A photovoltaic module with high light transmission

Abstract

The application discloses a high-transmittance photovoltaic module, comprising a back plate, a butt joint surface and a mounting surface, the butt joint surface is provided with a first notch, and the bottom of the first notch is provided with positioning grooves arranged side by side; a first adhesive film layer is provided with strip-shaped through holes arranged side by side and an even number of positioning notches, and the positioning notches of adjacent rows are staggered; a photovoltaic power generation layer comprises cell pieces which are adapted to the positioning notches and are connected in series one by one; a second adhesive film layer is arranged on the first adhesive film layer; and a cover plate is sealingly attached to the butt joint surface. The high-transmittance photovoltaic module is provided with the first notch on the back plate, so that the first adhesive film layer is conveniently positioned, the cell pieces are conveniently positioned through the positioning notches, the adjacent cell pieces are connected in series through the conductive strips in the positioning space, the assembly is facilitated, the cell pieces are prevented from deviating, the thickness of the whole module is reduced, the light transmittance is improved, and the light transmittance is ensured through the staggered positioning notches.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic module with high light transmittance. Background Technology

[0002] A photovoltaic module is a power generation device that generates direct current when exposed to sunlight. It consists of thin, solid photovoltaic cells made almost entirely of semiconductor materials, such as silicon.

[0003] Photovoltaic modules can be interconnected to generate more electricity. As a result, photovoltaic modules are used on rooftops and building surfaces, and are even used as part of windows, skylights, or shading devices. These photovoltaic installations are often referred to as building-attached photovoltaic systems.

[0004] To facilitate natural lighting within buildings and ensure a sufficient amount of sunlight enters, photovoltaic (PV) modules typically maintain gaps between adjacent cells to allow light to pass through and illuminate the area beneath the module. However, excessively large gaps, while increasing light transmittance, result in visible weld lines that can cast shadows beneath the building, affecting the aesthetics of the ground and the module itself, and reducing power generation. Conversely, insufficient gaps reduce the amount of sunlight passing through the module, impacting the amount of light reaching the area beneath it. Furthermore, existing PV modules primarily consist of a cover plate, a first encapsulating film layer, a cell layer, a second encapsulating film layer, and a backsheet. The cell layer comprises multiple cells, requiring sequential placement of each cell on the second encapsulating film layer during production, which is cumbersome. The gaps between the cells also cause positional shifts during installation and lamination, affecting stable electrical connections. Additionally, the sequential stacking of the first, cell, and second encapsulating film layers results in a thicker PV module, reducing light transmittance.

[0005] Therefore, it is necessary to improve existing photovoltaic modules. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects in the prior art and provide a high-transmittance photovoltaic module that increases light transmittance, ensures aesthetics, facilitates production and assembly, and ensures stable connection between solar cells.

[0007] To achieve the above-mentioned technical effects, the technical solution of the present invention is: a photovoltaic module with high light transmittance, comprising:

[0008] The back panel has a mating surface and a mounting surface that are arranged opposite to each other along its thickness direction. The mounting surface is used for installation on the top of a building. A first notch is provided on the mating surface, and a plurality of positioning grooves are arranged side by side at the bottom of the first notch.

[0009] The first adhesive film layer has its outer circumferential edge adhering to the inner circumferential wall of the first recess. The first adhesive film layer has parallel strip-shaped through holes that correspond one-to-one with the positioning grooves. The strip-shaped through holes and the positioning grooves combine to form a positioning space. The side of the first adhesive film layer away from the mounting surface is the positioning surface. The positioning surface has an even number of rows of positioning recesses. The positioning recesses in adjacent rows are staggered. The positioning recesses are connected between two adjacent strip-shaped through holes.

[0010] A photovoltaic power generation layer, comprising solar cells laid on the first adhesive film layer, the solar cells being adapted to the positioning notch, and the side of the photovoltaic power generation layer adjacent to the mounting surface being connected in series by conductive strips, the conductive strips being disposed within the positioning space;

[0011] A second adhesive film layer is stacked on the side of the first adhesive film layer away from the mounting surface;

[0012] A cover plate having a connecting surface and a light-receiving surface disposed opposite to each other along its thickness direction, the light-receiving surface being used to receive sunlight, and the connecting surface being sealed and fitted to the mating surface.

