Photovoltaic module and photovoltaic system

Abstract

The utility model relates to the field of photovoltaic technology, and discloses a photovoltaic assembly and a photovoltaic system. The photovoltaic module comprises a module main body and an optimizer structure. The module main body comprises a battery piece layer and packaging structures located on the two sides of the battery piece layer. The module main body forms an effective power generation area and a blank area surrounding the effective power generation area, and the effective power generation area corresponds to the battery piece layer; the optimizer structure comprises an optimizer body located in the blank area and a connecting cable laid along the blank area. The photovoltaic module can be an intelligent double-sided double-glass photovoltaic module, the optimizer main body is arranged in the blank area outside the effective power generation area, the connecting cable is laid along the narrow blank area, the installation mode of the optimizer structure is optimized and designed, the effective power generation area corresponding to the battery piece layer is prevented from being shielded on the back, and the power generation efficiency is improved. Therefore, the double-sided rate of the photovoltaic module is ensured, the power generation efficiency is improved, and the tidiness and attractiveness of the module can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic component and a photovoltaic system. Background Art

[0002] Photovoltaic modules are the smallest effective power generation units in photovoltaic power stations and play a key role in photoelectric conversion. With the continuous development of photovoltaic technology, the power level of photovoltaic modules has developed rapidly in recent years. However, due to the presence of complex environmental factors such as obstructions, shade, dust, etc., photovoltaic modules are usually accompanied by serious power losses during the actual power generation process, resulting in a decrease in the overall power generation of the photovoltaic system. Smart photovoltaic modules track the maximum power point (MPPT) of each independent photovoltaic module in the photovoltaic system by adding a power optimizer to the traditional module structure, maximizing the power generation of each module, thereby optimizing and improving the overall power generation of the photovoltaic system.

[0003] In the related art, the power optimizer is usually installed at a random position on the back surface of the module, the input cable is connected to the positive and negative junction boxes of the module respectively, and the output cable is connected to the external circuit. For photovoltaic modules, especially high-power double-sided double-glass modules, the orthographic projection of the back power optimizer body and the connecting cables is mostly covered in the battery area, which will block the effective power generation area on the back of the module, affect the overall bifaciality of the module, and thus cause power loss of the module. Utility Model Content

[0004] In view of this, the utility model provides a photovoltaic module and a photovoltaic system to solve the problem that the power optimizer and the connecting cables block the effective power generation area of ​​the photovoltaic module and affect the bifaciality of the double-sided double-glass smart module.

[0005] In the first aspect, the utility model provides a photovoltaic module, including: a module body and an optimizer structure, the module body including a battery cell layer and a packaging structure located on both sides of the battery cell layer; the module body forms an effective power generation area and a blank area surrounding the effective power generation area, and the effective power generation area corresponds to the battery cell layer; the optimizer structure includes an optimizer body and a connecting cable, the optimizer body is located in the blank area, and the connecting cable is laid along the blank area.

[0006] Beneficial effects: The photovoltaic module can be set as an intelligent double-sided double-glass photovoltaic module, the optimizer body is set in a blank area outside the effective power generation area, and the connecting cables are laid along the narrow blank area. The installation method of the optimizer structure is optimized to avoid blocking the effective power generation area corresponding to the battery layer on the back, thereby ensuring the double-sidedness of the photovoltaic module, improving the power generation efficiency, and also improving the neatness and aesthetics of the module.

[0007] In an optional embodiment, the blank area includes a middle area and an edge area; the middle area divides the battery layer into two parts in the length direction, and the edge area is formed at the edges of the battery layer.

[0008] In an optional embodiment, the connecting cable includes a first input cable and a second input cable, the first input cable and the second input cable are respectively arranged on both sides of the optimizer body, one end of the first input cable and the second input cable are electrically connected to the optimizer body, and the other end is extended along the edge area.

[0009] In the utility model, the method of winding the input cable in the narrow edge area can completely avoid blocking the effective power generation area and prevent hot spots from affecting the power generation efficiency. It can also avoid damage to the cable due to the external environment and increase the service life.

[0010] In an optional embodiment, it further includes: a junction box, which is arranged in the middle area; and a first input cable and a second input cable of the optimizer structure are connected to output terminals of the junction box.

[0011] In an optional embodiment, the connecting cable further includes a first output cable and a second output cable, the first output cable and the second output cable are respectively arranged on both sides of the optimizer body, and one end of the first output cable is electrically connected to the optimizer body, and the other end is suitable for connecting to an external circuit;

[0012] The first input cable and the first output cable are arranged on the same side, and the second input cable and the second output cable are arranged on the same side.

