CN217214735U - Composite solder strip, battery string and photovoltaic module - Google Patents

Abstract

The utility model provides a compound solder strip, battery cluster and photovoltaic module. The composite welding strip comprises a first film layer, a second film layer and a welding strip clamped between the first film layer and the second film layer, wherein the first film layer is provided with a first opening part and a first non-opening part, the first opening part is provided with n spaced first opening groups, and each first opening group comprises m openings arranged along a first direction ₁ The first openings are arranged along a second direction, and the first direction is vertical to the second direction; first, theThe two film layers have a structure similar to that of the first film layer, but the first hole parts and the second hole parts of the second film layer are arranged correspondingly, and the first hole parts and the second hole parts are arranged correspondingly; each welding strip extends along the first direction, and any one welding strip is arranged corresponding to the first opening group and the second opening group which are positioned on the same straight line, so that the positions of the welding strips corresponding to the first opening and/or the second opening are exposed. The welding strip is prevented from deviating from the welding spot during welding.

Description

Composite solder strip, battery string and photovoltaic module

Technical Field

The utility model relates to the field of photovoltaic technology, particularly, relate to a compound solder strip, battery cluster and photovoltaic module.

Background

In the production of solar cell modules, solar cells are welded into strings, and at present, a plurality of welding strips are respectively welded with main grid lines and/or welding spots on the front and back sides of the solar cells to obtain a cell string formed by connecting a plurality of cells in series. However, in the existing series welding process, the position of the welding strip deviates relative to the battery piece, so that the position of the welding strip is not aligned with the position of the main grid line, and the welding effect is not good. Although the main grid line is not needed in the battery piece process, the welding strip still needs to be aligned with the welding point of the battery piece, and due to the fact that the requirement for the accuracy of the welding point is higher, the more serious offset problem exists in series welding.

However, in the prior art, only the position guide problem during the solder strip laying is considered, and the position deviation condition occurring in the soldering process after the solder strip is placed is not considered.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a compound solder strip, battery cluster and photovoltaic module to solve among the prior art the problem of solder strip skew when welding with the solder joint.

In order to achieve the above object, according to an aspect of the present invention, there is provided a composite welding strip, which comprises a first film layer, a second film layer and a welding strip clamped between the first film layer and the second film layer, wherein the composite welding strip is composed of one or more film group units, each of the film group units has a first opening portion and a first non-opening portion, the first opening portion has n spaced first opening groups, each of the first opening groups includes m arranged along a first direction ₁ A first opening, the first opening group is arranged along a second direction, the first direction is perpendicular to the second direction, and m is ₁ And n are positive integers; first, theThe second film layer has a second opening part and a second non-opening part, the second opening part has n spaced second opening groups, each second opening group includes m arranged along the first direction ₂ A plurality of second openings arranged along the second direction, wherein the second openings and the first openings are in one-to-one correspondence on a straight line along the first direction, and m is ₂ The first non-opening part and the second non-opening part are correspondingly arranged; each welding strip extends along the first direction, and any one welding strip is arranged corresponding to the first opening group and the second opening group which are positioned on the same straight line, so that the positions of the welding strips corresponding to the first opening and/or the second opening are exposed.

Further, the first opening and the second opening are each independently any one of a circular opening, an oval opening, a racetrack-shaped opening, and a strip-shaped opening.

Further, the shapes of the first opening and the second opening are matched with the pattern of the welding point position of the battery piece to be welded.

Further, when the part to be welded on the battery piece is the solid main grid, the first opening and the second opening are strip-shaped openings or runway-shaped openings; or when the object to be welded on the battery piece is a bonding pad, the first opening and the second opening are circular openings or oval openings.

Further, in the same membrane module unit, the first opening portion includes one or more first opening module units arranged along the second direction, and each first opening module unit includes a plurality of first opening modules arranged along the second direction; the second opening part comprises one or more second opening group units arranged along the second direction, and each second opening group unit comprises a plurality of second opening groups arranged along the first direction.

Furthermore, the composite welding strip is a Z-shaped composite welding strip, the first perforated part and the first non-perforated part are arranged at intervals through the first spacing part, and the first perforated part, the first spacing part and the first non-perforated part form a Z shape; the second perforated portion and the second non-perforated portion are arranged at intervals through the second spacing portion, and the second perforated portion, the second spacing portion and the second non-perforated portion form a zigzag shape.

