Photovoltaic module and photovoltaic power generation system

Abstract

The invention relates to a photovoltaic module and a photovoltaic power generation system. The photovoltaic module comprises at least two photovoltaic power generation circuits, and the at least two photovoltaic power generation circuits comprise at least one of a first photovoltaic power generation circuit and a second photovoltaic power generation circuit. Each photovoltaic power generation circuit comprises a positive terminal, a negative terminal, at least one diode and a plurality of battery pieces, the negative terminal is used for being connected with a positive electrode of an external circuit, the positive terminal is used for being connected with a negative electrode of the external circuit, and the battery pieces in each photovoltaic power generation circuit are arranged in a battery piece matrix array form. The photovoltaic power generation system comprises the photovoltaic module.

Description

Technical Field

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

[0002] Photovoltaic power generation technology, as a sustainable, pollution-free green energy technology, has garnered widespread attention and rapid development in recent years. Its basic principle is to utilize the photovoltaic effect to directly convert sunlight into electricity. Currently, photovoltaic power generation systems are widely used to power the facades of various buildings, including residential, commercial, and industrial structures.

[0003] When designing building facades, especially curtain walls for public buildings, the overall aesthetics of the building are often prioritized by minimizing the number of grids. Consequently, photovoltaic modules used for building facades are typically taller. However, with the increasing pace of urbanization, the height and size of photovoltaic modules are also being challenged.

[0004] However, due to the size limitations of current photovoltaic module testing equipment, when the size of photovoltaic modules increases, the equipment is unable to test large-size photovoltaic modules. Equipment such as power testers and crack testers are too expensive to upgrade. Therefore, suppliers rarely upgrade or update their equipment, making it difficult to test large-size photovoltaic modules. Summary of the Invention

[0005] Based on this, it is necessary to provide a photovoltaic module and a photovoltaic power generation system with independent circuits in a larger photovoltaic module size.

[0006] In a first aspect, an embodiment of the present application provides a photovoltaic assembly, the photovoltaic assembly comprising at least two photovoltaic power generation circuits, the at least two photovoltaic power generation circuits comprising at least one of a first photovoltaic power generation circuit and a second photovoltaic power generation circuit; the photovoltaic power generation circuit comprising a positive terminal, a negative terminal, at least one diode, and a plurality of solar cells, the negative terminal being configured to connect to a positive electrode of an external circuit, the positive terminal being configured to connect to a negative electrode of the external circuit, and the plurality of solar cells in each photovoltaic power generation circuit being arranged in a solar cell matrix array;

[0007] In the first photovoltaic power generation circuit, the diodes are connected in series in sequence along one direction between the positive terminal and the negative terminal, with the negative electrode of one diode connected to the positive terminal and the positive electrode of another diode connected to the negative terminal; each diode is respectively connected in parallel with at least one solar cell connected in series, and the number of solar cells connected in parallel to each diode is the same;

[0008] In the second photovoltaic power generation circuit, M photovoltaic power generation circuits and (M-1) diodes are included; the photovoltaic power generation circuit includes N battery cell strings connected in parallel, and M photovoltaic power generation circuits are connected in series. Each battery cell string includes at least one battery cell connected in series. Two adjacent photovoltaic power generation circuits are connected in parallel with a diode, and the negative pole of one diode is connected to the positive terminal, and the positive pole of one diode is connected to the negative terminal.

[0009] In an exemplary embodiment, at least two photovoltaic power generation circuits are arranged along one direction and the photovoltaic power generation circuits are independent of each other.

[0010] In an exemplary embodiment, the photovoltaic assembly is in a rectangular shape with a side length in the first direction being smaller than a side length in the second direction, and at least two photovoltaic power generation circuits are arranged in sequence along the second direction.

[0011] In an exemplary embodiment, each photovoltaic power generation circuit has the same number of cells in the first direction.

[0012] In an exemplary embodiment, the photovoltaic assembly includes two photovoltaic power generation circuits, and bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits correspond to different side lengths of the photovoltaic assembly in the first direction.

[0013] In an exemplary embodiment, the bus bars of each photovoltaic power generation circuit respectively correspond to the same side length of the photovoltaic assembly in the second direction.

[0014] In an exemplary embodiment, the operating voltages of the photovoltaic power generation circuits are the same, or the operating currents of the photovoltaic power generation circuits are the same.

[0015] In an exemplary embodiment, when the photovoltaic assembly includes at least two first photovoltaic power generation circuits and the number of cells in each first photovoltaic power generation circuit is the same, the operating voltage and the operating current of each first photovoltaic power generation circuit are the same.

[0016] In an exemplary embodiment, when the photovoltaic assembly includes a first photovoltaic power generation circuit and a second photovoltaic power generation circuit, the photovoltaic power generation circuit in the second photovoltaic power generation circuit includes two parallel-connected cell strings, and the number of cell strings in the second photovoltaic power generation circuit is twice the number of cell strings in the first photovoltaic power generation circuit, the operating voltages of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit are the same but the operating currents are different.

[0017] In a second aspect, an embodiment of the present application provides a photovoltaic power generation system, comprising the photovoltaic assembly as described in the first aspect of the present application.

[0018] The above-mentioned photovoltaic module and photovoltaic power generation system, the photovoltaic module includes at least two photovoltaic power generation circuits, the at least two photovoltaic power generation circuits include at least one of a first photovoltaic power generation circuit and a second photovoltaic power generation circuit; the photovoltaic power generation circuit includes a positive terminal, a negative terminal, at least one diode and a plurality of battery cells, the negative terminal is used to connect to the positive pole of the external circuit, the positive terminal is used to connect to the negative pole of the external circuit, and the plurality of battery cells in each photovoltaic power generation circuit are arranged in the form of a battery cell matrix array; in the first photovoltaic power generation circuit, each diode is connected in series between the positive terminal and the negative terminal in one direction, and there is a negative electrode of a diode. The first embodiment of the present invention is characterized in that the first embodiment comprises a photovoltaic module, wherein the photovoltaic module comprises a plurality of photovoltaic modules, each of which is connected to the photovoltaic module of the embodiment of the present invention, wherein the photovoltaic module comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the first embodiment of the present invention ... second embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the first embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the second embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the first embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the second embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the second embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the second embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the second embodiment of the present invention comprises a plurality of photovoltaic modules connected to the photovoltaic module of the embodiment of the present invention, wherein the second embodiment of the present invention comprises BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. 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 creative work.

[0020] Figure 1 A schematic structural diagram of a first photovoltaic power generation circuit provided in an embodiment of the present application;

[0021] Figure 2 A schematic structural diagram of a second photovoltaic power generation circuit provided in an embodiment of the present application;

[0022] Figure 3A A schematic structural diagram of a photovoltaic module provided in this embodiment;

[0023] Figure 3B The embodiments of this application provide Figure 3ASchematic diagram of the structure of the corresponding photovoltaic module;

[0024] Figure 3C The embodiments of this application provide Figure 3A Schematic diagram of the structure of the corresponding photovoltaic module;

[0025] Figure 3D A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0026] Figure 3E A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0027] Figure 4A A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0028] Figure 4B The embodiments of this application provide Figure 4A Schematic diagram of the structure of the corresponding photovoltaic module;

[0029] Figure 4C A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0030] Figure 5A A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0031] Figure 5B The embodiments of this application provide Figure 5A Schematic diagram of the structure of the corresponding photovoltaic module;

[0032] Figure 5C The embodiments of this application provide Figure 5A Schematic diagram of the structure of the corresponding photovoltaic module;

[0033] Figure 5D A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0034] Figure 6A A schematic structural diagram of another photovoltaic module provided in this embodiment;

[0035] Figure 6B The embodiments of this application provide Figure 6A Schematic diagram of the structure of the corresponding photovoltaic module;

[0036] Figure 6C This is a schematic structural diagram of another photovoltaic module provided in this embodiment. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0039] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0040] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0041] It is understood that “at least one” refers to one or more, “a plurality” refers to two or more, and “at least a portion of an element” refers to a portion or all of an element.