[0013] Preferably, in order to further reduce the thickness of the photovoltaic module and increase the light transmittance, while avoiding the first notch being too deep and affecting the structural strength of the back sheet, a second notch is provided on the connecting surface, the second adhesive film layer is adapted to the second notch, and the second notch and the first notch have overlapping projections on the mounting surface.

[0014] Preferably, in order to facilitate the alignment of the first adhesive film layer with the first notch during the production process, and to ensure that there is sufficient corneal material during lamination so that the corneal material can fill the gap between the cover plate and the back plate after melting, the strip-shaped through hole and the positioning groove have overlapping projections on the mounting surface.

[0015] Preferably, to facilitate assembly, the conductive strip and the battery cell are connected in series to form a circuit during assembly, while preventing the conductive strip from sliding in the positioning groove. The conductive strip is connected to an insulating strip, and the conductive strip and the insulating strip have the same length direction. The conductive strip and the insulating strip are combined to form a connecting strip, which is adapted to the positioning space.

[0016] Preferably, in order to ensure that the cover plate and the back plate are aligned during lamination and to prevent relative misalignment, the back plate is provided with a first positioning through hole, which is located outside the first recess and has its two ends located on the mating surface and the mounting surface, respectively. The cover plate is provided with a second positioning through hole, which is located outside the second recess and has its two ends located on the connecting surface and the light-transmitting surface, respectively. The first positioning through hole and the second positioning through hole correspond one-to-one and are engaged by a positioning shaft.

[0017] Preferably, in order to enhance the connection strength between the back plate and the cover plate, a first reinforcing groove is provided on the mating surface surrounding the first recess, and a second reinforcing groove is provided on the connecting surface surrounding the second recess. The first reinforcing groove and the second reinforcing groove are arranged opposite to each other and are interconnected. A reinforcing strip is provided between the back plate and the cover plate, and the reinforcing strip is sandwiched between the first reinforcing groove and the second reinforcing groove.

[0018] Preferably, in order to enable the reinforcing strip and the adhesive film in the first adhesive film layer and the second adhesive film layer to come into contact and merge after melting during lamination, thereby further strengthening the connection strength between the back plate and the cover plate, a first connecting groove is provided between the first reinforcing groove and the first recess, and a second connecting groove is provided between the second reinforcing groove and the second recess.

[0019] Preferably, in order to ensure that the excess adhesive after the reinforcing strip melts during lamination is smoothly discharged outside the component, the first reinforcing groove passes through the first positioning through hole, the second reinforcing groove passes through the second positioning through hole, the positioning shaft is a positioning cylinder, and the side wall of the positioning cylinder is provided with a communication port that communicates with the first reinforcing groove and / or the second reinforcing groove.

[0020] Preferably, in order to facilitate a firm connection between the positioning cylinder and the back plate during lamination, a protrusion is provided on the circumferential side wall of the positioning cylinder, and the protrusion abuts against the mounting surface.

[0021] Preferably, in order to facilitate the extension of the photovoltaic power generation circuit of the module to the back sheet and cover plate, and to facilitate connection with power supply facilities, two electrode through holes are provided on the mounting surface. The two electrode through holes extend to communicate with the positioning groove at one end. The two electrode through holes are respectively sealed and connected to two electrode posts. The two electrode posts, together with the battery cell and the conductive strip, form a series circuit. The two electrode posts protrude from the mounting surface.

