A photovoltaic cell module employing a rectangular silicon wafer

Abstract

The application discloses a photovoltaic cell assembly adopting a rectangular silicon wafer, which comprises a photovoltaic support and a photovoltaic assembly. Two ends of the photovoltaic assembly are extension parts, and the rest parts are power generation parts in a zigzag cross section. The photovoltaic assembly comprises a light-transmitting film, a front adhesive film, a cell layer, a back adhesive film and a back plate, and further comprises a polyurethane frame. The extension parts are fixed above the photovoltaic support through a fastening assembly. The photovoltaic cell assembly adopts the light-transmitting film to replace the glass to form the back of the photovoltaic assembly, thereby reducing the weight. The power generation parts are designed in a zigzag shape, thereby increasing the light receiving area and being beneficial to the reabsorption of the reflected light, improving the light absorption amount and the power generation amount. The polyurethane frame, the light-transmitting film and the back plate surround the front adhesive film, the back corner code and the cell layer, so that the frame section and the corner code are not needed to be assembled, and the extension parts are fixed on the photovoltaic support through the fastening assembly, thereby facilitating the installation and reducing the burden of workers.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic cell module using rectangular silicon wafers. Background Technology

[0002] A photovoltaic module is a module composed of several solar cells connected in series or parallel and then tightly sealed. Its function is to convert solar energy into electrical energy and then send it to a battery for storage or to power a load.

[0003] Most existing photovoltaic (PV) modules are flat cuboids, limiting their solar energy collection area. The number of silicon wafers that can be laid within the cell layers is also limited, resulting in a limited power generation per module. Furthermore, to secure and seal the solar cells, frame profiles are typically connected end-to-end along the outer perimeter of the module to form a protective closed frame structure. The use of relatively thick glass on the front of the module increases its weight, further complicating handling and installation. The frame profiles are bolted to the PV support. If the bolts are directly below the module, the shading increases installation difficulty; if they are positioned to the side, installation is easier but occupies additional space, reducing the number of modules that can be installed on the limited surface area of ​​the support. Additionally, the heat generated during operation raises the module temperature, affecting power generation efficiency. Over time, dust accumulation on the module surface is difficult to clean, blocking sunlight from reaching the cells and further reducing power generation.

[0004] Therefore, it is necessary to improve the photovoltaic cell modules in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the prior art and provide a photovoltaic cell module using rectangular silicon wafers that reduces weight, facilitates installation, increases light-receiving area and contact capacity, and keeps the surface clean to improve power generation.

[0006] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows: a photovoltaic cell module using a rectangular silicon wafer, comprising:

[0007] Photovoltaic support system;

[0008] A photovoltaic module, wherein the two ends of the photovoltaic module are extensions and the remaining part is a power generation part with a serrated cross-section, the photovoltaic module includes a light-transmitting film, a front adhesive film, a battery layer, a back adhesive film and a back sheet, all of which have serrated cross-sections. The front adhesive film, the battery layer and the back adhesive film have closed-loop filling gaps with the outer circumferential edges of the light-transmitting film and the outer circumferential edges of the back sheet. The photovoltaic module also includes a polyurethane frame adapted to the filling gaps, and the polyurethane frame is fixedly connected to the light-transmitting film, the front adhesive film, the battery layer, the back adhesive film and the back sheet.

[0009] A fastening assembly is used to secure the extension to the top of the photovoltaic bracket.

[0010] Preferably, in order to form a battery layer, the battery layer includes first batteries and second batteries spaced apart along its own length direction. Both the first batteries and the second batteries include rectangular silicon wafers connected in series, with each first battery connected in series and each second battery connected in series.

[0011] Preferably, in order to increase photovoltaic power generation, the plane where the first battery is located is at an angle of 45° to the surface where the photovoltaic module is laid, and the plane where the second battery is located is at an angle of 45° to the surface where the photovoltaic module is laid.

