Solar photovoltaic module and manufacturing method therefor

Abstract

The present application relates to the technical field of solar cells, and specifically relates to a solar photovoltaic module and a manufacturing method therefor. The module comprises: a first cell module and a second cell module; each cell string comprises a plurality of cell strips connected in series; the plurality of cell strips in each cell string are sequentially arranged without interruption, and every two adjacent cell strings are sequentially arranged without interruption; the first module and the second module form a fully covered cell sheet; a first insulating strip is provided in a first region, and the first insulating strip passes through a first wiring hole; a second insulating strip is provided in a second region, and the second insulating strip passes through a second wiring hole; a first bus bar is provided on the first insulating strip; a second bus bar is provided on the second insulating strip; a third bus bar is provided in a third region, and the third bus bar passes through a third wiring hole; the first bus bar is welded to the third bus bar; and the second bus bar is welded to the third bus bar. A blank region on the front side of the photovoltaic module is avoided, and the product conversion efficiency is improved.

Description

A solar photovoltaic module and its manufacturing method

[0001] Cross-referencing

[0002] This application claims priority to Chinese Patent Application No. 2024111898549, filed on August 27, 2024, entitled "A Solar Photovoltaic Module and a Method for Manufacturing the Same", the contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of solar cell technology, and more specifically, to a solar photovoltaic module and a method for manufacturing the same. Background Technology

[0004] Currently, the technologies of modules in the industry are converging, and the mainstream module products in the industry are mainly half-cell module designs. The circuit structure manufacturing process of half-cell module products is all outside the cell string, which has the advantages of simple process and low implementation difficulty.

[0005] However, the large amount of blank space inside the half-cell module means that the front of the product needs to have some empty space for the busbar arrangement, which makes it impossible to achieve the busbar obscuring / hiding arrangement design, greatly reducing the product conversion efficiency.

[0006] Moreover, because half-cell modules require a blank space between the upper and lower quadrants for circuit leads, this design necessitates an increase in module length, further reducing product conversion efficiency.

[0007] Application content

[0008] The purpose of this application is to provide a solar photovoltaic module and its manufacturing method, thereby solving the problem of low conversion efficiency in existing half-cell module products.

[0009] In a first aspect, this application provides a solar photovoltaic module, which includes: a first battery module and a second battery module; both the first battery module and the second battery module include multiple battery strings connected in parallel; each battery string includes multiple battery bars connected in series; the multiple battery bars in each battery string are arranged sequentially without interruption, and adjacent battery strings are arranged sequentially without interruption; the first battery module and the second battery module form a fully covered solar cell; the second battery module is connected in series with the first battery module.

[0010] The solar photovoltaic module includes: a first region, a second region, and a third region;

[0011] The third region includes a portion of the battery bars in each battery string of the first battery module and a portion of the battery bars in each battery string of the second battery module; the first region includes another portion of the battery bars in each battery string of the first battery module, and the second region includes another portion of the battery bars in each battery string of the second battery module; the first region is provided with a first wiring hole; the second region is provided with a second wiring hole; and the third region is provided with a third wiring hole.

[0012] On the back of the solar photovoltaic module:

[0013] Insulating pads are installed at the first wiring hole, the second wiring hole and the third wiring hole;

[0014] The first area is provided with a first insulating strip, and the first insulating strip passes through a first wiring hole; the second area is provided with a second insulating strip, and the second insulating strip passes through a second wiring hole;

[0015] A first busbar is provided on the first insulating strip; a second busbar is provided on the second insulating strip; a third busbar is provided in the third area, and the third busbar passes through a third wiring hole;

[0016] The first busbar is welded to the third busbar; the second busbar is welded to the third busbar.

[0017] In existing half-cell modules, short strings of cells are commonly used, leaving blank areas in the middle. In this application, each cell string of the solar photovoltaic module includes multiple series-connected cell strips; these strips are arranged sequentially without interruption, and adjacent strings are also arranged sequentially without interruption; the first and second modules form a full-coverage cell array, thus avoiding blank areas. Furthermore, this application uses a parallel-then-series connection method for the cell strings, and insulating strips (first and second busbars) are installed in the first and second regions on the back of the solar photovoltaic module, and a third busbar is installed in the third region, avoiding the need for current-carrying busbars in the blank areas on the front of the photovoltaic module. Therefore, compared to existing half-cell modules, this application eliminates the need for blank areas in the upper and lower quadrants of the cell front for circuit routing, thus avoiding increased module length and improving product conversion efficiency.

[0018] In other embodiments of this application, at least one layer of insulating pads is provided on the upper and lower sides of the first insulating strip and the second insulating strip; or at least two layers of insulating pads are provided on the lower side of the first insulating strip and the second insulating strip.

[0019] In other embodiments of this application, at least one insulating pad is provided between the battery bar and the third bus bar.

[0020] In other embodiments of this application, the spacing between battery strings is 1mm to 3mm;

[0021] The first region is provided with a first insulating strip with a width of 20mm to 30mm, and the first insulating strip passes through the first wiring hole; and / or the second region is provided with a second insulating strip with a width of 20mm to 30mm, and the second insulating strip passes through the second wiring hole.

[0022] In other embodiments of this application, the width of the first busbar and the second busbar is 4.5mm to 5.5mm.

[0023] In other embodiments of this application, a first insulating strip with a thickness of 0.25 mm to 0.35 mm is provided in the first region, and the first insulating strip passes through the first wiring hole; and / or

[0024] The second area is provided with a second insulating strip with a thickness of 0.25mm to 0.35mm, and the second insulating strip passes through the second wiring hole.

[0025] In other embodiments of this application, the thickness of the first busbar and the second busbar is 0.12 mm to 0.18 mm.

[0026] In other embodiments of this application, the thickness of the third busbar is 0.05 mm to 0.1 mm; and / or the width of the third busbar is 6 mm to 8 mm.

[0027] In other embodiments of this application, the third busbar is connected to the solder strip on the back of the solar photovoltaic module.

[0028] In other embodiments of this application, an insulating material is provided at the third wiring hole.

[0029] Secondly, this application provides a method for manufacturing a solar photovoltaic module. The solar photovoltaic module includes: a first battery module and a second battery module; both the first battery module and the second battery module include multiple battery strings connected in parallel; each battery string includes multiple battery strips connected in series; the multiple battery strips in each battery string are arranged sequentially without interruption, and adjacent battery strings are arranged sequentially without interruption; the first battery module and the second battery module form a fully covered solar cell; the second battery module is connected in series with the first battery module.

