Photovoltaic module and photovoltaic system
By setting a busbar on the back edge of the solar cell in the photovoltaic module and welding it to the solar cell with a protrusion, the problems of increased thickness and microcracks in traditional photovoltaic modules are solved, achieving higher power generation efficiency and structural compactness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RISEN ENERGY CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional photovoltaic modules place the busbars on the back of the cells, which increases the overall thickness of the photovoltaic module and poses a risk of microcracks in the cells.
A busbar is installed on the back edge of the solar cell, and the protrusion is used to weld it to the front and back strips of the solar cell. The insulation is achieved by the separator to avoid bending of the strips, thus ensuring the utilization of the front space of the solar cell and a compact structure.
This improved the power output of photovoltaic modules, reduced the overall thickness, avoided the risk of microcracks in the cells, and enhanced structural stability and safety.
Smart Images
Figure CN224419182U_ABST
Abstract
Description
Technical Field
[0001] This patent relates to the field of photovoltaic modules, and more particularly to a photovoltaic module and a photovoltaic system. Background Technology
[0002] With the continuous development of photovoltaic power generation technology, the application range of photovoltaic modules is becoming increasingly wide. Traditional photovoltaic modules typically consist of solar cells and busbars, with the busbars arranged along the length of the module in the middle and on opposite sides of the cell string. Moreover, conventional photovoltaic modules place the busbars on the front of the solar cells, but this occupies the light-receiving area of the solar cells, affecting the overall photoelectric conversion efficiency of the photovoltaic module.
[0003] Related technologies also include placing the busbars on the back of the solar cells, such as the photovoltaic module disclosed in patent CN 119069561 A. Figure 1 As shown, the core of its design lies in placing the busbar 30 on one side of the back of the solar cell 10, and ensuring that at least a portion of the projection of the busbar 30 is within the projection range of the solar cell strings A and B in the projection along the thickness direction of the photovoltaic module. The solder ribbon 20 has a connecting section and a bending section. The connecting section is connected to the solar cell 10, and the bending section is bent towards the back of the solar cell and connected to the busbar 30. The insulating sheet 14 isolates the busbar 30 from the back of the solar cell strings A and B. However, the production of photovoltaic modules with this structure requires bending the solder ribbon, which is complex and difficult. Furthermore, the bending of the busbar 30 increases the thickness of the solder ribbon 20 between it and the solar cell 10. In addition, the presence of the solder ribbon between the busbar and the surface of the solar cell means that the busbar and the solar cell are not completely bonded, posing a risk of microcracks. Moreover, when the solder ribbon at the edge of the solar cell is bent, there is point contact between the solder ribbon and the edge of the solar cell during the lamination process, which is prone to microcracks.
[0004] In view of this, there is an urgent need in the market for a new type of photovoltaic module to solve the problem that bending the busbars and placing them on the back of the cells in related technologies increases the overall thickness of the photovoltaic module and makes the cells prone to microcracks. Utility Model Content
[0005] This disclosure provides a photovoltaic module and a photovoltaic system. In order to solve the problem in the related art that bending the busbars on the back of the solar cell in a photovoltaic module indirectly increases the overall thickness of the solar cell and makes the solar cell prone to microcracks.
[0006] The photovoltaic module provided in this disclosure includes solar cells, a busbar, and an isolation component;
[0007] The front and back sides of the battery cell are respectively provided with solder strips;
[0008] The busbar is located at the back edge of the battery cell;
[0009] The separator is disposed between the battery cell and the busbar, and is used to insulate and isolate the battery cell from the busbar;
[0010] The busbar has a protrusion that protrudes along the thickness direction of the battery cell;
[0011] The protrusion has a top surface flush with the front of the battery cell and a side surface opposite to the side of the battery cell.
[0012] The solder strip located on the front side of the battery cell can be welded to the top surface, and the solder strip located on the back side of the battery cell can pass through the separator and be welded to the side.
[0013] In one possible embodiment, the busbar also has an end face facing the back of the battery cell;
[0014] The solder strip located on the back of the battery cell can also pass through the separator and be welded at least partially to the end face.
[0015] In one embodiment, the protrusion is located at the middle of the busbar along the width direction of the busbar;
[0016] Along the width direction of the busbar, the protrusion has two oppositely arranged side surfaces that are perpendicular to the width direction.
