Photovoltaic module

Abstract

The utility model discloses a photovoltaic module. The photovoltaic module comprises a battery string group, a back plate, a first film strip group and a second film strip group, wherein the battery string group comprises a plurality of battery strings; the first film strip group comprises a plurality of first film strips extending in the first direction, and the first film strips are arranged in gaps between every two adjacent battery strings in the second direction; the second film strip group comprises a plurality of second film strips extending along the second direction, and the second film strips are arranged in gaps between every two adjacent battery pieces in the first direction; the first film strip and the second film strip are adhered to the back plate through at least part of the intersection points. According to the photovoltaic module, the two groups of the first film strip and the second film strip which are perpendicular to each other on the back plate are bonded on the back plate only at the intersection point, so that when the bonding processing of the first film strip and the second film strip is implemented, only the intersection point position of the first film strip and the second film strip needs to be heated, the whole film strip does not need to be heated, the energy consumption can be effectively reduced, and the production efficiency is improved. And the bonding efficiency of the film strips is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and particularly to a photovoltaic module. Background Art

[0002] In order to increase the illumination area of sunlight on a photovoltaic module and improve the photoelectric conversion amount, many manufacturers have started to provide reflective film strips on the back plate of the photovoltaic module. The reflective film strips can effectively reflect the sunlight passing through the gaps between the solar cells and between the battery strings onto the solar cells, thereby making full use of the sunlight irradiated on the photovoltaic module and improving the photoelectric conversion rate.

[0003] Currently, when bonding each reflective film strip to the back plate of the photovoltaic module, the entire reflective film strip is often heated to release the viscosity of the whole strip and then bonded to the back plate. This method of heating the entire reflective film strip is relatively energy-consuming. Summary of the Utility Model

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a photovoltaic module, which includes the following technical solutions:

[0005] This application provides a photovoltaic module, which includes: a battery string group, a back plate, and a first film strip group and a second film strip group, where:

[0006] The battery string group includes a plurality of battery strings. Each battery string includes a plurality of solar cells arranged at intervals along a first direction. The plurality of battery strings are arranged side by side and at intervals along a second direction, and the first direction is perpendicular to the second direction;

[0007] The first film strip group includes a plurality of first film strips extending along the first direction. The first film strips are arranged at the gaps between every two adjacent battery strings in the second direction; the second film strip group includes a plurality of second film strips extending along the second direction. The second film strips are arranged at the gaps between every two adjacent solar cells in the first direction;

[0008] The first film strips and the second film strips intersect perpendicularly to form a plurality of intersection points. The first film strips and the second film strips are bonded to the back plate through at least some of the intersection points.

[0009] Based on the above photovoltaic module, the two groups of mutually perpendicular first film strips and second film strips on the back plate are only bonded to the back plate at the intersection points. Therefore, when implementing the bonding process of the first film strips and the second film strips, only the intersection positions of the first film strips and the second film strips need to be heated, and there is no need to heat the entire film strip, which can effectively reduce energy consumption. In addition, by heating the intersection positions once, the viscosities of the two film strips can be released simultaneously and bonded to the back plate, improving the bonding efficiency of the film strips.

[0010] Optionally, the first film strip group further includes two first side film strips extending along the first direction. The two first side film strips are respectively arranged on both sides of the battery string group in the second direction, and the two first side film strips are respectively bonded to the two side edges of the backplane in the second direction; the second film strip group further includes two second side film strips extending along the second direction. The two second side film strips are respectively arranged on both sides of the battery string group in the first direction, and the two second side film strips are bonded to the two side edges of the backplane in the first direction;

[0011] A rectangular area is enclosed between the two first side film strips and the two second side film strips;

[0012] At least two ends of each first side film strip are bonded to the backplane, and at least two ends of each second side film strip are bonded to the backplane.

[0013] Based on the above setting method of the film strip group, the first film strip group and the second film strip group fill the gap between the battery string group and the side edge of the backplane, so as to further increase the light reflection area, further improve the light reflection efficiency of the film strip group, and each first side film strip and second side film strip are respectively bonded to the backplane through at least two end points, without heating the whole side film strip, further reducing the energy consumption during film strip bonding.

[0014] Optionally, the two first side film strips intersect head to tail, and the two first side film strips and the two second side film strips are bonded to the backplane at least through the four intersections formed by the intersection.