[0030] The solar photovoltaic module includes: a first region, a second region, and a third region;

[0031] The third region includes a portion of the battery bars in each battery string of the first battery module and a portion of the battery bars in each battery string of the second battery module; the first region includes another portion of the battery bars in each battery string of the first battery module, and the second region includes another portion of the battery bars in each battery string of the second battery module; the first region is provided with a first wiring hole; the second region is provided with a second wiring hole; and the third region is provided with a third wiring hole.

[0032] The manufacturing method includes: setting insulating pads on the back of a solar photovoltaic module at a first wiring hole, a second wiring hole, and a third wiring hole; setting a first insulating strip in a first area, with the first insulating strip passing through the first wiring hole; and setting a second insulating strip in a second area, with the second insulating strip passing through the second wiring hole.

[0033] A first busbar is installed on a first insulating strip; a second busbar is installed on a second insulating strip; a third busbar is installed in a third region, and the third busbar passes through a third wiring hole;

[0034] The first busbar is welded to the third busbar; the second busbar is welded to the third busbar;

[0035] Fix the first busbar and the second busbar.

[0036] In the above technical solution, the solar photovoltaic modules employ a parallel-then-series connection method to arrange the cell strings. Furthermore, insulating strips are installed on the back of the solar photovoltaic modules in the first and second regions, respectively, and a third busbar is installed in the third region, thus avoiding blank areas on the front of the photovoltaic module. Compared to the commonly used half-cell modules in existing technologies, there is no need to leave blank areas for circuit leads in the middle of the upper and lower quadrants on the front of the cells; therefore, the module length is not increased, which is beneficial to improving product conversion efficiency.

[0037] In other embodiments of this application, the provision of insulating pads in the first wiring hole and the second wiring hole includes:

[0038] At least one layer of insulating pads is provided on the upper and lower sides of the first insulating strip and the second insulating strip, respectively; or

[0039] At least two layers of insulating pads are provided on the underside of the first insulating strip and the second insulating strip.

[0040] In other embodiments of this application, an insulating pad is provided in the third wiring hole, including:

[0041] At least one insulating pad is placed between the battery bar and the third busbar.

[0042] In other embodiments of this application, the spacing between battery strings is 1mm to 3mm;

[0043] A first insulating strip is installed in a first area, and the first insulating strip passes through a first wiring hole, including:

[0044] A first insulating strip with a width of 20mm to 30mm is provided in the first area, and the first insulating strip passes through the first wiring hole; and / or

[0045] A second insulating strip is installed in the second area, and the second insulating strip passes through the second wiring hole, including:

[0046] A second insulating strip with a width of 20mm to 30mm is installed in the second area, and the second insulating strip passes through the second wiring hole.

[0047] In other embodiments of this application, the width of the first busbar and the second busbar is 4.5mm to 5.5mm.

[0048] In other embodiments of this application, a first insulating strip is provided in a first region, and the first insulating strip passes through a first wiring hole, including:

[0049] A first insulating strip with a thickness of 0.25mm to 0.35mm is provided in the first area, and the first insulating strip passes through the first wiring hole; and / or

[0050] A first insulating strip is installed in the second area, and a second insulating strip passes through a second wiring hole, including:

[0051] A second insulating strip with a thickness of 0.25mm to 0.35mm is installed in the second area, and the second insulating strip passes through the second wiring hole.

[0052] In other embodiments of this application, the thickness of the first busbar and the second busbar is 0.12 mm to 0.18 mm.

[0053] In other embodiments of this application, the thickness of the third busbar is 0.05 mm to 0.1 mm.

[0054] In other embodiments of this application, the width of the third busbar is 6mm to 8mm.

[0055] In other embodiments of this application, fixing the first busbar and the second busbar includes:

[0056] The first busbar and the second busbar are fixed with the first adhesive tape.

[0057] In other embodiments of this application, the manufacturing method further includes welding the third busbar to the solder strip on the back of the solar photovoltaic module.

[0058] In other embodiments of this application, the manufacturing method further includes providing an insulating material at the third wiring hole. Attached Figure Description

[0059] Figure 1 is a structural schematic diagram of a solar photovoltaic module provided in an embodiment of this application;

[0060] Figure 2 is a structural schematic diagram of a solar photovoltaic module provided in an embodiment of this application;

[0061] Figure 3 is a structural schematic diagram of a solar photovoltaic module provided in an embodiment of this application;

[0062] Figure 4 is a partially enlarged structural schematic diagram of the solar photovoltaic module provided in the embodiment of this application.

[0063] Icons: 100 - Solar photovoltaic module; 110 - First battery module; 120 - Second battery module; 130 - Battery string; 140 - Battery strip; A - First area; B - Second area; C - Third area; 150 - First wiring hole; 160 - Second wiring hole; 170 - Third wiring hole; 171 - Insulating material; 180 - Insulating pad; 190 - First insulating strip; 192 - Second insulating strip; 193 - First busbar; 194 - Second busbar; 195 - Third busbar; 196 - Fourth busbar; 197 - Fifth busbar; 198 - First tape; 199 - Second tape. Detailed Implementation

[0064] The embodiments of this application will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of this application. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0065] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0066] In the description of the embodiments of this application, it should be understood that the terms "upper", "left", "right", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this application and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0067] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0068] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] Referring to Figures 1 to 4, this application provides a solar photovoltaic module 100, which includes a first battery module 110 and a second battery module 120. Both the first battery module 110 and the second battery module 120 include multiple parallel-connected battery strings 130. Each battery string 130 includes multiple series-connected battery strips 140. The multiple battery strips 140 in each battery string 130 are arranged sequentially without interruption, and adjacent battery strings 130 are arranged sequentially without interruption. The first battery module 110 and the second battery module 120 form a fully covered solar panel.

[0070] The second battery module 120 is connected in series with the first battery module 110;

[0071] The solar photovoltaic module 100 includes: a first region A, a second region B, and a third region C;

[0072] The third region C includes a portion of battery bars 140 of each battery string 130 in the first battery module 110 and a portion of battery bars 140 of each battery string 130 in the second battery module 120; the first region A includes another portion of battery bars 140 of each battery string 130 in the first battery module 110; the second region B includes another portion of battery bars 140 of each battery string 130 in the second battery module 120; the first region A is provided with a first wiring hole 150; the second region B is provided with a second wiring hole 160; and the third region C is provided with a third wiring hole 170.

