Photovoltaic module

Abstract

The utility model discloses a photovoltaic assembly, which comprises a plurality of battery pieces, and two adjacent battery pieces are arranged at intervals; the plurality of welding strips are connected between two adjacent battery pieces, each welding strip comprises a welding strip body and a black coating, the black coating is arranged on the outer surface of the welding strip body, and the black coating is at least located at a gap between two adjacent battery pieces. According to the photovoltaic assembly provided by the utility model, the manufacturing procedures of the photovoltaic assembly are reduced, the production efficiency of the photovoltaic assembly is improved, and the use stability of the photovoltaic assembly is also improved.

Description

Technical Field

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

[0002] Two adjacent cells in a photovoltaic module are usually connected by welding strips. When the photovoltaic module is completely black, the color of the welding strips is inconsistent with the color of the cells and the backplane. In the related art, a black spacer is usually provided between the cell and the welding strip, and the black spacer is located in the gap between two adjacent cells. During the production of photovoltaic modules, the process of placing black spacers is added during the series welding of cells, which reduces the production efficiency of photovoltaic modules and also reduces the reliability of photovoltaic modules. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a photovoltaic module, which reduces the production process of the photovoltaic module, improves the production efficiency of the photovoltaic module, and also improves the stability of the use of the photovoltaic module.

[0004] The photovoltaic module according to the embodiment of the utility model includes: a plurality of battery cells, wherein two adjacent battery cells are arranged at intervals; a plurality of welding strips, wherein the plurality of welding strips are connected between two adjacent battery cells, wherein the welding strips include a welding strip body and a black coating, wherein the black coating is arranged on the outer surface of the welding strip body, and wherein the black coating is located at least in the gap between two adjacent battery cells.

[0005] According to the photovoltaic module of the utility model, by providing a black coating on the welding strip body, the full black effect of the photovoltaic module is effectively ensured, the use performance of the photovoltaic module is improved, and the use effect of the photovoltaic module is also improved. In addition, the manufacturing process of the photovoltaic module is reduced, thereby improving the production efficiency of the photovoltaic module and reducing the production cost of the photovoltaic module. Moreover, the use stability of the photovoltaic module is improved. In addition, the structure of the welding strip is simple and easy to produce, thereby improving the production efficiency of the welding strip.

[0006] According to some embodiments of the present invention, the black coating is a black organic material layer or a black metal layer.

[0007] According to some embodiments of the utility model, two adjacent battery cells are arranged at intervals along a first direction, a plurality of welding strips are connected between the back sides of two adjacent battery cells, and the black coating is at least provided on the surface of the welding strip body corresponding to the side where the front side of the battery cell is located.

[0008] According to some embodiments of the present invention, the entire outer circumference of the welding strip body is provided with the black coating.

[0009] According to some embodiments of the present invention, the cross-sectional shape of the welding strip is circular or rectangular.

[0010] According to some embodiments of the utility model, when the cross-sectional shape of the welding strip along the thickness direction of the battery cell is circular, the diameter of the welding strip is d, wherein d satisfies: 0.1mm≤d≤0.35mm; or, when the cross-sectional shape of the welding strip along the thickness direction of the battery cell is rectangular, the length of the cross-sectional area of ​​the welding strip is a, and the width of the cross-sectional area of ​​the welding strip is b, wherein a and b respectively satisfy: 0.4mm≤a≤0.8mm, 0.1mm≤b≤0.4mm.

[0011] According to some embodiments of the present invention, the gap between two adjacent battery cells is w, wherein w satisfies: 0.3 mm ≤ w ≤ 1.0 mm.

[0012] According to some embodiments of the present invention, the battery cell is a battery cell with a main grid or a battery cell without a main grid.

[0013] According to some embodiments of the utility model, the photovoltaic module further includes: a backplane, which is located on the back side of the battery cell, and the surface of the backplane on one side facing the welding strip is a black surface at least at a position relative to the gap between two adjacent battery cells and at a position relative to the bus bar area.