[0015] Based on the above setting method of the film strip group, since the connection parts of the first side film strip and the second side film strip intersect, the positions of the intersections can be heated, so that the first side film strip and the second side film strip release viscosity simultaneously and are bonded to the backplane, further improving the bonding efficiency of the film strip and reducing the energy consumption during film strip bonding at the same time.

[0016] Optionally, the two first side film strips respectively intersect with the ends of each second film strip, and each intersection of the first side film strip and each second film strip is bonded to the backplane; the two second side film strips respectively intersect with the ends of each first film strip, and each intersection of the second side film strip and each first film strip is bonded to the backplane.

[0017] Based on the above setting method of the film strip group, a reliable mesh film strip group can be formed on the rectangular area surrounded by the first side film strip and the second side film strip, ensuring the bonding reliability of the whole film strip group to the backplane, and all bonding points are located at the intersections of the two film strips, and fewer bonding points can be used to achieve more stable and reliable bonding of the film strip group to the backplane.

[0018] Optionally, each string in the battery string group forms two battery units, each battery unit includes a plurality of battery strings arranged side by side and spaced apart in the second direction, and the two battery units are spaced apart in the first direction;

[0019] The photovoltaic module further includes a third side film strip extending in the second direction, the third side film strip is located between the two battery units, both ends of the third side film strip intersect with the first side film strips on both sides of the back plate respectively, the middle part of the third side film strip intersects with each first film strip respectively and forms intersections, and each intersection on the third side film strip is bonded to the back plate.

[0020] Based on the above setting of the third side film strip, the gap between the two battery units can be filled, and the gap can be made to reflect light, improving the power generation efficiency; at the same time, the third side film strip can provide reliable and stable connection points for the first film strips arranged on the back plate.

[0021] Optionally, at least some of the intersections for bonding the first film strip and the second film strip to the back plate are staggered in the first direction and / or the second direction.

[0022] Based on the above arrangement, the number of bonding points can be reduced while ensuring the bonding effect of the first film strip and the second film strip, further reducing the energy consumption during film strip bonding.

[0023] Optionally, the distance between any two adjacent intersections bonded to the back plate on the same first film strip is less than 400 mm, and the distance between any two adjacent intersections bonded to the back plate on the same second film strip is less than 400 mm.

[0024] Based on the above limitation on the distance between the intersections for bonding to the back plate, it can not only ensure reliable and stable bonding of all film strips, reduce the situation of partial sagging (detaching from the back plate) between two adjacent bonding points on the film strip, setting an appropriate bonding point distance can also effectively improve the bonding efficiency, and at the same time reduce the interference between the devices for heating adjacent bonding points.

[0025] Optionally, each first film strip has at least three intersections for bonding to the back plate, and each second film strip has at least three intersections for bonding to the back plate.

[0026] Based on the above limitation on the intersections for bonding to the back plate, it can at least ensure that there is at least one intersection for bonding to the back plate between the two ends of the first film strip and the second film strip, thus avoiding the situation where the distance between two bonding points is the same as the total length of the first film strip or the second film strip, resulting in partial sagging (detaching from the back plate) between the two bonding points of the first film strip or the second film strip.

[0027] Optionally, the widths of the first side film strip and the second side film strip are both greater than the widths of the first film strip and the second film strip; and / or,

[0028] The first film strip, the second film strip, the first side film strip, and the second side film strip are all reflective film strips.

[0029] Based on the above settings of the film strip group, the first side film strip and the second side film strip are wider than the first film strip and the second film strip, and have a larger contact area with the back plate. A rectangular frame structure that is more firmly and reliably connected to the back plate can be formed at the peripheral edge of the back plate. At the same time, after the light passes through the gaps between the battery strings or the gaps between the battery cells, it continues to be reflected by the first film strip, the second film strip, the first side film strip, and the second side film strip, and the light can be reflected onto the battery cells, thereby making full use of the light irradiated on the photovoltaic module and significantly improving the photoelectric conversion rate.

[0030] Optionally, the photovoltaic module further includes a front plate, a first encapsulant layer, and a second encapsulant layer. The front plate, the first encapsulant layer, the battery string group, the second encapsulant layer, and the back plate are sequentially stacked, and the first film strip group and the second film strip group are disposed between the second encapsulant layer and the back plate.

