High-sealing double-glass photovoltaic module

Abstract

The utility model discloses a high-sealing double-glass photovoltaic module, which comprises front glass, back glass and a photovoltaic cell layer positioned between the front glass and the back glass, and the photovoltaic cell layer is fixed through an upper EVA (Ethylene Vinyl Acetate) packaging layer and a lower EVA packaging layer. The edge of the assembly is provided with a double-layer sealing structure, the first sealing layer is bonded with the edge of the front glass and the edge of the back glass through a double-component silicone sealant, the second sealing layer is composed of a flexible rubber sealing strip embedded into the aluminum alloy frame, and the rubber sealing strip is tightly attached to the inner wall of the aluminum alloy frame. The assembly also comprises a phase change heat dissipation material and a temperature monitoring sensor, and can actively dissipate heat at high temperature so as to keep the internal temperature stable. In addition, an ultraviolet-proof high-reflection coating is arranged on the surface of the front glass, and a buffer cushion layer is embedded in the aluminum alloy frame, so that stress caused by thermal expansion and cold contraction is effectively absorbed. The device is compact in structure and excellent in performance, and is suitable for a photovoltaic power generation system under various complex weather conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module technical field, concretely is a kind of high sealing double glass photovoltaic module. BACKGROUND

[0002] At present, the traditional double glass photovoltaic module is usually composed of front glass, back glass and photovoltaic cell layer between the two, and the cell layer is sealed and fixed by EVA encapsulation layer to realize basic protection function and photoelectric conversion function. In order to enhance the weather resistance and mechanical strength of the module, the module edge is often sealed by single layer of silicone sealant, and is fixed by aluminum alloy frame. However, in the long-term operation process, due to the influence of high temperature, high humidity, wind sand and ultraviolet radiation of external environment and other factors, the photovoltaic module of this kind of traditional structure still has obvious deficiencies in sealing performance and heat dissipation performance.

[0003] Firstly, in terms of sealing performance, the traditional module directly bonds the front glass and the back glass edge with single layer of sealant, although the initial sealing effect is acceptable, but after long-term use, due to thermal expansion and contraction and external stress, the sealant is easy to age and crack, thus causing water vapor or dust to enter the inside of the module, causing corrosion and performance degradation of photovoltaic cells, and shortening the service life of the module.

[0004] Secondly, in terms of heat dissipation performance, the heat of the traditional photovoltaic module is mainly dissipated through the glass surface naturally, and lacks special heat dissipation structure design. Especially in high temperature environment, the heat generated by the operation of photovoltaic cells cannot be effectively conducted to the outside, which easily leads to the increase of the temperature of the module, thus causing the significant decrease of the efficiency of the cells (i.e. "hot spot effect"), and even possibly damaging the internal structure of the module.

[0005] Therefore, it can be seen that the existing traditional technical solution has obvious defects in sealing performance and heat dissipation performance, and it is difficult to meet the needs of long-term reliable operation of photovoltaic module in harsh environment. INVENTION CONTENTS

[0006] The utility model relates to photovoltaic module field, concretely relates to a kind of high sealing double glass photovoltaic module, for improving the sealing performance and heat dissipation performance of photovoltaic module, to solve the technical problems that existing photovoltaic module is easily eroded by water vapor, dust in long-term use and the performance attenuation caused by low heat dissipation efficiency.

[0007] The high sealing double glass photovoltaic module of the utility model includes front glass and back glass, for encapsulating photovoltaic cell layer;Photovoltaic cell layer is arranged between front glass and back glass, and is fixed and protected by upper and lower two layers of EVA encapsulation layer. Double layer sealing structure is designed at the edge of the module, and the structure includes:

[0008] The first sealing layer: the edges of the front glass and the back glass are bonded and fixed by using a two-component silicone sealant, so as to realize the basic sealing function.

[0009] The second sealing layer: the outer edges of the front glass and the back glass are provided with flexible rubber sealing strips embedded in the aluminum alloy frame, and the rubber sealing strips are tightly attached to the inner walls of the aluminum alloy frame, so as to further improve the sealing performance of the assembly.

[0010] In addition, the utility model discloses the following innovative design, significantly improve the heat dissipation performance of assembly:

[0011] The heat dissipation channel is arranged in the aluminum alloy frame and is used for guiding heat to conduct outward from the front glass and the back glass.

[0012] The back glass surface is provided with a high-thermal-conductivity coating to further enhance the heat dissipation effect.

[0013] The EVA encapsulation layer adopts a high-thermal-conductivity EVA film, and the internal heat transfer efficiency is improved by doping high-thermal-conductivity fillers.