[0073] On the back of the solar photovoltaic module 100:

[0074] Insulating pads 180 are provided at the first wiring hole 150, the second wiring hole 160 and the third wiring hole 170;

[0075] The first region A is provided with a first insulating strip 190, and the first insulating strip 190 passes through the first wiring hole 150; the second region B is provided with a second insulating strip 192, and the second insulating strip 192 passes through the second wiring hole 160.

[0076] A first busbar 193 is provided on the first insulating strip 190; a second busbar 194 is provided on the second insulating strip 192; a third busbar 195 is provided in the third region C, and the third busbar 195 passes through the third wiring hole 170;

[0077] The first busbar 193 is welded to the third busbar 195; the second busbar 194 is welded to the third busbar 195;

[0078] The first bus bar 193 and the second bus bar 194 are fixed.

[0079] In existing half-cell modules, short strings of cells are commonly used, leaving blank areas in the middle. In this application, each cell string 130 of the solar photovoltaic module 100 includes multiple series-connected cell strips 140. These strips are arranged sequentially without interruption, and adjacent strings are also arranged sequentially without interruption. The first cell module 110 and the second cell module 120 form a full-coverage cell array, thus avoiding blank areas. Furthermore, this application uses a parallel-then-series connection method for the cell strings 130, and insulating strips (first busbar 193 and second busbar 194) are installed in the first region A and the second region B on the back of the solar photovoltaic module 100, and a third busbar 195 is installed in the third region, avoiding the need for current-carrying busbars in blank areas on the front of the photovoltaic module. Therefore, compared to existing half-cell modules, this application eliminates the need for blank areas in the upper and lower quadrants of the front of the cells for circuit routing, thus avoiding increased module length and improving product conversion efficiency.

[0080] Furthermore, the above technical solution, by adopting a parallel-then-series connection method to set up the battery string, and setting the first busbar 193, the second busbar 194 and the third busbar 195 in the first region A, the second region B and the third region C on the back of the solar photovoltaic module 100, can fully fill the battery and improve the product conversion efficiency.

[0081] In other embodiments of this application, at least one layer of insulating pad 180 is provided on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192, respectively; or

[0082] At least two layers of insulating pads 180 are provided on the lower side of the first insulating strip 190 and the second insulating strip 192.

[0083] In the above technical solution, by setting at least one layer of insulating pad 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 respectively, an insulating function can be achieved, separating the battery cell and the busbar, which helps to prevent the busbar with potential difference from touching the battery cell and causing a short circuit.

[0084] In other embodiments of this application, at least one insulating pad 180 is provided between the battery strip 140 and the third busbar 195.

[0085] In the above technical solution, by setting at least one layer of insulating pad 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 respectively, the insulation effect can be further improved, the battery cell and the busbar can be separated, and it is further beneficial to prevent the busbar with potential difference from coming into contact with the battery cell and causing a short circuit.

[0086] In other embodiments of this application, the spacing between the battery strings 130 is 1mm to 3mm;

[0087] The first area A is provided with a first insulating strip 190 with a width of 20mm to 30mm, and the first insulating strip 190 passes through the first wiring hole 150; and / or

[0088] The second area B is provided with a second insulating strip 192 with a width of 20mm to 30mm, and the second insulating strip 192 passes through the second wiring hole 160.

[0089] In the above technical solution, the string spacing of the battery string 130 is set to 1mm to 3mm, which is beneficial to the manufacturing of solar photovoltaic modules and to the overall performance of photovoltaic modules, such as appearance.

[0090] For example, in some embodiments of this application, the spacing between the battery strings 130 is 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, or any two of the aforementioned values.

[0091] Further optionally, the distance from the battery string 130 to the long side of the glass can be set to 12.5mm to 14.5mm. Exemplarily, in some embodiments of this application, the distance from the battery string 130 to the long side of the glass is 12.5mm, 12.8mm, 12.9mm, 13mm, 13.2mm, 13.5mm, 13.8mm, 14mm, 14.2mm, 14.3mm, 14.5mm, or a range between any two of the aforementioned values.

[0092] Further optionally, the distance from the battery string 130 to the short side of the glass can be set to 19mm to 21mm. Exemplarily, in some embodiments of this application, the distance from the battery string 130 to the short side of the glass is 19mm, 19.2mm, 19.3mm, 19.5mm, 19.8mm, 20mm, 20.5mm, 20.8mm, 21mm, or a range between any two of the aforementioned values.

[0093] Further alternatively, in some embodiments of this application, the battery string 130 described above may be fixed with a second tape 199.

[0094] Furthermore, in some embodiments of this application, a first insulating strip 190 with a width of 20mm to 30mm is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150; this can effectively meet the requirements for the spacing between battery strings and prevent problems such as increased spacing between battery strings in the subsequently obtained solar photovoltaic module; thereby helping to ensure the conversion efficiency of the solar photovoltaic module.

[0095] For example, in some embodiments of this application, the width of the first insulating strip 190 is 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm or any two of the aforementioned values.

[0096] Furthermore, in some embodiments of this application, a second insulating strip 192 with a width of 20mm to 30mm is provided in the second region B, and the second insulating strip 192 passes through the second wiring hole 160; this can effectively meet the requirements for the spacing between battery strings and prevent problems such as increased spacing between battery strings in the subsequently obtained solar photovoltaic module; thereby helping to ensure the conversion efficiency of the solar photovoltaic module.

[0097] For example, in some embodiments of this application, the width of the second insulating strip 192 is 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm or any two of the aforementioned values.

[0098] Furthermore, in some embodiments of this application, the width of the first busbar 193 and the second busbar 194 is 4.5mm to 5.5mm.

[0099] In the above technical solution, by setting the width of the first busbar 193 and the second busbar 194 to be 4.5mm to 5.5mm, it is beneficial to prevent problems such as increased spacing between cell strings and the appearance of spacing steps in the subsequently obtained solar photovoltaic modules; thereby, it is beneficial to improve the front appearance of the photovoltaic modules; and thus, it is beneficial to ensure the conversion efficiency of the solar photovoltaic modules.

[0100] For example, the width of the first busbar 193 and the second busbar 194 is 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm or any two of the aforementioned values.

[0101] In other embodiments of this application, a first insulating strip 190 with a thickness of 0.25 mm to 0.35 mm is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150.