[0031] Based on the above photovoltaic module, both sides of the battery string group are adhesively fixed to the front plate and the back plate through the first encapsulant layer and the second encapsulant layer respectively, which can achieve reliable encapsulation of the battery string group. Description of the Drawings

[0032] Referring to the drawings, the disclosure of the present application will become easier to understand. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, where:

[0033] Figure 1 is a schematic structural diagram of the film strip laid on the back plate in one embodiment of the present application;

[0034] Figure 2 is a schematic structural diagram of the photovoltaic module in one embodiment of the present application;

[0035] Figure 3 is a schematic structural diagram of the battery string group in one embodiment of the present application.

[0036] Description of the Reference Numerals

[0037] 10. Photovoltaic module; 11. Battery string group; 111. Battery string; 1111. Battery cell; 12. Back plate; 13. Front plate; 14. Film strip group; 1411. First film strip; 1412. First side film strip; 1421. Second film strip; 1422. Second side film strip; 143. Third side film strip; 151. First encapsulant layer; 152. Second encapsulant layer. Detailed Description of the Embodiments

[0038] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0039] Currently, when bonding each reflective film strip to the backplane of a photovoltaic module, the entire reflective film strip is often heated so that the entire reflective film strip releases its adhesiveness and is bonded to the backplane. This method of heating the entire reflective film strip is relatively energy-consuming.

[0040] Based on this, the present application provides a photovoltaic module. Two sets of mutually perpendicular first film strips and second film strips on the backplane are bonded to the backplane only at the intersection points. Therefore, when implementing the bonding process of the first film strip and the second film strip, only the intersection positions of the first film strip and the second film strip need to be heated, without heating the entire film strip, which can effectively reduce energy consumption. In addition, by heating the intersection positions once, the two film strips can simultaneously release their adhesiveness and be bonded to the backplane, improving the bonding efficiency of the film strips.

[0041] The present application will be specifically elaborated below through specific embodiments.

[0042] Refer to Figures 1 to 3 As shown, this embodiment provides a photovoltaic module 10, which includes: a battery string group 11, a backplane 12, and a film strip group 14. The film strip group 14 includes a first film strip group and a second film strip group, where: the battery string group 11 includes a plurality of battery strings 111, each battery string 111 includes a plurality of solar cells 1111 arranged at intervals in a first direction, and the plurality of battery strings 111 are arranged side by side at intervals in a second direction. The first direction is perpendicular to the second direction. Among them, the length direction of the solar cell 1111 can be the second direction, and the width direction is the first direction. The plurality of solar cells 1111 are arranged in the first direction to form a battery string 111, and the plurality of battery strings 111 are arranged in the second direction to form a battery string group 11; the first film strip group includes a plurality of first film strips 1411 extending in the first direction, and the first film strips 1411 are arranged at the gaps between every two adjacent battery strings 111 in the second direction to fill the gaps between two adjacent battery strings 111. When light passes through the gap between two adjacent battery strings 111, it can be reflected by the first film strip 1411 for secondary collection; the second film strip group includes a plurality of second film strips 1421 extending in the second direction, and the second film strips 1421 are arranged at the gaps between every two adjacent solar cells 1111 in the first direction to fill the gaps between two adjacent solar cells 1111. When light passes through the gap between two adjacent solar cells 1111, it can be reflected by the second film strip 1421 for secondary collection; the first film strips 1411 and the second film strips 1421 intersect perpendicularly to form a plurality of intersection points, and the first film strips 1411 and the second film strips 1421 are bonded to the backplane 12 through at least some of the intersection points.

[0043] Optionally, all the intersection points formed by the intersection of the first film strip 1411 and the second film strip 1421 can be heated, or selectively, some of the intersection points formed by the intersection of the first film strip 1411 and the second film strip 1421 can be heated, as long as it can ensure that the first film strip 1411 and the second film strip 1421 are stably bonded to the backplane 12 at the heated intersection points.

[0044] In the photovoltaic module 10 provided in this embodiment, the two sets of mutually perpendicular first film strips 1411 and second film strips 1421 on the backplane 12 are bonded to the backplane 12 only at the intersection points. Therefore, when performing the bonding process of the first film strip 1411 and the second film strip 1421, only the intersection points of the first film strip 1411 and the second film strip 1421 need to be heated, and there is no need to heat the entire film strip, which can effectively reduce energy consumption. In addition, by heating the intersection points once, the two film strips can simultaneously release their adhesiveness and be bonded to the backplane 12, improving the bonding efficiency of the film strips.

