CN211828793U - Photovoltaic module - Google Patents

Abstract

The utility model discloses a photovoltaic assembly, which comprises: a battery string layer; a backplane, the backplane is arranged below the battery string layer, and at least one junction box is arranged on the side of the backplane away from the battery string layer, The junction box shields at least one battery sheet of at least one battery string; the reflective layer is arranged between the battery string layer and the back plate, and the reflective layer includes two reflective horizontal strips and a plurality of reflective vertical strips, and the two reflective horizontal strips are in The photovoltaic modules are arranged at intervals in the string arrangement direction, each reflective longitudinal strip covers the edge of the adjacent cell strings, and at least one of the plurality of reflective longitudinal strips adjacent to the cell sheets shielded by the junction box is disconnected to form at least one opening , the openings are located at the battery slices shielded by the junction box, so that the shielding areas of all the battery slices in the battery string shielded by the junction box are equal. According to the photovoltaic module of the present invention, the shielding areas of the cells in the same cell string are equalized, current mismatch is avoided, and the reliability of the photovoltaic module is improved.

Description

Photovoltaic modules

technical field

The utility model relates to the field of photovoltaic technology, in particular to a photovoltaic assembly.

Background technique

With the rapid growth of market demand for photovoltaic modules, users are increasingly demanding photovoltaic modules. While ensuring high efficiency of photovoltaic modules, photovoltaic modules are also required to meet the requirements of various sites and different installation environments. Therefore, double-glass photovoltaic modules came into being. In the related art, since the junction box blocks the cells on the back of the double-glass photovoltaic module, the problem of current mismatch of the cells is prone to occur, resulting in low reliability of the photovoltaic module.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a photovoltaic module, which can avoid current mismatch and improve the reliability of the photovoltaic module.

A photovoltaic module according to an embodiment of the present invention includes: a battery string layer, the battery string layer includes a plurality of battery strings, each of the battery strings includes a plurality of battery sheets; a backplane, the backplane is provided on the Below the battery string layer, at least one junction box is provided on the side of the back plate away from the battery string layer, and the junction box shields at least one of the battery slices of at least one of the battery strings; the reflective layer, so The reflective layer is arranged between the battery string layer and the back plate, the reflective layer includes two reflective horizontal strips and a plurality of reflective vertical strips, and the two reflective horizontal strips are arranged in series on the photovoltaic modules. A plurality of the reflective vertical strips are arranged at intervals in the fabric direction, and are spaced apart from each other along the string-parallel direction perpendicular to the string arrangement direction, and each of the reflective vertical strips covers a phase. Adjacent to the edge of the battery string, at least one of the plurality of reflective longitudinal strips adjacent to the battery sheet shielded by the junction box is disconnected to form at least one opening, the opening is located in the junction box. At the shielded battery slices, the shielding areas of all the battery slices in the battery string shielded by the junction box are equal.

According to the photovoltaic module of the embodiment of the present invention, the cell string layer, the back plate and the light-reflecting layer including two light-reflecting horizontal strips and a plurality of light-reflecting vertical strips are arranged, and each light-reflecting vertical strip covers the edge of the adjacent cell strings And at least one of the plurality of reflective vertical strips adjacent to the battery slices shielded by the junction box is disconnected to form at least one opening, and the opening can avoid the shielding of the battery slices, so that all the batteries in the battery string shielded by the junction box are blocked. The shielding area of the chip is equal, which avoids the current mismatch of the battery, improves the reliability of the photovoltaic module, and can effectively avoid the reliability risk caused by the junction box shielding the backside of the battery.

According to some embodiments of the present invention, the junction box is opposite to one of the plurality of reflective vertical bars, the one of the plurality of reflective vertical bars is formed with the opening, and the opening It is a through wire hole, and the wire hole is directly opposite to the junction box.

According to some embodiments of the present invention, a plurality of the reflective vertical bars include a plurality of first reflective bars and a plurality of second reflective bars, and one of the first reflective bars is disposed between two adjacent second reflective bars. Reflective strips; there are a plurality of junction boxes, a plurality of the junction boxes are arranged in a one-to-one correspondence with a plurality of the first reflective strips, and each of the second reflective strips has the opening.

According to some embodiments of the present invention, each of the first reflective strips has the opening, and the length of the opening of the first reflective strip is smaller than the length of the opening of the second reflective strip.

According to some embodiments of the present invention, the length of the opening is l, wherein the l satisfies: 0mm<l≤500mm.