[0102] The above technical solution, by setting a first insulating strip 190 with a thickness of 0.25mm to 0.35mm in the first region A, helps to prevent problems such as increased spacing between cell strings, spacing steps, and bubbles at the edges of solder ribbons in the subsequently obtained solar photovoltaic modules; thus, it helps to improve the front appearance of the photovoltaic modules; and thus helps to ensure the conversion efficiency of the solar photovoltaic modules.

[0103] For example, in some embodiments of this application, a first insulating strip 190 with a thickness of 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm or any two of the aforementioned values ​​is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150.

[0104] In other embodiments of this application, the second region B is provided with a second insulating strip 192 with a thickness of 0.25mm to 0.35mm, and the second insulating strip 192 passes through the second wiring hole 160.

[0105] The above technical solution, by setting a second insulating strip 192 with a thickness of 0.25mm to 0.35mm in the second region B, helps to prevent problems such as increased spacing between cell strings, spacing steps, and bubbles at the edges of the solder strips in the subsequently obtained solar photovoltaic modules; thus, it helps to improve the front appearance of the photovoltaic modules; and thus helps to ensure the conversion efficiency of the solar photovoltaic modules.

[0106] For example, in some embodiments of this application, a second insulating strip 192 with a thickness of 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm or any two of the aforementioned values ​​is provided in the second region B, and the second insulating strip 192 passes through the second wiring hole 160.

[0107] In other embodiments of this application, the thickness of the first busbar 193 and the second busbar 194 is 0.12 mm to 0.18 mm.

[0108] The above technical solution, by setting the thickness of the first busbar and the second busbar to 0.12mm to 0.18mm, can meet the bypass current conduction requirements and is beneficial to the overall performance of the component.

[0109] For example, in some embodiments of this application, the thickness of the first busbar 193 and the second busbar 194 is 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm or any two of the aforementioned values.

[0110] In other embodiments of this application, the thickness of the third busbar 195 is 0.05 mm to 0.1 mm.

[0111] The above technical solution, since the third busbar 195 is welded to the back of the module cell; by setting the thickness of the third busbar 195 to 0.05mm to 0.1mm, the photovoltaic module can be avoided from being too thick, which is conducive to improving the front appearance of the photovoltaic module; thus, it is conducive to ensuring the conversion efficiency of the solar photovoltaic module.

[0112] For example, in some embodiments of this application, the thickness of the third busbar 195 is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm or any two of the aforementioned values.

[0113] In other embodiments of this application, the width of the third busbar 195 is 6mm to 8mm.

[0114] The above technical solution, by setting the thickness of the third busbar 195 to 0.05mm to 0.1mm, can improve problems such as increased spacing between cell strings, spacing steps, and bubbles at the edges of solder strips in the subsequently obtained solar photovoltaic modules; thus, it helps to improve the front appearance of the photovoltaic modules; and thus helps to ensure the conversion efficiency of the solar photovoltaic modules.

[0115] For example, in some embodiments of this application, the width of the third busbar 195 is 6 mm, 6.2 mm, 6.5 mm, 6.8 mm, 7 mm, 7.2 mm, 7.5 mm, 7.8 mm, 8 mm, or a thickness within any two of the aforementioned values.

[0116] Further optionally, and exemplary, in some embodiments of this application, the first busbar 193 and the second busbar 194 are selected to be busbars with a thickness * width of 0.18mm * 5mm.

[0117] In other embodiments of this application, the third busbar 195 is connected to the solder strip on the back of the solar photovoltaic module 100.

[0118] Since the third busbar 195 is welded to the back of the module cells, by setting the thickness of the third busbar 195 to 0.05mm to 0.1mm, the photovoltaic module can be avoided from being too thick, which is conducive to improving the front appearance of the photovoltaic module and thus helps to ensure the conversion efficiency of the solar photovoltaic module.

[0119] In some embodiments of this application, optionally, the third busbar 195 is selected as a busbar with a thickness and width of 0.1mm and 7mm.

[0120] In other embodiments of this application, an insulating material 171 is provided at the third wiring hole 170.

[0121] In the above technical solution, by providing insulating material 171 at the third wiring hole 170, it is possible to further prevent the busbar with potential difference from contacting the battery cell and causing a short circuit when the busbar is led out.

[0122] For example, in some optional embodiments of this application, the insulating material 171 described above may be insulating tape or insulating gasket, etc.

[0123] Referring to Figures 1 to 4, this application provides a method for manufacturing a solar photovoltaic module. The solar photovoltaic module 100 includes: a first battery module 110 and a second battery module 120; both the first battery module 110 and the second battery module 120 include multiple parallel-connected battery strings 130; each battery string 130 includes multiple series-connected battery strips 140; the multiple battery strips 140 in each battery string 130 are arranged sequentially without interruption, and adjacent battery strings 130 are arranged sequentially without interruption; the first battery module 110 and the second battery module 120 form a fully-covered battery cell; the second battery module 120 is connected in series with the first battery module 110;

[0124] The solar photovoltaic modules include: Region A, Region B, and Region C;

[0125] The third region C includes a portion of battery bars 140 of each battery string 130 in the first battery module 110 and a portion of battery bars 140 of each battery string 130 in the second battery module 120; the first region A includes another portion of battery bars 140 of each battery string 130 in the first battery module 110; the second region B includes another portion of battery bars 140 of each battery string 130 in the second battery module 120; the first region A is provided with a first wiring hole 150; the second region B is provided with a second wiring hole 160; and the third region C is provided with a third wiring hole 170.

[0126] The manufacturing method includes setting on the back of the solar photovoltaic module:

[0127] Insulating pads 180 are provided at the first wiring hole 150, the second wiring hole 160 and the third wiring hole 170;

[0128] A first insulating strip 190 is provided in the first area A, and the first insulating strip 190 passes through the first wiring hole 150; a second insulating strip 192 is provided in the second area B, and the second insulating strip 192 passes through the second wiring hole 160.

[0129] A first busbar 193 is provided on the first insulating strip 190; a second busbar 194 is provided on the second insulating strip 192; a third busbar 195 is provided in the third region C, and the third busbar 195 passes through the third wiring hole 170.

[0130] The first busbar 193 is welded to the third busbar 195; the second busbar 194 is welded to the third busbar 195;

[0131] Fix the first bus bar 193 and the second bus bar 194.

