Solar cell, cell assembly and photovoltaic system

Abstract

The utility model is suitable for the field of photovoltaic technology, and provides a solar cell, a cell assembly and a photovoltaic system. The solar cell comprises a doped region, a first insulating region and a first cell edge in contact with an adjacent cell piece, the first insulating region is located between the first battery edge and the doped region, and electrically isolates the doped region from the adjacent battery piece. According to the utility model, the solar cell is provided with the first insulation region, and the first insulation region is located between the first cell edge and the doped region, so that an electrical isolation effect is achieved, the doped region of the solar cell can be isolated from the adjacent cell pieces, and current leakage of carriers of the solar cell due to contact between the adjacent cell pieces is prevented; the effects of improving the photoelectric conversion efficiency of the whole solar cell module and improving the product yield are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a solar cell, a battery assembly and a photovoltaic system. Background Art

[0002] A solar cell is a device that converts sunlight into electricity using the photoelectric effect. Made primarily of photovoltaic materials (such as silicon), it absorbs photons and excites electrons, generating an electric current. The cell, consisting of a front electrode, a photovoltaic layer, and a back electrode, generates electricity when exposed to sunlight and is widely used in power generation systems and various electronic devices.

[0003] In the prior art, during the preparation of solar cell modules, direct contact between adjacent cells can cause photogenerated carriers to leak at the contact point, leading to serious leakage problems and thus affecting the photoelectric conversion efficiency of the module and the product yield. Utility Model Content

[0004] The utility model provides a solar cell, a cell assembly and a photovoltaic system to solve the technical problem in the prior art that, during the preparation process of the solar cell assembly, direct contact between adjacent cell sheets may cause leakage of photogenerated carriers at the contact point.

[0005] The present invention is implemented as follows: a solar cell, a solar cell assembly, and a photovoltaic system are provided. The solar cell includes a doped region, a first insulating region, and a first cell edge in contact with an adjacent cell; the first insulating region is located between the first cell edge and the doped region, electrically isolating the doped region from the adjacent cell.

[0006] Furthermore, it also includes: a second insulating region and a second battery edge, the second battery edge is arranged opposite to the first battery edge, the second battery edge is located on the side of the solar cell away from the adjacent battery cell, and the second insulating region is located between the second battery edge and the doping region.

[0007] Furthermore, the width of the first insulating region is 0.05 mm to 15 mm.

[0008] Furthermore, the width of the second insulating region is 0.05 mm to 15 mm.

[0009] Furthermore, the first insulating region is a dielectric layer including at least one of silicon oxide, silicon nitride, aluminum oxide, and aluminum oxynitride.

[0010] Furthermore, the second insulating region is a dielectric layer including at least one of silicon oxide, silicon nitride, aluminum oxide, and aluminum oxynitride.

[0011] Furthermore, the surface of the first insulating region is velvet.

[0012] Furthermore, the surface of the second insulating region is velvet.

[0013] An embodiment of the present invention further provides a battery assembly, which includes the solar cell as described above.

[0014] Furthermore, two adjacent solar cells partially overlap; wherein an overlapping area of ​​the two adjacent solar cells partially overlap is smaller than an area of ​​the first insulating region.

[0015] An embodiment of the present invention further provides a photovoltaic system, which includes the battery assembly described above.

[0016] The present invention is applicable to the field of photovoltaic technology and provides a solar cell, a battery assembly, and a photovoltaic system. The solar cell includes: a doped region, a first insulating region, and a first battery edge in contact with an adjacent battery cell; the first insulating region is located between the first battery edge and the doped region, electrically isolating the doped region from the adjacent battery cell. The present invention provides a first insulating region on the solar cell, and the first insulating region is located between the first battery edge and the doped region, thereby performing an electrical isolation function. This can isolate the doped region of the solar cell from the adjacent battery cell, preventing the carriers of the solar cell from leaking through the contact between the adjacent battery cells, thereby improving the photoelectric conversion efficiency of the entire solar cell assembly and increasing the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the structure of the solar cell provided by the embodiment of the utility model

[0019] Figure 2 A schematic diagram of an application scenario of a solar cell provided by an embodiment of the present utility model;

[0020] Figure 3 A schematic diagram of another application scenario of the solar cell provided by an embodiment of the present utility model;

