Photovoltaic module and photovoltaic module array

Abstract

The utility model provides a photovoltaic module and a photovoltaic module array, relates to the field of photovoltaic technology, and aims to solve the technical problem of low reliability of the photovoltaic module. The photovoltaic module comprises a laminated piece, a frame and a rigid electric connecting piece, the frame comprises a supporting part with a cavity, and the top wall of the cavity is supported at the edge part of the back surface of the laminated piece; the laminated piece comprises a bus bar, the bus bar is provided with an extension section extending out of the laminated piece, the extension section penetrates through the top wall and extends into the cavity, the electric connecting piece is connected with the extension section in the cavity, and the second end of the electric connecting piece penetrates through the first side wall of the cavity and extends out of the frame to be electrically connected with another photovoltaic module. According to the photovoltaic module, rigid electric connection can be formed between the photovoltaic modules by using the rigid electric connecting pieces, so that the impact resistance of the photovoltaic module is improved, and the photovoltaic module is suitable for offshore photovoltaic projects.

Description

Technical Field

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

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] As a new energy utilization and resource development model, offshore photovoltaics offer high power generation and minimal land occupation. However, they face complex and harsh operating environments, such as strong winds and typhoons in southern China. This places higher demands on the reliability of photovoltaic modules. Utility Model Content

[0004] The purpose of the utility model is to provide a photovoltaic module and a photovoltaic module array to solve the technical problem of low reliability of photovoltaic modules.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a photovoltaic module comprising a laminate, a frame, and a rigid electrical connector, wherein the frame comprises a support portion having a cavity, wherein a top wall of the cavity is supported on an edge portion of a back surface of the laminate;

[0007] The laminate includes a bus bar, which has an extension section extending out of the laminate. The extension section extends through the top wall into the cavity. The electrical connector is connected to the extension section in the cavity. The second end of the electrical connector extends through the first side wall of the cavity and extends out of the frame.

[0008] According to at least one embodiment of the present invention, the frame is an electrically insulating frame; or,

[0009] The extension section and the electrical connector are electrically isolated from the frame respectively.

[0010] According to at least one embodiment of the present invention, the second end of the electrical connector has a mortise and tenon structure.

[0011] According to at least one embodiment of the present invention, a mortise and tenon is formed at a portion of the electrical connector close to the second end, and a tenon is formed at the second end of the electrical connector to match the mortise and tenon.

[0012] According to at least one embodiment of the present invention, the first end of the electrical connector is further connected to a fixing member, the fixing member has a first end surface facing the electrical connector, and the orthographic projection of the electrical connector on the first end surface is located within the first end surface;

[0013] The first end surface is electrically connected to or electrically insulated from the electrical connector.

[0014] According to at least one embodiment of the present invention, the extension section has a through hole, the extension section is sleeved on the electrical connector through the through hole, and is fixed between the first side wall and the fixing member, and the first end face is electrically connected to the electrical connector.

[0015] According to at least one embodiment of the present invention, the cavity further has a second side wall opposite to the first side wall, and the second side wall has an opening communicating with the cavity;

[0016] One end of the fixing member facing away from the electrical connector is fixed in the opening.

[0017] According to at least one embodiment of the present invention, a groove is formed on a second end surface of the fixing member facing away from the electrical connector.

[0018] According to at least one embodiment of the present invention, the frame further includes a third side wall opposite to the side of the laminate, and the third side wall is further provided with a guide structure, which protrudes from the inner wall surface of the third side wall.

[0019] The guide structure includes a guide groove and a guide member located above the guide groove, wherein the guide groove extends from a position opposite to the bus bar in the laminate toward the top wall.

[0020] According to at least one embodiment of the present invention, the bus bar has two extending sections, and the two extending sections are respectively located on two opposite sides of the laminate.

[0021] In a second aspect, the present invention further provides a photovoltaic assembly array, comprising a plurality of photovoltaic assemblies according to the first aspect, wherein two adjacent photovoltaic assemblies are electrically connected via corresponding electrical connectors.

[0022] One or more technical solutions provided in the exemplary embodiments of the present invention can achieve at least one of the following beneficial effects.

