Frame, photovoltaic module and photovoltaic system
By designing light guides on the frame of the photovoltaic module to transmit light to the back of the bifacial cell laminate, the problem of low power generation efficiency on the back of the bifacial photovoltaic module is solved, and a significant improvement in back-side power generation efficiency is achieved.
Patent Information
- Application Number
- CN202423290483.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The back side of bifacial photovoltaic modules has a lower power generation efficiency, accounting for only about 3% of the total power generation.
The design adopts a frame design, including a first frame and a light guide. The first light guide part of the light guide is located on the outside of the frame, and the second light guide part faces inward, which is used to conduct light to the back of the double-sided battery laminate to improve the power generation efficiency on the back.
By designing a light guide, light is effectively transmitted to the back of the bifacial cell laminate, significantly improving the back-side power generation efficiency of the bifacial photovoltaic module.
Smart Images
Figure CN223681023U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of photovoltaic, in particular to a frame, a photovoltaic module and a photovoltaic system. BACKGROUND
[0002] In order to maximize the power generation of the photovoltaic module, the double-sided photovoltaic module gradually becomes the mainstream, and the double-sided photovoltaic module includes a double-sided cell laminated piece capable of generating electricity on both the front and back surfaces.
[0003] Since the back surface of the double-sided cell laminated piece is always in a weak light condition, the power generation of the back surface of the double-sided cell laminated piece is only about 3% of the total power generation, and thus the power generation efficiency of the back surface of the double-sided photovoltaic module is low. CONTENT OF THE UTILITY MODEL
[0004] The utility model provides a frame, a photovoltaic module and a photovoltaic system, which can improve the power generation efficiency of the back surface of the double-sided photovoltaic module.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] In a first aspect, a frame is provided for carrying a cell laminated piece, which includes: a first frame body for carrying a double-sided cell laminated piece; a light guide pipe including a first light guide part and a second light guide part, the first light guide part being arranged on the outer side of the first frame body, and the second light guide part being connected with the first light guide part and arranged on the bottom side of the first frame body, facing the inner side of the first frame body.
[0007] Since the first light guide part of the light guide pipe is arranged on the outer side of the first frame body of the frame, the second light guide part of the light guide pipe is connected with the first light guide part and arranged on the bottom side of the first frame body, facing the inner side of the first frame body, when the first frame body carries the double-sided cell laminated piece, the light can be transmitted to the back surface of the double-sided cell laminated piece, thereby improving the power generation efficiency of the back surface of the double-sided photovoltaic module.
[0008] In combination with the first aspect, in some embodiments of the first aspect, the included angle between the first light guide part and the second light guide part is greater than or equal to 90°.
[0009] In combination with the first aspect, in some embodiments of the first aspect, the second light guide part includes an illumination end, and the illumination end faces the double-sided cell laminated piece.
[0010] In combination with the first aspect, in some embodiments of the first aspect, the illumination end is provided with a light diffuser.
[0011] In combination with the first aspect, in some embodiments of the first aspect, the first light guide part includes a light collecting end, and the light collecting end is a plane.
[0012] In combination with the first aspect, in some embodiments of the first aspect, the light collecting end of the light guide pipe is provided with a light collecting cover.
[0013] With reference to the first aspect, in some embodiments of the first aspect, the frame further comprises a second frame body, the second frame body is arranged outside the light pipe.
[0014] With reference to the first aspect, in some embodiments of the first aspect, the first frame body and the second frame body are integrally formed, and the plurality of light pipes are arranged outside the first frame body.
[0015] The second aspect provides a photovoltaic module, comprising a bifacial cell laminate and the frame as provided in the first aspect and any one of the embodiments thereof, the frame bearing the bifacial cell laminate.
[0016] The third aspect provides a photovoltaic system, comprising the photovoltaic module as provided in the second aspect. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 A cross-sectional view of a frame provided in the present application;
[0018] Figure 2 A structural schematic view of a light pipe provided in the present application;
[0019] Figure 3 A cross-sectional view of another frame provided in the present application;
[0020] Figure 4 A top view of a frame provided in the present application;
[0021] Figure 5 A structural schematic view of a frame provided in the present application;
[0022] Figure 6 A structural schematic view of another frame provided in the present application;
[0023] Figure 7 A structural schematic view of a photovoltaic module provided in the present application. DETAILED DESCRIPTION
[0024] In the description of the present application, unless otherwise specified, “plurality” means two or more than two. “At least one of the following” or similar expressions means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple.
