A photovoltaic module

Abstract

This application discloses a photovoltaic module, belonging to the field of photovoltaic module technology. The photovoltaic module includes a solar cell; a solder ribbon extending along a first direction and connected to the solar cell; a first strip extending along the first direction and covering the solar cell; and a second strip extending along a second direction and connected to the edge of the solar cell, the second direction being perpendicular to the first direction; wherein the first strip and the second strip cover the opposite side of the solder ribbon.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, specifically to a photovoltaic module. Background Technology

[0002] BC modules, also known as full back contact crystalline silicon photovoltaic modules, are currently considered to have the best appearance among photovoltaic modules. During manufacturing, tape of the same color as the module's exterior is typically applied between adjacent cells or along the edge of the outermost cell to achieve a uniform color appearance.

[0003] In existing technologies, infrared welding is typically used to weld solder strips onto the surface of the solar cell in order to collect the current generated by the solar cell through the solder strips.

[0004] However, the infrared welding process can easily cause the solar cells to warp, leading to changes in the spacing between the solar cells and problems such as solar cell stack breakage and welding failure of the welding strip. Summary of the Invention

[0005] This application discloses a photovoltaic module to solve, or at least partially solve, the problems existing in the prior art, such as cell warping, which leads to changes in cell spacing, cell stacking breakage, and welding failure.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] This application discloses a photovoltaic module, the photovoltaic module including a solar cell; a solder ribbon extending along a first direction and connected to the solar cell; a first strip extending along the first direction and covering the solar cell; and a second strip extending along a second direction and connected to the edge of the solar cell, the second direction being perpendicular to the first direction; wherein the first strip and the second strip cover the opposite side of the solder ribbon.

[0008] In this application, the first strip extends along a first direction and covers the solar cell. The first strip fixes the solder ribbon to the surface of the solar cell, making the solar cell less prone to warping and improving the dimensional stability of the solar cell.

[0009] Furthermore, the second strip in this application extends along a second direction and connects to the edge of the solar cell. The second strip blocks the gap between adjacent solar cells, thereby improving the uniformity of the photovoltaic module's appearance and resulting in a better overall look.

[0010] Furthermore, the first and second strips in this application cover the opposite side of the solder strip. Specifically, the first strip connects to the side of the solder strip away from the solar cell, thus connecting the solder strip to the solar cell and improving the dimensional stability of the solar cell, reducing the likelihood of warping. The second strip connects to the side of the solder strip closer to the solar cell and is located between two adjacent solar cells. This not only masks the gap between adjacent solar cells, improving the appearance of the photovoltaic module, but also secures adjacent solar cells, preventing changes in the gap between them, reducing the amount of solder strip expansion and contraction, and improving the reliability of the photovoltaic module.

[0011] Optionally, the first strip covers the side of the solder strip away from the solar cell, and the second strip covers the side of the solder strip close to the solar cell. In this application, the first strip is connected to the side of the solder strip away from the solar cell to connect the solder strip to the solar cell, resulting in better dimensional stability of the solar cell and reducing the likelihood of warping. The second strip is connected to the side of the solder strip close to the solar cell, fixing adjacent solar cells in place, thereby preventing changes in the gap between adjacent solar cells, reducing the amount of solder strip expansion and contraction, and improving the reliability of the photovoltaic module.

[0012] Optionally, the first strip and the second strip have a first gap on the plane where the solar cell is located. During the lamination process of the photovoltaic module, if the first strip and the second strip overlap on the plane where the solar cell is located, the second strip can easily cause the first strip to shift, thereby affecting the reliability of the connection between the solder ribbon and the solar cell, and thus affecting the photoelectric conversion efficiency of the photovoltaic module. The setting of the first gap can improve the reliability of the connection between the solder ribbon and the solar cell, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0013] Optionally, the battery cells include a plurality of cells, which are arranged at intervals along the first direction, wherein, in two adjacent battery cells, there is a first region between the first stripe on one battery cell and the first stripe on the adjacent battery cell, and the first gap is located within the first region.

[0014] Optionally, the second strip passes through the first region along the first direction, with one side of the second strip connected to the edge of one of the battery cells and the other side of the second strip connected to the edge of another adjacent battery cell; the first gap includes two gaps, one gap located between the end of the first strip on one of the battery cells and one side of the second strip, and the other gap located between the end of the first strip on another adjacent battery cell and the other side of the second strip.

[0015] Optionally, the first gap is greater than 1 mm. In this application, the first gap is set to be greater than 1 mm to avoid the second strip overlapping with the first strip during the photovoltaic module lamination process. This prevents the second strip from causing the first strip to shift, affecting the reliability of the connection between the solder ribbon and the solar cell. This results in better reliability and higher photoelectric conversion efficiency for the photovoltaic module.

[0016] Optionally, the photovoltaic module further includes a busbar, which is arranged at intervals with the solar cells along the first direction. A second region exists between the first strip on the solar cell and the busbar, and the first gap is located within this second region. In this application, by placing the first gap within the second region, the first strip is prevented from being pulled by the second strip, thus affecting the reliability of the connection between the solder strip and the solar cell, thereby improving the reliability of the photovoltaic module.

[0017] Optionally, the second strip extends from the back edge of the battery cell to the front of the busbar.

[0018] Optionally, one end of the welding strip is connected to the battery cell, and the other end is connected to the busbar.

[0019] Optionally, the second strip includes a first portion and a second portion, wherein the first portion extends from the back edge of the battery cell to the region between the battery cell and the busbar, and the second portion extends from the front edge of the busbar to the region between the battery cell and the busbar; and the first portion and the second portion at least partially overlap.

[0020] Optionally, the solder strip passes through the overlapping portion of the first portion and the second portion, and the overlapping portion of the first portion and the second portion is located on the same side of the solder strip.

[0021] Optionally, the first strip and the first portion are located on different sides of the solder strip; on the plane where the battery cell is located, the first strip has a first projection, the first portion has a second projection, and the first gap exists between the first projection and the second projection.

[0022] Optionally, the projection of the first strip onto the plane where the battery cell is located at least partially overlaps with the projection of the second strip onto the plane where the battery cell is located.

[0023] Optionally, the battery cells include a plurality of cells, which are arranged at intervals along the first direction, wherein, on the plane where the battery cells are located, the overlapping portion of the first strip and the second strip covers the gap between two adjacent battery cells.

[0024] Optionally, the welding strips include multiple strips, which are arranged at intervals along the second direction; the first strip also includes multiple strips, with at least one first strip corresponding to one welding strip.

[0025] Optionally, the first strip covers the end of the solder strip near the second strip.

[0026] Optionally, the solar cell includes at least two solar cells, which are spaced apart along the first direction; the photovoltaic module further includes a third strip, which connects two adjacent solar cells, the first strip covers the strip of one solar cell, and the third strip covers the strip of another adjacent solar cell; wherein the first gap is located between the third strip and the second strip, and / or the first gap is located between the first strip and the second strip.

[0027] Optionally, the battery cell includes at least two, the at least two battery cells are arranged at intervals along the first direction, the second strip is located between two adjacent battery cells and connected to the edges of the two adjacent battery cells; the first strip covers the solder strip of one battery cell and passes through the second strip to cover the solder strip of another adjacent battery cell.