[0014] The photovoltaic cell layer and the aluminum alloy frame are connected through a high-thermal-conductivity flexible connecting pad layer, and the internal heat of the assembly is efficiently transferred to the aluminum alloy frame.

[0015] In order to improve the long-term operation stability of the assembly, the utility model further optimizes the following functional designs:

[0016] The phase-change heat dissipation material is arranged between the back glass and the photovoltaic cell layer, and the material can absorb heat at high temperature and release heat at low temperature, so as to maintain the temperature stability of the assembly.

[0017] The front glass surface is provided with an anti-ultraviolet high-reflection coating for reflecting excess ultraviolet and infrared light, reducing heat absorption and delaying the aging of the assembly.

[0018] The aluminum alloy frame is embedded with a buffer pad layer, and the buffer pad layer is made of foamed polyurethane material, which can effectively absorb the stress caused by thermal expansion and cold contraction, and avoid the damage of the assembly structure.

[0019] The utility model also integrates an intelligent monitoring function, and the temperature monitoring sensor inside the assembly is used to detect the internal temperature of the assembly in real time.

[0020] Through the above technical scheme, the utility model significantly improves the sealing performance, heat dissipation performance and long-term stability of the photovoltaic assembly, and can be widely used in photovoltaic power generation systems in various complex climate environments.

[0021] The utility model discloses the obtained beneficial effects are:

[0022] 1.The utility model discloses a double -layer sealing structure's design is adopted, and the first sealing layer (5) adopts two -component silicone sealant and sticks the edge of front glass (1) and back glass (2), ensures the basic sealing performance of assembly, and the second sealing layer (6) is formed by the flexible rubber sealing strip of embedding in the aluminum alloy frame (7), and is tightly attached with the inner wall of aluminum alloy frame (7), further promotes the sealing effect, thereby effectively prevent the water vapor and dust from entering the inside of assembly, prolongs the service life of assembly.

[0023] 2.The utility model discloses a heat dissipation channel (8) in the aluminum alloy frame (7) guides heat conduction, and high -thermal conductivity coating (9) is set up on the surface of back glass (2) to enhance the heat dissipation effect. Further, the assembly adopts the heat conduction enhancement type EVA film (4) and high -thermal conductivity flexible connecting pad layer, and makes the internal heat efficient transmission to aluminum alloy frame (7), effectively reduces the performance attenuation of assembly due to overheating. DRAWINGS

[0024] Fig. 1 It is the whole structure schematic diagram of an embodiment of the utility model;

[0025] Fig. 2 It is the aluminum alloy frame inner section structure schematic diagram of an embodiment of the utility model.

[0026] Reference signs:

[0027] 1, front glass;2, back glass;3, photovoltaic cell piece layer;4, EVA encapsulation layer;5, first sealing layer;6, second sealing layer;7, aluminum alloy frame;8, heat dissipation channel;9, high -thermal conductivity coating;10, micro -type heat -removal hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantage of the utility model more clear and obvious, below combining with specific embodiment and referring to drawings, the utility model is further detailed.The embodiment of the utility model and the feature in the embodiment can be combined mutually in the case where there is no conflict.

[0029] It is understood that these descriptions are only exemplary, and the scope of the utility model is not limited.

[0030] Below combining with the drawings of the utility model Figs. 1-2 Some embodiments of the utility model are described, and a kind of high sealing double glass photovoltaic assembly is provided.

[0031] A kind of high sealing double glass photovoltaic assembly, comprising:

[0032] Front glass 1 and back glass 2, for encapsulating photovoltaic cell piece layer 3;

[0033] A photovoltaic cell layer 3 is arranged between the front glass 1 and the back glass 2, and the upper and lower EVA encapsulation layers 4;

[0034] A double-layer sealing structure is arranged on the edges of the front glass 1 and the back glass 2, and includes a first sealing layer 5 and a second sealing layer 6.

[0035] The first sealing layer 5 is made of a two-component silicone sealant, which is used to bond the edges of the front glass 1 and the back glass 2, so as to realize the basic sealing function of the module. The second sealing layer 6 is made of a flexible rubber sealing strip embedded in the aluminum alloy frame 7, which is tightly attached to the inner wall of the aluminum alloy frame 7, so as to further improve the sealing performance of the module.

[0036] In order to improve the heat dissipation performance of the module, a heat dissipation channel 8 is arranged in the aluminum alloy frame 7, which is used to guide the heat conduction from the front glass 1 and the back glass 2 to the outside; a high-thermal-conductivity coating 9 is arranged on the surface of the back glass 2, which further enhances the heat dissipation effect; the module uses a heat-conductivity-enhanced EVA encapsulation layer 4, which is made by doping high-thermal-conductivity fillers in the EVA film, so as to efficiently transfer the internal heat to the aluminum alloy frame 7; the photovoltaic cell layer 3 is connected to the aluminum alloy frame 7 through a high-thermal-conductivity flexible connecting pad layer, which is used to efficiently transfer the internal heat to the aluminum alloy frame 7.