According to the utility model discloses an on the other hand provides a battery string, and this battery string includes: the battery pack comprises a plurality of battery pieces, welding spots are arranged on the first surface and the second surface of each battery piece, the battery pieces are divided into p battery piece units, each battery piece unit consists of one battery piece or s battery pieces, p and s are positive integers, one or more composite welding strips of any one of the battery pieces are arranged, each composite welding strip consists of one membrane group unit, any one composite welding strip corresponds to two adjacent battery piece units to form a basic string unit, one battery piece unit in the basic string unit corresponds to the first opening part of the composite welding strip, the welding strip of the composite welding strip corresponds to the welding point on the first surface of each battery cell of the battery cell unit through the first opening of the first opening part, the other battery cell unit in the basic string unit corresponds to the second opening part of the composite welding strip, and the welding strip of the composite welding strip corresponds to the welding point on the second surface of each battery cell of the battery cell unit through the second opening of the second opening part.

Further, the number of the basic string units is one or more, and when the number of the basic string units is multiple, and in two adjacent basic string units, the composite welding strip of one basic string unit corresponds to one surface of one battery sheet unit, and the composite welding strip of the other basic string unit corresponds to the other surface of the same battery sheet unit.

Further, in the composite solder strip, the first hole portion includes a first hole group unit along one line, the first hole group unit corresponds to the battery piece, and the first hole group unit includes a plurality of first hole groups arranged along the second direction; the second opening part includes a second opening group unit corresponding to the battery cell, and the second opening group unit includes a plurality of second opening groups arranged in the second direction.

Further, in the composite solder strip, the first opening part comprises a plurality of first opening group units arranged along the second direction, each first opening group unit corresponds to the battery piece one by one, and each first opening group unit comprises a plurality of first opening groups arranged along the second direction; the second opening part comprises a plurality of second opening group units which are arranged along the second direction, each second opening group unit corresponds to the battery piece one by one, and each second opening group unit comprises a plurality of second opening groups which are arranged along the first direction.

According to the utility model discloses a still another aspect provides a photovoltaic module, this photovoltaic module includes front bezel, above-mentioned any kind of battery cluster, backplate, and photovoltaic module still includes the seal membrane that sets up at battery cluster head and the tail both ends in the first direction, and the seal membrane covers the battery surface that battery cluster head and the tail both ends are not covered by the compound solder strip.

Use the technical scheme of the utility model, when laying and welding the area, weld the area by first rete, second rete location centre gripping between the bilayer membrane to can carry out the check-up to laying whether accurate location of each welding the area via first trompil and second trompil, the welding area of being fixed a position the deviation also can be adjusted into no deviation state via first trompil and second trompil simultaneously, welds the area by accurate positioning in the area in the complex welding. When the compound solder strip of double-layer film centre gripping solder strip was used, only need with the solder strip that the solder strip corresponds first trompil and second trompil spill the part with the solar wafer wait to weld the position butt welding can, because the solder strip is by the centre gripping double-layer film structure, the solder strip can not produce the skew after the alignment in the location, follow-up welding and hot pressing process all can carry out the technology under the condition of strict alignment, the welding precision of subassembly production technology obtains obviously promoting, avoid appearing welding skew, rosin joint, EL blackens the scheduling problem.

Simultaneously, the compound solder strip of this application only leaks in the solder strip, after the series welding is accomplished, the one side of cell piece body is kept away from with the back surface to the front surface of every piece battery, all cover by the rete structure completely, the rete structure of adjacent piece fuses each other after the lamination, also be covered by the rete completely between adjacent cell piece, the adjacent cluster clearance part of battery cluster is after the lamination promptly, battery piece side part is also covered the protection by the rete completely, thereby can reduce the damage to the battery piece to the stress that the battery piece side produced like this. The utility model discloses compound solder strip is in the subassembly production to need not incline at backplate/glass and additionally increase the encapsulation rete, can realize the sealed encapsulation of battery piece.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a side view of a membrane module unit structure of a composite solder strip according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating the respective structures and corresponding relationships of a first film layer and a second film layer of a film group unit of the composite solder strip shown in FIG. 1;

FIG. 3 illustrates a top view of a composite weld bead according to an embodiment of the present invention;

FIG. 4 illustrates a top view of a composite weld bead according to another embodiment of the present invention;

fig. 5 is a schematic perspective view of a film assembly unit of a composite solder strip according to an embodiment of the present invention, in which the solder strip is not shown