[0012] Preferably, in order to improve photoelectric conversion efficiency, the backplate is a hollow backplate, and the inner cavity of the backplate is used to store coolant to absorb heat from the battery layer.

[0013] Preferably, in order to enhance the cooling effect, the back plate is provided with a liquid inlet and a liquid outlet at both ends, which are connected to its own internal cavity.

[0014] Preferably, in order to clean the surface of the light-transmitting film and improve the photoelectric conversion efficiency of the photovoltaic module, the liquid outlet is connected to a cleaning component, which is used to clean the light-transmitting film.

[0015] Preferably, in order to clean the light-transmitting film, the cleaning assembly is disposed on one side of the photovoltaic module. The cleaning assembly includes an outer shell, an inner shell, and a driving unit. The side of the outer shell adjacent to the photovoltaic module is the cleaning surface. A first serrated slot is provided on the cleaning surface. The projection of the light-transmitting film on the cleaning surface is directly below the first slot. The circumferential outer edge of the inner shell is sealed to the circumferential inner wall of the outer shell. The side of the inner shell adjacent to the cleaning surface has a second slot that extends vertically and is spaced apart along the length of the photovoltaic module's power generation section. The inner shell and the outer shell enclose a rinsing chamber. The liquid outlet communicates with the rinsing chamber. The driving unit drives the outer shell to reciprocate along the length of the photovoltaic module's power generation section.

[0016] Preferably, in order to achieve fixed installation of photovoltaic modules and complete the assembly of backsheet, the backsheet includes a cylindrical shell and a shell cover detachably connected to both ends of the shell, and the fastening assembly includes a fastening bolt passing through the end of the shell cover and a fastening sleeve threadedly connected to the fastening bolt.

[0017] Preferably, in order to facilitate the assembly of the back panel, the side of the cover adjacent to the housing is provided with a protrusion that seals against the inner circumferential wall of the housing, and the protrusion is inserted into the housing.

[0018] Preferably, in order to facilitate the installation of photovoltaic modules, the top surface of the photovoltaic bracket is provided with positioning grooves arranged side by side along its own length, and the positioning grooves are adapted to the bottom of the photovoltaic modules.

[0019] In summary, compared with existing technologies, the photovoltaic cell module using rectangular silicon wafers in this invention reduces weight by replacing glass with a light-transmitting film on the back of the photovoltaic module. The power generation section adopts a sawtooth design, which increases the light receiving area and facilitates the re-absorption of light after reflection, thereby increasing the amount of light absorbed and thus increasing the power generation. The front film, back corner brackets, and cell layer are surrounded by a polyurethane frame, a light-transmitting film, and a back panel, eliminating the need to assemble frame profiles and corner brackets. With the fastening components, the extension is fixed to the photovoltaic bracket, which facilitates installation and reduces the burden on workers. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0022] Figure 3 yes Figure 1 Top view;

[0023] Figure 4 yes Figure 1 The front view;

[0024] Figure 5 yes Figure 2 An explosion diagram;

[0025] Figure 6 yes Figure 5 Enlarged view of part A;

[0026] Figure 7 This is an exploded view of the photovoltaic module of the present invention;

[0027] Figure 8 This is a schematic diagram of the battery layer structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the housing of the present invention;

[0029] Figure 10 This is a schematic diagram of the cleaning assembly of the present invention;

[0030] Figure 11 yes Figure 10 An explosion diagram;

[0031] Figure 12 yes Figure 10 An illustration of the explosion from another perspective;

[0032] In the diagram: 1. Photovoltaic bracket; 11. Positioning groove; 2. Photovoltaic module; 21. Power generation section; 22. Extension section; 23. Transparent film; 24. Front encapsulant film; 25. Battery layer; 251. First battery; 252. Second battery; 253. Rectangular silicon wafer; 26. Back encapsulant film; 27. Backplate; 271. Housing; 2711. Liquid inlet; 2712. Liquid outlet; 272. Housing cover; 2721. Protrusion 28. Polyurethane frame; 3. Fastening assembly; 31. Fastening bolt; 32. Fastening nut; 33. Sealing buffer ring; 4. Cleaning assembly; 41. Outer shell; 411. First slot; 412. Flushing inlet; 413. Third slot; 42. Inner shell; 421. Second slot; 43. Drive unit; 44. Cleaning pipe; 441. Discharge valve; 5. Water pump; 51. Inlet pipe; 52. Discharge pipe. Detailed Implementation

[0033] 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.