[0014] According to some embodiments of the present invention, the photovoltaic component is a fully black photovoltaic component.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic diagram of a photovoltaic assembly according to an embodiment of the utility model;

[0018] Figure 2 is a schematic diagram of a photovoltaic assembly according to another angle of the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the back side of a photovoltaic module according to an embodiment of the utility model, wherein the cell is a main grid cell;

[0020] Figure 4It is a schematic diagram of the back side of a photovoltaic module according to an embodiment of the utility model, wherein the cell is a main grid-less cell.

[0021] Reference numerals:

[0022] 100. Photovoltaic modules;

[0023] 1. Cell; 11. Main grid line; 12. Secondary grid line;

[0024] 2. Solder strip; 21. Black coating. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 4 A photovoltaic assembly 100 according to an embodiment of the present invention is described.

[0026] Reference Figure 1 and Figure 2 According to the photovoltaic module 100 of the embodiment of the utility model, it includes a plurality of solar cells 1 and a plurality of welding strips 2. In the description of the utility model, "plurality" means two or more.

[0027] Specifically, two adjacent battery cells 1 are arranged at intervals, and a plurality of welding strips 2 are connected between the two adjacent battery cells 1. The welding strips 2 include a welding strip body (not shown) and a black coating 21. The black coating 21 is arranged on the outer surface of the welding strip body, and the black coating 21 is at least located in the gap between the two adjacent battery cells 1. For example, Figure 1 and Figure 2 In the example, each soldering ribbon 2 is connected between two adjacent battery cells 1 , and the black coating 21 is at least located at the gap between two adjacent battery cells 1 on the side of the soldering ribbon body facing the battery cell 1 .

[0028] In this way, by setting the black coating 21, the welding strip 2 located at the gap between the two battery cells 1 is black, so that the photovoltaic module 100 can be completely black, which is beneficial to the use of the photovoltaic module 100. In addition, compared with the setting of black isolation members in the traditional technology, the use of black isolation members to block the welding strip 2 between adjacent battery cells 1 to achieve the full black effect of the photovoltaic module 100 is avoided, thereby reducing the manufacturing process of the photovoltaic module 100, thereby improving the production efficiency of the photovoltaic module 100, and also reducing the production cost of the photovoltaic module 100. Moreover, the reliability risk brought to the photovoltaic module by installing black isolation members in the traditional technology is reduced, thereby improving the use stability of the photovoltaic module 100. In addition, the structure of the welding strip 2 is simple and easy to produce, thereby improving the production efficiency of the welding strip 2, and then improving the production efficiency of the photovoltaic module 100.

[0029] According to the photovoltaic module 100 of the utility model, by providing the black coating 21 on the welding strip body, the full black effect of the photovoltaic module 100 is effectively ensured, the use performance of the photovoltaic module 100 is improved, and the use effect of the photovoltaic module 100 is also improved. In addition, the manufacturing process of the photovoltaic module 100 is reduced, thereby improving the production efficiency of the photovoltaic module 100 and reducing the production cost of the photovoltaic module 100. Moreover, the use stability of the photovoltaic module 100 is improved. In addition, the structure of the welding strip 2 is simple and easy to produce, thereby improving the production efficiency of the welding strip 2.

[0030] According to some embodiments of the present invention, the black coating 21 is a black organic material layer or a black metal layer. For example, when the black coating 21 is a black organic material layer or a black metal layer, the black coating 21 can be connected to the cell 1 by welding, so as to facilitate the connection between the welding strip 2 and the cell 1. Moreover, the black coating 21 can be conductive, thereby effectively ensuring that adjacent cells 1 can be electrically connected through the welding strip 2, thereby facilitating the normal use of the photovoltaic module 100 for a long time.