[0028] Optionally, the solder ribbon is connected to two adjacent solar cells; the first and second strips wrap around the portion of the solder ribbon located between the two adjacent solar cells. In this application, by wrapping the portion of the solder ribbon between the two adjacent solar cells with the second and first strips, the portion of the solder ribbon between the two adjacent solar cells is fixed between the second and first strips, thereby ensuring the stability of the solder ribbon between the two adjacent solar cells, making the solder ribbon less prone to pulling or stretching, preventing connection failure between the solder ribbon and the solar cells, and further improving the reliability of the photovoltaic module.

[0029] Optionally, along the second direction, the distance between two adjacent welding strips is L, the width of the welding strip is a, and the width of the first strip located in the middle region is b2, satisfying 3a≤b2≤L.

[0030] Optionally, along the second direction, the distance between the solder strip closest to the edge of the battery cell and the edge of the battery cell is M, the width of the solder strip is a, and the width of the first strip closest to the edge of the battery cell is b1, satisfying 3a≤b1≤M.

[0031] Optionally, the following condition must be met: 1mm ≤ M ≤ 10mm.

[0032] Optionally, along the second direction, the distance between the first strip closest to the edge of the battery cell and the edge of the battery cell is h1; along the second direction, the distance between the end of the second strip and the edge of the battery cell is h2, satisfying h1 > h2.

[0033] Optionally, along the first direction, the width of the battery cell is f, and the length of the first strip or the third strip is c, satisfying c < f.

[0034] Optionally, the battery cells include n cells, which are arranged at intervals along the first direction; the width of each battery cell is f, the gap between two adjacent battery cells is x, and the length of the first strip is d, satisfying d < n*f + (n-1)*x.

[0035] Optionally, the battery cells include multiple cells, which are arranged at intervals along the first direction, with a gap of x between two adjacent cells, satisfying x≥0.1mm.

[0036] Optionally, along the first direction, the width of the second strip is g, and the distance between the end of the solder strip near the edge of the battery cell and the edge of the battery cell is t, satisfying x+2≤g<2*t+x.

[0037] Optionally, along the first direction, the distance between the end of the first strip near the edge of the battery cell and the edge of the battery cell is s, satisfying 0 < s ≤ t-1.

[0038] Optionally, along the first direction, the width of the second strip covering the edge of the battery cell is w, satisfying 1≤w≤t.

[0039] This application discloses a photovoltaic module, which includes a solar cell; a solder ribbon extending along a first direction and connected to the solar cell; a first strip extending along the first direction and covering the solar cell; and a second strip extending along a second direction and connected to the edge of the solar cell, the second direction being perpendicular to the first direction; wherein the first strip and the second strip cover the opposite side of the solder ribbon.

[0040] In this application, the first strip extends along a first direction and covers the solar cell. The first strip fixes the solder ribbon to the surface of the solar cell, making the solar cell less prone to warping and improving the dimensional stability of the solar cell.

[0041] Furthermore, the second strip in this application extends along a second direction and connects to the edge of the solar cell. The second strip blocks the gap between adjacent solar cells, thereby improving the uniformity of the photovoltaic module's appearance and resulting in a better overall look.

[0042] Furthermore, the first and second strips in this application cover the opposite side of the solder strip. Specifically, the first strip connects to the side of the solder strip away from the solar cell, thus connecting the solder strip to the solar cell and improving the dimensional stability of the solar cell, reducing the likelihood of warping. The second strip connects to the side of the solder strip closer to the solar cell and is located between two adjacent solar cells. This not only masks the gap between adjacent solar cells, improving the appearance of the photovoltaic module, but also secures adjacent solar cells, preventing changes in the gap between them, reducing the amount of solder strip expansion and contraction, and improving the reliability of the photovoltaic module. Attached Figure Description

[0043] Figure 1 This is a top view of the photovoltaic module described in the embodiments of this application;

[0044] Figure 2 This diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 1 ;

[0045] Figure 3 This diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 2 ;

[0046] Figure 4 This is a partial cross-sectional view of the photovoltaic module described in the embodiments of this application;

[0047] Figure 5 This diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 3 ;

[0048] Figure 6 express Figure 5 Enlarged view of a portion (I);

[0049] Figure 7 express Figure 5 Enlarged view of the part II;

[0050] Figure 8 express Figure 5 Enlarged view of a portion III;

[0051] Figure 9 express Figure 5 Sectional view at Z1-Z1;

[0052] Figure 10 express Figure 5 A sectional view at Z2-Z2 in the middle;

[0053] Figure 11 express Figure 5 Sectional view at Z3-Z3;

[0054] Figure 12 This diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 4 ;

[0055] Figure 13 express Figure 12 Partial magnified view IV;

[0056] Figure 14 express Figure 12 A magnified view of a portion of the image, V;

[0057] Figure 15 express Figure 12 VI. A magnified view of a portion of the image;

[0058] Figure 16 This is a schematic diagram showing the structure of the solder strip in the embodiments of this application;

[0059] Figure 17 This diagram illustrates the structure of the first strip or the third strip in the embodiments of this application. Figure 1 ;

[0060] Figure 18 This diagram illustrates the structure of the first strip in the embodiments of this application. Figure 2 ;

[0061] Figure 19 This is a schematic diagram of the structure of the battery cell described in the embodiments of this application;

[0062] Figure 20 This is a schematic diagram of the structure of the second strip in an embodiment of this application;

[0063] Figure label:

[0064] 10: Battery cells;

[0065] 20: Welding strip;

[0066] 30: The first band;

[0067] 40: Second strip; 41: First part; 42: Second part;

[0068] 50: Busbar;

[0069] 60: The third band;

[0070] A: First direction; B: Second direction; Detailed Implementation

[0071] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of the present invention.

[0072] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0073] Reference Figure 1 A top view of the photovoltaic module described in an embodiment of this application is shown; refer to Figure 2 The diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 1 ;reference Figure 3 The diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 2 ;reference Figure 4 A partial cross-sectional view of the photovoltaic module described in an embodiment of this application is shown; refer to Figure 5 The diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 3 ;reference Figure 6 , showed Figure 5 A magnified view of a portion of the image; refer to... Figure 7 , showed Figure 5 A magnified view of the portion II; refer to Figure 8 , showed Figure 5 A magnified view of part III; refer to Figure 9 The diagram illustrates the structure of the photovoltaic module described in the embodiments of this application. Figure 4 ;reference Figure 10 , showed Figure 9 A magnified view of the portion IV; see reference. Figure 11 , showed Figure 9 A magnified view of a portion of V; refer to Figure 12 , showed Figure 9 VI. A magnified view of the portion; see reference. Figure 13 , showed Figure 9 Sectional view at Z1-Z1; refer to Figure 14 , showed Figure 9 Sectional view at Z2-Z2; refer to Figure 15 , showed Figure 9 Sectional view at Z3-Z3; refer to Figure 16A schematic diagram of the structure of the solder strip described in an embodiment of this application is shown; refer to Figure 17 The diagram illustrates the structure of the first strip or the third strip in an embodiment of this application. Figure 1 ;reference Figure 18 The diagram illustrates the structure of the first strip in an embodiment of this application. Figure 2 ;reference Figure 19 A schematic diagram of the structure of the battery cell described in the embodiments of this application is shown; refer to Figure 20 The diagram shows a schematic representation of the structure of the second strip in an embodiment of this application.

[0074] like Figures 1 to 20 As shown in the embodiment of this application, a photovoltaic module is disclosed. The photovoltaic module includes a cell 10; a solder ribbon 20 extending along a first direction A and connected to the cell 10; a first strip 30 extending along the first direction A and covering the cell 10; and a second strip 40 extending along a second direction B and connected to the edge of the cell 10, wherein the second direction B is perpendicular to the first direction A; wherein the first strip 30 and the second strip 40 cover the opposite side of the solder ribbon 20.