[0022] In summary, compared with the prior art, the high-transmittance photovoltaic module of the present invention facilitates the positioning of the first encapsulant layer by setting a first notch on the back panel, and further facilitates the positioning of the solar cells by using the positioning notch. The conductive strip in the positioning space connects adjacent solar cells in series, which facilitates assembly and avoids solar cell misalignment. At the same time, it reduces the overall thickness of the module and improves the transmittance. Furthermore, the staggered positioning notch ensures the staggered distribution between solar cells, thereby ensuring the amount of light transmitted. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 yes Figure 1 An explosion diagram;

[0025] Figure 3 yes Figure 1 An illustration of the explosion from another perspective;

[0026] Figure 4 yes Figure 1 Partial structural diagram;

[0027] Figure 5 yes Figure 4 Top view;

[0028] Figure 6 This is a schematic diagram of the connection structure between the photovoltaic power generation layer and the first adhesive film layer of the present invention;

[0029] Figure 7 yes Figure 6 An explosion diagram;

[0030] Figure 8 This is a schematic diagram of the structure of the first adhesive film layer of the present invention;

[0031] Figure 9 yes Figure 8 Top view;

[0032] Figure 10 yes Figure 8 Enlarged view of part A;

[0033] Figure 11 This is a schematic diagram of the structure of the back plate of the present invention;

[0034] Figure 12 yes Figure 11 Top view;

[0035] Figure 13 yes Figure 12 Enlarged view of part B;

[0036] Figure 14 This is a schematic diagram of the cover plate of the present invention;

[0037] Figure 15 yes Figure 14 Enlarged view of part C;

[0038] Figure 16 This is a schematic diagram of the positioning shaft of the present invention;

[0039] In the diagram: 100, back plate; 101, mating surface; 102, mounting surface; 103, first notch; 104, positioning groove; 105, first positioning through hole; 106, first reinforcing groove; 107, first connecting groove; 108, electrode through hole; 200, first adhesive film layer; 201, positioning surface; 202, strip-shaped through hole; 203, positioning notch; 300, battery cell; 400, second adhesive film layer; 500, cover plate; 501, connecting surface; 502, light-transmitting surface; 503, second notch; 504, second positioning through hole; 505, second reinforcing groove; 506, second connecting groove; 600, conductive strip; 700, insulating strip; 800, positioning shaft; 801, connecting port; 802, protrusion; 900, reinforcing adhesive strip; 110, electrode post. Detailed Implementation

[0040] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0041] like Figures 1-16 As shown, the high light transmittance photovoltaic module of the present invention includes:

[0042] The back plate 100 has a mating surface 101 and a mounting surface 102 arranged opposite to each other along its thickness direction. The mounting surface 102 is used for mounting on the top of a building. A first recess 103 is provided on the mating surface 101. A plurality of positioning grooves 104 are arranged side by side at the bottom of the first recess 103.

[0043] The first adhesive film layer 200 has its outer circumferential edge attached to the inner circumferential wall of the first recess 103. The first adhesive film layer 200 is provided with strip-shaped through holes 202 arranged side by side and corresponding one-to-one with the positioning grooves 104. The strip-shaped through holes 202 and the positioning grooves 104 are combined to form a positioning space. The side of the first adhesive film layer 200 away from the mounting surface 102 is the positioning surface 201. The positioning surface 201 is provided with an even number of rows of positioning recesses 203. The positioning recesses 203 in adjacent rows are staggered. The positioning recesses 203 are connected between two adjacent strip-shaped through holes 202.

[0044] The photovoltaic power generation layer includes solar cells 300 laid on the first adhesive film layer 200. The solar cells 300 are adapted to the positioning notch 203. The side of the photovoltaic power generation layer adjacent to the mounting surface 102 is connected in series by conductive strips 600. The conductive strips 600 are set in the positioning space.

[0045] The second adhesive film layer 400 is stacked on the side of the first adhesive film layer 200 away from the mounting surface 102;

[0046] The cover plate 500 has a connecting surface 501 and a light-receiving surface 502 arranged opposite to each other along its thickness direction. The light-receiving surface 502 is used to receive sunlight, and the connecting surface 501 is sealed and fitted with the mating surface 101.