[0031] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , two adjacent battery cells 1 are along the first direction (such as Figure 2 The plurality of solder strips 2 are arranged at intervals between the backs of two adjacent cells 1, and the black coating 21 is provided at least on the surface of the solder strip body corresponding to the side where the front of the cell 1 (i.e., the front side of the cell 1) is located. For example, Figure 2 and Figure 3 In the example, multiple cells 1 are arranged at intervals along the left-right direction, five welding strips 2 are connected between two adjacent cells 1, and the five welding strips 2 are arranged at intervals along the up-down direction, and the black coating 21 covers the side of the welding strip body facing the cell 1, that is, the black coating 21 is located on the front side of the welding strip body. In this way, the gaps between adjacent cells 1 are black, which effectively ensures the full black effect of the front side of the photovoltaic module 100, thereby facilitating the normal use of the photovoltaic module 100 and improving the performance. In addition, the setting position of the black coating 21 is reasonable, which is convenient for production, thereby helping to improve the production efficiency of the welding strip 2.

[0032] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The entire outer peripheral surface of the welding strip body is provided with a black coating 21. Figure 2 and Figure 3In the example, the soldering ribbon 2 is entirely black. Thus, the soldering ribbon 2 is entirely black, which improves the accuracy of the connection between the soldering ribbon 2 and the cell 1, and each angle of the outer peripheral surface of the soldering ribbon 2 can be connected to the cell 1. In addition, it is also convenient to set the black coating 21, thereby facilitating the production of the soldering ribbon 2, which helps to improve the production efficiency of the photovoltaic module 100.

[0033] According to some embodiments of the present invention, referring to Figure 2 , the cross-sectional shape of the welding strip 2 is circular or rectangular. For example, when the cross-sectional shape of the welding strip 2 is circular, the welding strip 2 is cylindrical as a whole, the outer peripheral surface of the welding strip 2 is an arc surface, and the outer peripheral surface of the welding strip 2 is connected to the back side of the battery cell 1, which is conducive to the connection between the welding strip 2 and the battery cell 1. In addition, when the cross-sectional shape of the welding strip 2 is rectangular, the front side surface of the welding strip 2 is a plane, so that the front side surface of the welding strip 2 and the rear side surface of the battery cell 1 are closely fitted, which helps to improve the welding effect of the welding strip 2 and the battery cell 1. Moreover, the contact area between the welding strip 2 and the battery cell 1 is also increased, which is conducive to improving the connection stability of the welding strip 2 and the battery cell 1, thereby improving the use stability of the photovoltaic module 100.

[0034] According to some embodiments of the present invention, when the soldering tape 2 is disposed along the thickness direction of the battery cell 1 (eg Figure 2 When the cross-sectional shape of the welding ribbon 2 (in the front-to-back direction shown in FIG. 1 ) is circular, the diameter of the welding ribbon 2 is d, wherein d satisfies: 0.1 mm ≤ d ≤ 0.35 mm. For example, when the diameter d of the welding ribbon 2 is less than 0.1 mm, the diameter of the welding ribbon 2 is small, thereby reducing the contact area between the welding ribbon 2 and the battery cell 1, thereby increasing the difficulty of welding the welding ribbon 2 and the battery cell 1, and also reducing the connection stability between the welding ribbon 2 and the battery cell 1. When the diameter d of the welding ribbon 2 is greater than 0.35 mm, the diameter of the welding ribbon 2 is large, which increases the material consumption of the welding ribbon body and the black coating 21, thereby increasing the production cost of the welding ribbon 2, and thereby increasing the production cost of the photovoltaic module 100. Therefore, by setting the diameter d of the welding ribbon 2 to satisfy 0.1 mm ≤ d ≤ 0.35 mm, the diameter size of the welding ribbon 2 is reasonably set, the contact area between the welding ribbon 2 and the battery cell 1 is increased, thereby reducing the difficulty of welding the welding ribbon 2 and the battery cell 1, which is conducive to improving the production efficiency of the photovoltaic module 100, and also improving the connection stability of the welding ribbon 2 and the battery cell 1, and improving the use stability of the photovoltaic module 100. In addition, the material usage of the soldering ribbon body and the black coating 21 is reduced, thereby reducing the production cost of the soldering ribbon 2 and further reducing the production cost of the photovoltaic module 100 .

