A solar cell and photovoltaic module

Abstract

The present application discloses a solar cell and a photovoltaic module, wherein the solar cell comprises: a cell body, wherein the cell body has a light-receiving surface and a backlight surface, wherein a plurality of electrodes arranged in sequence along a first direction are arranged in the backlight surface, and at least one of the light-receiving surface and the backlight surface is provided with a plurality of first protective members arranged in sequence along a first direction, wherein the maximum dimension of the orthographic projection of the first protective member on the backlight surface along the first direction is greater than the spacing between two adjacent electrodes. Furthermore, when stacked, the first protective member plays an isolating and supporting role between two adjacent cells, and can reduce the shielding of the light received by the cell. In addition, by setting the maximum dimension of the orthographic projection of the first protective member on the backlight surface along the first direction to be greater than the spacing between two adjacent electrodes, it is possible to avoid the first protective member on the surface of the cell being embedded between the electrodes on the surface of another cell when stacked and failing to play an effective supporting role, thereby reducing the risk of the light-receiving surface of the cell being scratched by the electrode.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic technology, and specifically relates to a solar cell and a photovoltaic module. Background Art

[0002] In a back-contact cell, by placing both the PN junction and the metal electrode on the backlight side of the cell, the grid electrode is prevented from blocking the light-receiving side of the cell, which can maximize the use of incident light and reduce optical losses, thereby achieving the purpose of improving the conversion efficiency of the solar cell.

[0003] In the production process of back-contact batteries, after the production of battery cells is completed, multiple battery cells need to be stacked so that they can be transported to the subsequent lamination process using a material box. When stacking battery cells, in order to avoid scratches between battery cells, isolation paper is usually used to block the two adjacent battery cells. However, the isolation paper isolation method needs to be removed before lamination, which is a cumbersome operation process and has a high cost of using isolation paper. Utility Model Content

[0004] The present application aims to provide a solar cell and a photovoltaic module, which can solve the problem that the isolation paper used in the related art needs to be removed before lamination, the operation process is relatively cumbersome, and the cost of using the isolation paper is high.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] 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 a plurality of electrodes arranged in sequence along a first direction, at least one of the light-receiving surface and the backlight surface being provided with a plurality of first protective members arranged at intervals, the maximum dimension of the orthographic projection of the first protective member on the backlight surface along the first direction being greater than the spacing between two adjacent electrodes.

[0007] Optionally, the maximum dimension of the orthographic projection of the first protective member on the backlight surface along the first direction is D1, and the distance between two adjacent electrodes is D2, satisfying: 1<D1 / D2≤2.

[0008] Optionally, along the first direction, a distance between two adjacent first protective members is L, satisfying: L≤8 mm.

[0009] Optionally, an orthographic projection of the first protective member on the backlight surface at least partially overlaps with the electrode.

[0010] Optionally, the light-receiving surface further includes a plurality of second protective members, which are staggered with the first protective members, and the orthographic projection area of ​​the second protective members on the light-receiving surface is smaller than the orthographic projection area of ​​the first protective members on the light-receiving surface.

[0011] Optionally, along a direction perpendicular to the light-receiving surface, the first protective member and the second protective member have the same height.

[0012] Optionally, along the first direction, at least one second protecting member is provided between two adjacent first protecting members.

[0013] Optionally, the second protective member is at least one of a point-shaped protrusion, a ring-shaped protrusion and a strip-shaped protrusion.

[0014] Optionally, a plurality of the first protective members are arranged in an array; and / or a plurality of the second protective members are arranged in an array.

[0015] Optionally, the backlight surface is also provided with an insulating rubber layer, which covers at least a portion of the electrode, and the orthographic projection of the first protective member on the backlight surface is staggered with the insulating rubber layer; and / or the orthographic projection of the second protective member on the backlight surface is staggered with the insulating rubber layer.

[0016] Optionally, the first protective member is at least one of a point-shaped protrusion, a ring-shaped protrusion and a strip-shaped protrusion; and / or the first protective member is arranged on the light-receiving surface.