[0047] Specifically, in this invention, the back plate 100 and the cover plate 500 are both rectangular glass plates with a thickness of 2mm. The first recess 103 is rectangular with a thickness of 0.4mm. The positioning groove 104 has a depth of 0.2mm. The first adhesive layer 200 and the second adhesive layer 400 are both EVA adhesive films with the same thickness of 0.4mm. Both are rectangular. The length of the first adhesive layer 200 is the same as the length of the second adhesive layer 400, and the width of the first adhesive layer 200 is the same as the width of the second adhesive layer 400. The positioning recess 203 on the first adhesive layer 200 has a depth of 0.2mm. The thickness of the battery cell 300 is 0.2mm, and the thickness of the conductive strip 600 is 0.6mm. It should be noted that the specific dimensions of the back plate 100, the cover plate 500, the positioning groove 104, the first adhesive layer 200, the second adhesive layer 400, the battery cell 300, and the conductive strip 600 are not limited to the above data in actual production.

[0048] The battery assembly is manufactured according to the following steps:

[0049] S10. Place the back plate 100 horizontally with its mounting surface 102 facing down and the first recess 103 facing up.

[0050] S20. Place the first adhesive film layer 200 into the first recess 103, so that the outer edge of the first adhesive film layer 200 is in contact with the inner wall of the first recess 103. At the same time, the positioning surface 201 of the first adhesive film layer 200 is flush with the mating surface 101 of the back plate 100. The strip-shaped through holes 202 are correspondingly set above the positioning groove 104, and the length direction of the strip-shaped through holes 202 is consistent with that of the positioning groove 104.

[0051] S30. A conductive strip 600 is inserted into the positioning groove 104 through the strip-shaped through hole 202 of the first adhesive film layer 200, so that the side of the conductive strip 600 facing away from the bottom of the positioning groove 104 is flush with the bottom of the positioning recess 203. Then, a battery cell 300 is placed in each positioning recess 203 with the light-receiving surface 502 of the battery cell 300 facing upward, so that each battery cell 300 is connected in series through the conductive strip 600.

[0052] S40. Lay a second adhesive film layer 400 on the first adhesive film layer 200, and keep the second adhesive film layer 400 aligned with the first adhesive film layer 200.

[0053] S50, A cover plate 500 is laid on the second adhesive film layer 400, and the connecting surface 501 of the cover plate 500 is sealed and fitted with the mating surface 101 of the back plate 100.

[0054] S60. The backsheet 100, the first encapsulant layer 200, the solar cell 300, the second encapsulant layer 400, and the cover plate 500 are laminated to form a photovoltaic module.

[0055] In the aforementioned photovoltaic module, because a first recess 103 is provided on the backsheet 100 for placing a first encapsulating film layer 200 that is compatible with the first recess 103, the overall thickness of the photovoltaic module can be effectively reduced, and the light transmittance can be improved. This allows the photovoltaic module to increase light transmission when installed on the roof of a sunroom, promoting the growth of plants inside the sunroom. Furthermore, the first recess 103 can also position the first encapsulating film layer 200. The positioning recess 203 on the first encapsulating film layer 200 not only positions the placement of the solar cells 300, ensuring close contact between the solar cells 300 after installation, but also ensures that the first encapsulating film layer 200 and the second encapsulating film layer 400 are in close contact before lamination. This reduces gaps and allows the first and second encapsulating film layers 200 and 400 to fully contact and connect in their molten state during lamination. The first adhesive film layer 200 is connected to the backsheet 100, and the second adhesive film layer 400 is connected to the cover plate 500, further strengthening the connection between the backsheet 100 and the cover plate 500. Furthermore, the first adhesive film layer 200 and the second adhesive film layer 400 are arranged adjacent to each other, further reducing the thickness of the photovoltaic module. Based on the thickness dimensions of the backsheet 100, the first adhesive film layer 200, the solar cell 300, the second adhesive film layer 400, and the cover plate 500 in the prior art, the overall thickness of the photovoltaic module is 4.5 mm. However, with the technical solution of this invention, the overall thickness of the photovoltaic module is 4 mm. Therefore, the above technology effectively reduces the overall thickness of the photovoltaic module, thereby increasing the light transmittance. Moreover, the positioning notch 203 facilitates the laying of the solar cell 300 and avoids misalignment between the solar cells 300 during lamination, thus ensuring a stable series connection of the solar cells 300.

