Photovoltaic module and photovoltaic system

Abstract

The utility model is suitable for the technical field of solar cells, and provides a photovoltaic module and a photovoltaic system. The photovoltaic module comprises battery string groups, junction boxes and an information acquisition module which are connected in series, each battery string group comprises m battery strings, m is an integer greater than or equal to 1, each battery string comprises a plurality of battery pieces which are connected in series, the junction boxes comprise a first junction box and a second junction box which are electrically connected together, and the information acquisition module is connected between the first junction box and the second junction box. And the information acquisition module for detecting the current and voltage of the photovoltaic module is arranged in the first junction box or the second junction box. Therefore, the first junction box or the second junction box can be connected to the next photovoltaic module or inverter through a cable, so that the current and voltage of the photovoltaic module detected by the information acquisition module can be collected and monitored, the photovoltaic module with problems can be locked quickly, and intelligent operation and maintenance of the photovoltaic system can be realized.

Description

Technical Field

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

[0002] Photovoltaic modules are semiconductor devices that convert sunlight directly into electricity. In related technologies, PV modules are connected in series to form an array and then connected to an inverter. Data from the inverter's operation and maintenance platform can be used to monitor the array's power generation, current, voltage, and other parameters. However, the inverter can only reflect the operating status of the entire array and cannot monitor the specific operating status of each module. When an array composed of conventional modules experiences an abnormality, the system must first stop operations and then check the operating status of each module individually to identify and replace the abnormal module. This consumes considerable time and manpower, wastes the array's power generation time, and increases power station operation and maintenance costs. Therefore, how to quickly identify problematic PV modules has become a pressing issue. Utility Model Content

[0003] The present application provides a photovoltaic module and a photovoltaic system, which aim to solve the problem that when the working state of an array composed of conventional modules is abnormal, it takes a lot of time and manpower to find the abnormal module.

[0004] The photovoltaic module provided in this application includes:

[0005] Battery string groups connected in series, each of the battery string groups comprising m battery strings, wherein m is an integer greater than or equal to 1, and each of the battery strings comprises a plurality of battery cells connected in series;

[0006] A junction box, the junction box comprising a first junction box and a second junction box, the first junction box and the second junction box being electrically connected together;

[0007] An information acquisition module is provided in the first junction box or the second junction box, and is used to detect the current and voltage of the photovoltaic assembly.

[0008] Furthermore, the battery string group includes a first battery string group, a second battery string group and a third battery string group, and the junction box further includes a third junction box;

[0009] The first battery string group, the third battery string group, and the second battery string group are sequentially connected in series, the first junction box is provided in the first battery string group, the second junction box is provided in the second battery string group, the third junction box is provided in the third battery string group, and the third junction box is connected to the first junction box and the second junction box respectively.

[0010] Furthermore, the photovoltaic assembly further includes a first cable, a second cable and a third cable, the first cable connecting the first junction box and the external circuit, and the second cable connecting the second junction box and the external circuit;

[0011] When the information acquisition module is provided in the first junction box, the third cable connects the information acquisition module and the second junction box; or

[0012] When the information acquisition module is disposed in the second junction box, the third cable connects the information acquisition module and the first junction box.

[0013] Furthermore, the photovoltaic assembly further includes a first bus bar and a second bus bar, the first bus bar connects the first junction box and the third junction box, and the second bus bar connects the second junction box and the third junction box.

[0014] Furthermore, the battery string group further includes a fourth battery string group, and the junction box further includes a fourth junction box;

[0015] The first battery string group, the third battery string group, the fourth battery string group, and the second battery string group are sequentially connected in series, and the first junction box, the third junction box, the fourth junction box, and the second junction box are sequentially electrically connected together.

[0016] Furthermore, the photovoltaic assembly also includes a third bus bar, a fourth bus bar and a fifth bus bar, the third bus bar connects the first junction box and the third junction box, the fourth bus bar connects the third junction box and the fourth junction box, and the fifth bus bar connects the fourth junction box and the second junction box.

[0017] Furthermore, the first junction box is a positive electrode junction box, and the second junction box is a negative electrode junction box; or

[0018] The first junction box is a negative electrode junction box, and the second junction box is a positive electrode junction box.

