Photovoltaic module

Abstract

The embodiment of the invention provides a photovoltaic module, the photovoltaic module comprises glue points, a plurality of battery pieces and a plurality of welding strips, the adjacent battery pieces are connected through the welding strips, and the glue points are used for bonding the welding strips and the battery pieces. The first side of the battery piece is provided with a first connecting area and a second connecting area, the second side of the battery piece is provided with a third connecting area and a fourth connecting area, the first connecting area and the third connecting area are located at the two opposite ends of the battery piece, and the first connecting area is connected with the adjacent third connecting area through a welding strip. The first connecting area and the third connecting area are respectively provided with at least five first glue points, and the second connecting area and the fourth connecting area are respectively provided with second glue points. Through the design, the stability of the connection between the welding strip and the battery piece can be improved, so that the quality of the battery piece can be improved, and the actual use requirements are better met.

Description

Technical Field

[0001] This application relates to the field of photovoltaics, and in particular to a photovoltaic module. Background Art

[0002] With the development of technology, photovoltaic modules have become commonly used devices. A photovoltaic module includes a plurality of solar cells, and adjacent solar cells are connected by welding tapes. However, the connection stability between the welding tape and the solar cell is poor, and the tensile force that can be borne is small. During use, problems such as de-welding and false welding are likely to occur, affecting the quality of the photovoltaic module. Summary of the Invention

[0003] Embodiments of this application provide a photovoltaic module for improving the connection stability between a welding tape and a solar cell.

[0004] Embodiments of this application provide a photovoltaic module, which includes:

[0005] A plurality of solar cells, with at least two solar cells arranged along the length direction of the photovoltaic module;

[0006] A plurality of welding tapes for connecting adjacent solar cells along the length direction of the photovoltaic module;

[0007] Glue dots for bonding the welding tape to the solar cell;

[0008] Wherein, along the thickness direction of the solar cell, the solar cell includes a first side and a second side. The first side is provided with a first connection area and a second connection area, and the second side is provided with a third connection area and a fourth connection area. Along the length direction of the solar cell, the first connection area and the third connection area are located at opposite ends of the solar cell. The first connection area of the solar cell is connected to the third connection area of an adjacent solar cell through the welding tape. The glue dots include a first glue dot and a second glue dot. At least 5 first glue dots are respectively provided on the first connection area and the third connection area, and the second glue dot is provided on the second connection area and the fourth connection area.

[0009] In a possible implementation manner, along the length direction of the photovoltaic module, the distance between the first glue dots located in the same first connection area is 1.5 mm to 2.5 mm, and / or, the distance between the first glue dots located in the same third connection area is 1.5 mm to 2.5 mm.

[0010] In a possible implementation manner, 6 to 8 first glue dots are respectively provided on the first connection area and the third connection area.

[0011] In a possible implementation, along the length direction of the photovoltaic module, the size of the first glue dot is from 1.3 millimeters to 3 millimeters, and along the width direction of the photovoltaic module, the size of the first glue dot is from 2 millimeters to 4 millimeters.

[0012] In a possible implementation, the cell includes a body portion and a harpoon structure. The harpoon structure is disposed on the body portion. Along the length direction of the photovoltaic module, the harpoon structures are respectively disposed at opposite ends of the body portion. The harpoon structure includes a welding member, and the welding ribbon is disposed on the body portion through the welding member. The first connection region is located between the second connection region and the welding member, and the third connection region is located between the fourth connection region and the welding member.

[0013] Along the length direction of the photovoltaic module, the length of the first connection region is from 14 millimeters to 55 millimeters, and the length of the third connection region is from 14 millimeters to 55 millimeters.

[0014] In a possible implementation, 2 to 10 second glue dots are respectively disposed in the second connection region and the fourth connection region.

[0015] In a possible implementation, the welding ribbon includes a first connection segment and a second connection segment. Among the first connection segment and the second connection segment, one is located in the second connection region of the cell, and the other is located in the fourth connection region of another cell. On the same side of the cell, the first connection segment and the second connection segment are spaced apart from each other.