[0017] In a second aspect, an embodiment of the present application provides a photovoltaic module, comprising any of the solar cell sheets described above.

[0018] In the embodiment of the present application, a plurality of electrodes arranged in sequence along a first direction are provided on the backlight surface of the battery cell body, and a plurality of first protective members arranged in sequence along a first direction are provided on at least one of the light-receiving surface and the backlight surface of the battery cell body, and then when the battery cells are stacked, the plurality of first protective members are used to

[0019] The protective member can play the role of isolating and supporting two adjacent battery cells. At the same time, the spacing of the first protective members can reduce the shielding of the light received by the battery cells. In addition, by setting the maximum size of the orthographic projection of the first protective member on the backlight surface along the first direction to be larger than the spacing between two adjacent electrodes, it is avoided that the first protective member on the surface of the battery cell is embedded between the electrodes on the surface of another battery cell when stacked and cannot play an effective supporting role, thereby reducing the risk of the light-receiving surface of the battery cell being scratched by the electrodes.

[0020] 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

[0021] 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:

[0022] Figure 1 is a cross-sectional view of a solar cell according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of stacking solar cells according to an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of a solar cell according to an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of another solar cell according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of another solar cell according to an embodiment of the present application;

[0027] Figure 6 is a schematic diagram of another solar cell according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 10: battery cell; 11: battery cell body; 11a: light-receiving surface; 11b: backlight surface; 20: electrode; 30: first protective member; 40: second protective member; X: first direction. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, the solar cell 10 includes a cell body 11, the cell body 11 has a light-receiving surface 11a and a backlight surface 11b, the backlight surface 11b is provided with a plurality of electrodes 20 arranged in sequence along a first direction X, at least one of the light-receiving surface 11a and the backlight surface 11b is provided with a plurality of first protective members 30 arranged at intervals, and the maximum dimension of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X is greater than the spacing between two adjacent electrodes 20.

[0036] In the embodiment of the present application, a plurality of electrodes 20 arranged in sequence along the first direction X are provided on the backlight surface 11b of the battery cell body 11. A plurality of first protective members 30 arranged in sequence are provided on at least one of the light-receiving surface 11a and the backlight surface 11b of the battery cell body 11. Thus, when the battery cells 10 are stacked, the plurality of first protective members 30 can be used to isolate and support two adjacent battery cells 10. At the same time, the plurality of first protective members 30 arranged in sequence can reduce the shielding of the light received by the battery cells. In addition, by setting the maximum size of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X to be greater than the spacing between two adjacent electrodes 20, it is avoided that the first protective member 30 on the surface of the battery cell 10 is embedded between the electrodes 20 on the surface of another battery cell 10 during stacking and cannot play an effective supporting role, thereby reducing the risk of the light-receiving surface 11a of the battery cell 10 being scratched by the electrode 20.

[0037] The solar cell 10 (hereinafter referred to as the cell 10) includes a cell body 11, and the cell body 11 has a light-receiving surface 11a and a backlight surface 11b. The light-receiving surface 11a is a side of the cell 10 that receives light, and the backlight surface 11b is arranged opposite to the light-receiving surface 11a. The cell 10 can be set as a back-contact solar cell 10. In the back-contact solar cell 10, the electrodes 20 are all arranged on the backlight surface 11b of the cell 10, and the electrodes 20 include a positive electrode and a negative electrode.

[0038] Specifically, the electrode 20 in the embodiment of the present application can be a main grid line or a fine grid line provided on the backlight surface 10b. Usually, when two battery cells 10 are stacked up and down, the main grid line or the fine grid line will be supported between the two battery cells 10 as a supporting grid line, and the supporting grid line can be set as the electrode 20. Of course, in practical applications, the electrode 20 can be determined according to the design structure of the main grid line and the fine grid line in the battery cell 10, and those skilled in the art can flexibly set it according to the actual situation, and the embodiment of the present application does not limit this.