[0042] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, photovoltaic components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, photovoltaic components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0043] A photovoltaic module of one embodiment includes at least two photovoltaic power generation circuits, and the at least two photovoltaic power generation circuits include at least one of a first photovoltaic power generation circuit 10 and a second photovoltaic power generation circuit 20; the photovoltaic power generation circuit includes a positive terminal 12, a negative terminal 14, at least one diode 16 and a plurality of cells 18, the negative terminal 14 is used to connect to the positive pole of an external circuit, the positive terminal 12 is used to connect to the negative pole of an external circuit, and the plurality of cells 18 in each photovoltaic power generation circuit are arranged in the form of a cell matrix array.

[0044] like Figure 1 As shown, in the first photovoltaic power generation circuit 10, each diode 16 is connected in series between the positive terminal 12 and the negative terminal 14 in sequence along one direction, the negative pole of one diode 16 is connected to the positive terminal 12, and the positive pole of one diode 16 is connected to the negative terminal 14; each diode 16 is respectively connected in parallel with at least one battery cell 18 connected in series, and the number of battery cells connected in parallel to each diode 16 is the same.

[0045] like Figure 2 As shown, in the second photovoltaic power generation circuit 20, M photovoltaic power generation electronic circuits 22 and (M-1) diodes 16 are included; the photovoltaic power generation electronic circuit 22 includes N parallel-connected cell strings 24, and the M photovoltaic power generation electronic circuits 22 are connected in series. Each cell string 24 includes at least one series-connected cell 18. Two adjacent photovoltaic power generation electronic circuits 22 are connected in parallel with a diode 16, and there is a diode 16 whose cathode is connected to the positive terminal 12, and there is a diode 16 whose anode is connected to the negative terminal 14.

[0046] The photovoltaic power generation circuit is the basic unit of a photovoltaic module, used to convert sunlight into electrical energy and transmit it to an external circuit. It is easy to understand that the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 are two different photovoltaic power generation circuits with different circuit connections. In other words, the photovoltaic power generation circuit is either the first photovoltaic power generation circuit 10 or the second photovoltaic power generation circuit 20.

[0047] The photovoltaic component includes at least two photovoltaic power generation circuits, and the at least two photovoltaic power generation circuits include at least one of a first photovoltaic power generation circuit 10 and a second photovoltaic power generation circuit 20. Specifically, the photovoltaic component may include at least two first photovoltaic power generation circuits 10, may also include at least two second photovoltaic power generation circuits 20, or may include at least one first photovoltaic power generation circuit 10 and at least one second photovoltaic power generation circuit 20.

[0048] The positive terminal 12 is a conductive component used to connect the positive electrode of an external circuit in the photovoltaic power generation circuit.

[0049] The negative electrode terminal 14 is a conductive component used to connect to the negative electrode of an external circuit in the photovoltaic power generation circuit.

[0050] A busbar, located between the positive terminal 12 and the negative terminal 14 of a photovoltaic power generation circuit, is a metal strip conductor that can be used to collect and transmit current. In a photovoltaic power generation circuit, the busbar collects the current generated by the solar cells 18 and efficiently transmits it to the external circuit.

[0051] The diode 16 is used to provide a low-impedance path so that the current can bypass the faulty cell 18 when there is a faulty cell 18 that is blocked, damaged or has degraded performance in the photovoltaic power generation circuit, so as to avoid the hot spot phenomenon of local overheating in the photovoltaic power generation circuit, thereby ensuring the reliability of the photovoltaic power generation circuit. That is to say, the diode 16 is a bypass diode in the photovoltaic power generation circuit.

[0052] The photovoltaic power generation circuit is connected to the external circuit to form a closed loop, ensuring that the current generated when the solar energy absorbed by the photovoltaic power generation circuit is converted into electrical energy can continuously flow from the photovoltaic power generation circuit to the external circuit, so that the photovoltaic power generation circuit can power the external circuit.

[0053] Solar cell 18 is the most basic photoelectric conversion element in a photovoltaic power generation circuit. Solar cell 18 can directly convert sunlight into electrical energy. Alternatively, solar cell 18 may include a monocrystalline silicon cell, a polycrystalline silicon cell, or other types of cells.

[0054] Optionally, in order to ensure that the photovoltaic power generation circuit has a high consistency, each cell 18 in the photovoltaic power generation circuit has the same resistance value.

[0055] The size of the battery cell 18 can be 182mm*182mm, 182mm*192mm, 182mm*210mm or other sizes.

[0056] In the same photovoltaic power generation circuit, when the number of diodes 16 is greater than or equal to 2, a diode 16 whose negative pole (i.e., the output end of the diode 16) is connected to the positive terminal 12, and a diode 16 whose positive pole (i.e., the input end of the diode 16) is connected to the negative terminal 14 are respectively the first diode 16 and the last diode 16 in the photovoltaic power generation circuit, or it can also be understood that they are the diodes 16 at the two end positions in the photovoltaic power generation circuit; when the number of diodes 16 is one, the cathode of the diode 16 is connected to the positive terminal 12, and the positive pole of the diode 16 is connected to the negative terminal 14.

[0057] Optionally, in the photovoltaic power generation circuit, the spacing between adjacent cells 18 arranged in a cell matrix array may be the same. Further, the row spacing and column spacing between adjacent cells 18 may be the same.

[0058] Optionally, the spacing between the battery cells 18 may be 0.8 mm, 2 mm, or other distances. This spacing may be the row spacing and / or column spacing between adjacent battery cells 18 .

[0059] Optionally, in the first photovoltaic power generation circuit 10 , each diode 16 may be connected in parallel with 12, 18, 24 or other numbers of solar cells 18 connected in series.

[0060] Optionally, in the second photovoltaic power generation circuit 20 , each cell string may include 6, 9, 12 or other numbers of cells 18 connected in series.

[0061] The number of cells in the first photovoltaic power generation circuit 10 is the product of the number of diodes 16 and the number of series-connected cells 18 to which each diode 16 is connected in parallel.

[0062] The diodes 16 are connected in series in sequence along one direction, which means that in the same direction, the cathode of the previous diode 16 is connected in series with the anode of the next diode 16 .

[0063] The multiple cells 18 in the photovoltaic power generation circuit are arranged in an electrode matrix array format, which means that the multiple cells 18 in the photovoltaic power generation circuit are arranged in an electrode matrix array format with at least two rows and at least two columns. Based on this, in the first photovoltaic power generation circuit 10, each diode 16 is connected in parallel to at least one series-connected cell 18, arranged in an electrode matrix array format with at least two rows and two columns; in the second photovoltaic power generation circuit 20, each photovoltaic power generation sub-circuit 22 includes N parallel-connected cell strings 24, and the multiple cells 18 are arranged in an electrode matrix array format with at least two rows and two columns.

[0064] For example, in the first photovoltaic power generation circuit 10, when each diode 16 is connected in parallel to 12 series-connected cells 18, the 24 cells 18 connected in parallel to each diode 16 are arranged in an electrode sheet matrix array format with two columns, each column having 12 cells 18. It should be noted that although these 24 cells 18 are arranged in an electrode sheet matrix array format, they are internally connected in series. Specifically, there is a bend in the connection line between the 12th cell 18 and the 13th cell 18.

[0065] In the second photovoltaic power generation circuit 20 , both ends of the photovoltaic power generation circuit 22 are respectively connected to the busbars between the positive terminal 12 and the negative terminal 14 of the second photovoltaic power generation circuit.

[0066] M is an integer greater than or equal to 2, and accordingly, (M-1) is an integer greater than or equal to 1.

[0067] Optionally, N=2, and each cell string 24 included in the photovoltaic power generation electronic circuit 22 may include 6, 9, 12 or other numbers of cells 18 connected in series.

