Photovoltaic module

Abstract

The utility model provides a photovoltaic assembly. The photovoltaic assembly comprises a front packaging layer and a battery structure arranged on one side of the front packaging layer. The front packaging layer comprises a packaging base material and a conductive film stacked on the packaging base material; the battery structure comprises a solar battery pack, the solar battery pack comprises a first battery and a second battery, the first battery is provided with a first P-type part close to a front packaging layer and a first N-type part far away from the front packaging layer, and the second battery is provided with a second N-type part close to the front packaging layer and a second P-type part far away from the front packaging layer. The first P-type part and the second N-type part are connected through a conductive film. Therefore, the material cost of the photovoltaic module is reduced, and the photoelectric conversion efficiency is improved.

Description

Technical Field

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

[0002] A solar cell is a device that can receive light and generate photogenerated carriers. The core component of a solar cell is a PN junction. On the basis of the PN junction, the actual structure of a solar cell usually also includes a grid electrode for extracting photogenerated carriers, and the grid electrode is currently usually formed by curing a conductive silver paste. In conventional technology, the relative front and back sides of many solar cells are provided with grid electrodes, and the grid electrodes are usually arranged densely. This not only leads to a higher material cost of the solar cell, but also blocks the light-receiving surface of the solar cell, causing the photoelectric conversion efficiency of the solar cell to be lost. Utility Model Content

[0003] Based on this, in order to reduce the number of grid line electrodes on the light-receiving surface of the solar cell or avoid introducing grid line electrodes on the light-receiving surface of the solar cell, it is necessary to provide a photovoltaic module.

[0004] According to some embodiments of the utility model, a photovoltaic module is provided, which includes a first battery, a second battery and a conductive film; the first battery and the second battery both have a front side and a back side arranged opposite to each other, the first battery has a first N terminal arranged on the front side and a first P terminal arranged on the back side, the second battery has a second P terminal arranged on the front side and a second N terminal arranged on the back side, the conductive film is arranged on the front side of the first battery and on the front side of the second battery, and the conductive film is electrically connected to the first N terminal and the second P terminal.

[0005] In some embodiments of the present application, the first battery includes a first front conductive layer located at the outermost side, the second battery includes a second front conductive layer located at the outermost side, and the conductive film is directly connected to the first front conductive layer and the second front conductive layer.

[0006] In some embodiments of the present application, the conductive film is a transparent conductive film.

[0007] In some embodiments of the present application, the first battery, the second battery and the conductive film constitute a solar battery group, and the photovoltaic module includes a plurality of solar battery groups arranged in parallel.

[0008] In some embodiments of the present application, the photovoltaic module also includes a battery pack connector, two adjacent solar cell groups are electrically connected through the battery pack connector, and the battery pack connector is connected to a first P terminal in one of the solar cell groups and a second N terminal in another solar cell group.

[0009] In some embodiments of the present application, the first cell includes a first back electrode located at the outermost side, the second cell includes a second back electrode located at the outermost side, and the battery group connector is connected to the first back electrode in one of the battery groups and the second back electrode in another of the solar cell groups.

[0010] In some embodiments of the present application, the battery pack connector is a welding ribbon, and the welding ribbon is welded to the first back electrode and the second back electrode.

[0011] In some embodiments of the present application, the photovoltaic component also includes a first bus bar and a second bus bar, and the multiple solar cell groups include a first battery and a second battery located at both ends respectively, and the first bus bar and the second bus bar are electrically connected to the first P end and the second N end respectively.

[0012] In some embodiments of the present application, the photovoltaic module further includes a front encapsulation layer, the front encapsulation layer is disposed on a side of the conductive film away from the first battery and the second battery, and the conductive film is adhered to the front encapsulation layer.

[0013] In some embodiments of the present application, the photovoltaic module further includes a back side encapsulation layer, and the back side encapsulation layer is disposed on a side of the first cell and the second cell away from the conductive film.

[0014] In some embodiments of the present application, the photovoltaic module also includes a front packaging plate and a back packaging plate, the first battery, the second battery and the conductive film are arranged between the front packaging plate and the back packaging plate, and the front packaging plate is arranged on the side of the conductive film away from the first battery and the second battery.

[0015] In some embodiments of the present application, the first battery includes a first silicon substrate, a first N-type doped silicon layer and a first P-type doped silicon layer, and the first N-type doped silicon layer and the first P-type doped silicon layer are stacked on the front and back sides of the first silicon substrate, respectively.

