CN117102780A - Welding tool, series welding method of photovoltaic module and welding device - Google Patents

Welding tool, series welding method of photovoltaic module and welding device Download PDF

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Publication number
CN117102780A
CN117102780A CN202311116923.9A CN202311116923A CN117102780A CN 117102780 A CN117102780 A CN 117102780A CN 202311116923 A CN202311116923 A CN 202311116923A CN 117102780 A CN117102780 A CN 117102780A
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CN
China
Prior art keywords
welding
battery
tool
pressing part
battery pieces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311116923.9A
Other languages
Chinese (zh)
Inventor
徐本栋
秦年年
杨敬国
陶武松
王路闯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jinko Solar Co Ltd
Jinko Solar Haining Co Ltd
Original Assignee
Zhejiang Jinko Solar Co Ltd
Jinko Solar Haining Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Jinko Solar Co Ltd, Jinko Solar Haining Co Ltd filed Critical Zhejiang Jinko Solar Co Ltd
Priority to CN202311116923.9A priority Critical patent/CN117102780A/en
Publication of CN117102780A publication Critical patent/CN117102780A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The application relates to a welding tool, a welding method of a photovoltaic module and a welding device, wherein the welding tool is used for positioning welding of a welding strip on a battery piece, and the ratio L/W of the length L to the width W of the welding tool meets the following conditions: L/W is more than or equal to 5, and the width W of the welding tool meets the following conditions: w is more than or equal to 170mm. In the application, the length of the battery pieces is generally smaller than or slightly larger than 170mm, so that the width W of the welding tool is larger than or equal to 170mm, the ratio L/W of the length L of the welding tool to the width W is larger than or equal to 5, the welding tool can be matched with a plurality of battery pieces at the same time, and the welding strips on the plurality of battery pieces are fixed and positioned, so that the welding strips on the plurality of battery pieces can be welded, and the welding efficiency is improved. In addition, because the contact area of the welding tool and the battery piece is larger, the welding tool can effectively inhibit the battery piece from warping in the cooling process after welding, and the welding yield of the battery piece is improved.

Description

Welding tool, series welding method of photovoltaic module and welding device
Technical Field
The application relates to the technical field of photovoltaic modules, in particular to a welding tool, a series welding method of a photovoltaic module and a welding device.
Background
The photovoltaic module comprises a battery string, wherein the battery string is a plurality of battery pieces connected through welding strips. The welding strip is welded with the battery piece and mainly comprises two modes of electromagnetic welding and infrared welding. When in infrared welding, the welding tool is needed to press the welding strip on the battery piece, so that the welding strip is prevented from deviating relative to the battery piece, and the welding position is prevented from being wrong. The existing welding fixture can only fix the welding strip on one battery piece, so that the welding efficiency is low.
Disclosure of Invention
The application provides a welding tool, a series welding method of a photovoltaic module and a welding device.
The welding tool provided by the embodiment of the application is used for positioning welding of the welding strip on the battery piece, and the ratio L/W of the length L to the width W of the welding tool meets the following conditions: L/W is more than or equal to 5, and the width W of the welding tool meets the following conditions: w is more than or equal to 170mm.
In one possible design, the welding fixture comprises a welding unit, the welding unit is provided with a welding hole and a first pressing part, the welding hole is used for being correspondingly arranged with a welding spot on the battery piece, the first pressing part is arranged on two sides of the welding hole along the length direction of the welding fixture.
In one possible design, along the length direction of the welding tool, the first pressing portion located between two adjacent welding holes is offset from the middle position of the two adjacent welding holes.
In one possible design, the welding fixture is further provided with a second pressing portion, and the second pressing portion is disposed between two adjacent first pressing portions along the width direction of the welding fixture.
In one possible design, the second pressing portion is disposed near both edges of the welding unit along a length direction of the welding tool.
In one possible design, the second pressing portion has a larger size than the first pressing portion.
In one possible design, the ratio k of the diameter of the second pressing portion to the diameter of the first pressing portion satisfies: k is more than or equal to 1.2 and less than or equal to 3.
In one possible design, the diameter d of the second pressing portion satisfies: d is more than or equal to 3mm and less than or equal to 10mm.
The embodiment of the application provides a series welding method of a photovoltaic module, which comprises the following steps:
sequentially placing a plurality of battery pieces on a conveyor belt, and placing a welding belt on the battery pieces;
fixing the welding strips on the plurality of battery pieces through a welding tool, wherein the welding tool is the welding tool;
the conveying belt conveys the battery piece, the welding belt and the welding tool to the position below a welding head;
and the welding head welds the welding strip on the battery piece.