[0019] Furthermore, the battery string group includes a first battery string group, a second battery string group and a third battery string group connected in series, and the junction box further includes a third junction box;

[0020] The first battery string group, the second battery string group, and the third battery string group are sequentially connected in series, the first junction box is provided in the first battery string group, the second junction box is provided in the second battery string group, the third junction box is provided in the third battery string group, and the second junction box is connected to the first junction box and the third junction box respectively.

[0021] Furthermore, the information acquisition module is arranged in the second junction box, and the photovoltaic assembly also includes a fourth cable, a fifth cable, a sixth cable and a seventh cable, the fourth cable connects the second junction box and the external circuit near the first junction box, the fifth cable connects the second junction box and the external circuit near the third junction box, the sixth cable connects the information acquisition module and the outside of the first junction box, and the seventh cable connects the information acquisition module and the outside of the third junction box.

[0022] The photovoltaic system provided in the embodiments of the present application includes the photovoltaic assembly described in any of the above embodiments.

[0023] In the photovoltaic assembly and photovoltaic system of the embodiments of the present application, the photovoltaic assembly includes: a battery string group connected in series, a junction box, and an information collection module, each battery string group includes m battery strings, where m is an integer greater than or equal to 1, each battery string includes a plurality of battery cells connected in series, the junction box includes a first junction box and a second junction box, the first junction box and the second junction box are electrically connected together, and the information collection module is disposed in the first junction box or the second junction box, and the information collection module is used to detect the current and voltage of the photovoltaic assembly. In this way, the first junction box or the second junction box can be connected to the inverter via a cable, so that the current and voltage of the photovoltaic assembly detected by the information collection module can be collected and monitored, thereby quickly identifying problematic photovoltaic assemblies and realizing intelligent operation and maintenance of the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a photovoltaic module according to an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the module structure of a junction box according to an embodiment of the present application;

[0026] Figure 3 is a schematic structural diagram of a photovoltaic system according to an embodiment of the present application;

[0027] Figure 4 is another structural schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0028] Figure 5 This is another structural diagram of a photovoltaic module according to an embodiment of the present application;

[0029] Figure 6 is another structural schematic diagram of a photovoltaic system according to an embodiment of the present application;

[0030] Figure 7 This is another structural diagram of a photovoltaic system according to an embodiment of the present application.

[0031] Description of main component symbols:

[0032] Photovoltaic assembly 100, battery string group 10, first battery string group 11, second battery string group 12, third battery string group 13, fourth battery string group 14, battery string 20, junction box 30, first junction box 31, second junction box 32, third junction box 33, fourth junction box 34, information acquisition module 40, inverter 50, first cable 61, second cable 62, third cable 63, fourth cable 64, fifth cable 65, sixth cable 66, seventh cable 67, first bus bar 71, second bus bar 72, third bus bar 73, fourth bus bar 74, fifth bus bar 75, photovoltaic system 200. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. In addition, it should be understood that the specific embodiments described herein are merely used to explain the present application and are not intended to limit the present application.

[0034] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0037] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art will appreciate the application of other processes and / or the use scenarios of other materials.

[0039] In the related art, a photovoltaic module is a semiconductor device that converts sunlight energy directly into electrical energy. In the prior art, photovoltaic modules are connected in series to form an array, which is then connected to an inverter. The power generation, current, voltage and other parameters of the entire array can be monitored through the data of the inverter operation and maintenance platform. However, the inverter can only reflect the working status of the entire array and cannot monitor the specific working status of each component. When the working status of an array composed of conventional components is abnormal, it is necessary to stop working first, and then check the working status of each component one by one to find the abnormal component and replace it. This takes a lot of time and manpower, wastes the array's power generation time, and increases the operation and maintenance costs of the power station. In this application, the information acquisition module is set in the junction box, and the junction box is connected to the inverter through a cable, so that the current and voltage of the photovoltaic modules detected by the information acquisition module can be collected and monitored, and the problematic photovoltaic modules can be quickly locked.

[0040] Example 1

[0041] See also Figure 1 and Figure 2 In the photovoltaic module 100 of the embodiment of the present application, the photovoltaic module 100 includes: a battery string group 10 connected in series, a junction box 30 and an information acquisition module 40, each battery string group 10 includes m battery strings 20, where m is an integer greater than or equal to 1, each battery string 20 includes a plurality of battery cells connected in series, the junction box 30 includes a first junction box 31 and a second junction box 32, the first junction box 31 and the second junction box 32 are electrically connected together, the information acquisition module 40 is arranged in the first junction box 31 or the second junction box 32, and the information acquisition module 40 is used to detect the current and voltage of the photovoltaic module 100.