[0016] The spacing between the second glue dots disposed on the first connection segment is m, and the spacing between the second glue dots disposed on the second connection segment is n, and m≠n.

[0017] In a possible implementation, the spacing m between the second glue dots disposed on the first connection segment satisfies: 20 millimeters ≤ m ≤ 32 millimeters, and the spacing n between the second glue dots disposed on the second connection segment satisfies: 30 millimeters ≤ n ≤ 38 millimeters.

[0018] In a possible implementation, along the length direction of the photovoltaic module, the size of the second glue dot is from 1 millimeter to 2 millimeters, and along the width direction of the photovoltaic module, the size of the second glue dot is from 1.5 millimeters to 3 millimeters.

[0019] In a possible implementation, the cell includes a plurality of sub - grids. The sub - grids extend along the width direction of the photovoltaic module, and the sub - grids are spaced apart from each other along the length direction of the photovoltaic module. The welding ribbon is connected to the sub - grids, and the glue dots are disposed at the intersection positions of the welding ribbon and the sub - grids.

[0020] An embodiment of the present application provides a photovoltaic module. The photovoltaic module includes glue dots, a plurality of solar cells, and a plurality of solder tapes. Adjacent solar cells are connected by solder tapes, and the glue dots are used to bond the solder tapes and the solar cells. A first side of the solar cell has a first connection area and a second connection area, and a second side has a third connection area and a fourth connection area. The first connection area and the third connection area are located at opposite ends of the solar cell, and the first connection area is connected to an adjacent first connection area through a solder tape. At least five first glue dots are respectively provided in the first connection area and the third connection area, and second glue dots are respectively provided in the second connection area and the fourth connection area. Through such a design, the connection stability between the solder tape and the solar cell can be improved, thereby improving the quality of the solar cell and better meeting the actual use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 A partial schematic diagram of the photovoltaic module provided by the embodiment of the present application;

[0023] Figure 2 A partial cross-sectional schematic diagram of the photovoltaic module provided by the embodiment of the present application;

[0024] Figure 3 is Figure 1 a partial enlarged view of position I in;

[0025] Figure 4 A schematic diagram of the solar cell provided by the embodiment of the present application;

[0026] Figure 5 A schematic diagram of the printing glue screen provided by the embodiment of the present application.

[0027] REFERENCE NUMERALS

[0028] 1 - Solar cell;

[0029] 11 - First side;

[0030] 111 - First connection area;

[0031] 112 - Second connection area;

[0032] 12 - Second side;

[0033] 121 - Third connection area;

[0034] 122 - Fourth connection area;

[0035] 13 - Body part;

[0036] 14 - Harpoon structure;

[0037] 141 - Welded part;

[0038] 15 - Auxiliary grid;

[0039] 2 - Welding ribbon;

[0040] 21 - First connection section;

[0041] 22 - Second connection section;

[0042] 3 - Adhesive dot;

[0043] 31 - First adhesive dot;

[0044] 32 - Second adhesive dot;