[0056] In a preferred embodiment, a second recess 503 is provided on the connecting surface 501, and the second adhesive film layer 400 is adapted to the second recess 503. The second recess 503 and the first recess 103 have overlapping projections on the mounting surface 102.

[0057] In this invention, the photovoltaic power generation layer has four rows of solar cells 300, with five solar cells 300 in each row. The solar cells 300 in adjacent rows are staggered to achieve the desired effect. Figure 5 Taking the example shown, from top to bottom, the first row of solar cells 300 and the second row of solar cells 300 are connected in series through the conductive strips 600 on the back to form a first circuit. The third row of solar cells 300 and the fourth row of solar cells 300 are connected in series through other conductive strips 600 on the back (located in the same positioning groove 104 as the above-mentioned conductive strips 600 and spaced apart) to form a second circuit. The first circuit and the second circuit are connected in series, so that all the solar cells 300 are connected in series through the conductive strips 600 in the positioning groove 104 to form a photovoltaic power generation circuit. It should be noted that in this invention, the solar cells 300 can also be in other rows, and the number of rows is even. The rows containing adjacent solar cells 300 are arranged adjacent to each other, and the number of solar cells 300 in each row is equal. Furthermore, the solar cells 300 in adjacent rows are staggered. After the solar cells 300 are laid out in the above manner, gaps are formed between adjacent solar cells 300, which facilitates the passage of sunlight through the gaps between adjacent solar cells 300, ensuring the light transmittance of the photovoltaic module. The adjacent rows are arranged adjacent to each other, which can shorten the spacing between rows, allowing the module to accommodate more solar cells 300 and ensuring photovoltaic power generation. At the same time, the sides of the solar cells 300 overlap the conductive strip 600, which is beneficial to the overall aesthetics of the photovoltaic module.

[0058] Specifically, such as Figure 3 , Figure 14 and Figure 15 As shown, the second notch 503 provided on the connecting surface 501 has a thickness of 0.2 mm, and its length, width and thickness are the same as the length, width and thickness of the second adhesive layer 400, respectively. This makes the second adhesive layer 400 fit with the second notch 503, and the second notch 503 can accommodate the second adhesive layer 400. This is beneficial for the connecting surface 501 of the cover plate 500 to be sealed and fitted with the mating surface 101 of the back plate 100 when performing step S50, and avoids the first notch 103 being too thick, which would affect the structural strength of the back plate 100.

[0059] In a preferred embodiment, the strip-shaped through hole 202 and the positioning groove 104 have overlapping projections on the mounting surface 102, specifically, as shown below. Figures 4-6As shown, the length, width, and direction of the strip-shaped through-hole 202 are consistent with the length, width, and direction of the positioning groove 104, respectively. This structure ensures that after the conductive strip 600 is inserted into the positioning space formed by the strip-shaped through-hole 202 and the positioning groove 104, the conductive strip 600 adheres to the inner walls on both sides of the strip-shaped through-hole 202, reducing the offset of the conductive strip 600 during lamination. It also helps ensure that after the battery cell 300 is placed in the positioning recess 203, both sides of the battery cell 300 contact the conductive strip 600 inside the strip-shaped through-hole 202 on both sides of the positioning recess 203, allowing the staggered battery cells 300 to be connected in series sequentially.

