Solar cell and photovoltaic module

Abstract

The utility model discloses a solar cell piece and a photovoltaic module, the solar cell piece comprises a cell piece body, the cell piece body is provided with a light receiving surface and a backlight surface, the backlight surface is provided with electrodes, the light receiving surface is provided with a plurality of separators which are arranged at intervals, and the electrodes are arranged on the electrodes. And the extension direction of at least part of the separators is staggered with the extension direction of the electrodes. Therefore, in the stacking process of the battery pieces, the light-receiving surfaces of the battery pieces can be isolated and protected, the light-receiving surfaces of the battery pieces are prevented from being scratched by electrodes on the adjacent battery pieces, meanwhile, shielding of the light-receiving surfaces of the battery pieces can be reduced, and the conversion efficiency of the battery pieces is improved. Besides, the extension directions of at least part of the separators are arranged to be staggered with the extension directions of the electrodes, so that part of the separators can always form isolation support on the electrodes on the adjacent battery pieces when the battery pieces are stacked, and the isolation protection effect on the light receiving surface is further improved.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on March 29, 2024, with application number 202420644202.9 and invention name “A solar cell and photovoltaic module”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application belongs to the field of photovoltaic technology, and specifically relates to a solar cell and a photovoltaic module. Background Art

[0003] In back-contact cells, the positive and negative electrodes are placed on the back of the cell to avoid blocking the front of the cell, thereby improving the conversion efficiency of the solar cell. During the production and preparation of back-contact cells, a material box is required to hold and transport the cells. In order to avoid scratches between the cells, two adjacent cells need to be isolated.

[0004] In the related art, a film layer is applied to the entire front surface of the cell to isolate and protect the cell during the stacking process to prevent the front surface of the cell from being scratched. However, this method of applying a film layer to the front surface of the cell affects the conversion efficiency of the cell due to the poor light transmittance of the protective film layer. At the same time, the production cost of applying a film layer to the entire surface is high. Utility Model Content

[0005] The present application aims to provide a solar cell and a photovoltaic module, which can solve the problem in the related art that the conversion efficiency of the cell is affected by covering the entire front surface of the cell with a film layer, and the production cost is high.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application proposes a solar cell, comprising: a cell body, the cell body having a light-receiving surface and a backlight surface, the backlight surface being provided with an electrode, the light-receiving surface being provided with a plurality of spaced-apart insulating members, and the extension direction of at least some of the insulating members being intersecting with the extension direction of the electrodes.

[0008] Optionally, the isolating element is formed by a plurality of point-shaped protrusions and / or a plurality of line-shaped protrusions arranged in sequence and at intervals along a preset direction, and the preset direction is the extending direction of the isolating element; or, the isolating element is a continuously extending strip-shaped protrusion.

[0009] Optionally, an extension direction of at least part of the isolation member forms a first angle with an extension direction of the electrode, and the first angle ranges from 30° to 150°.

[0010] Optionally, the isolation member includes a plurality of first isolation members arranged at intervals, the extension directions of the plurality of first isolation members are consistent, and the extension direction of the first isolation member is staggered with the extension direction of the electrode.

[0011] Optionally, the isolating member further includes a plurality of second isolating members, the plurality of second isolating members are arranged at intervals, and the extension directions of the second isolating members are respectively intersected with the extension directions of the first isolating members and the extension directions of the electrodes.

[0012] Optionally, an extension direction of the first isolating member and an extension direction of the second isolating member form a second angle, and the second angle ranges from 60° to 180°.

[0013] Optionally, the light receiving surface includes four areas, namely, a first area, a second area, a third area and a fourth area; the first area and the second area are arranged along a first direction, and the third area and the fourth area are arranged along the first direction; the first area and the third area are arranged along a second direction, and the second area and the fourth area are arranged along the second direction, and the first direction is perpendicular to the second direction; the first isolation member is provided in the second area and the third area, and the second isolation member is provided in the first area and the fourth area.

[0014] Optionally, the isolation elements in two adjacent areas are connected to each other; or, a blank area is provided between two adjacent areas.

[0015] Optionally, the plurality of isolation members on the light receiving surface are distributed axially symmetrically.

[0016] Optionally, the isolating member further includes a third isolating member, wherein the third isolating member is disposed around at least a portion of a circumferential edge of the light receiving surface, and the third isolating member is connected to the first isolating member and / or the second isolating member.

[0017] Optionally, the third isolation member is disposed around a portion of the circumferential edge of the light receiving surface to form a partial edge sealing structure.

[0018] Optionally, the battery cell body has four side edges, each of the side edges is correspondingly provided with the third isolating member, and the distance from the third isolating member to the corresponding side edge is less than or equal to 5 mm.

[0019] Optionally, at least part of the isolation member is enclosed to form an annular structure.

[0020] Optionally, the light receiving surface is provided with a plurality of the annular structures, and the plurality of the annular structures are arranged in an array.

[0021] Optionally, the light receiving surface is provided with a plurality of regions, each of the regions is provided with the isolation member, and the extension directions of the isolation members in two adjacent regions are staggered.

[0022] Optionally, the backlight surface is provided with a bus electrode and a collector electrode connected to each other, and the electrode refers to the one with a higher height between the bus electrode and the collector electrode;

[0023] Alternatively, the backlight surface is only provided with a collector electrode, and the electrode refers to the collector electrode.

[0024] In a second aspect, an embodiment of the present application provides a photovoltaic module, comprising any of the solar cell sheets described above.

[0025] In a third aspect, an embodiment of the present application provides a photovoltaic module, including a solar cell and a polymer layer;

[0026] The solar cell comprises: a cell body, the cell body having a light-receiving surface and a backlight surface, the backlight surface being provided with an electrode, the light-receiving surface being provided with a plurality of isolation marks arranged at intervals, and the extension direction of at least part of the isolation marks being intersected with the extension direction of the electrodes;

[0027] The polymer layer is disposed on the light-receiving surface of the battery cell body, and the polymer layer covers the isolation trace.