[0021] Figure 4 A schematic diagram of another application scenario of the solar cell provided by an embodiment of the present utility model;

[0022] Figure 5 for Figure 2 A schematic cross-sectional structure diagram of a solar cell shown;

[0023] Figure 6 for Figure 3 A schematic cross-sectional structure diagram of a solar cell shown;

[0024] Figure 7 for Figure 2 Another schematic cross-sectional structure diagram of a solar cell shown;

[0025] Figure 8 for Figure 2 Another schematic cross-sectional structure diagram of a solar cell shown;

[0026] Figure 9 for Figure 3 Another schematic cross-sectional structure diagram of a solar cell shown;

[0027] Figure 10 for Figure 3 Another cross-sectional schematic diagram of a solar cell shown

[0028] Figure 11 A schematic diagram of an application scenario in which adjacent cells are provided on both sides of a solar cell provided by an embodiment of the present utility model;

[0029] Figure 12 A schematic diagram of another application scenario in which adjacent cells are provided on both sides of the solar cell provided by an embodiment of the present utility model;

[0030] Figure 13 A schematic diagram of another application scenario in which adjacent cells are provided on both sides of the solar cell provided by an embodiment of the present utility model;

[0031] Figure 14 A schematic diagram of an application scenario of a stack of solar cells and adjacent cells provided by an embodiment of the present invention;

[0032] Figure 15 A schematic diagram of another application scenario of the stacking arrangement of solar cells and adjacent cells provided by an embodiment of the present utility model;

[0033] Figure 16 A schematic diagram of another application scenario of the stacking arrangement of solar cells and adjacent cells provided by an embodiment of the present invention;

[0034] Figure 17 A schematic diagram of the module structure of a photovoltaic system provided by an embodiment of the present utility model;

[0035] Figure 18 A schematic diagram of the module structure of a battery assembly provided in an embodiment of the present utility model;

[0036] Figure 19 A schematic cross-sectional view of a flatly arranged solar cell in a battery assembly provided by an embodiment of the present utility model;

[0037] Figure 20 This is another schematic cross-sectional structure diagram of a flat arrangement of solar cells in a battery assembly provided by an embodiment of the present utility model;

[0038] Figure 21 This is another schematic cross-sectional structure diagram of a flat arrangement of solar cells in a battery assembly provided by an embodiment of the present utility model;

[0039] Figure 22 A schematic cross-sectional view of a solar cell stack arrangement in a battery assembly according to an embodiment of the present invention;

[0040] Figure 23 This is another cross-sectional structural diagram of the solar cell stack arrangement in the battery assembly provided by an embodiment of the present utility model.

[0041] Explanation of the main component symbols: 1000, photovoltaic system; 1001, battery assembly; 100, solar cell; 10, first insulating region; 20, doping region; 30, first battery edge; 40, second insulating region; 50, second battery edge; 200, adjacent battery cell; 60, passivation layer; 70, tunneling layer; 80, gate line; 90, substrate. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention. In addition, 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 description of the present invention, it should be understood that the terms "length", "width", "up", "down", "top", "bottom", "horizontal", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0044] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0045] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the application of other processes and / or the use scenarios of other materials.

[0048] See also Figure 17 and Figure 18The photovoltaic system 1000 in the embodiment of the present invention may include a battery assembly 1001 in the embodiment of the present invention. The battery assembly 1001 in the embodiment of the present invention may include multiple battery strings, and the battery string may include multiple solar cells 100 in the embodiment of the present invention. In the present invention, the multiple solar cells 100 in the battery assembly 1001 are sequentially connected in series via welding ribbons to form a battery string. The individual battery strings in the battery assembly 1001 can be connected in series, in parallel, or in a combination of series and parallel to achieve current bus output. For example, the battery strings can be connected via bus bars.

[0049] It should be noted that the drawings provided in this application are schematic diagrams, and some elements are not shown. This is for the purpose of clearly describing the technical solution and highlighting the key points of the utility model. It is not intended to limit the technical solution to exclude these unshown elements. In other words, the drawings are merely illustrative and do not limit the specific form of solar cell 100.