Fig. 6 shows a side view of a composite solder strip and battery sheet units assembled to form a battery string in accordance with an embodiment of the present invention;

fig. 7 is a schematic perspective view of the battery string shown in fig. 6;

fig. 8 shows a top view of a battery string formed using the composite solder strip of fig. 3 with battery pieces;

fig. 9 shows a top view of a battery string formed using the composite solder strip of fig. 4 with battery pieces;

fig. 10 illustrates a top view of an array of cell strings in a photovoltaic module according to an embodiment of the present invention;

fig. 11 shows a top view of an array of cell strings in a photovoltaic module according to another embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. a first film layer; 11. a first opening portion; 12. a first non-perforated portion; 111. a first group of openings; 1111. a first opening; 11-A, a first opening group unit;

2. welding a strip;

3. a second film layer; 31. a second opening portion; 32. a second non-perforated portion; 331. a second group of openings; 3111. a second opening; 31-A, a second opening group unit;

100. compounding a welding strip;

02. a battery piece.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As analyzed by the background of the present application, the prior art has a problem of deviation from the solder joint when the solder ribbon is soldered. In order to solve the problem, the application provides a composite solder strip, a battery string and a photovoltaic module.

In an exemplary embodiment of the present application, a composite solder strip is provided, as shown in fig. 1 and 2, comprising a first film layer 1, a second film layer 3, and a solder strip 2 sandwiched between the first film layer 1 and the second film layer 3, the composite solder strip being composed of one or more film group units, each film group unit having a first film layer 1 having a first opening portion 11 and a first non-opening portion 12, the first opening portion 11 having n spaced first opening groups 111, each first opening group 111 including m in a first direction ₁ A first opening 1111 in which the first opening group 111 is arranged along a second direction perpendicular to the first direction, wherein m ₁ And n are positive integers; the second film layer 3 has a second opening part 31 and a second non-opening part 32, the second opening part 31 has n spaced second opening groups 311, each second opening group 311 includes m arranged in the first direction ₂ A plurality of second openings 3111, the second opening sets 311 are arranged along the second direction, the second opening sets 311 are corresponding to the first opening sets 111 one by one along the first direction and are positioned on a straight line, wherein m ₂ Positive integers are provided, the first perforated portion 11 and the second non-perforated portion 32 are disposed correspondingly, and the first non-perforated portion 12 and the second perforated portion 31 are disposed correspondingly; each of the solder ribbons 2 extends in a first direction, and any one of the solder ribbons 2 is disposed in correspondence with the first opening group 111 and the second opening group 311 on the same straight line so that the solder ribbon 2 corresponds to the first openingThe location of the hole 1111 and/or the second aperture 3111 is exposed.

Because the compound solder strip structure that this application provided, lay and weld and take 2, weld and take 2 by first rete 1, the 3 location centre gripping of second rete between the bilayer membrane to can check whether accurate location of laying of each solder strip 2 is carried out through first trompil 1111 and second trompil 3111, the solder strip 2 of location deviation also can be adjusted into through first trompil 1111 and second trompil 3111 to no deviation state simultaneously, weld and take 2 by accurate positioning in compound solder strip. When the compound solder strip of taking 2 is welded in double-layer film centre gripping, only need with weld take 2 and correspond first trompil 1111 and second trompil 3111 weld take 2 to spill partly with the solar wafer 02 wait that the position of welding counterpoint weld can, because weld take 2 by the centre gripping double-layer film structure, weld take 2 can not produce the skew after the location alignment, follow-up welding and hot pressing process all can be in the execution technology under the condition of strict alignment, the welding precision of subassembly production technology obtains obvious promotion, avoid appearing welding the skew, the rosin joint, EL blackens the scheduling problem.

Simultaneously, the compound solder strip of this application only leaks by solder strip 2, after the series welding is accomplished, the one side of cell 02 body is kept away from on the front surface and the back surface of every piece battery, all cover by membranous layer structure completely, the membranous layer structure of adjacent piece fuses each other after the lamination, also be covered by membranous layer completely between adjacent cell 02, the adjacent cluster clearance part of battery cluster is after the lamination promptly, cell 02 side part is also covered the protection by membranous layer completely, thereby can reduce the damage to cell 02 side to the stress that produces like this. The utility model discloses compound area of welding is in the subassembly production to need not incline at backplate/glass and additionally increase the encapsulation rete, can realize the sealed encapsulation of battery piece 02.

The shape of the first opening 1111 and the second opening 3111 may be any shape, and in order to improve the welding workability, the first opening 1111 and the second opening 3111 are preferably each independently any one of a circular opening, an oval opening, a racetrack-shaped opening, and a long-strip-shaped opening; it is preferable that the opening shapes of the first opening 1111 and the second opening 3111 are adapted to the pattern of the welding point position of the battery sheet 02 to be welded.