[0028] Optionally, the isolation trace is formed by a plurality of dot traces and / or a plurality of line traces arranged in sequence and at intervals along a preset direction, and the preset direction is an extension direction of the isolation trace; or, the isolation trace is a continuously extending strip trace.

[0029] In the embodiment of the present application, by setting a plurality of spaced-apart isolating members on the light-receiving surface of the cell, the light-receiving surface of the cell can be isolated and protected during the cell stacking process to prevent the light-receiving surface of the cell from being scratched by the electrodes on the adjacent cell, and at the same time, the light-receiving surface of the cell can be shielded and the conversion efficiency of the cell can be improved. In addition, by setting the extension direction of at least part of the isolating members to intersect with the extension direction of the electrodes, it is ensured that when the cell is stacked, there are always some isolating members that can form isolation support for the electrodes on the adjacent cell, and the isolating members can be prevented from being offset into the gap between the electrodes due to the offset of the cell, thereby further improving the isolation and protection of the light-receiving surface.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 is a schematic diagram of a solar cell according to an embodiment of the present application;

[0033] Figure 2 is a cross-sectional view of a solar cell according to an embodiment of the present application;

[0034] Figure 3 is a structural schematic diagram of a process of placing solar cells into a material box according to an embodiment of the present application;

[0035] Figure 4 is a schematic diagram of a stacked structure of solar cells according to an embodiment of the present application;

[0036] Figure 5 This is a schematic diagram of a solar cell stacking structure in the related art;

[0037] Figure 6 It is another schematic diagram of a solar cell stacking structure in the related art;

[0038] Figure 7 is a schematic diagram of a second solar cell according to an embodiment of the present application;

[0039] Figure 8 is a schematic diagram of the matching structure of two battery cells provided with a single extending direction isolation member according to an embodiment of the present application;

[0040] Fig. 9 is a schematic diagram of the matching structure of two battery cells provided with spacers in cross-extension directions according to an embodiment of the present application;

[0041] Fig.10 is a schematic diagram of a third solar cell according to an embodiment of the present application;

[0042] Fig.11 is a schematic diagram of a fourth solar cell according to an embodiment of the present application;

[0043] Fig.12 is a schematic diagram of a fifth solar cell according to an embodiment of the present application;

[0044] Fig.13 is a schematic diagram of a sixth solar cell according to an embodiment of the present application;

[0045] Fig.14 is a schematic diagram of a seventh solar cell according to an embodiment of the present application;

[0046] Fig.15is a schematic diagram of an eighth solar cell according to an embodiment of the present application;

[0047] Fig.16 is a schematic diagram of a ninth solar cell according to an embodiment of the present application.

[0048] Reference numerals:

[0049] 100: battery cell; 100a: battery cell body; 101: light-receiving surface; 102: backlight surface; 102a: first area; 102b: second area; 102c: third area; 102d: fourth area; 102e: blank area; 103: side; 110: electrode; 120: spacer; 121: first spacer; 122: second spacer; 123: third spacer; 124: ring structure; 130: isolation paper; 140: film layer; 200: material box; X: first direction; Y: second direction; A: first angle; B: second angle. DETAILED DESCRIPTION

[0050] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0051] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] The solar cell and photovoltaic module provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0055] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, the solar cell 100 includes: a cell body 100a, the cell body 100a has a light-receiving surface 101 and a backlight surface 102, the backlight surface 102 is provided with an electrode 110, and the light-receiving surface 101 is provided with a plurality of spaced-apart insulating members 120, and the extension direction of at least some of the insulating members 120 is staggered with the extension direction of the electrodes 110.

[0056] In the embodiment of the present application, by setting a plurality of spaced-apart spacers 120 on the light-receiving surface 101 of the cell 100, it can not only play an isolating and protecting role on the light-receiving surface 101 of the cell 100 during the stacking process of the cell 100, and prevent the light-receiving surface 101 of the cell 100 from being scratched by the electrode 110 on the adjacent cell 100, but also reduce the shielding of the light-receiving surface 101 of the cell 100, and improve the conversion efficiency of the cell 100. In addition, by setting the extension direction of at least part of the spacers 120 to intersect with the extension direction of the electrode 110, it is ensured that when the cell 100 is stacked, there are always part of the spacers 120 that can form an isolating support for the electrode 110 on the adjacent cell 100, thereby further improving the isolating and protecting role on the light-receiving surface 101.

[0057] Specifically, the solar cell 100 (hereinafter referred to as the cell 100) includes a cell body 100a, and the cell body 100a has a light-receiving surface 101 and a backlight surface 102. The light-receiving surface 101 is a side of the cell 100 that receives incident light, and the backlight surface 102 is a side of the cell 100 that is away from the light-receiving surface 101. Exemplarily, the cell 100 in the embodiment of the present application is a back-contact solar cell, and the electrodes 110 of the back-contact solar cell are all arranged on the backlight surface 102.

[0058] It is understandable that if Figure 3As shown, in the photovoltaic module production process, after the battery cell 100 is prepared, it is usually necessary to use a material box 200 to hold the battery cell 100 and transfer it to the subsequent process for the production of photovoltaic modules. When multiple battery cells 100 are stacked, the battery cell 100 is sucked by the transfer mechanism and moved to the preset position above the material box 200, and then the battery cell 100 is released, so that the battery cell 100 can slide freely into the material box 200. When the upper battery cell 100 falls, there will be a certain amount of sliding between the upper and lower battery cells 100, and the electrode 110 of the falling battery cell 100 or the edge of the battery cell 100 will directly contact the surface of the lower battery cell 100, which is easy to cause friction scratches on the surface of the battery cell 100.

[0059] Therefore, in the actual production process, it is usually necessary to isolate the two battery cells 100. Figure 5 As shown, one method in the related art is to place a separation paper 130 between two battery cells 100 to isolate and protect the light-receiving surface 101 of the battery cell 100. However, in this method of isolation using separation paper, the separation paper needs to be removed before the lamination process, which is not only cumbersome, but also has a high production cost. In addition, the debris of the separation paper is easily attached to the surface of the battery cell, affecting the quality of the laminate.