[0042] In the photovoltaic assembly 100 of the embodiment of the present application, the photovoltaic assembly 100 includes: a battery string group 10 connected in series, a junction box 30, and an information collection module 40. Each battery string group 10 includes m battery strings 20, where m is an integer greater than or equal to 1. Each battery string 20 includes a plurality of battery cells connected in series. The junction box 30 includes a first junction box 31 and a second junction box 32, which are electrically connected together. The information collection module 40 is disposed in the first junction box 31 or the second junction box 32. The information collection module 40 is used to detect the current and voltage of the photovoltaic assembly 100. In this way, the first junction box 31 or the second junction box 32 can be connected to the inverter 50 via a cable, so that the current and voltage of the photovoltaic assembly 100 detected by the information collection module 40 can be collected and monitored, thereby quickly identifying problematic photovoltaic assemblies 100 and realizing intelligent operation and maintenance of the photovoltaic system 200.

[0043] Specifically, several cell cells are connected in series to form a cell string 20, and several cell strings 20 are connected in parallel to form a cell string group 10. For example, a photovoltaic module 100 is composed of two cell string groups 10 connected in series, and each cell string group 10 is composed of four cell strings 20. The four cell strings 20 of the first cell string group 11 are evenly divided into two upper and lower rows of cell strings 20 in a first direction. The embodiments of this application do not limit the specific parallel connection method of the cell strings 20 to meet various needs.

[0044] Of course, the number of battery strings 20 constituting the battery string group 10 can also be 5, 6, 7, and other situations. When the number of battery strings 20 constituting the battery string group 10 is an odd number, the number of battery strings 20 in the upper and lower rows of the battery string group 10 may not be equal. When the number of battery strings 20 constituting the battery string group 10 is an even number, the number of battery strings 20 in the upper and lower rows of the battery string group 10 should be equal. The embodiment of the present application does not limit the number of battery strings 20 constituting the battery string group 10, so as to meet various needs. It should be noted that the above description of the electrode orientation of the battery string 20 is only for example, and is not a limitation of the embodiment of the present application, so as to meet various needs.

[0045] Furthermore, a first junction box 31 is disposed between the upper and lower rows of battery strings 20 of the first battery string group 11, and the electrode lead ends of the first battery string group 11 are connected to the first junction box 31. Similarly, a second junction box 32 is disposed between the upper and lower rows of battery strings 20 of the second battery string group 12, and the electrode lead ends of the second battery string group 12 are connected to the first junction box 31. Furthermore, the first junction box 31 and the second junction box 32 are electrically connected internally via a bus bar, and the information acquisition module 40 can be connected to the other junction box 30 via a cable.

[0046] In addition, when the positive electrode of the photovoltaic component 100 is the positive lead-out terminal of the first battery string group 11, the positive lead-out terminal is connected to the positive electrode of the first junction box 31, and the first junction box 31 is the positive junction box 30. At this time, the negative electrode of the photovoltaic component 100 is the negative lead-out terminal of the second battery string group 12, and the negative lead-out terminal is connected to the negative electrode of the second junction box 32, and the second junction box 32 is the negative junction box 30; or, when the negative electrode of the photovoltaic component 100 is the negative lead-out terminal of the first battery string group 11, the first junction box 31 is the negative junction box 30, and at this time, the positive electrode of the photovoltaic component 100 is the positive lead-out terminal of the second battery string group 12, and the second junction box 32 is the positive junction box 30.

[0047] Furthermore, an information acquisition module 40 may be provided in the junction box 30. The information acquisition module 40 may be provided in the first junction box 31 but not in the second junction box 32. In this case, the information acquisition module 40 is connected to the second junction box 32 via a cable. Alternatively, the information acquisition module 40 may be provided in the second junction box 32 but not in the first junction box 31. In this case, the information acquisition module 40 is connected to the first junction box 31 via a cable.

[0048] At the same time, the first junction box 31 can also be connected to the inverter 50 via a cable; or the second junction box 32 can be connected to the inverter 50 via a cable. This allows the current and voltage of the photovoltaic assembly 100 detected by the information acquisition module 40 to be collected and monitored, thereby quickly identifying the problematic photovoltaic assembly 100.