[0045] 4 - Adhesive printing screen. Detailed implementation mode

[0046] For a better understanding of the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0047] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0048] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0049] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0050] As Figure 1 shown, the embodiments of the present application provide a photovoltaic module. The photovoltaic module includes a plurality of cell wafers 1 and a plurality of welding ribbons 2. At least two cell wafers 1 are arranged along the length direction of the photovoltaic module, and adjacent cell wafers 1 are connected by welding ribbons 2 to form a cell string. At least two cell strings are arranged along the width direction of the photovoltaic module to form a cell array. The welding ribbon 2 can be bonded to the cell wafer 1 through an adhesive dot 3. As Figure 2As shown in the figure, along the thickness direction of the cell 1, the cell 1 includes a first side 11 and a second side 12. The first sides 11 of all the cells 1 are located on the same side of the photovoltaic module, and the second sides 12 of all the cells 1 are located on the same side of the photovoltaic module. The first side 11 is provided with a first connection area 111 and a second connection area 112, and the second side 12 is provided with a third connection area 121 and a fourth connection area 122. Along the length direction of the cell 1, the first connection area 111 and the third connection area 121 are located at opposite ends of the cell 1, that is, along the length direction of the cell 1, one end of the cell 1 is provided with the first connection area 111, and the other end is provided with the third connection area 121. When the cells 1 are arranged along the length direction of the photovoltaic module, the first connection area 111 of the cell 1 and the third connection area 121 of the adjacent cell 1 are close to each other. The first connection area 111 of the cell 1 is connected to the third connection area 121 of the adjacent cell 1 through the welding tape 2. The glue dots 3 include a first glue dot 31 and a second glue dot 32. The first glue dot 31 is arranged on the first connection area 111 and the third connection area 121, and the second glue dot 32 is arranged on the second connection area 112 and the fourth connection area 122. The first connection area 111 is provided with at least 5 first glue dots 31. The third connection area 121 is provided with at least 5 first glue dots 31. The number of the first glue dots 31 arranged on the first connection area 111 and the third connection area 121 can be 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0051] Generally, the connection stability between the welding tape 2 and the cell 1 is poor, and the tensile force that can be borne is low. For example, for a 0BB cell without a main grid, the 0BB cell is only provided with a sub-grid 15, and the connection between the welding tape 2 and the cell 1 is only the connection between the welding tape 2 and the sub-grid 15, and the tensile force that can be borne is small, usually not exceeding 0.5N. Moreover, since the expansion coefficients of the welding tape 2 and the cell 1 are inconsistent, during the reliability test, the connection position between the welding tape 2 and the cell 1 is prone to electrical connection failure and other situations. Moreover, since the tensile force between the welding tape 2 and the cell 1 is small, during the lamination process of the photovoltaic module, phenomena such as the offset and de-soldering of the welding tape 2 are likely to occur, affecting the quality and working efficiency of the photovoltaic module.

[0052] In the solution provided by the embodiment of the present application, by arranging the glue dots 3, the welding tape 2 and the cell 1 can be bonded, thereby improving the connection stability between the welding tape 2 and the cell 1. The first connection area 111 and the third connection area 121 are located on the side where the adjacent cells 1 are connected to each other. By respectively arranging at least 5 glue dots 3 on the first connection area 111 and the third connection area 121, the connection stability between the welding tape 2 and the cell 1 can be improved, thereby improving the connection stability of the interconnected side of the cell 1. During the test, the possibility of de-soldering and false soldering of the welding tape 2 can be reduced, which is beneficial to improving the working stability of the photovoltaic module.

[0053] Such as Figure 3As shown, in a possible implementation, along the length direction of the photovoltaic module, the spacing between the first glue dots 31 located in the same first connection area 111 is 1.5 mm to 2.5 mm, and / or the spacing between the first glue dots 31 located in the same third connection area 121 is 1.5 mm to 2.5 mm. That is, the spacing between adjacent first glue dots 31 located in the same connection area is 1.5 mm to 2.5 mm. The spacing between adjacent first glue dots 31 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, etc.

[0054] When the spacing between adjacent first glue dots 31 is less than 1.5 mm, the spacing between adjacent first glue dots 31 is too small. When dispensing glue through the glue printing screen plate 4, the distance between adjacent mesh holes is too close, which will increase the processing difficulty and also reduce the area of the overall glue application area, affecting the strengthening effect of the glue dot 3 on the connection stability of the welding strip 2. When the distance between adjacent first glue dots 31 is greater than 2.5 mm, the spacing between adjacent first glue dots 31 is too large, affecting the glue application effect. Therefore, in the solution provided by the embodiments of the present application, the spacing between adjacent first glue dots 31 can be 1.5 mm to 2.5 mm, which can improve the connection stability between the glue dot 3 and the battery chip 1 while reducing the processing difficulty of the glue printing screen plate 4, and better meet the actual usage requirements.

[0055] In a possible implementation, the first connection area 111 and the second connection area 112 can be respectively provided with 6 to 8 first glue dots 31.

[0056] By optimizing the number of the first glue dots 31, while meeting the connection strength requirement between the welding strip 2 and the battery chip 1, the number of the first glue dots 31 can be reduced as much as possible, thereby improving the processing efficiency and saving costs.