[0016] In some embodiments of the present application, the second battery includes a second silicon substrate, a second N-type doped silicon layer and a second P-type doped silicon layer, and the second N-type doped silicon layer and the second P-type doped silicon layer are stacked on the back and front sides of the second silicon substrate, respectively.

[0017] In conventional technology, a grid electrode is usually arranged on the front of a solar cell, and a welding strip is used to connect the grid electrodes on adjacent solar cells when the solar cells are assembled into a photovoltaic module. This arrangement requires more grid electrodes.

[0018] The photovoltaic module of the utility model includes a first battery, a second battery and a conductive film. The first battery has a first N terminal arranged on the front and a first P terminal arranged on the back, and the second battery has a second P terminal arranged on the front and a second N terminal arranged on the back. The first N terminal and the second P terminal are arranged on the front at the same time, and the first N terminal and the second P terminal are electrically connected through the conductive film, which can reduce the demand for grid line electrodes on the front side of the solar cell, thereby reducing the number of grid line electrodes on the light-receiving surface of the solar cell, and even making it unnecessary to introduce additional grid line electrodes on the front side of the solar cell. This also reduces the material cost of the photovoltaic module and improves the photoelectric conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a cross-sectional structure of a photovoltaic module;

[0020] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure of a first battery;

[0021] Figure 3 for Figure 1 A schematic diagram of a cross-sectional structure of a second battery in FIG.

[0022] The reference numerals and their meanings are as follows:

[0023] 10. Solar cell group; 11. First battery; 11N. First N terminal; 11P. First P terminal; 12. Second battery; 12N. Second N terminal; 12P. Second P terminal; 13. Conductive film; 20. Front encapsulation layer; 30. Battery pack connector; 41. Head end bus bar; 42. Tail end bus bar; 50. Back encapsulation layer; 60. Front encapsulation board; 70. Back encapsulation board; 110. First silicon substrate; 111. First N-type doped silicon layer; 112. First front conductive layer; 113. First P-type doped silicon layer; 114. First back conductive layer; 115. First back electrode; 120. Second silicon substrate; 121. Second P-type doped silicon layer; 122. Second front conductive layer; 123. Second N-type doped silicon layer; 124. Second back conductive layer; 125. Second back electrode. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively in combination with the embodiments and the effect diagrams. The embodiments provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed" to another element, it may be directly fixed to another original part or there may also be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. In addition, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integrated connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, or an indirect connection through an intermediate medium, or it may be internal communication between two elements. It should be understood that it is possible for those skilled in the art to understand the specific meanings of the above terms according to the specific circumstances without causing ambiguity.

[0026] Unless otherwise specified, in the description of the present invention, terms indicating orientation or positional relationship, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside", are based on the orientation or positional relationship shown in the drawings of the utility model. They are only for the convenience and simplification of the description of the content of the utility model and to help readers understand the description in conjunction with the drawings. They do not limit or imply a specific orientation that the device or element referred to must have, and therefore should not be understood as a limitation on the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used herein 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. The term "and / or" used herein includes any and all combinations of one or more related listed items. "Multiple" herein includes a combination of two or more than two items.

[0028] The utility model provides a photovoltaic component, which includes a first battery, a second battery and a conductive film. The first battery and the second battery both have a front side and a back side that are arranged oppositely, the first battery has a first N terminal arranged on the front side and a first P terminal arranged on the back side, the second battery has a second P terminal arranged on the front side and a second N terminal arranged on the back side, the conductive film is arranged on the front side of the first battery and the front side of the second battery, and the conductive film is electrically connected to the first N terminal and the second P terminal.

[0029] In conventional technology, a grid electrode is usually arranged on the front of a solar cell, and a welding strip is used to connect the grid electrodes on adjacent solar cells when the solar cells are assembled into a photovoltaic module. This arrangement requires more grid electrodes.

[0030] The photovoltaic module of the utility model includes a first battery, a second battery and a conductive film. The first battery has a first N terminal arranged on the front and a first P terminal arranged on the back, and the second battery has a second P terminal arranged on the front and a second N terminal arranged on the back. The first N terminal and the second P terminal are arranged on the front at the same time, and the first N terminal and the second P terminal are electrically connected through the conductive film, which can reduce the demand for grid line electrodes on the front side of the solar cell, thereby reducing the number of grid line electrodes on the light-receiving surface of the solar cell, and even making it unnecessary to introduce additional grid line electrodes on the front side of the solar cell. This also reduces the material cost of the photovoltaic module and improves the photoelectric conversion efficiency.