According to some embodiments of the present invention, the distance between two adjacent battery sheets in each battery string is d, where d satisfies: 0mm≤d≤2mm.

According to some embodiments of the present invention, the width of each of the reflective longitudinal strips is w, wherein the w satisfies: 2mm≤w≤15mm.

According to some embodiments of the present invention, the widths of the two lateral reflective strips and the two outermost longitudinal reflective strips in the parallel direction of the strings are greater than the widths of the remaining longitudinal reflective strips.

According to some embodiments of the present invention, the reflective layer is a reflective coating coated on a surface of one side of the back plate adjacent to the battery string layer.

According to some embodiments of the present invention, an encapsulation film is disposed between the back plate and the battery string layer, and the reflective layer is disposed on the encapsulation film.

According to some embodiments of the present invention, the reflective layer is bonded and connected to the back plate through an adhesive.

According to some embodiments of the present invention, the photovoltaic assembly is a symmetrical structure in the arrangement direction of the strings.

According to some embodiments of the present invention, the length of each of the reflective vertical strips is a, and the maximum distance between the two battery sheets with the farthest distance in the string arrangement direction is b, wherein, The a and b satisfy: 0.7≤a/b≤1.3.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a photovoltaic assembly according to an embodiment of the present invention;

2 is a schematic structural diagram of a light-reflecting layer of a photovoltaic module according to an embodiment of the present invention;

3 is a schematic diagram of a junction box of a photovoltaic module according to an embodiment of the present invention.

Reference number:

100: photovoltaic modules;

1: front transparent plate; 2: battery string layer; 21: battery string; 211: battery slice;

3: Backplane; 31: Junction box; 4: Reflective layer; 41: Reflective strips;

42: Reflective vertical strip; 421: Cable hole; 422: The first reflective strip;

423: Second reflective strip; 43: Opening; 5: Front encapsulation film; 6: Encapsulation film.

Detailed ways

The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary, and the embodiments of the present invention will be described in detail below.

The photovoltaic assembly 100 according to the embodiment of the present invention will be described below with reference to FIGS. 1-3 .

As shown in FIG. 1 , a photovoltaic module 100 according to an embodiment of the present invention includes a cell string layer 2 , a back plate 3 and a reflective layer 4 .

Specifically, the battery string layer 2 includes a plurality of battery strings 21 , and each battery string 21 includes a plurality of battery sheets 211 . In the description of the present invention, "plurality" means two or more. For example, in the examples of FIGS. 1 and 2 , the battery string layer 2 may include six battery strings 21 , and each battery string 21 may include a plurality of battery sheets 211 connected in series. Optionally, the photovoltaic assembly 100 may include a front transparent plate 1 , and the cell string layer 2 is disposed under the front transparent plate 1 .

Six battery strings 21 are shown in FIG. 1 for the purpose of illustration, but after reading the technical solution of the present application, it is obvious that the ordinary skilled person can understand that the solution is applied to the technical solution of other numbers of battery strings 21, This also falls within the protection scope of the present invention.

As shown in FIG. 2 and FIG. 3 , the back plate 3 is provided below the battery string layer 2 . At least one junction box 31 is provided on the side of the back plate 3 away from the battery string layer 2 . The junction box 31 shields at least one battery sheet 211 of at least one battery string 21 . In other words, the junction box 31 can shield at least one battery slice 211 in one battery string 21 , and can also shield at least one battery slice 211 in two adjacent battery strings 21 at the same time.

The reflective layer 4 is provided between the battery string layer 2 and the back plate 3 , and the reflective layer 4 includes two reflective horizontal bars 41 and a plurality of reflective vertical bars 42 , and the two reflective horizontal bars 41 are arranged in the string arrangement direction of the photovoltaic modules 100 . Arranged at intervals, a plurality of reflective vertical strips 42 are connected between two reflective horizontal strips 41 spaced apart from each other along the string parallel direction perpendicular to the string arrangement direction, and each reflective vertical strip 42 covers the edge of the adjacent battery strings 21 .

Here, it should be noted that the "string arrangement direction" can be understood as the arrangement direction of the plurality of battery sheets 211 in the battery string 21 (for example, the up and down direction in FIG. 2 ); Fabric Direction" is the vertical direction.

