High voltage photovoltaic panel

Abstract

This application provides a high-voltage photovoltaic panel, belonging to the field of photovoltaic panel technology. Addressing the problem of insufficient voltage in small photovoltaic panels leading to low power generation efficiency, this application provides a high-voltage photovoltaic panel comprising multiple solar cells. These cells are symmetrically distributed into a first and second solar cell group, with the cells in both groups arranged in an even-numbered array. The cells in both groups are connected in series. The first column of cells in the first group is connected to the positive terminal via a lead wire, and the first column of cells in the second group is connected to the negative terminal via a lead wire, with both leads located between the first and second groups. The last column of cells in both groups is connected in series via a jumper wire. Furthermore, a bypass diode is connected in parallel between every two columns in both groups. This application, by modifying the internal electrical structure, doubles the operating voltage and open-circuit voltage while maintaining the same power output. It also optimizes the electrical routing, bringing the positive and negative terminals of the cell leads closer together, facilitating subsequent wiring and connection to other electrical equipment.

Description

Technical Field

[0001] This application relates to the field of photovoltaic panel technology, and in particular to high-voltage photovoltaic panels. Background Technology

[0002] A photovoltaic panel, also called a photovoltaic module, is a device that converts solar energy into electrical energy. It consists of solar cells, encapsulating film, glass, a backsheet, and a frame. See also Figure 1 Traditional photovoltaic panels mostly use a two-series-parallel circuit structure, which is simple to design and symmetrical. However, its disadvantage is that the voltage is relatively low, especially in the morning and evening. When the sunlight is not strong enough and the irradiance is below a certain level, the output voltage of the photovoltaic panel is lower than the starting voltage of the inverter connected to the photovoltaic panel. The inverter stops working, which greatly affects the power generation efficiency of the photovoltaic panel.

[0003] To address this issue, the industry typically increases the number of conventional photovoltaic panels connected in series. However, for residential photovoltaic panels, installation space is usually limited (e.g., installed in narrow areas such as balconies or with relatively small roof areas), and there is not enough area to increase the number of panels to improve the series voltage. Furthermore, the increased cost associated with increasing the number of panels is a particular concern for residential photovoltaic panels. Utility Model Content

[0004] The purpose of this application is to solve the problem of insufficient voltage in small photovoltaic panels in the prior art, which leads to low power generation efficiency. Therefore, this application provides a high-voltage photovoltaic panel that, by changing the internal electrical structure, increases the operating voltage and open-circuit voltage by 2 times while keeping the product power unchanged, and optimizes the product's electrical circuitry so that the positive and negative terminals of the battery leads are close together, facilitating subsequent wiring and connection to other electrical equipment.

[0005] This application provides a high-voltage photovoltaic panel, including multiple solar cells, characterized in that the multiple solar cells are divided into a first solar cell group and a second solar cell group that are symmetrically distributed, and the multiple solar cells in the first solar cell group and the second solar cell group are arranged in an array and are in an even number of columns;

[0006] In both the first and second battery packs, multiple battery cells are connected in series. The first column of battery cells in the first battery pack is connected to the positive terminal via a lead wire, and the first column of battery cells in the second battery pack is connected to the negative terminal via a lead wire. Both leads are located in the middle of the first and second battery packs. The last column of battery cells in the first and second battery packs are connected in series via a jumper wire. Furthermore, a bypass diode is connected in parallel for every two columns of battery cells in both the first and second battery packs.

[0007] By adopting the above technical solution, the voltage is increased to twice that of ordinary products by connecting all the solar cells in the photovoltaic panel in series. This allows for greater compatibility with more string inverters and micro-inverters, increasing operating time and improving power generation efficiency without increasing the size of the photovoltaic panel, making it particularly suitable for home use. Furthermore, the jumper design connecting the two sets of solar cells brings the two ends of the battery leads closer together, facilitating subsequent wiring and connection to other electrical equipment. In addition, the use of bypass diodes for protection enhances the reliability of this high-voltage photovoltaic panel.