[0025] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first", "second", etc. are used to distinguish the same or similar items with basically the same function and role. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the quantity and execution order, and the terms "first", "second", etc. also do not necessarily mean different.
[0026] Meanwhile, in the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more advantageous or superior than other embodiments or design solutions. Rather, the use of the words "exemplary" or "for example" is intended to present relevant concepts in a specific manner, facilitating understanding.
[0027] It can be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It can be understood that in various embodiments of the present application, the size of the serial number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
[0028] It can be understood that in the present application, "when", "if" and "if" all refer to making corresponding processing under certain objective circumstances, not limited to time, and do not require a judgment action when implementing, nor does it mean that there are other limitations.
[0029] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects. Also, in some scenarios, it can be combined with other features according to the needs. Correspondingly, the devices given in the embodiments of the present application can also implement these features or functions, which will not be described here.
[0030] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments and implementation methods of the various embodiments in this application, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the implementation methods of the various embodiments are consistent and can be mutually referenced. The technical features in different embodiments and between the implementation methods of the various embodiments can be combined according to their inherent logical relationships to form new embodiments, implementation methods, implementation methods, or implementation approaches. The following embodiments of this application do not constitute a limitation on the scope of protection of this application.
[0031] To maximize the power generation of photovoltaic modules, bifacial photovoltaic modules have gradually become the mainstream. Bifacial photovoltaic modules include bifacial cells that can generate electricity on both the front and back sides.
[0032] Because the back side of the bifacial solar cell is always under low light conditions, the power generation on the back side of the bifacial solar cell is only about 3% of the total power generation. Therefore, the power generation efficiency of the back side of the bifacial solar cell is low.
[0033] To address the aforementioned problems, this utility model provides a frame for supporting a double-sided battery laminate. Figure 1 A cross-sectional view of a frame provided by this utility model, such as Figure 1 As shown, the frame 10 includes: a first frame 101 for supporting the double-sided battery laminate; and a light guide 102 including a first light guide 1021 and a second light guide 1022. The first light guide 1021 is disposed on the outside of the first frame 101, and the second light guide 1022 is connected to the first light guide 1021 and disposed on the bottom side of the first frame 101, facing the inside of the first frame 101.
[0034] The first frame 101 can be made of steel, glass, or ceramic. Of course, the first frame 101 can also be made of other materials. This utility model does not impose specific restrictions on this.
[0035] The structure of the first frame 101 can be... Figure 1 The structure shown is, of course, the structure of the first frame 101 can also be other structures, and this utility model does not impose specific limitations on it.
[0036] The first light guide 1021 and the second light guide 1022 can be made of glass or plastic. Of course, the first light guide 1021 and the second light guide 1022 can also be made of other transparent materials. This utility model does not impose specific limitations on this.
[0037] The first light guide part 1021 and the second light guide part 1022 are integrally formed.
[0038] The first light guide part 1021 can be attached to the outer side of the first frame 101 by adhesion, and the second light guide part 1022 can be attached to the bottom side of the first frame 101 by adhesion.
[0039] The first light guide part 1021 and the second light guide part 1022 can be hollow, with the inner wall coated with a light reflection coating, or the first light guide part 1021 and the second light guide part 1022 can be solid, with the outer wall coated with a light reflection coating, and the utility model does not make specific limitation on this.
[0040] The cross section of the first light guide part 1021 and the second light guide part 1022 can be circular, or the cross section of the first light guide part 1021 and the second light guide part 1022 can be rectangular, and the utility model does not make specific limitation on this.
[0041] The included angle between the first light guide part 1021 and the second light guide part 1022 is greater than or equal to 90°.
[0042] As shown in the example, Figure 1 The included angle between the first light guide part 1021 and the second light guide part 1022 is equal to 90°.
