A solar photovoltaic module and a manufacturing method thereof

Abstract

The present application relates to the technical field of solar cells, and to a solar photovoltaic module and a manufacturing method thereof. The module includes: a first battery module and a second battery module; each battery string includes a plurality of battery strips connected in series; the plurality of battery strips in each battery string are arranged in sequence without interruption, and the two adjacent battery strings are arranged in sequence without interruption; the first module and the second module form a full-covered battery sheet; a first insulating strip is arranged in the first area, and the first insulating strip passes through the first wiring hole; a second insulating strip is arranged in the second area, and the second insulating strip passes through the second wiring hole; a first bus bar is arranged on the first insulating strip; a second bus bar is arranged on the second insulating strip; a third bus bar is arranged in the third area, and the third bus bar passes through the third wiring hole; the first bus bar is welded to the third bus bar; the second bus bar is welded to the third bus bar. The blank area on the front of the photovoltaic module is avoided, and the product conversion efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of solar cells, and in particular to a solar photovoltaic module and a manufacturing method thereof. Background Art

[0002] At present, component technologies in the industry are converging, and mainstream component products in the industry are mainly half-cut component design products. The circuit structure and manufacturing processes of half-cut component products are all outside the battery string, which has the advantages of simple process and low implementation difficulty.

[0003] However, half-cell modules have a lot of blank space inside, and some space on the front of the product needs to be left empty for busbar arrangement, making it impossible to implement a busbar shielding / hiding arrangement design, which greatly reduces the product conversion efficiency.

[0004] Moreover, since the half-cell component needs to leave a blank space between the upper and lower quadrants for circuit lead-out, this position design causes the component length to be lengthened, further reducing the product conversion efficiency. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a solar photovoltaic module and a method for manufacturing the same, so as to solve the problem of low conversion efficiency of existing half-cell module products.

[0006] In a first aspect, the present application provides a solar photovoltaic assembly, the solar photovoltaic assembly comprising: a first battery module and a second battery module; the first battery module and the second battery module each comprise a plurality of battery strings connected in parallel; each battery string comprises a plurality of battery bars connected in series; the plurality of battery bars in each battery string are arranged in sequence without interruption, and two adjacent battery strings are arranged in sequence without interruption; the first battery module and the second battery module form a full-coverage battery sheet; the second battery module is connected in series with the first battery module;

[0007] The solar photovoltaic module includes: a first area, a second area and a third area;

[0008] The third area includes a portion of battery bars of each battery string in the first battery module and a portion of battery bars of each battery string in the second battery module; the first area includes another portion of battery bars of each battery string in the first battery module, and the second area includes another portion of battery bars of each battery string in the second battery module; the first area is provided with a first wiring hole; the second area is provided with a second wiring hole; the third area is provided with a third wiring hole;

[0009] On the back of a solar PV module:

[0010] Insulating pads are arranged at the first wiring hole, the second wiring hole and the third wiring hole;

[0011] The first region is provided with a first insulating strip, and the first insulating strip passes through the first wiring hole; the second region is provided with a second insulating strip, and the second insulating strip passes through the second wiring hole;

[0012] A first bus bar is arranged on the first insulating strip; a second bus bar is arranged on the second insulating strip; a third bus bar is arranged in the third area, and the third bus bar passes through the third wiring hole;

[0013] The first bus bar is welded to the third bus bar; and the second bus bar is welded to the third bus bar.

[0014] The common half-cell modules in the prior art use short strings to lay out the cells, leaving blank areas in the middle of the cells. In the technical solution of the present application, each cell string of the solar photovoltaic module includes a plurality of cell bars connected in series; the plurality of cell bars in each cell string are arranged in sequence without interruption, and the two adjacent cell strings are arranged in sequence without interruption; the first module and the second module form a full-coverage of cells; blank areas can be avoided. Furthermore, the present application solution uses a parallel-first-then-series connection to set up the cell string, and the first and second bus bars of insulating strips are set in the first and second areas on the back of the solar photovoltaic module, and the third bus bar is set in the third area, avoiding the setting of the current lead-out bus bar in the blank area on the front of the photovoltaic module. Therefore, compared with the common half-cell modules in the prior art, the present application solution does not need to leave a blank area for circuit lead-out in the middle of the upper and lower quadrants on the front of the battery; thus, the length of the module will not be lengthened, which is conducive to improving the product conversion efficiency.

[0015] In other embodiments of the present application, at least one layer of insulating spacers 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 spacers are provided on the lower sides of the first insulating strip and the second insulating strip.

[0016] In other embodiments of the present application, at least one layer of insulating spacers is disposed between the battery bar and the third bus bar.

[0017] In other embodiments of the present application, the string spacing of the battery strings is 1 mm to 3 mm;

[0018] The first area is provided with a first insulating strip with a width of 20 mm to 30 mm, 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 20 mm to 30 mm, and the second insulating strip passes through the second wiring hole.

[0019] In other embodiments of the present application, the width of the first bus bar and the second bus bar is 4.5 mm to 5.5 mm.

[0020] In other embodiments of the present application, a first insulating strip having 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

[0021] The second region is provided with a second insulating strip having a thickness of 0.25 mm to 0.35 mm, and the second insulating strip passes through the second wiring hole.

[0022] In other embodiments of the present application, the thickness of the first bus bar and the second bus bar is 0.12 mm to 0.18 mm.

[0023] In other embodiments of the present application, the thickness of the third bus bar is 0.05 mm to 0.1 mm; and / or the width of the third bus bar is 6 mm to 8 mm.

[0024] In other embodiments of the present application, the third bus bar is connected to the welding strip on the back side of the solar photovoltaic module.

[0025] In other embodiments of the present application, insulating material is provided at the third wiring hole.