[0035] According to other embodiments of the utility model, when the cross-sectional shape of the welding strip 2 along the thickness direction of the battery cell 1 (i.e., the front-to-back direction) is a rectangle, the length of the cross-sectional shape of the welding strip 2 is a, and the width of the cross-sectional shape of the welding strip 2 is b, wherein a and b respectively satisfy: 0.4mm≤a≤0.8mm, 0.1mm≤b≤0.4mm. For example, when the length of the welding strip 2 along the up-down direction is a, and the length of the welding strip 2 along the front-to-back direction is b. When the length a of the cross-sectional shape of the welding strip 2 is less than 0.4mm, the area of ​​the side surface of the welding strip 2 facing the battery cell 1 is small, thereby reducing the contact area between the welding strip 2 and the battery cell 1, increasing the welding difficulty of the welding strip 2 and the battery cell 1, reducing the production efficiency of the photovoltaic module 100, and also reducing the connection stability of the welding strip 2 and the battery cell 1, and reducing the use stability of the photovoltaic module 100. When the length a of the cross-sectional shape of the welding strip 2 is greater than 0.8mm, the material consumption of the welding strip 2 is increased, thereby increasing the production cost of the welding strip 2 and the production cost of the photovoltaic module 100. When the width b of the cross section of the welding ribbon 2 is less than 0.1 mm, the thickness of the welding ribbon 2 along the front-to-back direction is small, and the welding ribbon 2 is thin, thereby reducing the structural strength of the welding ribbon 2, and the welding ribbon 2 is prone to breakage during use, thereby reducing the stability of the electrical connection between two adjacent battery cells 1 through the welding ribbon 2, and reducing the use stability of the photovoltaic module 100. When the width b of the cross section of the welding ribbon 2 is greater than 0.4 mm, the thickness of the welding ribbon 2 along the front-to-back direction is large, thereby increasing the material consumption of the welding ribbon 2, increasing the production cost of the welding ribbon 2, and thereby increasing the production cost of the photovoltaic module 100.

[0036] Thus, when the cross-sectional shape of the welding strip 2 along the thickness direction of the battery cell 1 is rectangular, by setting the length a on the cross-sectional shape of the welding strip 2 and the width b on the cross-sectional shape of the welding strip 2 to satisfy 0.4mm≤a≤0.8mm and 0.1mm≤b≤0.4mm respectively, the size of the cross-sectional shape of the welding strip 2 is reasonably set, thereby increasing the area of ​​the side surface of the welding strip 2 facing the battery cell 1, thereby increasing the contact area between the welding strip 2 and the battery cell 1, thereby reducing the welding difficulty of the welding strip 2 and the battery cell 1, which is conducive to improving the production efficiency of the photovoltaic module 100, and also improving the connection stability of the welding strip 2 and the battery cell 1, which is conducive to improving the use stability of the photovoltaic module 100. In addition, the material consumption of the welding strip 2 is reduced, thereby reducing the production cost of the welding strip 2, thereby reducing the production cost of the photovoltaic module 100. In addition, the thickness of the welding strip 2 along the front-to-back direction is increased, thereby improving the structural strength of the welding strip 2, avoiding the welding strip 2 from breaking during use, thereby improving the stability of the electrical connection of two adjacent battery cells 1 through the welding strip 2, and improving the use stability of the photovoltaic module 100. But it is not limited to this. It should be noted that when the cross-sectional shape of the soldering ribbon 2 along the thickness direction of the battery cell 1 is rectangular, the length of the soldering ribbon 2 along the front-to-back direction may be a, and the length of the soldering ribbon 2 along the top-to-bottom direction may be b.