[0023] The photovoltaic assembly of the exemplary embodiment of the present invention includes a laminate and a frame. The busbar in the laminate is led out from its side to form an extension section. The extension section passes through the support portion of the frame supporting the laminate and enters the cavity. Specifically, it passes through the top wall of the cavity of the support portion and enters the cavity of the support portion. The first end of the rigid electrical connector is electrically connected to the extension section in the cavity, and the second end of the electrical connector passes through the first side wall of the cavity and extends outside the frame, that is, extends toward the direction of another photovoltaic assembly to be electrically connected to the photovoltaic assembly, thereby forming a rigid electrical connection between the two photovoltaic assemblies through the electrical connector, making the connection of the photovoltaic assembly array more reliable. Compared with the prior art, the electrical connection between the two photovoltaic assemblies requires a junction box set on the photovoltaic assembly, and the current is drawn from the junction box using a flexible cable and an electrical connection plug to form the electrical connection between the two photovoltaic assemblies. The photovoltaic assembly of the exemplary embodiment of the present invention can use a rigid electrical connector to form a rigid connection between the photovoltaic assemblies, thereby improving the impact resistance. It is particularly suitable for offshore photovoltaic projects with harsh service environments.

[0024] Furthermore, compared to conventional photovoltaic modules, which typically use three junction boxes to form electrical connections with busbars, the two junction boxes on either side of the three junction boxes use cables and electrical connectors to draw current, while the junction box in the middle is used to protect and connect the circuits, eliminating the need for cables and electrical connectors to draw current. Consequently, the junction boxes on either side are larger than the middle one. The photovoltaic module of the exemplary embodiment of the present invention eliminates the need for cables and electrical connectors to draw current, allowing for the use of smaller junction boxes. This reduces the production cost of the photovoltaic module and offers significant commercial value for the early stages of offshore photovoltaic construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification.

[0026] Figure 1 is a schematic structural diagram of a laminate according to an embodiment of the present utility model;

[0027] Figure 2 is a schematic cross-sectional structural diagram of a laminate according to an embodiment of the present utility model;

[0028] Figure 3 is a schematic cross-sectional structural diagram of a photovoltaic module array according to an embodiment of the present utility model;

[0029] Figure 4is a schematic cross-sectional structural diagram of a photovoltaic module according to an embodiment of the present utility model;

[0030] Figure 5 yes Figure 4 A magnified view of part A;

[0031] Figure 6 is a schematic top view of the guide structure according to an embodiment of the present utility model;

[0032] Figure 7 is a schematic diagram of the axonometric structure of an electrical connector according to an embodiment of the present utility model;

[0033] Figure 8 is an axonometric structural diagram of a laminate and a junction box according to an embodiment of the present utility model;

[0034] Figure 9 It is a schematic diagram of the axonometric structure of a junction box according to an embodiment of the present utility model.

[0035] Reference numerals:

[0036] 11. Fixing member; 111. First end surface; 112. Second end surface; 112a. Groove; 12. Electrical connector; 121. Tenon; 122. Tenon groove;

[0037] 20, cavity; 21, top wall; 22, second side wall; 221, opening; 231, first side wall; 231a, first hole; 232, third side wall;

[0038] 30. Bus bar; 31. Extension section; 311. Through hole;

[0039] 40. Laminates;

[0040] 50. Guide structure; 51. Guide plate; 52. Guide member;

[0041] 60. Junction box; 61. Pointing portion. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] In the related art, the bus bars in the laminate of the photovoltaic module are electrically connected and circuit protected through three junction boxes. In order to draw out the current of the laminate, it is necessary to connect cables and electrical connection plugs to the two junction boxes on both sides. When multiple photovoltaic modules need to be electrically connected to each other to form a photovoltaic power station, the impact resistance of the above-mentioned cable connection method is limited, the reliability is poor, and it is difficult to adapt to harsh service environments, such as strong winds and waves, typhoons and other environments in offshore photovoltaic power stations.

[0044] In response to the above problems, the photovoltaic module provided by the exemplary embodiment of the present invention extends the bus bar from the laminate, enters the cavity of the support part of the frame, and passes through the rigid electrical connector to the outside of the frame, so as to form a rigid electrical connection with other photovoltaic modules, replacing the method of connecting photovoltaic modules with cables from the junction box to each other, so as to improve the impact resistance of the photovoltaic module.

[0045] Figure 1 is a schematic structural diagram of a laminate according to an embodiment of the present utility model; Figure 2 Schematic diagram of the cross-sectional structure of the laminate according to the embodiment of the present invention. Figure 1 and Figure 2 As shown, in the laminate 40 of the photovoltaic module provided by the exemplary embodiment of the present invention, the bus bar 30 stacked in the middle of the laminate 40 is extended so that it extends from one side of the laminate 40 for conducting current, without having to use cables to conduct current from two junction boxes 60 on both sides that are electrically connected to the bus bar 30.