[0026] In a second aspect, the present application provides a method for manufacturing a solar photovoltaic module, wherein the solar photovoltaic module comprises: a first battery module and a second battery module; the first battery module and the second battery module each comprise a plurality of battery strings connected in parallel; each battery string comprises a plurality of battery strips connected in series; the plurality of battery strips in each battery string are arranged in sequence without interruption, and two adjacent battery strings are arranged in sequence without interruption; the first battery module and the second battery module form a full-covered battery sheet; the second battery module is connected in series with the first battery module;

[0027] The solar photovoltaic module includes: a first area, a second area and a third area;

[0028] The third area includes a portion of battery bars of each battery string in the first battery module and a portion of battery bars of each battery string in the second battery module; the first area includes another portion of battery bars of each battery string in the first battery module, and the second area includes another portion of battery bars of each battery string in the second battery module; the first area is provided with a first wiring hole; the second area is provided with a second wiring hole; the third area is provided with a third wiring hole;

[0029] The manufacturing method comprises: setting on the back of the solar photovoltaic module: setting insulating pads at the first wiring hole, the second wiring hole and the third wiring hole; setting a first insulating strip in the first area and passing the first insulating strip through the first wiring hole; setting a second insulating strip in the second area and passing the second insulating strip through the second wiring hole;

[0030] A first bus bar is arranged on the first insulating bar; a second bus bar is arranged on the second insulating bar; a third bus bar is arranged in the third area, and the third bus bar passes through the third wiring hole;

[0031] Welding the first bus bar to the third bus bar; welding the second bus bar to the third bus bar;

[0032] The first bus bar and the second bus bar are fixed.

[0033] In the above technical solution, the solar photovoltaic module adopts the connection method of first parallel connection and then series connection to set the battery string, and the first and second bus bars of the insulating strips are set in the first and second areas on the back of the solar photovoltaic module, and the third bus bar is set in the third area, avoiding the blank area on the front of the photovoltaic module. Compared with the common half-cell modules in the prior art, there is no need to leave a blank area for circuit lead-out in the middle of the upper and lower quadrants on the front of the battery; thus, the length of the module will not be lengthened, which is conducive to improving the product conversion efficiency.

[0034] In other embodiments of the present application, the insulating spacers are provided in the first wiring hole and the second wiring hole, including:

[0035] At least one layer of insulating spacers is provided on the upper and lower sides of the first insulating strip and the second insulating strip respectively; or

[0036] At least two layers of insulating spacers are arranged on the lower sides of the first insulating strip and the second insulating strip.

[0037] In other embodiments of the present application, an insulating spacer is provided in the third wiring hole, including:

[0038] At least one layer of insulating spacers is disposed between the battery bar and the third bus bar.

[0039] In other embodiments of the present application, the string spacing of the battery strings is 1 mm to 3 mm;

[0040] The method of disposing a first insulating strip in the first area and passing the first insulating strip through the first wiring hole comprises:

[0041] Disposing a first insulating strip with a width of 20 mm to 30 mm in the first area, and passing the first insulating strip through the first wiring hole; and / or

[0042] The method of disposing a second insulating strip in the second area and passing the second insulating strip through the second wiring hole comprises:

[0043] A second insulating strip with a width of 20 mm to 30 mm is arranged in the second area, and the second insulating strip passes through the second wiring hole.

[0044] In other embodiments of the present application, the width of the first bus bar and the second bus bar is 4.5 mm to 5.5 mm.

[0045] In other embodiments of the present application, a first insulating strip is provided in the first area, and the first insulating strip is passed through the first wiring hole, including:

[0046] Disposing a first insulating strip having a thickness of 0.25 mm to 0.35 mm in the first region, and passing the first insulating strip through the first wiring hole; and / or

[0047] The method of disposing a first insulating strip in the second area and passing the second insulating strip through the second wiring hole comprises:

[0048] A second insulating strip with a thickness of 0.25 mm to 0.35 mm is arranged in the second area, and the second insulating strip passes through the second wiring hole.

[0049] In other embodiments of the present application, the thickness of the first bus bar and the second bus bar is 0.12 mm to 0.18 mm.

[0050] In other embodiments of the present application, the thickness of the third bus bar is 0.05 mm to 0.1 mm.

[0051] In other embodiments of the present application, the width of the third bus bar is 6 mm to 8 mm.

[0052] In other embodiments of the present application, fixing the first bus bar and the second bus bar includes:

[0053] The first bus bar and the second bus bar are fixed by using a first adhesive tape.

[0054] In other embodiments of the present application, the manufacturing method further includes welding the third bus bar to the welding strip on the back side of the solar photovoltaic module.

[0055] In other embodiments of the present application, the manufacturing method further includes providing an insulating material at the third wiring hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic diagram of the structure of a solar photovoltaic assembly provided in an embodiment of the present application;

[0057] Figure 2 A schematic diagram of the structure of a solar photovoltaic assembly provided in an embodiment of the present application;

[0058] Figure 3 A schematic diagram of the structure of a solar photovoltaic assembly provided in an embodiment of the present application;

[0059] Figure 4 A schematic diagram of a partially enlarged structure of a solar photovoltaic module provided in an embodiment of the present application.

[0060] Icon: 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 spacer; 190-first insulating strip; 192-second insulating strip; 193-first bus bar; 194-second bus bar; 195-third bus bar; 196-fourth bus bar; 197-fifth bus bar; 198-first adhesive tape; 199-second adhesive tape. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0062] In the description of the embodiments of the present application, it should be understood that the terms "up", "left", "right", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0064] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] Please refer to Figure 1 to Figure 4The embodiment of the present application provides a solar photovoltaic assembly 100, which includes: a first battery module 110 and a second battery module 120; the first battery module 110 and the second battery module 120 each include a plurality of battery strings 130 connected in parallel; each battery string 130 includes a plurality of battery bars 140 connected in series; the plurality of battery bars 140 in each battery string 130 are arranged in sequence without interruption, and two adjacent battery strings 130 are arranged in sequence without interruption; the first battery module 110 and the second battery module 120 form a full-coverage battery sheet;

[0066] The second battery module 120 is connected in series with the first battery module 110;

[0067] The solar photovoltaic assembly 100 includes: a first area A, a second area B and a third area C;

[0068] The third area C includes a portion of the battery bars 140 of each battery string 130 in the first battery module 110 and a portion of the battery bars 140 of each battery string 130 in the second battery module 120; the first area A includes another portion of the battery bars 140 of each battery string 130 in the first battery module 110, and the second area B includes another portion of the battery bars 140 of each battery string 130 in the second battery module 120; the first area A is provided with a first wiring hole 150; the second area B is provided with a second wiring hole 160; and the third area C is provided with a third wiring hole 170.

[0069] On the back side of the solar photovoltaic module 100:

[0070] Insulating pads 180 are disposed at the first wiring hole 150 , the second wiring hole 160 , and the third wiring hole 170 ;

[0071] 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;

[0072] A first bus bar 193 is disposed on the first insulating strip 190 ; a second bus bar 194 is disposed on the second insulating strip 192 ; a third bus bar 195 is disposed in the third region C, and the third bus bar 195 passes through the third wiring hole 170 ;

[0073] The first bus bar 193 is welded to the third bus bar 195 ; the second bus bar 194 is welded to the third bus bar 195 ;

[0074] The first bus bar 193 and the second bus bar 194 are fixed.