[0050] It should be noted that the drawings provided in this application are schematic diagrams, and some elements are not shown in the drawings. The purpose is to clearly describe the technical solution and highlight the key points of the invention. It is not intended to limit the technical solution to not including these unshown elements. For example, Figures 2 to 16 and Figures 19 to 23 In the figure, only part of the structure of the solar cell 100 is shown, and the entire structure of the solar cell 100 is not shown. In fact, the solar cell 100 may include more parts, for example, Figure 2 The solar cell 100 may include other cell structures such as a passivation layer 60, a tunneling layer 70, a gate line 80, and a substrate 90, which are not shown. Figure 1 As shown, the battery structure includes a passivation layer 60, a tunneling layer 70, a gate line 80, a substrate 90, etc. Figure 1 The figure only shows that the solar cell 100 is a bifacial cell. In other embodiments, the solar cell 100 may also be a monofacial cell, which is not limited here.

[0051] like Figures 2 to 16 As shown, the solar cell 100 provided by the present invention includes a doping region 20, a first insulating region 10, and a first cell edge 30 in contact with an adjacent cell 200. The doping region 20 can be P-type doping or N-type doping, or can be composed of alternating P-type doping and N-type doping. The first cell edge 30 is specifically the edge of one side of the solar cell 100. For the solar cell 100, when preparing the cell assembly 1001. Figure 4 、 Figure 11 and Figure 12As shown, when there are adjacent cell sheets 200 on both sides of the solar cell 100, a first cell edge 30 can be provided on both sides of the solar cell 100. Specifically, a first cell edge 30 is provided on both sides of the solar cell 100 along the width direction, so a first insulating region 10 is provided on both side edges of the solar cell 100.

[0052] like Figure 3 、 Figure 6 and Figure 9 As shown, when there is an adjacent cell 200 on one side of the solar cell 100 and no adjacent cell 200 on the other side of the solar cell 100, a first cell edge 30 may be provided on one side of the solar cell 100, while no first cell edge 30 is provided on the other side of the solar cell 100. That is, the first cell edge 30 is provided on the side of the solar cell 100 close to the adjacent cell 200, while the first cell edge 30 is not provided on the side of the solar cell 100 facing away from the adjacent cell 200. Correspondingly, a first insulating region 10 is provided on the side of the solar cell 100 close to the adjacent cell 200, while no first insulating region 10 is provided on the side of the solar cell 100 facing away from the adjacent cell 200.

[0053] The first insulating region 10 is specifically located between the first battery side 30 and the doped region 20 . The first insulating region 10 electrically isolates the doped region 20 from the adjacent battery cell 200 .

[0054] Therefore, in the embodiment of the present invention, by providing a first insulating region 10 on the solar cell 100, the first insulating region 10 is located between the first cell edge 30 and the doped region 20, thereby performing an electrical isolation function. This can isolate the doped region 20 of the solar cell 100 from the adjacent cell 200, thereby preventing the carriers (electrons and holes) of the solar cell 100 from leaking through the contact between adjacent cell 200. Therefore, by providing the first insulating region 10 on the solar cell 100, the present invention can reduce leakage, thereby improving the photoelectric conversion efficiency of the entire battery assembly 1001 and improving the product yield. In addition, the extension direction of the first insulating region 10 can specifically intersect with the welding direction of the solar cell 100, and the doped region 20 can specifically be provided on one side of the solar cell 100 or on two opposite sides of the solar cell 100.

[0055] In addition, in the present invention, the solar cell 100 can be a single-sided solar cell 100 or a double-sided solar cell 100. Figure 5 、 Figure 6 、 Figure 11 、 Figure 15 As shown, for a single-sided solar cell 100, a first insulating region 10 may be provided on one side of the solar cell 100; Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 12 、 Figure 13 、 Figure 14 and Figure 16 As shown, for a bifacial solar cell 100, a first insulating region 10 may be provided on two opposite sides of the solar cell 100 in the height direction. Optionally, the solar cell 100 may be a TOPCon solar cell 100, an HJT solar cell 100, a BC solar cell 100, a PERC solar cell 100, or a perovskite tandem solar cell 100.

[0056] Of course, in a battery string, the contact between adjacent battery cells 200 and the solar cell 100 can be as follows: Figures 5 to 13 As shown, the adjacent cells 200 and the solar cell 100 are arranged flatly, and the adjacent cells 200 are in contact with the first cell edge 30 of the solar cell 100; the contact between the adjacent cells 200 and the solar cell 100 can also be as follows Figures 14 to 16 As shown, the solar cell 100 and the adjacent cell 200 are stacked, the solar cell 100 and the adjacent cell 200 partially overlap, and the adjacent cell 200 and the first cell edge 30 and the first insulating region 10 of the solar cell 100 are in contact.