[0013] In the utility model, the first output cable and the first input cable are arranged on the left side of the optimizer body, and the second output cable and the second input cable are arranged on the right side of the optimizer body, which is convenient for installation and identification and convenient for connection. The optimizer body can track and analyze the maximum power point of the photovoltaic assembly generated from the first input cable and the second input cable and perform optimization control, so that each independent intelligent photovoltaic assembly can output the maximum power generation from the first output cable and the second output cable to the power station system circuit.

[0014] In an optional embodiment, the component body is a rectangular structure, and the optimizer body is configured as a long strip structure and is fixed in an edge region on one side of the component body.

[0015] In an optional implementation, the length-to-width ratio of the elongated strip structure is in the range of 3-10.

[0016] In an optional embodiment, the component body is a rectangular structure, the optimizer body is configured as a right-angled triangle structure, and is fixed in the edge area of ​​one corner of the component body, and the two right-angled sides of the right-angled triangle structure are respectively parallel to a group of adjacent long sides and short sides of the component body.

[0017] In the utility model, the optimizer body is designed as a right-angled triangle structure arranged at the inner corner position of the rectangular component body, which can maximize the use of the blank edge area, avoid occlusion and have higher stability.

[0018] In an optional embodiment, it further comprises: a frame structure, which is arranged around the component body and fixed to the edge area; the optimizer body is installed in the gap between the frame structure and the component body;

[0019] The height of the optimizer body is smaller than the gap height between the component body and the frame structure, and the height range of the optimizer body is 10mm-30mm.

[0020] In the utility model, the connecting cables and the optimizer body are both placed under the frame structure, especially the connecting cables are completely hidden under the frame structure, avoiding obstruction while also being aesthetically pleasing; the height of the optimizer body is lower than the gap height to facilitate the installation of the optimizer body, so as to maximize the use of the blank edge area, while effectively avoiding damage and heat accumulation.

[0021] In a second aspect, the utility model further provides a photovoltaic system, comprising: a plurality of the above-mentioned photovoltaic modules, wherein the plurality of photovoltaic modules are interconnected via output cables of an optimizer structure.

[0022] Beneficial effects: Multiple photovoltaic modules are arranged in arrays to form a photovoltaic system, which is ultimately connected to the power station system circuit of the photovoltaic system. The optimizer structure does not block the effective power generation area on the back, while ensuring that each module operates at the maximum power point, thus achieving efficient photoelectric conversion and power distribution of the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of a photovoltaic module according to an embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the optimizer structure of an embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the first installation of the optimizer structure of the embodiment of the utility model;

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

[0028] Figure 5 It is another structural schematic diagram of the optimizer structure of an embodiment of the utility model;

[0029] Figure 6 It is another installation schematic diagram of the optimizer structure of an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 1. Component body; 2. Frame structure; 3. Junction box; 4. Optimizer body; 51. First input cable; 52. Second input cable; 61. First output cable; 62. Second output cable. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understandable that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only some structures related to the utility model are shown in the accompanying drawings, not all structures. In the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model. Various structural schematic diagrams according to embodiments of the utility model are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified for the purpose of clear expression, and some details may be omitted. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships between them are only exemplary, and may be deviated due to manufacturing tolerances or technical limitations in practice, and those skilled in the art may design regions / layers with different shapes, sizes, and relative positions according to actual needs. In the context of the utility model, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element, or there may be an intermediate layer / element between them. In addition, if one layer / element is "on" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0033] The present embodiment provides a photovoltaic module, including a module body 1 and an optimizer structure, the module body 1 includes a battery cell layer and a packaging structure located on both sides of the battery cell layer, the module body 1 forms an effective power generation area and a blank area surrounding the effective power generation area, and the effective power generation area corresponds to the battery cell layer; the optimizer structure includes an optimizer body 4 and connecting cables, the optimizer body 4 is located in the blank area, and the connecting cables are laid along the blank area.

[0034] Specifically, the component body 1 includes a battery layer composed of multiple battery strings, and a packaging structure respectively arranged on the front and back of the battery layer, the packaging structure includes a transparent packaging film and packaging glass, and the middle battery layer can absorb the incident sunlight on the front and back of the component to generate electricity; the photovoltaic component is provided with an optimizer structure, that is, the photovoltaic component of this embodiment is an intelligent double-sided double-glass photovoltaic component. Compared with the existing optimizer structure and the connecting cables across the top of the battery layer, this embodiment sets the optimizer body 4 in a blank area outside the effective power generation area, and lays the connecting cables along the narrow blank area, optimizes the design of the installation method of the optimizer structure, avoids blocking the effective power generation area corresponding to the battery layer on the back, thereby ensuring the double-sided rate of the photovoltaic component, improving the power generation efficiency, and also improving the neatness and beauty of the component.