[0034] like Figures 1-12 As shown, the photovoltaic cell module of the present invention, which uses a rectangular silicon wafer, includes:

[0035] Photovoltaic bracket 1;

[0036] The photovoltaic module 2 has extensions 22 at both ends and power generation sections 21 with a serrated cross-section at the remaining parts. The photovoltaic module 2 includes a light-transmitting film 23 with a serrated cross-section, a front encapsulant film 24, a battery layer 25, a back encapsulant film 26, and a back sheet 27. The front encapsulant film 24, the battery layer 25, and the back encapsulant film 26 have closed-loop filling gaps with the outer circumferential edges of the light-transmitting film 23 and the back sheet 27. The photovoltaic module 2 also includes a polyurethane frame 28 adapted to the filling gaps. The polyurethane frame 28 is fixedly connected to the light-transmitting film 23, the front encapsulant film 24, the battery layer 25, the back encapsulant film 26, and the back sheet 27.

[0037] The fastening component 3 and the extension 22 are fixed to the top of the photovoltaic bracket 1 by the fastening component 3.

[0038] Specifically, in this invention, the photovoltaic support 1 is mainly in the form of a flat rectangular plate structure, which is usually installed on the top of a building. The photovoltaic support 1 is used to horizontally install the photovoltaic module 2. The length direction of the photovoltaic support 1 is parallel to the length direction of the projection of the photovoltaic module 2 on the horizontal plane, and the width direction of the photovoltaic support 1 is parallel to the width direction of the projection of the photovoltaic module 2 on the horizontal plane. In order to make full use of the photovoltaic support 1, in this invention, the outer edge of the projection of the photovoltaic module 2 on the horizontal plane is adjacent to the outer edge of the projection of the photovoltaic support 1 on the horizontal plane.

[0039] Unlike existing technologies, the photovoltaic module 2 mainly consists of a power generation section 21 and extensions 22 at both ends of the power generation section 21. The extensions 22 are elongated and parallel to the width direction of the photovoltaic support 1. The two sides of the power generation section 21 are flush with the two sides of the extensions 22. Specifically, the cross-section of the power generation section 21 in the width direction, that is, along the direction parallel to the width of the photovoltaic support 1, is sawtooth-shaped. This design makes the top surface area of ​​the power generation section 21 larger than the projected area of ​​the power generation section 21 on the photovoltaic support 1, thereby increasing the light-receiving area of ​​the power generation section 21, thus increasing the amount of sunlight that the power generation section 21 can receive and improving the power generation efficiency. Moreover, because the cross-sectional shape of the power generation section 21 is sawtooth-shaped, the power generation section 21 includes, for example,... Figure 4 The V-shaped grooves shown are connected sequentially along the length of the photovoltaic support 1, i.e., the horizontal direction in the figure. When sunlight shines on one side wall of the V-shaped groove, the sunlight is refracted and reflected. The refracted sunlight is absorbed by the battery layer 25 through the light-transmitting film 23 and the front adhesive film 24. Part of the reflected sunlight shines on the other side wall of the V-shaped groove, and after being refracted again, it is absorbed by the battery layer 25 through the light-transmitting film 23 and the front adhesive film 24 in sequence. That is, the sunlight received by the battery layer 25 includes two parts, one part is the sunlight after direct refraction, and the other part is the sunlight after being emitted and then refracted. In this way, the amount of sunlight that the photovoltaic module 2 can receive is increased, thereby improving the photovoltaic power generation efficiency.