In some embodiments, the first opening 1111 and the second opening 3111 may be configured according to the shape of a specific welding position, and when the part to be welded on the battery piece 02 is a solid main grid, the first opening 1111 and the second opening 3111 are elongated openings or track-shaped openings; or when the object to be welded on the battery piece 02 is a bonding pad, the first opening 1111 and the second opening 3111 are circular openings or elliptical openings.

The specific arrangement of the openings in the composite solder ribbon of the present application may be various, and in some embodiments, as shown in fig. 3, in the same film group unit, the first opening portion 11 includes a first opening group unit 11-a, and the first opening group unit 11-a includes a plurality of first opening groups 111 arranged along the second direction; the second opening part 31 includes one second opening group unit 31-a, and the second opening group unit 31-a includes a plurality of second opening groups 311 arranged in the second direction. When the composite solder ribbon is assembled with the battery pieces 02, one battery piece 02 corresponds to one open hole group unit. Fig. 3 shows an exemplary structure of a membrane unit in which a first membrane layer 1 is on top, a second membrane layer 3 is on bottom, a solder ribbon 2 is between the first membrane layer 1 and the second membrane layer 3, a first opening 1111 arranged in a horizontal direction in a left small dashed frame is a first opening group 111, and a first opening group 111 arranged in a vertical direction in a large dashed frame forms a first opening group unit 11-a; the second openings 3111 arranged laterally in the right small dashed box are the second opening group 311, and the second opening group 311 arranged longitudinally in the large dashed box forms the second opening group unit 31-a.

In some embodiments, as shown in fig. 4, in the same membrane module unit, the first opening portion 11 includes a plurality of first opening group units 11-a arranged along the second direction, and each of the first opening group units 11-a includes a plurality of first opening groups 111 arranged along the second direction; the second opening part 31 includes a plurality of second opening group units 31-a arranged in the second direction, and each of the second opening group units 31-a includes a plurality of second opening groups 311 arranged in the first direction. When the composite solder ribbon is assembled with the battery pieces 02, one battery piece 02 corresponds to one open hole group unit. Fig. 4 shows an exemplary structure of a membrane unit in which a first membrane layer 1 is on top, a second membrane layer 3 is on bottom, a solder ribbon 2 is between the first membrane layer 1 and the second membrane layer 3, first openings 1111 arranged in a horizontal direction in a left small dashed frame are first opening groups 111, first opening groups 111 arranged in a vertical direction in a large dashed frame form a first opening group unit 11-a, and the first opening group units 11-a are arranged in a vertical direction; the second openings 3111 arranged laterally in the right small dashed frame are the second opening group 311, the second opening group 311 arranged longitudinally in the large dashed frame form the second opening group unit 31-a, and the first opening group unit 11-a is arranged longitudinally. Fig. 5 is a schematic perspective view of a film module unit of the composite solder tape shown in fig. 4, in which the solder tape is not shown.

Since the composite solder tape of the present application needs to be provided with the battery pieces 02 on both sides, i.e., in a zigzag structure when being laid in layers, in order to improve the stability of the laying, in some embodiments, the composite solder tape is a zigzag composite solder tape, the first opening portion 11 and the first non-opening portion 12 are spaced apart by the first spacer, and the first opening portion 11, the first spacer, and the first non-opening portion 12 form a zigzag shape; the second opening portion 31 and the second non-opening portion 32 are spaced by a second spacing portion, and the second opening portion 31, the second spacing portion, and the second non-opening portion 32 are formed in a zigzag shape. Wherein the corresponding position of the middle dotted line in fig. 2 is the first spacing portion or the second spacing portion and corresponds to the bending portion in fig. 5, 6, and 7.

In addition, the fact that the second opening group 311 is located on a straight line in one-to-one correspondence with the first opening group 111 in the first direction means that: since the solder ribbon is generally in a linear form, in order to expose the solder ribbon corresponding to the positions of the first opening 1111 and the second opening 3111, the positions of the second opening group 311 and the first opening group 111 are substantially on the same straight line, but even if the positions of the second opening group 311 and the first opening group 111 in the first direction are slightly deviated, the same falls within the protection scope of the present application and is not strictly limited.