For example, in the example of FIG. 2 , the light-reflecting layer 4 may be formed in a rectangular shape. The reflective layer 4 includes two reflective horizontal strips 41 and seven reflective vertical strips 42 . Wherein, the seven reflective vertical strips 42 may be evenly spaced between the two reflective horizontal strips 41 along the series-parallel direction. Both ends of each reflective horizontal strip 41 are respectively connected to the reflective vertical strips 42 on both sides. The five reflective vertical strips 42 in the middle can cover the gap between two adjacent battery strings 21 and the edges of two adjacent battery strings 21 , and the two reflective vertical strips 42 on both sides are located at the edge of the battery string layer 2 , which can cover the edges of the battery strings 21 on both sides respectively.

At least one of the plurality of reflective longitudinal strips 42 adjacent to the battery sheet 211 shielded by the junction box 31 is disconnected to form at least one opening 43, and the opening 43 is located at the battery sheet 211 shielded by the junction box 31, so that the junction box 31 The shielding areas of all the battery sheets 211 in the shielded battery string 21 are equal.

For example, in the examples of FIGS. 2 and 3 , the junction box 31 may be provided in the middle of the backplane 3 . The junction box 31 blocks at least one battery sheet 211 in the at least one battery string 21 . Correspondingly, at least one of the reflective vertical bars 42 corresponding to the battery slices 211 shielded by the junction box 31 is disconnected to form the opening 43 , so that the shielding of the battery slices 211 by the junction box 31 can be balanced. Since the junction box 31 shields at least one battery slice 211 of at least one battery string 21, the shielding area of the battery slices 211 in some areas is too large, which consumes the power of other battery slices 211 that are not shielded in the battery string 21, thereby causing the The temperature of the shielding position increases, and hot spots appear. Therefore, at least one opening 43 is formed by disconnecting at least one of the plurality of reflective vertical strips 42 adjacent to the battery slice 211 shielded by the junction box 31 . The shading area of the cell 211 covered by the junction box 31 in the battery string 21 is equal to the shading area of other cells 211, which reduces the current mismatch of the cells 211, improves the reliability of the photovoltaic module 100, and can effectively avoid the junction box. 31 shields the reliability risk brought by the backside battery sheet 211 .

According to the photovoltaic module 100 of the embodiment of the present invention, the cell string layer 2 , the back plate 3 and the reflective layer 4 including two reflective horizontal bars 41 and a plurality of reflective vertical bars 42 are provided, and each reflective vertical bar 42 is covered The edges of adjacent battery strings 21 and at least one of the plurality of reflective vertical bars 42 adjacent to the battery slices 211 shielded by the junction box 31 are disconnected to form at least one opening 43, which can avoid shielding the battery slices 211 at the opening 43 , so that the shielding area of all the battery cells 211 in the battery string 21 blocked by the junction box 31 is equal, the current mismatch of the battery pieces 211 is avoided, the reliability of the photovoltaic module 100 is improved, and the junction box 31 can be effectively prevented from blocking the back battery. reliability risk posed by slice 211.

Optionally, referring to FIG. 2 in combination with FIG. 3 , the junction box 31 is opposite to one of the plurality of reflective vertical bars 42 , and the above-mentioned one of the plurality of reflective vertical bars 42 is formed with the above-mentioned opening 43 , and the above-mentioned opening 43 is Through the wire hole 421 , the wire hole 421 is directly opposite to the junction box 31 . Therefore, by arranging the above-mentioned wire hole 421 , the junction box 31 can conduct the current generated by the photovoltaic assembly 100 for the user while protecting the photovoltaic assembly 100 .

In some specific embodiments of the present invention, as shown in FIG. 2 and FIG. 3 , the plurality of reflective vertical bars 42 include a plurality of first reflective bars 422 and a plurality of second reflective bars 423, and two adjacent second reflective bars A first reflective strip 422 is disposed between the strips 423 . There are a plurality of junction boxes 31 , and the plurality of junction boxes 31 are arranged in a one-to-one correspondence with the plurality of first reflective strips 422 , and each of the second reflective strips 423 has an opening 43 .

For example, in the examples of FIGS. 2 and 3 , the photovoltaic module 100 adopts a three-part junction box 31 , that is, there are three junction boxes 31 . The reflective layer 4 includes two reflective horizontal bars 41 and seven reflective vertical bars 42 , and the seven reflective vertical bars 42 include three first reflective bars 422 and four second reflective bars 423 . Three first reflective strips 422 and four second reflective strips 423 are staggered. The three junction boxes 31 are opposite to the three first reflective strips 422 . The four second reflective strips 423 are all broken and form four openings 43 . Therefore, by making each second reflective strip 423 have an opening 43, it can be ensured that the shielding area of all the battery slices 211 in the battery string 21 shielded by the junction box 31 is equal, thereby effectively preventing the junction box 31 from shielding the back side of the battery slices 211. reliability risk.

