Photovoltaic system

Abstract

The embodiment of the invention provides a photovoltaic system, which comprises at least one photovoltaic module string group, the photovoltaic module string group comprises two columns of photovoltaic module strings arranged along a first direction, and each column of photovoltaic module string comprises a plurality of photovoltaic modules arranged along a second direction; the photovoltaic module comprises a body, a first cable and a second cable, wherein the first cable and the second cable are arranged on the back face of the body and are opposite in polarity. In two photovoltaic modules positioned at one end of the photovoltaic module string group along the second direction, the first cable of one photovoltaic module and the second cable of the other photovoltaic module extend towards the inner side of the photovoltaic module string group along the first direction and are electrically connected; all the rest first cables and all the rest second cables in the photovoltaic module string group extend towards the outer side of the photovoltaic module string group along the first direction; any two adjacent photovoltaic modules in the same column of photovoltaic module strings are electrically connected through a first cable and a second cable. The space between the photovoltaic modules can be reduced, and the generating capacity of the photovoltaic system is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic system. Background Art

[0002] As an important part of the rooftop power station, the photovoltaic system is used to convert the received solar energy into electrical energy to meet the daily production and use needs. The photovoltaic system includes multiple photovoltaic modules, and two adjacent photovoltaic modules are connected in series through positive and negative cables.

[0003] However, the existing arrangement of photovoltaic modules and cables requires that the distance between two adjacent modules is large enough to facilitate operators to obtain the terminal heads from the back of the modules and connect them. This will cause a waste of space, resulting in a reduction in the installation volume of photovoltaic modules, thereby affecting the power generation of photovoltaic modules. Summary of the invention

[0004] In view of this, the present application provides a photovoltaic system to help solve the problem of low photovoltaic module power generation caused by low installation quantity of photovoltaic modules in the prior art.

[0005] An embodiment of the present application provides a photovoltaic system, comprising at least one photovoltaic component string group, the photovoltaic component string group comprising two columns of photovoltaic component strings arranged along a first direction, each column of the photovoltaic component string comprising a plurality of photovoltaic components arranged along a second direction; the photovoltaic component comprising a main body and a first cable and a second cable arranged on the back of the main body, the first cable and the second cable having opposite polarities; of the two photovoltaic components located at one end of the photovoltaic component string group along the second direction, the first cable of one and the second cable of the other both extend along the first direction toward the inside of the photovoltaic component string group and form an electrical connection; all the remaining first cables and all the remaining second cables in the photovoltaic component string group extend along the first direction toward the outside of the photovoltaic component string group; any two adjacent photovoltaic components located in the same column of the photovoltaic component string form an electrical connection with the second cable through the first cable; the first direction is perpendicular to the second direction.

[0006] In a possible implementation, the body includes a first short side, a second short side, a first long side, and a second long side, the first short side and the second short side are relatively distributed along the first direction, and the first long side and the second long side are relatively distributed along the second direction; the first cable extends along the first long side, and the second cable extends along the second long side.

[0007] In a possible implementation manner, in the same column of the photovoltaic component string, the first cable of one of any two adjacent photovoltaic components and the second cable of the other of the two adjacent photovoltaic components are arranged adjacent to each other in the second direction.

[0008] In a possible implementation, the photovoltaic assembly further includes a first junction box and a second junction box disposed on the back side of the main body, the first cable is electrically connected to the main body through the first junction box, and the second cable is electrically connected to the main body through the second junction box; the first junction box is located in the middle of the photovoltaic assembly along the first direction, and / or the second junction box is located in the middle of the photovoltaic assembly along the first direction.

[0009] In a possible implementation, in the same column of the photovoltaic component string, the first cable of one of any two adjacent photovoltaic components is electrically connected to the second cable of the other after being bent; along the height direction of the photovoltaic component string, the projection of the bent portion of the first cable is located within the projection range of the photovoltaic component string.