[0040] Furthermore, in this invention, such as Figure 7As shown, the top surface of the photovoltaic module 2 uses a light-transmitting film 23 instead of a traditional glass plate. Compared with existing technologies, this significantly reduces the overall weight of the photovoltaic module 2, thus facilitating transportation and installation. The light-transmitting film 23 is preferably made of ETFE film to ensure light transmission, sealing, and waterproofing performance. Furthermore, in the photovoltaic module 2, the projections of the light-transmitting film 23 and the backsheet 27 onto the photovoltaic support 1 coincide. The projections of the front encapsulant film 24, the battery layer 25, and the back encapsulant film 26 onto the photovoltaic support 1 are located inside the projection edge of the light-transmitting film 23 onto the photovoltaic support 1. Moreover, there are closed-loop filling gaps between the front encapsulant film 24, the battery layer 25, and the backsheet 26 and the outer circumferential edges of both the light-transmitting film 23 and the backsheet 27. During the production of the photovoltaic module 2, the light-transmitting film 23 can be... After being placed downwards on a support with a serrated cross-section on the top surface, the front adhesive film 24, the battery layer 25, the back adhesive film 26, and the back sheet 27 are laid in sequence to form a gap. Liquid polyurethane is then injected into the gap. After the polyurethane cures, a polyurethane frame 28 is formed. The two ends of the polyurethane frame 28 are fixedly connected to the light-transmitting film 23 and the back sheet 27, respectively. The inner circumferential wall is fixedly connected to the edges of the front adhesive film 24, the battery layer 25, and the back adhesive film 26. Thus, the polyurethane frame 28, the light-transmitting film 23, and the back sheet 27 are fixedly connected and surround the front adhesive film 24, the battery layer 25, and the back adhesive film 26, thereby forming the photovoltaic module 2. There is no need to assemble frame profiles and corner brackets on the edges of the photovoltaic module 2, which reduces the weight and facilitates the assembly and transportation of the photovoltaic module 2.

[0041] In addition, in this invention, both ends of the photovoltaic module 2 are elongated extensions 22. When installing and fixing the photovoltaic module 2, fastening components 3 can be installed at both ends of the extensions 22 respectively. The photovoltaic module 2 is fixedly installed on the photovoltaic bracket 1 by fastening components 3. Compared with the prior art, which installs bolts and nuts on the frame profile, this not only reduces the assembly difficulty, makes the installation operation convenient, and improves the installation efficiency, but also reduces the area occupied by the photovoltaic module 2.

[0042] A further improvement is that the battery layer 25 includes first batteries 251 and second batteries 252 spaced apart along the length of the power generation section 21 of the photovoltaic module 2. Both the first battery 251 and the second battery 252 include rectangular silicon wafers 253 connected in series. Each first battery 251 is connected in series, and each second battery 252 is connected in series. The plane of the first battery 251 and the laying surface of the photovoltaic module 2 are at an angle of 45°. The plane of the second battery 252 and the laying surface of the photovoltaic module 2 are at an angle of 45°.

[0043] Specifically, such as Figure 4 , Figure 7 and Figure 8As shown, in this invention, the battery layer 25 includes eight first batteries 251 and eight second batteries 252. The eight first batteries 251 are connected in series to form one power supply, and the eight second batteries 252 are connected in series to form another power supply. The angle between the plane of the first battery 251 and the top surface of the photovoltaic support 1 (i.e., the surface on which the photovoltaic module 2 is laid) and the angle between the plane of the second battery 252 and the top surface of the photovoltaic support 1 are both 45°. This takes into account both the reflection and refraction absorption of sunlight, and ensures that the power supply of the two power supplies is generally consistent when the weather does not change drastically (e.g., from sunny to rainy), thereby guaranteeing the stable photovoltaic power generation of the photovoltaic module 2.