[0039] Furthermore, a plurality of first protective members 30 arranged at intervals may be provided on at least one of the light-receiving surface 11a and the backlight surface 11b of the cell body 11. Preferably, a plurality of first protective members 30 may be provided on the light-receiving surface 11a of the cell body 11. The following description will be made by taking the first protective member 30 provided on the light-receiving surface 11a of the cell body 11 as an example. When the first protective member 30 is provided on the backlight surface 11b, the principle is the same or similar, and will not be described in detail here.

[0040] In a specific application, a plurality of first protective members 30 arranged at intervals are provided on the light-receiving surface 11a of the cell body 11, and a plurality of electrodes 20 are provided on the backlight surface 11b of the cell body 11, and the plurality of electrodes 20 are arranged at intervals along the first direction X. The plurality of electrodes 20 may be arranged in parallel.

[0041] Furthermore, the light-receiving surface 11a and the backlight surface 11b of the cell body 11 can be regarded as two parallel planes. In the direction perpendicular to the backlight surface 11b, each first protective member 30 is projected on the backlight surface 11b to form a projection pattern. The length dimension of the projection pattern along the arrangement direction of the electrodes 20 (that is, along the first direction X) can be measured, and multiple length dimension values ​​can be obtained by measuring, and the maximum value of the multiple length dimension values ​​is taken as the maximum dimension of the projection pattern along the first direction X, that is, the maximum dimension D1 of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X. Accordingly, along the first direction X, the spacing between two adjacent electrodes 20 is D2, and D1>D2 is set.

[0042] It is understandable that in the production process of solar cells, it is usually necessary to stack and store multiple cells 10, and usually a material box is used to hold the cells 10 to achieve storage and transportation of the cells 10. When stacking multiple cells 10, in order to prevent the light-receiving surface 11a of one cell 10 from directly contacting the battery on another cell 10, which may cause the electrode 20 to cause friction scratches on the light-receiving surface 11a of the cell 10.

[0043] In practical applications, isolation paper is usually used to isolate and protect two adjacent battery cells 10. However, the isolation paper needs to be removed before the next process. Not only is the operation more cumbersome, but during the removal of the isolation paper, the debris dropped by the isolation paper is easy to adhere to the surface of the battery cell 10, affecting the quality of the laminate. In addition, the isolation paper is a consumable part and has a high cost of use.

[0044] In the related art, a layer of isolation film is directly formed on the light-receiving surface 11a of the cell 10, so that the isolation film is used to isolate and protect the light-receiving surface 11a of the cell 10, and there is no need to remove the isolation film in subsequent processing, which helps to simplify the operation process. However, the use of this method of setting the isolation film will affect the light reception of the light-receiving surface 11a due to the poor light transmittance of the isolation film, thereby reducing the conversion efficiency of the photovoltaic module.

[0045] To this end, in the embodiment of the present application, a plurality of first protective members 30 arranged at intervals are provided on the light-receiving surface 11a of the battery cell body 11, so that when the battery cells 10 are stacked, the first protective members 30 can be used to

[0046] The isolation support 30 is provided between two adjacent cells 10 to isolate and protect the light-receiving surface 11a of the cell 10. Compared with the related art in which the isolation film is provided on the entire surface, the coverage area of ​​the light-receiving surface 11a of the cell 10 can be reduced, thereby reducing the light shielding rate of the light-receiving surface 11a. On the premise of isolating and protecting the light-receiving surface 11a, the conversion efficiency of the cell 10 can be effectively improved.

[0047] Furthermore, if Figure 2 As shown, the maximum dimension D1 of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X is set to be greater than the spacing D2 between two adjacent electrodes 20. In this way, when two battery cells 10 are stacked, the first protective member 30 in one of the battery cells 10 can be prevented from directly falling between two adjacent electrodes 20 on the other battery cell 10, thereby ensuring that the first protective member 30 can always be isolated and supported on the electrode 20 of the other battery cell 10 during the stacking process, thereby effectively reducing the risk of the light-receiving surface 11a of the battery cell 10 being directly in contact with the electrode 20 of another battery cell 10 and being scratched by friction.