[0017] The top surface connection is located between the two side surfaces and is perpendicularly connected to each of the two side surfaces.
[0018] In one possible embodiment, the protrusion is disposed at one end of the busbar along the width direction of the busbar;
[0019] Along the width direction of the busbar, the protrusion has a side surface that is perpendicular to the width direction;
[0020] One side of the top surface is perpendicularly connected to the side surface, and the other side is perpendicularly connected to the end surface.
[0021] In one embodiment, the insulating member includes an insulating insulating layer and an adhesive layer distributed on both sides of the insulating insulating layer;
[0022] Furthermore, the adhesive layer is bonded and fixed to the battery cell and the busbar respectively.
[0023] In one embodiment, the battery cell is further provided with a passivation structure at the edge where the busbar is disposed;
[0024] The passivation structure is used to insulate and isolate the surface at the edge of the battery cell.
[0025] In one embodiment, the busbar further includes a connecting portion located on the side of the protrusion along its own width direction;
[0026] The connecting part is used to connect with the insulating member, and the surface of the connecting part facing the back of the battery cell is the end face;
[0027] The thickness of the connecting portion does not exceed half the thickness of the protrusion.
[0028] In one embodiment, the width of the isolator is greater than or equal to the width of the connection portion along the width direction of the busbar, so that the end face can be completely insulated and isolated by the isolator.
[0029] In one embodiment, the protrusion heights of the protrusions are not all the same along the length of the busbar.
[0030] In addition, this disclosure also provides a photovoltaic system including the photovoltaic module described above.
[0031] The technical solution provided in this disclosure has the following advantages compared with related technologies:
[0032] The photovoltaic module provided in this embodiment has an isolator and a busbar stacked sequentially at the edge of the back side of the cell. The top surface of the protrusion in the busbar is flush with the front side of the cell and can be connected and fixed to the solder strip on the front side of the cell. The side of the protrusion can be welded and fixed to the solder strip on the back side of the cell. In this way, the solder strip on the front side of the cell can be electrically connected to the solder strip on the back side of the cell. On the one hand, the busbars installed on the back of the solar cells make full use of the space on the back of the cells without occupying the space on the front of the cells, ensuring the maximum effective power generation area of the cells and significantly improving the power output of the photovoltaic modules. On the other hand, the busbars are only separated from the solar cells by a spacer, making the overall thickness of the photovoltaic modules thinner and the structure more compact. Furthermore, the welding strips on the front of the solar cells are welded to the top surface of the protrusions, and the welding strips on the back of the solar cells are welded to the sides of the protrusions, eliminating the need to bend the busbars or welding strips, effectively avoiding the risk of microcracks in the solar cells. Moreover, the spacer can be glued and fixed to the solar cells and busbars respectively to prevent short circuits and leakage, while also fixing the busbars and enhancing the overall structural stability.
[0033] Furthermore, the photovoltaic system provided in this embodiment includes the photovoltaic modules described above and can achieve all the beneficial effects of the photovoltaic modules described above, which will not be repeated here.
[0034] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0035] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:
[0036] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
[0037] Figure 1 A schematic diagram of a busbar placed on a battery cell in the prior art is shown;
[0038] Figure 2 A structural diagram of a photovoltaic module provided in an embodiment of this disclosure is shown.
[0039] Figure 3 It shows Figure 2 Schematic diagram of the connection between the busbar and the solder strip;
[0040] Figure 4 Another structural diagram of the photovoltaic module provided in this disclosure embodiment is shown;
[0041] Figure 5 A vertical cross-sectional view of a photovoltaic module provided in a disclosed embodiment is shown;
[0042] Figure 6 A further structural diagram of the photovoltaic module provided in the embodiments of this disclosure is shown;
[0043] Figure 7 It shows Figure 6 A schematic diagram of the connection between the busbar and the solder strip.
[0044] The following are the labels in the diagram: 1. Battery cell; 11. Welding strip; 2. Separator; 3. Busbar; 31. Protrusion; 311. Top surface; 312. Side surface; 313. End face; 32. Connector. Detailed Implementation
[0045] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0046] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. The accompanying drawings are provided to facilitate the illustration of the structure of the technical solution. Figure 2 , Figure 4 and Figure 6 The image shown is a structural view of the back of battery cell 1, while... Figure 5 The corresponding image shown is a vertical cross-sectional view of battery cell 1 from the front to the back.