[0132] In the above technical solution, the solar photovoltaic module 100 uses a parallel-then-series connection method to arrange the battery strings. Furthermore, on the back of the solar photovoltaic module 100, in the first region A and the second region B, insulating strips are used to install the first busbar 193 and the second busbar 194, and in the third region C, a third busbar 195 is installed. The installation of the first busbar 193, the second busbar 194, and the third busbar 195 avoids leaving blank areas on the front of the photovoltaic module. Compared to the common half-cell modules in existing technologies, there is no need to leave blank areas for circuit leads in the middle of the upper and lower quadrants on the front of the battery; thus, the module length is not increased, which is beneficial to improving product conversion efficiency.

[0133] Furthermore, the above technical solution, by adopting a parallel-then-series connection method to set up the battery string, and setting the first busbar 193, the second busbar 194 and the third busbar 195 in the first region A, the second region B and the third region C on the back of the solar photovoltaic module 100, can fully fill the battery and improve the product conversion efficiency.

[0134] Furthermore, in some embodiments of this application, insulating pads 180 are provided in the first wiring hole 150 and the second wiring hole 160, including:

[0135] At least one layer of insulating pad 180 is provided on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 respectively.

[0136] In the above technical solution, by setting at least one layer of insulating pad 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 respectively, an insulating function can be achieved, separating the battery cell and the busbar, which helps to prevent the busbar with potential difference from touching the battery cell and causing a short circuit.

[0137] Further optionally, in some embodiments of this application, at least two layers of insulating pads 180 are provided on the underside of the first insulating strip 190 and the second insulating strip 192.

[0138] In the above technical solution, by setting at least one layer of insulating pad 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 respectively, the insulation effect can be further improved, the battery cell and the busbar can be separated, and it is further beneficial to prevent the busbar with potential difference from coming into contact with the battery cell and causing a short circuit.

[0139] Furthermore, in some embodiments of this application, an insulating pad 180 is provided in the third wiring hole 170, including:

[0140] At least one insulating pad 180 is provided between the battery strip 140 and the third busbar 195.

[0141] In the above technical solution, by setting at least one insulating pad 180 between the battery strip 140 and the third busbar 195, it is beneficial for the third busbar 195 to be welded to the solder strip on the back of the battery cell, so that the busbar can directly contact the back of the battery cell; it can effectively avoid blank areas on the front of the battery, reduce blank areas of the module, and improve product conversion efficiency.

[0142] Further optionally, in some embodiments of this application, the shape of the insulating pad 180 can be a cube, a cuboid, a cylinder, or other irregular shape. Further optionally, the size of the insulating pad 180 can be a pad with a side length or diameter of 25mm to 35mm. For example, when the shape of the insulating pad 180 is a cube, the size of the insulating pad 180 can be 30mm*30mm*30mm.

[0143] Further optionally, in some embodiments of this application, an insulating material 171 is also provided at the third wiring hole 170.

[0144] In the above technical solution, by providing insulating material 171 at the third wiring hole 170, it is possible to further prevent the busbar with potential difference from contacting the battery cell and causing a short circuit when the busbar is led out.

[0145] For example, in some optional embodiments of this application, the insulating material 171 described above may be insulating tape or insulating gasket, etc.

[0146] Furthermore, in some embodiments of this application, the manufacturing method further includes welding the third busbar 195 to the solder strip on the back of the solar photovoltaic module 100.

[0147] The above technical solution involves welding the third busbar 195 to the welding strip on the back of the solar photovoltaic module 100; this allows the busbar to directly contact the back of the cell; it effectively avoids leaving blank areas on the front of the cell, reduces blank areas in the module, and improves product conversion efficiency.

[0148] Furthermore, in some embodiments of this application, the spacing between the battery strings 130 is 1mm to 3mm.

[0149] In the above technical solution, the string spacing of the battery string 130 is set to 1mm to 3mm, which is beneficial to the manufacturing of solar photovoltaic modules and to the overall performance of photovoltaic modules, such as appearance.

[0150] For example, in some embodiments of this application, the spacing between the battery strings 130 is 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, or any two of the aforementioned values.

[0151] Further optionally, the distance from the battery string 130 to the long side of the glass can be set to 12.5mm to 14.5mm. Exemplarily, in some embodiments of this application, the distance from the battery string 130 to the long side of the glass is 12.5mm, 12.8mm, 12.9mm, 13mm, 13.2mm, 13.5mm, 13.8mm, 14mm, 14.2mm, 14.3mm, 14.5mm, or a range between any two of the aforementioned values.

[0152] Further optionally, the distance from the battery string 130 to the short side of the glass can be set to 19mm to 21mm. Exemplarily, in some embodiments of this application, the distance from the battery string 130 to the short side of the glass is 19mm, 19.2mm, 19.3mm, 19.5mm, 19.8mm, 20mm, 20.5mm, 20.8mm, 21mm, or a range between any two of the aforementioned values.

[0153] Further alternatively, in some embodiments of this application, the battery string 130 described above may be fixed with a second tape 199.

[0154] Furthermore, in some embodiments of this application, a first insulating strip 190 is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150, including:

[0155] A first insulating strip 190 with a width of 20mm to 30mm is provided in the first area A, and the first insulating strip 190 passes through the first wiring hole 150.

[0156] In the above technical solution, the use of a first insulating strip 190 with a width of 20mm to 30mm can effectively meet the required standard for the spacing between battery strings, preventing problems such as increased spacing between battery strings in the subsequently obtained solar photovoltaic modules; thus, it is beneficial to ensure the conversion efficiency of solar photovoltaic modules.

[0157] For example, in some embodiments of this application, the width of the first insulating strip 190 is 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm or any two of the aforementioned values.

[0158] Furthermore, in some embodiments of this application, a second insulating strip 192 is provided in the second region, and the second insulating strip 192 passes through the second wiring hole 160, including:

[0159] A second insulating strip 192 with a width of 20mm to 30mm is provided in the second area B, and the second insulating strip 192 passes through the second wiring hole 160.

[0160] In the above technical solution, the use of a second insulating strip 192 with a width of 20mm to 30mm can effectively meet the required standard for the spacing between battery strings, preventing problems such as increased spacing between battery strings in the subsequently obtained solar photovoltaic modules; thus, it is beneficial to ensure the conversion efficiency of solar photovoltaic modules.

[0161] For example, in some embodiments of this application, the width of the second insulating strip 192 is 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm or any two of the aforementioned values.

[0162] Furthermore, in some embodiments of this application, the width of the first busbar 193 and the second busbar 194 is 4.5mm to 5.5mm.