[0049] Example 2

[0050] See also Figure 1 and Figure 3 In some optional embodiments, the battery string group 10 includes a first battery string group 11, a second battery string group 12 and a third battery string group 13, and the junction box 30 further includes a third junction box 33;

[0051] The first battery string group 11, the third battery string group 13 and the second battery string group 12 are connected in series in sequence. The first junction box 31 is provided in the first battery string group 11, the second junction box 32 is provided in the second battery string group 12, and the third junction box 33 is provided in the third battery string group 13. The third junction box 33 is connected to the first junction box 31 and the second junction box 32 respectively.

[0052] In this way, more battery strings 10 are connected in series, improving the performance of the photovoltaic module 100. At the same time, the same number of junction boxes 30 as the battery strings 10 is provided, so that the voltage and current of each photovoltaic module 100 can be collected and monitored in a timely manner, and problematic photovoltaic modules 100 can be quickly identified when necessary.

[0053] Specifically, the first battery string group 11, the third battery string group 13, and the second battery string group 12 are connected in series in sequence. The total negative electrode of the first battery string group 11 is connected to the total positive electrode of the third battery string group 13, and the total negative electrode of the third battery string group 13 is connected to the total positive electrode of the second battery string group 12, so that the positive electrode of the photovoltaic module 100 is the positive electrode lead-out terminal of the first battery string group 11, and the negative electrode of the photovoltaic module 100 is the negative electrode lead-out terminal of the second battery string group 12; or, the total positive electrode of the first battery string group 11 is connected to the total negative electrode of the third battery string group 13, and the total positive electrode of the third battery string group 13 is connected to the total negative electrode of the second battery string group 12, so that the positive electrode of the photovoltaic module 100 is the positive electrode lead-out terminal of the second battery string group 12, and the negative electrode of the photovoltaic module 100 is the negative electrode lead-out terminal of the first battery string group 11.

[0054] Furthermore, the first junction box 31 is disposed in the middle of the first battery string group 11 and is connected to the electrode lead-out terminals of the first battery string group 11. The second junction box 32 is disposed in the middle of the second battery string group 12 and is connected to the electrode lead-out terminals of the second battery string group 12. The third junction box 33 is disposed in the middle of the third battery string group 13 and is connected to the electrode lead-out terminals of the third battery string group 13.

[0055] Example 3

[0056] See also Figure 1 and Figure 3 In some optional embodiments, the photovoltaic assembly 100 further includes a first cable 61, a second cable 62, and a third cable 63, wherein the first cable 61 connects the first junction box 31 and the external circuit, and the second cable 62 connects the second junction box 32 and the external circuit;

[0057] When the information acquisition module 40 is disposed in the first junction box 31 , the third cable 63 connects the information acquisition module 40 and the second junction box 32 ; or

[0058] When the information acquisition module 40 is disposed in the second junction box 32 , the third cable 63 connects the information acquisition module 40 and the first junction box 31 .

[0059] In this way, different external circuits can be selected according to actual needs, so that the current and voltage of the photovoltaic assembly 100 detected by the information acquisition module 40 can be collected and monitored, and the problematic photovoltaic assembly 100 can be quickly identified.

[0060] Specifically, when a photovoltaic assembly 100 consists of only two battery strings 10, only two junction boxes 30 are required: a first junction box 31 and a second junction box 32. In this case, the first junction box 31 is connected to an external circuit via a first cable 61. For example, the first junction box 31 can be electrically connected to another photovoltaic assembly 100 via the first cable 61 to form a photovoltaic system 200. Alternatively, the first junction box 31 can be connected to an inverter 50 via the first cable 61 to convert DC power to AC power and facilitate detection of the current and voltage of the photovoltaic assembly 100.

[0061] At the same time, the second junction box 32 is connected to an external circuit via the second cable 62. For example, the second junction box 32 can be connected to another photovoltaic assembly 100 via the second cable 62 to electrically connect and form the photovoltaic system 200; or the second junction box 32 can be connected to the inverter 50 via the second cable 62 to convert DC power to AC power and facilitate detection of the current and voltage of the photovoltaic assembly 100.

[0062] At this time, the third cable 63 connects the information acquisition module 40 in the first junction box 31 and the second junction box 32 ; or the third cable 63 connects the information acquisition module 40 in the second junction box 32 and the first junction box 31 .