[0008] In some embodiments, the nth column and the (n+1)th column of the battery cells are led out by lead wires, and a bypass diode is connected in series between the two lead wires. The positive terminal of the bypass diode is connected to the positive terminal of the nth column of the battery cell, and the negative terminal of the bypass diode is connected to the negative terminal of the (n+1)th column of the battery cell. Furthermore, all the bypass diodes are connected in series, where n is an odd number.

[0009] In some embodiments, the battery cell is a half cell, and there are 56 or 72 of them. The half cells in the first battery pack and the second battery pack are arranged in a 7*4 or 9*4 pattern.

[0010] The length of each half-cell is twice its width, and each column of half-cells is arranged sequentially along the width direction.

[0011] The above technical solution uses 56 or 72 half-cells connected in series, which reduces the number of cells connected in series and the risk of disconnection. Furthermore, by using half-cells of a specific size, the overall size (width:length) of a single photovoltaic panel is approximately 1:2, which makes it easy for users to design and simulate the layout of multiple photovoltaic panels, and is simple and easy to calculate.

[0012] In some embodiments, the device further includes a frame and a laminating assembly disposed within the frame, the laminating assembly including glass, the plurality of battery cells and a backplate disposed sequentially.

[0013] The frame includes two long frames and two short frames arranged opposite each other. One of the long frames and one of the short frames has a first cut at its front end, and both the long frames and the short frames have a second cut in the middle of their front sides. The first cut and the second cut allow the surface of the glass away from the battery cell to communicate with the outside of the frame.

[0014] By adopting the above technical solution, by setting a first cut and a second cut at the end and middle of the frame, and by making the front of the glass (i.e. the surface away from the battery) connected to the outside of the frame, the dust removal function is realized, and the self-cleaning ability is further improved. That is, it ensures that the dust on the surface of the product is purified to the maximum extent when the product is used outdoors. It is also more conducive to cleaning dust when rain or maintenance cleaning, reducing the accumulation on the surface that may cover the battery inside the product and affect the normal operation and power generation of the product.

[0015] In some embodiments, the width of the first cut and the second cut is 6-8 mm.

[0016] In some embodiments, the end splicing surfaces of the long frame and the short frame are adapted bevels, and the first cut includes a first side parallel to the bevel and a second side perpendicular to and connected to the side of the corresponding long frame or the short frame.

[0017] In some embodiments, the first cutout is provided at both ends of the front side of the long frame;

[0018] Two second cutouts are provided in the middle of the front of both the long frame and the short frame;

[0019] The two second cuts provided on the long frame are evenly distributed along the length direction of the long frame;

[0020] The two second cuts on the short frame are symmetrically distributed about the center line of the short frame, and the distance between them is not less than 2 / 3 of the length of the short frame.

[0021] In some embodiments, the device further includes glass covering the plurality of solar cells, the glass having a roughness of 0.2-0.5 μm, and the surface of the glass facing away from the solar cells being covered with a hydrophobic antireflective coating.

[0022] By adopting the above technical solution, using glass with a roughness of 0.2-0.5um, the outer glass of the photovoltaic module has a smooth and delicate surface while also providing a certain degree of anti-glare effect. Furthermore, by applying a hydrophobic anti-reflective coating layer to the front of the glass, reflection is reduced while allowing rainwater and dew to quickly slide off the glass surface. This makes it less likely for dust to accumulate on the surface of the photovoltaic panel, improving the self-cleaning ability of this high-voltage photovoltaic panel, reducing maintenance costs, and making it more suitable for home use.