In one possible design, the welding fixture includes a plurality of welding units along a length of the welding fixture;
and when the welding strips on the battery pieces are fixed through the welding tool, one battery piece corresponds to one welding unit.
In one possible design, the welding unit completely covers the battery pieces when the welding strips on the plurality of battery pieces are fixed by a welding tool, and the welding tool completely covers all the battery pieces in the battery string.
In one possible design, the battery piece has a main grid and a welding spot, and the welding unit is provided with a welding hole, a first pressing part and a second pressing part;
when the welding strips on the battery pieces are fixed through the welding tool, the projection of the welding holes on the battery pieces coincides with the welding spots, the projection of the first pressing part on the battery pieces coincides with the main grid, and the projection of the second pressing part on the battery pieces is positioned between the adjacent main grids and is close to the edge of the battery pieces.
An embodiment of the present application provides a welding apparatus, including: the welding tool is the welding tool, the conveying belt is used for conveying the welding tool, the battery piece and the welding belt, and the welding head is used for welding the welding belt.
In the application, the length of the battery pieces is generally smaller than or slightly larger than 170mm, so that the width W of the welding tool is larger than or equal to 170mm, the ratio L/W of the length L of the welding tool to the width W is larger than or equal to 5, the welding tool can be matched with a plurality of battery pieces at the same time, and the welding strips on the plurality of battery pieces are fixed and positioned, so that the welding strips on the plurality of battery pieces can be welded, and the welding efficiency is improved.
In addition, because the contact area of the welding tool and the battery piece is larger, the welding tool can effectively inhibit the battery piece from warping in the cooling process after welding, and the welding yield of the battery piece is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
FIG. 1 is a schematic view of a photovoltaic module in one embodiment;
FIG. 2 is a partial top view of the battery string of FIG. 1;
FIG. 3 is a schematic view of a welding tool according to an embodiment of the present application;
FIG. 4 is an enlarged view of a portion of the structure of FIG. 3;
FIG. 5 is a flow chart of a method of series welding a photovoltaic module provided by the present application;
fig. 6 is a schematic structural diagram of a welding device according to an embodiment of the present application.
Reference numerals:
110-front side packaging structure;
120-front adhesive film;
130-battery strings;
140-a back adhesive film;
150-a backside packaging structure;
1-welding a tool;
11-welding holes;
12-a first pressing part;
13-a second pressing part;
14-a tool lug;
2-cell pieces;
21-welding spots;
22-main gate;
3-welding the tape;
4-a conveyor belt;
5-welding head.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Detailed Description
For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
As shown in fig. 1 and 2, the photovoltaic module is formed by laminating a front packaging structure 110, a front adhesive film 120, a battery string 130, a back adhesive film 140, and a back packaging structure 150, which are stacked in this order. The battery string 130 includes a battery plate 2 and a solder strip 3, a plurality of parallel main grids 22 are disposed on the surface of the battery plate 2, adjacent battery plates 2 are connected by the solder strip 3, and the solder strip 3 is electrically connected with the main grids 22.
Specifically, the main grid 22 is provided with a solder joint 21, and the solder joint 3 is electrically connected with the main grid 22 by soldering the solder joint 3 to the solder joint 21. The welding of the welding strip 3 and the welding spot 21 is generally infrared welding, and the welding strip 3 needs to be fixed on the surface of the battery piece 2 through the welding tool 1 during welding.
The embodiment of the application provides a welding tool 1 which is used for positioning welding of a welding strip 3 on a battery piece 2. As shown in fig. 3, the ratio L/W of the length L to the width W of the welding fixture 1 satisfies: L/W is more than or equal to 5, and the width W of the welding tool 1 meets the following conditions: w is more than or equal to 170mm. For example, the width W of the welding tool 1 may be 170mm, 175mm, 180mm, 185mm, etc., and the ratio L/W of the length L to the width W of the welding tool 1 may be 5, 5.1, 5.2, 5.3, 5.5, 6.0, etc.
