CN218101284U

CN218101284U - Sectional tinning welding strip for large-sized battery piece

Info

Publication number: CN218101284U
Application number: CN202221203611.2U
Authority: CN
Inventors: 陈庆谊; 张卫兵; 常鹏雄; 高林
Original assignee: Xi'an Telison New Materials Co ltd
Current assignee: Xi'an Telison New Materials Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-12-20
Anticipated expiration: 2032-05-19

Abstract

The utility model discloses a big specification battery piece is with segmentation tin-plating solder strip relates to photovoltaic solder strip technical field, include that the continuous circulation that alternates along length direction sets up to two adjacent battery pieces weld the area unit, weld the area unit and include circle solder strip section, shrink changeover portion and flat thin solder strip section, the right-hand member and the shrink changeover portion left end of circle solder strip section are connected, and shrink changeover portion right-hand member and flat thin solder strip section left end are connected. The welding strip formed by combining the circular welding strip section, the contraction transition section and the flat thin welding strip section is adopted, so that the problems that the edges of the battery pieces are hidden and broken after the welding strip is used and the like are solved, and the effect of reducing the distance between the battery pieces is achieved.

Description

Sectional tinning welding strip for large-sized battery piece

Technical Field

The utility model relates to a photovoltaic solder strip technical field, concretely relates to big specification battery piece is with segmentation tin-plating solder strip.

Background

The photovoltaic module is a component capable of converting solar energy into electric energy, and the welding strip is used for guiding and converging the current, so that the welding strip directly influences the current collection efficiency of the photovoltaic module, and the influence on the power of the photovoltaic module is great.

At the present stage, the whole strip of the multi-main-gate battery piece is a photovoltaic welding strip with a pure circular section, and a series connection form of the welding strip between the anode of one battery piece and the cathode of the other battery piece is adopted, but along with the continuous reduction of the distance between the battery piece and the battery piece in the assembly, if the pure circular integral welding strip is continuously used, the diameter is reduced to adapt. At the same time, however, if the diameter of the tinned copper tape is further reduced to reduce the shading area, the series resistance of the module may be increased. If the cell gap is designed to be too small, the welding strip is led from the front side of one cell to the back side of the other cell, and the compression stress of a bending structure exists among the cells, so that the problem of hidden cracking of the edges of the cells and the like can be caused.

Therefore, there is a need for a solder ribbon that provides a very small cell spacing during series bonding of MBB multi-master-gate cells without causing damage to the cells.

Disclosure of Invention

For solving above technical problem, the utility model aims at providing a big specification battery piece is with segmentation tin-plating solder strip, can reduce between the battery piece apart from effectively solving traditional pure circle simultaneously and weld the strip and use the back battery piece edge and take place hidden breakage damage scheduling problem easily.

In order to achieve the purpose, the utility model adopts the following technical scheme to solve the problem.

The utility model provides a big specification battery piece is with segmentation tin-plating welding strip, includes that along the continuous circulation setting in turn of length direction carry out the welding that connects two adjacent battery pieces and take the unit, it includes circle welding strip section, shrink changeover portion and flat thin welding strip section to weld the area unit, the circle weld the right-hand member of taking the section with the shrink changeover portion left end is connected, shrink changeover portion right-hand member with flat thin welding strip section left end is connected.

Furthermore, the axis of the circular welding strip section and the central line of the flat thin welding strip section along the length direction are collinear, the left end face of the contraction transition section is the same as the right end face of the circular welding strip section in size, and the right end face of the contraction transition section is the same as the left end face of the flat thin welding strip section in size.

Further, the left end face of shrink changeover portion with the right-hand member face size of circle welding tape section is the same, the right-hand member face of shrink changeover portion with the left end face size of flat thin welding tape section is the same, just the lower surface of shrink changeover portion with the downside of circle welding tape section the downside of flat thin welding tape section is on same horizontal plane.

Further, the circular welding strip section comprises a tin coating and an internal copper wire, and the cross section of the copper wire is circular or regular octagon.