[0023] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the electrical structure of a photovoltaic panel in the prior art;

[0025] Figure 2 This is a schematic diagram of the structure of this application;

[0026] Figure 3 This is a schematic diagram of the electrical structure of this application;

[0027] Figure 4 This is an electrical curve diagram of this application;

[0028] Figure 5 This is a partial structural diagram of this application;

[0029] Figure 6 This is a partial structural diagram of the long border of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Frame; 2. Battery cell; 3. Jumper wire;

[0032] 10. Long border; 11. Frame; 111. Extension; 12. Card slot;

[0033] 20. Short bezel;

[0034] 30. First incision; 31. First side view; 32. Second side view;

[0035] 40. Second incision. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0037] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] It should be noted that, see Figure 1 Traditional photovoltaic (PV) panels mostly use a two-series-one-parallel circuit structure, meaning they are connected in series and then in parallel. This design is simple, symmetrical, and universal. However, its disadvantage is that the voltage is relatively low, especially in the morning and evening when sunlight is not strong enough. When the irradiance is below a certain level, the output voltage of the PV panel is lower than the starting voltage of the inverter connected to the PV panel, causing the inverter to stop working and significantly affecting the power generation efficiency of the PV panel.

[0040] Furthermore, in this method, the two ends of the battery lead wire are located on both sides of the photovoltaic panel, which makes subsequent wiring more complicated and inconvenient to connect with other electrical equipment.

[0041] Therefore, to address the above problems, this application provides a high-voltage photovoltaic panel. Please refer to... Figure 2-4 , Figure 2 This is a schematic diagram of the structure of this application; Figure 3 This is a schematic diagram of the electrical structure of this application; Figure 4 This is the electrical curve diagram for this application; and, Figure 3 Taking a photovoltaic panel with 56 half-cells (or 28 if full-cells are used) as an example, those skilled in the art can refer to this example to realize a photovoltaic panel structure with 72 half-cells.

[0042] This high-voltage photovoltaic panel includes multiple solar cells 2. The multiple solar cells 2 are symmetrically distributed into a first solar cell group and a second solar cell group, and the multiple solar cells 2 in the first and second solar cell groups are arranged in an array and in an even-numbered column, for example... Figure 2 The two dashed boxes in the middle show the first battery pack and the second battery pack, respectively. Both the first battery pack and the second battery pack include the first to fourth columns of battery cells arranged from left to right.

[0043] Multiple battery cells 2 in the first and second battery packs are connected in series, and the first and second battery packs are connected in series via jumpers, with the positive and negative terminals located in the middle of the same end of the first and second battery packs. Furthermore, a bypass diode is connected in parallel between every two rows of battery cells 2 in the first and second battery packs.

[0044] This method connects all the solar cells 2 in the photovoltaic panel in series, increasing the voltage to twice that of ordinary products. It can be adapted to a wider range of string inverters, micro inverters, etc., increasing the working time and improving the power generation efficiency. Moreover, it does not increase the size of the photovoltaic panel, making it especially suitable for residential photovoltaic panels.

[0045] Meanwhile, the jumper design connecting the first and second battery packs ensures that the positive and negative terminals are located in the middle of the same end of the first and second battery packs, facilitating subsequent wiring and connection of other electrical equipment.

[0046] Furthermore, the reliability of this high-voltage photovoltaic panel is improved by using a bypass diode for protection.

[0047] Preferably, the solar cells are half-cells, and the number is 56 or 72, which reduces the number of cells connected in series and the risk of disconnection, further improving the reliability of this high-voltage photovoltaic panel.

[0048] Table 1:

[0049]

[0050] See Table 1 and Figure 4 Taking traditional 182mm monocrystalline silicon solar cells as an example, the voltage of a single cell is generally about 0.582V. Ordinary photovoltaic panels with 36 and 28 strings of cells have voltages of about 20.95V and 16.29V, respectively. By connecting half cells in series, we can increase the voltage to about 41.9V and 32.59V, which is about twice the voltage. Therefore, when combined with photovoltaic system applications, only half the number of photovoltaic panels are needed to start a general photovoltaic inverter. This product can start the inverter at 8:30 am, 1-2 hours earlier than traditional modules, which improves the power generation efficiency and revenue of the photovoltaic system by more than 10%.