[0044] The first battery 251 and the second battery 252 are both made of rectangular silicon wafers 253 of the same size. As shown in the figure, the length of the V-shaped groove is slightly greater than four times that of the rectangular silicon wafer 253, and the width of the V-shaped groove is slightly greater than that of the rectangular silicon wafer 253. This makes the first battery 251 and the second battery 252 both made of four rectangular silicon wafers 253 connected tightly in sequence along the length of the V-shaped groove. Then, the first batteries 251 are connected in series and the second batteries 252 are connected in series by solder ribbons (not shown in the figure), thus forming two power supplies.

[0045] A further improvement is that the back plate 27 is a hollow back plate 27, and the inner cavity of the back plate 27 is used to store coolant to absorb the heat of the battery layer 25; the two ends of the back plate 27 are respectively provided with an inlet 2711 and an outlet 2712 communicating with its own inner cavity; the back plate 27 includes a cylindrical shell 271 and a shell cover 272 detachably connected to both ends of the shell 271; the fastening assembly 3 includes a fastening bolt 31 penetrating the end of the shell cover 272 and a fastening sleeve 32 threadedly connected to the fastening bolt 31.

[0046] Specifically, such as Figure 6 , Figure 7 and Figure 9 As shown, the back plate 27 includes a cylindrical shell 271, with shell covers 272 detachably connected to both ends of the shell 271. The shell 271 and shell covers 272 enclose the inner cavity of the back plate 27. The back plate 27 is made of glass. The inner cavity of the back plate 27 is used to store coolant, preferably water. The water in the inner cavity of the back plate 27 facilitates the absorption of heat generated by the battery layer 25 during photovoltaic power generation, thereby slowing down the heating rate of the battery layer 25's photoelectric conversion and improving the photovoltaic power generation efficiency of the battery layer 25. The inlet 2711 and outlet 2712 are respectively located below both ends of the back plate 27, for introducing coolant and discharging coolant, respectively, to replace the coolant in the shell 271 and ensure the cooling effect on the battery layer 25.

[0047] To facilitate the assembly of the back plate 27 and ensure a sealing effect, the side of the cover 272 adjacent to the housing 271 is provided with a protrusion 2721 that seals against the inner wall of the housing 271. The protrusion 2721 is inserted into the housing 271.

[0048] With the above design, the protrusion 2721 is inserted into the inner cavity of the housing 271, which facilitates the quick and accurate docking of the cover 272 and the housing 271. In the production process of photovoltaic module 2, the polyurethane frame 28 filled and solidified in the filling gap can further fill the gap between the cover 272 and the housing 271, while strengthening the connection between the cover 272 and the housing 271.

[0049] A further improvement is that the top surface of the photovoltaic bracket 1 is provided with positioning grooves 11 arranged side by side along its own length, and the positioning grooves 11 are adapted to the bottom of the photovoltaic module 2.

[0050] like Figures 1-4 As shown, since the power generation part 21 at the center of the photovoltaic module 2 in this invention is serrated, the bottom of the photovoltaic module 2 is spiked. Therefore, a positioning groove 11 is provided on the top surface of the photovoltaic bracket 1. The positioning groove 11 is adapted to the bottom of the photovoltaic module 2, thereby increasing the contact area with the bottom of the photovoltaic module 2, reducing the pressure on the photovoltaic bracket 1, and positioning the installation of the photovoltaic module 2 to prevent the photovoltaic module 2 from shifting along the length of the photovoltaic bracket 1. Then, the fastening component 3 is used for positioning, so that the photovoltaic module 2 can be firmly installed on the photovoltaic bracket 1.

[0051] like Figures 1-6 As shown, in this invention, four fastening components 3 are provided, located at the four corners of the photovoltaic module 2, for securely mounting the photovoltaic module 2 onto the photovoltaic bracket 1. Specifically, the fastening components 3 include threaded fastening bolts 31 and fastening sleeves 32. The shank of the fastening bolt 31 is fitted with an elastic sealing buffer ring 33, which is preferably made of rubber or silicone. The photovoltaic bracket 1 is provided with four mounting through holes corresponding to the fastening components 3, and the inner diameter of the mounting through holes is larger than the outer diameter of the fastening bolts 31.