[0035] In one embodiment, the blank area includes a middle area and an edge area; the middle area divides the battery layer into two parts in the length direction, and the edge area is formed at the edges of the battery layer.

[0036] After the area corresponding to the cell layer in the plane of the component body 1 is divided into the effective power generation area, the other areas in the plane of the component body 1 are blank areas; it can be known that the cell layer in the photovoltaic component is divided into two parts, the upper and lower parts, and the blank area in the middle realizes the convergence of the upper and lower parts of the cell; the edges of the entire component body 1 have narrow blank areas without cells, that is, edge areas. The plane area of ​​the component body 1 consists of the effective power generation area and the blank area.

[0037] In one embodiment, the connecting cable includes a first input cable 51 and a second input cable 52, which are respectively arranged on both sides of the optimizer body 4, and one end of the first input cable 51 and the second input cable 52 are electrically connected to the optimizer body 4, and the other end is extended along the edge area.

[0038] like Figure 1 As shown, the first input cable 51 is arranged on the left side of the optimizer body 4, and is wound counterclockwise along the edge area of ​​the short side of the component, passing through the edge area of ​​the long side until reaching the middle area, and the second input cable 52 is arranged on the right side of the optimizer body 4, and is wound clockwise along the edge area of ​​the short side of the component, passing through the edge area of ​​the long side until reaching the middle area. The above-mentioned winding method in the narrow edge area can completely avoid the cable from blocking the effective power generation area, avoid hot spots affecting the power generation efficiency, and also avoid damage to the cable by the external environment, thereby increasing the service life.

[0039] like Figure 1 and Figure 4As shown, the photovoltaic assembly of this embodiment further includes a junction box 3 , which is arranged in the middle area; the first input cable 51 and the second input cable 52 of the optimizer structure are connected to the output terminals of the junction box 3 .

[0040] A junction box 3 is provided in the middle area of ​​the component body 1, and the input cable wound to the middle area is connected to two input cables at both ends of the middle area, respectively, without blocking the battery sheet layer of the component body 1. Figure 1 and Figure 4 As shown, three junction boxes 3 are provided, wherein the junction boxes 3 on the left and right are directly connected to the input cables of the optimizer structure. The connection between the junction boxes 3 is well known to those skilled in the art and is not illustrated in the figure.

[0041] Furthermore, the connecting cables of this embodiment also include a first output cable 61 and a second output cable 62, which are respectively arranged on both sides of the optimizer body 4, and one end is electrically connected to the optimizer body 4, and the other end is suitable for connecting to an external circuit; the first input cable 51 and the first output cable 61 are arranged on the same side, and the second input cable 52 and the second output cable 62 are arranged on the same side.

[0042] That is, the first output cable 61 and the first input cable 51 are arranged on the left side of the optimizer body 4, and the second output cable 62 and the second input cable 52 are arranged on the right side of the optimizer body 4, which is convenient for installation and identification and convenient connection.

[0043] The optimizer body 4 contains a power control unit, which can track and analyze the maximum power point (MPPT) of the photovoltaic components from the first input cable 51 and the second input cable 52 and perform optimization control, so that each independent intelligent photovoltaic component can output the maximum power generation from the first output cable 61 and the second output cable 62 to the power station system circuit.

[0044] The component body 1 in this embodiment is a rectangular structure. As an optional embodiment, Figure 1 and Figure 2 As shown, the optimizer body 4 is configured as a long strip structure and is fixed in the edge region of one side of the component body 1. The length-to-width ratio of the long strip structure is designed to be in the range of 3-10, so that it can be arranged in the edge region accordingly. The specific length and width of the long strip structure are not limited, and are as small as possible under the premise of meeting the basic functional requirements of the optimizer, such as including a power control unit, so as to avoid blocking the battery layer.

[0045] As another optional implementation, Figure 4 and Figure 5As shown, the optimizer body 4 is set as a right-angled triangle structure and is fixed in the edge area of ​​one corner of the component body 1. The two right-angled sides of the triangle structure are respectively parallel to a group of adjacent long sides and short sides of the component body 1. The optimizer body 4 is designed as a right-angled triangle structure and is set at the inner corner position of the rectangular component body 1, which can maximize the use of the blank edge area, avoid occlusion and have higher stability.

[0046] In one embodiment, the photovoltaic module also includes a frame structure 2, which is arranged around the module body 1 and fixed in the edge area, and the optimizer body 4 is installed in the gap between the frame structure 2 and the module body 1; the height of the optimizer body 4 is less than the gap height between the module body 1 and the frame structure 2, and the height range of the optimizer body 4 is 10mm-30mm.