[0060] In addition, if Figure 6 As shown, another method in the related art is to directly form a whole layer of adhesive film layer 140 on the light-receiving surface 101 of the cell 100, so that the adhesive film layer 140 covers the light-receiving surface 101 of the cell 100 as a whole, so as to isolate and protect the two cells 100 during the stacking process. However, when the adhesive film layer 140 is set as a whole layer, the light-receiving surface 101 is blocked due to the poor light transmittance of the adhesive film layer 140, which affects the light reception of the light-receiving surface 101, thereby reducing the conversion efficiency of the photovoltaic module.

[0061] In the embodiments of the present application, Figure 4 As shown, a plurality of spaced-apart isolation members 120 are provided on the light-receiving surface 101 of the battery cell body 100a, so that when the battery cells 100 are stacked, the isolation members 120 are used to isolate and support between two adjacent battery cells 100, thereby forming an isolation and protection effect on the light-receiving surface 101 of the battery cell 100, thereby preventing the light-receiving surface 101 of the battery cell 100 from being scratched by the adjacent battery cells 100.

[0062] At the same time, in order to avoid the electrodes 110 and the isolation members 120 in the upper and lower battery cells 100 being unable to play an effective isolation role when they are arranged in parallel and offset, in the embodiment of the present application, by setting the extension direction of at least part of the isolation members 120 to be staggered with the extension direction of the electrodes 110, it is ensured that there is always part of the isolation member 120 that can isolate and support between the light-receiving surface 101 of the battery cell 100 and the electrode 110 of the adjacent battery cell 100, thereby enhancing the isolation and protection effect on the light-receiving surface 101 of the battery cell 100.

[0063] It should be noted that when the battery cells 100 are contained in the material box 200, the plurality of battery cells 100 are usually stacked in sequence in the material box 200 in a manner that the light-receiving surfaces 101 are all facing upward or the backlight surfaces 102 are all facing upward. For example, in the embodiment of the present application, the plurality of battery cells 100 are contained in the material box 200 in a manner that the light-receiving surfaces 101 are facing upward is used as an example for explanation. When the battery cells 100 are stacked in other ways, the same can be applied and will not be described in detail here.

[0064] Specifically, Figure 1 and Figure 2 As shown, a plurality of spacers 120 are provided in the light-receiving surface 101 of the cell body 100a, and a plurality of electrodes arranged at intervals are provided in the backlight surface 102 of the cell body 100a. The spacers 120 protrude from the light-receiving surface 101 of the cell body 100a in a direction away from the light-receiving surface 101, so that when the cells 100 are stacked, the spacers 120 can support adjacent cells 100, thereby isolating and protecting the light-receiving surface 101. At the same time, the spacers 120 are arranged at intervals to reduce the shielding of the light-receiving surface 101.

[0065] In a specific application, the extension directions of different isolating members 120 provided in the light-receiving surface 101 may be the same or different, and it is only necessary to ensure that the extension direction of at least some of the isolating members 120 intersects with the extension direction of the electrodes 110 in the backlight surface 102 .

[0066] In some embodiments, Figure 1 and Fig.16 As shown, the isolation member 120 is formed by a plurality of dot-shaped protrusions and / or a plurality of linear protrusions arranged in sequence and at intervals along a preset direction, and the preset direction is the extension direction of the isolation member.

[0067] In the embodiment of the present application, the isolating member 120 is formed by a plurality of dot-shaped protrusions and / or a plurality of linear protrusions arranged in sequence along a preset direction, so that the isolating member 120 can be used to isolate and protect the surface of the battery cell 100, and the coverage area of ​​the isolating member 120 on the surface of the battery cell body 100a can be further reduced, thereby saving the preparation material of the isolating member. In addition, since the refractive index of the isolating member 120 is different from the refractive index of the battery cell body 100a, by setting dot-shaped or linear protrusions on the surface of the battery cell body 100a, a light trapping effect can also be formed, which helps to improve the light absorption rate of the battery cell 100, thereby improving the conversion efficiency of the battery cell 100.

[0068] In addition, in the process of preparing photovoltaic modules from the cell 100, it is usually necessary to form a polymer layer on the surface of the cell body 100a, and the isolation member 120 is located between the polymer layer and the cell body 100a. By reducing the coverage area of ​​the isolation member 120 on the surface of the cell body 100a, it helps to increase the contact area between the polymer layer and the cell body 100a, thereby reducing the effect of the isolation member 120 on the interface bonding force between the polymer layer and the cell body 100a.

[0069] Specifically, a plurality of isolation members 120 may be provided on the surface of the battery cell body 100a, each isolation member 120 being formed by a plurality of dot-shaped protrusions arranged in sequence at intervals, or by a plurality of linear protrusions arranged in sequence at intervals, or by a plurality of dot-shaped protrusions and a plurality of linear protrusions arranged in sequence at intervals.

[0070] For example, Fig.16 As shown, a plurality of dot-shaped protrusions in the dotted frame form an isolating member 120 , and a plurality of isolating members 120 can be formed on the surface of the battery cell body. The sequential arrangement direction of the plurality of dot-shaped protrusions in each isolating member 120 is the extension direction of the isolating member 120 .

[0071] It should be noted that the number of dot-shaped protrusions or line-shaped protrusions forming each isolation member 120 is not limited, and the distance between two adjacent protrusion structures (including dot-shaped protrusions and line-shaped protrusions) in each isolation member 120 is not limited.

[0072] It can be understood that the point-shaped protrusion means that the size of the corresponding protrusion structure along the extension direction of the isolation member 120 is slightly different from the size along the extension direction perpendicular to the isolation member 120. The line-shaped protrusion means that the size of the corresponding protrusion structure along the extension direction of the isolation member 120 is slightly different from the size along the extension direction perpendicular to the isolation member 120.