In this embodiment, as shown in fig. 3, the length of the battery piece 2 is generally smaller than or slightly larger than 170mm, so that the width W of the welding tool 1 is greater than or equal to 170mm, and the ratio L/W of the length L to the width W of the welding tool 1 is greater than or equal to 5, so that the welding tool 1 can be matched with a plurality of battery pieces 2 at the same time, and the welding strips 3 on the plurality of battery pieces 2 are fixed and positioned, so that the welding strips 3 on the plurality of battery pieces 2 can be welded, and the welding efficiency is improved.
In addition, because the contact area between the welding tool 1 and the battery piece 2 is larger, the welding tool 1 can effectively inhibit the battery piece 2 from warping in the cooling process after welding, and the welding yield of the battery piece 2 is improved.
Specifically, when the welding fixture 1 is matched with the plurality of battery pieces 2, the battery pieces 2 are sequentially arranged along the length direction of the welding fixture 1, the long sides of the battery pieces 2 correspond to the short sides of the welding fixture 1, and the short sides of the battery pieces 2 correspond to the long sides of the welding fixture 1.
More specifically, the welding fixture 1 may be simultaneously matched with all the battery pieces 2 in one battery string 130, for example, the battery string 130 generally includes twelve battery pieces 2, and the welding fixture 1 may simultaneously fix and position the welding strips 3 on the twelve battery pieces 2, thereby completing series welding and obtaining the battery string 130.
In a specific embodiment, as shown in fig. 3 and 4, the welding fixture 1 includes a welding unit provided with a welding hole 11 and first pressing portions 12, the welding hole 11 is disposed corresponding to a welding spot 21 on the battery piece 2, and the first pressing portions 12 are disposed on both sides of the welding hole 11 along a length direction of the welding fixture 1.
In this embodiment, the welding units are sequentially arranged along the length direction of the welding tool 1, and one welding unit corresponds to one battery piece 2. It will be appreciated that there may be no physical welding unit on the welding fixture 1, and that the welding unit is only one area or region of the welding fixture 1 corresponding to the single battery piece 2.
As shown in fig. 3 and 4, the welding tool 1 is installed above the battery piece 2, the position of the welding hole 11 corresponds to the position of the welding spot 21, and the infrared light emitted by the welding head 5 irradiates the welding strip 3 through the welding hole 11, so that the welding strip 3 is welded at the position of the welding spot 21.
Along the length direction of welding frock 1, first pressing part 12 sets up in the both sides of welding hole 11, and first pressing part 12 presses welding strip 3 on battery piece 2 promptly, can prevent on the one hand that welding strip 3 from squinting relative battery piece 2, realizes the location of welding strip 3, on the other hand makes welding strip 3 and solder joint 21 fully contact, improves welded reliability degree, prevents to appear the condition of rosin joint, mistakes.
The welding hole 11 may have a circular shape, a rectangular shape, an elliptical shape, or the like, and is preferably circular. The number of first pressing portions 12 in one welding unit is more than the number of welding spots 21 on one battery piece 2.
Further, as shown in fig. 4, along the length direction of the welding tool 1, the first pressing portion 12 located between two adjacent welding holes 11 is located at a position offset from the middle position of the two adjacent welding holes 11.
In the present embodiment, as shown in fig. 4, the first pressing portion 12 located between the adjacent two welding holes 11 is located offset from the middle position of the adjacent two welding holes 11 such that the distance between the first pressing portion 12 and the welding hole 11 closest thereto is small, thereby further improving the pressing effect of the first pressing portion 12 on the solder strip 3 and preventing the solder strip 3 from being offset with respect to the battery piece 2.
In a specific embodiment, as shown in fig. 4, the welding tool 1 is further provided with a second pressing portion 13, and the second pressing portion 13 is disposed between two adjacent first pressing portions 12 along the width direction of the welding tool 1.
In the present embodiment, as shown in fig. 4, the second pressing portions 13 are disposed between two adjacent first pressing portions 12, that is, the second pressing portions 13 are in direct contact with the battery pieces 2, so that warpage of the battery pieces 2 can be effectively suppressed during cooling after welding, and the production yield of the battery string can be improved. A step of
Specifically, a welding tool in the prior art is used in series welding, and after the battery piece 2 is cooled, the warping height of the battery piece 2 is 4mm on average; when the welding tool 1 is used in series welding, after the battery piece 2 is cooled, the warping height of the battery piece 2 is 2mm on average. Therefore, the welding tool 1 provided by the application is used for series welding, so that the warping of the battery piece 2 can be effectively restrained, and the quality of the battery string 130 and the photovoltaic module can be improved.
Further, along the length direction of the welding tool 1, the second pressing portion 13 is disposed near both edges of the welding unit.