[0075] like Figures 1 to 20 As shown in the embodiments of this application, the photovoltaic module includes a solar cell 10, a solder ribbon 20, a first strip 30, and a second strip 40. The solar cell 10, as the core component of the photovoltaic module, converts solar energy into electrical energy. The side of the solar cell 10 facing sunlight is the light-receiving side, i.e., the front side of the solar cell 10. The side of the solar cell 10 not facing sunlight is the back side, i.e., the rear side of the solar cell 10.

[0076] It should be noted that the battery cell 10 in this embodiment is a rectangular structure. The first direction A is the width direction of the battery cell 10, and the second direction B is the width direction of the battery cell 10.

[0077] like Figures 1 to 20 As shown, in this embodiment, the solder ribbon 20 extends along the first direction A and is connected to the battery cell 10. The solder ribbon 20 collects the current generated by the battery cell 10 and transmits the collected current to an external circuit. Specifically, the solder ribbon 20 can be connected to the front or back of the battery cell 10. This application does not impose specific limitations on this. In practical applications, those skilled in the art can configure it as needed. The following description will use the example of the solder ribbon 30 being connected to the back of the battery cell 10.

[0078] In this embodiment, the first strip 30 also extends along the first direction A and covers the battery cell 10. Specifically, the first strip 30 can cover the side of the solder ribbon 20 away from the battery cell 10, so as to fix the solder ribbon 20 to the surface of the battery cell 10 by means of the first strip 30. In this embodiment, fixing the solder ribbon 20 to the surface of the battery cell 10 by means of the first strip 30 makes the dimensional stability of the battery cell 10 better and less prone to warping.

[0079] It should be noted that the first strip 30 in this embodiment can be an adhesive strip to bond the welding ribbon 20 to the surface of the battery cell 10. Specifically, the first strip 30 can be a single-layer adhesive strip or a multi-layer adhesive strip. When the first strip 30 is a single-layer adhesive strip, it can be an EVA strip, a POE strip, or a PET strip. When the first strip 30 is a multi-layer adhesive strip, it can be a composite layer of organic materials such as EVA, POE, and PET. For example, the first strip 30 in this embodiment can have a three-layer structure, including an EVA layer, a POE layer, and a PET layer. The first strip 30 can also have a two-layer structure, including an EVA layer and a POE layer.

[0080] Of course, the above are merely examples of the specific structure and material of the first strip 30 in this application embodiment, and are not intended to limit this application. In practical applications, those skilled in the art can also set the specific structure and material of the first strip 30 as needed.

[0081] like Figures 1 to 20 As shown, the photovoltaic module in this embodiment further includes a second strip 40, which extends along a second direction B and is connected to the edge of the solar cell 10. Exemplarily, the solar cell 10 may include multiple solar cells 10, which are arranged at intervals along a first direction A, with gaps between adjacent solar cells 10. One side of the second strip 40 is connected to the edge of one solar cell 10, and the other side of the second strip 40 is connected to the edge of another adjacent solar cell 10. This allows the second strip 40 to cover the gaps between adjacent solar cells 10, improving the consistency of the photovoltaic module's appearance color and enhancing its overall aesthetics.

[0082] In the manufacturing process of photovoltaic modules, firstly, multiple solar cells 10 are arranged at intervals along a first direction A. Then, a second strip 40 is extended along a second direction B, with one side of the second strip 40 connected to the edge of one solar cell 10 and the other side connected to the edge of an adjacent solar cell 10. This uses the second strip 40 to cover the gap between adjacent solar cells 10, thereby improving the appearance of the photovoltaic module. Next, a solder ribbon 20 is extended along the first direction A, with one end connected to one solar cell 10 and the other end extending to and connected to an adjacent solar cell 10. This connects two adjacent solar cells 10 in series using the solder ribbon 20. Finally, a first strip 30 is extended along the first direction A and covers the side of the solder ribbon 20 away from the solar cell 10, thus fixing the solder ribbon 20 to the solar cell 10 using the first strip 30.

[0083] It should be noted that the solder strip 20 in this embodiment can be a circular solder strip, a flat solder strip, or an irregularly shaped solder strip. In this embodiment, no excessive restrictions are placed on the specific structure of the solder strip 20. In practical applications, technicians can select a suitable solder strip 20 as needed. Of course, the solder strip 20 in this embodiment is preferably a flat solder strip with a width of 0.3-0.6 mm and a thickness of 0.2-0.35 mm.

[0084] With the above arrangement, the first strip 30 and the second strip 40 cover the opposite side of the solder strip 20. This opposite side coverage means that, in a direction perpendicular to the surface of the cell 10, one side of the solder strip 20 is at least partially covered by the first strip 30, and the other side of the solder strip 20 is at least partially covered by the second strip 40.

[0085] For example, the second strip 40 covers the side of the solder strip 20 closest to the cell 10, and the first strip 30 covers the side of the solder strip 20 furthest from the cell 10. That is, the first strip 30 is connected to the side of the solder strip 20 furthest from the cell 10 so that the solder strip 20 is connected to the cell 10 through the first strip 30, which makes the dimensional stability of the cell 10 better and less prone to warping.

[0086] The second strip 40 connects two adjacent solar cells 10. It not only shields the gap between the two cells 10, improving the appearance of the photovoltaic module, but also secures them, preventing changes in the gap and reducing the expansion and contraction of the solder ribbon 20, thus improving the reliability of the photovoltaic module.

[0087] It should be noted that the second strip 40 in this embodiment may have the same material and structure as the first strip 30, or it may have a different material and structure. Specifically, the second strip 40 may be an adhesive strip, with the side of the adhesive strip closest to the battery cell 10 being adhesive. One side of the adhesive strip is bonded to the edge of one battery cell 10, and the other side is bonded to the edge of an adjacent battery cell 10. The material and structure of the adhesive strip are the same as those of the first strip 30 described above. Further details will not be repeated here.

[0088] Alternatively, the second strip 40 can also be adhesive tape. For example, when the photovoltaic module is black, one side of the black tape can be adhered to the edge of one solar cell 10, and the other side of the black tape can be adhered to the edge of an adjacent solar cell 10. This covers the gap between two adjacent solar cells 10 with black tape, making the photovoltaic module appear entirely black.

[0089] Of course, in this embodiment, there are no excessive restrictions on the specific material or color of the second strip 40. The second strip 40 only needs to be able to connect to two adjacent battery cells 10.

[0090] Optionally, such as Figures 6 to 8 As shown, in this embodiment of the application, the first strip 30 and the second strip 40 have a first gap on the plane where the battery cell 10 is located.

[0091] In other words, on the plane where the solar cell 10 is located, there is a first gap between the end of the first strip 30 and the side of the second strip 40. During the lamination process of the photovoltaic module, if the first strip 30 and the second strip 40 overlap on the plane where the solar cell 10 is located, the second strip 40 can easily cause the first strip 30 to shift, thereby affecting the reliability of the connection between the solder ribbon 20 and the solar cell 10, and thus affecting the photoelectric conversion efficiency of the photovoltaic module. Therefore, the setting of the first gap can improve the reliability of the connection between the solder ribbon 20 and the solar cell 10, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0092] Specifically, such as Figures 1 to 20 As shown, in this embodiment, the first gap is greater than 1 mm. That is, along the first direction A, the distance between the end of the first strip 30 and the side of the second strip 40 is greater than 1 mm. This avoids the second strip 40 overlapping with the first strip 30 during the photovoltaic module lamination process, preventing the second strip 40 from causing the first strip 30 to shift and affecting the reliability of the connection between the solder ribbon 20 and the solar cell 10. This results in better reliability and higher photoelectric conversion efficiency for the photovoltaic module.