[0047] Combination Figure 2 and Figure 3 As shown, this embodiment of the present disclosure provides a photovoltaic module, which includes a solar cell 1, a busbar 3, and an insulating member 2. The solar cell 1 has solder ribbons 11 on its front and back sides, allowing the solder ribbons 11 to contact the grid lines in the solar cell 1 and transmit the current collected on the grid lines. The busbar 3 is located at the edge of the back side of the solar cell 1. The insulating member 2 is located between the solar cell 1 and the busbar 3 to insulate and isolate the solar cell 1 from the busbar 3. The busbar 3 has a protrusion 31 extending along the thickness direction of the solar cell 1, and the protrusion 31 has a top surface 311 flush with the front side of the solar cell 1 and a side surface 312 opposite to the side of the solar cell 1. The solder ribbons 11 on the front side of the solar cell 1 can be welded to the top surface 311, and the solder ribbons 11 on the back side of the solar cell 1 can pass through the insulating member 2 and be welded to the side surface 312.
[0048] During the assembly and manufacturing of this photovoltaic module, multiple solar cells 1 are first precisely wired into a solar cell string using solder ribbons 11, ensuring a reasonable layout of the solar cells 1 within the string. Then, an isolation component 2 is attached to the edge of the back of the solar cell 1 using an adhesive method. Next, a busbar 3 is fixed to the isolation component 2, allowing the busbar 3 to be insulated and fixed to the edge of the solar cell 1. It is also ensured that the top surface 311 of the protrusion 31 in the busbar 3 is flush with the front of the solar cell 1. Finally, the solder ribbons 11 on the front of the solar cell 1 are welded to the top surface 311 of the protrusion 31, and the solder ribbons 11 on the back of the solar cell 1 are welded to the side surface 312 of the protrusion 31. This completes the assembly process of the photovoltaic module and ensures that the busbar 3 is insulated and fixed to the back of the solar cell 1. The busbar 3 and the solar cell 1 are separated only by an isolation component 2, resulting in a thinner overall thickness of the photovoltaic module and effectively avoiding the risk of microcracks in the solar cells.
[0049] In summary, the photovoltaic module provided in this disclosure, compared with the photovoltaic module in the related art that sets the busbars on the back of the cells, has at least the following disadvantages:
[0050] 1. The busbar 3 installed on the back of the solar cell 1 makes full use of the space on the back of the solar cell 1 without occupying the front space of the solar cell 1, ensuring the maximum effective power generation area of the solar cell 1 and significantly improving the power output of the photovoltaic module.
[0051] 2. The busbar 3 and the solar cell 1 are separated by only one separator 2, which eliminates at least the thickness of one solder strip 11, thus optimizing the thickness structure of the photovoltaic module and making the overall thickness of the photovoltaic module thinner and the structure more compact.
[0052] 3. The isolation component 2 can be attached and fixed to the battery cell 1 and the busbar 3 respectively to prevent short circuits and leakage. At the same time, it can also fix the busbar 3 and enhance the overall structural stability.
[0053] 4. The way the protrusion 31 in the busbar 3 is set up cleverly achieves the overlap of the welding strip 11 on the front and back of the battery cell 1. There is no need to bend the welding strip 11, which simplifies the manufacturing process, reduces the production difficulty and cost, and also effectively avoids the risk of microcracks in the battery cell 1.
[0054] In one embodiment, the busbar 3 also has an end face 313 facing the back of the battery cell 1; the solder strip 11 located on the back of the battery cell 1 can also pass through the separator 2 and be welded at least partially to the end face 313.
[0055] Specifically, in combination Figure 3 In further detail, the busbar 3 also has an end face 313 facing the back of the battery cell 1. The end face 313 can be specifically, but not limited to, a plane located on one or both sides of the protrusion 31. After passing through the separator 2, the solder strip 11 on the back of the battery cell 1 cannot be electrically connected to the side 312 of the protrusion 31 by butt joint. Instead, it can be further connected to the busbar 3 by being pressed against the end face 313, thereby further ensuring the stability and reliability of the electrical connection between the solder strip 11 on the back of the battery cell 1 and the busbar 3.
