Positioning adhesive tape and photovoltaic module

Abstract

The utility model discloses a positioning adhesive tape and a photovoltaic module, the positioning adhesive tape is used for fixing two adjacent groups of battery pieces, the positioning adhesive tape comprises two oppositely arranged positioning parts and a protruding part connecting the two positioning parts, each positioning part comprises a base material layer and a bonding layer laminated on the front surface of the base material layer, and the protruding part is connected with the two positioning parts. The front face of the protruding part comprises a plurality of light reflecting faces distributed towards the battery piece, and the light reflecting faces are configured to reflect all or part of incident light to the surface of the battery piece. According to the utility model, the structure of the positioning adhesive tape is optimally designed, so that displacement of the battery pieces can be prevented through the protruding parts, and the distance between the adjacent battery pieces is kept unchanged in the laminating process; meanwhile, incident light can be at least partially reflected to the front face of the cell through the reflective face, reflected light is increased, and the power of the front face of the cell is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar photovoltaics, and in particular relates to a positioning tape and a photovoltaic component. Background Art

[0002] As an emerging energy source, solar energy has advantages over traditional fossil fuels in that it is inexhaustible, clean and environmentally friendly. Currently, one of the main ways to utilize solar energy is to convert the received light energy into electrical energy output through photovoltaic modules, which can be a large-area cell module formed by several cells connected in series, packaged and arranged in a square array. How to make photovoltaic modules work more efficiently and how to improve the reliability of photovoltaic modules are important issues facing the photovoltaic industry.

[0003] Photovoltaic modules are formed by stacking and hot pressing materials such as cover plate, first encapsulation film, battery cell, second encapsulation film, back plate, etc. Taking double-glass modules as an example, there are usually several solutions to increase the module power:

[0004] 1. White glazed glass is used as the back panel. The back of the module can generate electricity, and the front light can be reflected to increase the power, but it has the disadvantages of reduced load strength and high glass manufacturing cost;

[0005] 2. White encapsulation film is used for encapsulation, which has high load strength and low manufacturing cost. The reflection of the front light can increase the power, but the back of the component cannot generate electricity;

[0006] 3. Fully transparent glass is used, which has high load strength and low cost. The back side can generate electricity, but the light from the front side of the component is not reflected and there will be no power gain.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0008] The utility model aims to provide a positioning tape and a photovoltaic assembly, which can increase reflected light, improve the power of the front side of the battery cell, and prevent the displacement of the battery cell.

[0009] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0010] A positioning tape is used to fix two adjacent groups of battery cells. The positioning tape includes two positioning parts arranged opposite to each other and a protruding part connecting the two positioning parts. The positioning part includes a substrate layer and an adhesive layer stacked on the front side of the substrate layer. The front side of the protruding part includes a plurality of reflective surfaces distributed toward the battery cells. The reflective surfaces are configured to reflect all or part of the incident light to the surface of the battery cell.

[0011] In one or more embodiments of the present invention, the reflecting surface includes a first side adjacent to the battery cell and a second side away from the battery cell, the horizontal height of the first side of the reflecting surface is not lower than the horizontal height of the front side of the substrate layer, and the horizontal height of the second side of the reflecting surface is higher than the horizontal height of the first side of the reflecting surface.

[0012] In one or more embodiments of the present invention, the front side of the protrusion includes a first reflecting surface and a second reflecting surface that are symmetrically distributed, and the first side of the first reflecting surface and the first side of the second reflecting surface are directly connected to the front sides of the two substrate layers respectively.

[0013] In one or more embodiments of the present invention, the front side of the protrusion includes a first reflecting surface and a second reflecting surface that are symmetrically distributed, and the first side of the first reflecting surface and the first side of the second reflecting surface are respectively connected to the front sides of the two substrate layers through two first connecting surfaces, and the first connecting surfaces are distributed perpendicularly to the front sides of the substrate layers.

[0014] In one or more embodiments of the present invention, the front side of the protrusion includes a first reflecting surface and a second reflecting surface that are symmetrically distributed, and the second side of the first reflecting surface is directly connected to the second side of the second reflecting surface.