[0010] In a possible implementation, the photovoltaic assembly also includes a frame installed on the main body, the frame including at least a first frame fixedly connected to the first long side and a second frame fixedly connected to the second long side; the first frame is installed with a first line card, and the first cable is connected to the first frame through the first line card; the second frame is installed with a first line card, and the second cable is connected to the second frame through the first line card.

[0011] In a possible implementation manner, along the first direction, the shortest distance between the first line card and the edge of the photovoltaic component is L1, and L1 satisfies: 15 cm≤L1≤25 cm.

[0012] In a possible implementation, the first frame is further installed with a second line card, the second line card is located on the inner side of the first line card along the first direction, and the first cable is connected to the first frame through the second line card; and / or the second frame is further installed with a second line card, the second line card is located on the inner side of the first line card along the first direction, and the second cable is connected to the second frame through the second line card.

[0013] In a possible implementation, the first line card and the second line card both include a frame card slot and a cable card slot distributed along the height direction of the photovoltaic component; the frame card slot is used to snap-fit ​​with the first frame, and the cable card slot is used to accommodate the first cable; or, the frame card slot is used to snap-fit ​​with the second frame, and the cable card slot is used to accommodate the second cable.

[0014] In a possible implementation, the photovoltaic system further includes a color steel tile and a clamp, and the photovoltaic component string group is fixed to the color steel tile by the clamp.

[0015] In the present application, when two adjacent photovoltaic components in the same photovoltaic component string are connected in series, wiring can be performed on the outside of the photovoltaic component string group. Accordingly, when a photovoltaic component needs to be replaced, repaired or maintained later, it can also be operated from the outside of the photovoltaic component string group, that is, the spacing between two adjacent photovoltaic components in the same photovoltaic component string group can be set smaller, without reserving a maintenance channel. Similarly, since the two photovoltaic component strings in the same photovoltaic component string group are wired, repaired and maintained on the outside of the photovoltaic component string group, the spacing between the two photovoltaic component strings can also be set smaller, without reserving a maintenance channel. For the photovoltaic component string group, its overall size in the first direction and the second direction can be reduced to reduce space waste. When the photovoltaic system includes multiple photovoltaic component string groups, it is only necessary to reserve a maintenance channel between the photovoltaic component string groups. Therefore, the photovoltaic system in the present application can install more photovoltaic components while the available area on the roof remains unchanged, improve the area utilization rate of the photovoltaic system, and thus increase the power generation of the photovoltaic system. Moreover, by leading the first cable and the second cable to the outside of the photovoltaic component string group for wiring, the installation, wiring and later repair, maintenance and disassembly of the photovoltaic system can be facilitated. During installation, all photovoltaic modules can be installed on the roof at the installation site first, and then wired one by one, without the need to wire in the factory in advance. In addition, this method is convenient for photovoltaic modules to be transported in single blocks, without the need to connect them into photovoltaic module strings before transportation, which is conducive to saving the transportation cost of the photovoltaic system and improving transportation efficiency.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a photovoltaic module string provided in this application; Figure 2 for Figure 1 Schematic diagram of the structure of the photovoltaic module; Figure 3 It is a schematic diagram of the local structure when two adjacent photovoltaic modules in the same photovoltaic module string are electrically connected; Figure 4 for Figure 3 A schematic diagram of the structure of the first line card in FIG. Figure 5 This is a schematic diagram of the cross-sectional structure of the photovoltaic system provided in this application.