[0068] It is easy to understand that, because the first photovoltaic power generation circuit 10 forms a series connection between the multiple cells 18 in the normal operating state, the total resistance of the first photovoltaic power generation circuit 10 is the series resistance of the multiple cells 18. In other words, the total resistance of the first photovoltaic power generation circuit 10 is positively correlated with the number of cells in the first photovoltaic power generation circuit 10. For example, the total resistance of the first photovoltaic power generation circuit 10 in the normal operating state is represented as R1, the number of cells in the first photovoltaic power generation circuit 10 is represented as L1, and the resistance of a single cell 18 is represented as R0. Based on the circuit connection principle, it is easy to understand that R1 = L1 * R0.

[0069] It is easy to understand that the total resistance of the second photovoltaic power generation circuit 20 under normal operating conditions is the product of the resistance of the N parallel-connected cell strings 24 in each photovoltaic power generation circuit 22 and the number M of photovoltaic power generation circuits 22. For example, when the photovoltaic power generation circuit 22 includes N cell strings, the total resistance of the second photovoltaic power generation circuit 20 under normal operating conditions is represented as R2, the number of at least one series-connected cell included in each cell string is represented as L2, and the resistance of a single cell 18 is represented as R0. Based on the circuit connection principle, it is easy to understand that R2 = (1 / N) * L2 * R0 * M.

[0070] Optionally, in addition to including at least two photovoltaic power generation circuits, the photovoltaic module may further include a front glass, a front encapsulation layer, a back encapsulation layer, and a back glass. Optionally, the at least two photovoltaic power generation circuits are located between the front encapsulation layer and the back encapsulation layer, the front glass is located on a side of the front encapsulation layer away from the at least two photovoltaic power generation circuits, and the back glass is located on a side of the back encapsulation layer away from the at least two photovoltaic power generation circuits.

[0071] Optionally, the photovoltaic module is an integrated photovoltaic module formed by laminating materials such as front glass, front encapsulation layer, at least two photovoltaic power generation circuits, back encapsulation layer and back glass to achieve structural integration.

[0072] Alternatively, the photovoltaic modules may be applied to the facades of buildings such as public buildings, residential buildings, industrial buildings, agricultural buildings, and the like.

[0073] Optionally, the size of a photovoltaic module is determined by the size of at least two photovoltaic power generation circuits. The size of a photovoltaic power generation circuit is determined by the size of the cell 18, the number of cells, and the spacing between adjacent cells 18. It can also be understood that the size of a photovoltaic power generation circuit is determined by the size of the cell matrix array therein. Optionally, if the busbars of the photovoltaic power generation circuit are placed upward, the height of a photovoltaic power generation circuit can be 1.2m to 1.4m. Thus, in the case where the photovoltaic module includes two photovoltaic power generation circuits arranged vertically, the height of the photovoltaic module can reach 2.4m to 2.8m. Similarly, in the case where the number of photovoltaic power generation circuits is greater, the photovoltaic module can also have a correspondingly higher height.

[0074] For example, it is assumed that the first direction is the horizontal direction and the second direction is the vertical direction. In the first photovoltaic power generation circuit 10, it is assumed that the size of the cell 18 is 182mm*182mm, the number of cells connected in parallel to each diode 16 is 24, and the spacing between each cell 18 is 2mm. In the case where the photovoltaic assembly includes two first photovoltaic power generation circuits 10 arranged along the second direction, the height of the photovoltaic assembly along the second direction is 2.4m; in the case where the photovoltaic assembly includes three first photovoltaic power generation circuits 10 arranged along the second direction, the height of the photovoltaic assembly along the second direction is 3.6m. It is easy to understand that by selecting a larger cell 18 in the first photovoltaic power generation circuit 10, increasing the number of cells connected in parallel to each diode 16, or increasing the spacing between adjacent cells 18, the width of the photovoltaic assembly along the first direction or the height along the second direction can be further increased. Therefore, the photovoltaic assembly provided in this embodiment can meet the photovoltaic power generation needs of large-sized building facades.

[0075] Similarly, by selecting larger cells 18 in the second photovoltaic power generation circuit 20, increasing the number of at least one cell connected in series in each cell string, or increasing the spacing between adjacent cells 18, the width of the photovoltaic assembly along the first direction or the height along the second direction can also be further increased.

[0076] It should be noted that if Figure 1 The number of diodes in the first photovoltaic power generation circuit 10 shown, the number of cells connected in parallel to each diode 16, and the number of cells connected in parallel to each diode 16, as shown in FIG. Figure 2 The number of photovoltaic power generation circuits 22 in the second photovoltaic power generation circuit 20 shown, the number of cell strings 24 included in each photovoltaic power generation circuit 22, the number of cells connected in series in each cell string 24, and the number of diodes are only used as an example for explanation. It is easy to understand that in the specific implementation, the above numbers can be adjusted and changed. Figure 1 as well as Figure 2 The specific types of the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 are not limited.

[0077] The photovoltaic assembly comprises at least two photovoltaic power generation circuits, wherein the at least two photovoltaic power generation circuits comprise at least one of a first photovoltaic power generation circuit and a second photovoltaic power generation circuit; the photovoltaic power generation circuit comprises a positive terminal, a negative terminal, at least one diode and a plurality of cells, the negative terminal being used to connect to the positive electrode of an external circuit, the positive terminal being used to connect to the negative electrode of an external circuit, and the plurality of cells in each photovoltaic power generation circuit being arranged in the form of a cell matrix array; in the first photovoltaic power generation circuit, the diodes are sequentially connected in series between the positive terminal and the negative terminal along one direction, and there is a diode whose negative electrode is connected to the positive terminal. The anode of a diode is connected to the cathode terminal; each diode is connected in parallel with at least one series-connected cell, and the number of cells connected in parallel to each diode is the same; in the second photovoltaic power generation circuit, M photovoltaic power generation circuits and (M-1) diodes are included; the photovoltaic power generation circuit includes N parallel-connected cell strings, the M photovoltaic power generation circuits are connected in series, each cell string includes at least one series-connected cell, two adjacent photovoltaic power generation circuits are connected in parallel with a diode, the cathode of one diode is connected to the anode terminal, and the anode of one diode is connected to the cathode terminal. The photovoltaic module provided by this embodiment includes at least two photovoltaic power generation circuits, thereby, on the one hand, the photovoltaic module can have a larger size to meet the photovoltaic power generation needs of large-sized building facades, and on the other hand, the photovoltaic module has at least two independent circuits in the larger photovoltaic module size, based on which the independent circuits can be tested separately, thereby significantly simplifying the testing work of large-sized photovoltaic modules.

[0078] It is easy to understand that based on the same type and number of electrical components, through a mirror-symmetric design in the first direction or the second direction, two different circuit styles can be formed based on the same photovoltaic power generation circuit. These two circuit styles maintain the same electrical performance and function, but are physically arranged in a mirror-symmetric relationship. Optionally, the mirror-symmetric relationship can be a mirror-symmetric relationship along the axis of symmetry in the first direction, or a mirror-symmetric relationship along the axis of symmetry in the second direction.

[0079] In an exemplary embodiment, at least two photovoltaic power generation circuits are arranged along one direction and the photovoltaic power generation circuits are independent of each other.

[0080] Optionally, at least two photovoltaic power generation circuits are arranged along a direction, which may refer to each photovoltaic power generation circuit being arranged along a first direction or a second direction. Optionally, the first direction refers to a horizontal direction and the second direction refers to a vertical direction. Based on this, the photovoltaic assembly may include a row of photovoltaic power generation circuits or a column of photovoltaic power generation circuits.

[0081] In the same photovoltaic module, each photovoltaic power generation circuit is independent of each other, which can mean that there is an electrical distance between each photovoltaic power generation circuit.