[0043] Based on the frame shown in Figure 1 The first light guide part 1021 of the light guide pipe 102 is arranged on the outer side of the first frame 101 of the frame, the second light guide part 1022 of the light guide pipe 102 is connected with the first light guide part 1021 and arranged on the bottom side of the first frame 101, and faces the inner side of the first frame 101. When the first frame 101 carries the double-sided battery laminated piece, the light can be conducted to the back of the double-sided battery laminated piece, thereby improving the power generation efficiency of the back of the double-sided photovoltaic module.
[0044] Taking the cross section of the first light guide part 1021 and the second light guide part 1022 as circular and the included angle between the first light guide part 1021 and the second light guide part 1022 as 90° as an example, Figure 2 The structure diagram of the light guide pipe 102 provided by the utility model is shown in the example, Figure 2 The first light guide part 1021 includes a light collecting end 10211, and the light collecting end 10211 is a plane. Compared with the light collecting end 10211 of other shapes, in the case that the light collecting end 10211 is a plane, the light collecting end 10211 can capture light from all directions, reduce the number of refraction and reflection of light, and thereby improve the light collecting efficiency of the light collecting end 10211.
[0045] The light collecting end 10211 is provided with a light collecting cover 10212. In this way, the light collecting efficiency of the light guide pipe 102 can be enhanced.
[0046] The material of the light cover 10212 can be tempered glass, polycarbonate, and of course, the light cover 10212 can also be other materials, and the utility model does not make specific limitation to this.
[0047] As shown in Figure 2 The light cover 10212 is fixedly installed on the light end 10211 through the light cover sealing ring 10213, so that the installation stability of the light cover 10212 and the sealing property of the light pipe 102 can be increased.
[0048] The second light guide part 1022 comprises an illumination end 10221, and the illumination end 10221 is directed to the bifacial cell laminate. Figure 2 As shown in
[0049] The illumination end 10221 is provided with a light diffuser 10222, so that the illumination range of the illumination end 10221 can be increased, and the power generation efficiency of the back surface of the bifacial cell laminate can be further improved.
[0050] The material of the light diffuser 10222 can be glass, polycarbonate, and of course, the light diffuser 10222 can also be other materials, and the utility model does not make specific limitation to this.
[0051] As shown in Figure 2 The light diffuser 10222 is fixedly installed on the illumination end 10221 through the light diffuser sealing ring 10223, so that the installation stability of the light diffuser 10222 and the sealing property of the light pipe 102 can be increased.
[0052] Figure 3 As shown in Figure 3 The frame further comprises a second frame body 103, and the second frame body 103 is arranged outside the light pipe 102.
[0053] The second frame body 103 can be made of steel, glass or ceramic, and of course, the second frame body 103 can also be made of other materials, and the utility model does not make specific limitation to this.
[0054] The structure of the second frame body 103 can be Figure 3The structure shown, of course, the structure of the second frame body 103 can also be other structures, the utility model does not make specific limitation to this.
[0055] In some embodiments, the second frame body 103 can be attached to the outside of the light pipe 102 by bonding. In this way, the light pipe 102 can be protected.
[0056] In still some embodiments, Figure 4 A top view of a frame provided by the present application is shown in Figure 4 As shown, the first frame body 101 and the second frame body 103 are integrally formed, and a plurality of light pipes 102 are arranged at intervals on the outside of the first frame body 101. In this way, the mechanical strength of the frame can be improved while the light pipes 102 are protected.
[0057] In this embodiment, it can be considered that there is a containing groove in the frame that can accommodate the light pipe 102, the light pipe 102 is located in the containing groove, one side of the light pipe 102 is the second frame body 103, and the other side of the light pipe 102 is the first frame body 101.
[0058] Figure 5 A structural schematic view of a frame provided by the present application is shown in Figure 5 The frame shown is an existing frame, Figure 5 a is a top view of the existing frame, Figure 5 b is a sectional view of the first position in the existing frame, as shown in Figure 5 a and b, the existing frame does not have the light pipe 102, and light cannot pass through the frame.