In another exemplary embodiment of the present application, there is provided a method for manufacturing a composite solder strip, the method including: step S1, combining a first film layer 1, n welding strips 2 and a second film layer 3 to form a preparation film group, wherein the welding strips 2 are positioned between the first film layer 1 and the second film layer 3, and any one welding strip 2 is arranged corresponding to a first opening group 111 and a second opening group 311 which are positioned on the same straight line; and step S2, compounding the preparation film group to form a composite welding strip, wherein the position of the welding strip 2 corresponding to the first opening and/or the second opening is exposed. The compounding method comprises hot-press compounding, bonding compounding, live welding compounding and the like.

The composite welding strip is prepared by the preparation method through the mode of firstly assembling and then hot pressing, and the preparation method is simple and is easy to popularize and apply in industry.

To further improve the efficiency of the composite solder strip preparation, in some embodiments, the step S1 includes: respectively discharging a first film material unwinding device and a second film material unwinding device to obtain a first film layer 1 preparation part and a second film layer 3 preparation part; performing first interval hole forming on the first film layer 1 preparation piece, and forming a first hole group 111 each time hole forming is performed to obtain a first film layer 1; performing second spaced holes on the second membrane layer 3 preparation member, forming a second hole group 311 by drilling each time to obtain a second membrane layer 3, wherein the first spaced holes and the second spaced holes are alternately performed; and (3) paying off n welding strips 2 by using a welding strip 2 paying-off device, and rolling the n welding strips 2 between the first film layer 1 and the second film layer 3 through a press roller to form a preparation film group. The continuous assembly of the preparation film group is realized by using a winding structure in an unwinding mode.

After hot pressing, in order to meet the requirements of different photovoltaic modules, the preparation method preferably further comprises the processes of cutting and zigzag shaping the film group formed after hot pressing.

In another exemplary embodiment of the present application, there is provided a battery string, as shown in fig. 6 and 7, including a plurality of battery plates 02 and one or more composite welding strips 100 of any one of the above, opposite first and second surfaces of the battery plates 02 each having welding spots, the plurality of battery plates 02 being divided into p battery plate units, each of the battery plate units being composed of one battery plate 02 or s battery plates 02, p and s being positive integers, the composite welding strip 100 being composed of one film group unit, any one composite welding strip 100 corresponding to two adjacent battery plate units forming a basic string unit, one battery plate unit in the basic string unit corresponding to the first opening portion 11 of the composite welding strip 100, and the welding strip 2 of the composite welding strip 100 corresponding to the welding spot on the first surface of each battery plate 02 of the battery plate units through the first opening portion 1111 of the first opening portion 11, the other cell unit in the basic string unit corresponds to the second perforated portion 31 of the composite welding strip 100, and the welding strip 2 of the composite welding strip 100 corresponds to the welding point on the second surface of each cell 02 of the cell unit through the second opening 3111 of the second perforated portion 31.

The composite solder strip 100 structure in the battery string of the present application can verify whether laying of each solder strip 2 is accurately positioned via the first opening 1111 and the second opening 3111, and the solder strip 2 is accurately positioned in the composite solder strip 100. When compound solder strip 100 and battery piece 02 formed the battery cluster, only need with solder strip 2 correspond first trompil 1111 and second trompil 3111 solder strip 2 spill part with solar wafer 02 wait that the position of welding counterpoint weld can, because solder strip 2 is by the centre gripping bilayer membrane structure, solder strip 2 can not produce the skew after the alignment in the location, follow-up welding and hot pressing process all can be in the execution technology under the condition of strict alignment, the welding precision of subassembly production technology obtains obviously promoting, avoid appearing welding skew, the rosin joint, EL blackens the scheduling problem.

Fig. 7 is a schematic perspective view of a battery string, in which the number of battery cells 02 in the second direction of each battery cell unit may be 1, that is, the battery string shown in fig. 8, or s, that is, the battery string shown in fig. 11.

The number of basic string units in the battery string of the present application may be one or more. When the number of the basic string units is multiple, and in two adjacent basic string units, the composite welding strip of one basic string unit corresponds to one surface of one battery sheet unit, and the composite welding strip of the other basic string unit corresponds to the other surface of the same battery sheet unit.