In this embodiment, one welding unit corresponds to one battery piece 2, and the second pressing portion 13 is disposed near two edges of the welding unit along the length direction of the welding tool 1, so that the second pressing portion 13 can be pressed at the edge position of the battery piece 2, thereby effectively suppressing the warpage of the battery piece 2.
More specifically, the height of the second pressing part 13 is higher than that of the first pressing part 12, and the difference in height between the two is close to the thickness of the solder strip 3, so that the acting force of the first pressing part 12 and the second pressing part 13 on the battery piece 2 is close, and the battery piece 2 is prevented from being damaged due to the excessive acting force of the first pressing part 12 or the second pressing part 13.
In a specific embodiment, as shown in fig. 4, the size of the second pressing portion 13 is larger than that of the first pressing portion 12.
In the present embodiment, as shown in fig. 4, the first pressing portion 12 presses against the solder ribbon 3, and therefore the size of the first pressing portion 12 is close to the width of the solder ribbon 3, so that the solder ribbon 3 can be positioned well. The second pressing portion 13 directly presses the battery piece 2, so that the size of the second pressing portion 13 is large, on one hand, the pressing effect of the second pressing portion 13 can be improved, the battery piece 2 is effectively prevented from being warped, and on the other hand, the pressure of the second pressing portion 13 acting on the surface of the battery piece 2 can be reduced, and the battery piece 2 is prevented from being damaged by the second pressing portion 13.
In a specific embodiment, the ratio k of the diameter of the second pressing portion 13 to the diameter of the first pressing portion 12 satisfies: k is more than or equal to 1.2 and less than or equal to 3. For example, the ratio k of the diameter of the second pressing portion 13 to the diameter of the first pressing portion 12 may be specifically 1.2, 1.4, 1.5, 1.8, 2.0, 2.5, 3.0, or the like.
In the present embodiment, the ratio k of the diameter of the second pressing portion 13 to the diameter of the first pressing portion 12 should not be too large or too small, and if the ratio k is too large (for example, greater than 3.0), the diameter of the second pressing portion 13 is too large or the diameter of the first pressing portion 12 is too small, which may cause the whole welding tool 1 to be too heavy or the positioning effect of the first pressing portion 12 on the welding belt 3 to be reduced; if the ratio k is too small (for example, less than 1.2), the diameter of the second pressing portion 13 is too small, which may result in the second pressing portion 13 not being able to effectively suppress the warpage of the battery sheet 2. Therefore, the ratio k of the diameter of the second pressing portion 13 to the diameter of the first pressing portion 12 should satisfy: k is more than or equal to 1.2 and less than or equal to 3.
Preferably, the ratio k of the diameter of the second pressing portion 13 to the diameter of the first pressing portion 12 is 2.
Specifically, as shown in fig. 4, the diameter d of the second pressing portion 13 satisfies: d is more than or equal to 3mm and less than or equal to 10mm. For example, the diameter d of the second pressing portion 13 may be specifically 3mm, 4mm, 5mm, 8mm, 10mm, or the like.
In the present embodiment, as shown in fig. 4, the diameter d of the second pressing portion 13 should not be too large nor too small, and if the diameter d of the second pressing portion 13 is too small (for example, less than 3 mm), the second pressing portion 13 cannot effectively suppress warping of the battery sheet 2; if the diameter d of the second pressing portion 13 is too large (e.g., greater than 3 mm), the whole welding fixture 1 is too heavy. Therefore, the diameter d of the second pressing portion 13 satisfies: when d is more than or equal to 3mm and less than or equal to 10mm, the whole welding tool 1 can be lighter while the warping of the battery piece 2 is effectively restrained.
Preferably, the diameter d of the second pressing portion 13 is 6mm.
In a specific embodiment, an elastic element is disposed in the first pressing portion 12, and when the first pressing portion 12 contacts the solder strip 3, the elastic element can adjust the overall height of the first pressing portion 12, so as to adjust the pressure of the first pressing portion 12 on the solder strip 3, and ensure the positioning effect on the solder strip 3. Similarly, an elastic element is also provided in the second pressing portion 13, so that the urging force of the second pressing portion 13 against the surface of the battery piece 2 is adjusted.
The embodiment of the application also provides a series welding method of the photovoltaic module, as shown in fig. 5, the series welding method comprises the following steps:
s1: a plurality of battery pieces 2 are sequentially placed on a conveyor belt 4, and a solder tape 3 is placed on the battery pieces 2.