[0045] Continue to refer to Figure 1 As shown, in some embodiments, the first film strip group further includes two first side film strips 1412 extending along the first direction. The two first side film strips 1412 are respectively arranged on both sides of the battery string group 11 in the second direction, and the two first side film strips 1412 are respectively bonded to the two side edges of the backplane 12 in the second direction; the second film strip group further includes two second side film strips 1422 extending along the second direction. The two second side film strips 1422 are respectively arranged on both sides of the battery string group 11 in the first direction, and the two second side film strips 1422 are bonded to the two side edges of the backplane 12 in the first direction; a rectangular area is enclosed between the two first side film strips 1412 and the two second side film strips 1422; at least two ends of each first side film strip 1412 are bonded to the backplane 12, and at least two ends of each second side film strip 1422 are bonded to the backplane 12.

[0046] Optionally, the length of the first side film strip 1412 can match the length of the backplane 12 in the first direction, or each first side film strip 1412 can be composed of two film strips, and the length of each film strip matches half of the length of the backplane 12 in the first direction; the length of the second side film strip 1422 can match the length of the backplane 12 in the second direction; so that the first side film strips 1412 and the second side film strips 1422 can exactly enclose a rectangular area matching the shape of the backplane 12.

[0047] Among them, the first film strip group and the second film strip group fill the gap between the battery string group 11 and the side edge of the backplane 12, so as to further increase the light reflection area, further improve the light reflection efficiency of the film strip group 14, and each first side film strip 1412 and second side film strip 1422 are respectively bonded to the backplane 12 through at least two end points, without heating the whole side film strip, further reducing the energy consumption during film strip bonding.

[0048] Continue to refer to Figure 1 As shown, in some embodiments, the two first side film strips 1412 and the two second side film strips 1422 intersect end to end, and the two first side film strips 1412 and the two second side film strips 1422 are bonded to the backplane 12 at least through the four intersection points formed by the intersection; that is, the four vertices of the rectangular area formed by enclosing the first side film strip 1412 and the second side film strip 1422 are all bonded to the backplane 12. Specifically, since the connection parts of the first side film strip 1412 and the second side film strip 1422 intersect, the positions of the intersection points can be heated, so that the two film strips of the first side film strip 1412 and the second side film strip 1422 can simultaneously release adhesiveness and be bonded to the backplane 12, further improving the bonding efficiency of the film strips and reducing the energy consumption during film strip bonding at the same time.

[0049] In some embodiments, the two first side film strips 1412 respectively intersect with the ends of each second film strip 1421, and each intersection point of the first side film strip 1412 and each second film strip 1421 is bonded to the backplane 12. Optionally, the two ends of the first side film strip 1412 are respectively connected to the two second side film strips 1422 and are bonded to the backplane 12, and the intersection points of the first side film strip 1412 and each second film strip 1421 are also bonded to the backplane 12; the two second side film strips 1422 respectively intersect with the ends of each first film strip 1411, and each intersection point of the second side film strip 1422 and each first film strip 1411 is bonded to the backplane 12. Optionally, the two ends of the second side film strip 1422 are respectively connected to the two first side film strips 1412 and are bonded to the backplane 12, and the intersection points of the second side film strip 1422 and each first film strip 1411 are also bonded to the backplane 12; in this way, a reliable mesh film strip group 14 can be formed on the rectangular area formed by surrounding the first side film strip 1412 and the second side film strip 1422, ensuring the bonding reliability of the entire film strip group 14 to the backplane 12, and all the bonding points are located at the intersection points of the two film strips, enabling the film strip group 14 to be more stably and reliably bonded to the backplane 12 with fewer bonding points.

[0050] In a further embodiment, each battery string 111 in the battery string group 11 forms two battery units. Each battery unit includes a plurality of battery strings 111 arranged side by side and spaced apart in the second direction. The two battery units are spaced apart in the first direction. The photovoltaic module 10 further includes a third side film strip 143 extending in the second direction. The third side film strip 143 is located between the two battery units. The two ends of the third side film strip 143 respectively intersect with the first side film strips 1412 on both sides of the back plate 12. The middle part of the third side film strip 143 respectively intersects with each first film strip 1411 to form an intersection point, and each intersection point on the third side film strip 143 is bonded to the back plate 12.