[0073] In other embodiments, Figures 7 to 14As shown, the isolation member 120 is a continuously extending strip-shaped protrusion, wherein the extending direction of the strip-shaped protrusion is the extending direction of the isolation member 120 .

[0074] In the embodiment of the present application, the isolation member 120 is provided as a continuously extending strip-shaped protrusion, so as to facilitate the actual design and processing. At the same time, the bonding force between the strip-shaped protrusion and the surface of the battery cell body 100a is relatively large, and it is not easy to be damaged during use, which can enhance the isolation and protection effect on the battery cell.

[0075] Furthermore, each strip protrusion may extend along a straight line or a curve. When the strip protrusion extends in a straight line, the extension direction of the straight line is the extension direction of the strip protrusion; and when the strip protrusion extends in a curve, the direction of the line connecting the two opposite ends of the strip protrusion is the extension direction of the strip protrusion.

[0076] In addition, the cross-sectional shape of the strip-shaped protrusion may be, for example, a parabola, a semicircle, a rectangle or a square, but is not limited thereto.

[0077] It should be noted that the extending direction of the isolation member 120 and the extending direction of the electrode 110 being staggered means that the extending direction of the isolation member 120 and the extending direction of the electrode 110 are not parallel.

[0078] Optionally, the backlight surface 102 is provided with a bus electrode and a collector electrode connected to each other, and the electrode 110 refers to the one with a higher height between the bus electrode and the collector electrode; or, the backlight surface 102 is provided with only a collector electrode, and the electrode 110 refers to the collector electrode. The height refers to the maximum size of the corresponding electrode in a direction perpendicular to the backlight surface 102.

[0079] It is understandable that, in the case where the backlight surface 102 of the cell 100 is provided with a bus electrode and a collector electrode, the electrode 110 described in the embodiment of the present application refers to the higher type of electrode between the bus electrode and the collector electrode. For example, in most cases, the height of the bus electrode is greater than the height of the collector electrode. In this case, the electrode 110 refers to the bus electrode arranged on the backlight surface 102 of the cell 100. In the case where only a collector electrode is arranged on the backlight surface 102 of the cell 100, the electrode 110 described in the embodiment of the present application refers to the collector electrode arranged on the backlight surface 102 of the cell 100. Generally, during the transportation of the cell 100, the conveying direction of the cell 100 is parallel to the extension direction of the electrode 110 on the surface of the cell 100.

[0080] In some embodiments, the isolation member 120 can be made of transparent materials, for example, acrylic resin, photosensitive adhesive, polyolefin elastomer (POE), ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), insulating adhesive, hot melt adhesive and other transparent materials.

[0081] It is understandable that in the photovoltaic module preparation process, a packaging film is usually set on both sides of the battery cell 100, and the preparation material of the isolation member 120 can be set to be the same or similar to the material of the packaging film, and then during lamination, the isolation member 120 can be directly laminated into the interior of the photovoltaic module, which can not only simplify the operating steps, but also reduce the impact of the isolation member 120 on the battery cell 100 receiving light.

[0082] Of course, the isolation member 120 may also be made of other types of transparent materials, which is not limited in the embodiment of the present application.

[0083] In addition, the shape of the battery cell 100 in the embodiment of the present application can be rectangular, square, or quasi-rectangular, quasi-square, etc. The arrangement structure of the several isolation members 120 on the light-receiving surface 101 of the battery cell 100 can be flexibly set according to the specific shape of the battery cell 100, and the embodiment of the present application is not limited to this.

[0084] It should be noted that if Figure 1 As shown, the light-receiving surface 101 of the cell body 100a may be provided with only a plurality of spacers 120 extending in the same direction. Figures 7 to 14 As shown, an isolation member 120 extending in different directions may also be provided, and may be flexibly provided according to actual conditions, and the embodiment of the present application does not limit this.

[0085] Alternatively, if Figure 1 As shown, at least a portion of the isolating member 120 extends in a direction that forms a first angle A with respect to the electrode 110 . The first angle A ranges from 30° to 150°.

[0086] In the embodiment of the present application, the angle range of the first angle A between the extension direction of at least part of the isolation member 120 and the extension direction of the electrode 110 is set, that is, at least part of the isolation member 120 is tilted relative to the electrode 110, so that when the battery cell 100 falling from above is offset, the partially tilted isolation member 120 can still play an effective isolation and protection role.

[0087] It is understandable that in the process of loading the battery cells 100 into the material box 200, when the upper battery cell 100 slides freely, a certain positional deviation will inevitably occur. The inventors have found through research that the deviation angle of the battery cells 100 when stacked generally does not exceed 30°.

[0088] Therefore, in the embodiment of the present application, by setting the first angle A between the extension direction of the isolation member 120 and the extension direction of the electrode 110 to be between 30° and 150°, even if the battery cell 100 is offset during the stacking process, the inclined isolation member 120 can still form an isolation support for the surface electrode 110 of the upper battery cell 100, thereby strengthening the isolation and protection of the light-receiving surface 101 of the battery cell 100. It should be noted that in the stacking process of the present application, it is necessary to avoid as much as possible the situation where the extension direction of the isolation member 120 is parallel to the extension direction of the electrode 110 due to the offset of the battery cell 100, because in this case, there is a possibility that the isolation member 120 is offset into the gap between the electrodes 110, so that the isolation member 120 cannot form effective contact and effective support for the surface electrode 110. The above-mentioned gap between the electrodes 110 refers to the position between two adjacent electrodes 110.

[0089] Specifically, the first angle A between the extension direction of the isolation member 120 and the extension direction of the electrode 110 can be set to any angle such as 30°, 45°, 60°, 75°, 80°, 90°, 110°, 120°, 135°, 150°, or a range between any two angles.

[0090] Alternatively, if Figure 1 and Figure 7 As shown, the isolation member 120 includes a plurality of first isolation members 121 arranged at intervals, the extension directions of the plurality of first isolation members 121 are consistent, and the extension direction of the first isolation members 121 is staggered with the extension direction of the electrode 110 .