Based on the different structure of the composite solder strip, the structure of the formed battery string is correspondingly different, and in an exemplary embodiment of the present application, each row of the battery string formed in fig. 8 includes a plurality of basic string units, and the battery sheet unit in each basic string unit is composed of 1 battery sheet 02. In a composite welding strip 100 corresponding to the composite welding strip of fig. 3, the first hole forming portion 11 includes a first hole forming group unit 11-a, in fig. 8, each first hole forming group unit 11-a is in one-to-one correspondence with the battery sheet 02, and each first hole forming group unit 11-a includes a plurality of first hole forming groups 111 arranged in the second direction; the second hole opening part 31 includes one second hole opening group unit 31-a, each second hole opening group unit 31-a corresponds to the battery plate 02 one by one, and each second hole opening group unit 31-a includes a plurality of second hole opening groups 311 arranged in the second direction. In fig. 8, the battery pieces 02 are arranged in the transverse direction, each battery piece 02 corresponding to the solid line corresponds to one first hole group unit 11-a in fig. 3, each battery piece 02 corresponding to the dotted line corresponds to one second hole group unit 31-a in fig. 3, the battery piece 02 corresponding to the solid line is located above the composite welding strip, and the battery piece 02 corresponding to the dotted line is located below the composite welding strip.

In another exemplary embodiment of the present application, the cell string formed in fig. 9 includes a basic string unit in which the cell sheet unit is composed of s cell sheets 02 arranged in the second direction. In the composite welding strip 100, corresponding to the composite welding strip of fig. 4, the first hole opening part 11 includes a plurality of first hole opening group units 11-a arranged along the second direction, in fig. 9, each first hole opening group unit 11-a corresponds to a battery plate 02 one by one, and each first hole opening group unit 11-a includes a plurality of first hole opening groups 111 arranged along the second direction; the second opening part 31 includes a plurality of second opening group units 31-a arranged in the second direction, each of the second opening group units 31-a corresponds to one of the battery cells 02, and each of the second opening group units 31-a includes a plurality of second opening groups 311 arranged in the first direction. In fig. 9, the battery pieces 02 are arranged longitudinally, each battery piece 02 corresponding to a solid line corresponds to one first hole group unit 11-a in fig. 4, each battery piece 02 corresponding to a dotted line corresponds to one second hole group unit 31-a in fig. 4, the battery piece 02 corresponding to the solid line is located above the composite welding strip, and the battery piece 02 corresponding to the dotted line is located below the composite welding strip. That is, the battery sheets 02 are arranged in the longitudinal direction, the battery sheets 02 arranged in the row direction are used as one battery sheet unit to form a basic string unit in the transverse direction by using the composite welding strip, and the basic string unit is further formed into a battery string in the transverse direction.

In order to make those skilled in the art better understand the cell string structure of the present application, in another exemplary embodiment of the present application, there is provided a cell string arrangement method, including: the solar cell array comprises a plurality of cell sheets 02 and one or more composite welding strips of any one of the above, wherein welding spots are arranged on the first surface and the second surface, opposite to each other, of each cell sheet 02, the cell sheets 02 are divided into p cell sheet units, each cell sheet unit consists of one cell sheet 02 or s cell sheets 02, p and s are integers, each composite welding strip consists of one membrane group unit, and the arrangement method comprises the following steps: the battery piece units are respectively arranged at the first hole opening part 11 and the second hole opening part 31 of the composite welding strip, any composite welding strip is enabled to correspond to two adjacent battery piece units to form a basic string unit, and the welding strip 2 of the composite welding strip is enabled to correspond to welding points on the first surfaces of the battery pieces 02 of the battery piece units through the first hole opening part 11 and to be correspondingly welded to welding points on the second surfaces of the battery pieces 02 of the battery piece units through the second hole opening part 31.

The arrangement mode corresponds to the structure of the composite welding strip, and the method is easy to implement.

When the number of the basic string units of the battery string needs to be further expanded, after the qth basic string unit is formed, the composite welding strip for forming the qth +1 th basic string unit is arranged corresponding to the exposed surface of the battery sheet unit in the qth basic string unit, and q is a positive integer.

The arrangement method of the cell units corresponding to fig. 8 includes: arranging the battery plates 02 in a first direction to form battery plate units, wherein each battery plate unit consists of 1 battery plate 02, and arranging the battery plate units in a one-to-one correspondence manner at the first hole opening part 11 and the second hole opening part 31 of the composite welding strip 100, wherein the first hole opening part 11 comprises a first hole opening group unit 11-A, the first hole opening group unit 11-A corresponds to one battery plate 02, and the first hole opening group unit 11-A comprises a plurality of first hole opening groups 111 arranged in a second direction; the second hole exposing part 31 includes one second hole exposing unit 31-a, the second hole exposing unit 31-a corresponding to one battery cell 02, and the second hole exposing unit 31-a includes a plurality of second hole exposing groups 311 arranged in the second direction. That is, a plurality of basic string units connected in series are arranged in each row along the first direction, and the structure of the complete battery string obtained by arranging the basic string units in a row-by-row manner according to the method is shown in fig. 10.