[0057] As Figure 3 shown, in a possible implementation, along the length direction of the photovoltaic module, the size of the first glue dot 31 is b, and 1.3 mm ≤ b ≤ 3 mm. Along the width direction of the photovoltaic module, the size of the first glue dot 31 is c, and 2 mm ≤ c ≤ 4 mm. The size b of the first glue dot 31 can be 1.3 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.7 mm, 2.9 mm, 3.0 mm, etc. The size c of the first glue dot 31 can be 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4.0 mm, etc.

[0058] When the size of the first glue dot 31 is too small, the strengthening effect of the first glue dot 31 on the welding strip 2 is relatively small. When the size of the first glue dot 31 is too large, the dispensing area increases, resulting in an increase in the amount of dispensed glue, higher costs, and at the same time, the glue is prone to overflow. Moreover, the overly large dispensing area leads to an extended curing time, which affects production efficiency and increases the production cycle.

[0059] As Figure 1 shown, in a possible implementation manner, the battery cell 1 may include a body portion 13 and a harpoon structure 14. The harpoon structure 14 is provided on the body portion 13, and the body portion 13 may be a processed silicon wafer or the like. Along the length direction of the photovoltaic module, harpoon structures 14 are respectively provided at opposite ends of the body portion 13, and harpoon structures 14 are provided on both the first side 11 and the second side 12. The harpoon structure 14 includes a welding member 141. The welding strip 2 can be welded to the body portion 13 through the welding member 141. The first connection area 111 is located between the second connection area 112 and the welding member 141. The third connection area 121 is located between the fourth connection area 122 and the welding member 141. Along the length direction of the photovoltaic module, the length of the first connection area 111 is 14 millimeters to 55 millimeters, and the length of the third connection area 121 is 14 millimeters to 55 millimeters.

[0060] In a possible implementation manner, the shape of the first glue dot 31 can be approximately rectangular, and the area can be 2.6 square millimeters to 12 square millimeters.

[0061] By controlling the area of the first glue dot 31 within a suitable range, the stability of the connection between the welding strip 2 and the battery cell 1 can be improved while saving costs.

[0062] As Figure 1 、 Figure 2 and Figure 4As shown, among two adjacent solar cells 1, the first connection region 111 of one cell and the third connection region 121 of the other cell are located at one end where the two solar cells 1 are close to each other, and the second connection region 112 and the fourth connection region 122 are located at one end where the two solar cells 1 are far from each other. Along the length direction of the photovoltaic module, the region within a distance of 14 mm to 55 mm from the welding part 141 on the first side 11 of the solar cell 1 into the solar cell 1 is the first connection region 111, and the remaining region of the first side 11 can be used as the second connection region 112. The region within a distance of 14 mm to 55 mm from the welding part 141 on the second side 12 of the solar cell 1 into the solar cell 1 is the third connection region 121, and the remaining region of the second side 12 can be used as the fourth connection region 122. The lengths of the first connection region 111 and the third connection region 121 can be 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, 32 mm, 34 mm, 36 mm, 38 mm, 40 mm, 42 mm, 44 mm, 46 mm, 48 mm, 50 mm, 52 mm, 54 mm, 55 mm, etc.

[0063] When the lengths of the first connection region 111 and the third connection region 121 are less than 14 mm, the sizes of the first connection region 111 and the third connection region 121 are too small, and the space for setting the first glue dots 31 is too small, which will lead to a reduction in the number of the first glue dots 31 and affect the bonding stability between the welding tape 2 and the solar cell 1. Moreover, it will cause the arrangement of the first glue dots 31 to be too dense, increasing the difficulty of dispensing glue. When the lengths of the first connection region 111 and the third connection region 121 are greater than 55 mm, the sizes of the first connection region 111 and the third connection region 121 are too large, which will lead to an increase in the spacing between the first glue dots 31 and affect the bonding stability between the welding tape 2 and the solar cell 1.

[0064] In a possible implementation manner, there are respectively 2 to 10 second glue dots 32 provided in the second connection region 112 and the fourth connection region 122. The number of the second glue dots 32 can be 2, 3, 4, 5, 6, 7, 8, 9, 10.