[0019] Reference numerals: 100-PV module string; 101- photovoltaic module string; 200-Clamp; 300-color steel tile; 301-lock edge; 400-Stand; 10- Photovoltaic modules; 1-Ontology; 11- first short side; 12- second short side; 13- first long side; 14- second longest side; 2-First cable; 21- first terminal; 3- Second cable; 31- second terminal; 4- first junction box; 5- Second junction box; 6-Border; 61-first frame; 62- second frame; 63- third frame; 64- fourth frame; 7- First line card; 71-frame card slot; 711-Part 1; 712-Part 2; 72-cable slot; 721-first arc segment; 722-second arc segment; 723-Part III; 8-Second line card; 9-Barcode. DETAILED DESCRIPTION

[0020] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0021] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0023] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] Two adjacent photovoltaic modules in a photovoltaic system are generally adjacent to each other on the long sides and wired at the long sides: the junction box of the photovoltaic module is located in the middle of the photovoltaic module, and the positive and negative cables of the two adjacent photovoltaic modules are also connected in the middle of the long sides. If the photovoltaic modules are installed on the roof first and then the cables of the two adjacent photovoltaic modules are connected, the distance between the two adjacent photovoltaic modules needs to be large enough to facilitate the operator to obtain the cable terminals from the back of the module and connect them. However, this will reduce the actual use area of ​​the photovoltaic modules on the roof, reduce the number of photovoltaic modules installed, and thus reduce the power generation of the photovoltaic system; if the cables between the photovoltaic modules are connected first and then the photovoltaic modules are installed on the roof, although the distance between the adjacent photovoltaic modules can be reduced, it is not convenient for the installation of the photovoltaic modules, and the small gap after the photovoltaic modules are installed is not conducive to the subsequent repair and maintenance of the individual photovoltaic modules.

[0025] In order to solve the above problems, the present application provides a photovoltaic system, such as Figure 1 As shown, the photovoltaic system includes at least one photovoltaic component string group 100, and the photovoltaic component string group 100 includes two columns of photovoltaic component strings 101 arranged along a first direction X, and each column of photovoltaic component string 101 includes a plurality of photovoltaic components 10 arranged along a second direction Y. Each photovoltaic component 10 includes a body 1 and a first cable 2 and a second cable 3 arranged on the back of the body 1, and the polarity of the first cable 2 and the second cable 3 are opposite, that is, one of the first cable 2 and the second cable 3 is a positive cable, and the other is a negative cable. Among them, this embodiment does not limit the specific number of photovoltaic components 10 in the photovoltaic component string 101, and can be set according to the use requirements of the photovoltaic system.

[0026] Specifically, in the two photovoltaic components 10 located at one end of the photovoltaic component string group 100 along the second direction Y, the first cable 2 of one and the second cable 3 of the other extend along the first direction X toward the inside of the photovoltaic component string group 100 and form an electrical connection. All the remaining first cables 2 and all the remaining second cables 3 in the photovoltaic component string group 100 extend along the first direction X toward the outside of the photovoltaic component string group 100, and any two adjacent photovoltaic components 10 located in the same photovoltaic component string 101 are electrically connected through the first cable 2 and the second cable 3.

[0027] That is to say, in the photovoltaic component string group 100, the photovoltaic components 10 located in the same column of photovoltaic component string 101 are sequentially connected in series through the first cable 2 and the second cable 3, and at the same time, the two photovoltaic components 10 located at the same end of the two photovoltaic component strings 101 are connected in series through the first cable 2 and the second cable 3, so that all the photovoltaic components 10 of the entire photovoltaic component string group 100 are connected in series. In addition, the first cable 2 of one of the two photovoltaic components 10 located at the other end of the two photovoltaic component strings 101 is not connected to any photovoltaic component 10, but is used to connect to the inverter in the photovoltaic system, so that the direct current generated by the photovoltaic component is transmitted to the inverter through the first cable 2 and the second cable 3, and the inverter can convert the direct current into alternating current so as to be incorporated into the power grid or used by the load.