[0047] See also Figure 3 and Figure 6 After the component body 1 is embedded in the frame structure 2, there is a certain gap between the component body 1 and the frame structure 2. In this embodiment, the optimizer body 4 is installed in this gap. The optimizer body 4 is fixed to any position between the frame structure 2 and the photovoltaic component by bonding or mechanical connection. Specifically, it can be set on the frame structure 2 or on the packaging glass of the photovoltaic component. Correspondingly, the first input cable 51 and the second input cable 52 are also wound between the frame structure 2 and the component body 1, that is, the connecting cable and the optimizer body 4 are both placed under the frame structure 2, especially the connecting cable is completely hidden under the frame structure 2, avoiding obstruction while having aesthetics; the height of the optimizer body 4 is lower than the gap height, which is convenient for the installation of the optimizer body 4, so as to maximize the use of the blank edge area, and at the same time can effectively avoid damage and heat accumulation.

[0048] This embodiment further provides a photovoltaic system, comprising a plurality of the above-mentioned photovoltaic modules, wherein the plurality of photovoltaic modules are interconnected via output cables of an optimizer structure.

[0049] Multiple photovoltaic modules are arranged in arrays to form a photovoltaic system, which is ultimately connected to the power station system circuit of the photovoltaic system. The optimizer structure does not block the effective power generation area on the back, while ensuring that each module operates at the maximum power point, thereby achieving efficient photoelectric conversion and power distribution of the photovoltaic system as a whole.

[0050] In the above description, the technical details of the patterning and etching of each layer are not described in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of desired shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not completely the same as the methods described above. In addition, although the various embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage.

[0051] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A photovoltaic module, characterized in that: include: A component body (1), the component body (1) comprising a battery cell layer and a packaging structure located on both sides of the battery cell layer; the component body (1) forms an effective power generation area and a blank area surrounding the effective power generation area, the effective power generation area corresponds to the battery cell layer; An optimizer structure, the optimizer structure comprising an optimizer body (4) and a connecting cable, the optimizer body (4) is located in the blank area, and the connecting cable is laid along the blank area.

2. The photovoltaic module according to claim 1, characterized in that: The blank area includes a middle area and an edge area; the middle area divides the battery layer into two parts in the length direction, and the edge area is formed at the edge positions of the four sides of the battery layer.

3. The photovoltaic module according to claim 2, characterized in that: The connecting cable comprises a first input cable (51) and a second input cable (52), wherein the first input cable (51) and the second input cable (52) are respectively arranged on both sides of the optimizer body (4), and one end of the first input cable (51) and the second input cable (52) are electrically connected to the optimizer body (4), and the other end is extended along the edge area.

4. The photovoltaic module according to claim 3, characterized in that: Also includes: A junction box (3), the junction box (3) being arranged in the middle area; the first input cable (51) and the second input cable (52) of the optimizer structure are connected to output terminals of the junction box (3).

5. The photovoltaic module according to claim 4, characterized in that: The connecting cable further comprises a first output cable (61) and a second output cable (62), wherein the first output cable (61) and the second output cable (62) are respectively arranged on both sides of the optimizer body (4), and one end of the first output cable (61) and the second output cable (62) are electrically connected to the optimizer body (4), and the other end is suitable for connecting to an external circuit; The first input cable (51) and the first output cable (61) are arranged on the same side, and the second input cable (52) and the second output cable (62) are arranged on the same side.

6. The photovoltaic module according to claim 5, characterized in that: The component body (1) is a rectangular structure, and the optimizer body (4) is arranged as a long strip structure and is fixed in the edge region of one side of the component body (1).

7. The photovoltaic module according to claim 6, characterized in that: The length-to-width ratio of the long strip structure is in the range of 3-10.

8. The photovoltaic module according to claim 5, characterized in that: The component body (1) is a rectangular structure, the optimizer body (4) is configured as a right-angled triangle structure and is fixed in the edge region of one corner of the component body (1), and the two right-angled sides of the right-angled triangle structure are respectively parallel to a group of adjacent long sides and short sides of the component body (1).

9. The photovoltaic module according to any one of claims 2 to 8, characterized in that: Also includes: A frame structure (2), the frame structure (2) being arranged around the component body (1) and fixed to the edge region; The optimizer body (4) is installed in the gap between the frame structure (2) and the component body (1); The height of the optimizer body (4) is smaller than the gap height between the component body (1) and the frame structure (2), and the height of the optimizer body (4) ranges from 10 mm to 30 mm.

10. A photovoltaic system, characterized in that: include: A plurality of photovoltaic assemblies according to any one of claims 1 to 9, wherein the plurality of photovoltaic assemblies are interconnected via output cables of the optimizer structure.

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