[0031] Figure 1 This is a schematic diagram of the cross-sectional structure of a photovoltaic module of the utility model. Figure 1 As shown, the photovoltaic module includes a first cell 11, a second cell 12 and a conductive film 13. The conductive film 13 is arranged on the front side of the first cell 11 and the front side of the second cell 12.

[0032] Further, Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the first battery 11 in FIG. Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the second battery 12. Figure 1~Figure 3 As shown, the first battery 11 has a first N terminal 11N disposed on the front side and a first P terminal 11P disposed on the back side, and the second battery 12 has a second P terminal 12P and a second N terminal 12N disposed on the front side. A conductive film 13 is disposed on the front side of the first battery 11 and the front side of the second battery 12, and the conductive film 13 is electrically connected to the first N terminal 11N and the second P terminal 12P.

[0033] It is understood that a solar cell contains a PN junction, and a PN junction contains a P terminal and an N terminal. In the present invention, the "P terminal" refers to a side surface of the solar cell that derives holes when the solar cell is working, and the "N terminal" refers to a side surface of the solar cell that derives electrons when the solar cell is working.

[0034] Reference Figure 2 and Figure 3 As shown, the first battery 11 may include a first front conductive layer 112 located at the outermost side, the second battery 12 may include a second front conductive layer 122 located at the outermost side, and the conductive film 13 may be directly connected to the first front conductive layer 112 and the second front conductive layer 122 .

[0035] Reference Figure 2 As shown, in some examples of this embodiment, the first battery 11 includes a first silicon substrate 110 .

[0036] In some examples of this embodiment, the first silicon substrate 110 may include a doped silicon material. In this embodiment, the doping type of the first silicon substrate 110 may be N-type.

[0037] Further, the first cell 11 may also include a first N-type doped silicon layer 111 and a first P-type doped silicon layer 113 stacked on the first silicon substrate 110, wherein the first N-type doped silicon layer 111 is stacked on the front side of the first silicon substrate 110, and the first P-type doped silicon layer 113 is stacked on the back side of the first silicon substrate 110. It can be understood that the first cell 11 including the first P-type doped silicon layer 113 and the first N-type doped silicon layer 111 may be a heterojunction solar cell.

[0038] In some examples of this embodiment, the substrate of the first N-type doped silicon layer 111 may include amorphous silicon or microcrystalline silicon, and the doping element in the first N-type doped silicon layer 111 may be selected from one or more of phosphorus and arsenic.

[0039] In some examples of this embodiment, the substrate of the first P-type doped silicon layer 113 may include amorphous silicon or microcrystalline silicon, and the doping element in the first P-type doped silicon layer 113 may be selected from one or more of boron, aluminum and gallium.

[0040] Reference Figure 3 As shown, in some examples of this embodiment, the second battery 12 includes a second silicon substrate 120 .

[0041] In some examples of this embodiment, the second silicon substrate 120 may include a doped silicon material. In this embodiment, the doping type of the second silicon substrate 120 may be N-type.

[0042] Reference Figure 3 As shown, in some examples of this embodiment, the second cell 12 may further include a second N-type doped silicon layer 123 and a second P-type doped silicon layer 121, wherein the second N-type doped silicon layer 123 is stacked on the back side of the second silicon substrate 120, and the second P-type doped silicon layer 121 is stacked on the front side of the second silicon substrate 120. It can be understood that the second cell 12 including the second P-type doped silicon layer 121 and the second N-type doped silicon layer 123 may be a heterojunction solar cell.

[0043] In some examples of this embodiment, the substrate of the second P-type doped silicon layer 121 may include amorphous silicon or microcrystalline silicon, and the doping element in the second P-type doped silicon layer 121 may be selected from one or more of boron, aluminum and gallium.

[0044] In some examples of this embodiment, the substrate of the second N-type doped silicon layer 123 may include amorphous silicon or microcrystalline silicon, and the doping element in the second N-type doped silicon layer 123 may be selected from one or more of phosphorus and arsenic.