[0028] In the photovoltaic system provided by the embodiment of the present application, when two adjacent photovoltaic components 10 located in the same column of photovoltaic component string 101 are connected in series, wiring can be performed on the outside of the photovoltaic component string group 100. Accordingly, when a photovoltaic component 10 needs to be replaced, repaired or maintained later, it can also be operated from the outside of the photovoltaic component string group 100, that is, the distance between two adjacent photovoltaic components 10 in the same column of photovoltaic component string 101 can be set smaller, and there is no need to reserve a maintenance channel. Similarly, since the two columns of photovoltaic component strings 101 located in the same photovoltaic component string group 100 are wired, repaired and maintained on the outside of the photovoltaic component string group 100, the distance between the two columns of photovoltaic component strings 101 can also be set smaller, and there is no need to reserve a maintenance channel. For the photovoltaic component string group 100, its overall size in the first direction X and the second direction Y can be reduced to reduce space waste. When the photovoltaic system includes multiple photovoltaic component string groups 100, it is only necessary to reserve a maintenance channel between the photovoltaic component string groups 100.

[0029] Therefore, the photovoltaic system provided in the embodiment of the present application can install more photovoltaic modules 10 while the available area on the roof remains unchanged, thereby improving the area utilization rate of the photovoltaic system and thus increasing the power generation of the photovoltaic system. Moreover, by leading the first cable 2 and the second cable 3 to the outside of the photovoltaic module string group 100 for wiring, the installation, wiring, and later repair, maintenance, and disassembly of the photovoltaic system can be facilitated. During installation, all photovoltaic modules 10 can be installed on the roof at the installation site, and then wired in sequence, without the need to wire in advance at the factory. Moreover, this method facilitates the transportation of photovoltaic modules 10 in the form of a single block, without the need to be connected to the photovoltaic module string group 100 before transportation, which is conducive to saving the transportation cost of the photovoltaic system and improving transportation efficiency.

[0030] It should be noted that the first direction X and the second direction Y in the embodiment of the present application are perpendicular to each other. The first direction X can be specifically the width direction of the photovoltaic module string group 100, and the second direction Y can be specifically the length direction of the photovoltaic module string group 100.

[0031] In a specific embodiment, Figure 2 As shown, the body 1 includes a first short side 11, a second short side 12, a first long side 13 and a second long side 14. The first short side 11 and the second short side 12 are relatively distributed along the first direction X, and the first long side 13 and the second long side 14 are relatively distributed along the second direction Y. That is, the short sides of the two columns of photovoltaic component strings 101 are arranged adjacent to each other, and the long sides of the photovoltaic components 10 in the same column of photovoltaic component strings 101 are arranged adjacent to each other, that is, the second cable 2 and the third cable 3 are led out from the short sides of the photovoltaic components 10 to the outside of the photovoltaic component string group 100. When two adjacent photovoltaic components 10 are connected, the length of the first cable 2 and the second cable 3 exposed from the outside of the photovoltaic component string group 100 is relatively short, reducing the risk of safety hazards caused by the first cable 2 and the second cable 3 being exposed to the air and contacting rainwater.

[0032] Furthermore, if Figure 2 As shown, the first cable 2 can extend along the first long side 13, and the second cable 3 can extend along the second long side 14. Compared with the first cable 2 and the second cable 3 extending in the middle of the body 1, the first cable 2 and the second cable 3 extending along the long side of the body 1 can be arranged at the edge of the photovoltaic assembly 10, which is convenient for the care of the first cable 2 and the second cable 3, and also convenient for the wiring of two adjacent photovoltaic assemblies 10 and the subsequent maintenance and care.

[0033] like Figure 1As shown, in the same column of photovoltaic component strings 101, the first cable 2 of one of any two adjacent photovoltaic components 10 is adjacent to the second cable 3 of the other in the second direction Y, that is, the first long side 13 of one of the two adjacent photovoltaic components 10 is adjacent to the second long side 14 of the other. In this way, the required length of the connected first cable 2 and the second cable 3 can be reduced, ensuring that the wiring path of the two adjacent photovoltaic components 10 is the shortest, and there will be no crossing of the cables. On this basis, in the photovoltaic component string group 100, the first short sides 11 of the two photovoltaic components 10 adjacent along the first direction X can be both arranged on the inner side of the photovoltaic component string group 100 or both arranged on the outer side of the photovoltaic component string group 100, so that when the two photovoltaic components 10 located at the same end of the two columns of photovoltaic component strings 101 are connected in series through the first cable 2 and the second cable 3, the wiring path is the shortest and will not cross other cables.