The utility model discloses technical scheme welds the area through the transition that adopts circular welding area to add two-sided shrink or single face shrink form and welds the area of welding that the area combines to form with the rectangle is thin to solve to weld and take use the hidden damage scheduling problem that splits in back battery piece edge, reach the effect of distance between the reduction battery piece simultaneously, thereby more battery pieces can be placed to same size subassembly, increase subassembly generated power, and reduced subassembly design length, reduce the cost of non-silicon material.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a conventional interconnection method between a solder strip and a battery plate;

FIG. 2 is a top view of the double-sided shrinkage transition segmented solder strip of the present invention;

FIG. 3 is a front view of the double-sided shrinkage transition segmented weld zone of the present invention;

FIG. 4 is a top view of the single-side shrinkage transition segmented solder strip of the present invention;

FIG. 5 is a front view of the single-side shrinkage transition sectional weld zone of the present invention;

FIG. 6 is a state diagram of the double-sided shrinkage transition sectional welding strip of the present invention in use;

FIG. 7 is a state diagram of the single-side shrinkage transition sectional welding strip of the present invention in use;

fig. 8 is a schematic cross-sectional view of the internal copper wire of the circular solder strip section of the present invention.

In the above figures: 1. a battery piece; 2. a solder strip unit; 21. circular welding of the strip section; 22. a converging transition section; 23. a flat thin solder ribbon section.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not to be limited by the specific embodiments disclosed below.

Referring to fig. 1, 6 and 7, a sectional tin-plating welding strip for large-size battery plates comprises a welding strip unit 2 which is continuously arranged along the length direction in an alternating and circulating mode and is used for connecting two adjacent battery plates 1, wherein the welding strip unit 2 comprises a circular welding strip section 21, a shrinkage transition section 22 and a flat thin welding strip section 23, the right end of the circular welding strip section 21 is connected with the left end of the shrinkage transition section 22, and the right end of the shrinkage transition section 22 is connected with the left end of the flat thin welding strip section 23.

In the above embodiment, two adjacent battery pieces 1 can be connected through the welding strip body, the circular welding strip section 21 is placed above the left battery piece 1, the right end of the circular welding strip section 21 is connected with the left end of the contraction transition section 22, the right end of the contraction transition section 22 is connected with the left end of the flat thin welding strip, the flat thin welding strip section 23 is in a Z shape, the vertical section of the flat thin welding strip section 23 is located in the gap between the two battery pieces 1, the thickness of the flat thin welding strip section 23 is the same as the width of the gap between the two battery pieces 1, so that the distance between the two battery pieces 1 is small enough, the left end of the flat thin welding strip section 23 is located above the left battery piece 1, and the right end of the flat thin welding strip section 23 is located below the right battery piece 1, therefore, the contact area between the flat thin welding strip section 23 and the right battery piece 1 can be increased by a little compared with the conventional pure circular welding strip, and the conversion efficiency between components is improved. The rectangular thin welding strips in the plurality of circularly arranged welding strip units 2 are the same and are positioned on the same horizontal line, and are perpendicular to the circular welding strips, the shapes of the contraction transition sections 22 are the same, the lengths of the contraction transition sections are the same, the diameter of the circular welding strip section 21 is 0.2-0.4 mm, and the length of the circular welding strip section is 80-120 mm +/-1 mm; the length of the contraction transition section 22 is 0.5 mm-1.5 mm +/-1 mm; the width of the rectangular welding strip section is 0.5-1.0 mm, the thickness is 0.1-0.2 mm, and the length is the length of the circular welding strip section 21 and the transition section subtracted from the circulating length. The three-section circulation length is 150-210 mm +/-1 mm.

Further, referring to fig. 2, 3 and 6, the axis of the circular solder strip section 21 is collinear with the central line of the flat thin solder strip section 23 along the length direction, the left end face of the contraction transition section 22 is the same size as the right end face of the circular solder strip section 21, and the right end face of the contraction transition section 22 is the same size as the left end face of the flat thin solder strip section 23.