The arrangement method of the cell units corresponding to fig. 9 includes: arranging the battery plates 02 along a second direction to form battery plate units, wherein each battery plate unit consists of s battery plates 02 arranged along the second direction, and the battery plate units are arranged in a one-to-one correspondence manner at the first opening part 11 and the second opening part 31 of the composite welding strip 100, wherein the first opening part 11 comprises a plurality of first opening group units 11-A arranged along the second direction, each first opening group unit 11-A corresponds to one battery plate 02, and each first opening group unit 11-A comprises a plurality of first opening groups 111 arranged along the second direction; the second opening part 31 includes a plurality of second opening group units 31-a arranged in the second direction, each of the second opening group units 31-a corresponds to one of the battery cells 02, and each of the second opening group units 31-a includes a plurality of second opening groups 311 arranged in the first direction. The structure of the complete cell string obtained after arranging in a row and a column according to the method is shown in fig. 11.

In another exemplary embodiment of the present application, there is provided a photovoltaic module, which includes a front plate, a cell string of any one of the above, and a back plate, and further includes sealing films disposed at both ends of the cell string in the first direction, the sealing films covering surfaces of the cells, which are not covered by the composite solder tape, at both ends of the cell string. Fig. 10 and 11 show schematic structural diagrams of two types of battery strings.

In another exemplary embodiment of the present application, there is also provided a method for manufacturing a photovoltaic module, the method including: preparing a battery string by adopting any arrangement method; laying the battery string on the back plate; laying sealing films on the surfaces of the exposed battery pieces 02 at the head end and the tail end of the battery string; after the sealing film is laid, laying a front plate on the battery string to obtain a laminated structure; and laminating the laminated structure to obtain the photovoltaic module.

The utility model provides a battery piece's of the head and the tail both ends of battery end a surface does not cover by compound solder strip, consequently utilize the seal membrane will correspond not by compound solder strip cover the surface covering can, need not lay the encapsulation glued membrane in the front corresponding position at preceding board and back.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1 because the compound strip structure that welds that this application provided lays when welding the area, welds the area by first rete and first rete location centre gripping between the bilayer membrane, not only can verify whether accurate location in each welding area, can also rectify into the position through the trompil and do not have the deviation state. Meanwhile, the accurate positioning of the welding strip can be realized after hot pressing, so that the welding strip is not easy to generate position deviation with a film layer, and the welding strip and the film layer are also extremely difficult to generate deviation after being aligned with a battery piece, so that the subsequent procedures can be executed under the condition of strict alignment, the welding precision of the assembly production process is obviously improved, and the problems of welding deviation, insufficient welding, EL blackening and the like are avoided.

2 after the series welding is accomplished, the positive surface and the back surface of every piece battery are kept away from and are all covered by rete structure completely, also are covered by the rete completely between the adjacent battery piece, so not only can reduce the damage to the battery piece side, and the series welding structure of this application need not increase the encapsulation rete in addition at backplate/glass side in the subassembly production in addition, can realize the sealed encapsulation of battery piece.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A composite welding strip, characterized in that it comprises a first film layer (1), a second film layer (3) and a welding strip (2) sandwiched between the first film layer (1) and the second film layer (3), said composite welding strip being composed of one or more film group units, each of which,

the first film layer (1) has a first opening part (11) and a first non-opening part (12), the first opening part (11) has n spaced first opening groups (111), and each of the first opening groups (111) includes m arranged in a first direction ₁ A first plurality of openings (1111), the first plurality of openings (111) being arranged along a second direction, the first direction being perpendicular to the second direction, wherein m ₁ And n are positive integers;

the second film layer (3) has a second opening portion (31) and a second non-opening portion (32), the second opening portion (31) has n spaced second opening groups (311), and each of the second opening groups (311) includes m arranged in the first direction ₂ A plurality of second openings (3111), the second opening group (311) being arranged along the second direction, the second opening group (311) and the first opening group (111) being located on a straight line in a one-to-one correspondence along the first direction, wherein m is ₂ The number of the holes is a positive integer, a first hole part (11) and a second hole-free part (32) are correspondingly arranged, and a first hole-free part (12) and a second hole part (31) are correspondingly arranged;

each weld area (2) follow first direction extends, and arbitrary one weld area (2) and be located first trompil group (111) and second trompil group (311) on the same straight line and correspond the setting so that weld area (2) correspond first trompil (1111) and/or the position of second trompil (3111) is exposed.