[0015] In one or more embodiments of the present invention, the front side of the protrusion includes a first reflective surface and a second reflective surface that are symmetrically distributed, and the second side of the first reflective surface is connected to the second side of the second reflective surface through a plurality of second connecting surfaces, and the second connecting surfaces are distributed parallel to the front side of the substrate layer.

[0016] In one or more embodiments of the present invention, the back side of the protrusion is flush with the back side of the substrate layer, and the thickness of the protrusion gradually increases from the first side to the second side of the reflective surface.

[0017] In one or more embodiments of the present invention, the back side of the protrusion is arranged corresponding to the front side of the protrusion, and the thickness of the protrusion remains at least partially unchanged from the first side to the second side of the reflective surface.

[0018] In one or more embodiments of the present invention, the reflective surface is a flat surface, a curved surface, or a combination of the two.

[0019] Another specific embodiment of the present invention provides a technical solution as follows:

[0020] A photovoltaic module, comprising a plurality of array-distributed battery cells and a plurality of positioning tapes, wherein the positioning tapes comprise a first positioning tape distributed along a first direction and a second positioning tape distributed perpendicular to the first direction, wherein the first positioning tape is used to fix two adjacent groups of battery cells in the first direction, and the second positioning tape is used to fix two adjacent groups of battery cells perpendicular to the first direction, and the first positioning tape or the second positioning tape is the aforementioned positioning tape.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model optimizes the structural design of the positioning tape, and can prevent the displacement of the battery cell through the protrusion, ensuring that the spacing between adjacent battery cells remains unchanged during the lamination process; at the same time, the incident light can be at least partially reflected to the front of the battery cell through the reflective surface, thereby increasing the reflected light and improving the power of the front of the battery cell;

[0023] The utility model can use fully transparent glass as the back plate, thereby increasing the load strength of the back plate and reducing the manufacturing cost of the photovoltaic module; at the same time, a transparent packaging film with higher reflection efficiency can be used to ensure that the back of the battery cell can emit light normally, thereby improving the bifaciality of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic cross-sectional view of the positioning tape in the first embodiment of the utility model;

[0026] Figure 2 This is a schematic cross-sectional view of the positioning tape in the second embodiment of the present utility model;

[0027] Figure 3 This is a schematic cross-sectional view of the positioning tape in the third embodiment of the present utility model;

[0028] Figure 4 This is a schematic cross-sectional view of the positioning tape in the fourth embodiment of the present utility model;

[0029] Figure 5 This is a schematic cross-sectional view of the positioning tape in Embodiment 5 of the present utility model;

[0030] Figure 6 This is a schematic cross-sectional view of the positioning tape in the sixth embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the main structure of the photovoltaic assembly in the seventh embodiment of the present utility model;

[0032] Figure 8 for Figure 7 A magnified view of the local structure at point A in the middle;

[0033] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure at AA in the middle;

[0034] Fig.10 for Figure 8 Schematic diagram of the cross-sectional structure at BB in the middle. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] It should be noted that the “first direction” in this application text is the Figure 7 The direction of the X-axis in the figure is marked with the second direction. Figure 7 The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] The technical solution of the present utility model will be described below in conjunction with the accompanying drawings.

[0040] Embodiment 1:

[0041] Reference Figure 1As shown, the positioning tape in this embodiment is used to fix two adjacent groups of battery cells. The positioning tape includes two positioning portions 1 arranged opposite to each other and a protruding portion 2 connecting the two positioning portions 1. The positioning portion 1 includes a substrate layer 11 and an adhesive layer 12 stacked on the front side 111 of the substrate layer. The front side 201 of the protruding portion includes a plurality of reflective surfaces distributed toward the battery cells. The reflective surfaces are configured to reflect all or part of the incident light to the surface of the battery cell.

[0042] By optimizing the structure of the positioning tape, part of the incident light can be reflected to the front of the cell through the reflective surface on the protrusion 2, thereby increasing the power of the front of the cell; at the same time, the displacement of the cell can be prevented by the protrusion 2. When using fully transparent glass as the back plate of the photovoltaic module and using a transparent packaging film, the defects of low load strength and high manufacturing cost of white glaze glass are avoided; at the same time, the defect of the back of the cell being unable to generate electricity when using a white packaging film is avoided, the double-sided rate of the photovoltaic module is improved, and the transparent packaging film has a high reflection efficiency, which is conducive to improving the power generation rate of the photovoltaic module.