[0045] In some examples of this embodiment, the structures of the first battery 11 and the second battery 12 may be the same. Also, the second battery 12 is inverted relative to the first battery 11. For example, referring to Figure 2 and Figure 3 In the orientation shown, in the first battery 11 , the first N-type doped silicon layer 111 is disposed above the first P-type doped silicon layer 113 , and in the second battery 12 , the second N-type doped silicon layer 123 is disposed below the second P-type doped silicon layer 121 .

[0046] Reference Figure 2 and Figure 3 As shown, in some examples of this embodiment, the first battery 11 further includes a first front conductive layer 112 located at the outermost side, the second battery 12 includes a second front conductive layer 122 located at the outermost side, and the conductive film 13 is directly connected to the first front conductive layer 112 and the second front conductive layer 122. Further, the first front conductive layer 112 is stacked on a side of the first N-type doped silicon layer 111 away from the first silicon substrate 110, and the second front conductive layer 122 is stacked on a side of the second P-type doped silicon layer 121 away from the second silicon substrate 120.

[0047] Reference Figure 2 and Figure 3 As shown, in some examples of this embodiment, the front of the first battery 11 does not have a grid electrode, so that the first front conductive layer 112 is located at the outermost side. The front of the second battery 12 does not have a grid electrode, so that the second front conductive layer 122 is located at the outermost side. The front of the first battery 11 and the second battery 12 are not provided with a grid electrode, which can save half of the material usage of the grid electrode and significantly reduce the cost of consumables. In addition, it can also increase the front light receiving area of ​​the first battery 11 and the second battery 12, thereby improving the conversion efficiency of the photovoltaic module.

[0048] Reference Figure 1 As shown, in some examples of this embodiment, the conductive film 13 may be a transparent conductive film, and the conductive film 13 may cover the first front conductive layer 112. In some examples of this embodiment, the conductive film 13 may also cover the second front conductive layer 122.

[0049] In some examples of this embodiment, the conductive film 13 may be attached to the packaging substrate. Further, the conductive film 13 may be disposed on the packaging substrate by coating.

[0050] In some examples of this embodiment, in the front encapsulation layer 20, the encapsulation substrate may also be an adhesive film. Further, the material of the encapsulation substrate may be selected from ethylene-vinyl acetate copolymer (EVA).

[0051] In some examples of this embodiment, the material of the first front conductive layer 112 may be a conductive metal oxide. For example, the material of the first front conductive layer 112 may include one or more of indium tin oxide, indium zinc oxide, indium gallium zinc oxide, aluminum-doped zinc oxide, and fluorine-doped tin oxide.

[0052] In some examples of this embodiment, the material of the second front conductive layer 122 may be a conductive metal oxide. For example, the material of the second front conductive layer 122 may include one or more of indium tin oxide, indium zinc oxide, indium gallium zinc oxide, aluminum-doped zinc oxide, and fluorine-doped tin oxide.

[0053] In some examples of this embodiment, the material of the conductive film 13 may be a conductive metal oxide, for example, the material of the conductive film 13 may include one or more of indium tin oxide, indium zinc oxide, indium gallium zinc oxide, aluminum-doped zinc oxide, and fluorine-doped tin oxide.

[0054] In some examples of this embodiment, the material of the conductive film 13 may be the same as the material of the first front conductive layer 112 and the material of the second front conductive layer 122 , which can reduce the contact resistance among the three.

[0055] Reference Figure 2 As shown, in some examples of this embodiment, the first battery 11 may further include a first back conductive layer 114 , and the first back conductive layer 114 may be stacked on a side of the first N-type doped silicon layer 111 away from the first silicon substrate 110 .

[0056] Reference Figure 3 As shown, in some examples of this embodiment, the second battery 12 may further include a second back conductive layer 124 , and the second back conductive layer 124 may be stacked on a side of the second P-type doped silicon layer 121 away from the second silicon substrate 120 .

[0057] Reference Figure 1 As shown, in some examples of this embodiment, there are multiple solar battery arrays 10, and the multiple solar battery arrays 10 are arranged in parallel.

[0058] Reference Figure 1 As shown, in some examples of this embodiment, the photovoltaic component also includes a battery pack connector 30, two adjacent solar cell groups 10 are electrically connected through the battery pack connector 30, and the battery pack connector 30 is connected to the first P terminal 11P in one of the solar cell groups 10 and the second N terminal 12N in the other solar cell group 10.

