Salt-spray-resistant double-glass photovoltaic module

Abstract

A salt-fog-resistant double-glass photovoltaic module comprises an aluminum alloy frame which is clamped and fixed with front glass and back glass, the surface of the aluminum alloy frame is coated with an acid-resistant covering film, the aluminum alloy frame comprises a heat dissipation backboard part, installation through holes are formed in the heat dissipation backboard part in an array mode, and heat dissipation needles are arranged in the installation through holes; an acid-resistant plugging column is arranged in the mounting through hole, and comprises a pressing part which is positioned on the outer side of the mounting through hole and is used for covering the mounting through hole, and a separating part which is connected with the pressing part, is used for allowing the heat dissipation needle to pass through and is used for separating the inner wall of the mounting through hole from the heat dissipation needle. According to the salt-spray-resistant double-glass photovoltaic assembly, on the premise that the heat dissipation performance is guaranteed, the salt-spray corrosion resistance of the aluminum alloy frame is better, and the service life of the double-glass photovoltaic assembly is longer.

Description

Technical Field

[0001] The utility model relates to a salt fog resistant double-glass photovoltaic component, belonging to the field of photovoltaic component structure. Background Art

[0002] The biggest difference between double-glass photovoltaic modules and ordinary flat-panel photovoltaic modules is the backplane material. The backplane of double-glass photovoltaic modules is also a piece of glass, while the backplane of ordinary flat-panel photovoltaic modules is a piece of synthetic resin.

[0003] Therefore, it is conceivable that the advantages of double-glass photovoltaic modules include at least: the reflected light from the ground can also generate electricity, the glass back panel has better wear resistance, better insulation, higher fireproof level, almost no water penetration, and outstanding overall weather resistance. Therefore, the mainstream photovoltaic modules on the market now are double-glass photovoltaic modules.

[0004] Double-glass photovoltaic modules also need to be used in salt spray environments, and special attention should be paid to the salt spray corrosion resistance of double-glass photovoltaic modules. Double-glass photovoltaic modules also need to have the most basic heat dissipation function.

[0005] Another Chinese patent with the authorization announcement number CN210607288 U and the patentee being the applicant discloses a salt-fog resistant photovoltaic module packaging structure, including the aluminum alloy frame and the support base wrapped with an acid-resistant coating, the connection between the acid-resistant coating and the aluminum alloy frame and the support base is fixed by a sealing fixing ring, and the aluminum alloy frame is provided with an array of heat dissipation holes, and heat dissipation pins are inserted in the heat dissipation holes, which are connected to the inside of the support base through the heat dissipation pins inserted through the heat dissipation holes, and the heat dissipation pins extend outward through the acid-resistant coating. In this technical solution, the aluminum alloy frame and the support base are wrapped with an acid-resistant coating to prevent aluminum from oxidizing and corroding in the air, thereby ensuring the structural strength of the aluminum alloy frame and the life of the entire photovoltaic module. The presence of heat dissipation holes and heat dissipation pins enhances the heat dissipation capacity and improves the power generation efficiency of the photovoltaic module and the entire photovoltaic power generation system.

[0006] Although the photovoltaic module is a single-glass photovoltaic module, its aluminum alloy frame can also be applied to double-glass photovoltaic modules. However, the applicant found that the double-glass photovoltaic module using this aluminum alloy frame as the frame also has the following hidden dangers: the hole structure on the aluminum alloy frame, that is, the heat dissipation hole, lacks effective shielding, and has a high probability of contacting with the outside air. The external salt spray air and moisture will slowly pass through the holes left by the heat dissipation pins through the acid-resistant coating and contact the hole wall of the hole structure, causing the aluminum alloy frame to corrode from the hole structure and causing the overall structural strength to deteriorate. Utility Model Content

[0007] In view of the deficiencies in the prior art, the present application provides a salt-fog resistant double-glass photovoltaic module. Under the premise of ensuring heat dissipation performance, the salt-fog corrosion resistance of the aluminum alloy frame is better, and the service life of the double-glass photovoltaic module is longer.

[0008] A salt-fog resistant double-glass photovoltaic module, comprising an aluminum alloy frame which is clamped and fixed with a front glass and a back glass and is coated with an acid-resistant coating on the surface, the aluminum alloy frame comprising a heat dissipation back plate portion, the heat dissipation back plate portion is provided with an array of mounting through holes, and heat dissipation pins are provided in the mounting through holes;

[0009] An acid-resistant sealing column is provided in the mounting through hole, and the acid-resistant sealing column includes a pressing part located outside the mounting through hole and used to cover the mounting through hole, and a separating part connected to the pressing part for the heat dissipation needle to pass through and used to separate the inner wall of the mounting through hole from the heat dissipation needle.