[0043] The reflective surface in this embodiment includes a first side close to the cell and a second side away from the cell, the level of the first side of the reflective surface is not lower than the level of the front side 111 of the substrate layer, and the level of the second side of the reflective surface is higher than the level of the first side of the reflective surface. That is, the reflective surface is inclined or perpendicular to the front side 111 of the substrate layer.

[0044] Specifically, the front side 201 of the protrusion in this embodiment includes a first reflecting surface 21 and a second reflecting surface 22 which are symmetrically distributed. The first reflecting surface 21 and the second reflecting surface 22 are both inclined. The first side of the first reflecting surface 21 and the first side of the second reflecting surface 22 are directly connected to the front sides 111 of the two substrate layers respectively. The second side of the first reflecting surface 21 and the second side of the second reflecting surface 22 are directly connected and protrude from the plane where the front side 111 of the substrate layer is located.

[0045] The back side 202 of the protrusion in this embodiment is arranged corresponding to the front side 201 of the protrusion, and the thickness of the protrusion 2 remains unchanged from the first side to the second side of the reflective surface. According to this design, it is convenient to roll up and transport the positioning tape.

[0046] Specifically, the back side 202 of the protrusion in this embodiment includes a first back side 25 parallel to the first reflective surface 21 and a second back side 26 parallel to the second reflective surface 22, the first side of the first back side 25 and the first side of the second back side 26 are respectively connected to the back sides 112 of the two substrate layers, and the second side of the first back side 25 is connected to the second side of the second back side 26.

[0047] Exemplarily, the protrusion 2 in this embodiment is made of a reflective material, so the front side 201 of the protrusion is a reflective surface, and the front side 201 of the protrusion can reflect all or part of the incident light to the front side of the cell, thereby increasing the power of the front side of the cell. Preferably, since the protrusion 2 in this embodiment is made of a reflective material, the back side 202 of the protrusion is also a reflective surface, and the back side 202 of the protrusion can reflect all or part of the incident light to the back side of the cell, thereby increasing the power of the back side of the cell.

[0048] Of course, the present application is not limited thereto. In other embodiments, the protrusion 2 includes another substrate layer of the same material as the substrate layer 11 of the positioning portion 1, and the other substrate layer and the substrate layer 11 of the positioning portion 1 are both conventional tape substrates made of materials such as PET. The protrusion 2 also includes a first reflective layer stacked on the front of the other substrate layer, so that the front 201 of the protrusion has a reflective surface, so as to reflect all or part of the incident light to the front of the cell, thereby increasing the power of the front of the cell. Preferably, the protrusion 2 also includes a second reflective layer stacked on the back of the other substrate layer, so that the back 202 of the protrusion has a reflective surface, so as to reflect all or part of the incident light to the back of the cell, thereby increasing the power of the back of the cell.

[0049] Embodiment 2:

[0050] The positioning portion 1 of the positioning tape in this embodiment is completely the same as the positioning portion 1 of the positioning tape in the first embodiment, except that the structure of the protrusion 2 is different.

[0051] Specifically, refer to Figure 2 As shown, the front side 201 of the protrusion in this embodiment includes a first reflecting surface 21 and a second reflecting surface 22 which are symmetrically distributed. The first reflecting surface 21 and the second reflecting surface 22 are both inclined. The first side of the first reflecting surface 21 and the first side of the second reflecting surface 22 are respectively connected to the front sides 111 of the two substrate layers through two first connecting surfaces 23. The first connecting surfaces 23 are vertically distributed to the front sides 111 of the substrate layers. The second side of the first reflecting surface 21 and the second side of the second reflecting surface 22 are directly connected and protrude from the plane where the front side 111 of the substrate layer is located.

[0052] In this embodiment, the back side 202 of the protrusion is arranged corresponding to the front side 201 of the protrusion, and the thickness of the protrusion 2 remains at least partially unchanged from the first side to the second side of the reflective surface.