[0056] In one embodiment, the protrusion 31 is located in the middle of the busbar 3 along the width direction of the busbar 3; along the width direction of the busbar 3, the protrusion 31 has two oppositely arranged side surfaces 312 that are perpendicular to the width direction; the top surface 311 is located between the two side surfaces 312 and is perpendicularly connected to the two side surfaces 312 respectively.
[0057] Specifically, in combination Figure 3In further detail, the protrusion 31 is specifically positioned in the middle of the busbar 3 along the width direction of the busbar 3. Side surfaces 312 perpendicular to the width direction of the busbar 3 are formed on both sides of the protrusion 31. The top surface 311 of the protrusion 31 is located between the two side surfaces 312 and is perpendicularly connected to them. This busbar 3 can then be positioned between two spaced battery cells 1 to connect the edges of the backplates of the two battery cells 1. The solder strips 11 on the front of the two battery cells 1 can be overlapped and fixed to the top surface 311 of the protrusion 31, and the solder strips 11 on the back of the two battery cells 1 can be abutted and fixed to the side surfaces 312 of the protrusion 31, thus achieving the function of connecting the solder strips 11 on the front and back of the battery cells 1.
[0058] In one embodiment, the protrusion 31 is disposed at the end of the busbar 3 along the width direction of the busbar 3; along the width direction of the busbar 3, the protrusion 31 has a side surface 312 that is perpendicular to the width direction; one side of the top surface 311 is perpendicularly connected to the side surface 312, and the other side is perpendicularly connected to the end surface 313.
[0059] Specifically, in combination Figure 6 and Figure 7 In further detail, the protrusion 31 is specifically positioned at one end of the busbar 3 along the width direction of the busbar 3. One side of the protrusion 31 forms a side surface 312 perpendicular to the width direction of the busbar 3. One side of the top surface 311 of the protrusion 31 is perpendicularly connected to the side surface 312, and the other side is perpendicularly connected to the end face 313. This busbar 3 can then be positioned on the back edge of a single battery cell 1 to connect the front and back solder strips 11 of the single battery cell 1. The solder strips 11 on the front of the battery cell 1 can be overlapped and fixed in the top surface 311 of the protrusion 31, and the solder strips 11 on the back of the battery cell 1 can be abutted and fixed in the side surface 312 of the protrusion 31, thereby achieving an electrical connection between the front and back solder strips 11 of the battery cell 1.
[0060] In addition, it is worth noting that both the solder strip 11 and the busbar 3 can be made of low-temperature materials, such as low-temperature solder, which melts at the contact position during the lamination process to form a tin alloy to achieve electrical contact.
[0061] In one embodiment, the separator 2 includes an insulating separator layer and adhesive layers distributed on both sides of the insulating separator layer; and the adhesive layers are respectively bonded and fixed to the battery cell 1 and the busbar 3.
[0062] Specifically, in combination Figure 4 and Figure 5In further detail, the insulating layer in the separator 2 can be made of a material with excellent insulating properties, such as polyethylene terephthalate (PET), to ensure that the insulating layer can provide reliable electrical insulation; the adhesive layer can be made of high-performance adhesive materials such as polyolefin, to ensure that the separator 2 can be firmly adhered to the battery cell 1 and the busbar 3 through the adhesive layer respectively.
[0063] The specific arrangement of the aforementioned isolation component 2 is simple in structure, can insulate and isolate the battery cell 1 and the busbar 3, and can also improve the installation and connection firmness of the busbar 3 and the battery cell 1.
[0064] In one embodiment, the battery cell 1 is also provided with a passivation structure at the edge where the busbar 3 is located; the passivation structure is used to insulate and isolate the surface of the edge of the battery cell 1.
[0065] Specifically, the solar cell 1 is also provided with a passivation structure at the edge where the busbar 3 is located. This passivation structure forms an insulating passivation structure on the surface of the edge of the solar cell 1, thereby further insulating and isolating the solar cell 1 from the busbar 3. This effectively prevents the solar cell 1 from short-circuiting with the busbar 3 and further improves the safety and reliability of the photovoltaic module.