[0075] The common half-cell modules in the prior art use short strings to lay out the cells, leaving blank areas in the middle of the cells. In the technical solution of the present application, each cell string 130 of the solar photovoltaic module 100 includes a plurality of cell bars 140 connected in series; the plurality of cell bars 140 in each cell string 130 are arranged in sequence without interruption, and the two adjacent cell strings 130 are arranged in sequence without interruption; the first cell module 110 and the second cell module 120 form a full-covered cell; blank areas can be avoided. Furthermore, the present application solution uses a parallel-first-then-series connection to set the cell string 130, and the first insulating bus bar 193 and the second bus bar 194 are set in the first area A and the second area B on the back of the solar photovoltaic module 100, and the third bus bar 195 is set in the third area, avoiding the bus bar for current extraction in the blank area on the front of the photovoltaic module. Therefore, compared with the common half-cell modules in the prior art, the present application solution does not need to leave a blank area for circuit extraction in the middle of the upper and lower quadrants on the front of the battery; thus, the length of the module will not be lengthened, which is conducive to improving the product conversion efficiency.

[0076] Furthermore, the above technical solution sets up the battery string by adopting a connection method of first parallel and then series, and sets the first bus bar 193, the second bus bar 194 and the third bus bar 195 in the first area A, the second area B, and the third area C on the back of the solar photovoltaic module 100, so that the battery can be fully filled and the product conversion efficiency can be improved.

[0077] In other embodiments of the present application, at least one layer of insulating spacers 180 is disposed on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 respectively; or

[0078] At least two layers of insulating spacers 180 are disposed on the lower sides of the first insulating strip 190 and the second insulating strip 192 .

[0079] In the above technical solution, by arranging at least one layer of insulating pads 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192, an insulating effect can be achieved to isolate the battery cell and the bus bar, which is helpful to prevent the bus bar with a potential difference from overlapping the battery cell and causing a short circuit.

[0080] In other embodiments of the present application, at least one layer of insulating spacers 180 is disposed between the battery bar 140 and the third bus bar 195 .

[0081] In the above technical solution, by respectively arranging at least one layer of insulating pads 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192, the insulation effect can be further improved, and the battery cells and bus bars can be isolated, which is further beneficial to prevent the bus bars with potential difference from overlapping the battery cells and causing a short circuit.

[0082] In other embodiments of the present application, the string spacing of the battery string 130 is 1 mm to 3 mm;

[0083] The first region A is provided with a first insulating strip 190 with a width of 20 mm to 30 mm, and the first insulating strip 190 passes through the first wiring hole 150; and / or

[0084] The second region B is provided with a second insulating strip 192 having a width of 20 mm to 30 mm, and the second insulating strip 192 passes through the second wiring hole 160 .

[0085] In the above technical solution, the string spacing of the battery string 130 is set to 1 mm to 3 mm, which is beneficial to the manufacture of solar photovoltaic modules and is beneficial to the overall performance of the photovoltaic modules, such as appearance.

[0086] For example, in some embodiments of the present application, the string spacing of the battery string 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 a range between any two of the foregoing values.

[0087] Further optionally, the distance from the battery string 130 to the long side of the glass can be set to 12.5 mm to 14.5 mm. For example, in some embodiments of the present application, the distance from the battery string 130 to the long side of the glass is 12.5 mm, 12.8 mm, 12.9 mm, 13 mm, 13.2 mm, 13.5 mm, 13.8 mm, 14 mm, 14.2 mm, 14.3 mm, 14.5 mm or a range between any two of the above values.

[0088] Further optionally, the distance from the battery string 130 to the short side of the glass can be set to 19 mm to 21 mm. For example, in some embodiments of the present application, the distance from the battery string 130 to the short side of the glass is 19 mm, 19.2 mm, 19.3 mm, 19.5 mm, 19.8 mm, 20 mm, 20.5 mm, 20.8 mm, 21 mm, or a range between any two of the above values.

[0089] Further optionally, in some embodiments of the present application, the battery string 130 may be fixed by a second adhesive tape 199 .

[0090] Furthermore, in some embodiments of the present application, the first region A is provided with a first insulating strip 190 with a width of 20 mm to 30 mm, and the first insulating strip 190 passes through the first wiring hole 150; this can effectively meet the requirements of the battery string spacing standard, and prevent the problem of an increase in the battery string spacing in the subsequent solar photovoltaic module; thereby facilitating the conversion efficiency of the solar photovoltaic module.

[0091] Illustratively, in some embodiments of the present application, the width of the first insulating strip 190 is 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm or a range between any two of the aforementioned values.

[0092] Furthermore, in some embodiments of the present application, a second insulating strip 192 with a width of 20 mm to 30 mm 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 an increase in the spacing between battery strings in the subsequent solar photovoltaic modules; thereby facilitating the conversion efficiency of the solar photovoltaic modules.

[0093] Illustratively, in some embodiments of the present application, the width of the second insulating strip 192 is 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm or a range between any two of the aforementioned values.

[0094] Furthermore, in some embodiments of the present application, the width of the first bus bar 193 and the second bus bar 194 is 4.5 mm to 5.5 mm.

[0095] In the above technical solution, by setting the width of the first bus bar 193 and the second bus bar 194 to 4.5 mm to 5.5 mm, it is helpful to prevent the problems of increased spacing between battery strings and the appearance of string spacing steps in the subsequent solar photovoltaic module; it is helpful to improve the front appearance of the photovoltaic module; it is helpful to ensure the conversion efficiency of the solar photovoltaic module.

[0096] Exemplarily, the width of the first bus bar 193 and the second bus bar 194 is 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm or a range between any two of the foregoing values.

[0097] In other embodiments of the present application, the first region A is provided with a first insulating strip 190 having a thickness of 0.25 mm to 0.35 mm, and the first insulating strip 190 passes through the first wiring hole 150 .

[0098] The above technical solution, by setting a first insulating strip 190 with a thickness of 0.25mm to 0.35mm in the first area A, is conducive to preventing problems such as an increase in the spacing between battery strings, the appearance of string spacing steps, and bubbles on the edges of welding strips in the subsequent solar photovoltaic modules; thereby helping to improve the front appearance of the photovoltaic modules; thereby helping to ensure the conversion efficiency of the solar photovoltaic modules.