[0163] In the above technical solution, by setting the width of the first busbar 193 and the second busbar 194 to be 4.5mm to 5.5mm, it is beneficial to prevent problems such as increased spacing between cell strings and the appearance of spacing steps in the subsequently obtained solar photovoltaic modules; thereby, it is beneficial to improve the front appearance of the photovoltaic modules; and thus, it is beneficial to ensure the conversion efficiency of the solar photovoltaic modules.

[0164] For example, the width of the first busbar 193 and the second busbar 194 is 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm or any two of the aforementioned values.

[0165] Furthermore, in some embodiments of this application, a first insulating strip 190 is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150, including:

[0166] A first insulating strip 190 with a thickness of 0.25mm to 0.35mm is provided in the first area A, and the first insulating strip 190 passes through the first wiring hole 150.

[0167] The above technical solution, by setting a first insulating strip 190 with a thickness of 0.25mm to 0.35mm in the first region A, helps to prevent problems such as increased spacing between cell strings, spacing steps, and bubbles at the edges of solder ribbons in the subsequently obtained solar photovoltaic modules; thus, it helps to improve the front appearance of the photovoltaic modules; and thus helps to ensure the conversion efficiency of the solar photovoltaic modules.

[0168] For example, in some embodiments of this application, a first insulating strip 190 with a thickness of 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm or any two of the aforementioned values ​​is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150.

[0169] Furthermore, in some embodiments of this application, a second insulating strip 192 is provided in the second region B, and the second insulating strip 192 passes through the second wiring hole 160, including:

[0170] A second insulating strip 192 with a thickness of 0.25mm to 0.35mm is provided in the second area B, and the second insulating strip 192 passes through the second wiring hole 160.

[0171] The above technical solution, by setting a second insulating strip 192 with a thickness of 0.25mm to 0.35mm in the second region B, helps to prevent problems such as increased spacing between cell strings, spacing steps, and bubbles at the edges of the solder strips in the subsequently obtained solar photovoltaic modules; thus, it helps to improve the front appearance of the photovoltaic modules; and thus helps to ensure the conversion efficiency of the solar photovoltaic modules.

[0172] For example, in some embodiments of this application, a second insulating strip 192 with a thickness of 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm or any two of the aforementioned values ​​is provided in the second region B, and the second insulating strip 192 passes through the second wiring hole 160.

[0173] Furthermore, in some embodiments of this application, the thickness of the first busbar and the second busbar is 0.12 mm to 0.18 mm.

[0174] The above technical solution, by setting the thickness of the first busbar and the second busbar to 0.12mm to 0.18mm, can meet the bypass current conduction requirements and is beneficial to the overall performance of the component.

[0175] For example, in some embodiments of this application, the thickness of the first busbar 193 and the second busbar 194 is 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm or any two of the aforementioned values.

[0176] Furthermore, in some embodiments of this application, the thickness of the third busbar 195 is 0.05 mm to 0.1 mm.

[0177] The above technical solution, since the third busbar 195 is welded to the back of the module cell; by setting the thickness of the third busbar 195 to 0.05mm to 0.1mm, the photovoltaic module can be avoided from being too thick, which is conducive to improving the front appearance of the photovoltaic module; thus, it is conducive to ensuring the conversion efficiency of the solar photovoltaic module.

[0178] For example, in some embodiments of this application, the thickness of the third busbar 195 is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm or any two of the aforementioned values.

[0179] Furthermore, in some embodiments of this application, the width of the third busbar 195 is 6mm to 8mm.

[0180] The above technical solution, by setting the thickness of the third busbar 195 to 0.05mm to 0.1mm, can improve problems such as increased spacing between cell strings, spacing steps, and bubbles at the edges of solder strips in the subsequently obtained solar photovoltaic modules; thus, it helps to improve the front appearance of the photovoltaic modules; and thus helps to ensure the conversion efficiency of the solar photovoltaic modules.

[0181] For example, in some embodiments of this application, the width of the third busbar 195 is 6 mm, 6.2 mm, 6.5 mm, 6.8 mm, 7 mm, 7.2 mm, 7.5 mm, 7.8 mm, 8 mm, or a thickness within any two of the aforementioned values.

[0182] Further optionally, by way of example, in some embodiments of this application, the first busbar 193 and the second busbar 194 are selected as busbars with a thickness * width of 0.18mm * 5mm; optionally, the third busbar 195 is selected as a busbar with a thickness * width of 0.1mm * 7mm.

[0183] Alternatively, in some embodiments of this application, the solar photovoltaic module 100 is further provided with a fourth busbar 196. The fourth busbar 196 is disposed at the first wiring hole 150 and the second wiring hole 160 for drawing out current.

[0184] Further optionally, in some embodiments of this application, the thickness of the fourth busbar 196 is selected to be 0.15mm to 0.25mm; for example, in some embodiments of this application, the thickness of the fourth busbar 196 is selected to be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, or a thickness within any two of the aforementioned values. Further optionally, the width of the fourth busbar 196 is selected to be 7.5mm to 8.5mm; for example, in some embodiments of this application, the thickness of the fourth busbar 196 is selected to be 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm, 8mm, 8.1mm, 8.2mm, 8.3mm, 8.4mm, 8.5mm, or a width within any two of the aforementioned values.

[0185] Within the aforementioned range, the thickness of the fourth busbar 196 is selected to be 0.15mm to 0.25mm; the width is selected to be 7.5mm to 8.5mm; this is beneficial for current extraction and helps to improve problems such as heat generation caused by reverse current.

[0186] Alternatively, in some embodiments of this application, the solar photovoltaic module 100 is further provided with a fifth busbar 197. The fifth busbar 197 is welded to the end of the photovoltaic module (such as at the first battery bar, the third or fourth battery bar) for connection to the positive and negative terminals of the module.

[0187] Further optionally, in some embodiments of this application, the thickness of the fifth busbar 197 is 0.25mm to 0.35mm, and the width is selected to be 4.5mm to 5.5mm. For example, the thickness of the fifth busbar 197 is 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.30mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, or any two of the aforementioned values; the width is selected to be 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, or any two of the aforementioned values.

[0188] Furthermore, in some embodiments of this application, the first busbar 193 is welded to the third busbar 195; the second busbar 194 is welded to the third busbar 195; the fourth busbar 196 is welded to the fifth busbar 197; and the fifth busbar 197 is welded to the positive and negative electrodes.