[0053] Specifically, the back side 202 of the protrusion in this embodiment includes a first back side 25 parallel to the first reflective surface 21, a second back side 26 parallel to the second reflective surface 22, and two side surfaces 27 parallel to the two first connecting surfaces 23, the first sides of the two side surfaces 27 are respectively connected to the back sides 112 of the two substrate layers, the second sides of the two side surfaces 27 are respectively connected to the first side of the first back side 25 and the first side of the second back side 26, and the second side of the first back side 25 is connected to the second side of the second back side 26.

[0054] Embodiment three:

[0055] The positioning portion 1 of the positioning tape in this embodiment is completely the same as the positioning portion 1 of the positioning tape in the first embodiment, except that the structure of the protrusion 2 is different.

[0056] Specifically, refer to Figure 3 As shown, the front side 201 of the protrusion in this embodiment includes a first reflecting surface 21 and a second reflecting surface 22 which are symmetrically distributed. The first reflecting surface 21 and the second reflecting surface 22 are both inclined. The first side of the first reflecting surface 21 and the first side of the second reflecting surface 22 are respectively connected to the front sides 111 of the two substrate layers through two first connecting surfaces 23, and the first connecting surfaces 23 are vertically distributed to the front sides 111 of the substrate layers; they are connected through the second connecting surface 24, and the second connecting surface 24 is parallelly distributed to the front sides 111 of the substrate layers.

[0057] In this embodiment, the back side 202 of the protrusion is arranged corresponding to the front side 201 of the protrusion, and the thickness of the protrusion 2 remains at least partially unchanged from the first side to the second side of the reflective surface.

[0058] Specifically, the back side 202 of the protrusion in this embodiment includes a first back side 25 parallel to the first reflecting surface 21, a second back side 26 parallel to the second reflecting surface 22, two side surfaces 27 parallel to the first connecting surface 23, and a third connecting surface 28 parallel to the second connecting surface 24, the two side surfaces 27, the first sides of the two side surfaces 27 are respectively connected to the back sides 112 of the two substrate layers, the second sides of the two side surfaces 27 are respectively connected to the first side of the first back side 25 and the first side of the second back side 26, the second side of the first back side 25 and the second side of the second back side 26 are respectively connected to the two sides of the third connecting surface 28.

[0059] Embodiment 4:

[0060] The positioning portion 1 of the positioning tape in this embodiment is completely the same as the positioning portion 1 of the positioning tape in the first embodiment, except that the structure of the protrusion 2 is different.

[0061] Specifically, refer to Figure 4As shown, the front side 201 of the protrusion in this embodiment includes a first reflecting surface 21 and a second reflecting surface 22 which are symmetrically distributed. The first reflecting surface 21 and the second reflecting surface 22 are both inclined. The first side of the first reflecting surface 21 and the first side of the second reflecting surface 22 are directly connected to the front sides 111 of the two substrate layers respectively. The second side of the first reflecting surface 21 and the second side of the second reflecting surface 22 are connected through a second connecting surface 24. The second connecting surface 24 is distributed parallel to the front side 111 of the substrate layer.

[0062] In this embodiment, the back side 202 of the protrusion is arranged corresponding to the front side 201 of the protrusion, and the thickness of the protrusion 2 remains at least partially unchanged from the first side to the second side of the reflective surface.

[0063] Specifically, the back side 202 of the protrusion in this embodiment includes a first back side 25 parallel to the first reflective surface 21, a second back side 26 parallel to the second reflective surface 22, and a third connecting surface 28 parallel to the second connecting surface 24, the first side of the first back side 25 and the first side of the second back side 26 are respectively connected to the back sides 112 of the two substrate layers, and the second side of the first back side 25 and the second side of the second back side 26 are respectively connected to the two sides of the third connecting surface 28.

[0064] Embodiment five:

[0065] The positioning portion 1 of the positioning tape in this embodiment is completely the same as the positioning portion 1 of the positioning tape in the first embodiment, except that the structure of the protrusion 2 is different.