[0093] For example, along the first direction A, the width of the first gap can be 1mm, 2mm, 3mm, 4mm, etc. Of course, the above are merely examples of the width of the first gap and are not intended to limit this application. In practical applications, those skilled in the art can set the specific dimensions of the first gap as needed.

[0094] Optionally, such as Figures 6 to 8 As shown, the battery cell 10 includes a plurality of battery cells 10, which are arranged at intervals along a first direction A. Among two adjacent battery cells 10, there is a first region between the first strip 30 on one battery cell 10 and the first strip 30 on the adjacent battery cell 10, and the first gap is located within the first region.

[0095] like Figures 6 to 8 As shown, the battery cells 10 in this embodiment include multiple cells, which are arranged at intervals along a first direction A. Between two adjacent battery cells 10, a first region exists between the first stripe 30 on one battery cell 10 and the first stripe 30 on the other battery cell 10. That is, in two adjacent battery cells 10, one battery cell 10 has one corresponding first stripe 30, and the other battery cell 10 has another corresponding first stripe 30; the first stripe 30 does not cross the first gap between the two adjacent battery cells 10.

[0096] The region between the first strip 30 on one solar cell 10 and the first strip 30 on an adjacent solar cell 10 is called the first region, and the first gap is located within the first region. That is, the second strip 40 is not connected to the first strip 30 corresponding to one solar cell 10, nor is it connected to the first strip 30 corresponding to an adjacent solar cell 10. This further improves the reliability of the connection between the solder ribbon 20 and the solar cell 10, and enhances the photoelectric conversion efficiency of the photovoltaic module.

[0097] Optionally, such as Figures 6 to 8 As shown, in this embodiment of the application, the second strip 40 passes through the first region along the first direction A. One side of the second strip 40 is connected to the edge of a battery cell 10, and the other side of the second strip 40 is connected to the edge of another adjacent battery cell 10. The first gap includes two gaps: one gap is located between the end of the first strip 30 on a battery cell 10 and one side of the second strip 40, and the other gap is located between the end of the first strip 30 on another adjacent battery cell 10 and the other side of the second strip 40.

[0098] like Figures 6 to 8As shown, in this embodiment, the second strip 40 passes through the first region. That is, the second strip 40 extends along the second direction B and passes through the region between the first strip 30 corresponding to one solar cell 10 and the first strip 30 corresponding to another adjacent solar cell 10. This creates a first gap between one side of the second strip 40 and the end of the first strip 30 on one solar cell 10, and a first gap between the other side of the second strip 40 and the end of the first strip 30 on another adjacent solar cell 10. This further improves the reliability of the connection between the solder ribbon 20 and the solar cell 10, and enhances the photoelectric conversion efficiency of the photovoltaic module.

[0099] Optionally, such as Figures 9 to 11 As shown, the photovoltaic module in this embodiment of the application also includes a busbar 50. Along the first direction A, the busbar 50 and the solar cell 10 are arranged at intervals. There is a second region between the first strip 30 on the solar cell 10 and the busbar 50, and the first gap is located in the second region.

[0100] like Figures 9 to 11 As shown, the photovoltaic module in this embodiment further includes a busbar 50. Along the first direction A, the busbar 50 and the solar cells 10 are arranged at intervals. One end of the solder ribbon 20 is connected to the solar cell 10, and the other end of the solder ribbon 20 is passed through the gap between the solar cell 10 and the busbar 50 and connected to the busbar 50. This allows the current collected by the solder ribbon 20 to be collected through the busbar 50 and transmitted to an external circuit.

[0101] like Figures 9 to 11 As shown, on the plane where the battery cell 10 is located, there is a second region between the first strip 30 on the battery cell 10 and the busbar 50, and the first gap is located within the second region. That is, the first strip 30 does not cross the gap between the battery cell 10 and the busbar 50; the first strip 30 is only disposed above the battery cell 10. One side of the second strip 40 is connected to the battery cell 10, and the other side is connected to the busbar 50. Furthermore, there is a first gap between the end of the first strip 30 near the second strip 40 and the side of the second strip 40 near the first strip 30.

[0102] In this application, by setting the first gap between the end of the first strip 30 near the second strip 40 and the side of the second strip 40 near the first strip 30, the first strip 30 is prevented from being pulled by the second strip 40, which would affect the reliability of the connection between the solder strip 20 and the cell 10, thus making the photovoltaic module more reliable.

[0103] Optionally, such as Figures 9 to 11 As shown, the second strip 40 extends from the back edge of the battery cell 10 to the front of the busbar 50.

[0104] like Figures 9 to 11As shown, in this embodiment, the second strip 40 extends along the second direction B and along the first direction A. One side of the second strip 40 is connected to the back edge of the solar cell 10, and the other side of the second strip 40 is connected to the front of the busbar 50. This allows the second strip 40 to cover the gap between the solar cell 10 and the busbar 50, thereby improving the consistency of the photovoltaic module's appearance color and resulting in a better-looking photovoltaic module.

[0105] Optionally, such as Figures 9 to 11 As shown, in this embodiment of the application, one end of the solder strip 20 is connected to the battery cell 10, and the other end is connected to the busbar 50.

[0106] like Figures 9 to 11 As shown in this embodiment, one end of the solder ribbon 20 is connected to the surface of the battery cell 10, and the other end of the solder ribbon 20 passes through the gap between the battery cell 10 and the busbar 50 and is connected to the surface of the busbar 50. The battery cell 10 and the busbar 50 are electrically connected together via the solder ribbon 20, so that the current collected by the solder ribbon 20 can be collected by the busbar 50 and transmitted to an external circuit.

[0107] Optionally, such as Figures 9 to 11 As shown, the second strip 40 in this embodiment of the application includes a first portion 41 and a second portion 42, wherein the first portion 41 extends from the back edge of the battery cell 10 to the area between the battery cell 10 and the busbar 50, and the second portion 42 extends from the front of the busbar 50 to the area between the battery cell 10 and the busbar 50; and the first portion 41 and the second portion 42 at least partially overlap.

[0108] like Figures 9 to 11 As shown, the second strip 40 in this embodiment includes a first portion 41 and a second portion 42. Both the first portion 41 and the second portion 42 extend along a second direction B, and along a first direction A, one side of the first portion 41 is connected to the back edge of the solar cell 10 and extends to the area between the solar cell 10 and the busbar 50. One side of the second portion 42 is connected to the front side of the busbar 50 and extends to the area between the solar cell 10 and the busbar 50. Along the first direction A, the first portion 41 and the second portion 42 at least partially overlap. Therefore, the first portion 41 and the second portion 42 can block the gap between the solar cell 10 and the busbar 50, thereby improving the consistency of the photovoltaic module's appearance color and resulting in a better-looking photovoltaic module.

[0109] Furthermore, in this embodiment of the application, the second strip 40 is configured to include a first portion 41 and a second portion 42, so as to connect the first portion 41 and the second portion 42 between the battery cell 10 and the busbar 50.