[0059] It can be understood that the battery group connector 30 is used to achieve a series connection between two adjacent solar battery groups 10. Through the battery group connector 30 and the conductive film 13, multiple battery cells in the battery structure can be connected in series in sequence.

[0060] Reference Figure 1 As shown, in some examples of this embodiment, the first cell 11 further includes a first back electrode 115, the second cell 12 further includes a second back electrode 125, and the cell group connector 30 is connected to the first back electrode 115 in one of the solar cell groups 10 and the second back electrode 125 in another solar cell group 10. It can be understood that the light intensity received by the back of the first cell 11 and the second cell 12 is significantly lower than that of the front side, or even no light is received, so the first back electrode 115 and the second back electrode 125 are arranged on the side away from the front side without significantly affecting the conversion efficiency. At the same time, the arrangement of the first back electrode 115 and the second back electrode 125 can improve the conductivity, thereby increasing the short-circuit current of the solar cell.

[0061] Reference Figure 2 and Figure 3 As shown, in some examples of this embodiment, the first back electrode 115 is disposed on a side of the first back conductive layer 114 away from the first silicon substrate 110 , and the second back electrode 125 can be disposed on a side of the second back conductive layer 124 away from the second silicon substrate 120 .

[0062] In some examples of this embodiment, the battery pack connector 30 may be a welding ribbon, and the welding ribbon is welded to the first back electrode 115 and the second back electrode 125 .

[0063] Reference Figure 1 As shown, in some examples of this embodiment, the photovoltaic module also includes a head end bus bar 41 and a tail end bus bar 42, and multiple solar cell groups 10 include a first battery 11 and a second battery 12 located at both ends respectively, wherein the first P terminal 11P and the second N terminal 12N are electrically connected to the head end bus bar 41 and the tail end bus bar 42 respectively.

[0064] It can be understood that two adjacent solar cell arrays 10 can be connected via a cell array connector 30, but there is a first P terminal 11P and a second N terminal 12N that are vacant in the two solar cell arrays 10 at both ends. In this case, the vacant first P terminal 11P and the second N terminal 12N can be connected to the head end bus bar 41 and the tail end bus bar 42 respectively, so that the current of multiple solar cell arrays 10 can be conducted to the external circuit.

[0065] Reference Figure 1As shown, in this embodiment, in the plurality of solar cell groups 10, the first P terminal 11P is located at the head end and can be connected to the head end bus bar 41. The second N terminal 12N is located at the tail end and can be connected to the tail end bus bar 42.

[0066] In some examples of this embodiment, the first P terminal 11P and the second N terminal 12N may be connected to the head-end bus bar 41 and the tail-end bus bar 42 respectively through welding strips.

[0067] Reference Figure 1 As shown, in some examples of this embodiment, the photovoltaic module may further include a back encapsulation layer 50, which is disposed on a side of the cell structure away from the front encapsulation layer 20.

[0068] In some examples of this embodiment, the back side encapsulation layer 50 may be an adhesive film. Further, the material of the back side encapsulation layer 50 may be selected from ethylene-vinyl acetate copolymer.

[0069] Reference Figure 1 As shown, in some examples of this embodiment, the photovoltaic module may further include a front encapsulation plate 60 , and the front encapsulation plate 60 may be disposed on a side of the front encapsulation layer 20 away from the battery structure.

[0070] In some examples of this embodiment, the front packaging plate 60 may be a glass plate, a quartz plate, or a sapphire plate.

[0071] Reference Figure 1 As shown, in some examples of this embodiment, the photovoltaic module may further include a back side encapsulation plate 70 , and the back side encapsulation plate 70 may be disposed on a side of the back side encapsulation layer 50 away from the battery structure.

[0072] In some examples of this embodiment, the back packaging plate 70 may be a glass plate, a quartz plate, or a sapphire plate.

[0073] In such Figure 1 In the photovoltaic module shown, the first N terminal 11N and the second P terminal 12P are electrically connected through the conductive film 13, which can reduce the demand for the grid electrode on the front of the solar cell. Furthermore, the first N terminal 11N and the second P terminal 12P do not contain the grid electrode, which can greatly save the cost of the consumables of the grid electrode, and increase the light receiving area of ​​the photovoltaic module, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0074] It can be understood that in this article, the first battery and the second battery do not imply the order of the battery cells, but are convenient for explaining the relative positions of the two. Specifically, in a solar battery group, the solar battery cell with the N terminal connected to the front encapsulation layer is the first battery, and the solar battery cell with the P terminal connected to the front encapsulation layer is the second battery.