[0060] In a preferred embodiment, an insulating strip 700 is connected to a conductive strip 600. The conductive strip 600 and the insulating strip 700 have the same length direction, and the conductive strip 600 and the insulating strip 700 are combined to form a connecting strip, which is adapted to the positioning space. Specifically, as shown... Figures 5-8 As shown, in this invention, the conductive strip 600 and the insulating strip 700 have the same length and cross-section, so that the conductive strip 600 and the insulating strip 700 combine to form a connecting strip. The connecting strip is adapted to the positioning space, so that after the connecting strip is installed in the positioning space, the conductive strip 600 is prevented from sliding along the length direction of the positioning groove 104, and the position of the conductive strip 600 is further fixed. So that after the battery cell 300 is installed in the positioning recess 203, the battery cells 300 form a stable series connection through the conductive strip 600. The conductive strip 600 is preferably conductive adhesive, and the insulating strip 700 is preferably insulating plastic. More specifically, as... Figure 7 As shown, in this invention, since the battery cells 300 in adjacent rows are staggered and there are five battery cells 300 in each row, there are eleven connecting strips arranged side by side. For the connecting strip at the left end, two conductive strips 600 and two insulating strips 700 are fixedly connected. The conductive strips 600 and insulating strips 700 are distributed at intervals. The two conductive strips 600 are distributed and connected to the battery cells 300 at the end of the first row and the end of the third row. For the connecting strip at the right end, it is formed by a conductive strip 600 and an insulating strip 700 fixedly connected. The conductive strip 600 is used to electrically connect the battery cells 300 at the end of the second and fourth rows. For the other connecting strips, they are all formed by an insulating strip 700 and conductive strips 600 fixed at both ends of the insulating strip 700. The conductive strips 600 at both ends of the insulating strip 700 are distributed to connect the battery cells 300 between the first and second rows and between the third and fourth rows. The battery cells 300 are connected in series using the above distribution method.

[0061] In a preferred embodiment, the back plate 100 is provided with a first positioning through hole 105, which is located on the outside of the first recess 103, with its two ends located on the mating surface 101 and the mounting surface 102, respectively. The cover plate 500 is provided with a second positioning through hole 504, which is located on the outside of the second recess 503, with its two ends located on the connecting surface 501 and the light-transmitting surface 502, respectively. The first positioning through hole 105 and the second positioning through hole 504 correspond one-to-one and are engaged by a positioning shaft 800. Specifically, as shown... Figures 11-16 As shown, each of the four corners of the back plate 100 is provided with a first positioning through hole 105, and each of the four corners of the cover plate 500 is provided with a second positioning through hole 504. The first positioning through hole 105 and the second positioning through hole 504 have the same cross-section, which is square. When the mating surface 101 and the connecting surface 501 are sealed and fitted together, the first positioning through hole 105 and the second positioning through hole 504 are combined to form a cylindrical through hole with a square cross-section. The inner side of the cylindrical through hole is sealed and connected with a positioning shaft 800, that is, the outer circumferential edge of the positioning shaft 800 is sealed and fitted with the inner circumferential wall of the first positioning through hole 105 and the inner circumferential wall of the second positioning through hole 504, so as to realize the insertion and engagement of the first positioning through hole 105 with the second positioning through hole 504 through the positioning shaft 800. In this way, the cover plate 500 and the back plate 100 are aligned, and the cover plate 500 and the back plate 100 are prevented from deviating during lamination.

[0062] In a preferred embodiment, a first reinforcing groove 106 surrounding the first recess 103 is provided on the mating surface 101, and a second reinforcing groove 505 surrounding the second recess 503 is provided on the connecting surface 501. The first reinforcing groove 106 and the second reinforcing groove 505 are directly opposite each other and communicate with each other. A reinforcing strip 900 is provided between the back plate 100 and the cover plate 500, and the reinforcing strip 900 is sandwiched between the first reinforcing groove 106 and the second reinforcing groove 505. A first connecting groove 107 is provided between the first reinforcing groove 106 and the first recess 103, and a second connecting groove 506 is provided between the second reinforcing groove 505 and the second recess 503. Specifically, as shown... Figures 11-16As shown, the projections of the first reinforcing groove 106 and the second reinforcing groove 505 on the mounting surface 102 are both rectangular frames and coincide. The first notch 103 is located inside the first reinforcing groove 106, and the second notch 503 is located inside the second reinforcing groove 505. The first notch 103 is connected to the first reinforcing groove 106 through the first connecting groove 107, which is spaced apart circumferentially along the first reinforcing groove 106. The second notch 503 is connected to the second reinforcing groove 505 through the second connecting groove 506. 6. The reinforcing strip 900 is arranged circumferentially along the second reinforcing groove 505; the reinforcing strip 900 is an EVA strip, which is made of the same material as the first adhesive film layer 200 and the second adhesive film layer 400. After adopting the above structure, during lamination, the EVA adhesive of the first adhesive film layer 200, the second adhesive film layer 400 and the reinforcing strip 900 melts and fuses together through the first connecting groove 107 and the second connecting groove 506, which increases the contact area between the EVA adhesive and the back plate 100 and the cover plate 500, thereby strengthening the connection strength between the back plate 100 and the cover plate 500.