[0063] Furthermore, when the photovoltaic assembly 100 comprises three battery strings 10, the third cable 63 is also connected to the first junction box 31 and the second junction box 32 at the same connection position as in the above embodiment. Furthermore, when connecting the first junction box 31 and the second junction box 32, the third cable 63 also bypasses the third junction box 33. In other words, the third cable 63 bypasses the junction box 30 in the middle of the photovoltaic assembly 100 and connects to the junction boxes 30 on the far left and right sides of the photovoltaic assembly 100.

[0064] Of course, the photovoltaic module 100 can also be composed of four battery string groups 10, or five battery string groups 10, etc. The embodiment of the present application does not limit the number of battery string groups 10 that make up the photovoltaic module 100, so as to meet various needs. It should be noted that in a photovoltaic module 100, the number of junction boxes 30 is generally equal to the number of battery string groups 10. Of course, according to actual needs, a number of junction boxes 30 that is different from the number of battery string groups 10 can be set in a photovoltaic module 100. The embodiment of the present application does not limit the quantitative relationship between the battery string groups 10 and the junction boxes 30, so as to meet various needs.

[0065] Example 4

[0066] See also Figure 4 In some optional embodiments, the photovoltaic assembly 100 further includes a first bus bar 71 and a second bus bar 72 , wherein the first bus bar 71 connects the first junction box 31 and the third junction box 33 , and the second bus bar 72 connects the second junction box 32 and the third junction box 33 .

[0067] In this way, different junction boxes 30 are connected together through cables, so that the current and voltage of each photovoltaic assembly 100 can be detected by the information acquisition module 40 .

[0068] For example, in a photovoltaic assembly 100 composed of three battery strings 10, when the three junction boxes 30 are arranged in the order of first junction box 31, third junction box 33, and second junction box 32 from left to right in the second direction, the inner end of the first junction box 31, that is, the right end along the second direction, is connected to the first bus bar 71. The other end of the first bus bar 71 is connected to the left end of the third junction box 33. The right end of the third junction box 33 is connected to the second bus bar 72. The other end of the second bus bar 72 is connected to the left end of the second junction box 32. This connects the different junction boxes 30 together.

[0069] Example 5

[0070] See also Figure 5 In some optional embodiments, the battery string group 10 further includes a fourth battery string group 14, and the junction box 30 further includes a fourth junction box 34;

[0071] The first battery string group 11 , the third battery string group 13 , the fourth battery string group 14 and the second battery string group 12 are sequentially connected in series, and the first junction box 31 , the third junction box 33 , the fourth junction box 34 and the second junction box 32 are sequentially electrically connected together.

[0072] In this way, more battery strings 10 form the photovoltaic assembly 100, which can increase the rated power of the photovoltaic assembly 100. At the same time, the same number of junction boxes 30 as the battery strings 10 allows the current and voltage of each photovoltaic assembly 100 to be detected by the information acquisition module 40.

[0073] Specifically, in the second direction of the photovoltaic module 100, the cell strings 10 are connected in series from left to right in the order of first cell string group 11, third cell string group 13, fourth cell string group 14, and second cell string group 12. At the same time, a first junction box 31 is provided in the first cell string group 11, a third junction box 33 is provided in the third cell string group 13, a fourth junction box 34 is provided in the fourth cell string group 14, and a second junction box 32 is provided in the second cell string group 12. Furthermore, the first junction box 31 is electrically connected to the third junction box 33, which is in turn electrically connected to the fourth junction box 34, which is in turn electrically connected to the second junction box 32.

[0074] In addition, in the embodiments of the present application, there is no limit on the number of battery strings 20 included in the battery string group 10 to meet different requirements. For example, the second battery string group 12 may include two battery strings 20, and the busbars are used to replace the original two battery strings 20 to ensure that the second battery string group 12 can form a loop.

[0075] Example 6

[0076] See also Figure 5 In some optional embodiments, the photovoltaic assembly 100 further includes a third bus bar 73, a fourth bus bar 74 and a fifth bus bar 75, the third bus bar 73 connecting the first junction box 31 and the third junction box 33, the fourth bus bar 74 connecting the third junction box 33 and the fourth junction box 34, and the fifth bus bar 75 connecting the fourth junction box 34 and the second junction box 32.