[0066] In one embodiment, the passivation structure is configured as a passivation film layer formed on the surface of the edge of the battery cell 1 by vapor deposition of an insulating material.
[0067] At the edge of the battery cell 1 where the busbar 3 is located, a passivation film layer is formed by chemical vapor deposition (CVD) of insulating material at the edge of the battery cell 1, thereby effectively isolating the busbar 3 from direct contact between the battery cell 1 and the battery cell 1 at the edge.
[0068] In one embodiment, the passivation structure is configured as a passivation film layer formed by screen printing of an insulating material on the surface of the edge of the battery cell 1;
[0069] Alternatively, screen printing technology can be used at the edge of the busbar 3 on the battery cell 1 to form a passivation film by printing and coating insulating materials such as polyethylene terephthalate (PET) on the edge of the battery cell 1.
[0070] In one embodiment, the busbar 3 further includes a connecting portion 32 located on the side of the protrusion 31 along its own width direction; the connecting portion 32 is used to connect with the separator 2, and the surface of the connecting portion 32 facing the back of the battery cell 1 is an end face 313; the thickness of the connecting portion 32 does not exceed half the thickness of the protrusion 31.
[0071] Specifically, in combination Figure 5To explain in more detail, at this time, the connecting part 32 is only provided on one side of the protrusion 31, and on the back of the battery cell 1, the connecting part 32 and the protrusion 31 are flush. Since the surface of the connecting part 32 facing the back of the battery cell 1 is the end face 313, the busbar 3 can be bonded and fixed to the separator 2 over a large area through the end face 313 in the connecting part 32, ensuring the firmness of the insulating connection between the busbar 3 and the separator 2.
[0072] In addition, the thickness of the connecting part 32 is set to be no more than half the thickness of the protrusion 31. This ensures the strength of the connecting structure of the connecting part 32, and also makes the overall structure after the busbar 3 and the separator 2 on the back of the battery cell 1 are bonded together thinner.
[0073] Of course, the connecting parts 32 can also be symmetrically arranged on the two opposite sides of the protrusion 31, so that the current collector 3 can be bonded to the isolation member 2 on the back of the two battery cells 1 respectively through the two connecting parts 32.
[0074] In one embodiment, the width of the isolator 2 is greater than or equal to the width of the connection portion 32 along the width direction of the busbar 3, so that the end face 313 can be completely insulated and isolated by the isolator 2.
[0075] Specifically, in combination Figure 5 To explain in more detail, the width of the isolator 2 is set to be equal to the width of the connecting part 32. This allows the isolator 2 and the connecting part 32 to be bonded and fixed with equal widths, thus ensuring the firmness and reliability of the insulating connection between the isolator 2 and the connecting part 32.
[0076] Of course, the width of the insulating member 2 can also be set to be slightly larger than the width of the connecting part 32, so as to more fully ensure the insulation performance between the connecting part 32 and the insulating member 2.
[0077] In one embodiment, the passivation structure is configured as a passivation film layer formed by laser etching or annealing to remove surface impurities at the edge of the battery cell 1.
[0078] Alternatively, laser etching or annealing can be used at the edge of the busbar 3 on the battery cell 1 to remove impurities at the edge of the battery cell 1 and form a passivation film layer accordingly, which can also achieve the beneficial effect of enhancing the surface insulation of the edge of the battery cell 1.
[0079] In one embodiment, the protrusion 31 is formed by the busbar 3 through partial stamping or embossing.
[0080] The protrusion 31 can be formed by mechanical processing, stamping or embossing a portion of the busbar 3, and the part of the busbar 3 that is not stamped or embossed can be formed accordingly.
[0081] In one embodiment, the protrusion 31 is formed from a portion of the busbar 3 that has not been chemically etched.
[0082] The protrusion 31 can also be formed by chemical processing, such as chemical etching or electrochemical treatment of the busbar 3, and the part of the busbar 3 that is not chemically etched can be formed accordingly.
[0083] In one embodiment, the protrusion height of the protrusion 31 is not exactly the same along the length direction of the busbar 3.