[0063] In a preferred embodiment, the first reinforcing groove 106 passes through the first positioning through hole 105, and the second reinforcing groove 505 passes through the second positioning through hole 504. The positioning shaft 800 is a positioning cylinder, and the side wall of the positioning cylinder is provided with a communication port 801 communicating with the first reinforcing groove 106 and / or the second reinforcing groove 505. A protrusion 802 is provided on the circumferential side wall of the positioning cylinder, and the protrusion 802 abuts against the mounting surface 102. Specifically, as shown... Figures 11-16 As shown, two adjacent side walls of the positioning cylinder have connecting openings 801, which connect to the first reinforcing groove 106 and the second reinforcing groove 505. When the mating surface 101 and the connecting surface 501 are sealed and fitted together, the first reinforcing groove 106 and the second reinforcing groove 505 combine to form a reinforcing channel. The reinforcing strip 900 is sandwiched between the inner walls of the reinforcing channel. During the lamination process, excess adhesive of the reinforcing strip 900 can escape from the positioning cylinder through the connecting openings 801. The material is discharged into the inner cavity, ensuring a tight fit between the backplate 100 and the cover plate 500. The protrusion 802 on the side wall of the positioning cylinder is an outward-facing edge that abuts against the backplate 100. During the production of photovoltaic modules, the positioning cylinder needs to be placed, and the four corners of the backplate 100 are fitted onto the positioning shafts 800. Then, the battery modules are produced according to the above operating steps. In this way, the positioning cylinder is always connected to the backplate 100 and the cover plate 500 during the production process, ensuring that the backplate 100 and the cover plate 500 are aligned.

[0064] In a preferred embodiment, two electrode through holes 108 are provided on the mounting surface 102. The two electrode through holes 108 extend to communicate with the positioning groove 104 at one end. The two electrode through holes 108 are respectively sealed to two electrode posts 110. The two electrode posts 110, together with the battery cell 300 and the conductive strip 600, form a series circuit. The two electrode posts 110 protrude from the mounting surface 102. Specifically, as shown... Figure 2 , Figure 3 , Figure 11 and Figure 12 As shown, both electrode through holes 108 are connected to the leftmost positioning groove 104, and the two electrode posts 110 are respectively connected to the two conductive strips 600 in the positioning groove 104. In this way, the output end of the photovoltaic power generation circuit is extended to the outside of the back plate 100 and the cover plate 500. The two electrode posts 110 can be conveniently connected to electrical facilities for power supply, or connected to a battery for energy storage.