[0082] Electrical spacing refers to the physical distance between two adjacent photovoltaic power generation circuits to prevent them from accidentally connecting within a photovoltaic module. The electrical spacing between two adjacent photovoltaic power generation circuits within a photovoltaic module prevents accidental connection between the two adjacent photovoltaic power generation circuits, which could cause electrical breakdown or short circuits in the photovoltaic module. Optionally, the electrical spacing is greater than or equal to a preset distance.

[0083] In this embodiment, since the photovoltaic power generation circuits in the same photovoltaic module are independent of each other, each photovoltaic power generation circuit can be tested separately when the photovoltaic module is subjected to electroluminescence testing. This can significantly simplify the test process of electroluminescence testing of large-size photovoltaic modules, effectively ensure the quality and reliability of each photovoltaic power generation circuit, and ensure that the working performance of each photovoltaic power generation circuit is stable and reliable.

[0084] In an exemplary embodiment, the photovoltaic assembly is in a rectangular shape with a side length in the first direction being smaller than a side length in the second direction, and at least two photovoltaic power generation circuits are arranged in sequence along the second direction.

[0085] In this embodiment, since the photovoltaic module includes at least two photovoltaic power generation circuits, and the photovoltaic module is in the shape of a rectangle with a side length in the first direction being smaller than a side length in the second direction, at least two photovoltaic power generation circuits are arranged in sequence along the second direction. Thus, the photovoltaic module can have a higher height in the second direction to meet the photovoltaic power generation needs of building facades with a larger height. It is easy to understand that by rotating the photovoltaic module 90° clockwise or 90° counterclockwise (i.e., placing it horizontally), a photovoltaic module with a wider width can be obtained to meet the photovoltaic power generation needs of building facades with a larger width. Furthermore, the photovoltaic module provided in this embodiment can meet the photovoltaic power generation needs of building facades under different circumstances. That is to say, the photovoltaic module not only has a large size but also has a high application flexibility.

[0086] In an exemplary embodiment, each photovoltaic power generation circuit has the same number of cells in the first direction.

[0087] In the case where the first direction is a horizontal direction, each photovoltaic power generation circuit has the same number of cells in the first direction, which means that different rows of different photovoltaic power generation circuits along the first direction have the same number of cells.

[0088] Exemplarily, the cell matrix arrays in different photovoltaic power generation circuits in a photovoltaic module have the same number of cells in the first direction, which can also be understood as the cell matrix arrays in different photovoltaic power generation circuits having the same number of columns.

[0089] Optionally, when a photovoltaic component includes two photovoltaic power generation circuits, and the bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits correspond to different side lengths in the first direction of the photovoltaic component, in order to ensure that the number of cell panels in the first direction of each photovoltaic power generation circuit is the same, it is possible to ensure that the number of diodes in each first photovoltaic power generation circuit is the same when the photovoltaic component includes at least two first photovoltaic power generation circuits; it is also possible to ensure that the number of photovoltaic power generation circuits in each second photovoltaic power generation circuit is the same and the number of parallel-connected cell cell strings included in the photovoltaic power generation circuit is also the same when the photovoltaic component includes at least two second photovoltaic power generation circuits; it is also possible to ensure that the number of diodes in the first photovoltaic power generation circuit is the same as the number of photovoltaic power generation circuits in the second photovoltaic power generation circuit, and the number of cell cell strings included in each photovoltaic power generation circuit is 2 when the photovoltaic component includes at least one first photovoltaic power generation circuit and at least one second photovoltaic power generation circuit, and the bus bars of the two photovoltaic power generation circuits correspond to different side lengths in the first direction of the photovoltaic component.

[0090] Optionally, when the bus bars of each photovoltaic power generation circuit in the photovoltaic module correspond to the same side length in the second direction of the photovoltaic module, in order to make the number of cells in the first direction of each photovoltaic power generation circuit the same, it can be that when the photovoltaic module includes at least two first photovoltaic power generation circuits, the number of cells connected in parallel to each diode in each first photovoltaic power generation circuit is ensured to be the same; it can also be that when the photovoltaic module includes at least two second photovoltaic power generation circuits, the number of cells connected in series to each other included in each cell string in each second photovoltaic power generation circuit is ensured to be the same; it can also be that when the photovoltaic module includes at least one first photovoltaic power generation circuit and at least one second photovoltaic power generation circuit, the number of cells connected in parallel to each diode in each first photovoltaic power generation circuit is ensured to be the same as the number of cells connected in series to each cell string in each second photovoltaic power generation circuit.

[0091] In this embodiment, each photovoltaic power generation circuit in the photovoltaic module has the same number of cells in the first direction. Therefore, the lengths of at least two photovoltaic power generation circuits in the photovoltaic module in the first direction have a high degree of consistency, which is conducive to improving the ease of operation of setting at least two photovoltaic power generation circuits in the same photovoltaic module, and is conducive to further improving the application flexibility of the photovoltaic module.

[0092] In an exemplary embodiment, the photovoltaic assembly includes two photovoltaic power generation circuits, and bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits correspond to different side lengths of the photovoltaic assembly in the first direction.

[0093] The busbars between the positive and negative terminals of the two photovoltaic power generation circuits correspond to different side lengths of the photovoltaic module in the first direction, which means that, in the same photovoltaic module, the busbars of one photovoltaic power generation circuit correspond to one side length of the photovoltaic module in the first direction, and the busbars of the other photovoltaic power generation circuit correspond to the other side length of the photovoltaic module in the first direction. This can also be understood as the directions of the busbars of the two photovoltaic power generation circuits both correspond to the side lengths of the photovoltaic module in the first direction, and the busbars of the two photovoltaic power generation circuits are respectively close to different side lengths of the photovoltaic module in the first direction.

[0094] In this embodiment, the bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits correspond to different side lengths in the first direction of the photovoltaic component. Thus, when the side length in the first direction is smaller than the side length in the second direction, the photovoltaic component in this embodiment is a photovoltaic component with wires output from the short side. The short side output can reduce the space occupied by the photovoltaic component in the second direction, i.e., the long side direction. Based on this, the photovoltaic component provided in this embodiment can be applied to scenarios where it needs to be closely arranged with other photovoltaic components in the long side direction. Furthermore, it is convenient to layout and connect the photovoltaic components in a limited installation area, thereby improving the application flexibility of the photovoltaic components.

[0095] In an exemplary embodiment, the photovoltaic component is in a rectangular shape with a side length in the first direction being smaller than the side length in the second direction, the photovoltaic component includes two photovoltaic power generation circuits arranged in sequence along the second direction, each photovoltaic power generation circuit has the same number of cells in the first direction, and the bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits correspond to different side lengths in the first direction of the photovoltaic component, respectively. The positive terminal of one photovoltaic power generation circuit is connected to the negative terminal of the other photovoltaic power generation circuit, the negative terminal of one photovoltaic power generation circuit is connected to the positive pole of the external circuit, and the positive terminal of the other photovoltaic power generation circuit is connected to the negative pole of the external circuit.

[0096] The external circuit corresponding to the positive electrode connected to the negative terminal of one photovoltaic power generation circuit and the external circuit corresponding to the negative electrode connected to the positive terminal of another photovoltaic power generation circuit may be the same external circuit or different external circuits.

[0097] In an exemplary embodiment, the photovoltaic component is in a rectangular shape with a side length in the first direction being smaller than the side length in the second direction, the photovoltaic component includes two photovoltaic power generation circuits arranged in sequence along the second direction, each photovoltaic power generation circuit has the same number of cells in the first direction, and the bus bars between the positive terminal and the negative terminal of the two photovoltaic power generation circuits correspond to different side lengths in the first direction of the photovoltaic component, respectively. The positive terminals of the two photovoltaic power generation circuits are connected to each other and then to the negative pole of the external circuit, and the negative terminals of the two photovoltaic power generation circuits are connected to each other and then to the positive pole of the external circuit.