[0034] In a specific embodiment, Figure 2 As shown, the photovoltaic assembly 10 also includes a first junction box 4 and a second junction box 5 arranged on the back of the body 1. The first junction box 4 and the second junction box 5 are used to lead the current generated inside the photovoltaic assembly 10 to the outside. Specifically, the first cable 2 is electrically connected to the body 1 through the first junction box 4, and the second cable 3 is electrically connected to the body 1 through the second junction box 5. Among them, the first junction box 4 can be arranged in the middle of the photovoltaic assembly 10 along the first direction X, so that it is convenient for the first cable 2 to be led outward, whether it is led to the left along the first direction X or led outward, the distance is the same. And / or, the second junction box 5 can be arranged in the middle of the photovoltaic assembly 10 along the first direction X, so that it is convenient for the second cable 3 to be led outward, whether it is led to the left along the first direction X or led outward, the distance is the same.

[0035] In a specific embodiment, Figure 2 As shown, the length of the first cable 2 is greater than that of the second cable 3. The first cable 2 includes a first terminal 21, and the second cable 3 includes a second terminal 31. Figure 3 As shown, in the same photovoltaic assembly string 101, the first cable 2 of one of any two adjacent photovoltaic assemblies 10 is electrically connected to the second cable 3 of the other through the plug-in cooperation of the first terminal 21 and the second terminal 31 after being bent. In this way, it can be ensured that the connection between the first terminal 21 and the second terminal 31 is located on the back of the photovoltaic assembly 10, that is, the photovoltaic assembly 10 can shield the first terminal 21 and the second terminal 31, avoiding the first terminal 21 and the second terminal 31 from being exposed outside the photovoltaic assembly 10, thereby reducing the risk of the first terminal 21 and the second terminal 31 contacting rainwater.

[0036] Furthermore, along the height direction Z of the photovoltaic component string 101, the projection of the bending portion of the first cable 2 is located within the projection range of the photovoltaic component string 101, thereby ensuring that the first cable 2 and the second cable 3 are located as a whole on the back of the photovoltaic component 10, further reducing the risk of the first cable 2 and the second cable 3 being exposed to the outside, which is beneficial to improving the service life of the photovoltaic component 10.

[0037] In a specific embodiment, Figure 2 As shown, the photovoltaic module 10 also includes a frame 6 installed on the body 1. The frame 6 is used to wrap and protect the edge of the body 1, which is beneficial to improving the structural strength of the body 1. The frame 6 at least includes a first frame 61 fixedly connected to the first long side 13 and a second frame 62 fixedly connected to the second long side 14. Of course, the frame 6 can also include a third frame 63 fixedly connected to the first short side 11 and a fourth frame 64 fixedly connected to the second short side 12. A first cable clip 7 is installed on the first frame 61, and the first cable 2 is connected to the first frame 61 through the first cable clip 7, that is, the first cable clip 7 on the first frame 61 can limit the first cable 2, thereby preventing the first cable 2 from protruding onto the roof, preventing the first cable 2 and its first terminal 21 from being soaked by rainwater in rainy days to cause electric shock accidents and other safety hazards, and avoiding the occurrence of roof damage and leakage caused by lightning strikes. Similarly, the second frame 62 is installed with the first wire card 7, and the second cable 3 is connected to the second frame 62 through the first wire card 7, that is, the first wire card on the second frame 62 can limit the second cable 3, thereby preventing the second cable 3 from falling onto the roof, preventing the second cable 3 and its second terminal 31 from being soaked by rainwater on rainy days and causing safety hazards such as electric shock accidents, and avoiding lightning strikes that cause roof damage and leakage.