Optionally, each of the first reflective strips 422 has an opening 43 (not shown in the figure), and the length of the opening 43 of the first reflective strip 422 is smaller than the length of the opening of the second reflective strip 423 . In this way, the openings 43 of the first reflective strips 422 can also avoid blocking the cells 211 , further ensuring that the blocking areas of all the cells 211 in the battery string 21 blocked by the junction box 31 are equal, and ensuring the reliability of the photovoltaic module 100 sex.

In some embodiments of the present invention, the length of the opening 43 is l, where l satisfies: 0mm<l≤500mm. Specifically, for example, when l>500 mm, the length of the opening 43 is too long, so that the length of the reflective vertical strip 42 except for the opening 43 is too short, which may reduce the power of the photovoltaic module 100 . Therefore, by making l satisfy: 0mm<l≤500mm, and the length of the opening 43 is reasonable, while ensuring that the shielding area of all the battery cells 211 in the battery string 21 shielded by the junction box 31 is equal, the photovoltaic module 100 can be guaranteed to have the same shielding area. higher power.

In some embodiments of the present invention, the distance between two adjacent battery sheets 211 in each battery string 21 is d, where d satisfies: 0mm≤d≤2mm. For example, when the distance d=0 mm, the distance between two adjacent battery slices 211 in the same battery string 21 is zero, that is to say, there is no distance between two adjacent battery slices 211 in each battery string 21 . Spacing connection; when d=2mm, the distance between two adjacent battery pieces 211 in the same battery string 21 is 2mm, and the plurality of battery pieces 211 in each battery string 21 are arranged at intervals; when 0mm<d< When the thickness is 2 mm, two adjacent battery sheets 211 in the same battery string 21 are connected with a small distance. Therefore, by making the distance d satisfy: 0mm≤d≤2mm, the gap between two adjacent battery slices 211 in each battery string 21 is small or no gap, the arrangement of the plurality of battery slices 211 is more compact, and it is convenient to For the electrical connection between the adjacent cells 211 , the size of the photovoltaic module 100 can be small, so that the efficiency of the photovoltaic module 100 can be improved, and the cost of the accessories of the photovoltaic module 100 can be reduced.

Optionally, the width of each reflective vertical strip 42 is w, where w satisfies: 2mm≤w≤15mm. For example, when the width w<2mm, the width of each reflective vertical strip 42 is too small, which may not cover the gap between two adjacent battery strings 21, reducing the power of the photovoltaic module 100; when w>15mm, each The width of each of the reflective vertical strips 42 is too large, which may result in an excessively large shielding area for the cell 211 . Therefore, by making w satisfy: 2mm≤w≤15mm, while ensuring the power of the photovoltaic module 100 , it is possible to effectively avoid an excessively large shielding area for the cell 211 .

In some embodiments of the present invention, referring to FIG. 2 , the widths of the two reflective horizontal strips 41 and the two outermost reflective vertical strips 42 in the series-parallel direction are greater than the widths of the remaining reflective vertical strips 42 . For example, since the two reflective horizontal strips 41 and the two outermost reflective vertical strips 42 in the string-parallel direction are located at the edge of the cell string layer 2 , there is an electrical gap at the edge of the cell string layer 2 to ensure the safety of the photovoltaic module 100 . Among them, the electrical clearance refers to the shortest space distance measured between two conductive parts or between the conductive parts and the protective interface of the equipment, that is, the shortest distance that can be insulated through air under the condition of ensuring stable and safe electrical performance . Therefore, the two light-reflecting horizontal strips 41 thus arranged and the two outermost light-reflecting vertical strips 42 in the series-parallel direction can cover the above-mentioned electrical gap to ensure the light utilization rate of the photovoltaic module 100 .

Optionally, the reflective layer 4 may be a reflective coating (not shown) coated on the surface of one side of the back plate 3 adjacent to the battery string layer 2 . In this way, the reflective layer 4 can increase the front power and the back power at the same time, thereby improving the bifacial ratio of the photovoltaic module 100 and facilitating the processing.