[0098] In an exemplary embodiment, there is no connection relationship between the photovoltaic power generation circuits in the photovoltaic assembly.

[0099] There is no connection relationship between the photovoltaic power generation circuits, that is, no connection relationship is formed inside the photovoltaic module, but each photovoltaic power generation circuit forms a connection relationship with a different external circuit.

[0100] Alternatively, in the absence of a connection between the photovoltaic power generation circuits in a photovoltaic assembly, the positive terminal of each photovoltaic power generation circuit in a photovoltaic assembly can be connected to the negative terminal of a photovoltaic power generation circuit in an adjacent photovoltaic assembly, and the negative terminal of each photovoltaic power generation circuit in that photovoltaic assembly can be connected to the positive terminal of a photovoltaic power generation circuit in another adjacent photovoltaic assembly. For easy understanding, one adjacent photovoltaic assembly and another adjacent photovoltaic assembly are located on either side of the photovoltaic assembly, respectively. Furthermore, optionally, among the multiple photovoltaic assemblies that are electrically connected, each photovoltaic assembly can be the same or different.

[0101] In an exemplary embodiment, Figure 3A As shown, the photovoltaic component is a rectangular shape with a side length in the first direction being smaller than a side length in the second direction. The photovoltaic component includes two identical first photovoltaic power generation circuits 10. The two first photovoltaic power generation circuits 10 are arranged in sequence along the second direction, and the two first photovoltaic power generation circuits 10 are symmetrically arranged with respect to the center point. The bus bar between the positive terminal and the negative terminal of one first photovoltaic power generation circuit 10 corresponds to one side length in the first direction of the photovoltaic component, and the bus bar of the other first photovoltaic power generation circuit 10 corresponds to the other side length in the first direction of the photovoltaic component.

[0102] Among them, the two first photovoltaic power generation circuits 10 are arranged in sequence along the second direction, and the two first photovoltaic power generation circuits 10 are symmetrically arranged with respect to the center point, which means that in the second direction, the previous first photovoltaic power generation circuit 10 can overlap with the next first photovoltaic power generation circuit 10 after rotating 180°.

[0103] In an exemplary embodiment, Figure 3B The embodiments of this application provide Figure 3A The corresponding schematic diagram of the photovoltaic module, combined with Figure 1 as well as Figure 3B It can be seen that the positive terminal 12 of one first photovoltaic power generation circuit 10 is connected to the negative terminal 14 in another first photovoltaic power generation circuit 10, and the negative terminal 14 is connected to the positive pole of the external circuit; the positive terminal 12 of the other first photovoltaic power generation circuit 10 is connected to the negative pole of the external circuit.

[0104] In an exemplary embodiment, Figure 3C The embodiments of this application provide Figure 3A The corresponding schematic diagram of the photovoltaic module, combined with Figure 1 as well as Figure 3C It can be seen that the positive terminals 12 of the two first photovoltaic power generation circuits 10 are connected to each other and then to the negative pole of the external circuit, and the negative terminals 14 of the two first photovoltaic power generation circuits 10 are connected to each other and then to the positive pole of the external circuit.

[0105] Optionally, when the two first photovoltaic power generation circuits 10 are arranged sequentially along the second direction and are symmetrically arranged about the center point between the two first photovoltaic power generation circuits 10, and the number of diodes in the two first photovoltaic power generation circuits 10 is the same, in order to make the operating current and the operating voltage of the two first photovoltaic power generation circuits 10 the same, the number of battery cells in the two first photovoltaic power generation circuits 10 should be the same; conversely, in order to make the current of the two first photovoltaic power generation circuits 10 the same but the voltage different, the number of battery cells in the two first photovoltaic power generation circuits 10 can be different.

[0106] In an exemplary embodiment, there is a first photovoltaic power generation circuit 10' having the same type and number of electrical components. When the busbars are all placed upward along the second direction, the first photovoltaic power generation circuit 10' and the first photovoltaic power generation circuit 10 are in a mirror-symmetric relationship along the symmetry axis of the second direction. Figure 1 as well as Figure 3DIt can be seen that the photovoltaic component is a rectangular shape with a side length in the first direction being smaller than the side length in the second direction. The photovoltaic component includes two first photovoltaic power generation circuits 10 and a first photovoltaic power generation circuit 10' that are mirror-symmetrical in the second direction. The first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' are arranged in sequence along the second direction. The bus bar between the positive terminal 12 and the negative terminal 14 of the first photovoltaic power generation circuit corresponds to one side length in the first direction of the photovoltaic component, and the bus bar of the first photovoltaic power generation circuit 10' corresponds to the other side length in the first direction of the photovoltaic component. The positive terminals 12 of the first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' are connected to each other and then to the negative pole of the external circuit. The negative terminals 14 of the first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' are connected to each other and then to the positive pole of the external circuit.

[0107] It should be noted that due to Figure 3D The first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' are shown to be mirror-symmetrical in the second direction, with the busbars positioned upward in the second direction. Therefore, in the photovoltaic assembly provided in this embodiment, the first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' are not arranged in a centrally symmetrical relationship. Furthermore, the first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' are two different circuit types of the first photovoltaic power generation circuit. As can be easily understood, the first photovoltaic power generation circuit 10 and the first photovoltaic power generation circuit 10' maintain consistent electrical performance and functionality.

[0108] Easy to understand, Figure 3C and Figure 3D By comparison, it can be seen that when the photovoltaic component is in the shape of a rectangle with a side length in the first direction being smaller than a side length in the second direction, and the two first photovoltaic power generation circuits in the photovoltaic component are connected in parallel, if the photovoltaic component includes two first photovoltaic power generation circuits that are mirror-symmetrical in the second direction when the bus bars are both placed upward along the second direction, it is more conducive to shortening the length of the connecting cable between the two first photovoltaic power generation circuits in the same photovoltaic component.

[0109] In an exemplary embodiment, in combination Figure 1 as well as Figure 3E It can be seen that when the bus bars between the positive terminal 12 and the negative terminal 14 of the two first photovoltaic power generation circuits 10 correspond to different side lengths in the first direction of the photovoltaic component, the number of cells connected in parallel with the diodes 16 in different first photovoltaic power generation circuits 10 is different.

[0110] The numbers of cells connected in parallel to the diodes in different first photovoltaic power generation circuits 10 are different, and thus the numbers of cells in the two first photovoltaic power generation circuits 10 are also different.

[0111] For example, Figure 3E As shown, the number of cells connected in parallel with diodes in one first photovoltaic power generation circuit 10 is 24, and the number of cells connected in parallel with diodes in another first photovoltaic power generation circuit 10 is 18. Since the number of diodes in the two first photovoltaic power generation circuits 10 is the same, the number of cells in the two first photovoltaic power generation circuits 10 is different.

[0112] In this embodiment, when the two first photovoltaic power generation circuits have the same number of diodes and different numbers of cells connected in parallel with the diodes, since multiple cells form a series relationship in the first photovoltaic power generation circuit, the total resistance of the first photovoltaic power generation circuit with a larger number of cells is larger, while the total resistance of the other first photovoltaic power generation circuit with a smaller number of cells is smaller. Therefore, the operating currents of the two first photovoltaic power generation circuits in the working state are the same but the operating voltages are different.

[0113] In an exemplary embodiment, Figure 4A As shown, the photovoltaic component is a rectangular shape with a side length in the first direction being smaller than a side length in the second direction. The photovoltaic component includes a first photovoltaic power generation circuit 10 and a second photovoltaic power generation circuit 20. The first photovoltaic power generation circuit and the second photovoltaic power generation circuit 20 are arranged in sequence along the second direction. The bus bar between the positive terminal and the negative terminal of the first photovoltaic power generation circuit corresponds to one side length in the first direction of the photovoltaic component, and the bus bar of the second photovoltaic power generation circuit 20 corresponds to the other side length in the first direction of the photovoltaic component.