[0091] In the embodiment of the present application, a plurality of first isolating members 121 are arranged at intervals on the light-receiving surface 101 of the battery cell body 100a. The plurality of first isolating members 121 extend in the same direction and are staggered with the extension direction of the electrode 110. This not only facilitates actual processing and manufacturing, but also enables the plurality of first isolating members 121 to form an effective isolation and protection effect on the light-receiving surface 101.

[0092] In some embodiments, the battery cell body 100a has four sides 103, and the first isolation member 121 can be a long strip-shaped protrusion structure extending continuously from one side 103 of the battery cell body 100a to another side 103; it can also be a plurality of strip-shaped or dot-shaped protrusion structures arranged and extending along a fixed direction between two sides 103.

[0093] In some embodiments, along the extension direction perpendicular to the electrode 110, the spacing between two adjacent electrodes 110 is a first spacing; along the extension direction perpendicular to the first spacer 121, the spacing between two adjacent first spacers 121 is a second spacing, which can be set to be smaller than the first spacing. For example, the first spacing can be set to 15 mm, and the second spacing is set to be smaller than 15 mm.

[0094] Alternatively, if Figure 7 As shown, the isolation member 120 further includes a plurality of second isolation members 122 , which are arranged at intervals, and the extension directions of the second isolation members 122 are respectively intersected with the extension directions of the first isolation members 121 and the electrode 110 .

[0095] It is understandable that if Figure 8 As shown, if only an isolating member 120 extending in a single direction is provided on the light-receiving surface 101 of the battery cell 100, when the battery cell 100 falling from above is offset at a certain angle during the stacking process, it is possible that the electrode 110 in the backlight surface 102 of the upper battery cell 100 is exactly parallel to the isolating member 120 of the light-receiving surface 101 of the lower battery cell 100. In this case, there is a possibility that the isolating member 120 is offset into the gap between the electrodes 110, so that the isolating member 120 cannot form an effective isolation support for the electrode 110, thereby causing the electrode 110 to directly contact the light-receiving surface 101 of the lower battery cell 100, which can easily cause the light-receiving surface 101 of the lower battery cell 100 to be scratched. It should be noted that when the electrode 110 is a bus electrode, a collector electrode is also provided at a position perpendicular to the bus electrode. Figure 8 The collector electrode is shown in the figure (in order to clearly see the relative relationship between the electrode 110 and the separator 120, the collector electrode is not completely drawn). Figure 8 This is just an example, the battery cell 100 may also have only a collector electrode without a bus electrode, in which case the electrode 110 is the collector electrode. Fig. 9 As shown, by setting the first isolating member 121 and the second isolating member 122, the extension direction of the first isolating member 121 and the second isolating member 122 are staggered with the extension direction of the electrode 110, and the extension directions of the first isolating member 121 and the second isolating member 122 are also staggered. In this way, during the stacking process of the battery cells 100, when the battery cell 100 falling from above is offset, even if the electrode in the upper battery cell 100 is parallel to one of the first isolating member 121 and the second isolating member 122, there is still another one that can be used to form an effective isolation support for the electrode 110, thereby avoiding the isolation failure problem caused by the electrode 110 in the upper battery cell 100 being exactly parallel to the isolating member 120 in the lower battery cell 100, and can enhance the isolation protection effect on the surface of the battery cell 100.

[0096] It is understandable that a plurality of first isolating members 121 and a plurality of second isolating members 122 may be provided and connected in pairs to form a mesh structure, thereby improving the overall structural strength of the isolating member 120 and extending the service life of the isolating member 120 .

[0097] Of course, the first isolating member 121 and the second isolating member 122 may be arranged to be disconnected from each other, so as to flexibly arrange the distribution of the isolating members 120 on the surface of the battery cell 100 . Meanwhile, the amount of raw materials required for preparing the isolating members 120 may be appropriately reduced.

[0098] In some embodiments, the distance between two adjacent second isolators 122 along the extension direction perpendicular to the second isolators 122 is a third distance, which can be set to be smaller than the first distance. For example, the first distance can be set to 15 mm, and the third distance is set to be smaller than 15 mm.

[0099] Alternatively, if Figure 7 As shown, the extension direction of the first isolating member 121 and the extension direction of the second isolating member 122 form a second angle B, and the range of the second angle B is: 60°-180°. Preferably, the second angle B is set to 90°.

[0100] In the embodiment of the present application, by setting the angle range of the second angle B between the extension direction of the first isolation member 121 and the extension direction of the second isolation member 122, when the battery cell 100 is offset during the stacking process of the battery cell 100, the first isolation member 121 and the second isolation member 122 can effectively protect the surface of the battery cell 100.

[0101] Specifically, the second angle B between the extension direction of the first isolation member 121 and the extension direction of the second isolation member 122 can be set to any angle such as 60°, 80°, 90°, 110°, 120°, 150°, 180°, or a range between any two angles.

[0102] Alternatively, if Figure 7 As shown, the light receiving surface 101 includes four areas, namely the first area 102a, the second area 102b, the third area 102c and the fourth area 102d; the first area 102a and the second area 102b are arranged along the first direction X, and the third area 102c and the fourth area 102d are arranged along the first direction X; the first area 102a and the third area 102c are arranged along the second direction Y, and the second area 102b and the fourth area 102d are arranged along the second direction Y, and the first direction X is perpendicular to the second direction Y; the first isolation member 121 is provided in the second area 102b and the third area 102c, and the second isolation member 122 is provided in the first area 102a and the fourth area 102d.

[0103] In the embodiment of the present application, the light-receiving surface 101 of the cell body 100a is divided into four regions, and the structures of the isolating members 120 in two regions distributed along the diagonal lines are the same in the four regions, and the extending directions of the isolating members 120 in two adjacent regions are different. In this way, during the stacking process of the cell 100, regardless of the deflection or bending of the cell 100, it can be ensured that the isolating member 120 and the electrode 110 between two adjacent cell 100 can overlap to the greatest extent, thereby enhancing the isolation and protection effect on the light-receiving surface 101 of the cell 100.