[0110] Optionally, such as Figures 9 to 11As shown, in this embodiment of the application, the solder strip 20 passes through the overlapping portion of the first portion 41 and the second portion 42, and the overlapping portion of the first portion 41 and the second portion 42 is located on the same side of the solder strip 20.

[0111] like Figures 9 to 11 As shown, the solder ribbon 20 passes through the area between the battery cell 10 and the busbar 50, connecting the battery cell 10 and the busbar 50 in series. The first portion 41 and the second portion 42 overlap in the area between the battery cell 10 and the busbar 50. That is, the solder ribbon 20 can pass through the overlapping portion of the first portion 41 and the second portion 42.

[0112] Furthermore, the overlapping portions of the first part 41 and the second part 42 are located on the same side of the solder strip 20, thereby shielding the area between the solar cell 10 and the busbar 50 through the first part 41 and the second part 42, thereby improving the consistency of the photovoltaic module's appearance color and making the photovoltaic module look better.

[0113] Optionally, such as Figures 9 to 11 As shown, in this embodiment of the application, the first strip 30 and the first part 41 are located on different sides of the solder strip 20; on the plane where the battery cell 10 is located, the first strip 30 has a first projection, the first part 41 has a second projection, and there is a first gap between the first projection and the second projection.

[0114] like Figures 9 to 11 As shown, in this embodiment, the solder ribbon 20 extends along the first direction A, with one end connected to the surface of the battery cell 10 and the other end passing through the area between the battery cell 10 and the busbar 50, and connected to the surface of the busbar 50. A first strip 30 also extends along the first direction A and covers the side of the solder ribbon 20 away from the battery cell 10, thereby fixing the solder ribbon 20 to the surface of the battery cell 10. This results in better dimensional stability of the battery cell 10 and reduces the likelihood of warping.

[0115] like Figures 9 to 11As shown in this embodiment, the first strip 30 and the first portion 41 are located on different sides of the solder ribbon 20. During the processing of the photovoltaic module, one side of the first portion 41 can be first connected to the back edge of the cell 10, and then one side of the second portion 42 can be connected to the front of the busbar 50. Along the first direction A, the cell 10 and the busbar 50 are arranged at intervals, so that the first portion 41 and the second portion 42 partially overlap. Next, the solder ribbon 20 is laid, with one end connected to the back of the cell, and the other end passing over the first portion 41 and the second portion 42 and connected to the back of the busbar 50. Then, the first strip 30 is laid on the side of the solder ribbon 20 away from the cell 10, so that the solder ribbon 20 is fixed to the surface of the cell 10 by the first strip 30. Based on the above arrangement, the first strip 30 and the first portion 41 are located on different sides of the solder ribbon 20.

[0116] like Figures 9 to 11 As shown in this embodiment, on the plane where the solar cell 10 is located, the first strip 30 has a first projection, and the first portion 41 has a second projection, with a first gap between the first projection and the second projection. It can be understood that on the plane where the solar cell 10 is located, the first projection of the first strip 30 and the second projection of the first portion 41 do not overlap. This improves the reliability of the photovoltaic module and enhances its photoelectric conversion efficiency.

[0117] Optionally, such as Figure 14 and Figure 15 As shown, in this embodiment of the application, the projection of the first strip 30 on the plane where the battery cell 10 is located overlaps at least partially with the projection of the second strip 40 on the plane where the battery cell 10 is located.

[0118] like Figure 14 and Figure 15 As shown, the solar cells 10 in this embodiment include at least two cells, which are arranged at intervals along a first direction A. A second strip 40 extends along a second direction B and is located between two adjacent solar cells 10. One side of the second strip 40 is connected to the edge of one solar cell 10, and the other side is connected to the edge of another adjacent solar cell 10. The second strip 40 blocks the gap between two adjacent solar cells 10, improving the consistency of the photovoltaic module's appearance color and making the photovoltaic module look better.

[0119] like Figure 14 and Figure 15 As shown, the first strip 30 can cover the solder ribbon 20 of one battery cell 10 and pass through the gap between two adjacent battery cells 10, covering the solder ribbon 20 of another adjacent battery cell 10. This results in the projection of the first strip 30 overlapping with the projection of the second strip 40 on the plane of the battery cell 10.

[0120] Furthermore, since the first strip 30 passes through the gap between two adjacent battery cells 10, the overlapping portion of the first strip 30 and the second strip 40 covers the gap between two adjacent battery cells 10 on the plane where the battery cell 10 is located.

[0121] Optionally, such as Figures 1 to 15 As shown, the solder strip 20 in this embodiment includes multiple strips, which are arranged at intervals along the second direction B; the first strip 30 also includes multiple strips, with at least one first strip 30 corresponding to one solder strip 20.

[0122] like Figures 1 to 15 As shown in this embodiment, multiple solder ribbons 20 are arranged on the surface of the battery cell 10. The solder ribbons 20 extend along a first direction A and are spaced apart along a second direction B. The current generated by the battery cell 10 is collected through the multiple solder ribbons 20.

[0123] In this embodiment, the first strip 30 also includes multiple strips, with each first strip 30 corresponding to a solder strip 20. This allows each solder strip 20 to be fixed to the surface of the solar cell 10 using each first strip 30. This reduces the amount of first strips 30 used, decreases surface shading on the solar cell 10, thereby reducing the cost of the photovoltaic module and improving its photoelectric conversion efficiency.

[0124] Optionally, such as Figures 5 to 15 As shown, in this embodiment of the application, the first strip 30 covers the end of the welding strip 20 near the second strip 40.

[0125] like Figures 5 to 15 As shown in this embodiment, the first strip 30 covers the end of the solder ribbon 20 near the second strip 40. This allows the solder ribbon 20 to be better connected to the surface of the solar cell 10 via the first strip 30, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0126] Optionally, such as Figures 5 to 8 As shown, the solar cell 10 in this embodiment includes at least two solar cells 10, which are arranged at intervals along a first direction A. The photovoltaic module also includes a third strip 60, and a solder strip 20 connects two adjacent solar cells 10. A first strip 30 covers the solder strip 20 of one solar cell 10, and a third strip 60 covers the solder strip 20 of another adjacent solar cell 10. The first gap is located between the third strip 60 and the second strip 40, and / or the first gap is located between the first strip 30 and the second strip 40.

[0127] like Figures 5 to 8As shown, the battery cell 10 in this embodiment includes at least two cells, which are arranged at intervals along a first direction A. One end of the solder ribbon 20 is connected to one battery cell 10, and the other end passes through the gap between two adjacent battery cells 10 and is connected to another adjacent battery cell 10. A first strip 30 covers the solder ribbon 20 corresponding to one battery cell 10, and a third strip 60 covers the solder ribbon 20 corresponding to another adjacent battery cell 10. That is, the first strip 30 and the third strip 60 are respectively disposed corresponding to one battery cell 10, connecting the solder ribbon 20 corresponding to that battery cell 10 to the surface of the battery cell 10. Neither the first strip 30 nor the third strip 60 crosses the first gap between two adjacent battery cells 10; they only cover the portion of the solder ribbon 20 above the battery cell 10 to fix the solder ribbon 20 to the battery cell 10. This results in better dimensional stability of the battery cell 10 and reduces the likelihood of warping.

[0128] Optionally, such as Figures 12 to 15 As shown, the battery cell 10 in this embodiment includes at least two, and the at least two battery cells 10 are arranged at intervals along the first direction A. The second strip 40 is located between two adjacent battery cells 10 and is connected to the edges of the two adjacent battery cells 10. The first strip 30 covers the solder strip 20 of one battery cell 10 and passes through the second strip 40 to cover the solder strip 20 of the other adjacent battery cell 10.