[0114] In an exemplary embodiment, Figure 4B The embodiments of this application provide Figure 4A The corresponding schematic diagram of the photovoltaic module, combined with Figure 1 、 Figure 2 as well as Figure 4B It can be seen that the positive terminals 12 of the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 are connected to each other and then to the negative pole of the external circuit, and the negative terminals 14 of the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 are connected to each other and then to the positive pole of the external circuit.

[0115] In an exemplary embodiment, in combination Figure 1 、 Figure 2 As well as Figure 4C It can be seen that the number of cells connected in parallel to the diode 16 in the first photovoltaic power generation circuit 10 is different from the number of cells connected in series included in the cell string 24 in the second photovoltaic power generation circuit 20 .

[0116] For example, Figure 4CAs shown, the number of cells connected in parallel with diodes in the first photovoltaic power generation circuit 10 is 24, and the number of cells connected in series in the cell string in the second photovoltaic power generation circuit 20 is 12.

[0117] In an exemplary embodiment, the bus bars of each photovoltaic power generation circuit respectively correspond to the same side length of the photovoltaic assembly in the second direction.

[0118] Among them, the bus bars of each photovoltaic power generation circuit correspond to the same side length in the second direction of the photovoltaic component, which means that the bus bars of at least two photovoltaic power generation circuits in the same photovoltaic component are located on the same side of the photovoltaic component in the second direction, that is, the directions of the bus bars of the two photovoltaic power generation circuits are close to and correspond to the same side length in the second direction of the photovoltaic component.

[0119] In this embodiment, the bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits correspond to the same side length in the second direction of the photovoltaic component. Therefore, when the side length in the first direction is smaller than the side length in the second direction, the photovoltaic component in this embodiment is a photovoltaic component with wires extending from the long side. The long side wires extending can reduce the space occupied by the photovoltaic component in the second direction, i.e., the short side direction. Based on this, the present application can adjust the number of cells in each photovoltaic power generation circuit in the photovoltaic component, that is, by expanding the height of the cell matrix array in each photovoltaic power generation circuit in the photovoltaic component, so that the photovoltaic component also has a higher height accordingly. At the same time, since the photovoltaic component can include at least two photovoltaic power generation circuits, then by arranging multiple photovoltaic power generation circuits provided by this embodiment along the second direction, a photovoltaic component with a higher height (theoretically, by continuously stacking the photovoltaic power generation circuits in the height direction, an infinite height can be obtained) can be obtained by stacking the heights of multiple photovoltaic power generation circuits. Furthermore, it can meet the photovoltaic power generation needs of building facades of different heights, thereby improving the application flexibility of the photovoltaic component.

[0120] In an exemplary embodiment, when the photovoltaic module is in a rectangular shape with a side length in the first direction being smaller than a side length in the second direction, the photovoltaic module includes at least two photovoltaic power generation circuits arranged in sequence along the second direction, each photovoltaic power generation circuit has the same number of cells in the first direction, and the bus bars of each photovoltaic power generation circuit correspond to the same side length in the second direction of the photovoltaic module, the positive terminal of a photovoltaic power generation circuit located at one end of the photovoltaic module is connected to the negative pole of the external circuit, and the negative terminal of a photovoltaic power generation circuit located at the other end of the photovoltaic module is connected to the positive pole of the external circuit, and adjacent photovoltaic power generation circuits are connected in series with each other through the positive terminal and the negative terminal.

[0121] In an exemplary embodiment, the photovoltaic module is in a rectangular shape with a side length in the first direction being smaller than a side length in the second direction, the photovoltaic module includes at least two photovoltaic power generation circuits arranged in sequence along the second direction, each photovoltaic power generation circuit has the same number of cells in the first direction, and the bus bars of each photovoltaic power generation circuit correspond to the same side length in the second direction of the photovoltaic module. The positive terminals of each photovoltaic power generation circuit are connected to each other and then to the negative pole of the external circuit, and the negative terminals of each photovoltaic power generation circuit are connected to each other and then to the positive pole of the external circuit.

[0122] In an exemplary embodiment, Figure 5A As shown, the photovoltaic component is a rectangular shape with a side length in the first direction being smaller than a side length in the second direction. The photovoltaic component includes at least two identical first photovoltaic power generation circuits 10, and the at least two first photovoltaic power generation circuits are arranged in sequence along the second direction. The bus bars of each first photovoltaic power generation circuit 10 correspond to the same side length in the second direction of the photovoltaic component.

[0123] In an exemplary embodiment, Figure 5B The embodiments of this application provide Figure 5A The corresponding schematic diagram of the photovoltaic module, combined with Figure 1 as well as Figure 5B It can be seen that the positive terminal 12 of a first photovoltaic power generation circuit 10 located at one end of the photovoltaic component is connected to the negative pole of the external circuit, and the negative terminal 14 of a first photovoltaic power generation circuit 10 located at the other end of the photovoltaic component is connected to the positive pole of the external circuit, and adjacent first photovoltaic power generation circuits 10 are connected in series with each other through the positive terminal 12 and the negative terminal 14.

[0124] In an exemplary embodiment, Figure 5C The embodiments of this application provide Figure 5A The corresponding schematic diagram of the photovoltaic module, combined with Figure 1 as well as Figure 5C It can be seen that the positive terminals 12 of each first photovoltaic power generation circuit 10 are connected to each other and then to the negative pole of the external circuit, and the negative terminals 14 of each first photovoltaic power generation circuit 10 are connected to each other and then to the positive pole of the external circuit.

[0125] In an exemplary embodiment, in combination Figure 1 as well as Figure 5D It can be seen that when the busbars of each first photovoltaic power generation circuit 10 correspond to the same side length in the second direction of the photovoltaic assembly, the number of diodes in different first photovoltaic power generation circuits 10 is different.

[0126] For example, Figure 5DAs shown, the number of diodes in one first photovoltaic power generation circuit 10 is 4, the number of diodes in the other first photovoltaic power generation circuit 10 is 3, and the number of cells connected in parallel to each diode is 18. Based on this, the number of cells in the two first photovoltaic power generation circuits 10 is different.

[0127] In this embodiment, since the number of cell panels in the first direction of each first photovoltaic power generation circuit is the same, but the number of diodes in different first photovoltaic power generation circuits is different, the number of cell panels in each first photovoltaic power generation circuit is different, which leads to the total resistance of each first photovoltaic power generation circuit being different, and further, the operating current of each first photovoltaic power generation circuit is the same but the operating voltage is different.

[0128] In an exemplary embodiment, Figure 6A As shown, the photovoltaic component is a rectangular shape with a side length in the first direction being smaller than a side length in the second direction. The photovoltaic component includes a first photovoltaic power generation circuit 10 and a second photovoltaic power generation circuit 20. The first photovoltaic power generation circuit and the second photovoltaic power generation circuit 20 are arranged in sequence along the second direction. The bus bar of the first photovoltaic power generation circuit 10 and the bus bar of the second photovoltaic power generation circuit 20 respectively correspond to the same side length in the second direction of the photovoltaic component.

[0129] In an exemplary embodiment, Figure 6B The embodiments of this application provide Figure 6A The corresponding schematic diagram of the photovoltaic module, combined with Figure 1 、 Figure 2 as well as Figure 6B It can be seen that the positive terminal 12 of the first photovoltaic power generation circuit 10 and the positive terminal 12 of the second photovoltaic power generation circuit 20 are connected to each other and then connected to the negative pole of the external circuit, and the negative terminal 14 of the first photovoltaic power generation circuit and the negative terminal 14 of the second photovoltaic power generation circuit 20 are connected to each other and then connected to the positive pole of the external circuit.