[0046] Figure 3 is a schematic cross-sectional structural diagram of a photovoltaic module array according to an embodiment of the present utility model; Figure 4 Schematic diagram of the cross-sectional structure of a photovoltaic module according to an embodiment of the present invention. Figure 3 and Figure 4 As shown, the photovoltaic module provided by the exemplary embodiment of the present invention includes a laminate 40, a frame and a rigid electrical connector 12, the frame includes a support portion having a cavity 20, and the top wall 21 of the cavity 20 is supported on the edge of the back side of the laminate 40; the laminate 40 includes a bus bar 30, the bus bar 30 has an extension section 31 extending out of the laminate 40, the extension section 31 passes through the top wall 21 and extends into the cavity 20, the electrical connector 12 is connected to the extension section 31 in the cavity 20, and the second end passes through the first side wall 231 of the cavity 20 and extends out of the frame.

[0047] In practical applications, the frame of the photovoltaic module can adopt the frame type in the prior art. For example, the top wall 21 of the cavity 20, the third side wall 232, and the clamping portion (also called the A surface) connected to the top end of the third side wall 232 together form a "C"-shaped structure. When the laminate 40 is snapped into the accommodating cavity of the "C"-shaped structure, the "C"-shaped structure wraps around the circumferential edge portion of the laminate 40, which can play a role in sealing and protecting the laminate 40. The support portion provides the necessary mechanical support for the photovoltaic module, maintaining the stability and integrity of the photovoltaic module. Specifically, the support portion is formed by the first side wall 231, the top wall 21, the second side wall 22, and the corresponding bottom wall. The support portion has a cavity 20 surrounded by the first side wall 231, the top wall 21, the second side wall 22, and the bottom wall. Among them, the first side wall 231 and the third side wall 232 together form the side surface of the frame (also called the B surface).

[0048] A second hole is provided in the top wall 21 of the support portion, that is, the cavity 20, to penetrate the accommodating cavity of the "C"-shaped structure and the cavity 20. A first hole 231a is provided in the first side wall 231 of the cavity 20 to penetrate the cavity 20 and the external environment of the side surface of the frame. When the laminate 40 is snapped into the accommodating cavity of the "C"-shaped structure, the extended segment 31 of the bus bar 30 extending from the laminate 40 enters the cavity 20 through the second hole. In the cavity 20, an electrical connection is formed between the first end or the middle portion of the electrical connector 12 and the extended segment 31. The second end of the rigid electrical connector 12 extends out of the external environment of the side surface of the frame through the first hole 231a. The second end of the electrical connector 12 can form a rigid electrical connection with the electrical connector 12 of another photovoltaic module. Compared with the cable electrical connection between two photovoltaic modules in the prior art, the rigid electrical connector 12 has high connection reliability and can withstand the impact of harsh environments.

[0049] Exemplarily, the electrical connector 12 and the extended segment 31 can be welded to form a good electrical conduction effect; the electrical connector 12 can be fixed in the first hole 231a of the first side wall 231 by an interference fit method.

[0050] It should be understood that the frame of the photovoltaic module can be made of metal. In order to achieve electrical isolation between the electrical connector 12, the extended segment 31 and the frame, an insulating layer can be coated on the contact portions between the electrical connector 12 and the frame and between the extended segment 31 and the frame. Insulating sleeves can also be provided in the first hole 231a and the second hole to achieve electrical isolation from the frame. At the same time, the insulating sleeves have a certain elasticity and can also play a certain role in sealing and waterproofing.

[0051] In another optional embodiment, the frame can be made of an electrically insulating material, such as plastic, glass fiber reinforced composite material, etc. This embodiment does not require insulation treatment for the electrical connector 12 and the extension section 31, and has better corrosion resistance and lower production cost than a metal frame.

[0052] Taking into account the impact resistance of the connection between the two electrical connectors 12 of the two photovoltaic components, the second end of the electrical connector 12 of the exemplary embodiment of the utility model has a mortise and tenon structure. Through the mutual cooperation of the mortise and tenon structures of the two electrical connectors 12, and the electrical connector 12 can be made of conductive metal material, not only an effective electrical connection is formed, but also a rigid physical connection can be formed.