In the above embodiment, the welding strip unit 2 with the structure is a double-sided shrinkage transition segmented welding strip, and the formed shrinkage transition section 22 gradually shrinks from the circular welding strip section to the flat thin welding strip section 23, so that the material consumption is reduced and the cost is reduced compared with the conventional pure circular welding strip.

Further, referring to fig. 4, 5 and 7, the left end face of the shrinkage transition section 22 is the same as the right end face of the circular welding strip section 21, the right end face of the shrinkage transition section 22 is the same as the left end face of the flat thin welding strip section 23, and the lower surface of the shrinkage transition section 22 is on the same horizontal plane with the lower side face of the circular welding strip section 21 and the lower side face of the flat thin welding strip section 23.

In the above embodiment, the welding strip unit 2 with the structure is a single-side shrinkage transition sectional welding strip, and because the lower surface of the shrinkage transition section 22 is on the same horizontal plane with the lower side surfaces of the circular welding strip section 21 and the flat thin welding strip section 23, when two adjacent battery pieces 1 are connected, the lower side surface of the shrinkage transition section 22 can be closely attached to the surface of the battery piece 1 to form a stable support, so that the damage rate of the shrinkage transition section 22 in the using process is reduced, the material usage amount is reduced to a certain extent compared with the traditional pure circular welding strip, and the cost is saved.

Further, referring to fig. 8, the circular solder strip section 21 includes a tin-plated layer and an internal copper wire, and the cross section of the copper wire is circular or regular octagonal.

In the above examples, this facilitates the production and processing of the raw materials.

The utility model discloses a theory of operation: can couple together two adjacent battery pieces 1 through welding the unit 2 body of taking, circle welding strip section 21 is placed in battery piece 1 top on the left side, and the right-hand member of circle welding strip section 21 is connected with shrink changeover portion 22 left end, and shrink changeover portion 22 right-hand member is connected with flat thin welding strip section 23 left end, and flat thin welding strip section 23 is the Z shape, and the vertical section of flat thin welding strip section 23 is located two in the clearance between battery piece 1, the thickness of flat thin welding strip section 23 and two clearance width between battery piece 1 is the same, can ensure like this that the distance between two battery pieces 1 is enough little, and the left end of flat thin welding strip section 23 is located battery piece 1 top on the left side, and the right-hand member of flat thin welding strip section 23 is located the below of battery piece 1 on the right, and the contact area of flat thin welding strip section 23 and battery piece 1 on the right also can compare traditional pure circle welding strip increase a lot like this to improve the conversion efficiency between the subassembly.

Although the invention has been described in detail in this specification by way of general description and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a big specification battery piece is with segmentation tin-plating welds area, includes that along length direction continuous alternate cycle set up two adjacent battery pieces (1) connect weld take unit (2), its characterized in that, it includes that circle welds area section (21), shrink changeover portion (22) and flat thin welding area section (23) to weld take unit (2), the circle weld the right-hand member of area section (21) with shrink changeover portion (22) left end is connected, shrink changeover portion (22) right-hand member with flat thin welding area section (23) left end is connected.

2. The sectional tinning welding strip for the large-size battery piece is characterized in that the axis of the circular welding strip section (21) is collinear with the central line of the flat thin welding strip section (23) in the length direction, the left end face of the shrinkage transition section (22) is the same as the right end face of the circular welding strip section (21), and the right end face of the shrinkage transition section (22) is the same as the left end face of the flat thin welding strip section (23).

3. The sectional tin-plating welding strip for the large-size battery piece is characterized in that the left end face of the shrinkage transition section (22) is the same as the right end face of the circular welding strip section (21), the right end face of the shrinkage transition section (22) is the same as the left end face of the flat thin welding strip section (23), and the lower surface of the shrinkage transition section (22) is on the same horizontal plane with the lower side face of the circular welding strip section (21) and the lower side face of the flat thin welding strip section (23).

4. The large-size battery piece sectional tin plating welding strip as claimed in claim 1, wherein the circular welding strip section (21) comprises a tin plating layer and internal copper wires, and the cross section of the copper wires is circular or regular octagonal.