[0048] In some embodiments, the first protective member 30 can be made of transparent materials, for example, photosensitive adhesive, polyolefin elastomer (POE), ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), insulating adhesive, hot melt adhesive and other transparent materials.

[0049] It can be understood that in the photovoltaic module preparation process, a packaging film is usually set on both sides of the battery cell 10. The preparation material of the first protective component 30 can be set to be the same as or similar to the material of the packaging film, and then during lamination, it can be directly and / or laminated into the interior of the photovoltaic module, which can not only simplify the operating steps, but also reduce the impact of the setting of the first protective component 30 on the light absorption of the battery cell 10.

[0050] Of course, the first protective member 30 may also be made of other types of transparent materials, which is not limited in the embodiment of the present application.

[0051] Alternatively, if Figure 3 As shown, the first protective member 30 is a dot-shaped protrusion. By setting the first protective member 30 as a dot-shaped protrusion and making the maximum dimension of the orthographic projection of the dot-shaped protrusion on the backlight surface 11b along the first direction X larger than the spacing between two adjacent electrodes 20, when the battery cells 10 are stacked, the dot-shaped protrusion can be used to form an isolation support for the electrodes 20 of adjacent battery cells 10, and at the same time, it is also convenient for actual design and processing.

[0052] Optionally, as shown in FIG. Figure 4 and Figure 5 As shown, the first protective member 30 is an annular protrusion.

[0053] A protective member 30 is configured as an annular protrusion, and the maximum dimension of the positive projection of the annular protrusion on the backlight surface 11b along the first direction X is greater than the spacing between two adjacent electrodes 20. In this way, when the battery cells 10 are stacked, the annular protrusion can be used to form an isolation support for the electrodes 20 of adjacent battery cells 10. At the same time, the use of an annular structure can also reduce the amount of raw materials required to prepare the first protective member 30.

[0054] In some embodiments, the projection shape of the first protective member 30 on the backlight surface 11b includes but is not limited to a circular ring, an elliptical ring, a diamond ring, a rectangular ring, a square ring, a trapezoidal ring, etc. Of course, the first protective member 30 can also be set as other annular structures, which can be flexibly set according to actual conditions, and the embodiments of the present application are not limited to this.

[0055] Alternatively, if Figure 6 As shown, the first protective member 30 is a strip-shaped protrusion. By setting the first protective member 30 as a strip-shaped protrusion and setting the extension direction of the strip-shaped protrusion to be staggered with the extension direction of the electrode 20, the maximum dimension of the orthographic projection of the strip-shaped protrusion on the backlight surface 11b along the first direction X can be made larger than the spacing between two adjacent electrodes 20, and then when the battery cells 10 are stacked, the annular protrusion can be used to contact the electrode 20 on the adjacent battery cells 10 to form an isolation support function.

[0056] Alternatively, if Figure 2 As shown, the maximum dimension of the orthographic projection of the first protection member 30 on the backlight surface 11 b along the first direction X is D1 , and the distance between two adjacent electrodes 20 is D2 , satisfying: 1<D1 / D2≤2.

[0057] In the embodiment of the present application, by setting the value range of the ratio D1 / D2 between the maximum dimension D1 of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X and the spacing D2 between two adjacent electrodes 20, it can be ensured that the first protective member 30 can form an effective isolation and support effect on the electrodes 20 on adjacent battery cells 10 during stacking, and at the same time, it is avoided that the size of the first protective member 30 is set too large, thereby increasing the production cost and increasing the shielding of the light-receiving surface 11a of the battery cell 10.

[0058] Exemplarily, the ratio D1 / D2 between the maximum dimension D1 of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X and the spacing D2 between two adjacent electrodes 20 can be set to any value such as 1.1, 1.3, 1.5, 1.6, 1.8, 2.0, or a range between any two values.

[0059] Alternatively, if Figure 3 As shown, along the first direction X, the distance between two adjacent first protection members 30 is L, satisfying: L≤8mm.