[0129] like Figures 12 to 15 As shown, the solar cells 10 in this embodiment include at least two cells, which are arranged at intervals along a first direction A. A second strip 40 extends along a second direction B and is located between two adjacent solar cells 10. One side of the second strip 40 is connected to the edge of one solar cell 10, and the other side is connected to the edge of another adjacent solar cell 10. The second strip 40 blocks the gap between two adjacent solar cells 10, thereby improving the consistency of the photovoltaic module's appearance color and making the photovoltaic module look better.

[0130] like Figures 12 to 15 As shown, a first strip 30 is placed over the solder ribbon 20 of one solar cell 10, and then the first strip 30 is passed through a second strip 40. That is, the first strip 30 passes through the first gap between two adjacent solar cells 10 and covers the solder ribbon 20 of another adjacent solar cell 10. This allows the solder ribbons 20 on the two adjacent solar cells 10 to be fixed to their respective solar cells 10 using the first strip 30. This improves the efficiency of fixing the solder ribbons 20 to the solar cells 10 and increases the processing efficiency of the photovoltaic module.

[0131] Optionally, such as Figures 12 to 15As shown, in this embodiment of the application, the welding strip 20 is connected to two adjacent battery cells 10; the first strip 30 and the second strip 40 wrap around the portion of the welding strip 20 located between the two adjacent battery cells 10.

[0132] like Figures 12 to 15 As shown, one end of the solder ribbon 20 is connected to the surface of one solar cell 10, and the other end of the solder ribbon 20 is passed through the first gap between two adjacent solar cells 10 and connected to the surface of another adjacent solar cell 10. Thus, two adjacent solar cells 10 are connected in series via the solder ribbon 20, and the current generated on the surfaces of the two adjacent solar cells 10 is collected and transmitted to an external circuit.

[0133] In the manufacturing process of photovoltaic modules, multiple solar cells 10 are typically arranged at intervals along a first direction A. A second strip 40 is then extended along a second direction B, with one side of the second strip 40 connected to the edge of one solar cell 10 and the other side connected to the edge of an adjacent solar cell 10. Next, one end of a solder ribbon 20 is laid on the surface of one solar cell 10, and the other end passes through the first gap between two adjacent solar cells 10 and is laid on the surface of an adjacent solar cell 10. Finally, a first strip 30 is laid over the solder ribbon 20, fixing one end of the solder ribbon 20 to the surface of one solar cell 10 through one end of the first strip 30 and fixing the other end of the solder ribbon 20 to the surface of an adjacent solar cell 10 through the other end of the first strip 30.

[0134] In other words, the second strip 40 wraps around the portion of the solder ribbon 20 located below the portion between two adjacent solar cells 10, while the first strip 30 wraps around the portion of the solder ribbon 20 located above the portion between two adjacent solar cells 10. By wrapping the portion of the solder ribbon 20 between two adjacent solar cells 10 with the second strip 40 and the first strip 30, the portion of the solder ribbon 20 located between two adjacent solar cells 10 is fixed between the second strip 40 and the first strip 30. This ensures the stability of the solder ribbon 20 between two adjacent solar cells 10, making the solder ribbon 20 less prone to pulling or stretching, thus preventing connection failure between the solder ribbon 20 and the solar cells 10, and further improving the reliability of the photovoltaic module.

[0135] Optionally, such as Figures 5 to 8 , Figures 12 to 15 As shown in the embodiment of this application, along the second direction B, the distance between two adjacent solder strips 20 is L, the width of the solder strip 20 is a, and the width of the first strip 30 located in the middle region is b2, satisfying 3a≤b2≤L.

[0136] like Figures 5 to 8 , Figures 12 to 15As shown in this embodiment, the width b2 of the first strip 30 located in the middle region is set to be greater than or equal to three times the width a of the solder strip 20 and less than or equal to the gap L between two adjacent solder strips 20. This allows the first strip 30 located in the middle region to more securely fix the corresponding solder strip 20 to the surface of the battery cell 10.

[0137] If the width of the first strip 30 in the middle region is less than three times the width of the solder strip 20, it is difficult to ensure that both sides of the first strip 30 are bonded to the surface of the cell 10, resulting in insufficient adhesion of the first strip 30 and causing the solder strip 20 to shift. If the width of the first strip 30 in the middle region is greater than the distance between two adjacent solder strips 20, the first strip 30 is prone to sticking to the adjacent first strips 30, causing the solder strip 20 to shift and affecting the photovoltaic conversion efficiency of the photovoltaic module.

[0138] Optionally, such as Figures 5 to 8 , Figures 12 to 15 As shown in the embodiment of this application, along the second direction B, the distance between the solder strip 20 closest to the edge of the battery cell 10 and the edge of the battery cell 10 is M, the width of the solder strip 20 is a, and the width of the first strip 30 closest to the edge of the battery cell 10 is b1, satisfying 3a≤b1≤M.

[0139] like Figures 5 to 8 , Figures 12 to 15 As shown in this embodiment, the width b1 of the first strip 30 closest to the edge of the battery cell 10 is set to be greater than or equal to three times the width a of the solder strip 20 and less than or equal to the distance M between the solder strip 20 closest to the edge of the battery cell 10 and the edge of the battery cell 10. This allows the first strip 30 closest to the edge of the battery cell 10 to more securely fix the corresponding solder strip 20 to the surface of the battery cell 10.

[0140] If the width of the first strip 30 closest to the edge of the battery cell 10 is less than three times the width of the solder strip 20, it is difficult to ensure that both sides of the first strip 30 closest to the edge of the battery cell 10 are bonded to the surface of the battery cell 10, resulting in insufficient adhesion of the first strip 30 and causing the solder strip 20 to shift. If the width of the first strip 30 closest to the edge of the battery cell 10 is greater than the distance between the solder strip 20 closest to the edge of the battery cell 10 and the edge of the battery cell 10, the first strip 30 will extend beyond the edge of the battery cell 10, which can easily cause poor adhesion and solder strip shifting.

[0141] Optionally, such as Figures 5 to 15 As shown, the embodiments of this application satisfy 1mm≤M≤10mm.

[0142] like Figures 5 to 15As shown in this embodiment, the distance M between the solder strip 20 closest to the edge of the battery cell 10 and the edge of the battery cell 10 is set to be greater than or equal to 1 mm and less than or equal to 10 mm. This ensures that the solder strip 20 closest to the edge of the battery cell 10 has a sufficiently large distance from the edge of the battery cell 10, allowing the second strip 40 to be bonded to the edge of the battery cell 10, and a first gap exists between the second strip 40 and the first strip 30.

[0143] Furthermore, if the distance between the solder ribbon 20 closest to the edge of the solar cell 10 and the edge of the solar cell 10 is too large, it will affect the photoelectric conversion efficiency of the photovoltaic module. Therefore, in this embodiment, the distance between the solder ribbon 20 closest to the edge of the solar cell 10 and the edge of the solar cell 10 is set to be less than or equal to 10 mm to improve the photoelectric conversion efficiency of the photovoltaic module.

[0144] For example, the distance M between the solder strip 20 closest to the edge of the battery cell 10 and the edge of the battery cell 10 can be set to 1mm, 3mm, 5mm, 7mm, 9mm, 10mm, etc.