[0053] For example, the electrical connectors 12 of two photovoltaic modules are consistent, such as Figure 7 As shown, Figure 7 It is a schematic diagram of the axonometric structure of the electrical connector according to the embodiment of the present utility model. The electrical connector 12 is a circular rod, and a mortise 122 is provided at the portion near the second end thereof, and the second end of the electrical connector 12 forms a tenon 121 that matches the mortise 122. When two electrical connectors 12 are connected, the tenon 121 of one electrical connector 12 is embedded in the mortise 122 of the other electrical connector 12 to form a mortise and tenon connection structure that fits together. On the basis of forming an electrical connection, the impact resistance is also strong, and it is also easy to disassemble, which facilitates the maintenance of the photovoltaic module. Furthermore, when the electrical connectors 12 of each photovoltaic module are consistent, standardized production can be carried out to reduce production costs.

[0054] In another optional embodiment, the second ends of the two electrical connectors 12 use a mortise and tenon structure with a wedge-nail tenon. The wedge-nail tenon is to divide the end of a circular rod into two tenons 121. The two tenons 121 are overlapped in an inverted manner and fit together. A tongue-shaped protrusion can also extend from the end of the tenon 121, which is embedded in the groove on the bottom end face of the other tenon 121, preventing it from moving up and down. Then, a square hole is opened in the middle of the overlap, and a wedge with a square cross-section is inserted to prevent it from moving left and right, thereby achieving a tight connection. For example, in addition to circular rods, the electrical connector 12 can also be a rod of other shapes such as square.

[0055] The electrical connector 12 in the photovoltaic assembly provided by the exemplary embodiment of the present invention can further enhance its impact resistance by providing a fixing member 11 at a first end of the electrical connector 12 .

[0056] For example, Figure 3 and Figure 7As shown, the fixing member 11 has a first end face 111 facing the electrical connector 12, and the orthographic projection of the electrical connector 12 on the first end face 111 is located within the first end face 111; the extension section 31 is attached to the first end face 111 of the fixing member 11, and the first end face 111 is electrically conductive or electrically insulated from the electrical connector 12.

[0057] When the electrical connector 12 is circular, the fixing member 11 can also be circular, and the diameter of the electrical connector 12 is smaller than the diameter of the fixing member 11, and the two form a stepped shaft. The electrical connector 12 is adapted to the first hole 231a, and the size of the fixing member 11 is larger than the first hole 231a, so that the fixing member 11 can prevent the electrical connector 12 from escaping from the first side wall 231 in the cavity 20, thereby enhancing the impact resistance. On the other hand, the fixing member 11 can be integrally formed with the electrical connector 12 and both are made of metal. The two can be electrically conductive, and the extension section 31 can be attached to the first end face 111 of the fixing member 11 while forming an electrical connection with the electrical connector 12, for example, by welding the extension section 31 of the busbar 30 to make large-area electrical contact with the electrical connector 12 (the first end face 111 of the fixing member 11), thereby reducing resistance and being more impact-resistant.

[0058] Exemplarily, the fixing part 11 may also be made of plastic material and electrically insulated from the electrical connector 12 ; or the fixing part 11 may be made of plastic material and a metal layer may be plated or attached to the first end face 111 to form electrical conduction with the electrical connector 12 .

[0059] In some embodiments, as Figure 3 and Figure 4 As shown, the extension section 31 has a through hole 311 , and the extension section 31 is sleeved on the electrical connector 12 through the through hole 311 and fixed between the first side wall 231 and the fixing member 11 .

[0060] Because the extension section 31 extends downwardly into the cavity 20 along the inner surface of the third side wall 232 and the inner surface of the first side wall 231, the extension section 31 can be sleeved onto the electrical connector 12 and clamped between the inner surface of the first side wall 231 and the first end surface 111 of the fixing member 11 via the fixing member 11. In this embodiment, there is no need to weld the extension section 31 to the fixing member 11. By clamping the fixing member 11 and the first side wall 231, the extension section 31 can be attached to the first end surface 111 of the fixing member 11, thereby forming a reliable electrical connection with the electrical connector 12, thus saving manufacturing process.

[0061] In some embodiments, as Figure 4 As shown, the cavity 20 further has a second side wall 22 opposite to the first side wall 231, and the second side wall 22 has an opening 221 communicating with the cavity 20. Figure 3As shown, one end of the fixing member 11 facing away from the electrical connector 12 is fixed in the opening 221 .