[0059] Figure 6 A structural schematic view of another frame provided by the present application is shown in Figure 6 a is Figure 4 a sectional view of the second position of the frame, as shown in Figure 6 a, the second position of the frame is provided with the light pipe 102, light can enter from the light collecting end 10211 of the light pipe 102 at the second position and exit from the light emitting end 10221 of the light pipe 102 at the second position. Figure 6 b is Figure 4 a sectional view of the third position of the frame, as shown in Figure 6 b, since the first frame body 101 and the second frame body 103 are integrally formed, and a plurality of light pipes 102 are arranged at intervals on the outside of the first frame body 101, the third position of the frame is not provided with the light pipe 102, the third position is the position where the first frame body 101 and the second frame body 103 are connected, and light cannot pass through the third position.
[0060] The embodiment of the present application provides a photovoltaic module, which comprises a bifacial cell laminate and the above-mentioned frame, and the frame carries the bifacial cell laminate.
[0061] Figure 7 A structural schematic diagram of a photovoltaic module provided by the present application is shown in the figure, Figure 7 As shown in the figure, the first light guide part 1021 of the light guide pipe 102 is arranged outside the first frame body 101 of the frame, the second light guide part 1022 of the light guide pipe 102 is connected with the first light guide part 1021 and arranged at the bottom side of the first frame body 101 and faces the inside of the first frame body 101, when the first frame body 101 carries the bifacial cell laminate, the light can be conducted to the back of the bifacial cell laminate, thereby improving the power generation efficiency of the back of the bifacial photovoltaic module.
[0062] The plurality of bifacial cell laminates in the photovoltaic module can be connected in series one by one to form a cell string, thereby realizing the series connection of the current, for example, the series connection of the bifacial cell laminates can be realized by arranging a series connecting piece (a bus bar, an interconnecting strip), a conductive back plate and the like.
[0063] The embodiment of the present application provides a photovoltaic system, which comprises the above-mentioned photovoltaic module.
[0064] In the embodiment, the photovoltaic system can be applied in a photovoltaic power station, such as a ground power station, a roof power station, a water surface power station and the like, and can also be applied in a device or apparatus using solar energy to generate power, such as a user solar power source, a solar street lamp, a solar car, a solar building and the like. Of course, it can be understood that the application scenarios of the photovoltaic system are not limited to this, that is to say, the photovoltaic system can be applied in all fields requiring solar energy to generate power. Taking a photovoltaic power generation system network as an example, the photovoltaic system can comprise a photovoltaic array, a current combiner and an inverter, the photovoltaic array can be an array combination of a plurality of photovoltaic modules, for example, a plurality of photovoltaic modules can form a plurality of photovoltaic arrays, the photovoltaic array is connected with the current combiner, the current combiner can combine the current generated by the photovoltaic array, the combined current flows through the inverter to convert into alternating current required by a power grid, and then the alternating current is connected to a power network to realize solar power supply.
[0065] In addition, the above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A frame for carrying a battery laminate, characterized by, The frame comprises: a first frame body for carrying the bifacial cell laminate; a light guide pipe comprising a first light guide part and a second light guide part, the first light guide part is arranged outside the first frame body, the second light guide part is connected with the first light guide part and is arranged at the bottom side of the first frame body, and faces the inside of the first frame body.
2. The bezel of claim 1, wherein, The included angle between the first light guide part and the second light guide part is greater than or equal to 90°.
3. The bezel of claim 2, wherein, The second light guide part comprises an illumination end, and the illumination end faces the bifacial cell laminate.
4. The bezel of claim 3, wherein, The illumination end is provided with a light diffuser.
5. The bezel of claim 1, wherein, The first light guide part comprises a light collecting end, and the light collecting end is a plane.
6. The bezel of claim 5, wherein, The light collecting end is provided with a light collecting cover.
7. The border of any of claims 1-5, wherein, The frame further comprises a second frame body, and the second frame body is arranged outside the light guide pipe.
8. The bezel of claim 7, wherein, The first frame body and the second frame body are integrally formed, and a plurality of light guide pipes are arranged at intervals outside the first frame body.
9. A photovoltaic module, characterized by, A photovoltaic module comprising the bifacial cell laminate and the frame according to any one of claims 1 to 8, wherein the frame carries the bifacial cell laminate.
10. A photovoltaic system characterized by, The photovoltaic module according to claim 9.