Or alternatively, as shown in FIG. 1 , an encapsulation adhesive film 6 is provided between the back plate 3 and the battery string layer 2 , and the reflective layer 4 is provided on the encapsulation adhesive film 6 . Specifically, the reflective layer 4 can be embedded in the encapsulation adhesive film 6 , and the surface of the reflective layer 4 is flush with the surface of one side of the encapsulation adhesive film 6 in the thickness direction. For example, a white polymer material can be compounded into a transparent polymer material using the shape of the light-reflecting layer 4 as a template. Wherein, the encapsulation film 6 may be one or more of ethylene-vinyl acetate, polyolefin materials and polyethylene foamed cotton. In this way, there is no difference in thickness between the reflective layer 4 and the encapsulation film 6 , which can effectively avoid the problem of lamination and splits of the photovoltaic module 100 , and can improve the yield of the photovoltaic module 100 .

Of course, the present invention is not limited to this, and the reflective layer 4 can also be bonded and connected to the back plate 3 through an adhesive. For example, when the back plate 3 is made of glass and the wire holes 421 are processed on the reflective vertical strips 42, the back plate 3 is easy to burst. At this time, the reflective layer 4 can be processed in advance, and then the reflective layer 4 can be adhered to the back plate 3 . In this way, the structural strength of the back sheet 3 can be prevented from being affected, so that the structural stability of the photovoltaic module 100 can be ensured.

Of course, the reflective layer 4 can also be printed on one side surface of the encapsulation film 6 . It should be understood by those skilled in the art that the preparation method of the reflective layer 4 is not limited here, as long as it is ensured that the reflective layer 4 is the reflective layer 4 provided on the encapsulation adhesive film 6 .

Optionally, the reflective layer 4 may be a titanium dioxide piece, a white glaze piece or a white polymer material piece. In this way, the back plate 3 or the encapsulation film 6 can have the white reflective layer 4 , thereby improving the light utilization rate, the power and the bifacial ratio of the photovoltaic module 100 , and the power gain on the back of the double-glass photovoltaic module 100 . . Of course, the material of the reflective layer 4 can also be other materials similar to white glaze, which is not limited here.

Optionally, the photovoltaic assembly 100 may be a symmetrical structure that is symmetrical in the string arrangement direction. For example, in the examples of FIG. 2 and FIG. 3 , the photovoltaic assembly 100 has a top-bottom symmetrical structure. Wherein, the photovoltaic assembly 100 may be symmetrical (as shown in FIG. 2 and FIG. 3 ), or may be asymmetrical, as long as the photovoltaic assembly 100 has a top-bottom symmetrical structure. Therefore, by making the photovoltaic module 100 a symmetrical structure, the structure is simple, the processing is convenient, and the appearance is beautiful.

In some optional embodiments of the present invention, the length of each reflective longitudinal strip 42 is a, and the maximum distance between the two battery sheets 211 farthest in the string arrangement direction is b, where a, b satisfies: 0.7≤a/b≤1.3. Specifically, for example, when a/b=0.7, the length of the reflective vertical bars 42 is smaller than the maximum distance between the two battery sheets 211 that are farthest away in the string arrangement direction, for example, the reflective vertical bars 42 may have openings 43; When a/b=1.3, the length of the reflective vertical strip 42 is greater than the maximum distance between the two battery sheets 211 with the farthest distance in the string arrangement direction, and at least one end of the reflective vertical strip 42 exceeds the The outermost edge of at least one of the two battery sheets farthest away in the string arrangement direction. This arrangement can ensure that the photovoltaic module 100 has a better light utilization rate.

The manufacturing process of the photovoltaic module 100 will be described below with reference to FIG. 1 .

As shown in FIG. 1 , the encapsulation film 6 is a backside encapsulation film. The photovoltaic module 100 includes, from top to bottom, a front transparent plate 1 , a front encapsulation film 5 , a battery string layer 2 , an encapsulation film 6 and a back plate 3 . When manufacturing the photovoltaic module 100 , firstly, the front transparent plate 1 , the front encapsulation film 5 , the battery string layer 2 , the encapsulation film 6 and the back plate 3 are placed in order to complete the pre-lamination preparation work of the double-glass photovoltaic module 100 . Then, the laminated five-layer structure including the front transparent plate 1, the front encapsulation film 5, the battery string layer 2, the encapsulation film 6 and the back plate 3 is vacuum heated and laminated, so that the front encapsulation film 5 and the back plate 3 are laminated. The encapsulation adhesive film 6 is cross-linked and cured to protect the battery string layer 2, and finally realize the five-layer structure (ie, the front transparent plate 1, the front encapsulation adhesive film 5, the battery string layer 2, the encapsulation adhesive film 6 and the back plate 3). After firmly bonding, the photovoltaic module 100 is completed by adding an aluminum alloy frame (not shown in the figure), a junction box 31 and sealing with silicone.