[0077] In this way, the busbar ensures that different battery strings 10 are connected together, thereby increasing the rated power of the photovoltaic assembly 100 .

[0078] For example, in a photovoltaic assembly 100 consisting of four battery strings 10, when the junction boxes 30 are arranged from left to right in the second direction in the order of the first junction box 31, the third junction box 33, the fourth junction box 34, and the second junction box 32, the inner end of the first junction box 31, that is, the right end along the second direction, is connected to the third bus bar 73, the other end of the third bus bar 73 is connected to the left end of the third junction box 33, the right end of the third junction box 33 is connected to the fourth bus bar 74, the other end of the fourth bus bar 74 is connected to the left end of the fourth junction box 34, the right end of the fourth junction box 34 is connected to the fifth bus bar 75, and the other end of the fifth bus bar 75 is connected to the left end of the second junction box 32.

[0079] Example 7

[0080] See also Figure 1 In some optional embodiments, the first junction box 31 is a positive electrode junction box 30 and the second junction box 32 is a negative electrode junction box 30; or

[0081] The first junction box 31 is a negative electrode junction box 30 , and the second junction box 32 is a positive electrode junction box 30 .

[0082] In this way, the positions of the positive and negative electrode junction boxes 30 can be flexibly set according to the different electrode directions of the battery string group 10 to meet various needs.

[0083] Specifically, in the photovoltaic module 100 , the positive electrode lead-out terminal is connected to the positive electrode junction box 30 , and the negative electrode lead-out terminal is connected to the negative electrode junction box 30 .

[0084] In the second direction, when the positive lead-out terminal of the photovoltaic module 100 is on the left, the first junction box 31 may be the positive junction box 30 connected to the positive lead-out terminal. In this case, the negative lead-out terminal of the photovoltaic module 100 is on the right, and the second junction box 32 may be the negative junction box 30 connected to the negative lead-out terminal.

[0085] Alternatively, in the second direction, when the positive lead-out terminal of the photovoltaic component 100 is on the right side, the second junction box 32 can be the positive junction box 30, connected to the positive lead-out terminal. At this time, the negative lead-out terminal of the photovoltaic component 100 is on the left side, and the first junction box 31 is the negative junction box 30, connected to the negative lead-out terminal.

[0086] Of course, the first junction box 31 can also be set on the right side of the photovoltaic module 100, and the second junction box 32 can also be set on the left side of the photovoltaic module 100. The embodiment of the present application does not limit the specific positions of the first junction box 31 and the second junction box 32 to meet various needs.

[0087] Example 8

[0088] See also Figure 2 and Figure 6 In some optional embodiments, the battery string group 10 includes a first battery string group 11, a second battery string group 12 and a third battery string group 13 connected in series, and the junction box 30 further includes a third junction box 33;

[0089] The first battery string group 11, the second battery string group 12 and the third battery string group 13 are connected in series in sequence. The first junction box 31 is provided in the first battery string group 11, the second junction box 32 is provided in the second battery string group 12, and the third junction box 33 is provided in the third battery string group 13. The second junction box 32 is connected to the first junction box 31 and the third junction box 33 respectively.

[0090] In this way, the information acquisition module 40 can be set in the first junction box 31 or the third junction box 33, and the first junction box 31 or the third junction box 33 can be connected to the inverter 50 through a cable, so that the current and voltage of the photovoltaic component 100 detected by the information acquisition module 40 can be collected and monitored, and then the problematic photovoltaic component 100 can be quickly locked.

[0091] Specifically, the information acquisition module 40 can be installed in the first junction box 31 but not in the third junction box 33; alternatively, the information acquisition module 40 can be installed in the third junction box 33 but not in the first junction box 31. In other words, the information acquisition module 40 can be installed in a junction box 30 at one edge of the photovoltaic module 100, such as in the leftmost junction box 30 of the photovoltaic module 100 along the second direction; or in the rightmost junction box 30 of the photovoltaic module 100 along the second direction. The specific location of the information acquisition module 40 is not limited in the embodiments of this application to accommodate a variety of needs.

[0092] When the third junction box 33 is provided with the information collection module 40, the first junction box 31 is not provided with the information collection module 40. In this case, the first junction box 31 can be connected to the inverter 50 via a cable, while the third junction box 33 is not connected to the inverter 50. Alternatively, the first junction box 31 is not connected to the inverter 50, while the third junction box 33 is connected to the inverter 50 via a cable. The embodiments of the present application do not limit which junction box 30 in the photovoltaic assembly 100 is connected to the inverter 50. As long as a junction box 30 is connected to the inverter 50, it can meet various needs.