[0057] Optionally, in one embodiment, the width of the first insulating region 10 is 0.05 mm to 15 mm. If the width of the first insulating region 10 is too narrow, effective electrical isolation may not be achieved. Furthermore, when the solar cell 100 and the adjacent cell 200 are partially overlapped, a narrow width of the first insulating region 10 may not effectively electrically isolate the doped region 20 from the adjacent cell 200. If the width of the first insulating region 10 is too wide, it will occupy the effective working area of ​​the solar cell 100, reducing the area for generating photogenerated carriers and directly leading to a decrease in photoelectric conversion efficiency.

[0058] Preferably, the width of the first insulating region 10 can be set to 0.05 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 8 mm, 10 mm, or 15 mm, which achieves the best balance between electrical isolation and photoelectric conversion efficiency.

[0059] Optionally, regarding the composition of the first insulating region 10 , in a possible implementation manner, the first insulating region 10 is a dielectric layer including at least one of silicon oxide, silicon nitride, aluminum oxide, and aluminum oxynitride.

[0060] Specifically, the first insulating region 10 may be a dielectric layer directly deposited on the substrate 90 , and the first insulating region 10 may include at least one of silicon oxide, silicon nitride, aluminum oxide, aluminum oxynitride, or other oxides or other oxynitrides.

[0061] In one embodiment, the first insulating region 10 can be formed by laser + alkali etching, that is, the first insulating region 10 is first demarcated by laser, and then etched with a strong base such as sodium hydroxide or potassium hydroxide to form the first insulating region 10 composed of silicon oxide. Of course, in other embodiments, the first insulating region 10 can also be composed of silicon nitride, aluminum oxide, aluminum oxynitride, or other oxides or other nitride oxides; in addition, the first insulating region 10 can also be composed of silicon nitride and silicon oxide. That is, the first insulating region 10 can include at least one of silicon oxide, silicon nitride, aluminum oxide, aluminum oxynitride, or other oxides or other nitride oxides.

[0062] In addition, regarding the shape of the first insulating region 10 , in a possible implementation manner, the surface of the first insulating region 10 is a suede surface.

[0063] Specifically, the surface of the first insulating region 10 can be configured as a velvet surface. This velvet structure can effectively reduce light reflection on the surface of the solar cell 100. The uneven velvet surface scatters incident light, causing it to reflect multiple times at different angles and ultimately enter the cell, increasing the probability of light absorption. This improves the light absorption efficiency of the solar cell 100 and enhances the photoelectric conversion efficiency of the solar cell 100.

[0064] Furthermore, if Figure 2 、 Figure 5 、 Figure 7 、 Figure 8 and Figure 14 As shown, in one possible embodiment, the solar cell 100 further includes a second insulating region 40 and a second cell edge 50. The second cell edge 50 is disposed opposite the first cell edge 30 and is located on a side of the solar cell 100 facing away from the adjacent cell 200. The second insulating region 40 is located between the second cell edge 50 and the doped region 20.

[0065] Specifically, the solar cell 100 further includes a second cell side 50, and no adjacent cell 200 is disposed on one side of the second cell side 50. In this embodiment of the present invention, the second cell side 50 and the first cell side 30 are disposed opposite each other along the width of the solar cell 100. Along the width of the solar cell 100, the doped region is located between the first cell side 30 and the second cell side 50.

[0066] In the present invention, a second insulating region 40 may also be provided between the second cell side 50 and the doping region 20. This is because for the solar cell 100, even when a cell string is manufactured, no adjacent cell piece 200 is provided on the side of the second cell side 50 of the solar cell 100. However, in actual application, the second cell side 50 of the solar cell 100 may still be in direct contact with other conductive elements, thereby causing leakage of the solar cell 100.