[0037] According to some embodiments of the present invention, referring to Figure 3 , the gap between two adjacent cells 1 is w, where w satisfies: 0.3mm≤w≤1.0mm. For example, when the gap w between two adjacent cells 1 is less than 0.3mm, the gap between two adjacent cells 1 is small, so that when the photovoltaic module 100 is used, the adjacent cells 1 are prone to mutual influence, which is not conducive to the long-term normal use of the photovoltaic module 100. When the gap w between two adjacent cells 1 is greater than 1.0mm, the gap between two adjacent cells 1 is large, thereby reducing the number of cells 1 arranged in the photovoltaic module 100, thereby reducing the space utilization rate of the photovoltaic module 100, and also reducing the photoelectric conversion capacity of the photovoltaic module 100. Therefore, by setting the gap w between two adjacent cells 1 to satisfy 0.3mm≤w≤1.0mm, the size between two adjacent cells 1 is reasonably set, thereby avoiding mutual influence between two adjacent cells 1 when the photovoltaic module 100 is used, thereby facilitating the long-term normal use of the photovoltaic module 100. In addition, the number of cells 1 arranged in the photovoltaic module 100 is increased, thereby improving the space utilization of the photovoltaic module 100 and also improving the photoelectric conversion capacity of the photovoltaic module 100 .

[0038] According to some embodiments of the present invention, referring to Figure 3 and Figure 4 , the cell 1 is a cell with a main grid 1 or a cell without a main grid 1. For example, Figure 3 As shown, the cell 1 can be configured as a main grid cell 1, the main grid line 11 and the auxiliary grid line 12 are both arranged on the back of the cell 1, and the extension direction of the welding strip 2 is parallel to the extension direction of the main grid line 11. The setting of the main grid can reduce the resistance loss, thereby improving the efficiency of the cell 1, and further helping to improve the photoelectric conversion capacity of the photovoltaic module 100. Figure 4 As shown, the battery cell 1 can be set as a main grid-free battery cell 1, the auxiliary grid line 12 is set on the back of the battery cell 1, the welding strip 2 is connected to the auxiliary grid line 12, and the extension direction of the welding strip 2 is perpendicular to the extension direction of the auxiliary grid line 12. By reducing shading and resistance losses, the power of the photovoltaic module 100 is increased and the production cost of the photovoltaic module 100 is reduced.

[0039] According to some embodiments of the utility model, the photovoltaic module 100 further includes a backplane (not shown in the figure), the backplane is located on the back side of the battery cell 1, and the side surface of the backplane facing the welding strip 2 is a black surface at least at the relative position of the gap between two adjacent battery cells and at the relative position of the bus bar (not shown in the figure). For example, the backplane is located on the rear side of the battery cell 1, and the welding strip 2 is located between the backplane and the battery cell 1. The setting of the backplane includes the following situations: First, the outer surface of the backplane is completely black. Second, the front side of the backplane (that is, the side surface of the backplane facing the welding strip 2) is a completely black surface. Third, the front side of the backplane is black at the relative position of the gap between two adjacent battery cells 1 and at the relative position of the bus bar area, and the color of other areas is not limited. Fourth, the front side of the backplane is black at the relative position of the upper and lower sides of each welding strip 2 between two adjacent battery cells 1 and at the relative position of the bus bar area. Thus, it is effectively ensured that the front side of the back plate and the front side of the welding strip 2 are the same color at the gap between two adjacent battery cells 1 and at the position relative to the busbar area, thereby effectively ensuring that the front side of the photovoltaic module 100 is completely black, thereby further improving the performance of the photovoltaic module 100. In addition, regarding the setting of the above-mentioned "black surface", a black coating can be provided on the surface of the side of the back plate facing the welding strip 2. Alternatively, a black film strip can be pasted at the relative position between the front side of the back plate and the gap between two adjacent battery cells 1 and at the relative position to the busbar area, which is simple to operate and easy to manufacture.