[0051] In one embodiment, the first row of cells in the first battery pack is connected to the positive terminal via a lead wire, and the first row of cells in the second battery pack is connected to the negative terminal via a lead wire, with both leads located between the first and second battery packs. The last row of cells in the first battery pack and the last row of cells in the second battery pack are connected in series via a jumper wire 3.

[0052] That is, both the first battery pack and the second battery pack are connected in series by the first battery cell 2 located on the adjacent side of the two groups (i.e., in the middle of the two groups) along the corresponding column and then to the nearest battery cell in the adjacent column, so as to realize that multiple battery cells 2 of the first battery pack and the second battery pack are connected in series.

[0053] The last battery cell 2 on the adjacent side (i.e., between the two groups) of the first and second battery packs is connected in series via jumper wire 3 to realize the series connection of the first and second battery packs.

[0054] The first battery cell 2 of the first battery pack and the second battery pack are located on adjacent sides of the two packs and are respectively connected to the positive and negative terminals.

[0055] In one embodiment, the nth column and the (n+1)th column of the multi-column battery cells 2 are led out by lead wires, and a bypass diode is connected in series between the two lead wires. The positive terminal of the bypass diode is connected to the positive terminal of the nth column of the battery cells 2, and the negative terminal of the bypass diode is connected to the negative terminal of the (n+1)th column of the battery cells 2. Furthermore, all the bypass diodes are connected in series, where n is an odd number.

[0056] In one embodiment, the half-cells in both the first and second battery packs are arranged in a 7*4 or 9*4 pattern. Furthermore, the length of each half-cell is twice its width, and the half-cells in each row are arranged sequentially along the width direction. This arrangement results in an overall photovoltaic panel size (width:length) of approximately 1:2, facilitating user design and simulation of layouts for multiple photovoltaic panels, and simplifying calculations.

[0057] It should be noted that traditional photovoltaic panels typically have a raised aluminum alloy frame covering the A-side (front) to securely encase the internal laminates. However, this overall enclosure, along with the dust and rainwater erosion caused by gravity when the panel is tilted, makes it easy for dirt to accumulate on the surface. This dirt can obstruct and affect the power generation of the internal solar cells. Over the years, the accumulated dirt becomes even more difficult to clean and may even require manual scrubbing to remove it.

[0058] Commercial photovoltaic systems are typically designed for regular maintenance by personnel or cleaning equipment. However, this application is particularly applicable to small photovoltaic panels, which are often used in residential photovoltaic systems. Residential photovoltaic panels typically cannot be maintained as regularly as commercial photovoltaic panels, and their surfaces are highly dependent on self-cleaning, while existing photovoltaic panels have poor self-cleaning capabilities.

[0059] Therefore, please refer to Figure 5-6 , Figure 5 This is a partial structural diagram of this application; Figure 6 This is a partial structural diagram of the long border of this application.

[0060] In one embodiment, the high-voltage photovoltaic panel further includes a frame 1 and a laminating assembly disposed within the frame 1. The laminating assembly includes glass, a plurality of solar cells 2 and a back sheet arranged sequentially.

[0061] The frame 1 includes two long frames 10 and two short frames 20 arranged opposite to each other. One of the long frames 10 and the short frames 20 has a first cut 30 at its front end. The first cut 30 allows the surface of the glass away from the solar cell 2 to communicate with the outside of the frame 1. That is, one side of the top corner of the laminated assembly is wrapped, while the other side is exposed. This ensures the wrapping and compressive stability of the frame 1, and improves the self-cleaning ability without affecting the strength, i.e., reducing dust accumulation. At the same time, it improves the sewage discharge, dust discharge and drainage capacity, prevents clogging, increases the drainage volume and easily washes away accumulated dust. It is especially suitable for household photovoltaic panels and reduces maintenance costs.