[0062] The opening 221 coincides with the central axis of the first hole 231a. The fixing member 11 can be secured in the opening 221 by an interference fit. For example, the fixing member 11 can be coated with an insulating layer, an insulating sleeve, or a waterproof sealing material. When the fixing member 11 is secured in the opening 221, it not only strengthens the fixation between the electrical connector 12 and the support portion, but also blocks the opening 221 to provide a sealing effect. Furthermore, the opening 221 in the second side wall 22 facilitates assembly and maintenance of the fixing member 11, the electrical connector 12, and the extension section 31.

[0063] like Figure 7 As shown, a groove 112a is formed on the second end face 112 of the fixing member 11 facing away from the electrical connector 12. For example, because the opening 221 allows the second end face 112 of the fixing member 11 facing away from the electrical connector 12 to be exposed, the groove 112a can be a slot or a cross slot, etc. Therefore, the circular fixing member 11 can be rotated with a corresponding screwdriver to drive the mortise and tenon structure of the electrical connector 12 to rotate, and the mortise and tenon structures of the respective electrical connectors 12 of the two photovoltaic modules can be conveniently engaged together. For example, an insulating heat shrink tubing can be used to waterproof the exposed parts of the two connected electrical connectors 12.

[0064] Figure 5 yes Figure 4 A magnified view of part A; Figure 6 FIG. 5 is a schematic diagram of a top view of the guide structure 50 according to an embodiment of the present invention. Figure 5 and Figure 6 As shown, the frame also includes a third side wall 232 opposite to the side of the photovoltaic laminate 40, and a guide structure 50 is also provided on the third side wall 232. The guide structure 50 protrudes from the inner wall surface of the third side wall 232. The guide structure 50 includes a guide groove and a guide member 52 located above the guide groove. The guide groove extends from a position opposite to the bus bar 30 in the laminate 40 to the top wall 21.

[0065] In practice, the guide groove is formed by two guide plates 51 disposed on the inner surface of the third side wall 232, spaced apart from each other. A guide groove extending from top to bottom is formed between the two guide plates 51. The guide member 52 is disposed on the inner surface of the third side wall 232, above the guide groove and higher than the busbar 30. For example, the plane of the guide member 52 facing the guide groove can be a sloped or curved surface, extending from top to bottom in a direction away from the side surface of the laminate 40.

[0066] When the laminate 40 is snapped into the receiving cavity of the "U"-shaped structure, the guiding structure 50 formed by the guiding member 52 and the guiding groove can cause the extending section 31 extending from the laminate 40 to extend in the direction of the top wall 21 of the cavity 20 when it abuts against the third side wall 232, penetrate through the second hole in the top wall 21 and enter the cavity 20. During the process of framing the laminate 40, the guiding structure 50 can enable the extending section 31 of the bus bar 30 to naturally extend into the cavity 20 without manual intervention, improving the production efficiency, saving labor, and facilitating automated production.

[0067] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation of the present invention.

[0068] Exemplarily, the guiding structure 50 can be integrally formed with the frame during the production of the frame, or can be fixed on the inner wall surface of the third side wall 232 by welding or bonding.

[0069] Considering the waterproof sealing effect of the frame on the laminate 40, a sealing rubber ring can be provided in the first hole 231a of the first side wall 231 to prevent water vapor from entering the cavity 20 and then entering the laminate 40 through the second hole in the top wall 21.

[0070] Considering that in a photovoltaic module array, the photovoltaic module in the middle needs to be connected to the adjacent two photovoltaic modules respectively, and the bus bar 30 can extend out of the laminate 40 at both ends of the laminate 40. Specifically, the bus bar 30 has two extending sections 31, and the two extending sections 31 are respectively located on the opposite sides of the laminate 40. That is, the frames on the opposite sides of the laminate 40 also have the same structure, so that the two extending sections 31 are rigidly electrically connected to the electrical connectors 12 on the corresponding other photovoltaic module through the electrical connectors 12, and the frames on the remaining two sides of the laminate 40 can use the frames in the prior art.

[0071] In the photovoltaic module array, in the photovoltaic module at the edge, the bus bar 30 in the laminate 40 can extend out on one side to form an extending section 31, and there is no need to extend out on the other side to form an extending section 31, and the current is led out through a cable in the junction box 60 near the other side.