[0093] Example 9

[0094] See also Figure 2 and Figure 6 In some optional embodiments, the information acquisition module 40 is arranged in the second junction box 32, and the photovoltaic assembly 100 further includes a fourth cable 64, a fifth cable 65, a sixth cable 66 and a seventh cable 67, the fourth cable 64 connects the second junction box 32 and the external circuit near the first junction box 31, the fifth cable 65 connects the second junction box 32 and the external circuit near the third junction box 33, the sixth cable 66 connects the information acquisition module 40 and the outside of the first junction box 31, and the seventh cable 67 connects the information acquisition module 40 and the outside of the third junction box 33.

[0095] In this way, the information acquisition module 40 is installed in the intermediate junction box 30, and the two ends of the intermediate junction box 30 are connected to the external circuit via cables. As needed, the intermediate junction box 30 can be connected to other photovoltaic panels 100 via cables to improve the performance of the photovoltaic system 200, or it can be directly connected to the inverter 50 to monitor the current and voltage of the photovoltaic panels 100.

[0096] For example, in the photovoltaic assembly 100 of the eighth embodiment, the three junction boxes 30 may be arranged in the order of a first junction box 31, a second junction box 32, and a third junction box 33 from left to right in the second direction. The second junction box 32 is electrically connected at both ends to the first junction box 31 and the third junction box 33, respectively. An information acquisition module 40 is also provided in the second junction box 32.

[0097] Furthermore, a fourth cable 64 is connected to the end of the second junction box 32 near the first junction box 31. The other end of the fourth cable 64 is connected to the external circuit near the first junction box 31, that is, the other end of the fourth cable 64 is connected to the external circuit on the left side of the photovoltaic assembly 100. Furthermore, a fifth cable 65 is connected to the end of the second junction box 32 near the third junction box 33. The other end of the fifth cable 65 is connected to the external circuit near the third junction box 33, that is, the other end of the fifth cable 65 is connected to the external circuit on the right side of the photovoltaic assembly 100. A sixth cable 66 connects the information acquisition module 40 to the outside of the first junction box 31, and a seventh cable 67 connects the information acquisition module 40 to the outside of the third junction box 33, ensuring that the information acquisition module 40 can detect the current and voltage of the photovoltaic assembly 100 via the sixth and seventh cables 66 and 67.

[0098] It should be noted that the external circuit is the same as the external circuit in the third embodiment. The external circuit can be another photovoltaic assembly 100 or an inverter 50 .

[0099] In the photovoltaic assembly 100 in the embodiment of the present application, there is no limitation on which junction box 30 the information acquisition module 40 is set in. The information acquisition module 40 can be set in any junction box 30. However, it should be noted that both ends of the junction box 30 where the information acquisition module 40 is set must be connected to the external circuit through cables.

[0100] Example 10

[0101] Please refer to the photovoltaic system 200 provided in the embodiment of the present application, which includes the photovoltaic assembly 100 of the above embodiment.

[0102] In the photovoltaic assembly 100 of the embodiment of the present application, the photovoltaic assembly 100 includes: a battery string group 10 connected in series, a junction box 30, and an information collection module 40. Each battery string group 10 includes m battery strings 20, where m is an integer greater than or equal to 1. Each battery string 20 includes a plurality of battery cells connected in series. The junction box 30 includes a first junction box 31 and a second junction box 32, which are electrically connected together. The information collection module 40 is disposed in the first junction box 31 or the second junction box 32. The information collection module 40 is used to detect the current and voltage of the photovoltaic assembly 100. In this way, the first junction box 31 or the second junction box 32 can be connected to the inverter 50 via a cable, so that the current and voltage of the photovoltaic assembly 100 detected by the information collection module 40 can be collected and monitored, thereby quickly identifying problematic photovoltaic assemblies 100 and realizing intelligent operation and maintenance of the photovoltaic system 200.