[0130] In an exemplary embodiment, in combination Figure 1 、 Figure 2 as well as Figure 6C It can be seen that when the bus bar of the first photovoltaic power generation circuit 10 and the bus bar of the second photovoltaic power generation circuit 20 respectively correspond to the same side length in the second direction of the photovoltaic component, the number of cells connected in parallel with each diode 16 in the first photovoltaic power generation circuit 10 is different from the number of cells connected in series included in the cell string 24 in the second photovoltaic power generation circuit 20.

[0131] For example, Figure 6C As shown, the number of cells connected in parallel to the diodes in the first photovoltaic power generation circuit 10 is 18, and the number of cells connected in series in the cell string in the second photovoltaic power generation circuit 20 is 9.

[0132] It is easy to understand that when a photovoltaic component includes at least one first photovoltaic power generation circuit 10 and at least one second photovoltaic power generation circuit 20, since the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 respectively correspond to different circuit connection relationships, even if the operating voltages of the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 are the same, the operating current of the first photovoltaic power generation circuit 10 is different from the operating current of the second photovoltaic power generation circuit 20. Therefore, in the same photovoltaic component, the first photovoltaic power generation circuit 10 and the second photovoltaic power generation circuit 20 cannot form a series relationship.

[0133] In an exemplary embodiment, the operating voltages of the photovoltaic power generation circuits are the same, or the operating currents of the photovoltaic power generation circuits are the same.

[0134] Among them, in the same photovoltaic component, the working voltage and working current of each photovoltaic power generation circuit can be the same, the working voltage of each photovoltaic power generation circuit can be the same but the working current is different, or the working voltage of each photovoltaic power generation circuit can be different but the working current is the same.

[0135] The operating voltage and current of the photovoltaic power generation circuit correspond to the standard test conditions (STC) of the photovoltaic power generation circuit. The standard test conditions of the photovoltaic power generation circuit are test conditions used to evaluate the performance of the solar cell 18 in the photovoltaic power generation circuit. Optionally, the standard test conditions are: the cell temperature is 25°C, the irradiance is 1000W / m 2 , the atmospheric mass is 1.5 (AM1.5) spectrum.

[0136] It is easy to understand that the operating voltages and operating currents of the photovoltaic power generation circuits may be different.

[0137] Optionally, when the at least two photovoltaic power generation circuits included in the photovoltaic component are at least two first photovoltaic power generation circuits, the operating current of each photovoltaic power generation circuit in the photovoltaic component is the same. Further, if the number of cells in each first photovoltaic power generation circuit is the same, then in this case, the operating current and the operating voltage of each photovoltaic power generation circuit in the photovoltaic component are the same; or, when the at least two photovoltaic power generation circuits included in the photovoltaic component are at least two second photovoltaic power generation circuits, and each second photovoltaic power generation circuit is exactly the same, then in this case, the operating current and the operating voltage of each photovoltaic power generation circuit in the photovoltaic component are the same.

[0138] In this embodiment, since each photovoltaic power generation circuit can operate under the same electrical parameters or different electrical parameters, the photovoltaic module including at least two photovoltaic power generation circuits can have flexible application methods and connection methods, which significantly improves the application flexibility of the photovoltaic module.

[0139] In an exemplary embodiment, when the photovoltaic assembly includes at least two first photovoltaic power generation circuits and the number of cells in each first photovoltaic power generation circuit is the same, the operating voltage and the operating current of each first photovoltaic power generation circuit are the same.

[0140] Among them, when at least two photovoltaic power generation circuits included in the photovoltaic component are both first photovoltaic power generation circuits, it is easy to understand based on the circuit connection situation of the first photovoltaic power generation circuit that when the first photovoltaic power generation circuit is in a normal working state, the multiple battery cells in the first photovoltaic power generation circuit are in a series relationship, and the resistance of the battery cells in different first photovoltaic power generation circuits is the same. Therefore, when the number of battery cells in each first photovoltaic power generation circuit is the same, the total resistance of each first photovoltaic power generation circuit is the same, and thus, the operating voltage and operating current of each first photovoltaic power generation circuit are the same.

[0141] It is easy to understand that when the photovoltaic module includes at least two first photovoltaic power generation circuits and the number of cells in each first photovoltaic power generation circuit is the same, the operating current and the operating voltage of each first photovoltaic power generation circuit in the photovoltaic module can be the same. Based on this, the first photovoltaic power generation circuits in the photovoltaic module can be connected in series or in parallel. Therefore, when the operating current and the operating voltage of each first photovoltaic power generation circuit are the same, the flexibility of the circuit connection relationship of each first photovoltaic power generation circuit in the photovoltaic module can be improved, thereby further improving the application flexibility of the photovoltaic module.

[0142] In an exemplary embodiment, when the photovoltaic assembly includes a first photovoltaic power generation circuit and a second photovoltaic power generation circuit, the photovoltaic power generation circuit in the second photovoltaic power generation circuit includes two parallel-connected cell strings, and the number of cell strings in the second photovoltaic power generation circuit is twice the number of cell strings in the first photovoltaic power generation circuit, the operating voltages of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit are the same but the operating currents are different.

[0143] Among them, when the photovoltaic component includes a first photovoltaic power generation circuit and a second photovoltaic power generation circuit, it is easy to understand based on the circuit connection status of the first photovoltaic power generation circuit and the circuit connection status of the second photovoltaic power generation circuit that the multiple battery cells in the first photovoltaic power generation circuit are in a series relationship, while in the second photovoltaic power generation circuit, the multiple battery strings in the photovoltaic power generation circuit are connected in parallel on the bus bar, and the multiple photovoltaic power generation circuits are in a series relationship. Then, when the resistance of the battery cells in the two photovoltaic power generation circuits is the same and the number of battery cells in each photovoltaic power generation circuit in the first direction is the same, the number of battery cells in the second photovoltaic power generation circuit is twice the number of battery cells in the first photovoltaic power generation circuit, which indicates that the total resistance of the two photovoltaic power generation circuits is the same. Therefore, the operating voltages of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit are the same. However, due to the different circuit connection relationships of the two photovoltaic power generation circuits, the operating currents of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit are different.

[0144] For example, Figure 4A As shown, the photovoltaic component includes a first photovoltaic power generation circuit 10 and a second photovoltaic power generation circuit 20. When the first photovoltaic power generation circuit includes two diodes, and each diode is connected in parallel with 12 series-connected solar cells, the total resistance of the first photovoltaic power generation circuit is the sum of the resistances of the 24 solar cells; when the second photovoltaic power generation circuit includes two photovoltaic power generation circuits and one diode, and each photovoltaic power generation circuit includes two parallel-connected solar cell strings, and each solar cell string includes 12 solar cells, the total resistance of the photovoltaic power generation circuit can be equivalent to the sum of the resistances of the 12 solar cells. Therefore, the total resistance of the second photovoltaic power generation circuit is the sum of the resistances of 2*12=24 solar cells. That is to say, in this case, the total resistance of the first photovoltaic power generation circuit is the same as the total resistance of the second photovoltaic power generation circuit. Furthermore, the operating voltages of the two photovoltaic power generation circuits in the working state are the same. However, since the first photovoltaic power generation circuit and the second photovoltaic power generation circuit have different solar cell 18 connection relationships, the operating currents of the two photovoltaic power generation circuits in the working state are different.

[0145] It should be noted that the number of diodes, number of cells, number of cell strings, etc. listed in this exemplary embodiment in order to make the total resistance of the two photovoltaic power generation circuits the same are merely examples. In specific implementations, in order to make the total resistance of the two photovoltaic power generation circuits the same so that they can operate under working conditions with different currents but the same voltage, other embodiments can also be used to implement it. As long as the equivalent resistance of the two photovoltaic power generation circuits can be made the same based on the circuit connection principle, this application does not limit the cell connection relationship of each photovoltaic power generation circuit.