[0066] Specifically, refer to Figure 5 As shown, the front side 201 of the protrusion in this embodiment includes a first light reflecting surface 21 and a second light reflecting surface 22 that are symmetrically distributed, and both the first light reflecting surface 21 and the second light reflecting surface 22 are curved surfaces.

[0067] In this embodiment, the back side 202 of the protrusion is arranged corresponding to the front side 201 of the protrusion, and the thickness of the protrusion 2 remains at least partially unchanged from the first side to the second side of the reflective surface.

[0068] Specifically, the back surface 202 of the protrusion in this embodiment includes a first back surface 25 parallel to the first light reflecting surface 21 and a second back surface 26 parallel to the second light reflecting surface 22. The first side of the first back surface 25 and the first side of the second back surface 26 are respectively connected to the back surfaces 112 of the two substrate layers, and the second side of the first back surface 25 is connected to the second side of the second back surface 26. Both the first back surface 25 and the second back surface 26 are curved surfaces.

[0069] Of course, the present application is not limited thereto, in other embodiments, one of the first reflecting surface 21 and the second reflecting surface 22 is a curved surface; or at least one of the first reflecting surface 21 and the second reflecting surface 22 is a combination of a flat surface and a curved surface.

[0070] Embodiment six:

[0071] The positioning portion 1 and the front side 201 of the protrusion of the positioning tape in this embodiment are exactly the same as the positioning portion 1 and the front side 201 of the protrusion of the positioning tape described in any one of Embodiments 1 to 5, except that the back side 202 of the protrusion is different.

[0072] For example, refer to Figure 6 As shown, the front side 201 of the protrusion in this embodiment is completely the same as the front side 201 of the protrusion in the first embodiment, and the back side 202 of the protrusion in this embodiment is flush with the back side 112 of the substrate layer, that is, the back side of the entire positioning tape is a plane. The thickness of the protrusion 2 gradually increases from the first side of the reflective surface to the second side.

[0073] Embodiment seven:

[0074] Reference Figure 7 , Figure 8 As shown, the photovoltaic module in this embodiment is explained by taking a double-glass module as an example, which includes a plurality of array-distributed battery cells 3 and a plurality of positioning tapes, the positioning tapes including a first positioning tape 4 distributed along a first direction and a second positioning tape 5 distributed perpendicular to the first direction (i.e., distributed along a second direction), the first positioning tape 4 is used to fix two adjacent groups of battery cells 3 in the first direction, and the second positioning tape 5 is used to fix two adjacent groups of battery cells 3 in the second direction.

[0075] The first positioning tape 4 or the second positioning tape 5 is the positioning tape shown in any one of the embodiments 1 to 6. By using the positioning tape, the photovoltaic module can maintain the spacing between two adjacent cells 3 unchanged before and after lamination, and at the same time increase the reflected light, thereby improving the front power of the cell 3.

[0076] In addition, the photovoltaic module in this embodiment can use fully transparent glass as the backboard, which increases the load strength of the backboard; and by using a transparent packaging film, the back of the battery cell 3 can generate electricity normally, thereby improving the bifaciality of the photovoltaic module.

[0077] For example, refer to Fig. 9 As shown, the first positioning tape 4 in this embodiment is the positioning tape shown in the first embodiment. The two substrate layers 11 of the positioning tape are bonded to the two adjacent groups of battery cells 3 in the first direction through the adhesive layer 12, and the protrusion 2 is at least partially located between the two adjacent groups of battery cells 3 in the first direction. The first positioning tape 4 is used to facilitate the reflection of incident light passing through the gap between the two adjacent groups of battery cells 3 in the first direction to the front of the battery cell 3, thereby increasing the power of the front of the battery cell 3.

[0078] Reference Fig.10As shown, the front side of the second positioning tape 5 in this embodiment is planar, and the two ends of the second positioning tape 5 are bonded to the two adjacent groups of battery cells 3 in the second direction, and the middle part of the second positioning tape 5 is located between the two adjacent groups of battery cells 3 in the second direction. Among them, since the two battery cells 3 along the second direction are electrically connected through the welding tape 6, in order to facilitate the bonding and positioning of the two battery cells 3 along the second direction through the second positioning tape 5, after the second positioning tape 5 is bonded, the plane where the second positioning tape 5 is located will correspond to the plane where the battery cell 3 and the welding tape 6 on the surface of the battery cell 3 are located. By using the second positioning tape 5, it is convenient to reflect the incident light passing through the gap between the two adjacent groups of battery cells 3 in the second direction to the front side of the battery cell 3, thereby further improving the power of the front side of the battery cell 3.