[0038] The first line card 7 is fixedly connected to the first frame 61 or the second frame 62, which can ensure the installation stability of the first line card 7 and improve the limiting effect of the first line card 7 on the first cable 2 or the second cable 3 without affecting the structure of the main body 1 and the use of the photovoltaic component 10.

[0039] like Figure 3 As shown, along the first direction X, the shortest distance between the first line card 7 and the edge of the photovoltaic module 10 is L1, and L1 satisfies: 15cm≤L1≤25cm. L1 can be 15cm, 16cm, 17cm, 18cm, 19cm, 20cm, 21cm, 22cm, 23cm, 24cm or 25cm, or other values ​​within the above range, which is not limited in this embodiment.

[0040] When L1 is too small (for example, less than 15 cm), the first line card 7 is too close to the edge of the photovoltaic module 10. If the first line card 7 is used to connect the first cable 2, it will be inconvenient for the first cable 2 to be bent, and it will be impossible to connect with the second cable 3 of the adjacent photovoltaic module 10. If the first line card 7 is used to connect the second cable 3, it will also cause the connection head of the second cable 3 to be inconvenient to move, and it will be inconvenient for the second cable 3 to be connected with the first cable 2 of the adjacent photovoltaic module 10. When L1 is too large (for example, greater than 25 cm), the first line card 7 is too far from the edge of the photovoltaic module 10. Whether the first line card 7 is used to connect the first cable 2 or the second cable 3, it is easy to cause the cable to prolapse, posing a safety hazard.

[0041] Therefore, when the shortest distance L1 between the first line card 7 and the edge of the photovoltaic assembly 10 is 15 cm to 25 cm, the first line card 7 has the best limiting effect on the cable and will not affect the wiring effect between two adjacent photovoltaic assemblies 10 .

[0042] In addition, the distance between the first line card 7 for limiting the first cable 2 and the edge of the photovoltaic assembly 10 and the distance between the first line card for limiting the second cable 3 and the edge of the photovoltaic assembly 10 may be equal or unequal. The position of the first line card 7 for limiting the first cable 2 may be set closer to the edge of the photovoltaic assembly 10 to improve the installation effect of the first cable 2.

[0043] In a specific embodiment, Figure 4 As shown, the first line card 7 includes a frame card slot 71 and a cable card slot 72 distributed along the height direction Z of the photovoltaic module 10, and the opening direction of the frame card slot 71 and the opening direction of the cable card slot 72 are opposite to each other along the second direction Y. When the first line card 7 is fixed to the first frame 61, the frame card slot 71 is used to engage with the first frame 61, and the cable card slot 72 is used to accommodate the first cable 2. Similarly, when the first line card 7 is fixed to the second frame 62, the frame card slot 71 is used to engage with the second frame 62, and the cable card slot 72 is used to accommodate the second cable 3.

[0044] Specifically, Figure 4 As shown, the top wall of the frame slot 71 includes a first portion 711 and a second portion 712 that are fixedly connected, and the second portion 712 is inclined toward the inside of the frame slot 71 along the height direction Z of the first line card 7, which can improve the clamping effect of the frame slot 71 on the first frame body 61 or the second frame body 62. The first portion 711 is inclined along the height direction Z of the first line card 7 toward a direction away from the frame slot 71, which can play a guiding role in the process of the first line card 7 clamping the first frame body 61 or the second frame body 62, and is convenient for the installation of the first line card 7.

[0045] The cable slot 72 includes two fixedly connected first arc segments 721 and second arc segments 722, the first arc segment 721 is located on the inner side of the cable slot 72, and the second arc segment 722 is located on the outer side of the cable slot 72. The first arc segment 721 is used to accommodate the first cable 2 or the second cable 3. The arc size of the first arc segment 721 is larger than the arc size of the second arc segment 722, which can avoid the problem of the first cable 2 or the second cable 3 being damaged due to the first arc segment 721 being too tight, and the second arc segment 722 can reduce the risk of the first cable 2 or the second cable 3 falling off, which is conducive to improving the stability of the first cable 2 or the second cable 3 being clamped. The cable slot 72 also includes a third portion 723 fixedly connected to the second arc segment 722, and the third portion 723 can be tilted along the height direction Z of the first cable clamp 7 in a direction away from the cable slot 72 to play a guiding role, which is convenient for the clamping of the first cable 2 or the second cable 3, and can also avoid the cable slot 72 from scratching the first cable 2 or the second cable 3. In addition, the ends of the cable slot 72 and the frame slot 71 can be configured to be arc-shaped to prevent operators from being injured.