[0040] Further optionally, the width of the black surface (or black film strip) on the backplane corresponding to the gap between two adjacent battery cells 1 is L1, and L1 is greater than the width of the gap between the corresponding two adjacent battery cells 1. Multiple battery cells 1 can be connected in series to form a battery string (not shown in the figure), and the width of the black surface on the backplane corresponding to the gap between the two adjacent battery strings is L2, and L2 is greater than the width of the gap between the two adjacent battery strings. The width of the black surface (or black film strip) on the backplane corresponding to the bus bar area is L3, and L3 is greater than the width of the corresponding bus bar. Thus, while ensuring that the surface of the photovoltaic module 100 is a completely black surface, it is also beneficial to the assembly of the backplane and improves the assembly efficiency. For example, L1, L2 and L3 respectively meet: L1≥1mm, L2≥2mm and L3≥10mm. Thus, it is effectively ensured that the front side of the backplane is black at the gap between two adjacent battery cells 1 and at the relative position to the bus bar area, thereby effectively ensuring that the photovoltaic module 100 is completely black, thereby further improving the performance of the photovoltaic module 100.

[0041] According to some embodiments of the present invention, the photovoltaic module 100 is a full black photovoltaic module. Thus, the photovoltaic module 100 is effectively guaranteed to be of the same color as a whole, which is beneficial to the long-term use of the photovoltaic module 100. In addition, the full black photovoltaic module meets the market demand for appearance and anti-glare, as well as the demand for roofs, which helps to further improve the performance of the photovoltaic module 100.

[0042] The process of connecting multiple battery cells 1 in the photovoltaic module 100 is roughly as follows: first, place the multiple battery cells 1 in sequence and at intervals, then lay welding tapes 2 on the back of two adjacent battery cells 1 along the left-right direction, and lay multiple welding tapes 2 on two adjacent battery cells 2, and the multiple welding tapes 2 are arranged at intervals from bottom to bottom, and then the battery cells 1 and the welding tapes 2 are welded by welding, and finally the strings are made. The strings after welding are made according to the normal lamination preparation process of the photovoltaic module 100.

[0043] Other structures and operations of the photovoltaic assembly 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0044] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0046] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that: include: A plurality of battery cells, wherein two adjacent battery cells are arranged at intervals; A plurality of welding strips are connected between two adjacent battery cells, the welding strips include a welding strip body and a black coating, the black coating is arranged on the outer surface of the welding strip body, and the black coating is at least located in the gap between two adjacent battery cells.

2. The photovoltaic module according to claim 1, characterized in that: The black coating is a black organic material layer or a black metal layer.

3. The photovoltaic module according to claim 1, characterized in that: Two adjacent battery cells are arranged at intervals along a first direction, a plurality of welding strips are connected between the back sides of two adjacent battery cells, and the black coating is at least provided on the surface of the welding strip body corresponding to the side where the front side of the battery cell is located.

4. The photovoltaic module according to claim 1, characterized in that: The entire outer circumference of the welding strip body is provided with the black coating.

5. The photovoltaic module according to claim 1, characterized in that: The cross-sectional shape of the welding strip is circular or rectangular.

6. The photovoltaic module according to claim 5, characterized in that: When the cross-sectional shape of the welding ribbon along the thickness direction of the battery cell is circular, The diameter of the welding strip is d, wherein d satisfies: 0.1 mm ≤ d ≤ 0.35 mm; or When the cross-sectional shape of the welding ribbon along the thickness direction of the battery cell is rectangular, The length of the cross section of the welding strip is a, and the width of the cross section of the welding strip is b, wherein a and b respectively satisfy: 0.4mm≤a≤0.8mm, 0.1mm≤b≤0.4mm.

7. The photovoltaic module according to claim 1, characterized in that: The gap between two adjacent battery cells is w, wherein w satisfies: 0.3mm≤w≤1.0mm.

8. The photovoltaic module according to claim 1, characterized in that: The battery cell is a battery cell with a main grid or a battery cell without a main grid.

9. The photovoltaic module according to claim 1, characterized in that: Further including: A backplane, the backplane is located on the back side of the battery cell, and the surface of the backplane on one side facing the welding strip is a black surface at least at a position relative to the gap between two adjacent battery cells and at a position relative to the bus bar area.

10. The photovoltaic module according to any one of claims 1 to 9, characterized in that: The photovoltaic module is a full black photovoltaic module.

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