[0067] Therefore, in the embodiment of the present invention, by providing a second insulating region 40 on the solar cell 100, the first insulating region 10 is located between the second cell edge 50 and the doped region 20, thereby performing an electrical isolation function. This can completely isolate the doped region 20 of the solar cell 100 from other conductive elements, thereby preventing the carriers (electrons and holes) of the solar cell 100 from leaking through contact with other conductive elements. Therefore, by providing a second insulating region 40 on the solar cell 100, the present invention reduces leakage, thereby improving the photoelectric conversion efficiency of the entire battery assembly 1001 and improving the product yield. Furthermore, the extension direction of the second insulating region 40 can specifically intersect with the welding direction of the solar cell 100.

[0068] Moreover, by setting the first insulating region 10 and the second insulating region 40, the doping region 20 of the solar cell 100 can be fully isolated to prevent the solar cell 100 from leaking electricity when it contacts the adjacent cell 200 or other conductive elements, thereby improving the battery efficiency and product yield of the solar cell 100.

[0069] Of course, for the solar cell 100 provided by the present invention, the first insulating region 10 and the second insulating region 40 may have the same structure. Figure 4 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 16 As shown, the solar cell 100 may be a structure in which first insulating regions are provided on both sides thereof; or Figure 2 、 Figure 5 、 Figure 7 、 Figure 8 and Figure 14 As shown, the solar cell 100 may also be provided with a structure having both the first insulating region 10 and the second insulating region 40 .

[0070] like Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 14 、 Figure 15 and Figure 16 As shown, when an adjacent cell 200 exists on one side of the solar cell 100 and no adjacent cell 200 exists on the other side of the solar cell 100, a first cell edge 30 may be provided on one side of the solar cell 100, while a second cell edge 50 may be provided on the other side of the solar cell 100. Specifically, the first cell edge 30 is provided on the side of the solar cell 100 close to the adjacent cell 200, and the second cell edge 50 is provided on the side of the solar cell 100 facing away from the adjacent cell 200. Correspondingly, a first insulating region 10 is provided on the side of the solar cell 100 close to the adjacent cell 200, and a second insulating region 40 is provided on the side of the solar cell 100 facing away from the adjacent cell 200.

[0071] Optionally, in one possible embodiment, the width of the second insulating region 40 is 0.05 mm to 15 mm. If the width of the second insulating region 40 is too narrow, effective electrical isolation may not be achieved. Furthermore, when the solar cell 100 and the adjacent cell 200 are partially overlapped, a too narrow width of the second insulating region 40 may not effectively electrically isolate the doped region 20 from the adjacent cell 200. If the width of the second insulating region 40 is too wide, it will occupy the effective working area of ​​the solar cell 100, reducing the area for generating photogenerated carriers and directly leading to a decrease in photoelectric conversion efficiency.

[0072] Preferably, the width of the second insulating region 40 can be set to 0.05 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 8 mm, 10 mm, or 15 mm, which achieves the best balance between electrical isolation and photoelectric conversion efficiency.

[0073] Optionally, regarding the composition of the second insulating region 40 , in a possible implementation manner, the second insulating region 40 is a dielectric layer including at least one of silicon oxide, silicon nitride, aluminum oxide, and aluminum oxynitride.

[0074] Specifically, the second insulating region 40 may be a dielectric layer directly deposited on the substrate 90 , and may include at least one of silicon oxide, silicon nitride, aluminum oxide, aluminum oxynitride, or other oxides or other oxynitrides.

[0075] In one embodiment, the second insulating region 40 can be formed by laser and alkali etching. Specifically, the second insulating region 40 is first demarcated by laser, and then etched with a strong base such as sodium hydroxide or potassium hydroxide to form the second insulating region 40 composed of silicon oxide. Of course, in other embodiments, the second insulating region 40 can also be composed of silicon nitride, aluminum oxide, aluminum oxynitride, or other oxides or oxynitrides. In addition, the second insulating region 40 can also be composed of silicon nitride and silicon oxide. In other words, the second insulating region 40 can include at least one of silicon oxide, silicon nitride, aluminum oxide, aluminum oxynitride, or other oxides or oxynitrides.

[0076] In addition, regarding the shape of the second insulating region 40 , in a possible implementation manner, the surface of the second insulating region 40 is a suede surface.