[0065] When the number of the second glue dots 32 is too small, the bonding stability between the welding tape 2 and the solar cell 1 decreases. When the number of the second glue dots 32 is too large, it will lead to an increase in the overall glue dispensing amount, which will not only increase the cost but also affect the processing efficiency. Therefore, the number of the second glue dots 32 can generally be 2 to 10, which can control the production cost while meeting the bonding stability, and is more in line with the actual use requirements.

[0066] Such as Figure 1 and Figure 2As shown, in a possible implementation, the solder ribbon 2 may include a first connection segment 21 and a second connection segment 22 that are connected to each other. Among the first connection segment 21 and the second connection segment 22, one is located in the second connection area 112, and the other is located in the fourth connection area 122 of another solar cell 1. The photovoltaic module includes a plurality of solder ribbons 2. On the same side of the solar cell 1, the first connection segments 21 and the second connection segments 22 are arranged at intervals from each other. That is, along the arrangement direction of the solder ribbon 2, the two sides of the first connection segment 21 are respectively the second connection segments 22 of other solder ribbons 2, and the two sides of the second connection segment 22 are respectively the first connection segments 21 of other solder ribbons 2. The distance between the second glue dots 32 provided on the first connection segment 21 is m, and the distance between the second glue dots 32 provided on the second connection segment 22 is n, and m≠n.

[0067] Through such a design, the second glue dots 32 of adjacent solder ribbons 2 can be arranged in a staggered manner, which is beneficial to improving the connection stability between the solder ribbon 2 and the solar cell 1, and is also beneficial to saving the quantity of the second glue dots 32, thereby saving the glue application amount.

[0068] As Figure 1 shown, in a possible implementation, the distance m between the second glue dots 32 provided on the first connection segment 21 satisfies: 20 mm ≤ m ≤ 32 mm, and the distance n between the second glue dots 32 provided on the second connection segment 22 satisfies 30 mm ≤ n ≤ 38 mm. The value of m can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, etc. The value of n can be 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, etc.

[0069] By controlling the distance between adjacent second glue dots 32, the second glue dots 32 can be evenly distributed on the solder ribbon 2, thereby improving the connection stability between the solder ribbon 2 and the solar cell 1.

[0070] The first connection segment 21 and the second connection segment 22 of the same solder ribbon 2 can be respectively connected to different solar cells 1. Since the distance between the second glue dots 32 of the second connection segment 22 is relatively large, the number of the second glue dots 32 located on the second connection segment 22 can be less than the number of the second glue dots 32 of the first connection segment 21, thereby reducing the overall glue application amount to save costs.

[0071] In a possible implementation, the first connection section 21 of one solder ribbon 2 is disposed in the second connection area 112 of the previous solar cell 1, and the second connection section 22 is disposed in the fourth connection area 122 of the subsequent solar cell 1. The arrangement of the solder ribbon 2 adjacent to this solder ribbon 2 is such that the second connection section 22 is disposed in the second connection area 112 of the previous solar cell 1, and the first connection section 21 is disposed in the fourth connection area 122 of the subsequent solar cell 1.

[0072] By such an arrangement, the connection stability between the solder ribbon 2 and the adjacent solar cells 1 can be balanced, thereby reducing the possibility of solder joint detachment between the solder ribbon 2 and the solar cells 1.

[0073] As Figure 4 shown, in a possible implementation, along the length direction of the photovoltaic module, the size of the second glue dot 32 is f, and 1 mm ≤ f ≤ 2 mm. Along the width direction of the photovoltaic module, the size of the second glue dot 32 is g, and 1.5 mm ≤ g ≤ 3 mm. f can be 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, etc. g can be 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.7 mm, 2.9 mm, 3.0 mm, etc.

[0074] When the size of the second glue dot 32 is too small, the bonding ability of the second glue dot 32 will decrease, thereby affecting the bonding stability between the solder ribbon 2 and the solar cell 1. When the size of the second glue dot 32 is too large, the amount of glue dispensing will increase, thereby increasing the cost.