[0052] With the above design, during the installation of photovoltaic module 2, after placing the bottom of photovoltaic module 2 in the positioning groove 11, the position of photovoltaic module 2 in the width direction of photovoltaic bracket 1 is adjusted so that the four corners of photovoltaic module 2 correspond to the four mounting through holes respectively. The sealing buffer ring 33 is inserted into the shank of the fastening bolt 31, so that the sealing buffer ring 33 abuts against the head of the fastening bolt 31. The shank of the fastening bolt 31 passes through the end position of the extension 22 of photovoltaic module 2 and the mounting through hole. Then, the fastening screw 32 is screwed into the bottom end of the shank of the fastening bolt 31, so that the fastening screw 32 abuts against the bottom surface of photovoltaic bracket 1. At the same time, the sealing buffer ring 33 is sandwiched between the light-transmitting film 23 and the head of the fastening bolt 31. The sealing buffer ring 33 plays a role in sealing and waterproofing, while preventing the rigid head of the fastening bolt 31 from causing wear and damage to the light-transmitting film 23, which would make the battery layer 25 easy to get water in, affecting the photovoltaic power generation of photovoltaic module 2 and shortening the service life of photovoltaic module 2.

[0053] A further improvement is that the outlet 2712 is connected to a cleaning component 4, which is used to clean the light-transmitting membrane 23.

[0054] Specifically, the cleaning component 4 is located adjacent to one side of the photovoltaic module 2. The photovoltaic module 2 has an inlet pipe 51 and an outlet pipe 52 at both ends. The inlet 2711 is connected to a water pump 5 through the inlet pipe 51. The input end of the water pump 5 is used to connect to a water source. The outlet 2712 is connected to the outlet pipe 52. The outlet pipe 52 is connected to the cleaning component 4 through the cleaning pipe 44. The cleaning pipe 44 is equipped with an outlet valve 441.

[0055] After adopting the above design, clean water from the water source is introduced into the inner cavity of the backplate 27 through the inlet pipe 51 via the water pump 5. The clean water can absorb heat and cool down the battery layer 25. The outlet valve 441 is opened periodically, and then the water pump 5 introduces clean water from the water source into the housing 271. The clean water that originally absorbed heat in the housing 271 is then transported to the cleaning component 4 through the outlet pipe 52 and the cleaning pipe 44. The cleaning component 4 rinses and cleans the top surface of the light-transmitting film 23, thereby removing dust and impurities from the surface of the light-transmitting film 23 and preventing light shading, thus ensuring the cleanliness of the surface of the light-transmitting film 23 and improving the power generation efficiency of the photovoltaic module 2. After rinsing, the water remaining on the surface of the light-transmitting film 23 can also absorb heat from the battery layer 25 through evaporation, further cooling the battery layer 25 and improving the photoelectric conversion efficiency of the photovoltaic module 2.

[0056] A further improvement is that the cleaning component 4 is disposed on one side of the photovoltaic module 2. The cleaning component 4 includes a shell 41, an inner shell 42, and a drive unit 43. The side of the shell 41 adjacent to the photovoltaic module 2 is the cleaning surface. A serrated first strip opening 411 is provided on the cleaning surface. The projection of the light-transmitting film 23 on the cleaning surface is close to the lower part of the first strip opening 411. The circumferential outer edge of the inner shell 42 is sealed and fitted to the circumferential inner wall of the shell 41. The side of the inner shell 42 adjacent to the cleaning surface has a second strip opening 421 that extends vertically and is spaced apart along the length of the power generation part 21 of the photovoltaic module 2. The inner shell 42 and the shell 41 enclose a rinsing chamber. The liquid outlet 2712 communicates with the rinsing chamber. The drive unit 43 drives the shell 41 to reciprocate along the length of the power generation part 21 of the photovoltaic module 2.