In this step, when the battery pieces 2 are placed, the long sides of the battery pieces 2 are made to be close to the long sides of the adjacent battery pieces 2, so that the overall length of the plurality of battery pieces 2 is reduced, the length of the welding fixture 1 adapted to the battery pieces 2 can be reduced, and further transportation and storage of the welding fixture 1 are facilitated. When the solder strip 3 is placed, the solder strip 3 is placed along the extending direction of the main grid 22 on the battery piece 2, and at least part of the solder strip 3 covers the main grid 22.
Furthermore, this step may be accomplished by a human or robotic arm.
S2: the welding strips 3 on the plurality of battery pieces 2 are fixed through the welding fixture 1.
In this step, the welding tool 1 is placed on the battery piece 2, and the first pressing portion 12 of the welding tool 1 is in contact with the welding strip 3, so that the welding strip 3 is pressed against the main grid 22, the welding strip 3 cannot move relative to the battery piece 2, and positioning of the welding strip 3 is achieved.
S3: the conveying belt 4 conveys the battery piece 2, the welding belt 3 and the welding tool 1 to the position below the welding head 5.
In this step, the conveyor belt 4 transports the battery plate 2, the welding strip 3 and the welding tool 1 together under the welding head 5, ready for welding.
S4: the bonding head 5 bonds the bonding tape 3 to the battery piece 2.
In this step, the welding head 5 emits infrared light, the infrared light irradiates the welding strip 3 through the welding hole 11, after the welding strip 3 absorbs heat in the infrared light, tin on the surface layer of the welding strip melts and combines with the welding spot 21, and after the tin is cooled and solidified, the welding of the welding strip 3 and the welding spot 21 is completed.
In addition, the welding fixture 1 is further provided with fixture lugs 14, and the fixture lugs 14 are arranged on two sides of the welding unit along the broadband direction of the welding fixture 1. The tool lug 14 has magnetism or is connected with a magnetic substance, so that the tool lug can be attracted by an electromagnet, and the welding tool 1 can be conveniently carried.
Specifically, in step S2: when the welding tool 1 is used for fixing the welding strips 3 on the plurality of battery pieces 2, the welding unit completely covers the battery pieces 2, and the welding tool 1 completely covers all the battery pieces 2 in the battery string 130.
In this embodiment, be provided with insulating glue on battery piece 2 surface, the welding unit covers battery piece 2 completely and can effectively play thermal-insulated effect, and infrared light direct injection insulating glue when preventing the welding leads to insulating glue to produce yellowing even carbonization. The welding tool 1 completely covers all the battery pieces 2 in the battery strings 130, so that the welding head 5 can continuously weld the welding strips 3 on all the battery pieces 2 in one battery string 130, and the welding efficiency is further improved.
More specifically, step S2: when the welding tool 1 is used for fixing the welding strips 3 on the plurality of battery pieces 2, the projection of the welding holes 11 on the battery pieces 2 is overlapped with the welding spots 21, the projection of the first pressing part 12 on the battery pieces 2 is overlapped with the main grids 22, and the projection of the second pressing part 13 on the battery pieces 2 is positioned between the adjacent main grids 22 and is close to the edge of the battery pieces 2.
In this embodiment, after the welding fixture 1 is placed on the battery piece 2, the projection of the second pressing portion 13 on the battery piece 2 is located between the adjacent main grids 22, and the contact area between the welding fixture 1 and the battery piece 2 is increased by the second pressing portion 13, so that the warpage of the battery piece 2 can be effectively suppressed.
The embodiment of the application also provides a welding device for series welding of the photovoltaic module. As shown in fig. 6, the welding apparatus includes: the welding device comprises a conveying belt 4 and a welding head 5, wherein the conveying belt 4 is used for conveying a welding tool 1, a battery piece 2 and a welding belt 3, and the welding head 5 is used for welding the welding belt 3.
In this embodiment, as shown in fig. 6, the conveyor belt 4 can carry the battery pieces 2 and convey the battery pieces 2 to the lower part of the welding head 5 for welding, and after the welding is completed, convey the battery pieces 2 away from the lower part of the welding head 5, so that manual operation is reduced, efficiency of series welding is improved, and safety of workers is ensured. The welding head 5 can emit infrared light, and the infrared light carries energy, and the energy is absorbed by the welding strip 3 and then can melt tin on the surface layer of the welding strip, so that the welding of the welding strip 3 and the welding spots 21 on the surface of the battery piece 2 is realized.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (13)

1. The utility model provides a welding frock for the fixed-position welding of welding strip (3) on battery piece (2), its characterized in that, the length L of welding frock (1) satisfies with the ratio L/W of width W: L/W is more than or equal to 5, and the width W of the welding tool (1) meets the following conditions: w is more than or equal to 170mm.