[0104] It should be noted that the positions of the first isolation member 121 and the second isolation member 122 in each region in the embodiment of the present application can be interchanged and can be flexibly set according to actual conditions, and the embodiment of the present application does not limit this.

[0105] Alternatively, if Fig.12 and Fig.13 As shown, the isolating members 120 in two adjacent regions are connected to each other. In the embodiment of the present application, the isolating members 120 in two adjacent regions are connected to each other to improve the overall structural strength of the isolating members 120, thereby improving the service life of the isolating members 120.

[0106] It is understandable that a second isolation member 122 in the first region 102a can be connected to at least one first isolation member 121 in the second region 102b; or, a second isolation member 122 in the first region 102a can be connected to at least one first isolation member 121 in the third region 102c.

[0107] Similarly, a second isolation member 122 in the fourth region 102d may be connected to at least one first isolation member 121 in the second region 102b; or, a second isolation member 122 in the fourth region 102d may be connected to at least one first isolation member 121 in the third region 102c.

[0108] Alternatively, if Figure 7 , Fig.10 and Fig.11 As shown, a blank area 102e is provided between two adjacent areas.

[0109] Specifically, a blank area 102e may be provided between the first area 102a and the third area 102c, and between the second area 102b and the fourth area 102d; or a blank area 102e may be provided between the first area 102a and the second area 102b, and between the third area 102c and the fourth area 102d. No spacer 120 is provided in the blank area 102e, so that in the battery cell processing process, the battery cell 100 can be cut from the blank area 102e to form a half-cell battery cell 100.

[0110] Alternatively, if Figure 7 As shown, the plurality of isolation members 120 on the light receiving surface 101 are distributed in an axisymmetric manner.

[0111] In the embodiment of the present application, a plurality of isolation members 120 are arranged on the light-receiving surface 101 in an axially symmetrical distribution so that the distribution structure of the isolation members 120 on the surface of the battery cell 100 is more regular. When the upper battery cell is offset during the stacking process, the isolation members 120 in at least one area can form an isolation support for the upper battery cell 100, thereby ensuring the isolation and protection of the light-receiving surface 101 of the battery cell 100.

[0112] Specifically, a first axis extending along a first direction X can be set through the center point of the light-receiving surface 101, and a plurality of spacers 120 on the light-receiving surface 101 are axially symmetrically distributed with the first axis as the axis of symmetry; or a second axis extending along a second direction Y can be set through the center point of the light-receiving surface 101, and a plurality of spacers 120 on the light-receiving surface 101 are axially symmetrically distributed with the second axis as the axis of symmetry. In specific applications, the cell can be cut based on the first axis or the second axis to obtain a half cell.

[0113] Alternatively, if Fig.10 and Fig.12 As shown, the isolation member 120 further includes a third isolation member 123 . The third isolation member 123 is disposed around at least a portion of the circumferential edge of the light receiving surface 101 . The third isolation member 123 is connected to the first isolation member 121 and / or the second isolation member 122 .

[0114] It is understandable that when stacking the battery cells 100 into the material box 200, it is necessary to use a transfer mechanism to suck the battery cells 100 for transfer. The transfer mechanism is provided with an adsorption plane, and the adsorption plane is provided with a plurality of adsorption holes. When performing the transfer operation, the adsorption plane of the transfer mechanism is brought into contact with the light-receiving surface 101 of the battery cell 100, and negative pressure is provided through the plurality of adsorption holes to use the adsorption plane to adsorb and fix the battery cell 100. When an isolation member 120 is provided on the light-receiving surface 101, since the isolation member 120 protrudes from the light-receiving surface 101, it will affect the fit between the adsorption plane of the transfer mechanism and the light-receiving surface 101 of the battery cell 100, thereby affecting the vacuum adsorption effect of the transfer mechanism on the battery cell 100.

[0115] To this end, in an embodiment of the present application, a third isolating member 123 is provided on the four edges of the light-receiving surface 101, so that the third isolating member 123 is provided around at least a portion of the circumferential edge of the light-receiving surface 101, and the third isolating member 123 is connected to the first isolating member 121 and / or the second isolating member 122. In this way, when the adsorption plane of the transfer mechanism contacts the isolating member 120 on the surface of the battery cell 100, a closed or semi-closed space is formed locally, which helps to improve the vacuum adsorption effect.

[0116] Specifically, the battery cell body 100a has four sides 103, and a third isolation member 123 can be set at a corresponding position of each side 103. The third isolation member 123 is parallel to the corresponding side 103, and the third isolation members 123 corresponding to two adjacent sides 103 can be connected to each other or not.

[0117] Alternatively, if Fig.10 As shown, the third isolation member 123 is disposed around a portion of the circumferential edge of the light receiving surface 101 to form a partial edge sealing structure.

[0118] In the embodiment of the present application, the third spacer 123 is arranged around a portion of the circumferential edge of the light-receiving surface 101, and the third spacer 123 is respectively connected to the corresponding first spacer 121 and / or second spacer 122 to form a partial edge sealing structure at the edge of the light-receiving surface 101. Thus, the vacuum adsorption of the battery cell 100 can be improved, and the amount of glue used to prepare the spacer 120 can be saved. At the same time, it is also convenient to cut the battery cell 100 in half.

[0119] Alternatively, if Fig.13 As shown, the third isolation member 123 is disposed around the edges of the light receiving surface 101 to form a closed loop structure.

[0120] In the embodiment of the present application, the third isolation member 123 is formed around the edges of the light-receiving surface 101 to form a closed-loop structure, so that when the adsorption plane of the transfer mechanism adsorbs and fixes the battery cell 100, the vacuum adsorption degree is higher, which can further reduce the influence of the isolation member 120 on the adsorption and fixation of the battery cell 100.