[0075] In a possible implementation, the solar cell 1 includes a plurality of sub-grids 15, and the sub-grids 15 can be disposed on the body portion 13 of the solar cell 1. The sub-grids 15 extend along the width direction of the photovoltaic module, and the sub-grids 15 are spaced apart along the length direction of the photovoltaic module. The solder ribbons 2 extend along the length direction of the photovoltaic module, and the solder ribbons 2 are arranged along the width direction of the photovoltaic module. The solder ribbons 2 are connected to the sub-grids 15, and the glue dots 3 are disposed at the intersection positions of the solder ribbons 2 and the sub-grids 15.

[0076] The sub-grids 15 are used to collect the photo-generated current generated by the solar cell 1. The solder ribbons 2 can be connected to the sub-grids 15 for leading out the current collected by the sub-grids 15. By disposing the glue dots 3 at the connection positions of the solder ribbons 2 and the sub-grids 15, the connection stability between the solder ribbons 2 and the sub-grids 15 can be improved, thereby facilitating the solder ribbons 2 to collect the current of the sub-grids 15 to improve the overall quality and efficiency of the photovoltaic module.

[0077] When manufacturing a photovoltaic module, the structure of the glue printing stencil 4 can be as Figure 5As shown, dispensing holes are set on the glue - printing stencil 4 according to the positions of the glue dots 3. The glue - printing stencil 4 can be provided with a dense dispensing area and a staggered dispensing area. The dense dispensing area can correspond to the first connection area 111 and the third connection area 121 of the solar cell 1, and is used to set the first glue dots 31. The staggered dispensing area can correspond to the second connection area 112 and the fourth connection area 122 of the solar cell 1, and is used to set the second glue dots 32.

[0078] In the solution provided by the embodiment of the present application, by respectively setting at least 5 first glue dots 31 on the interconnected sides of adjacent solar cells 1, the connection stability between the solder tape 2 and the solar cell 1 can be improved, thereby reducing the occurrence of solder joint detachment and false soldering of the solder tape 2, which is beneficial to improving the quality of the photovoltaic module.

[0079] In a possible implementation manner, in the photovoltaic module provided by the embodiment of the present application, the solar cell 1 can be a PERC cell, a TOPCon cell, an HJT cell, an IBC cell, etc. The solar cell 1 can be a solar cell 1 with main grids or a solar cell 1 without main grids.

[0080] During production, different process flows can be selected according to requirements. For example, the solder tape 2 can be arranged first and then glue is dispensed, or glue is dispensed first and then the solder tape 2 is arranged.

[0081] In a possible implementation manner, multiple solar cells 1 can be arranged along the first direction first, and the first direction can correspond to the length direction of the photovoltaic module. The solder tape 2 is connected to the corresponding solar cell 1. The solder tape 2 and the solar cell 1 are pre - welded to make the solder tape 2 and the solar cell 1 relatively fixedly connected. The solder tape 2 and the solar cell 1 can be used to form a battery string, and the battery string is set in the glue - printing device. The glue - printing stencil 4 is placed on the battery string. The glue - printing stencil 4 is provided with mesh holes, and the positions of the mesh holes correspond to the positions of the glue dots 3. Glue is set on the glue - printing stencil 4, and the glue is scraped into the mesh holes through the squeegee of the glue - printing device so that the glue contacts the solder tape 2 and the solar cell 1. Then the battery string with dispensing completed is transferred to the curing device for curing.

[0082] In a possible implementation manner, the solar cell 1 can be dispensed with glue first. The solar cell 1 is placed in the glue - printing device, the glue - printing stencil 4 is set corresponding to each solar cell 1, glue is set on the glue - printing stencil 4, and the glue is scraped into the mesh holes through the squeegee so that the glue contacts the solar cell 1 to form glue dots. The solar cell 1 with glue dots is taken off from the glue - printing device, and each solar cell 1 is arranged along the first direction, and the first direction can correspond to the length direction of the photovoltaic module. Adjacent solar cells 1 are connected by the solder tape 2 and welded. The solar cell 1 and the solder tape 2 are used to form a battery string. The battery string is put into the curing device for curing.

[0083] The performance of the battery string obtained by first setting the solder ribbon 2 and then setting the glue dots 3 is approximately the same as that obtained by first setting the glue dots 3 and then setting the solder ribbon 2, and they have the same technical effects.