[0072] Figure 8 It is an isometric structural schematic diagram of the laminate 40 and the junction box 60 according to an embodiment of the present invention; Figure 9: is a schematic diagram of the axonometric structure of the junction box 60 according to the embodiment of the present utility model. Figure 8 and Figure 9 As shown, in the photovoltaic assembly of the exemplary embodiment of the present invention, the three junction boxes 60 are consistent in shape and size, and a pointing portion 61 is provided on the outer wall of each junction box 60. Since the bypass diode in the junction box 60 has the function of protecting the photovoltaic cell from hot spot effect or reverse current, it requires the correct connection of the positive polarity bus bar 30 and the negative polarity bus bar 30. Therefore, when the three junction boxes 60 all have the pointing portion 61, it can prevent the installer from connecting the wrong electrodes, which has a fool-proof effect.

[0073] Compared with the photovoltaic components in the prior art, cables are required to be used in the junction boxes 60 on both sides of the three junction boxes 60 to conduct the current, and the volume of the junction boxes 60 on both sides is larger than that of the middle junction box 60. The photovoltaic component of the exemplary embodiment of the present invention conducts the current through the extension section 31 of the bus bar 30 and the electrical connector 12. Therefore, all three junction boxes 60 can use smaller junction boxes 60, which reduces the material cost of the junction boxes 60. At the same time, potting glue and silicone are required in the junction boxes 60, which also reduces the use of potting glue and silicone, thereby reducing the overall cost of the junction boxes 60.

[0074] An exemplary embodiment of the present invention further provides a photovoltaic assembly array, comprising a plurality of photovoltaic assemblies according to the above embodiments, wherein two adjacent photovoltaic assemblies are electrically connected via corresponding electrical connectors.

[0075] The technical advantages of the above-mentioned photovoltaic module array over the prior art are the same as the advantages of the above-mentioned photovoltaic modules, which will not be repeated here.

[0076] Those skilled in the art will appreciate that the above embodiments are merely intended to clearly illustrate the present invention and are not intended to limit the scope of the present invention. Other variations or modifications may be made based on the above disclosure, and such variations or modifications are still within the scope of the present invention.

Claims

1. A photovoltaic module, characterized in that: The invention comprises a laminate, a frame and a rigid electrical connector, wherein the frame comprises a support portion having a cavity, and the top wall of the cavity is supported on the edge of the back side of the laminate; The laminate includes a bus bar, which has an extension section extending out of the laminate. The extension section extends through the top wall into the cavity. The electrical connector is connected to the extension section in the cavity. The second end of the electrical connector extends through the first side wall of the cavity and extends out of the frame.

2. The photovoltaic module according to claim 1, characterized in that The frame is an electrically insulating frame; or, The extension section and the electrical connector are electrically isolated from the frame respectively.

3. The photovoltaic module according to claim 1, characterized in that The second end of the electrical connector has a mortise and tenon structure.

4. The photovoltaic module according to claim 3, characterized in that A mortise and tenon groove is formed at a portion of the electrical connector close to the second end, and a tenon matching the mortise and tenon groove is formed at the second end of the electrical connector.

5. The photovoltaic module according to claim 1, characterized in that The first end of the electrical connector is further connected to a fixing member, the fixing member having a first end surface facing the electrical connector, and an orthographic projection of the electrical connector on the first end surface is located within the first end surface; The first end surface is electrically connected to or electrically insulated from the electrical connector.

6. The photovoltaic module according to claim 5, characterized in that: The extension section has a through hole, the extension section is sleeved on the electrical connector through the through hole, and is fixed between the first side wall and the fixing member, and the first end surface is electrically connected to the electrical connector.

7. The photovoltaic module according to claim 5, characterized in that The cavity further comprises a second side wall opposite to the first side wall, the second side wall comprising an opening communicating with the cavity; One end of the fixing member facing away from the electrical connector is fixed in the opening.

8. The photovoltaic module according to claim 5, characterized in that A groove is formed on a second end surface of the fixing member facing away from the electrical connector.

9. The photovoltaic module according to any one of claims 1 to 8, characterized in that: The frame further includes a third side wall opposite to the side of the laminate, and the third side wall is further provided with a guide structure, and the guide structure protrudes from the inner wall surface of the third side wall; The guide structure includes a guide groove and a guide member located above the guide groove, wherein the guide groove extends from a position opposite to the bus bar in the laminate toward the top wall.

10. A photovoltaic module array, characterized in that: The photovoltaic modules comprise a plurality of photovoltaic modules according to any one of claims 1 to 9, wherein two adjacent photovoltaic modules are electrically connected via the corresponding electrical connectors.

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