[0189] Furthermore, in some embodiments of this application, when fixing the first busbar 193, the second busbar 194, and the third busbar 195, a first adhesive tape 198 can be used for fixing. This helps prevent the busbars with potential differences from touching the battery cells and causing a short circuit.

[0190] The features and performance of this application will be further described in detail below with reference to embodiments:

[0191] Example 1

[0192] A method for manufacturing a solar photovoltaic module is provided, comprising the following steps:

[0193] Step (1) Arrange the skewers

[0194] Referring to Figures 1-4 in the instruction manual, the solar photovoltaic module is arranged according to the preset circuit so that it includes: a first battery module and a second battery module; both the first battery module and the second battery module include multiple battery strings connected in parallel; each battery string includes multiple battery bars connected in series; the second battery module is connected in series with the first battery module.

[0195] The solar photovoltaic module includes: a first region, a second region, and a third region;

[0196] The third region includes a portion of the battery bars from each battery string in the first battery module and a portion of the battery bars from each battery string in the second battery module; the first region includes another portion of the battery bars from each battery string in the first battery module, and the second region includes another portion of the battery bars from each battery string in the second battery module; the first region is provided with a first wiring hole; the second region is provided with a second wiring hole; and the third region is provided with a third wiring hole. In this embodiment, the first region A contains 23*3=69 battery bars, the second region B contains 23*3=69 battery bars, and the third region C contains 22*3=66 battery bars.

[0197] Step (2), string entanglement

[0198] The string spacing is corrected to 2±1mm; the battery string spacing to the long side of the glass is 13.5±1mm; the battery string spacing to the short side of the glass is 20±1mm.

[0199] Step (3): Set up the fixing tape and insulating tape.

[0200] Use tape to fix the battery string. Select tape with a thickness of 25mm and a width of 10mm.

[0201] Apply insulating tape to the third wiring hole.

[0202] Step (4): Place the insulating strips and insulating pads.

[0203] The first and second insulating strips are made of PE material.

[0204] A first insulating strip is installed in a first area, and the first insulating strip passes through a first wiring hole; a second insulating strip is installed in a second area, and the second insulating strip passes through a second wiring hole.

[0205] The upper edges of the first and second insulating strips are recessed into the battery string by 2±2mm;

[0206] Insulating pads are installed at the first wiring hole, the second wiring hole, and the third wiring hole; two layers of insulating pads are placed under the first insulating strip and the second insulating strip.

[0207] The first and second insulating strips are selected to be 25mm*0.265mm in size.

[0208] The current specifications for insulating pads are 30mm*30mm*30mm cube pads.

[0209] Step (5) Busbar Placement

[0210] A first busbar is installed on the first insulating strip; a second busbar is installed on the second insulating strip; a third busbar is installed in the third region, and the third busbar passes through the third wiring hole.

[0211] The fourth busbar is placed at the first and second wiring holes to draw out the current.

[0212] The fifth busbar is welded to the end of the photovoltaic module and connected to the positive and negative ends of the module.

[0213] Specifications of the first and second busbars: thickness * width 0.18mm * 5mm;

[0214] Specifications for the third busbar: Select a busbar with a thickness of 0.1mm and a width of 7mm.

[0215] Specifications of the fourth busbar: thickness * width 0.2mm * 8mm;

[0216] Specifications of the fifth busbar: thickness * width is 0.3mm * 5mm.

[0217] Step (6) Busbar welding

[0218] The first busbar is welded to the third busbar; the second busbar is welded to the third busbar.

[0219] Weld the fourth busbar to the fifth busbar; weld the fifth busbar to the positive and negative electrodes.

[0220] Weld the third busbar to the welding strip on the back of the solar photovoltaic module; during welding, there are 7 welding points, and two consecutive points are not allowed to be poorly welded; arching is required.

[0221] Step (7) Fixing the busbar with tape

[0222] The first busbar and the second busbar are fixed in place with tape.

[0223] Choose tape with a thickness of 25mm and a width of 10mm.

[0224] Example 2

[0225] The difference from Example 1 is as follows:

[0226] The first and second insulating strips are selected with a specification of 30mm*0.25mm.

[0227] Example 3

[0228] The difference from Example 1 is as follows:

[0229] The first and second insulating strips are selected to be 20mm*0.35mm in size.

[0230] Example 4

[0231] The difference from Example 1 is as follows:

[0232] The third busbar specification selection: busbar with a thickness of 0.05mm and a width of 8mm.

[0233] Example 5

[0234] The difference from Example 1 is as follows:

[0235] The third busbar specification selection: busbar with a thickness of 0.09mm and a width of 6mm.

[0236] Example 6

[0237] The difference from Example 1 is as follows:

[0238] Specifications for the first and second busbars: thickness * width 0.17mm * 4.5mm.

[0239] Example 7

[0240] The difference from Example 1 is as follows:

[0241] Specifications for the first and second busbars: thickness * width 0.12mm * 5.5mm.

[0242] Experimental Example

[0243] The string spacing of the solar photovoltaic modules prepared in Examples 1-7 was tested, and the results are shown in the table below:

[0244] The solar photovoltaic modules prepared by the method of this application greatly improve the product conversion efficiency by eliminating the blank area on the front side.

[0245] Furthermore, as can be seen from the table above, the method of this application can effectively improve the problem of increased string spacing at the position of the insulating strip, and improve the problems of string spacing steps and air bubbles at the edge of the busbar.