[0046] In a specific embodiment, Figure 2 and Figure 3 As shown, the first frame 61 is also installed with a second line card 8, which is located on the inner side of the first line card 7 along the first direction X, and the first cable 2 is connected to the first frame 61 through the second line card 8. That is, the second line card 8 can limit the middle section of the first cable 2, thereby improving the installation stability of the first cable 2 and reducing the risk of prolapse of the first cable 2. And / or, the second frame 62 is also installed with a second line card 8, which is located on the inner side of the first line card 7 along the first direction X, and the second cable 3 is connected to the second frame 62 through the second line card 8, that is, the second line card 8 can limit the middle section of the second cable 3, thereby improving the installation stability of the second cable 3 and reducing the risk of prolapse of the second cable 3.

[0047] The structure of the second line card 8 can be the same as that of the first line card 7 , which will not be described in detail. This embodiment does not limit the number of second line cards 8 , which can be set according to the specific length of the first cable 2 or the second cable 3 .

[0048] In this embodiment, the first cable 2 and the second cable 3 should be installed and limited before leaving the factory, and can be directly connected on site. This can avoid the situation where the cables of multiple photovoltaic modules 10 are entangled with each other during transportation, and can also improve the on-site installation efficiency of the photovoltaic modules 10.

[0049] In a specific embodiment, Figure 1As shown, a barcode 9 is also provided on the body 1. Through the barcode 9, the whole process of the photovoltaic module 10 can be traced back, including production, logistics, installation and use, so as to achieve full process traceability. The barcode 9 also stores important information of the photovoltaic module 10, such as module grade, power, electrical performance parameters, etc., which are very important for the certification, sales and after-sales service of the module. In addition, the barcode 9 can also have an anti-counterfeiting function. In order to facilitate the identification of the information of the photovoltaic module 10 at a later stage, the barcode 9 should be set on the outside of the body 1 along the first direction X.

[0050] In this embodiment, the photovoltaic module string group 100 can be directly fixed to the roof through the installation fixing structure, or it can be fixed to the color steel tile 300 of the roof through the clamp 200. Figure 5 As shown, the color steel tile 300 is laid on the roof, and a locking edge 301 is formed between two adjacent color steel tiles 300. The clamp 200 is clamped on the locking edge 301 and is used to be fixedly connected to the back of the photovoltaic module 10, so as to achieve a fixed connection between the photovoltaic module 10 and the color steel tile 300. When the photovoltaic module 10 is a lightweight module, a bracket 400 can be set on the back thereof to improve the structural strength of the photovoltaic module 10. At this time, the clamp 200 can be fixedly connected to the bracket 400 to achieve a fixed connection between the photovoltaic module 10 and the color steel tile 300.

[0051] Specifically, Figure 1 The bracket 400 shown may extend along the first direction X and be located between the first cable 2 and the third cable 3 along the second direction Y so as to avoid interference with the second cable 2 and the third cable 3 .