[0145] Optionally, such as Figure 4 As shown in the embodiment of this application, along the second direction B, the distance between the first strip 30 closest to the edge of the battery cell 10 and the edge of the battery cell 10 is h1; along the second direction B, the distance between the end of the second strip 40 and the edge of the battery cell 10 is h2, satisfying h1 > h2.

[0146] During the movement and lamination of the photovoltaic module, the second strip 40 is more prone to change. In order to improve the reliability of the photovoltaic module, in this embodiment, the distance between the first strip 30 closest to the edge of the cell 10 and the edge of the cell 10 is set to be greater than the distance between the end of the second strip 40 and the edge of the cell 10.

[0147] Optionally, such as Figures 5 to 8 As shown in the embodiment of this application, along the first direction A, the width of the battery cell 10 is f, and the length of the first strip 30 or the third strip 60 is c, satisfying c < f.

[0148] like Figure 19 As shown, the battery cell 10 in this embodiment of the application has a rectangular structure, with a length of e and a width of f. Figures 5 to 8As shown in this embodiment, along the first direction A, the length c of the first strip 30 and the third strip 60 is set to be less than the width f of the battery cell 10. That is, along the first direction A, the width f of the battery cell 10 is set to be greater than the length c of either the first strip 30 or the third strip 60. Thus, the solder ribbon 20 is fixed to the surface of the battery cell 10 using multiple segments of the first strip 30. This reduces the amount of first strip 30 used and minimizes surface occlusion on the battery cell 10.

[0149] Optionally, such as Figures 12 to 15 As shown, the battery cell 10 in this embodiment includes n cells, which are arranged at intervals along the first direction A; the width of each battery cell 10 is f, the gap between two adjacent battery cells 10 is x, and the length of the first strip 30 is d, which satisfies d < n*f + (n-1)*x.

[0150] like Figures 12 to 15 As shown, the photovoltaic module disclosed in this application can be a back-contact photovoltaic module. This back-contact photovoltaic module includes n solar cells, each solar cell 10 being a rectangular structure. The n solar cells are arranged at intervals along a first direction A. Along the first direction A, the width of each solar cell 10 is f, and the gap between two adjacent solar cells 10 is x. Wherein, n is a positive integer.

[0151] The first strip 30 extends along the first direction A and covers the surfaces of the n battery cells 10 to fix the solder ribbon 20 corresponding to each battery cell 10 to the surface of the battery cell 10. Furthermore, along the first direction A, the length d of the first strip 30 is set to be less than the sum of n times the width f of the battery cell 10 and n-1 times the gap x between two adjacent battery cells 10. Thus, the solder ribbon 20 is fixed to the surface of the battery cell 10 using the entire first strip 30, thereby reducing the amount of the first strip 30 used and minimizing surface obstruction of the battery cell 10.

[0152] Optionally, such as Figures 1 to 15 As shown, the battery cell 10 in this embodiment includes multiple cells. Along the first direction A, the multiple battery cells 10 are arranged at intervals, and the gap between two adjacent battery cells 10 is x, which satisfies x≥0.1mm.

[0153] like Figures 1 to 15 As shown, the battery cells 10 in this embodiment of the application include multiple battery cells 10, which are arranged at intervals along a first direction A, with a gap between adjacent battery cells 10, which is greater than or equal to 0.1 mm. For example, along the first direction A, the gap between adjacent battery cells 10 can be set to 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc.

[0154] Since the solar cell 10 in this embodiment is less prone to warping, and with the support of the second strip 40, and the characteristic that the back-contact photovoltaic module solder strips 20 are all connected to the back of the solar cell 10, in this embodiment, along the first direction A, the gap between two adjacent solar cells 10 can be set to be greater than or equal to 0.1 mm to improve the photoelectric conversion efficiency of the photovoltaic module.

[0155] Optionally, such as Figures 5 to 8 , Figures 12 to 15 As shown in the embodiment of this application, along the first direction A, the width of the second strip 40 is g, and the distance between the end of the welding strip 20 near the edge of the battery cell 10 and the edge of the battery cell 10 is t, satisfying x+2≤g<2*t+x.

[0156] like Figures 5 to 8 , Figures 12 to 15 As shown in the embodiment of this application, along the first direction A, the width of the second strip 40 is g, the distance between the end of the welding strip 20 near the edge of the battery cell 10 and the edge of the battery cell 10 is t, and the gap between two adjacent battery cells 10 is x.

[0157] Specifically, along the first direction A, the width of the second strip 40 is set to be greater than or equal to the gap x between two adjacent solar cells 10 plus 2mm. This allows one side of the second strip 40 to connect to the edge of one solar cell 10 along the first direction A, and the other side of the second strip 40 to connect to the edge of another adjacent solar cell 10. This allows the second strip 40 to block the gap between two adjacent solar cells 10, improving the consistency of the photovoltaic module's appearance color and resulting in a better-looking photovoltaic module.

[0158] Furthermore, in this embodiment, along the first direction A, the width of the second strip 40 is set to be less than twice the sum of the distance t between the end of the solder strip 20 near the edge of the cell 10 and the edge of the cell 10, and the gap x between two adjacent cells 10. This ensures that there is a gap between the second strip 40 and the end of the solder strip 20 near the edge of the cell 10 along the first direction A. This prevents the second strip 40 and the first strip 30 from overlapping, causing the first strip 30 to shift, affecting the reliability of the connection between the solder strip 20 and the cell 10, and consequently affecting the photoelectric conversion efficiency of the photovoltaic module.

[0159] Optionally, such as Figures 5 to 8 , Figures 12 to 15 As shown in the embodiment of this application, along the first direction A, the distance between the end of the first strip 30 near the edge of the battery cell 10 and the edge of the battery cell 10 is s, which satisfies 0 < s ≤ t-1.

[0160] like Figures 5 to 8 , Figures 12 to 15As shown in the embodiment of this application, along the first direction A, the distance between the end of the first strip 30 near the edge of the solar cell 10 and the edge of the solar cell 10 is s, and the distance between the end of the solder ribbon 20 near the edge of the solar cell 10 and the edge of the solar cell 10 is t. The distance between the end of the first strip 30 near the edge of the solar cell 10 and the edge of the solar cell 10 is greater than 0 mm. This allows sufficient bonding space to be reserved for the second strip 40, preventing the first strip 30 from overlapping with the second strip 40 and the second strip 40 from pulling on the first strip 30, thus affecting the reliability of the connection between the solder ribbon 20 and the solar cell 10. This improves the photoelectric conversion efficiency of the photovoltaic module.

[0161] In this embodiment, along the first direction A, the distance s between the end of the first strip 30 near the edge of the solar cell 10 and the edge of the solar cell 10 is set to be less than or equal to the distance t between the end of the solder ribbon 20 near the edge of the solar cell 10 and the edge of the solar cell 10 minus 1 mm. This allows the end of the solder ribbon 20 to be fixed to the surface of the solar cell 10 via the first strip 30, thereby improving the reliability of the solder ribbon 20 connection to the solar cell 10 and increasing the photoelectric conversion efficiency of the photovoltaic module.

[0162] Optionally, such as Figures 5 to 8 , Figures 12 to 15 As shown in the embodiment of this application, along the first direction A, the width of the second strip 40 covering the edge of the battery cell 10 is w, satisfying 1≤w≤t.