[0065] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A photovoltaic module with high light transmittance, characterized in that, include: The back panel (100) has a mating surface (101) and a mounting surface (102) arranged opposite to each other along its thickness direction. The mounting surface (102) is used for installation on the top of a building. A first notch (103) is provided on the mating surface (101). A plurality of positioning grooves (104) are arranged side by side at the bottom of the first notch (103). The first adhesive film layer (200) has its outer circumferential edge in contact with the inner circumferential wall of the first recess (103). The first adhesive film layer (200) is provided with strip-shaped through holes (202) arranged side by side and corresponding one-to-one with the positioning groove (104). The strip-shaped through holes (202) and the positioning groove (104) are combined to form a positioning space. The side of the first adhesive film layer (200) away from the mounting surface (102) is the positioning surface (201). The positioning surface (201) is provided with an even number of rows of positioning recesses (203). The positioning recesses (203) in adjacent rows are staggered. The positioning recesses (203) are connected between two adjacent strip-shaped through holes (202). A photovoltaic power generation layer, comprising a solar cell (300) laid on the first adhesive film layer (200), wherein the solar cell (300) is adapted to the positioning notch (203), and the side of the photovoltaic power generation layer adjacent to the mounting surface (102) is connected in series by a conductive strip (600), wherein the conductive strip (600) is disposed in the positioning space; The second adhesive film layer (400) is stacked on the side of the first adhesive film layer (200) away from the mounting surface (102); The cover plate (500) has a connecting surface (501) and a light-receiving surface (502) arranged opposite to each other along its thickness direction. The light-receiving surface (502) is used to receive sunlight. The connecting surface (501) is sealed and fitted to the mating surface (101).

2. The high light transmittance photovoltaic module according to claim 1, characterized in that: A second notch (503) is provided on the connecting surface (501), the second adhesive film layer (400) is adapted to the second notch (503), and the second notch (503) and the first notch (103) have overlapping projections on the mounting surface (102).

3. The high light transmittance photovoltaic module according to claim 1, characterized in that: The strip-shaped through hole (202) and the positioning groove (104) have overlapping projections on the mounting surface (102).

4. The high light transmittance photovoltaic module according to claim 1, characterized in that: The conductive strip (600) is connected to an insulating strip (700). The conductive strip (600) and the insulating strip (700) have the same length direction. The conductive strip (600) and the insulating strip (700) are combined to form a connecting strip, which is adapted to the positioning space.

5. The high light transmittance photovoltaic module according to claim 2, characterized in that: The back plate (100) is provided with a first positioning through hole (105), which is located on the outside of the first recess (103) and the openings at both ends are located on the mating surface (101) and the mounting surface (102) respectively. The cover plate (500) is provided with a second positioning through hole (504), which is located on the outside of the second recess (503) and the openings at both ends are located on the connecting surface (501) and the light-transmitting surface (502) respectively. The first positioning through hole (105) and the second positioning through hole (504) correspond one-to-one and are connected by a positioning shaft (800).

6. The high light transmittance photovoltaic module according to claim 5, characterized in that: The mating surface (101) is provided with a first reinforcing groove (106) surrounding the first recess (103), and the connecting surface (501) is provided with a second reinforcing groove (505) surrounding the second recess (503). The first reinforcing groove (106) and the second reinforcing groove (505) are arranged opposite each other and are interconnected. A reinforcing strip (900) is provided between the back plate (100) and the cover plate (500), and the reinforcing strip (900) is sandwiched between the first reinforcing groove (106) and the second reinforcing groove (505).

7. The high light transmittance photovoltaic module according to claim 6, characterized in that: A first connecting groove (107) is provided between the first reinforcing groove (106) and the first recess (103), and a second connecting groove (506) is provided between the second reinforcing groove (505) and the second recess (503).

8. The high light transmittance photovoltaic module according to claim 7, characterized in that: The first reinforcing groove (106) passes through the first positioning through hole (105), and the second reinforcing groove (505) passes through the second positioning through hole (504). The positioning shaft (800) is a positioning cylinder, and the side wall of the positioning cylinder is provided with a communication port (801) that communicates with the first reinforcing groove (106) and / or the second reinforcing groove (505).

9. The high light transmittance photovoltaic module according to claim 8, characterized in that: The positioning cylinder has a protrusion (802) on its circumferential sidewall, and the protrusion (802) abuts against the mounting surface (102).

10. The high light transmittance photovoltaic module according to claim 1, characterized in that: Two electrode through holes (108) are provided on the mounting surface (102). The two electrode through holes (108) extend to communicate with the positioning groove (104) at one end. The two electrode through holes (108) are respectively sealed and connected to two electrode posts (110). The two electrode posts (110) are combined with the battery cell (300) and the conductive strip (600) to form a series circuit. The two electrode posts (110) protrude from the mounting surface (102).

Images