[0099] Exemplarily, in some embodiments of the present application, a first insulating strip 190 with a thickness of 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm or a range between any two of the foregoing values ​​is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150.

[0100] In other embodiments of the present application, the second region B is provided with a second insulating strip 192 having a thickness of 0.25 mm to 0.35 mm, and the second insulating strip 192 passes through the second wiring hole 160 .

[0101] The above technical solution, by arranging a second insulating strip 192 with a thickness of 0.25mm to 0.35mm in the second area B, is helpful to prevent problems such as an increase in the spacing between battery strings, the appearance of string spacing steps, and bubbles on the edges of welding strips in the subsequent solar photovoltaic modules; thereby, it is helpful to improve the front appearance of the photovoltaic module; thereby, it is helpful to ensure the conversion efficiency of the solar photovoltaic module.

[0102] Exemplarily, in some embodiments of the present 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 a thickness in a range between any two of the foregoing values ​​is set in the second region B, and the second insulating strip 192 passes through the second wiring hole 160.

[0103] In other embodiments of the present application, the thickness of the first bus bar 193 and the second bus bar 194 is 0.12 mm to 0.18 mm.

[0104] The above technical solution, by setting the thickness of the first bus bar and the second bus bar to 0.12 mm to 0.18 mm, can meet the bypass current conduction requirements and is beneficial to the overall performance of the component.

[0105] For example, in some embodiments of the present application, the thickness of the first bus bar 193 and the second bus bar 194 is 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm or a thickness in a range between any two of the foregoing values.

[0106] In other embodiments of the present application, the thickness of the third bus bar 195 is 0.05 mm to 0.1 mm.

[0107] In the above technical solution, since the third bus bar 195 is welded on the back of the module cell, and the thickness of the third bus bar 195 is set to 0.05mm~0.1mm, it can avoid the photovoltaic module being too thick, which is beneficial to improving the front appearance of the photovoltaic module, and thus helps to ensure the conversion efficiency of the solar photovoltaic module.

[0108] For example, in some embodiments of the present application, the thickness of the third bus bar 195 is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, or a thickness in a range between any two of the aforementioned values.

[0109] In other embodiments of the present application, the width of the third bus bar 195 is 6 mm to 8 mm.

[0110] The above technical solution, by setting the thickness of the third bus bar 195 to 0.05mm-0.1mm, can improve the problems of increased cell string spacing, string spacing steps, and bubbles on the edges of welding strips in the subsequent solar photovoltaic modules; thereby, it is beneficial to improve the front appearance of the photovoltaic module; thereby, it is beneficial to ensure the conversion efficiency of the solar photovoltaic module.

[0111] Illustratively, in some embodiments of the present application, the width of the third bus bar 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 in a range between any two of the foregoing values.

[0112] Further optionally, exemplarily, in some embodiments of the present application, the first bus bar 193 and the second bus bar 194 are selected to have a thickness*width of 0.18 mm*5 mm.

[0113] In other embodiments of the present application, the third bus bar 195 is connected to the welding strip on the back side of the solar photovoltaic assembly 100 .

[0114] Since the third bus bar 195 is welded to the back of the module cell, by setting the thickness of the third bus bar 195 to 0.05mm-0.1mm, the photovoltaic module can be prevented from being too thick, which is beneficial to improving the front appearance of the photovoltaic module and thus helping to ensure the conversion efficiency of the solar photovoltaic module.

[0115] In some embodiments of the present application, optionally, the third bus bar 195 has a specification of a bus bar with a thickness*width of 0.1 mm*7 mm.

[0116] In other embodiments of the present application, an insulating material 171 is disposed at the third wiring hole 170 .

[0117] In the above technical solution, by further providing an insulating material 171 at the third wiring hole 170, it is possible to further prevent the busbar with a potential difference from overlapping the battery cell and causing a short circuit when the busbar is led out.

[0118] For example, in some optional embodiments of the present application, the insulating material 171 may be an insulating tape or an insulating gasket.

[0119] Please refer to Figure 1 to Figure 4 The embodiment of the present application provides a method for manufacturing a solar photovoltaic module, wherein the solar photovoltaic module 100 includes: a first battery module 110 and a second battery module 120; the first battery module 110 and the second battery module 120 each include a plurality of battery strings 130 connected in parallel; each battery string 130 includes a plurality of battery bars 140 connected in series; the plurality of battery bars 140 in each battery string 130 are arranged in sequence without interruption, and two adjacent battery strings 130 are arranged in sequence without interruption; the first battery module 110 and the second battery module 120 form a full-covered battery sheet; the second battery module 120 is connected in series with the first battery module 110;

[0120] The solar photovoltaic assembly includes: a first area A, a second area B and a third area C;

[0121] The third area C includes a portion of the battery bars 140 of each battery string 130 in the first battery module 110 and a portion of the battery bars 140 of each battery string 130 in the second battery module 120; the first area A includes another portion of the battery bars 140 of each battery string 130 in the first battery module 110, and the second area B includes another portion of the battery bars 140 of each battery string 130 in the second battery module 120; the first area A is provided with a first wiring hole 150; the second area B is provided with a second wiring hole 160; and the third area C is provided with a third wiring hole 170.

[0122] The manufacturing method comprises arranging on the back side of a solar photovoltaic module:

[0123] An insulating spacer 180 is provided at the first wiring hole 150 , the second wiring hole 160 and the third wiring hole 170 ;

[0124] A first insulating strip 190 is disposed in the first region A and is passed through the first wiring hole 150 ; a second insulating strip 192 is disposed in the second region B and is passed through the second wiring hole 160 ;

[0125] A first bus bar 193 is disposed on the first insulating bar 190 ; a second bus bar 194 is disposed on the second insulating bar 192 ; a third bus bar 195 is disposed in the third region C and passes through the third wiring hole 170 ;

[0126] The first bus bar 193 is welded to the third bus bar 195; the second bus bar 194 is welded to the third bus bar 195;

[0127] The first bus bar 193 and the second bus bar 194 are fixed.

[0128] In the above technical solution, the solar photovoltaic module 100 adopts a parallel connection followed by a series connection to set the battery string, and the first bus bar 193 and the second bus bar 194 are set in the first area A and the second area B on the back of the solar photovoltaic module 100 using insulating strips, and the third bus bar 195 is set in the third area C. The first bus bar 193, the second bus bar 194 and the third bus bar 195 are set, thereby avoiding the blank area on the front of the photovoltaic module. Compared with the common half-cell modules in the prior art, there is no need to leave a blank area for circuit lead-out in the middle of the upper and lower quadrants on the front of the battery; thus, the length of the module will not be lengthened, which is conducive to improving the product conversion efficiency.