[0246] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

A solar photovoltaic module, characterized in that, The solar photovoltaic module includes: a first battery module and a second battery module; both the first battery module and the second battery module include multiple battery strings connected in parallel; each battery string includes multiple battery bars connected in series; the multiple battery bars in each battery string are arranged sequentially without interruption, and adjacent battery strings are arranged sequentially without interruption; the first battery module and the second battery module form a fully covered solar cell; the second battery module is connected in series with the first battery module; The solar photovoltaic module includes: a first region, a second region, and a third region; The third region includes a portion of battery bars from each battery string in the first battery module and a portion of battery bars from each battery string in the second battery module; the first region includes another portion of battery bars from each battery string in the first battery module, and the second region includes another portion of battery bars from each battery string in the second battery module; the first region is provided with a first wiring hole; the second region is provided with a second wiring hole; and the third region is provided with a third wiring hole. On the back of the solar photovoltaic module: Insulating pads are provided at the first wiring hole, the second wiring hole and the third wiring hole; The first area is provided with a first insulating strip, and the first insulating strip passes through the first wiring hole; the second area is provided with a second insulating strip, and the second insulating strip passes through the second wiring hole; A first busbar is provided on the first insulating strip; a second busbar is provided on the second insulating strip; a third busbar is provided in the third region, and the third busbar passes through the third wiring hole; The first busbar is welded to the third busbar; the second busbar is welded to the third busbar. The solar photovoltaic module according to claim 1 is characterized in that, At least one layer of insulating pads is provided on the upper and lower sides of the first insulating strip and the second insulating strip, respectively; or At least two layers of insulating pads are provided on the lower side of the first insulating strip and the second insulating strip. The solar photovoltaic module according to claim 1 or 2 is characterized in that, At least one insulating pad is provided between the battery bar and the third bus bar. The solar photovoltaic module according to any one of claims 1-3 is characterized in that, The spacing between the battery strings is 1mm to 3mm; The first area is provided with a first insulating strip with a width of 20mm to 30mm, and the first insulating strip passes through the first wiring hole; and / or The second area is provided with a second insulating strip with a width of 20mm to 30mm, and the second insulating strip passes through the second wiring hole. The solar photovoltaic module according to any one of claims 1-4 is characterized in that, The width of the first busbar and the second busbar is 4.5mm to 5.5mm. The solar photovoltaic module according to any one of claims 1-5 is characterized in that, The first area is provided with a first insulating strip with a thickness of 0.25mm to 0.35mm, and the first insulating strip passes through the first wiring hole; and / or The second area is provided with a second insulating strip with a thickness of 0.25mm to 0.35mm, and the second insulating strip passes through the second wiring hole. The solar photovoltaic module according to any one of claims 1-6 is characterized in that, The thickness of the first busbar and the second busbar is 0.12mm to 0.18mm. The solar photovoltaic module according to any one of claims 1-7 is characterized in that, The thickness of the third busbar is 0.05 mm to 0.1 mm; and / or The width of the third busbar is 6mm to 8mm. The solar photovoltaic module according to any one of claims 1-8 is characterized in that, The third busbar is connected to the solder strip on the back of the solar photovoltaic module. The solar photovoltaic module according to any one of claims 1-9 is characterized in that, Insulating material is provided at the third wiring hole. A method for manufacturing solar photovoltaic modules, characterized in that, The solar photovoltaic module includes: a first battery module and a second battery module; both the first battery module and the second battery module include multiple battery strings connected in parallel; each battery string includes multiple battery bars connected in series; the multiple battery bars in each battery string are arranged sequentially without interruption, and adjacent battery strings are arranged sequentially without interruption; the first battery module and the second battery module form a fully covered solar cell; the second battery module is connected in series with the first battery module; The solar photovoltaic module includes: a first region, a second region, and a third region; The third region includes a portion of battery bars from each battery string in the first battery module and a portion of battery bars from each battery string in the second battery module; the first region includes another portion of battery bars from each battery string in the first battery module, and the second region includes another portion of battery bars from each battery string in the second battery module; the first region is provided with a first wiring hole; the second region is provided with a second wiring hole; and the third region is provided with a third wiring hole. The manufacturing method includes setting on the back of the solar photovoltaic module: Insulating pads are provided at the first wiring hole, the second wiring hole and the third wiring hole; A first insulating strip is provided in the first area, and the first insulating strip passes through the first wiring hole; a second insulating strip is provided in the second area, and the second insulating strip passes through the second wiring hole; A first busbar is provided on the first insulating strip; a second busbar is provided on the second insulating strip; a third busbar is provided in the third region, and the third busbar passes through the third wiring hole; The first busbar is welded to the third busbar; the second busbar is welded to the third busbar; Fix the first busbar and the second busbar. The method for manufacturing solar photovoltaic modules according to claim 11 is characterized in that, Insulating pads are provided in the first wiring hole and the second wiring hole, including: At least one layer of insulating pads is provided on the upper and lower sides of the first insulating strip and the second insulating strip, respectively; or At least two layers of insulating pads are provided on the underside of the first insulating strip and the second insulating strip. The method for manufacturing solar photovoltaic modules according to claim 11 or 12 is characterized in that, An insulating pad is provided in the third wiring hole, including: At least one insulating pad is provided between the battery bar and the third bus bar. The method for manufacturing a solar photovoltaic module according to any one of claims 11-13 is characterized in that, The spacing between the battery strings is 1mm to 3mm; A first insulating strip is provided in the first area, and the first insulating strip passes through the first wiring hole, including: A first insulating strip with a width of 20mm to 30mm is provided in the first area, and the first insulating strip passes through the first wiring hole; and / or A second insulating strip is provided in the second area, and the second insulating strip passes through the second wiring hole, including: A second insulating strip with a width of 20mm to 30mm is provided in the second area, and the second insulating strip passes through the second wiring hole. The method for manufacturing a solar photovoltaic module according to any one of claims 11-14 is characterized in that, The width of the first busbar and the second busbar is 4.5mm to 5.5mm. The method for manufacturing a solar photovoltaic module according to any one of claims 11-15 is characterized in that, A first insulating strip is provided in the first area, and the first insulating strip passes through the first wiring hole, including: A first insulating strip with a thickness of 0.25mm to 0.35mm is provided in the first area, and the first insulating strip passes through the first wiring hole; and / or A first insulating strip is provided in the second area, and the second insulating strip passes through the second wiring hole, including: A second insulating strip with a thickness of 0.25mm to 0.35mm is provided in the second area, and the second insulating strip passes through the second wiring hole. The method for manufacturing a solar photovoltaic module according to any one of claims 11-16 is characterized in that, The thickness of the first busbar and the second busbar is 0.12mm to 0.18mm. The method for manufacturing a solar photovoltaic module according to any one of claims 11-17 is characterized in that, The thickness of the third busbar is 0.05 mm to 0.1 mm; and / or The width of the third busbar is 6mm to 8mm. The method for manufacturing a solar photovoltaic module according to any one of claims 11-18 is characterized in that, Fixing the first busbar and the second busbar includes: The first busbar and the second busbar are fixed with the first adhesive tape. The method for manufacturing a solar photovoltaic module according to any one of claims 11-19 is characterized in that, The manufacturing method further includes welding the third busbar to the solder strip on the back of the solar photovoltaic module; and / or The manufacturing method further includes providing insulating material at the third wiring hole.

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