged between the first side wall and the second side wall, and the welding wires to be stamped are arranged between the first side wall and the second side wall;
the welding wire pressing device is used for pressing welding wires into grid welding strips and comprises a second base, a pressing head and a plurality of node regulation units, wherein the node regulation units are distributed in a grid array, each node regulation unit comprises 4 guide posts distributed at equal intervals in a circumference, and the pressing head is matched with each node regulation unit.
2. A method for manufacturing a mesh welding strip, characterized in that the manufacturing device for the mesh welding strip according to claim 1 comprises the following steps:
(1) Clamping a welding wire between a first chuck and a second chuck of a welding wire node stamping device, stamping in each stamping female die by adopting a punch, stamping a downwards concave node on the welding wire, wherein the downwards concave distance of the node is 1/3-1/2 of the thickness of the welding wire;
(2) Arranging the punched welding wires in a grid shape on a welding wire pressing device, wherein each node is clamped between guide posts of a node regulation unit; the concave surfaces of the two nodes are adhered and placed at the overlapped part of the two welding wires; and pressing the joints of the two welding wires into a whole by adopting a pressing head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621287.4A CN109728117B (en) | 2018-12-28 | 2018-12-28 | Grid welding strip, manufacturing method thereof, manufacturing device thereof and laminated tile assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621287.4A CN109728117B (en) | 2018-12-28 | 2018-12-28 | Grid welding strip, manufacturing method thereof, manufacturing device thereof and laminated tile assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109728117A CN109728117A (en) | 2019-05-07 |
| CN109728117B true CN109728117B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811621287.4A Active CN109728117B (en) | 2018-12-28 | 2018-12-28 | Grid welding strip, manufacturing method thereof, manufacturing device thereof and laminated tile assembly |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111584662B (en) * | 2019-08-20 | 2023-10-17 | 沃沛斯(常州)能源科技有限公司 | Photovoltaic cell serial connection method |
| CN114171618A (en) * | 2021-11-12 | 2022-03-11 | 无锡奥特维科技股份有限公司 | Solar cell module, production method and production equipment thereof |
| CN114512564A (en) * | 2021-12-10 | 2022-05-17 | 无锡奥特维科技股份有限公司 | Battery string, serial connection method thereof and serial connection equipment |
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| CN109728117A (en) | 2019-05-07 |
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