[0051] Specifically, the length of the first film strip 1411 can be the same as the length of one battery unit in the first direction. At this time, one end of each first film strip 1411 forms an intersection point with one of the second side film strips 1422 and is bonded to the back plate 12, and the other end forms an intersection point with the third side film strip 143 and is bonded to the back plate 12. Or the length of the first film strip 1411 can be the same as the sum of the lengths of the two battery units in the first direction. At this time, both ends of each first film strip 1411 respectively form intersection points with the two second side film strips 1422 and are bonded to the back plate 12, and the midpoint position of each first film strip 1411 forms an intersection point with the third side film strip 143 and is bonded to the back plate 12.

[0052] Through the setting of the third side film strip 143, the gap between the two battery units can be filled, and the gap can be made to reflect light, improving the power generation efficiency. At the same time, the third side film strip 143 can provide a reliable and stable connection point for the first film strips 1411 arranged on the back plate 12.

[0053] In some embodiments, at least some of the intersection points for bonding the first film strips 1411 and the second film strips 1421 to the back plate 12 are staggered in the first direction and / or the second direction. Such a setting can reduce the bonding points while ensuring that after all the first film strips 1411 and the second film strips 1421 are arranged in a vertically staggered network structure, they can still be stably and reliably bonded and fixed to the back plate 12.

[0054] In some embodiments, the distance between any two adjacent intersection points where the same first film strip 1411 is adhered to the backplane 12 is less than 400 mm, such as 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 390 mm; the distance between any two adjacent intersection points where the same second film strip 1421 is adhered to the backplane 12 is less than 400 mm, such as 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 390 mm; after the film strip group 14 is adhered to the backplane 12, the backplane 12 needs to be flipped 180° and then combined with the battery string group 11 for glass combination operation. By setting the distance between adjacent two bonding points to be less than 400 mm, it can be avoided that when the backplane 12 is flipped for glass combination, the film strip between two adjacent bonding points on the same film strip sags due to being too long, affecting the glass combination quality of the entire photovoltaic module 10.

[0055] In some embodiments, each first film strip 1411 has at least three intersection points for adhering to the backplane 12, and each second film strip 1421 has at least three intersection points for adhering to the backplane 12; that is to say, both the first film strip 1411 and the second film strip 1421 can be connected to two film strips at both ends respectively, and there is at least one bonding point that intersects with another film strip and adheres to the backplane 12 at the middle position between the two ends; such a setting can at least ensure that there is at least one intersection point for adhering to the backplane 12 between the two ends of the first film strip 1411 and the second film strip 1421, thereby avoiding the situation where the distance between two bonding points is the same as the total length of the first film strip 1411 or the second film strip 1421, resulting in the part between the two bonding points of the first film strip 1411 or the second film strip 1421 being prone to sagging (detaching from the backplane 12).

[0056] Continue to refer to Figure 1As shown, the widths of the first side film strip 1412 and the second side film strip 1422 are both greater than the widths of the first film strip 1411 and the second film strip 1421. The first side film strip 1412 and the second side film strip 1422 have a larger width compared to the first film strip 1411 and the second film strip 1421, and a larger contact area with the back plate 12, and can form a rectangular frame structure that is more firmly and reliably connected to the back plate 12 at the peripheral edge of the back plate 12; and / or, the first film strip 1411, the second film strip 1421, the first side film strip 1412, and the second side film strip 1422 are all reflective film strips. After the light passes through the gaps between the battery strings 111 or the gaps between the battery cells 1111, through the reflection of the first film strip 1411, the second film strip 1421, the first side film strip 1412, and the second side film strip 1422, the light can be reflected onto the battery cells 1111, so as to make full use of the light irradiated on the photovoltaic module 10 and significantly improve the photoelectric conversion rate; it can also be that one or more of the film strips are reflective film strips, as long as the light passing through the gaps between the battery cells 1111 and the gaps between the battery strings 111 can be reflected and reflected onto the battery cells 1111 for power generation to improve the photoelectric conversion rate.