[0129] Furthermore, the above technical solution sets up the battery string by adopting a connection method of first parallel and then series, and sets the first bus bar 193, the second bus bar 194 and the third bus bar 195 in the first area A, the second area B, and the third area C on the back of the solar photovoltaic module 100, so that the battery can be fully filled and the product conversion efficiency can be improved.

[0130] Furthermore, in some embodiments of the present application, an insulating spacer 180 is provided in the first wiring hole 150 and the second wiring hole 160, including:

[0131] At least one layer of insulating spacers 180 is disposed on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192 .

[0132] In the above technical solution, by arranging at least one layer of insulating pads 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192, an insulating effect can be achieved to isolate the battery cell and the bus bar, which is helpful to prevent the bus bar with a potential difference from overlapping the battery cell and causing a short circuit.

[0133] Further optionally, in some embodiments of the present application, at least two layers of insulating spacers 180 are disposed on the lower sides of the first insulating strip 190 and the second insulating strip 192 .

[0134] In the above technical solution, by respectively arranging at least one layer of insulating pads 180 on the upper and lower sides of the first insulating strip 190 and the second insulating strip 192, the insulation effect can be further improved, and the battery cells and bus bars can be isolated, which is further beneficial to prevent the bus bars with potential difference from overlapping the battery cells and causing a short circuit.

[0135] Furthermore, in some embodiments of the present application, an insulating spacer 180 is provided in the third wiring hole 170, including:

[0136] At least one layer of insulating spacers 180 is disposed between the battery bar 140 and the third bus bar 195 .

[0137] In the above technical solution, by setting at least one layer of insulating spacers 180 between the battery strip 140 and the third bus bar 195, it is beneficial to weld the third bus bar 195 to the welding strip on the back of the battery cell, so that the bus strip can directly contact the back of the battery cell; it can effectively avoid the blank area on the front side of the battery, reduce the blank area of ​​the component, and improve the product conversion efficiency.

[0138] Further optionally, in some embodiments of the present application, the shape of the insulating spacer 180 can be selected as a cube, a rectangular parallelepiped, a cylindrical shape or other irregular shapes. Further optionally, the size of the insulating spacer 180 can be selected as a spacer with a side length or diameter of 25mm to 35mm. Exemplarily, when the shape of the insulating spacer 180 is selected as a cube, the size of the insulating spacer 180 can be 30mm*30mm*30mm.

[0139] Further optionally, in some embodiments of the present application, an insulating material 171 is further provided at the third wiring hole 170 .

[0140] In the above technical solution, by further providing an insulating material 171 at the third wiring hole 170, it is possible to further prevent the busbar with a potential difference from overlapping the battery cell and causing a short circuit when the busbar is led out.

[0141] For example, in some optional embodiments of the present application, the insulating material 171 may be an insulating tape or an insulating gasket.

[0142] Furthermore, in some embodiments of the present application, the manufacturing method further includes welding the third bus bar 195 to the welding strip on the back side of the solar photovoltaic module 100 .

[0143] The above technical solution welds the third bus bar 195 to the welding strip on the back of the solar photovoltaic module 100, which can achieve direct contact between the bus strip and the back of the cell. It can effectively avoid leaving blank area on the front of the cell, reduce the blank area of ​​the module, and improve the product conversion efficiency.

[0144] Furthermore, in some embodiments of the present application, the string spacing of the battery string 130 is 1 mm to 3 mm.

[0145] In the above technical solution, the string spacing of the battery string 130 is set to 1 mm to 3 mm, which is beneficial to the manufacture of solar photovoltaic modules and is beneficial to the overall performance of the photovoltaic modules, such as appearance.

[0146] For example, in some embodiments of the present application, the string spacing of the battery string 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 a range between any two of the foregoing values.

[0147] Further optionally, the distance from the battery string 130 to the long side of the glass can be set to 12.5 mm to 14.5 mm. For example, in some embodiments of the present application, the distance from the battery string 130 to the long side of the glass is 12.5 mm, 12.8 mm, 12.9 mm, 13 mm, 13.2 mm, 13.5 mm, 13.8 mm, 14 mm, 14.2 mm, 14.3 mm, 14.5 mm or a range between any two of the above values.

[0148] Further optionally, the distance from the battery string 130 to the short side of the glass can be set to 19 mm to 21 mm. For example, in some embodiments of the present application, the distance from the battery string 130 to the short side of the glass is 19 mm, 19.2 mm, 19.3 mm, 19.5 mm, 19.8 mm, 20 mm, 20.5 mm, 20.8 mm, 21 mm, or a range between any two of the above values.

[0149] Further optionally, in some embodiments of the present application, the battery string 130 may be fixed by a second adhesive tape 199 .

[0150] Further, in some embodiments of the present application, a first insulating strip 190 is disposed in the first area A, and the first insulating strip 190 passes through the first wiring hole 150, including:

[0151] A first insulating strip 190 with a width of 20 mm to 30 mm is disposed in the first region A, and the first insulating strip 190 passes through the first wiring hole 150 .

[0152] In the above technical solution, the first insulating strip 190 with a width of 20 mm to 30 mm can effectively meet the requirements of the battery string spacing, preventing the problem of increasing the battery string spacing in the subsequent solar photovoltaic module; thereby facilitating the conversion efficiency of the solar photovoltaic module.

[0153] Illustratively, in some embodiments of the present application, the width of the first insulating strip 190 is 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm or a range between any two of the aforementioned values.

[0154] Further, in some embodiments of the present application, a second insulating strip 192 is disposed in the second region, and the second insulating strip 192 passes through the second wiring hole 160, including:

[0155] A second insulating strip 192 with a width of 20 mm to 30 mm is disposed in the second region B, and the second insulating strip 192 passes through the second wiring hole 160 .

[0156] In the above technical solution, the use of a second insulating strip 192 with a width of 20 mm to 30 mm can effectively meet the requirements of the battery string spacing standard, preventing the problem of increased battery string spacing in the subsequent solar photovoltaic modules; thereby facilitating the conversion efficiency of the solar photovoltaic modules.

[0157] Illustratively, in some embodiments of the present application, the width of the second insulating strip 192 is 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm or a range between any two of the aforementioned values.