2. The composite solder strip according to claim 1, characterized in that the first opening (1111) and the second opening (3111) each independently comprise any one of a circular opening, an oval opening, a racetrack-shaped opening, and a strip-shaped opening, and the opening shapes of the first opening (1111) and the second opening (3111) are adapted to the pattern of the solder joint positions of the battery plate (02) to be soldered.

3. The composite solder strip of claim 2, wherein when the portion to be soldered on the battery plate (02) is a solid main grid, the first opening (1111) and the second opening (3111) are elongated openings or track-shaped openings; or when the object to be welded on the battery piece (02) is a welding pad, the first opening (1111) and the second opening (3111) are circular openings or oval openings.

4. The composite solder strip according to any one of claims 1 to 3, wherein in the same film group unit, the first opening portion (11) includes one or more first opening group units (11-A) arranged in the second direction, and each of the first opening group units (11-A) includes a plurality of the first opening groups (111) arranged in the second direction; the second opening portion (31) includes one or more second opening group units (31-a) arranged in the second direction, and each of the second opening group units (31-a) includes a plurality of second opening groups (311) arranged in the first direction.

5. The composite solder strip of any one of claims 1 to 3, wherein the composite solder strip is a zigzag composite solder strip,

the first opening part (11) and the first non-opening part (12) are arranged at intervals by a first spacing part, and the first opening part (11), the first spacing part and the first non-opening part (12) form a zigzag shape;

the second opening portion (31) and the second non-opening portion (32) are spaced apart by a second spacing portion, and the second opening portion (31), the second spacing portion, and the second non-opening portion (32) form the zigzag shape.

6. A battery string, comprising:

a plurality of battery plates (02), wherein welding points are arranged on the first surface and the second surface of each battery plate (02) which are opposite to each other, the plurality of battery plates (02) are divided into p battery plate units, each battery plate unit is composed of one battery plate (02) or s battery plates (02), p and s are positive integers,

the composite solder strip (100) of any one or more of claims 1 to 5, the composite solder strip (100) being composed of one film group unit, any one of the composite solder strips (100) corresponding to two adjacent cell units forming a basic string unit, one of the cell units in the basic string unit corresponding to the first opening portion (11) of the composite solder strip (100), and the solder strip (2) of the composite solder strip (100) corresponding to a solder point on the first surface of each cell (02) of the cell unit through the first opening portion (1111) of the first opening portion (11), another of the cell units in the basic string unit corresponding to the second opening portion (31) of the composite solder strip (100), and the solder strip (2) of the composite solder strip (100) corresponding to a solder point on the second surface of each cell (02) of the cell unit through the second opening portion (3111) of the second opening portion (31).

7. The battery string according to claim 6, wherein the basic string unit is one or more, and when the basic string unit is multiple, and the composite welding strip (100) of one basic string unit corresponds to one surface of one battery sheet unit, the composite welding strip (100) of the other basic string unit corresponds to the other surface of the same battery sheet unit in two adjacent basic string units.

8. The battery string according to claim 6 or 7,

in the composite solder ribbon (100), the first hole forming portion (11) includes a first hole forming group unit (11-a), the first hole forming group unit (11-a) corresponds to the battery sheet (02), and the first hole forming group unit (11-a) includes a plurality of first hole forming groups (111) arranged in a second direction; the second hole-opening part (31) includes one second hole-group unit (31-A), the second hole-group unit (31-A) corresponding to the battery sheet (02), the second hole-group unit (31-A) including a plurality of second hole groups (311) arranged in a second direction.

9. The battery string according to claim 6 or 7,

in the composite solder strip (100), the first perforated portion (11) includes a plurality of first perforated group units (11-a) arranged along the second direction, each first perforated group unit (11-a) corresponds to the battery plate (02) one by one, and each first perforated group unit (11-a) includes a plurality of first perforated groups (111) arranged along the second direction; the second perforated portion (31) includes a plurality of second perforated group units (31-a) arranged along the second direction, each of the second perforated group units (31-a) corresponds to the battery sheet (02) one by one, and each of the second perforated group units (31-a) includes a plurality of second perforated group units (311) arranged along the first direction.

10. A photovoltaic module, comprising a front plate, the cell string of any one of claims 6 to 9, and a back plate, wherein the photovoltaic module further comprises sealing films disposed at the front and rear ends of the cell string in the first direction, and the sealing films cover the surfaces of the cells which are not covered by the composite solder strips at the front and rear ends of the cell string.

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