2. The welding fixture according to claim 1, characterized in that the welding fixture comprises a welding unit, the welding unit is provided with a welding hole (11) and a first pressing part (12), the welding hole (11) is used for being arranged corresponding to a welding spot (21) on the battery piece (2), and the first pressing part (12) is arranged on two sides of the welding hole (11) along the length direction of the welding fixture (1).
3. Welding tool according to claim 2, characterized in that the first pressing part (12) located between two adjacent welding holes (11) is arranged offset from the middle position of two adjacent welding holes (11) along the length direction of the welding tool (1).
4. Welding tool according to claim 2, characterized in that the welding tool (1) is further provided with a second pressing part (13), which second pressing part (13) is arranged between two adjacent first pressing parts (12) in the width direction of the welding tool (1).
5. Welding fixture according to claim 4, characterized in that the second pressing part (13) is arranged close to both edges of the welding unit in the length direction of the welding fixture (1).
6. Welding tool according to claim 4, characterized in that the second pressing part (13) has a larger size than the first pressing part (12).
7. Welding tool according to claim 6, characterized in that the ratio k of the diameter of the second pressing part (13) to the diameter of the first pressing part (12) satisfies: k is more than or equal to 1.2 and less than or equal to 3.
8. Welding fixture according to claim 6, characterized in that the diameter d of the second pressing part (13) satisfies: d is more than or equal to 3mm and less than or equal to 10mm.
9. A method of series welding a photovoltaic module, the method comprising:
sequentially placing a plurality of battery pieces (2) on a conveyor belt (4), and placing a welding belt (3) on the battery pieces (2);
fixing the welding strips (3) on a plurality of battery pieces (2) through a welding tool (1), wherein the welding tool (1) is the welding tool (1) of any one of claims 1-8;
the conveying belt (4) conveys the battery piece (2), the welding belt (3) and the welding tool (1) to the position below a welding head (5);
the welding head (5) welds the welding strip (3) on the battery piece (2).
10. The series welding method of photovoltaic modules according to claim 9, characterized in that the welding fixture (1) comprises a plurality of welding units along the length direction of the welding fixture (1);
and when the welding tool (1) is used for fixing the welding strips (3) on the plurality of battery pieces (2), one battery piece (2) corresponds to one welding unit.
11. The series welding method of a photovoltaic module according to claim 10, wherein the welding unit completely covers the battery pieces (2) when the welding strips (3) on the plurality of battery pieces (2) are fixed by a welding tool (1), and the welding tool (1) completely covers all the battery pieces (2) in the battery string (130).
12. The series welding method of a photovoltaic module according to claim 10, characterized in that the battery sheet (2) has a main grid (22) and a welding spot (21), the welding unit being provided with a welding hole (11), a first pressing portion (12) and a second pressing portion (13);
when the welding tool (1) is used for fixing the welding strips (3) on the battery pieces (2), the projection of the welding holes (11) on the battery pieces (2) is overlapped with the welding spots (21), the projection of the first pressing part (12) on the battery pieces (2) is overlapped with the main grid (22), and the projection of the second pressing part (13) on the battery pieces (2) is positioned between the adjacent main grids (22) and is close to the edge of the battery pieces (2).
13. A welding device, the welding device comprising:
a welding fixture (1), the welding fixture (1) being a welding fixture (1) according to any one of claims 1-8;
the conveying belt (4) is used for conveying the welding tool (1), the battery piece (2) and the welding belt (3);
and the welding head (5) is used for welding the welding strip (3).
CN202311116923.9A 2023-08-31 2023-08-31 Welding tool, series welding method of photovoltaic module and welding device Pending CN117102780A (en)

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CN202311116923.9A CN117102780A (en) 2023-08-31 2023-08-31 Welding tool, series welding method of photovoltaic module and welding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311116923.9A CN117102780A (en) 2023-08-31 2023-08-31 Welding tool, series welding method of photovoltaic module and welding device

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CN117102780A true CN117102780A (en) 2023-11-24

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