[0103] In this embodiment, the photovoltaic system 200 can be applied to photovoltaic power stations, such as ground power stations, rooftop power stations, water-surface power stations, etc., and can also be applied to equipment or devices that use solar energy to generate electricity, such as user solar power supplies, solar street lights, solar cars, solar buildings, etc. Of course, it is understandable that the application scenarios of the photovoltaic system 200 are not limited to this. In other words, the photovoltaic system 200 can be applied to all fields that require solar energy to generate electricity. Taking the photovoltaic power generation system network as an example, the photovoltaic system 200 may include a photovoltaic array, a junction box, and an inverter 50. The photovoltaic array can be an array combination of multiple battery modules. For example, multiple battery modules can form multiple photovoltaic arrays. The photovoltaic array is connected to the junction box. The junction box can combine the current generated by the photovoltaic array. The combined current flows through the inverter 50 and is converted into the alternating current required by the mains power grid. After that, it is connected to the mains power grid to achieve solar power supply.

[0104] Throughout this specification, reference to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] In addition, the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A photovoltaic module, characterized in that: include: Battery string groups connected in series, each of the battery string groups comprising m battery strings, wherein m is an integer greater than or equal to 1, and each of the battery strings comprises a plurality of battery cells connected in series; A junction box, the junction box comprising a first junction box and a second junction box, the first junction box and the second junction box being electrically connected together; An information acquisition module is provided in the first junction box or the second junction box, and is used to detect the current and voltage of the photovoltaic assembly.

2. The photovoltaic module according to claim 1, characterized in that The battery string group includes a first battery string group, a second battery string group and a third battery string group, and the junction box further includes a third junction box; The first battery string group, the third battery string group, and the second battery string group are sequentially connected in series, the first junction box is provided in the first battery string group, the second junction box is provided in the second battery string group, the third junction box is provided in the third battery string group, and the third junction box is connected to the first junction box and the second junction box respectively.

3. The photovoltaic module according to claim 2, characterized in that The photovoltaic assembly further includes a first cable, a second cable, and a third cable, wherein the first cable connects the first junction box and the external circuit, and the second cable connects the second junction box and the external circuit; When the information acquisition module is provided in the first junction box, the third cable connects the information acquisition module and the second junction box; or When the information acquisition module is disposed in the second junction box, the third cable connects the information acquisition module and the first junction box.

4. The photovoltaic module according to claim 3, characterized in that The photovoltaic assembly further includes a first bus bar and a second bus bar, the first bus bar connecting the first junction box and the third junction box, and the second bus bar connecting the second junction box and the third junction box.

5. The photovoltaic module according to claim 2, characterized in that: The battery string group further includes a fourth battery string group, and the junction box further includes a fourth junction box; The first battery string group, the third battery string group, the fourth battery string group, and the second battery string group are sequentially connected in series, and the first junction box, the third junction box, the fourth junction box, and the second junction box are sequentially electrically connected together.

6. The photovoltaic module according to claim 5, characterized in that: The photovoltaic assembly further includes a third bus bar, a fourth bus bar, and a fifth bus bar. The third bus bar connects the first junction box and the third junction box, the fourth bus bar connects the third junction box and the fourth junction box, and the fifth bus bar connects the fourth junction box and the second junction box.

7. The photovoltaic module according to any one of claims 1 to 6, characterized in that: The first junction box is a positive electrode junction box, and the second junction box is a negative electrode junction box; or The first junction box is a negative electrode junction box, and the second junction box is a positive electrode junction box.

8. The photovoltaic module according to claim 1, characterized in that The battery string group includes a first battery string group, a second battery string group and a third battery string group connected in series, and the junction box further includes a third junction box; The first battery string group, the second battery string group, and the third battery string group are sequentially connected in series, the first junction box is provided in the first battery string group, the second junction box is provided in the second battery string group, the third junction box is provided in the third battery string group, and the second junction box is connected to the first junction box and the third junction box respectively.

9. The photovoltaic module according to claim 8, characterized in that: The information acquisition module is arranged in the second junction box, and the photovoltaic assembly further includes a fourth cable, a fifth cable, a sixth cable and a seventh cable, the fourth cable connecting the second junction box and an external circuit close to the first junction box, the fifth cable connecting the second junction box and an external circuit close to the third junction box, the sixth cable connecting the information acquisition module and the outside of the first junction box, and the seventh cable connecting the information acquisition module and the outside of the third junction box.

10. A photovoltaic system, characterized in that: include: The photovoltaic module according to any one of claims 1 to 9.

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