[0163] like Figures 5 to 8 , Figures 12 to 15 As shown in this embodiment, along the first direction A, the width of the second strip 40 covering the edge of the battery cell 10 is set to w, and w is greater than or equal to 1 mm. That is, along the first direction A, the width of the second strip 40 covering the edge of the battery cell 10 is at least 1 mm. This ensures the reliability of the connection between the second strip 40 and the battery cell 10.

[0164] Furthermore, along the first direction A, the distance between the end of the solder ribbon 20 near the edge of the solar cell 10 and the edge of the solar cell 10 is set to t. The width w of the second strip 40 covering the edge of the solar cell 10 is less than or equal to the distance t between the end of the solder ribbon 20 near the edge of the solar cell 10 and the edge of the solar cell 10. That is, the second strip 40 does not overlap with the end of the solder ribbon 20 near the edge of the solar cell 10. This avoids overlap between the first strip 30 and the second strip 40 covering the solder ribbon 20, thereby improving the reliability of the connection between the solder ribbon 20 and the solar cell 10 and increasing the photoelectric conversion efficiency of the photovoltaic module.

[0165] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0166] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0167] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0168] The technical solution provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A photovoltaic module, characterized in that, include: Battery cells; A solder strip, which extends along a first direction and is attached to the battery cell; A first strip extends along the first direction and covers the battery cell; A second strip extends along a second direction and is connected to the edge of the battery cell, the second direction being perpendicular to the first direction; The first strip and the second strip cover the opposite side of the solder strip; The battery cells include multiple cells, which are arranged at intervals along the first direction, with a gap of x between two adjacent cells, satisfying x≥0.1mm; Along the first direction, the width of the second strip is g, and the distance between the end of the welding strip near the edge of the battery cell and the edge of the battery cell is t, satisfying x+2mm≤g<2*t+x; Along the first direction, the distance between the end of the first strip near the edge of the battery cell and the edge of the battery cell is s, which satisfies 0mm<s≤t-1mm; Along the first direction, the width of the second strip covering the edge of the battery cell is w, satisfying 1mm≤w≤t; The welding strips include multiple strips. Along the second direction, the distance between two adjacent welding strips is L. The width of the welding strips is a. The width of the first strip located in the middle region is b2, satisfying 3a≤b2≤L. The photovoltaic module further includes a busbar, the second band comprising a first portion and a second portion, wherein the first portion extends from the back edge of the solar cell to the area between the solar cell and the busbar, and the second portion extends from the front edge of the busbar to the area between the solar cell and the busbar; and the first portion and the second portion at least partially overlap. Where x is in mm, g is in mm, t is in mm, s is in mm, w is in mm, a is in mm, b² is in mm, and L is in mm.

2. The photovoltaic module according to claim 1, characterized in that, The first strip covers the side of the solder strip away from the battery cell, and the second strip covers the side of the solder strip close to the battery cell.

3. The photovoltaic module according to claim 1, characterized in that, The first strip and the second strip have a first gap on the plane where the battery cell is located.

4. The photovoltaic module according to claim 3, characterized in that, The battery cells comprise a plurality of cells, which are arranged at intervals along the first direction, wherein... In two adjacent battery cells, there is a first region between the first stripe on one battery cell and the first stripe on the adjacent battery cell, and the first gap is located within the first region.

5. The photovoltaic module according to claim 4, characterized in that, The second strip passes through the first region along the first direction, with one side of the second strip connected to the edge of one of the battery cells and the other side of the second strip connected to the edge of another adjacent battery cell; The first gap includes two gaps: one gap is located between the end of the first strip on one of the battery cells and one side of the second strip, and the other gap is located between the end of the first strip on another adjacent battery cell and the other side of the second strip.

6. The photovoltaic module according to claim 3, characterized in that, The first gap is greater than 1 mm.

7. The photovoltaic module according to claim 3, characterized in that, Along the first direction, the busbar and the battery cells are arranged at intervals, wherein, There is a second region between the first strip on the battery cell and the busbar, and the first gap is located within the second region.

8. The photovoltaic module according to claim 7, characterized in that, The second strip extends from the back edge of the battery cell to the front of the busbar.

9. The photovoltaic module according to claim 8, characterized in that, One end of the welding strip is connected to the battery cell, and the other end is connected to the busbar.

10. The photovoltaic module according to claim 9, characterized in that, The solder strip passes through the overlapping portion of the first portion and the second portion, and the overlapping portion of the first portion and the second portion is located on the same side of the solder strip.

11. The photovoltaic module according to claim 9, characterized in that, The first strip and the first portion are located on different sides of the solder strip; On the plane where the battery cell is located, the first strip has a first projection, the first portion has a second projection, and the first gap exists between the first projection and the second projection.

12. The photovoltaic module according to claim 1, characterized in that, The projection of the first strip onto the plane where the battery cell is located overlaps at least partially with the projection of the second strip onto the plane where the battery cell is located.

13. The photovoltaic module according to claim 12, characterized in that, The battery cells comprise a plurality of cells, which are arranged at intervals along the first direction, wherein... On the plane where the battery cell is located, the overlapping portion of the first strip and the second strip covers the gap between two adjacent battery cells.

14. The photovoltaic module according to claim 1, characterized in that, The plurality of said welding strips are arranged at intervals along the second direction; The first strip also includes multiple strips, with at least one first strip corresponding to one of the welding strips.

15. The photovoltaic module according to claim 1, characterized in that, The first strip covers the end of the solder strip near the second strip.

16. The photovoltaic module according to claim 1, characterized in that, The battery cell includes at least two cells, and the at least two battery cells are arranged at intervals along the first direction; The photovoltaic module further includes a third strip, which connects two adjacent cells, the first strip covers the solder strip of one of the cells, and the third strip covers the solder strip of the other adjacent cell; Wherein, the first gap is located between the third strip and the second strip, and / or, the first gap is located between the first strip and the second strip.

17. The photovoltaic module according to claim 1, characterized in that, The battery cell includes at least two, and the at least two battery cells are arranged at intervals along the first direction. The second strip is located between two adjacent battery cells and is connected to the edges of the two adjacent battery cells. The first strip covers the solder strip of one of the battery cells and passes through the second strip to cover the solder strip of the adjacent battery cell.

18. The photovoltaic module according to claim 17, characterized in that, The welding strip connects two adjacent battery cells; The first strip and the second strip wrap around the portion of the welding strip located between two adjacent battery cells.

19. The photovoltaic module according to claim 14, characterized in that, Along the second direction, the distance between the solder strip closest to the edge of the battery cell and the edge of the battery cell is M, the width of the solder strip is a, and the width of the first strip closest to the edge of the battery cell is b1, satisfying 3a≤b1≤M, where b1 is in mm and M is in mm.

20. The photovoltaic module according to claim 1, characterized in that, The condition is satisfied that 1mm ≤ M ≤ 10mm, where M is in mm.

21. The photovoltaic module according to claim 14, characterized in that, Along the second direction, the distance between the first strip closest to the edge of the battery cell and the edge of the battery cell is h1; Along the second direction, the distance between the end of the second strip and the edge of the battery cell is h2, satisfying h1 > h2.

22. The photovoltaic module according to claim 16, characterized in that, Along the first direction, the width of the battery cell is f, and the length of the first strip or the third strip is c, satisfying c < f.

23. The photovoltaic module according to claim 17, characterized in that, The battery cell comprises n cells, which are arranged at intervals along the first direction; The width of each of the battery cells is f, the gap between two adjacent battery cells is x, and the length of the first strip is d, which satisfies d < n*f + (n-1)*x.

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