[0146] For example, Figure 6CAs shown, when the first photovoltaic power generation circuit includes 4 diodes, and each diode is respectively connected in parallel with 18 series-connected solar cells, the total resistance of the first photovoltaic power generation circuit is the sum of the resistances of 72 solar cells; when the second photovoltaic power generation circuit includes 4 photovoltaic power generation circuits, and each photovoltaic power generation circuit includes 2 parallel-connected solar cell strings, and each solar cell string includes 9 solar cells 18, the total resistance of the photovoltaic power generation circuit can be equivalent to the sum of the resistances of 9 solar cells. Therefore, the total resistance of the second photovoltaic power generation circuit is the sum of the resistances of 4*9=36 solar cells 18. That is to say, in this case, the total resistance of the first photovoltaic power generation circuit is different from the total resistance of the second photovoltaic power generation circuit. At the same time, since the first photovoltaic power generation circuit and the second photovoltaic power generation circuit have different solar cell 18 connection relationships, the working current and working voltage of the two photovoltaic power generation circuits in working state are different.

[0147] It should be noted that the above Figure 3A 、 3B The photovoltaic components shown in 3C, 3D, 3E, 4A, 4B, 4C, 5A, 5B, 5C, 5D, 6A, 6B and 6C are merely exemplary embodiments for ease of understanding. Specifically, the photovoltaic components shown in the above pictures only illustrate two photovoltaic power generation circuits, but in a specific implementation, the photovoltaic component can also include a larger number of photovoltaic power generation circuits; at the same time, the photovoltaic component can also include at least two second photovoltaic power generation circuits 20. In short, the present application does not limit the specific structural style of the photovoltaic component.

[0148] Obviously, based on the different combinations and arrangements of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit, a variety of different photovoltaic modules can be combined. By adjusting the number of cells included in the first photovoltaic power generation circuit and the second photovoltaic power generation circuit, the total resistance of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit can be changed, and the photovoltaic modules with different operating state requirements can be further met. In other words, the photovoltaic module of this embodiment has a high degree of flexibility and adaptability to different photovoltaic power generation scenarios with different requirements.

[0149] It is easy to understand that by rotating the photovoltaic module in any of the above photovoltaic module embodiments 90° clockwise or 90° counterclockwise (i.e., placing it horizontally), the photovoltaic module can also be used in scenarios where the building facade has a larger width and limited height (for example, a low wall, a wide roof, etc.), thereby effectively utilizing the horizontal space to meet the photovoltaic power generation needs of the building facade with limited height.

[0150] It is easy to understand that since the bus bars of each photovoltaic power generation circuit included in the photovoltaic assembly in any of the above-mentioned photovoltaic assembly embodiments are close to a certain side length of the photovoltaic assembly in a certain direction, the photovoltaic assembly provided in this embodiment is based on a specific installation method, which can make it easier to grasp the bus bar of the photovoltaic power generation circuit when disassembling and maintaining the photovoltaic assembly or any photovoltaic power generation circuit. The long side of the photovoltaic assembly makes maintenance work more convenient.

[0151] It is easy to understand that by adjusting the size of the cells, the number of cells and the spacing between the cells in the photovoltaic module in any of the above-mentioned photovoltaic module embodiments, photovoltaic power generation circuits of different sizes can be formed to form photovoltaic modules of different sizes. Thereby, the photovoltaic module can reach a higher height. Similarly, after placing the photovoltaic module horizontally, it can also reach a wider width, thereby meeting the photovoltaic power generation needs of large-sized facades of different types of buildings.

[0152] It is easy to understand that the photovoltaic components in any of the above-mentioned photovoltaic component embodiments, based on their respective specific installation methods, can ensure that the cables used to connect the photovoltaic components are located at the edges of the photovoltaic components and the cable routing paths are short, which can better conceal the cables and junction boxes, thereby improving the aesthetics of the photovoltaic components by reducing the visibility of the cables and junction boxes.

[0153] In an exemplary embodiment, a photovoltaic power generation system is further provided, which includes a photovoltaic module as described in any of the above photovoltaic module embodiments.

[0154] The photovoltaic power generation system may include at least one photovoltaic module. When the photovoltaic power generation system includes at least two photovoltaic modules, the at least two photovoltaic modules may be at least two identical photovoltaic modules or at least two different photovoltaic modules.

[0155] It can be understood that the same, similar or corresponding contents in different embodiments can be referenced to each other.

[0156] It is understandable that the above-mentioned photovoltaic components can also adopt other forms, not limited to the forms mentioned in the above embodiments, as long as they can achieve a larger size to meet the photovoltaic power generation needs of large-sized building facades.

[0157] In the description of this specification, reference to the terms "some embodiments" or "other embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0158] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0159] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A photovoltaic module, characterized in that: The photovoltaic assembly includes at least two photovoltaic power generation circuits, and the at least two photovoltaic power generation circuits include at least one of a first photovoltaic power generation circuit and a second photovoltaic power generation circuit; the photovoltaic power generation circuit includes a positive terminal, a negative terminal, at least one diode, and a plurality of solar cells, the negative terminal is used to connect to the positive electrode of an external circuit, the positive terminal is used to connect to the negative electrode of an external circuit, and the plurality of solar cells in each photovoltaic power generation circuit are arranged in the form of a solar cell matrix array; In the first photovoltaic power generation circuit, the diodes are sequentially connected in series along one direction between the positive terminal and the negative terminal, the cathode of one diode is connected to the positive terminal, and the anode of one diode is connected to the negative terminal; each diode is respectively connected in parallel with at least one solar cell connected in series, and the number of solar cells connected in parallel to each diode is the same; In the second photovoltaic power generation circuit, M photovoltaic power generation circuits and (M-1) diodes are included; the photovoltaic power generation circuit includes N parallel-connected battery cell strings, the M photovoltaic power generation circuits are connected in series, each battery cell string includes at least one battery cell connected in series, two adjacent photovoltaic power generation circuits are connected in parallel with a diode, the negative pole of one diode is connected to the positive terminal, and the positive pole of one diode is connected to the negative terminal.

2. The photovoltaic module according to claim 1, characterized in that At least two photovoltaic power generation circuits are arranged along one direction and the photovoltaic power generation circuits are independent of each other.

3. The photovoltaic module according to claim 2, characterized in that The photovoltaic assembly is in a rectangular shape with a side length in the first direction being smaller than a side length in the second direction, and at least two photovoltaic power generation circuits are arranged in sequence along the second direction.

4. The photovoltaic module according to claim 3, characterized in that Each photovoltaic power generation circuit has the same number of cells in the first direction.

5. The photovoltaic module according to claim 4, characterized in that: The photovoltaic assembly includes two photovoltaic power generation circuits, and bus bars between the positive terminals and the negative terminals of the two photovoltaic power generation circuits respectively correspond to different side lengths of the photovoltaic assembly in the first direction.

6. The photovoltaic module according to claim 4, characterized in that: The busbars of each photovoltaic power generation circuit respectively correspond to the same side length of the photovoltaic assembly in the second direction.

7. The photovoltaic module according to claim 4, characterized in that: The operating voltages of the photovoltaic power generation circuits are the same, or the operating currents of the photovoltaic power generation circuits are the same.

8. The photovoltaic module according to claim 7, characterized in that: When the photovoltaic assembly includes at least two first photovoltaic power generation circuits and the number of cells in each of the first photovoltaic power generation circuits is the same, the operating voltage and the operating current of each of the first photovoltaic power generation circuits are the same.

9. The photovoltaic module according to claim 7, characterized in that: When the photovoltaic component includes the first photovoltaic power generation circuit and the second photovoltaic power generation circuit, the photovoltaic power generation circuit in the second photovoltaic power generation circuit includes two parallel-connected cell strings, and the number of cell strings in the second photovoltaic power generation circuit is twice the number of cell strings in the first photovoltaic power generation circuit, the operating voltages of the first photovoltaic power generation circuit and the second photovoltaic power generation circuit are the same but the operating currents are different.

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

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