[0158] Furthermore, in some embodiments of the present application, the width of the first bus bar 193 and the second bus bar 194 is 4.5 mm to 5.5 mm.

[0159] In the above technical solution, by setting the width of the first bus bar 193 and the second bus bar 194 to 4.5 mm to 5.5 mm, it is helpful to prevent the problems of increased spacing between battery strings and the appearance of string spacing steps in the subsequent solar photovoltaic module; it is helpful to improve the front appearance of the photovoltaic module; it is helpful to ensure the conversion efficiency of the solar photovoltaic module.

[0160] Exemplarily, the width of the first bus bar 193 and the second bus bar 194 is 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm or a range between any two of the foregoing values.

[0161] Further, in some embodiments of the present application, a first insulating strip 190 is disposed in the first area A, and the first insulating strip 190 passes through the first wiring hole 150, including:

[0162] A first insulating strip 190 having a thickness of 0.25 mm to 0.35 mm is disposed in the first region A, and the first insulating strip 190 passes through the first wiring hole 150 .

[0163] The above technical solution, by setting a first insulating strip 190 with a thickness of 0.25mm to 0.35mm in the first area A, is conducive to preventing problems such as an increase in the spacing between battery strings, the appearance of string spacing steps, and bubbles on the edges of welding strips in the subsequent solar photovoltaic modules; thereby helping to improve the front appearance of the photovoltaic modules; thereby helping to ensure the conversion efficiency of the solar photovoltaic modules.

[0164] Exemplarily, in some embodiments of the present application, a first insulating strip 190 with a thickness of 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm or a range between any two of the foregoing values ​​is provided in the first region A, and the first insulating strip 190 passes through the first wiring hole 150.

[0165] Further, in some embodiments of the present application, a second insulating strip 192 is disposed in the second region B, and the second insulating strip 192 passes through the second wiring hole 160, including:

[0166] A second insulating strip 192 with a thickness of 0.25 mm to 0.35 mm is disposed in the second region B, and the second insulating strip 192 passes through the second wiring hole 160 .

[0167] The above technical solution, by arranging a second insulating strip 192 with a thickness of 0.25mm to 0.35mm in the second area B, is helpful to prevent problems such as an increase in the spacing between battery strings, the appearance of string spacing steps, and bubbles on the edges of welding strips in the subsequent solar photovoltaic modules; thereby, it is helpful to improve the front appearance of the photovoltaic module; thereby, it is helpful to ensure the conversion efficiency of the solar photovoltaic module.

[0168] Exemplarily, in some embodiments of the present 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 a thickness in a range between any two of the foregoing values ​​is set in the second region B, and the second insulating strip 192 passes through the second wiring hole 160.

[0169] Furthermore, in some embodiments of the present application, the thickness of the first bus bar and the second bus bar is 0.12 mm to 0.18 mm.

[0170] The above technical solution, by setting the thickness of the first bus bar and the second bus bar to 0.12 mm to 0.18 mm, can meet the bypass current conduction requirements and is beneficial to the overall performance of the component.

[0171] For example, in some embodiments of the present application, the thickness of the first bus bar 193 and the second bus bar 194 is 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm or a thickness in a range between any two of the foregoing values.

[0172] Furthermore, in some embodiments of the present application, the thickness of the third bus bar 195 is 0.05 mm to 0.1 mm.

[0173] In the above technical solution, since the third bus bar 195 is welded on the back of the module cell, and the thickness of the third bus bar 195 is set to 0.05mm~0.1mm, it can avoid the photovoltaic module being too thick, which is beneficial to improving the front appearance of the photovoltaic module, and thus helps to ensure the conversion efficiency of the solar photovoltaic module.

[0174] For example, in some embodiments of the present application, the thickness of the third bus bar 195 is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, or a thickness in a range between any two of the aforementioned values.

[0175] Furthermore, in some embodiments of the present application, the width of the third bus bar 195 is 6 mm to 8 mm.

[0176] The above technical solution, by setting the thickness of the third bus bar 195 to 0.05mm-0.1mm, can improve the problems of increased cell string spacing, string spacing steps, and bubbles on the edges of welding strips in the subsequent solar photovoltaic modules; thereby, it is beneficial to improve the front appearance of the photovoltaic module; thereby, it is beneficial to ensure the conversion efficiency of the solar photovoltaic module.

[0177] Illustratively, in some embodiments of the present application, the width of the third bus bar 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 in a range between any two of the foregoing values.

[0178] Further optionally, exemplarily, in some embodiments of the present application, the specifications of the first bus bar 193 and the second bus bar 194 are selected as bus bars with a thickness*width of 0.18mm*5mm; optionally, the specifications of the third bus bar 195 are selected as bus bars with a thickness*width of 0.1mm*7mm.

[0179] Further optionally, in some embodiments of the present application, the solar photovoltaic assembly 100 is further provided with a fourth bus bar 196. The fourth bus bar 196 is provided at the first wiring hole 150 and the second wiring hole 160 for drawing out current.

[0180] Further optionally, in some embodiments of the present application, the thickness of the fourth bus bar 196 is selected to be 0.15mm to 0.25mm; exemplarily, in some embodiments of the present application, the thickness of the fourth bus bar 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 in a range between any two of the foregoing values. Further optionally, the width of the fourth bus bar 196 is selected to be 7.5mm to 8.5mm; exemplarily, in some embodiments of the present application, the thickness of the fourth bus bar 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 in a range between any two of the foregoing values.

[0181] In the above range, the thickness of the fourth bus bar 196 is selected to be 0.15 mm to 0.25 mm, and the width is selected to be 7.5 mm to 8.5 mm, which is beneficial to current extraction and to improving the heating problem caused by reverse current.

[0182] Further optionally, in some embodiments of the present application, the solar photovoltaic module 100 is further provided with a fifth bus bar 197. The fifth bus bar 197 is welded to the end of the photovoltaic module (such as the first cell bar, the third and fourth cell bars) for connecting to the positive and negative ends of the module.

[0183] Further optionally, in some embodiments of the present application, the thickness of the fifth bus bar 197 is 0.25 mm to 0.35 mm, and the width is selected to be 4.5 mm to 5.5 mm. For example, the thickness of the fifth bus bar 197 is 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 a range between any two of the foregoing values; the width is selected to be 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, or a range between any two of the foregoing values.