[0121] It should be noted that the closed-loop structure may be formed by the third isolating member 123 or by the third isolating member 123 and the first isolating member 121 and / or the second isolating member 122 at the edge being connected to each other to form a closed loop structure.

[0122] Alternatively, if Fig.10 As shown, the battery cell body 100a has four side edges 103, each side edge 103 is correspondingly provided with a third isolation member 123, and the distance from the third isolation member 123 to the corresponding side edge 103 is less than or equal to 5 mm.

[0123] In the embodiment of the present application, by setting the distance range between the third isolation member 123 corresponding to each side edge 103 and the side edge 103, the third isolation member 123 can be set to vacuum adsorb and fix the battery cell 100, and the third isolation member 123 can be used to isolate and protect the edge area of ​​the light-receiving surface 101 of the battery cell 100.

[0124] Specifically, the distance from the third isolation member 123 to the corresponding side edge 103 can be set to any value such as 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or a range between any two values.

[0125] In addition, a reinforcing protrusion can be set at the blank position on the edge of the light-receiving surface 101, so that the reinforcing protrusion is connected to the first isolation member 121 and / or the second isolation member 122 at the corresponding position to strengthen the isolation and protection effect on the edge area. The specific structure of the reinforcing protrusion can be flexibly set according to actual conditions, and the embodiment of the present application does not limit this.

[0126] Alternatively, if Fig.15 As shown, at least a portion of the isolation member 120 is enclosed to form an annular structure 124 .

[0127] In the embodiment of the present application, at least a portion of the isolation member 120 is enclosed to form an annular structure 124. Compared with the traditional full-surface covering film, the annular structure 124 can reduce the obstruction of the light-receiving surface 101 while ensuring the isolation and protection of the light-receiving surface 101. In addition, it can also reduce the amount of raw materials required for preparation and reduce production costs.

[0128] Among them, the annular structure 124 may include a triangular ring, a rectangular ring, a square ring, a trapezoidal ring, a diamond ring, or a polygonal ring of other shapes. The specific shape of the annular structure 124 formed by the isolation member 120 can be flexibly set according to actual needs, and the embodiment of the present application is not limited to this.

[0129] Alternatively, if Fig.15 As shown, the light receiving surface 101 is provided with a plurality of annular structures 124 , and the plurality of annular structures 124 are arranged in an array.

[0130] In the embodiment of the present application, multiple annular structures 124 are provided in the light receiving surface 101 and arranged in an array to effectively isolate and protect different areas of the light receiving surface 101, and at the same time, it is also convenient for actual design and processing.

[0131] Optionally, the light receiving surface 101 is provided with a plurality of regions, each region is provided with an isolating member 120 , and the extending directions of the isolating members 120 in two adjacent regions are staggered.

[0132] In the embodiment of the present application, the light-receiving surface 101 is divided into a plurality of regions, an isolation member 120 is provided in each region, and the extension directions of the isolation members 120 in two adjacent regions are staggered. In this way, during the stacking process of the battery cells 100, no matter how the battery cells 100 falling from above are offset or tilted, there are always some isolation members 120 that can form effective isolation supports for the electrodes 110 or edges of the battery cells 100 above, thereby enhancing the isolation and protection effect on the surface of the battery cells 100.

[0133] Optionally, an embodiment of the present application further provides a photovoltaic assembly, comprising the solar cell 100 in the above embodiment.

[0134] In the embodiment of the present application, by setting a plurality of spaced-apart spacers 120 on the light-receiving surface 101 of the cell 100, it can not only play an isolating and protecting role on the light-receiving surface 101 of the cell 100 during the stacking process of the cell 100, and prevent the light-receiving surface 101 of the cell 100 from being scratched by the electrode 110 on the adjacent cell 100, but also reduce the shielding of the light-receiving surface 101 of the cell 100, and improve the conversion efficiency of the cell 100. In addition, by setting the extension direction of at least part of the spacers 120 to intersect with the extension direction of the electrode 110, it is ensured that when the cell 100 is stacked, there are always part of the spacers 120 that can form an isolating support for the electrode 110 on the adjacent cell 100, and avoid the spacers from being offset into the gap between the electrodes due to the offset of the cell, thereby further improving the isolating and protecting role on the light-receiving surface 101.

[0135] It should be noted that the photovoltaic assembly of the embodiment of the present application may include the solar cell 100 in any of the above embodiments. The specific structure of the solar cell 100 can be found in the above content, and the embodiment of the present application will not be repeated here.

[0136] Optionally, the embodiment of the present application also provides another photovoltaic module, including the solar cell 100 in the above embodiment. In the embodiment of the other photovoltaic module, the isolating member 120 is made of a material that is easy to vaporize (a low boiling point material), such as polyvinyl alcohol (PVA), the melting point of PVA is about 100°C, and the boiling point of PVA is about 180°C. When the cell is contained and transported in a room temperature environment, since the ambient temperature is lower than the melting point of the isolating member 120, the shape of the isolating member 120 is relatively stable, and it can play an effective role in isolating and protecting the light-receiving surface 101 of the cell 100. When it is necessary to remove the isolating member 120, the solar cell 100 can be heated so that the temperature of the cell 100 reaches above the boiling point of the isolating member 120, so that the isolating member 120 is vaporized and removed. For example, if PVA material is used, the subsequent heating temperature can be greater than 180°C.

[0137] However, the heating process does not completely vaporize the isolation member 120. Some of the isolation member 120 will remain on the surface of the cell body 100a to form a number of isolation marks arranged at intervals. The isolation marks can be used as marking points for subsequent processes. For example, the isolation marks can be used as marking points when preparing a polymer layer on the surface of the cell 100. The polymer layer can be, for example, an EVA layer or a POE layer or a composite layer of the two. For another example, the cell 100, polymer layer, glass, etc. need to be subjected to a hot pressing process to form a photovoltaic module. The isolation marks can be used as marking points during the hot pressing process.