[0037] Further, a phase-change heat dissipation material is arranged between the back glass 2 and the photovoltaic cell layer 3, which absorbs heat at high temperature and releases heat at low temperature, so as to maintain the internal temperature of the module stable; an anti-ultraviolet high-reflectivity coating is arranged on the surface of the front glass 1, which is used to reflect the excess ultraviolet and infrared light, reduce the heat absorption, and delay the aging of the module.

[0038] The aluminum alloy frame 7 is embedded with a buffer pad layer, which is made of foamed polyurethane material, and can absorb the stress caused by thermal expansion and cold contraction, so as to prevent the edge sealing failure or glass breakage of the module. In addition, a micro heat dissipation hole 10 is arranged on the surface of the aluminum alloy frame 7, which is used to further improve the heat dissipation performance, and a breathable waterproof film is arranged on the surface of the micro heat dissipation hole 10, so as to ensure the heat dissipation while preventing the water vapor from entering.

[0039] The utility model also integrates temperature monitoring function. Temperature monitoring sensor is arranged in the module, when sensor detects that the temperature inside the module exceeds the set threshold value, can through micro heat dissipation hole 10 on the aluminum alloy frame or external heat dissipation device initiative heat dissipation, so as to reduce the internal temperature of the module, ensure the safe operation.

[0040] Through the above-mentioned implementation, the utility model not only improves the sealing performance of the photovoltaic module, avoids the invasion of water vapor and dust, but also significantly improves the heat dissipation efficiency, effectively prevents the damage of high temperature to the performance of the module, prolongs the service life of the module, and can be widely applied to the photovoltaic power generation system under complex climate environment.

[0041] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A high seal, dual glass photovoltaic module, characterized by, The application relates to a photovoltaic module. The application comprises: a front glass (1) and a back glass (2) for encapsulating a photovoltaic cell layer (3); a photovoltaic cell layer (3) and two EVA encapsulation layers (4) arranged between the front glass (1) and the back glass (2); a double-layer sealing structure for covering the edges of the front glass (1) and the back glass (2), which comprises: a first sealing layer (5) for bonding the edges of the front glass (1) and the back glass (2) by using a two-component silicone sealant; a second sealing layer (6) arranged at the outer edges of the front glass (1) and the back glass (2) and composed of a flexible rubber sealing strip embedded in an aluminum alloy frame (7), the rubber sealing strip being tightly attached to the inner wall of the aluminum alloy frame (7); a heat dissipation channel (8) arranged in the aluminum alloy frame (7) for guiding heat from the front glass (1) and the back glass (2) to the outside; 2. A high seal double glass photovoltaic module according to claim 1, characterized in that, a high-thermal-conductivity coating (9) arranged on the surface of the back glass (2) for enhancing the heat dissipation effect.

3. A high seal double glass photovoltaic module according to claim 1, characterized in that, The surface of the aluminum alloy frame (7) is provided with micro heat dissipation holes (10), and the surface of the micro heat dissipation holes (10) is covered with a breathable waterproof film.

4. The high seal double glass photovoltaic module according to claim 1, wherein The EVA encapsulation layer (4) is a high-thermal-conductivity enhanced EVA film, and the EVA film is doped with high-thermal-conductivity fillers.

5. The high seal double glass photovoltaic module according to claim 1, wherein The photovoltaic cell layer (3) is connected to the aluminum alloy frame (7) through a high-thermal-conductivity flexible connecting pad layer for conducting heat in the module to the aluminum alloy frame (7).

6. A high seal double glass photovoltaic module according to claim 1, wherein A phase-change heat dissipation material is arranged between the back glass (2) and the photovoltaic cell layer (3), the phase-change heat dissipation material absorbing heat at high temperature and releasing heat at low temperature to maintain the temperature stability of the module.

7. A high seal double glass photovoltaic module according to claim 1, wherein The surface of the front glass (1) is provided with an ultraviolet-proof high-reflectivity coating for reflecting excess ultraviolet rays and infrared rays to reduce heat absorption.

8. The high seal double glass photovoltaic module according to claim 1, wherein The aluminum alloy frame (7) is embedded with a buffer pad layer, the buffer pad layer being made of foamed polyurethane material and used for absorbing stress caused by thermal expansion and cold contraction. The module is integrated with a temperature monitoring sensor, when the temperature in the module exceeds a set threshold value, the temperature of the module is reduced through the micro heat dissipation holes (10) or external heat dissipation devices.

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