[0184] Furthermore, in some embodiments of the present application, the first bus bar 193 is welded to the third bus bar 195; the second bus bar 194 is welded to the third bus bar 195; the fourth bus bar 196 is welded to the fifth bus bar 197; and the fifth bus bar 197 is welded to the positive and negative electrodes.

[0185] Furthermore, in some embodiments of the present application, the first bus bar 193, the second bus bar 194, and the third bus bar 195 can be fixed by using the first adhesive tape 198. This is helpful to prevent the bus bars with potential difference from being overlapped with the battery cells to cause a short circuit.

[0186] The features and performance of the present application are further described in detail below in conjunction with the embodiments:

[0187] Example 1

[0188] A method for manufacturing a solar photovoltaic module is provided, which is prepared according to the following steps:

[0189] Step (1): Arrange the skewers

[0190] Refer to the instruction manual Figure 1-Figure 4 , according to the preset circuit, the solar photovoltaic assembly includes: a first battery module and a second battery module; the first battery module and the second battery module each include a plurality of battery strings connected in parallel; each battery string includes a plurality of battery bars connected in series; the second battery module is connected in series with the first battery module;

[0191] The solar photovoltaic module includes: a first area, a second area and a third area;

[0192] The third area includes a portion of the battery bars of each battery string in the first battery module and a portion of the battery bars of each battery string in the second battery module; the first area includes another portion of the battery bars of each battery string in the first battery module, and the second area includes another portion of the battery bars of each battery string in the second battery module; the first area is provided with a first wiring hole; the second area is provided with a second wiring hole; the third area is provided with a third wiring hole. In this embodiment, there are 23*3=69 battery bars in the first area A, 23*3=69 battery bars in the second area B, and 22*3=66 battery bars in the third area C.

[0193] Step (2): Correction

[0194] Correct the string spacing to 2±1mm; the battery string to the long side of the glass is 13.5±1mm; the battery string to the short side of the glass is 20±1mm.

[0195] Step (3): Set string fixing tape and insulating tape

[0196] Use tape to fix the battery string, and the tape specification should be 25mm*10mm in thickness*width.

[0197] An insulating tape is provided at the third wiring hole.

[0198] Step (4): Place insulation strips and insulation pads

[0199] The material of the first insulating strip and the second insulating strip is PE material.

[0200] A first insulating strip is arranged in the first area and passed through the first wiring hole; a second insulating strip is arranged in the second area and passed through the second wiring hole;

[0201] The upper edges of the first insulating strip and the second insulating strip are indented into the battery string by 2±2mm;

[0202] Insulating pads are arranged at the first wiring hole, the second wiring hole and the third wiring hole; and two layers of insulating pads are arranged under the first insulating strip and the second insulating strip.

[0203] The specifications of the first insulating strip and the second insulating strip are selected to be 25mm*0.265mm.

[0204] The specifications of the insulating spacers are now 30mm*30mm*30mm cube spacers.

[0205] Step (5): Busbar placement

[0206] A first bus bar is arranged on the first insulating bar; a second bus bar is arranged on the second insulating bar; a third bus bar is arranged in the third area, and the third bus bar passes through the third wiring hole.

[0207] The fourth bus bar is arranged at the first wiring hole and the second wiring hole to lead out the current.

[0208] The fifth bus bar is welded to the end of the photovoltaic module and connected to the positive and negative terminals of the module.

[0209] Specifications of the first bus bar and the second bus bar: thickness*width is 0.18mm*5mm;

[0210] Specifications of the third busbar: Select a busbar with a thickness and width of 0.1mm*7mm.

[0211] Specifications of the fourth busbar: thickness*width 0.2mm*8mm;

[0212] Specifications of the fifth bus bar: thickness*width is 0.3mm*5mm.

[0213] Step (6): Busbar welding

[0214] The first bus bar is welded to the third bus bar; and the second bus bar is welded to the third bus bar.

[0215] Weld the fourth bus bar to the fifth bus bar; and weld the fifth bus bar to the positive and negative electrodes.

[0216] Weld the third bus bar to the welding strip on the back of the solar photovoltaic module; when welding, there are 7 welding points, and two consecutive points of cold welding are not allowed; arching is required.

[0217] Step (7): Busbar tape fixation

[0218] The first bus bar and the second bus bar are fixed with adhesive tape.

[0219] The specifications of the tape should be a tape with a thickness and width of 25mm*10mm.

[0220] Example 2

[0221] The difference from Example 1 is:

[0222] The specifications of the first insulating strip and the second insulating strip are selected to be 30mm*0.25mm.

[0223] Example 3

[0224] The difference from Example 1 is:

[0225] The specifications of the first insulating strip and the second insulating strip are selected to be 20mm*0.35mm.

[0226] Example 4

[0227] The difference from Example 1 is:

[0228] The specification of the third busbar is: busbar with a thickness and width of 0.05mm*8mm.

[0229] Example 5

[0230] The difference from Example 1 is:

[0231] The specification of the third busbar is: busbar with a thickness and width of 0.09mm*6mm.

[0232] Example 6

[0233] The difference from Example 1 is:

[0234] The specifications of the first bus bar and the second bus bar are as follows: thickness*width is 0.17mm*4.5mm.

[0235] Example 7

[0236] The difference from Example 1 is:

[0237] The specifications of the first bus bar and the second bus bar are as follows: thickness*width is 0.12mm*5.5mm.

[0238] Experimental example

[0239] The string spacing results of the solar photovoltaic modules prepared in Examples 1-7 were tested, and the results are shown in the following table:

[0240]

[0241]

[0242] The solar photovoltaic module prepared by the method of the present application eliminates the blank area on the front side, thereby greatly improving the product conversion efficiency.

[0243] Furthermore, it can be seen from the above table that the method of the present application can effectively improve the problem of increased string spacing at the insulating strip position, and improve the string spacing step and bubble problem at the edge of the bus bar.