[0138] In the embodiment of the other photovoltaic module, by setting a plurality of spaced-apart spacers 120 on the light-receiving surface 101 of the cell 100, the light-receiving surface 101 of the cell 100 can be isolated and protected during the stacking of the cell 100, thereby preventing the light-receiving surface 101 of the cell 100 from being scratched by the electrode 110 on the adjacent cell 100, and at the same time, the light-receiving surface 101 of the cell 100 can be shielded, thereby improving the conversion efficiency of the cell 100. In addition, by setting the extension direction of at least part of the spacers 120 to intersect with the extension direction of the electrode 110, it is ensured that when the cell 100 is stacked, there are always part of the spacers 120 that can form an isolation support for the electrode 110 on the adjacent cell 100, thereby preventing the spacers from shifting into the gap between the electrodes due to the shift of the cell, thereby further improving the isolation and protection of the light-receiving surface 101. In addition, the isolation member 120 is made of a material that is easily vaporized (a low-boiling point material). Before forming the photovoltaic module, the isolation member 120 can be removed by heating and a number of isolation marks arranged at intervals can be left. The isolation marks can be used as marking points in the module process.

[0139] Furthermore, the isolation trace may be formed by a plurality of dot traces and / or a plurality of line traces arranged in sequence along a preset direction, wherein the preset direction is the extension direction of the isolation trace; or, the isolation trace is a continuously extending strip trace.

[0140] It can be understood that the isolation trace is formed by further processing of the isolation member 120 , and thus the structural shape of the isolation trace corresponds to the structural shape of the isolation member 120 .

[0141] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0142] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A solar cell, characterized in that: include: The cell body comprises a light-receiving surface and a backlight surface, the backlight surface is provided with electrodes, the light-receiving surface is provided with a plurality of spaced-apart insulating members, and the extension direction of at least some of the insulating members is staggered with the extension direction of the electrodes.

2. The solar cell according to claim 1, characterized in that: The isolating element is formed by a plurality of dot-shaped protrusions and / or a plurality of linear protrusions arranged in sequence and at intervals along a preset direction, and the preset direction is the extending direction of the isolating element; or, the isolating element is a continuously extending strip-shaped protrusion.

3. The solar cell according to claim 1, characterized in that: An extension direction of at least part of the isolation member forms a first angle with an extension direction of the electrode, and the first angle ranges from 30° to 150°.

4. The solar cell according to any one of claims 1 to 3, characterized in that: The isolation member includes a plurality of first isolation members arranged at intervals, the extension directions of the plurality of first isolation members are consistent, and the extension direction of the first isolation member is staggered with the extension direction of the electrode.

5. The solar cell according to claim 4, characterized in that: The isolating member further includes a plurality of second isolating members, the plurality of second isolating members are arranged at intervals, and the extension directions of the second isolating members are respectively intersected with the extension directions of the first isolating members and the extension directions of the electrodes.

6. The solar cell according to claim 5, characterized in that: An extension direction of the first isolating member and an extension direction of the second isolating member form a second angle, and the range of the second angle is 60°-180°.

7. The solar cell according to claim 5, characterized in that: The light receiving surface includes four areas, namely the first area, the second area, the third area and the fourth area; the first area and the second area are arranged along the first direction, and the third area and the fourth area are arranged along the first direction; the first area and the third area are arranged along the second direction, and the second area and the fourth area are arranged along the second direction, and the first direction is perpendicular to the second direction; the first isolation member is provided in the second area and the third area, and the second isolation member is provided in the first area and the fourth area.

8. The solar cell according to claim 7, characterized in that: The isolation elements in two adjacent areas are connected to each other; or, a blank area is provided between two adjacent areas.

9. The solar cell according to claim 7, characterized in that: The plurality of isolation members on the light receiving surface are distributed in an axisymmetric manner.

10. The solar cell according to claim 5, characterized in that: The isolating member further includes a third isolating member, which is disposed around at least a portion of the circumferential edge of the light receiving surface, and the third isolating member is connected to the first isolating member and / or the second isolating member.

11. The solar cell according to claim 10, characterized in that: The third isolating member is disposed around a portion of the circumferential edge of the light receiving surface to form a partial edge sealing structure.

12. The solar cell according to claim 10, characterized in that: The battery cell body has four side edges, each of the side edges is correspondingly provided with the third isolating member, and the distance from the third isolating member to the corresponding side edge is less than or equal to 5 mm.

13. The solar cell according to any one of claims 1 to 3, characterized in that: At least part of the isolation members is enclosed to form an annular structure.

14. The solar cell according to claim 13, characterized in that: The light receiving surface is provided with a plurality of the annular structures, and the plurality of the annular structures are arranged in an array.

15. The solar cell according to any one of claims 1 to 3, characterized in that: The light receiving surface is provided with a plurality of regions, each of the regions is provided with the isolation member, and the extension directions of the isolation members in two adjacent regions are staggered.

16. The solar cell according to claim 1, characterized in that: The backlight surface is provided with a bus electrode and a collector electrode connected to each other, and the electrode refers to the one with a higher height between the bus electrode and the collector electrode; Alternatively, the backlight surface is only provided with a collector electrode, and the electrode refers to the collector electrode.

17. A photovoltaic module, characterized in that: Comprising the solar cell sheet as described in any one of claims 1 to 16.

18. A photovoltaic module, characterized in that: including a solar cell sheet and a polymer layer; The solar cell comprises: a cell body, the cell body having a light-receiving surface and a backlight surface, the backlight surface being provided with an electrode, the light-receiving surface being provided with a plurality of isolation marks arranged at intervals, and the extension direction of at least part of the isolation marks being intersected with the extension direction of the electrodes; The polymer layer is disposed on the light-receiving surface of the battery cell body, and the polymer layer covers the isolation trace.

19. The photovoltaic module according to claim 18, characterized in that: The isolation trace is formed by a plurality of dot traces and / or a plurality of line traces arranged in sequence along a preset direction, and the preset direction is the extension direction of the isolation trace; or, the isolation trace is a continuously extending strip trace.

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