[0057] Specifically, such as Figures 1-5 , Figures 10-12 As shown, in this invention, both the outer shell 41 and the inner shell 42 are elongated strips in the same direction, extending parallel to the length of the photovoltaic support 1. One end of the outer shell 41 and one end of the inner shell 42 are open. The open ends of the outer shell 41 and the inner shell 42 are adjacent to each other, and the outer circumferential edge of the inner shell 42 is sealed and fitted to the inner circumferential wall of the outer shell 41, so that the inner shell 42 can slide along the length of the outer shell 41 inside the outer shell 41. The outer shell 41 and the inner shell 42 enclose a rinsing chamber. The closed end of the outer shell 41 is provided with a rinsing inlet 412, which is connected to the end of the cleaning pipe 44 away from the liquid outlet pipe 52. Thus, after the water pump 5 is started and the liquid outlet valve 441 is opened, the clean water in the inner cavity of the back plate 27 can be introduced into the rinsing chamber through the rinsing inlet 412.

[0058] The first strip-shaped opening 411 on the rinsing surface has the same shape as the projection of the power generation unit 21 on the rinsing surface, and the light-transmitting film 23 is adjacent to the lower side of the first strip-shaped opening 411. On the side of the inner shell 42 adjacent to the rinsing surface, there are eight second strip-shaped openings 421 that are evenly distributed along the length direction of the photovoltaic support 1. The second strip-shaped openings 421 extend in the vertical direction, and the projection of the second strip-shaped openings 421 on the rinsing surface intersects with the first strip-shaped opening 411.

[0059] After adopting the above design, clean water enters the rinsing chamber and is sprayed out sequentially through the second strip-shaped port 421 and the first strip-shaped port 411. The clean water is sprayed out at the position where the second strip-shaped port 421 and the first strip-shaped port 411 are directly connected. The drive unit 43 drives the inner shell 42 to move back and forth along the length of the photovoltaic bracket 1 inside the outer shell 41, changing the position where the second strip-shaped port 421 and the first strip-shaped port 411 are directly connected, thereby changing the spray position of the clean water. This allows the clean water to be sprayed out along a sawtooth trajectory with the same shape as the power generation part 21, thereby acting on different positions along the length of the top surface of the light-transmitting membrane 23. This allows the clean water to wash away the dust and impurities on the top surface of the light-transmitting membrane 23. After being impacted by the water flow, the dust and impurities flow out from the side of the light-transmitting membrane 23 away from the cleaning component 4, thus achieving a complete cleaning of the light-transmitting membrane 23.

[0060] For the present invention, the number of the second strip-shaped openings 421 is the same as the number of the first battery 251 and the number of the second battery 252. It is only necessary to ensure that the reciprocating movement amplitude of the inner shell 42 driven by the driving unit 43 is the width of the V-shaped groove to achieve comprehensive cleaning of the light-transmitting film 23, thereby improving the photoelectric conversion efficiency of the photovoltaic module 2.

[0061] In order to drive the inner shell 42 to reciprocate within the outer shell 41 along the length of the photovoltaic bracket 1, the outer shell 41 is provided with a third strip-shaped opening 413 extending along the length of the photovoltaic bracket 1 on the side away from the photovoltaic module 2. The inner shell 42 is fixedly connected to a connecting block that slides inside the third strip-shaped opening 413. The connecting block is fixedly connected to a moving plate. The driving unit 43 is a driving cylinder, the cylinder of which is fixed to the side of the outer shell 41 away from the photovoltaic module 2, and the piston rod is fixedly connected to the moving plate 422.

[0062] With the above design, the moving plate 422 is driven by the hydraulic cylinder to move back and forth along the length of the third strip opening 413, which in turn drives the inner shell 42 to move back and forth along the length of the photovoltaic bracket 1 inside the outer shell 41, changing the connection position between the first strip opening 411 and the second strip opening 421, thereby changing the spray position of the clean water, so that the clean water can act on different positions of the light-transmitting membrane 23, so as to achieve comprehensive cleaning of the light-transmitting membrane 23 and improve the photovoltaic power generation efficiency of the photovoltaic module 2.