[0060] It is understandable that since the battery cell 10 generally has a certain degree of flexibility,

[0061] When the battery cells 10 are stacked, if the distance between two adjacent first protective members 30 is too large, part of the battery cell 10 located between the two first protective members 30 will bend under the action of gravity, which may easily cause the bent part of the battery cell 10 to contact the electrode 20 of another battery cell 10 and cause the light-receiving surface 11a of the battery cell 10 to be scratched.

[0062] In the embodiment of the present application, a reasonable value range of the distance L between two adjacent first protection members 30 along the first direction X is set to avoid the distance between the two first protection members 30 being too large to effectively isolate and protect the battery cell 10 .

[0063] Exemplarily, the distance L between two adjacent first protective members 30 can be set to any value such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or a range between any two values.

[0064] Alternatively, if Figure 1 As shown, the orthographic projection of the first protection member 30 on the backlight surface 11 b at least partially overlaps with the electrode 20 .

[0065] In the embodiment of the present application, by setting the orthographic projection of the first protective member 30 on the backlight surface 11b to at least partially overlap with the electrode 20, when two battery cells 10 are stacked, it can be ensured that the first protective member 30 on one of the battery cells 10 can contact the electrode 20 on the other battery cell 10, so as to play an isolation and support role between the two battery cells 10.

[0066] Alternatively, if Figure 1 and Figure 3 As shown, the light receiving surface 11a also includes a second protective member 40, which is staggered with the first protective member 30, and the orthographic projection area of ​​the second protective member 40 on the light receiving surface 11a is smaller than the orthographic projection area of ​​the first protective member 30 on the light receiving surface 11a.

[0067] In the embodiment of the present application, a second protective member 40 is further provided on the light-receiving surface 11a so that the second protective member 40 can be used to strengthen the protection of the spacing area of ​​the first protective member 30. In this way, through the cooperation of the first protective member 30 and the second protective member 40, the light-receiving surface 11a of the battery cell 10 can be isolated and protected to the greatest extent while using less raw materials, which not only satisfies the protection of the battery cell 10, but also reduces the production cost.

[0068] In some embodiments, Figures 3 to 6 As shown, the second protective member 40 can be set as at least one of a dot-shaped protrusion, a ring-shaped protrusion and a strip-shaped protrusion, so that the second protective member 40 can not only play a role in strengthening the protection of the surface of the battery cell 10, but also facilitate actual design and processing.

[0069] Of course, the second protective member 40 can also be set to other shapes and structures. Those skilled in the art can flexibly set it according to actual needs, and the embodiments of the present application are not limited to this.

[0070] In some embodiments, the second protective member 40 can be made of a transparent material, for example, a photosensitive adhesive, a polyolefin elastomer (POE), an ethylene-vinyl acetate copolymer (EVA), a polyethylene terephthalate (PET), an insulating adhesive, a hot melt adhesive, etc. Of course, the second protective member 40 can also be made of other types of transparent materials, which is not limited in the present embodiment of the application.

[0071] The second protective member 40 and the first protective member 30 may be made of the same material or different materials. Those skilled in the art may flexibly configure the materials according to actual needs, and the embodiments of the present application do not limit this.

[0072] Alternatively, if Figure 1 As shown, along the direction perpendicular to the light receiving surface 11 a , the heights of the first protective member 30 and the second protective member 40 are equal.

[0073] In the embodiment of the present application, the heights of the first protective member 30 and the second protective member 40 are set to be equal so that when the battery cells 10 are stacked, the first protective member 30 and the second protective member 40 can simultaneously contact the grid lines or the backlight surface 11b of the adjacent battery cells 10, thereby enhancing the isolation and protection effect on the surface of the battery cells 10.

[0074] Of course, the heights of the first protective member 30 and the second protective member 40 may also be set to be unequal, and may be determined according to the arrangement structure of the electrodes 20 on the surface of the battery cell 10 , which is not limited in the embodiment of the present application.