[0079] It can be seen from the above technical solutions that the utility model has the following beneficial effects:

[0080] The utility model optimizes the structural design of the positioning tape, and can prevent the displacement of the battery cell through the protrusion, ensuring that the spacing between adjacent battery cells remains unchanged during the lamination process; at the same time, the incident light can be at least partially reflected to the front of the battery cell through the reflective surface, thereby increasing the reflected light and improving the power of the front of the battery cell;

[0081] The utility model can use fully transparent glass as the back plate, thereby increasing the load strength of the back plate and reducing the manufacturing cost of the photovoltaic module; at the same time, a transparent packaging film with higher reflection efficiency can be used to ensure that the back of the battery cell can emit light normally, thereby improving the bifaciality of the photovoltaic module.

[0082] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A positioning tape for fixing two adjacent groups of battery cells, characterized in that: The positioning tape includes two positioning parts arranged opposite to each other and a protruding part connecting the two positioning parts, the positioning part includes a substrate layer and an adhesive layer stacked on the front side of the substrate layer, the front side of the protruding part includes a plurality of reflective surfaces distributed toward the battery cell, and the reflective surfaces are configured to reflect all or part of the incident light to the surface of the battery cell.

2. The positioning tape according to claim 1, characterized in that: The reflecting surface includes a first side adjacent to the battery cell and a second side away from the battery cell. The level of the first side of the reflecting surface is not lower than the level of the front side of the substrate layer, and the level of the second side of the reflecting surface is higher than the level of the first side of the reflecting surface.

3. The positioning tape according to claim 2, characterized in that: The front surface of the protrusion includes a first reflecting surface and a second reflecting surface that are symmetrically distributed, and a first side of the first reflecting surface and a first side of the second reflecting surface are directly connected to the front surfaces of the two substrate layers respectively.

4. The positioning tape according to claim 2, characterized in that: The front side of the protrusion includes a first reflecting surface and a second reflecting surface that are symmetrically distributed. The first side of the first reflecting surface and the first side of the second reflecting surface are respectively connected to the front sides of the two substrate layers through two first connecting surfaces, and the first connecting surfaces are perpendicular to the front sides of the substrate layers.

5. The positioning tape according to claim 2, characterized in that: The front side of the protrusion includes a first light reflecting surface and a second light reflecting surface that are symmetrically distributed, and the second side of the first light reflecting surface is directly connected to the second side of the second light reflecting surface.

6. The positioning tape according to claim 2, characterized in that: The front side of the protrusion includes a first reflecting surface and a second reflecting surface that are symmetrically distributed. The second side of the first reflecting surface is connected to the second side of the second reflecting surface through a plurality of second connecting surfaces. The second connecting surfaces are distributed parallel to the front side of the substrate layer.

7. The positioning tape according to claim 2, characterized in that: The back side of the protrusion is flush with the back side of the substrate layer, and the thickness of the protrusion increases gradually from the first side to the second side of the reflective surface.

8. The positioning tape according to claim 2, characterized in that: The back side of the protrusion is arranged corresponding to the front side of the protrusion, and the thickness of the protrusion remains at least partially unchanged from the first side to the second side of the reflective surface.

9. The positioning tape according to claim 1, characterized in that: The reflective surface is a flat surface, a curved surface, or a combination of the two.

10. A photovoltaic module, characterized in that: The photovoltaic module includes a plurality of array-distributed battery cells and a plurality of positioning tapes, the positioning tapes including a first positioning tape distributed along a first direction and a second positioning tape distributed perpendicular to the first direction, the first positioning tape is used to fix two adjacent groups of battery cells in the first direction, the second positioning tape is used to fix two adjacent groups of battery cells perpendicular to the first direction, the first positioning tape or the second positioning tape is the positioning tape described in any one of claims 1 to 9.

Images