[0077] Specifically, the surface of the second insulating region 40 can be configured as a velvet surface. The velvet structure can effectively reduce light reflection on the surface of the solar cell 100. Because the uneven velvet surface scatters incident light, the light is reflected multiple times at different angles and ultimately enters the interior of the cell, increasing the probability of light absorption. In this way, the light absorption efficiency of the solar cell 100 can be improved, thereby improving the photoelectric conversion efficiency of the solar cell 100.

[0078] Furthermore, for the battery assembly 1001, two adjacent solar cells 100 can be Figure 22 and Figure 23 As shown, the arrangement is partially overlapped to reduce the spacing between the solar cells 100, that is, the adjacent two solar cells 100 are stacked. In the battery assembly 1001, by arranging the adjacent two solar cells 100 to be partially overlapped, that is, stacked, a seamless arrangement of the solar cells 100 can be achieved, thereby reducing the spacing between the cells of the battery assembly 1001, increasing the conversion efficiency of the battery assembly 1001, and increasing the aesthetics of the battery assembly 1001. Of course, the adjacent two solar cells 100 can also be as follows Figure 19 、 Figure 20 and Figure 21 As shown, two adjacent solar cells 100 are not arranged overlappingly, but are arranged flatly.

[0079] In the present invention, the provision of the first insulating region 10 can avoid leakage caused by contact between adjacent stacked solar cells 100; similarly, the provision of the solar cells 100 can also avoid leakage caused by contact between adjacent flat solar cells 100.

[0080] like Figure 19 and Figure 22As shown, for a single-sided solar cell 100 , the first insulating region 10 only needs to be provided on the side of the solar cell 100 where the grid lines are provided.

[0081] like Figure 20 、 Figure 21 and Figure 23 As shown, for a bifacial solar cell 100 , the first insulating region 10 may be provided on both sides where the grid lines are provided, or may be provided on only one side where the grid lines are provided.

[0082] Specifically, in the battery assembly 1001, for the bifacial solar cells 100 arranged in a flat configuration, since both sides of the solar cell 100 provided with the grid lines will be in contact, the first insulating region 10 needs to be provided on both sides of the bifacial solar cell 100 provided with the grid lines. Of course, in the battery assembly 1001, for the bifacial solar cells 100 arranged in a stacked configuration, the first insulating region 10 can be provided on only one side provided with the grid lines.

[0083] Of course, in one possible embodiment, two solar cells 100 partially overlap, that is, two adjacent solar cells 100 are stacked. The overlapping area of ​​the two adjacent solar cells 100 is smaller than the area of ​​the first insulating region 10. This ensures that the two adjacent solar cells 100 in the stacked arrangement are adequately isolated to prevent unnecessary electrical short circuits or leakage, thereby ensuring the safety and electrical performance of the battery assembly 1001.

[0084] Throughout this specification, reference to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0085] In addition, the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A solar cell, characterized in that: include: a doped region, a first insulating region, and a first cell edge in contact with an adjacent cell; The first insulating region is located between the first battery side and the doped region, and electrically isolates the doped region from the adjacent battery cell.

2. The solar cell according to claim 1, wherein Also includes: A second insulating region and a second cell edge, the second cell edge being arranged opposite to the first cell edge, the second cell edge being located on a side of the solar cell away from the adjacent cell sheet, and the second insulating region being located between the second cell edge and the doping region.

3. The solar cell according to claim 1, wherein The width of the first insulating region is 0.05 mm to 15 mm.

4. The solar cell according to claim 2, wherein The width of the second insulating region is 0.05 mm to 15 mm.

5. The solar cell according to claim 1, wherein The first insulating region is a dielectric layer including at least one of silicon oxide, silicon nitride, aluminum oxide, and aluminum oxynitride.

6. The solar cell according to claim 2, wherein The second insulating region is a dielectric layer including at least one of silicon oxide, silicon nitride, aluminum oxide, and aluminum oxynitride.

7. The solar cell according to claim 1, wherein The surface of the first insulating region is velvet.

8. The solar cell according to claim 2, wherein The surface of the second insulating region is velvet.

9. A battery assembly, characterized in that: The method comprises a plurality of solar cells according to any one of claims 1 to 8.

10. The battery assembly according to claim 9, characterized in that Two adjacent solar cells partially overlap; The overlapping area of ​​two adjacent solar cells is smaller than the area of ​​the first insulating region.

11. A photovoltaic system, characterized in that: Comprising the battery assembly as claimed in claim 10.

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