[0084] Arrange the obtained battery strings in the second direction, and the second direction can be the same as the width direction of the photovoltaic module. According to the requirements of the photovoltaic module, a certain number of solar cells 1 are connected to form a battery string, and then a certain number of battery strings are arranged to form a battery array. The photovoltaic module may further include a first cover plate, a first encapsulant film, a second cover plate, and a second encapsulant film. The first encapsulant film and the second encapsulant film are located on opposite sides of the battery array in the thickness direction of the photovoltaic module, the first cover plate is located on the side of the first encapsulant film away from the battery array, and the second cover plate is located on the side of the second encapsulant film away from the battery array.

[0085] In a possible implementation manner, the first cover plate may be located on the light-receiving side of the photovoltaic module, and the second cover plate may be located on the backlight side of the photovoltaic module. The first cover plate may be a light-transmitting structure such as glass. The second cover plate may be a reflective structure or a reflective material. The light passes through the first cover plate and the first encapsulant film and then reaches the battery array. The solar cell 1 absorbs the light and generates a photocurrent. The sub-grid 15 is used to collect the photocurrent, and the solder ribbon 2 is used to lead out the photocurrent of the grid line. The light that is not absorbed by the solar cell 1 passes through the solar cell 1 and the second encapsulant film and reaches the second cover plate. The second cover plate can reflect the light in the direction of the battery array, so that the battery array can absorb the light again, thereby improving the absorption efficiency of the solar cell and being beneficial to improving the overall efficiency of the photovoltaic module.

[0086] In a possible implementation manner, both sides of the photovoltaic module are light-receiving sides, and both the first cover plate and the second cover plate are light-transmitting structures. When in use, both opposite sides of the photovoltaic module can be used to absorb light, which is beneficial to improving the efficiency of the photovoltaic module.

[0087] The first encapsulant film and the second encapsulant film can play a role in connecting the cover plate and the solar cell 1 to a certain extent. At the same time, the first encapsulant film and the second encapsulant film can also play a role in buffering and shock absorption. When the photovoltaic module is impacted, it can be buffered by the first encapsulant film and the second encapsulant film, thereby reducing the possibility of the solar cell 1 having hidden cracks, breakage, etc., being beneficial to improving the service life of the photovoltaic module and more meeting the actual use requirements.

[0088] An embodiment of the present application provides a photovoltaic module. The photovoltaic module includes glue dots 3, a plurality of solar cells 1, and a plurality of solder tapes 2. Adjacent solar cells 1 are connected by solder tapes 2, and the glue dots 3 are used to bond the solder tapes 2 and the solar cells 1. A first side 11 of the solar cell 1 has a first connection area 111 and a second connection area 112, and a second side 12 has a third connection area 121 and a fourth connection area 122. The first connection area 111 and the third connection area 121 are located at opposite ends of the solar cell 1, and the first connection area 111 is connected to the adjacent third connection area 121 through a solder tape 2. At least five first glue dots 31 are respectively provided on the first connection area 111 and the third connection area 121, and second glue dots 32 are respectively provided on the second connection area 112 and the fourth connection area 122. Through such a design, the stability of the connection between the solder tape 2 and the solar cell 1 can be improved, thereby improving the quality of the solar cell 1 and better meeting the actual use requirements.

[0089] The structure, features, and effects of the present application have been described in detail based on the embodiments shown in the drawings above. The above are only the preferred embodiments of the present application, but the present application is not limited to the implementation scope shown in the drawings. Any changes made according to the concept of the present application, or equivalent embodiments modified into equivalent changes, should still be within the protection scope of the present application as long as they do not exceed the spirit covered by the specification and the drawings.