[0075] Alternatively, if Figure 3 As shown, along the first direction X, at least one second protecting member 40 is disposed between adjacent first protecting members 30 .

[0076] It is understandable that if the first protective members 30 on the light-receiving surface 11a of the cell 10 are arranged too densely, it will not only increase the production cost, but also form a large shielding on the light-receiving surface 11a. If the first protective members 30 are arranged too sparsely, under the action of gravity, the portion of the cell 10 between two adjacent first protective members 30 will produce flexible deformation, which will cause the deformed portion of the cell 10 to contact the electrode 20 on the adjacent cell 10, causing the surface of the cell 10 to be scratched.

[0077] To this end, in the embodiment of the present application, at least one second protective member 40 is provided between adjacent first protective members 30, so that the distance between two adjacent first protective members 30 can be appropriately increased.

[0078] At the same time, since at least one second protective member 40 is disposed between adjacent first protective members 30 , the second protective member 40 can be used to effectively isolate and protect the portion of the battery cell 10 located between two adjacent first protective members 30 .

[0079] Among them, along the first direction X, the number and position of the second protection members 40 between adjacent first protection members 30 can be flexibly set according to actual conditions, and the embodiment of the present application does not limit this.

[0080] In some embodiments, a second protective member 40 may be provided between two adjacent first protective members 30 along the extension direction of the electrode 20 . Similarly, the second protective member 40 may enhance the protection of the battery cell 10 between two adjacent first protective members 30 .

[0081] Alternatively, if Figure 3 As shown, a plurality of first protective members 30 are arranged in an array. By arranging a plurality of first protective members 30 in an array, the uniformity of the distribution of the first protective members 30 on the surface of the cell 10 is improved, thereby ensuring that the first protective members 30 can effectively protect different positions of the light-receiving surface 11a of the cell 10.

[0082] Alternatively, if Figure 3 As shown, a plurality of second protective members 40 are arranged in an array. By arranging a plurality of second protective members 40 in an array, the uniformity of the distribution of the second protective members 40 on the surface of the battery cell 10 is improved, thereby enhancing the protective effect of the second protective members 40 on the light-receiving surface 11a of the battery cell 10.

[0083] Optionally, the backlight surface 11b of the battery cell body 11 is also provided with an insulating adhesive layer, which covers at least part of the electrode 20, and the orthographic projection of the first protective member 30 on the backlight surface 11b is staggered with the insulating adhesive layer; and / or the orthographic projection of the second protective member 40 on the backlight surface 11b is staggered with the insulating adhesive layer.

[0084] Specifically, in the back-contact battery cell 10, the positive and negative electrodes are both arranged on the backlight surface 11b of the battery cell 10. When multiple battery cells 10 are connected to form a battery string, it is usually necessary to use a welding ribbon to weld the electrodes 20 in two adjacent battery cells. In order to reduce the risk of short circuit between the positive and negative electrodes when the welding ribbon is offset, an insulating rubber layer is usually provided on the backlight surface 11b, and the insulating rubber layer will partially cover the electrode 20 to play an insulating isolation role between the positive and negative electrodes.

[0085] In a specific application, when an insulating adhesive layer is provided on the backlight surface 11b of the battery cell 10, the insulating adhesive layer is provided at a position higher than the protrusion height of the backlight surface 11b. When the battery cells 10 are stacked, if the first protective member 30 and / or the second protective member 40 contacts the insulating adhesive layer, the two battery cells 10 may be

[0086] If the intervals between the cells 10 are too large, it is easy to cause greater deformation of the unsupported parts of the cells.

[0087] To this end, in the embodiment of the present application, the orthographic projection of the first protective member 30 and / or the second protective member 40 on the backlight surface 11b is staggered from the insulating adhesive layer. In this way, when the battery cells 10 are stacked, it can be ensured that the first protective member 30 and / or the second protective member 40 in one of the battery cells 10 does not contact the insulating adhesive layer on another battery cell 10, which helps to reduce the spacing between the two battery cells 10.