[0062] In one embodiment, a second cutout 40 is provided in the middle of the front side of both the long frame 10 and the short frame 20. The second cutout 40 allows the surface of the glass away from the battery cell 2 to communicate with the outside of the frame 1, thereby further improving the self-cleaning ability.

[0063] In one embodiment, the width of the first cut 30 and the second cut 40 is 6-8mm, which can ensure the cleaning effect, reduce the impact on the strength of the frame, and ensure the wrapping of the laminated components.

[0064] In one embodiment, the end splicing surfaces of the long frame 10 and the short frame 20 are adapted bevels, and the first cut 30 includes a first side surface 31 and a second side surface 32.

[0065] The first side 31 is parallel to the inclined plane, taking into account both the width of the cut entrance (i.e., the self-cleaning effect) and the good wrapping of the laminated components by the frame 1.

[0066] The second side 32 is perpendicular to and connected to the side of the corresponding long frame 10 or short frame 20, thereby increasing the cutout exit section and further improving the self-cleaning effect.

[0067] In one embodiment, the ends of the long frame 10 and the short frame 20 are joined at 45°, which is convenient to manufacture and provides good wrapping of the laminated components.

[0068] In one embodiment, the long frame 10 has a first cut 30 at both ends of the front side, which further improves the self-cleaning effect of the solar photovoltaic panel. Furthermore, the first cut 30 is not provided on the short frame 20, which can ensure the good wrapping of the laminated components by both the long frame 10 and the short frame 20.

[0069] In one embodiment, two second cutouts 40 are provided in the middle of the front side of both the long border 10 and the short border 20.

[0070] The two second cutouts 40 on the long border 10 are evenly distributed along the length of the long border 10.

[0071] The two second cuts 40 on the short border 20 are symmetrically distributed about the center line of the short border 20, and the distance between them is not less than 2 / 3 of the length of the short border 20.

[0072] The frame 1 is designed with a single bottom edge 4-hole channel and a double side 8-hole channel for ash removal and drainage. The 4 holes (6-8mm) can increase the drainage speed by 30% compared to the 2 holes at the end, and can maximize the wrapping and compressive stability of the product frame 1. It reduces dust accumulation without affecting the strength, while improving the sewage and ash removal and drainage capacity, preventing blockage, increasing the water discharge volume and making it easier to flush away accumulated dust.

[0073] In one embodiment, the two sides of the second cut 40 are arranged parallel to each other and parallel to the long frame 10, which facilitates manufacturing.

[0074] In one embodiment, the first cut 30 and the second cut 40 are formed by punching or milling to ensure the stability and strength of the front of the frame 1, which is not afraid of wind pressure from both directions. At the same time, it improves the sewage and drainage capacity, increases the allowable margin for dust blockage, increases the flood discharge capacity, and makes sewage and drainage smoother. Both long and short sides can be used, and the four-sided frame 1 can be made of composite materials such as aluminum alloy and composite fiberglass frame 1.

[0075] In one embodiment, both the long frame 10 and the short frame 20 include a frame 11 and a slot 12 located above the frame 11. The front of the long frame 10 and the short frame 20 is the top surface of the slot 12, and the edge of the laminated component is engaged in the slot 12.

[0076] In one embodiment, the frame 11 has an extension 111 parallel to the laminating assembly on the side opposite to the laminating assembly, and an accommodating space is formed between the extension 111 and the laminating assembly.

[0077] A support rod is provided between the two long frames 10 that are set opposite each other. The two ends of the support rod are locked in the corresponding receiving space and connected to the extension part 111 by fasteners. The support rod distributes the pressure on the photovoltaic module, effectively dispersing the load intensity of snow pressure, wind pressure and other loads, improving the product's load strength and compressive strength, extending the service life under severe weather conditions, and reducing the occurrence of product microcracks.

[0078] In one embodiment, the support rod is an H-shaped rod with a thickness of 1.5-2mm.