Claims

1. A photovoltaic module, characterized in that: The photovoltaic module comprises: A plurality of solar cells (1), at least two solar cells (1) being arranged along the length direction of the photovoltaic module; A plurality of welding strips (2), the welding strips (2) being used to connect the adjacent battery cells (1) along the length direction of the photovoltaic module; Glue dots (3), the glue dots (3) being used to adhere the solder strip (2) to the battery cell (1); Wherein, along the thickness direction of the battery cell (1), the battery cell (1) comprises a first side (11) and a second side (12), the first side (11) is provided with a first connection area (111) and a second connection area (112), the second side (12) is provided with a third connection area (121) and a fourth connection area (122), along the length direction of the battery cell (1), the first connection area (111) and the third connection area (121) are located at opposite ends of the battery cell (1), the first connection area (111) of the battery cell (1) is connected to the third connection area (121) of the adjacent battery cell (1) through the welding strip (2), the glue point (3) comprises a first glue point (31) and a second glue point (32), the first connection area (111) and the third connection area (121) are respectively provided with at least five of the first glue points (31), and the second connection area (112) and the fourth connection area (122) are provided with the second glue point (32).

2. The photovoltaic module according to claim 1, characterized in that: Along the length direction of the photovoltaic module, the distance between each of the first glue points (31) located in the same first connection area (111) is 1.5 mm to 2.5 mm, and / or the distance between each of the first glue points (31) located in the same third connection area (121) is 1.5 mm to 2.5 mm.

3. The photovoltaic module according to claim 1, characterized in that: The first connection area (111) and the third connection area (121) are respectively provided with 6 to 8 first glue dots (31).

4. The photovoltaic module according to claim 1, characterized in that: Along the length direction of the photovoltaic module, the size of the first glue point (31) is 1.3 mm to 3 mm, and along the width direction of the photovoltaic module, the size of the first glue point (31) is 2 mm to 4 mm.

5. The photovoltaic module according to claim 1, characterized in that: The solar cell (1) comprises a main body (13) and a harpoon structure (14), the harpoon structure (14) being arranged on the main body (13), and the harpoon structures (14) being arranged at opposite ends of the main body (13) along the length direction of the photovoltaic module, respectively, the harpoon structure (14) comprising a welding piece (141), the welding strip (2) being arranged on the main body (13) via the welding piece (141), the first connection area (111) being located between the second connection area (112) and the welding piece (141), and the third connection area (121) being located between the fourth connection area (122) and the welding piece (141); Along the length direction of the photovoltaic component, the length of the first connection area (111) is 14 mm to 55 mm, and the length of the third connection area (121) is 14 mm to 55 mm.

6. The photovoltaic module according to any one of claims 1 to 5, characterized in that: The second connection area (112) and the fourth connection area (122) are respectively provided with 2 to 10 second glue dots (32).

7. The photovoltaic module according to claim 6, characterized in that: The welding strip (2) comprises a first connecting section (21) and a second connecting section (22); one of the first connecting section (21) and the second connecting section (22) is located at a second connecting area (112) of the battery cell (1), and the other is located at a fourth connecting area (122) of another battery cell (1); and on the same side of the battery cell (1), the first connecting section (21) and the second connecting section (22) are arranged to be spaced apart from each other; The spacing between the second glue points (32) arranged on the first connecting section (21) is m, the spacing between the second glue points (32) arranged on the second connecting section (22) is n, and m≠n.

8. The photovoltaic module according to claim 7, characterized in that: The spacing m between the second glue points (32) arranged on the first connecting section (21) satisfies: 20 mm ≤ m ≤ 32 mm, and the spacing n between the second glue points (32) arranged on the second connecting section (22) satisfies: 30 mm ≤ n ≤ 38 mm.

9. The photovoltaic module according to any one of claims 1 to 5, characterized in that: Along the length direction of the photovoltaic component, the size of the second glue point (32) is 1 mm to 2 mm, and along the width direction of the photovoltaic component, the size of the second glue point (32) is 1.5 mm to 3 mm.

10. The photovoltaic module according to any one of claims 1 to 5, characterized in that: The cell sheet (1) comprises a plurality of auxiliary grids (15), wherein the auxiliary grids (15) extend along the width direction of the photovoltaic module, and the auxiliary grids (15) are arranged at intervals along the length direction of the photovoltaic module. The welding strip (2) is connected to the auxiliary grids (15), and the glue point (3) is arranged at the intersection of the welding strip (2) and the auxiliary grids (15).

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