[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A photovoltaic system, characterized in that: Comprising at least one photovoltaic component string group (100), the photovoltaic component string group (100) comprising two columns of photovoltaic component strings (101) arranged along a first direction, each column of the photovoltaic component strings (101) comprising a plurality of photovoltaic components (10) arranged along a second direction; The photovoltaic assembly (10) comprises a body (1) and a first cable (2) and a second cable (3) arranged on the back of the body (1), wherein the polarity of the first cable (2) and the second cable (3) are opposite; Of the two photovoltaic components (10) located at one end of the photovoltaic component string group (100) along the second direction, the first cable (2) of one and the second cable (3) of the other extend along the first direction toward the inside of the photovoltaic component string group (100) and form an electrical connection; All the remaining first cables (2) and all the remaining second cables (3) in the photovoltaic component string group (100) extend along the first direction toward the outside of the photovoltaic component string group (100); Any two adjacent photovoltaic components (10) in the same column of the photovoltaic component string (101) are electrically connected via the first cable (2) and the second cable (3); The first direction is perpendicular to the second direction.

2. The photovoltaic system according to claim 1, characterized in that: The body (1) comprises a first short side (11), a second short side (12), a first long side (13) and a second long side (14); the first short side (11) and the second short side (12) are relatively distributed along the first direction, and the first long side (13) and the second long side (14) are relatively distributed along the second direction; The first cable (2) extends along the first long side (13), and the second cable (3) extends along the second long side (14).

3. The photovoltaic system according to claim 1, characterized in that: In the same column of the photovoltaic component string (101), the first cable (2) of one of any two adjacent photovoltaic components (10) and the second cable (3) of the other are arranged adjacent to each other in the second direction.

4. The photovoltaic system according to claim 1, characterized in that: The photovoltaic assembly (10) further comprises a first junction box (4) and a second junction box (5) arranged on the back of the body (1); the first cable (2) is electrically connected to the body (1) via the first junction box (4); and the second cable (3) is electrically connected to the body (1) via the second junction box (5); The first junction box (4) is located in the middle of the photovoltaic assembly (10) along the first direction, and / or the second junction box (5) is located in the middle of the photovoltaic assembly (10) along the first direction.

5. The photovoltaic system according to claim 1, characterized in that: In the same row of the photovoltaic component string (101), the first cable (2) of one of any two adjacent photovoltaic components (10) is electrically connected to the second cable (3) of the other one after being bent; Along the height direction of the photovoltaic component string (101), the projection of the bent portion of the first cable (2) is located within the projection range of the photovoltaic component string (101).

6. The photovoltaic system according to claim 2, characterized in that: The photovoltaic assembly (10) further comprises a frame (6) mounted on the body (1), the frame (6) comprising at least a first frame body (61) fixedly connected to the first long side (13) and a second frame body (62) fixedly connected to the second long side (14); The first frame (61) is installed with a first line card (7), and the first cable (2) is connected to the first frame (61) via the first line card (7); The second frame (62) is installed with a first line card (7), and the second cable (3) is connected to the second frame (62) via the first line card (7).

7. The photovoltaic system according to claim 6, characterized in that: Along the first direction, the shortest distance between the first line card (7) and the edge of the photovoltaic assembly (10) is L1, and L1 satisfies: 15 cm ≤ L1 ≤ 25 cm.

8. The photovoltaic system according to claim 6, characterized in that: The first frame (61) is further installed with a second line card (8), the second line card (8) being located on the inner side of the first line card (7) along the first direction, and the first cable (2) being connected to the first frame (61) via the second line card (8); And / or, the second frame (62) is further installed with a second line card (8), the second line card (8) is located on the inner side of the first line card (7) along the first direction, and the second cable (3) is connected to the second frame (62) via the second line card (8).

9. The photovoltaic system according to claim 8, characterized in that: The first line card (7) and the second line card (8) both comprise a frame card slot (71) and a cable card slot (72) distributed along the height direction of the photovoltaic module (10); The frame slot (71) is used for engaging with the first frame (61), and the cable slot (72) is used for accommodating the first cable (2); Alternatively, the frame slot (71) is used for engaging with the second frame (62), and the cable slot (72) is used for accommodating the second cable (3).

10. The photovoltaic system according to claim 1, characterized in that: The photovoltaic system further comprises a color steel tile (300) and a clamp (200), and the photovoltaic component string group (100) is fixed to the color steel tile (300) via the clamp (200).

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