Other structures and operations of the photovoltaic assembly 100 according to the embodiments of the present invention are known to those of ordinary skill in the art, and will not be described in detail here.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by "" etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation is therefore not to be construed as a limitation of the present invention.

In the description of the present invention, "first feature" and "second feature" may include one or more of the features.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention. Variations, the scope of the present invention is defined by the claims and their equivalents.

Claims (13)

1. A photovoltaic module, characterized in that, comprising: a battery string layer, the battery string layer includes a plurality of battery strings, and each of the battery strings includes a plurality of battery slices; A backplane, the backplane is arranged below the battery string layer, and at least one junction box is provided on the side of the backplane away from the battery string layer, and the junction box shields at least one of the battery strings. at least one of the battery sheets; A reflective layer, the reflective layer is arranged between the battery string layer and the back plate, the reflective layer includes two reflective horizontal strips and a plurality of reflective vertical strips, and the two reflective horizontal strips are located in the photovoltaic The components are arranged at intervals in the string arrangement direction, and a plurality of the reflective vertical strips are connected between the two reflective horizontal bars spaced apart from each other along the string parallel direction perpendicular to the string arrangement direction, and each of the The reflective vertical strips cover the edges of the adjacent battery strings, and at least one of the plurality of reflective vertical strips adjacent to the battery sheets shielded by the junction box is disconnected to form at least one opening, the opening is located at At the battery slices shielded by the junction box, the shielding areas of all the battery slices in the battery string shielded by the junction box are equal. 2 . The photovoltaic module according to claim 1 , wherein the junction box is opposite to one of the plurality of reflective vertical bars, and the one of the plurality of reflective vertical bars is formed with The opening is a through wire hole, and the wire hole is directly opposite to the junction box. 3 . The photovoltaic module according to claim 1 , wherein the plurality of the reflective vertical strips comprise a plurality of first reflective strips and a plurality of second reflective strips, and between two adjacent second reflective strips. 4 . is provided with one of the first reflective strips; There are a plurality of the junction boxes, and the plurality of the junction boxes are arranged in a one-to-one correspondence with the plurality of the first reflective strips, and each of the second reflective strips has the opening. 4 . The photovoltaic assembly of claim 3 , wherein each of the first reflective strips has the opening, and the length of the opening of the first reflective strip is smaller than the length of the second reflective strip. 5 . the length of the opening. 5 . The photovoltaic module according to claim 1 , wherein the length of the opening is 1, wherein the 1 satisfies: 0mm<1≤500mm. 6 . 6 . The photovoltaic module according to claim 1 , wherein the distance between two adjacent cells in each cell string is d, wherein d satisfies: 0mm≤d≤2mm . 7 . The photovoltaic module according to claim 1 , wherein the width of each of the light-reflecting vertical strips is w, wherein the w satisfies: 2mm≦w≦15mm. 8 . 8. The photovoltaic module according to any one of claims 1-6, wherein the width of the two reflective horizontal strips and the two outermost reflective vertical strips in the parallel direction of the strings is greater than The width of the rest of the reflective vertical bars. 9 . The photovoltaic module according to claim 1 , wherein the reflective layer is a reflective coating coated on the surface of one side of the back sheet adjacent to the cell string layer. 10 . 10. The photovoltaic module according to any one of claims 1-6, wherein an encapsulation adhesive film is arranged between the back plate and the battery string layer, and the reflective layer is arranged on the encapsulation adhesive on the membrane. 11. The photovoltaic module according to any one of claims 1-6, wherein the light-reflecting layer is bonded and connected to the back plate by an adhesive. 12 . The photovoltaic assembly according to claim 1 , wherein the photovoltaic assembly is a symmetrical structure that is symmetrical in the string arrangement direction. 13 . 13. The photovoltaic module according to any one of claims 1-6, characterized in that, the length of each of the reflective longitudinal strips is a, and the two most distant ones in the string arrangement direction The maximum distance between the battery sheets is b, wherein the a and b satisfy: 0.7≤a/b≤1.3.

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