[0244] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar photovoltaic module, characterized in that: The solar photovoltaic assembly comprises: a first battery module and a second battery module; the first battery module and the second battery module each comprise a plurality of battery strings connected in parallel; each battery string comprises a plurality of battery strips connected in series; the plurality of battery strips in each battery string are arranged in sequence without interruption, and two adjacent battery strings are arranged in sequence without interruption; the first battery module and the second battery module form a full-covered battery sheet; the second battery module is connected in series with the first battery module; The solar photovoltaic assembly comprises: a first area, a second area and a third area; The third area includes a portion of battery bars of each battery string in the first battery module and a portion of battery bars of each battery string in the second battery module; the first area includes another portion of battery bars of each battery string in the first battery module, and the second area includes another portion of battery bars of each battery string in the second battery module; the first area is provided with a first wiring hole; the second area is provided with a second wiring hole; the third area is provided with a third wiring hole; On the back of the solar PV module: Insulating pads are arranged at the first wiring hole, the second wiring hole and the third wiring hole; The first region is provided with a first insulating strip, and the first insulating strip passes through the first wiring hole; the second region is provided with a second insulating strip, and the second insulating strip passes through the second wiring hole; A first bus bar is arranged on the first insulating strip; a second bus bar is arranged on the second insulating strip; a third bus bar is arranged in the third area, and the third bus bar passes through the 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.

2. The solar photovoltaic assembly according to claim 1, characterized in that: At least one layer of insulating spacers is disposed on the upper and lower sides of the first insulating strip and the second insulating strip respectively; or At least two layers of insulating spacers are arranged on the lower sides of the first insulating strip and the second insulating strip.

3. The solar photovoltaic assembly according to claim 1, characterized in that: At least one layer of the insulating spacer is arranged between the battery bar and the third bus bar.

4. The solar photovoltaic assembly according to claim 1, characterized in that: The string spacing of the battery strings is 1 mm to 3 mm; The first region is provided with a first insulating strip with a width of 20 mm to 30 mm, 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 20 mm to 30 mm, and the second insulating strip passes through the second wiring hole.

5. The solar photovoltaic assembly according to claim 1, characterized in that: The width of the first bus bar and the second bus bar is 4.5 mm to 5.5 mm.

6. The solar photovoltaic assembly according to claim 1, characterized in that: The first region is provided with a first insulating strip with a thickness of 0.25 mm to 0.35 mm, and the first insulating strip passes through the first wiring hole; and / or The second area is provided with a second insulating strip having a thickness of 0.25 mm to 0.35 mm, and the second insulating strip passes through the second wiring hole.

7. The solar photovoltaic assembly according to any one of claims 1 to 6, characterized in that: The thickness of the first bus bar and the second bus bar is 0.12 mm to 0.18 mm.

8. The solar photovoltaic assembly according to any one of claims 1 to 6, characterized in that: The thickness of the third bus bar is 0.05 mm to 0.1 mm; and / or The width of the third bus bar is 6 mm to 8 mm.

9. The solar photovoltaic assembly according to any one of claims 1 to 6, characterized in that: The third bus bar is connected to the welding strip on the back side of the solar photovoltaic module.

10. The solar photovoltaic assembly according to any one of claims 1 to 6, characterized in that: Insulating material is arranged at the third wiring hole.

11. A method for manufacturing a solar photovoltaic module, characterized in that: The solar photovoltaic assembly comprises: a first battery module and a second battery module; the first battery module and the second battery module each comprise a plurality of battery strings connected in parallel; each battery string comprises a plurality of battery strips connected in series; the plurality of battery strips in each battery string are arranged in sequence without interruption, and two adjacent battery strings are arranged in sequence without interruption; the first battery module and the second battery module form a full-covered battery sheet; the second battery module is connected in series with the first battery module; The solar photovoltaic assembly comprises: a first area, a second area and a third area; The third area includes a portion of battery bars of each battery string in the first battery module and a portion of battery bars of each battery string in the second battery module; the first area includes another portion of battery bars of each battery string in the first battery module, and the second area includes another portion of battery bars of each battery string in the second battery module; the first area is provided with a first wiring hole; the second area is provided with a second wiring hole; the third area is provided with a third wiring hole; The manufacturing method comprises providing on the back side of the solar photovoltaic module: Insulating pads are arranged at the first wiring hole, the second wiring hole and the third wiring hole; A first insulating strip is arranged in the first area and passed through the first wiring hole; a second insulating strip is arranged in the second area and passed through the second wiring hole; Arranging a first bus bar on the first insulating bar; arranging a second bus bar on the second insulating bar; arranging a third bus bar in the third area, and passing the third bus bar through the third wiring hole; Welding the first bus bar to the third bus bar; welding the second bus bar to the third bus bar; The first bus bar and the second bus bar are fixed.

12. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: Insulating pads are arranged in the first wiring hole and the second wiring hole, including: At least one layer of the insulating spacer is disposed on the upper and lower sides of the first insulating strip and the second insulating strip respectively; or At least two layers of the insulating spacers are arranged on the lower sides of the first insulating strip and the second insulating strip.

13. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: An insulating spacer is arranged in the third wiring hole, comprising: At least one layer of the insulating spacer is disposed between the battery bar and the third bus bar.

14. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: The string spacing of the battery strings is 1 mm to 3 mm; The method of disposing a first insulating strip in the first area and passing the first insulating strip through the first wiring hole comprises: Disposing a first insulating strip with a width of 20 mm to 30 mm in the first area, and passing the first insulating strip through the first wiring hole; and / or The method of disposing a second insulating strip in the second area and passing the second insulating strip through the second wiring hole comprises: A second insulating strip with a width of 20 mm to 30 mm is arranged in the second area, and the second insulating strip passes through the second wiring hole.

15. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: The width of the first bus bar and the second bus bar is 4.5 mm to 5.5 mm.

16. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: The method of disposing a first insulating strip in the first area and passing the first insulating strip through the first wiring hole comprises: Disposing a first insulating strip with a thickness of 0.25 mm to 0.35 mm in the first area, and passing the first insulating strip through the first wiring hole; and / or The method of disposing a second insulating strip in the second area and passing the second insulating strip through the second wiring hole comprises: A second insulating strip with a thickness of 0.25 mm to 0.35 mm is disposed in the second area, and the second insulating strip passes through the second wiring hole.

17. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: The thickness of the first bus bar and the second bus bar is 0.12 mm to 0.18 mm.

18. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: The thickness of the third bus bar is 0.05 mm to 0.1 mm; and / or The width of the third bus bar is 6 mm to 8 mm.

19. The method for manufacturing a solar photovoltaic module according to claim 11, characterized in that: Fixing the first bus bar and the second bus bar comprises: The first bus bar and the second bus bar are fixed by using a first adhesive tape.

20. The method for manufacturing a solar photovoltaic module according to any one of claims 11 to 19, characterized in that: The manufacturing method further comprises welding the third bus bar to the welding strip on the back side of the solar photovoltaic module; and / or The manufacturing method further includes providing an insulating material at the third wiring hole.

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