[0079] In one embodiment, the high-voltage photovoltaic panel further includes glass covering multiple solar cells 2. The glass roughness is 0.2-0.5 μm, meaning the glass on the outer side of the photovoltaic module has a smooth surface, which improves its self-cleaning ability, and this roughness also provides a certain degree of anti-glare effect.

[0080] Preferably, the surface of the glass facing away from the solar cell 2 is covered with a hydrophobic anti-reflective coating layer. While reducing reflection, it allows rainwater, dew, etc. to quickly slide off the glass surface, making it less prone to dust accumulation on the photovoltaic panel surface. This further improves the self-cleaning ability of the high-voltage photovoltaic panel, reduces maintenance costs, and makes it more suitable for home use.

[0081] The hydrophobic antireflective coating layer can be the same as the hydrophobic antireflective coating layer commonly used in existing photovoltaic panels.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-voltage photovoltaic panel, comprising multiple solar cells, characterized in that, The plurality of battery cells are divided into a first battery group and a second battery group that are symmetrically distributed, and the plurality of battery cells in the first battery group and the second battery group are arranged in an array and are in an even number of columns; In both the first and second battery packs, multiple battery cells are connected in series. The first column of battery cells in the first battery pack is connected to the positive terminal via a lead wire, and the first column of battery cells in the second battery pack is connected to the negative terminal via a lead wire. Both leads are located in the middle of the first and second battery packs. The last column of battery cells in the first and second battery packs are connected in series via a jumper wire. Furthermore, a bypass diode is connected in parallel for every two columns of battery cells in both the first and second battery packs.

2. The high-voltage photovoltaic panel according to claim 1, characterized in that, The nth and (n+1)th columns of the battery cells are led out by lead wires, and a bypass diode is connected in series between the two lead wires. The positive terminal of the bypass diode is connected to the positive terminal of the nth column of the battery cell, and the negative terminal of the bypass diode is connected to the negative terminal of the (n+1)th column of the battery cell. Furthermore, all the bypass diodes are connected in series, where n is an odd number.

3. The high-voltage photovoltaic panel according to claim 1, characterized in that, The battery cell is a half cell, and there are 56 or 72 of them. The half cells in the first battery pack and the second battery pack are arranged in a 7*4 or 9*4 pattern. The length of each half-cell is twice its width, and each column of half-cells is arranged sequentially along the width direction.

4. The high-voltage photovoltaic panel according to any one of claims 1-3, characterized in that, It also includes a frame and a laminating assembly disposed within the frame, the laminating assembly comprising glass, the plurality of battery cells and a backplate arranged sequentially; The frame includes two long frames and two short frames arranged opposite each other. One of the long frames and one of the short frames has a first cut at its front end, and both the long frames and the short frames have a second cut in the middle of their front sides. The first cut and the second cut allow the surface of the glass away from the battery cell to communicate with the outside of the frame.

5. The high-voltage photovoltaic panel according to claim 4, characterized in that, The width of the first incision and the second incision is 6-8 mm.

6. The high-voltage photovoltaic panel according to claim 4, characterized in that, The end splicing surfaces of the long frame and the short frame are adapted bevels, and the first cut includes a first side parallel to the bevel and a second side perpendicular to and connected to the side of the corresponding long frame or the short frame.

7. The high-voltage photovoltaic panel according to claim 4, characterized in that, The first cut is provided at both ends of the front side of the long frame; Two second cutouts are provided in the middle of the front of both the long frame and the short frame; The two second cuts provided on the long frame are evenly distributed along the length direction of the long frame; The two second cuts on the short frame are symmetrically distributed about the center line of the short frame, and the distance between them is not less than 2 / 3 of the length of the short frame.

8. The high-voltage photovoltaic panel according to any one of claims 1-3, characterized in that, It also includes glass, which covers the plurality of solar cells, has a roughness of 0.2-0.5 μm, and the surface of the glass facing away from the solar cells is covered with a hydrophobic antireflective coating.

Images