[0057] Continue to refer to Figure 2 As shown, specifically, the photovoltaic module 10 further includes a front plate 13, a first encapsulant layer 151, and a second encapsulant layer 152. The front plate 13, the first encapsulant layer 151, the battery string group 11, the second encapsulant layer 152, and the back plate 12 are sequentially stacked, and the first film strip group and the second film strip group are arranged between the second encapsulant layer 152 and the back plate 12; wherein, both sides of the battery string group 11 are adhesively fixed to the front plate 13 and the back plate 12 through the first encapsulant layer 151 and the second encapsulant layer 152 respectively, which can realize reliable encapsulation of the battery string group 11.

[0058] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A photovoltaic module, characterized in that, The photovoltaic module includes: a battery string group, a backplane, and a first film strip group and a second film strip group, wherein: The battery string group includes a plurality of battery strings, each battery string includes a plurality of solar cells arranged at intervals in a first direction, and the plurality of battery strings are arranged side by side at intervals in a second direction, the first direction being perpendicular to the second direction; The first film strip group includes a plurality of first film strips extending in the first direction, and the first film strips are disposed at gaps between every two adjacent battery strings in the second direction; the second film strip group includes a plurality of second film strips extending in the second direction, and the second film strips are disposed at gaps between every two adjacent solar cells in the first direction; The first film strips and the second film strips intersect perpendicularly to form a plurality of intersection points, and the first film strips and the second film strips are bonded to the backplane through at least some of the intersection points.

2. The photovoltaic module according to claim 1, wherein, The first film strip group further includes two first side film strips extending in the first direction, and the two first side film strips are respectively arranged on two sides of the battery string group in the second direction, and the two first side film strips are respectively bonded to two side edges of the backplane in the second direction; the second film strip group further includes two second side film strips extending in the second direction, and the two second side film strips are respectively arranged on two sides of the battery string group in the first direction, and the two second side film strips are bonded to two side edges of the backplane in the first direction; A rectangular area is enclosed between the two first side film strips and the two second side film strips; At least two ends of each of the first side film strips are bonded to the backplane, and at least two ends of each of the second side film strips are bonded to the backplane.

3. The photovoltaic module according to claim 2, wherein, The two first side film strips and the two second side film strips intersect end to end, and the two first side film strips and the two second side film strips are bonded to the backplane through at least four intersection points formed by the intersection.

4. The photovoltaic module according to claim 2, wherein The two first side film strips respectively intersect with the ends of the second film strips, and each intersection point of the first side film strip and each second film strip is bonded to the backplane; the two second side film strips respectively intersect with the ends of the first film strips, and each intersection point of the second side film strip and each first film strip is bonded to the backplane.

5. The photovoltaic module according to claim 2, characterized in that, The battery strings in the battery string group form two battery units, each battery unit includes a plurality of battery strings arranged side by side at intervals in the second direction, and the two battery units are arranged at intervals in the first direction; The photovoltaic module further includes a third side film strip extending in the second direction, the third side film strip is located between the two battery units, the two ends of the third side film strip respectively intersect with the first side film strips on both sides of the backplane, the middle part of the third side film strip respectively intersects with each first film strip and forms intersection points, and each intersection point on the third side film strip is bonded to the backplane.

6. The photovoltaic module according to claim 1, wherein At least some of the intersection points for bonding the first film strips and the second film strips to the backplane are arranged staggered in the first direction and / or the second direction.

7. The photovoltaic module according to claim 1, characterized in that, The distance between any two adjacent intersection points bonded to the backplane on the same first film strip is less than 400 mm, and the distance between any two adjacent intersection points bonded to the backplane on the same second film strip is less than 400 mm.

8. The photovoltaic module according to claim 1, characterized in that, Each of the first film strips has at least three intersection points for bonding the backplane, and each of the second film strips has at least three intersection points for bonding the backplane.

9. The photovoltaic module according to claim 2, characterized in that, The widths of the first side film strip and the second side film strip are both greater than the widths of the first film strip and the second film strip; and / or, The first film strip, the second film strip, the first side film strip and the second side film strip are all reflective film strips.

10. The photovoltaic module according to any one of claims 1 to 9, characterized in that, The photovoltaic module further includes a front plate, a first encapsulant layer and a second encapsulant layer. The front plate, the first encapsulant layer, the battery string group, the second encapsulant layer and the backplane are sequentially stacked, and the first film strip group and the second film strip group are disposed between the second encapsulant layer and the backplane.

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