[0088] It should be noted that the position and structure of the insulating adhesive layer disposed on the backlight surface 11 b of the battery cell 10 can refer to the technical content in the relevant technology, and the embodiment of the present application does not limit this.

[0089] Optionally, an embodiment of the present application further provides a photovoltaic assembly, comprising the solar cell 10 in the above embodiment.

[0090] In the embodiment of the present application, a plurality of electrodes 20 arranged in sequence along the first direction X are arranged on the backlight surface 11b of the battery cell body 11. By setting a plurality of first protective members 30 arranged in sequence along the first direction X on at least one of the light-receiving surface 11a and the backlight surface 11b of the battery cell body 11, when the battery cells 10 are stacked, the plurality of first protective members 30 can play the role of isolating and supporting between two adjacent battery cells 10. At the same time, the plurality of first protective members 30 arranged in sequence along the first direction X can reduce the shielding of the light received by the battery cells. In addition, by setting the maximum size of the orthographic projection of the first protective member 30 on the backlight surface 11b along the first direction X to be greater than the spacing between two adjacent electrodes 20, it is avoided that the first protective member 30 on the surface of the battery cell 10 is embedded between the electrodes 20 on the surface of another battery cell 10 during stacking and cannot play an effective supporting role, thereby reducing the risk of the light-receiving surface 11a of the battery cell 10 being scratched by the electrode 20.

[0091] It should be noted that the photovoltaic assembly in the embodiment of the present application may include the solar cell in any of the above embodiments. The specific structure of the solar cell can be found in the above content, and the embodiment of the present application will not be repeated here.

[0092] 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.

[0093] 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: A battery cell body, wherein the battery cell body has a light-receiving surface and a backlight surface, the backlight surface is provided with a plurality of electrodes arranged in sequence along a first direction, at least one of the light-receiving surface and the backlight surface is provided with a plurality of first protective members arranged in sequence, and the maximum dimension of the orthographic projection of the first protective member on the backlight surface along the first direction is greater than the spacing between two adjacent electrodes.

2. The solar cell according to claim 1, characterized in that: The maximum dimension of the orthographic projection of the first protection member on the backlight surface along the first direction is D1, and the distance between two adjacent electrodes is D2, which satisfies: 1<D1 / D2≤2.

3. The solar cell according to claim 1, characterized in that: Along the first direction, a distance between two adjacent first protection members is L, satisfying: L≤8mm.

4. The solar cell according to claim 1, characterized in that: The orthographic projection of the first protection member on the backlight surface at least partially overlaps with the electrode.

5. The solar cell according to any one of claims 1 to 4, characterized in that: The light-receiving surface also includes a plurality of second protective members, which are staggered with the first protective members, and the orthographic projection area of ​​the second protective members on the light-receiving surface is smaller than the orthographic projection area of ​​the first protective members on the light-receiving surface.

6. The solar cell according to claim 5, characterized in that: Along the first direction, at least one second protecting member is disposed between two adjacent first protecting members; and / or, along a direction perpendicular to the light-receiving surface, the first protective member and the second protective member have the same height; And / or, the second protective member is at least one of a point-shaped protrusion, a ring-shaped protrusion and a strip-shaped protrusion.

7. The solar cell according to claim 5, characterized in that: A plurality of the first protective members are arranged in an array; and / or a plurality of the second protective members are arranged in an array.

8. The solar cell according to claim 5, characterized in that: The backlight surface is also provided with an insulating rubber layer, which covers at least a portion of the electrode, and the orthographic projection of the first protective member on the backlight surface is staggered with the insulating rubber layer; and / or the orthographic projection of the second protective member on the backlight surface is staggered with the insulating rubber layer.

9. The solar cell according to claim 1, characterized in that: The first protective member is at least one of a dot-shaped protrusion, a ring-shaped protrusion and a strip-shaped protrusion; and / or the first protective member is arranged on the light-receiving surface.

10. A photovoltaic module, characterized in that: The invention comprises a solar cell according to any one of claims 1 to 9.

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