[0084] Along the length of the busbar 3, the protrusion heights of the protrusions 31 are not all the same. This gives the protrusions 31 regional protrusion heights, so that protrusions 31 with different protrusion heights can be used to overlap according to the different positions of the solder ribbon 11 in the cell 1. This ensures that the solder ribbon 11 can make effective contact with the protrusions 31 before lamination, thereby improving the electrical connection reliability of the photovoltaic module.
[0085] In addition, this disclosure also provides a photovoltaic system including the photovoltaic module described above; the photovoltaic system can be specifically applied to a photovoltaic power station, and the photovoltaic system can also include an energy storage component, wherein the solar cell 1 in the photovoltaic module can be electrically connected to the energy storage component to store the generated electrical energy of the solar cell 1 through the energy storage component.
[0086] In addition, the busbar 3 in the photovoltaic module can be installed between two spaced-apart solar cells 1, and the solder strips 11 in the two solar cells 1 can be electrically connected accordingly.
[0087] The photovoltaic system includes the aforementioned photovoltaic modules and can achieve all the beneficial effects of the aforementioned photovoltaic modules, which will not be elaborated further here.
[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.
[0089] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. A photovoltaic module, characterized in that, include: A battery cell (1), wherein the front and back sides of the battery cell (1) are respectively provided with solder strips (11); A busbar (3) is disposed at the back edge of the battery cell (1); An insulating component (2) is disposed between the battery cell (1) and the busbar (3) to insulate and isolate the battery cell (1) from the busbar (3); The busbar (3) has a protrusion (31) that protrudes along the thickness direction of the battery cell (1); The protrusion (31) has a top surface (311) flush with the front of the battery cell (1) and a side surface (312) opposite to the side of the battery cell (1); The solder strip (11) located on the front side of the battery cell (1) can be welded to the top surface (311), and the solder strip (11) located on the back side of the battery cell (1) can pass through the separator (2) and be welded to the side surface (312).
2. The photovoltaic module according to claim 1, characterized in that, The busbar (3) also has an end face (313) facing the back of the battery cell (1); The solder strip (11) located on the back of the battery cell (1) can also pass through the separator (2) and be welded at least partially to the end face (313).
3. The photovoltaic module according to claim 2, characterized in that, The protrusion (31) is located in the middle of the busbar (3) along the width direction of the busbar (3); Along the width direction of the busbar (3), the protrusion (31) has two oppositely arranged side surfaces (312) that are perpendicular to the width direction. The top surface (311) is located between the two side surfaces (312) and is perpendicularly connected to the two side surfaces (312) respectively.
4. The photovoltaic module according to claim 2, characterized in that, The protrusion (31) is provided at one end of the busbar (3) along the width direction of the busbar (3); Along the width direction of the busbar (3), the protrusion (31) has a side surface (312) that is perpendicular to the width direction; The top surface (311) is perpendicularly connected to the side surface (312) on one side and perpendicularly connected to the end surface (313) on the other side.
5. The photovoltaic module according to claim 1, characterized in that, The insulating element (2) includes an insulating insulating layer and an adhesive layer distributed on both sides of the insulating insulating layer; Furthermore, the adhesive layer is bonded and fixed to the battery cell (1) and the busbar (3) respectively.
6. The photovoltaic module according to claim 1, characterized in that, The battery cell (1) also has a passivation structure at the edge where the busbar (3) is located; The passivation structure is used to insulate the surface at the edge of the battery cell (1).
7. The photovoltaic module according to claim 2, characterized in that, The busbar (3) also includes a connecting portion (32) located on the side of the protrusion (31) along its own width direction; The connecting part (32) is used to connect with the separator (2), and the surface of the connecting part (32) facing the back of the battery cell (1) is the end face (313); The thickness of the connecting portion (32) is no more than half the thickness of the protrusion (31).
8. The photovoltaic module according to claim 7, characterized in that, Along the width direction of the busbar (3), the width of the isolator (2) is greater than or equal to the width of the connection (32) so that the end face (313) can be completely insulated and isolated by the isolator (2).
9. The photovoltaic module according to claim 8, characterized in that, Along the length of the busbar (3), the protrusion height of the protrusion (31) is not exactly the same.
10. A photovoltaic system, characterized in that, The photovoltaic module includes any one of claims 1 to 9.