[0063] 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 cell module using rectangular silicon wafers, characterized in that, include: Photovoltaic support (1); A photovoltaic module (2) has two ends as extensions (22) and the remaining parts as power generation parts (21) with a sawtooth cross-section. The photovoltaic module (2) includes a light-transmitting film (23) with a sawtooth cross-section, a front adhesive film (24), a battery layer (25), a back adhesive film (26), and a back sheet (27). The front adhesive film (24), the battery layer (25), and the back adhesive film (26) have closed-loop filling gaps with the outer periphery of the light-transmitting film (23) and the outer periphery of the back sheet (27). The photovoltaic module (2) also includes a polyurethane frame (28) adapted to the filling gaps. The polyurethane frame (28) is fixedly connected to the light-transmitting film (23), the front adhesive film (24), the battery layer (25), the back adhesive film (26), and the back sheet (27). Fastening assembly (3), the extension (22) is fixed above the photovoltaic bracket (1) by the fastening assembly (3); The backplate (27) is a hollow backplate (27), and the inner cavity of the backplate (27) is used to store coolant to absorb the heat of the battery layer (25); The back plate (27) is provided with an inlet (2711) and an outlet (2712) at both ends, which are connected to its own internal cavity. The outlet (2712) is connected to a cleaning assembly (4), which is used to clean the light-transmitting membrane (23). The cleaning assembly (4) is disposed on one side of the photovoltaic module (2). The cleaning assembly (4) includes a shell (41), an inner shell (42), and a drive unit (43). The side of the shell (41) adjacent to the photovoltaic module (2) is the cleaning surface. A serrated first slot (411) is provided on the cleaning surface. The projection of the light-transmitting film (23) on the cleaning surface is close to the bottom of the first slot (411). The circumferential outer edge of the inner shell (42) is adjacent to the outer shell (43). The inner wall of the inner shell (41) is sealed and fitted. The side of the inner shell (42) adjacent to the cleaning surface has a second strip-shaped opening (421) that extends in the vertical direction and is spaced apart along the length of the power generation part (21) of the photovoltaic module (2). The inner shell (42) and the outer shell (41) enclose to form a rinsing chamber. The liquid outlet (2712) is connected to the rinsing chamber. The driving unit (43) drives the outer shell (41) to reciprocate along the length of the power generation part (21) of the photovoltaic module (2).

2. The photovoltaic cell module using a rectangular silicon wafer according to claim 1, characterized in that: The battery layer (25) includes a first battery (251) and a second battery (252) spaced apart along the length of the power generation section (21) of the photovoltaic module (2). The first battery (251) and the second battery (252) each include a rectangular silicon wafer (253) connected in series. Each first battery (251) is connected in series and each second battery (252) is connected in series.

3. The photovoltaic cell module using a rectangular silicon wafer according to claim 2, characterized in that: The plane where the first battery (251) is located forms an angle of 45° with the surface of the photovoltaic module (2), and the plane where the second battery (252) is located forms an angle of 45° with the surface of the photovoltaic module (2).

4. The photovoltaic cell module using a rectangular silicon wafer according to claim 1, characterized in that: The back plate (27) includes a cylindrical shell (271) and a cover (272) detachably connected to both ends of the shell (271). The fastening assembly (3) includes a fastening bolt (31) penetrating the end of the cover (272) and a fastening sleeve (32) threadedly connected to the fastening bolt (31).

5. The photovoltaic cell module using a rectangular silicon wafer according to claim 4, characterized in that: The cover (272) has a protrusion (2721) on the side adjacent to the housing (271) that is sealed and fitted to the inner circumferential wall of the housing (271), and the protrusion (2721) is inserted into the housing (271).

6. The photovoltaic cell module using a rectangular silicon wafer according to claim 1, characterized in that: The top surface of the photovoltaic bracket (1) is provided with positioning grooves (11) arranged in parallel along its own length direction, and the positioning grooves (11) are adapted to the bottom of the photovoltaic module (2).

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