[0075] In this article, "front" and "back" do not imply a specific orientation or direction of the component, but are used to facilitate the distinction of the orientation inside the photovoltaic component. Specifically, in a solar cell, the surface closer to the front encapsulation layer is the front, and the surface farther from the front encapsulation layer is the back. In this embodiment, the front can be the surface of the solar cell that receives light.

[0076] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A photovoltaic module, characterized in that: It comprises a first battery (11), a second battery (12) and a conductive film (13); The first battery (11) and the second battery (12) both have a front side and a back side arranged opposite to each other; the first battery (11) has a first N terminal (11N) arranged on the front side and a first P terminal (11P) arranged on the back side; the second battery (12) has a second P terminal (12P) arranged on the front side and a second N terminal (12N) arranged on the back side; the conductive film (13) is arranged on the front side of the first battery (11) and on the front side of the second battery (12), and the conductive film (13) is electrically connected to the first N terminal (11N) and the second P terminal (12P).

2. The photovoltaic module according to claim 1, characterized in that: The first battery (11) comprises a first front conductive layer (112) located at the outermost side, the second battery (12) comprises a second front conductive layer (122) located at the outermost side, and the conductive film (13) is directly connected to the first front conductive layer (112) and the second front conductive layer (122).

3. The photovoltaic module according to claim 2, characterized in that: The conductive film (13) is a transparent conductive film.

4. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The first cell (11), the second cell (12) and the conductive film (13) form a solar cell group (10), and the photovoltaic module comprises a plurality of solar cell groups (10) arranged in parallel.

5. The photovoltaic module according to claim 4, characterized in that: The photovoltaic assembly further comprises a battery group connector (30), two adjacent solar battery groups (10) are electrically connected via the battery group connector (30), and the battery group connector (30) is connected to a first P terminal (11P) in one of the solar battery groups (10) and a second N terminal (12N) in another of the solar battery groups (10).

6. The photovoltaic module according to claim 5, characterized in that: The first cell (11) includes a first back electrode (115) located at the outermost side, the second cell (12) includes a second back electrode (125) located at the outermost side, and the cell group connector (30) is connected to the first back electrode (115) in one of the cell groups and the second back electrode (125) in another of the solar cell groups (10).

7. The photovoltaic module according to claim 6, characterized in that: The battery pack connector (30) is a welding strip, and the welding strip is welded to the first back electrode (115) and the second back electrode (125).

8. The photovoltaic module according to claim 6, characterized in that: The photovoltaic assembly further comprises a first bus bar and a second bus bar, the plurality of solar cell groups (10) comprising a first battery (11) and a second battery (12) respectively located at two ends, the first bus bar and the second bus bar respectively being electrically connected to the first P end (11P) and the second N end (12N) thereof.

9. The photovoltaic module according to any one of claims 1 to 3 and 5 to 8, characterized in that: The photovoltaic module further comprises a front encapsulation layer (20), the front encapsulation layer (20) being arranged on a side of the conductive film (13) away from the first battery (11) and the second battery (12), and the conductive film (13) being adhered to the front encapsulation layer (20); and / or, The photovoltaic module further comprises a back side encapsulation layer (50), wherein the back side encapsulation layer (50) is arranged on a side of the first battery (11) and the second battery (12) away from the conductive film (13); and / or, The photovoltaic module further comprises a front packaging plate (60) and a back packaging plate (70); the first battery (11), the second battery (12) and the conductive film (13) are arranged between the front packaging plate (60) and the back packaging plate (70); and the front packaging plate (60) is arranged on a side of the conductive film (13) away from the first battery (11) and the second battery (12).

10. The photovoltaic module according to any one of claims 1 to 3 and 5 to 8, characterized in that: The first battery (11) comprises a first silicon substrate (110), a first N-type doped silicon layer (111) and a first P-type doped silicon layer (113), wherein the first N-type doped silicon layer (111) and the first P-type doped silicon layer (113) are stacked on the front side and the back side of the first silicon substrate (110), respectively; and / or, The second battery (12) comprises a second silicon substrate (120), a second N-type doped silicon layer (123) and a second P-type doped silicon layer (121), wherein the second N-type doped silicon layer (123) and the second P-type doped silicon layer (121) are stacked on the back side and the front side of the second silicon substrate (120), respectively.

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