[0010] Preferably, the inner wall of the mounting through hole is provided with an internal connecting thread, and the partition portion has an external connecting thread that cooperates with the internal connecting thread.

[0011] Preferably, a reinforcing nut coaxially arranged with the corresponding mounting through hole is provided on the inner side of the heat dissipation back plate portion, the partition portion extends along the axial direction of the reinforcing nut to the reinforcing nut, and the partition portion has an external thread that cooperates with the reinforcing nut.

[0012] Preferably, the reinforcing nut is made of metal, and the reinforcing nut is connected to the aluminum alloy frame by welding.

[0013] Preferably, the end of the separating portion protrudes from the axial end surface of the reinforcing nut.

[0014] Preferably, the photovoltaic module further comprises a first adhesive film, a second adhesive film, and a battery cell, and the front glass, the back glass, the first adhesive film, the second adhesive film, and the battery cell constitute the main body of the photovoltaic module;

[0015] The acid-resistant plugging column is an EVA flexible soft column made of high molecular polymer;

[0016] The partition part flexibly positions the photovoltaic component body when the photovoltaic component body is installed on the aluminum alloy frame, and forms a flexible abutting structure abutting against the side surface of the photovoltaic component body.

[0017] Preferably, a heat exchange groove is provided on the end surface of the partition portion facing the battery cell, and the corresponding heat dissipation needle on the partition portion passes through the heat exchange groove. A heat exchange channel connecting the outer space K of the partition portion and the heat exchange groove is provided on the portion of the partition portion protruding from the reinforcing nut.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1: The salt-fog resistant double-glass photovoltaic module in the utility model has better salt-fog corrosion resistance of the aluminum alloy frame while ensuring the heat dissipation performance, and the service life of the double-glass photovoltaic module is longer.

[0020] 2: In the present invention, a reinforcing nut is arranged on the inner side of the heat dissipation back plate, which not only strengthens the aluminum alloy frame, but also facilitates the installation of the acid-resistant blocking column.

[0021] 3: In the utility model, when the photovoltaic module body is installed on the aluminum alloy frame, the partition part flexibly positions the photovoltaic module body and forms a flexible supporting structure that supports the side of the photovoltaic module body, which can reduce the risk of bursting or hidden cracks of the photovoltaic module when framing and provide better protection for the photovoltaic module body after framing.

[0022] 4: In the present invention, heat exchange grooves and heat exchange channels are arranged on the partitions, which is conducive to timely dissipation of heat generated by the part of the photovoltaic component body located between adjacent partitions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a salt-fog resistant double-glass photovoltaic module;

[0024] Figure 2 This is a top view of the acid-resistant plugging column after it is cut open;

[0025] Figure 3 This is the arrangement diagram of multiple acid-resistant plugging columns. DETAILED DESCRIPTION

[0026] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0027] Example: Figure 1A salt-fog resistant double-glass photovoltaic module is provided, comprising a front glass 1, a back glass 2, a battery cell 73, a first adhesive film 71 connecting the battery cell 73 and the front glass 1, a second adhesive film 72 connecting the battery cell 73 and the back glass 2, and other basic and necessary structures. The front glass 1, the back glass 2, the first adhesive film 71, the second adhesive film 72, and the battery cell 73 constitute a photovoltaic module body, and further comprises an aluminum alloy frame 3 which is clamped and fixed with the front glass 1 and the back glass 2 and the surface of which is coated with an acid-resistant coating 4. The acid-resistant coating 4 is an EVA flexible soft film made of a high molecular polymer. Of course, the surface of the front glass 1 and the back glass 2 is also coated with the acid-resistant coating 4. The aluminum alloy frame 3 comprises a heat dissipation back plate portion 31. The heat dissipation back plate portion 31 is provided with an array of mounting through holes 32. Heat dissipation pins 33 are provided in the mounting through holes 32. The heat dissipation pins 33 are in contact with the battery cell 73 in the photovoltaic module body. The acid-resistant coating 4 plays a major role in preventing salt spray corrosion, and the presence of the heat dissipation pins 33 improves the heat dissipation capacity of the photovoltaic module, thereby improving the power generation efficiency of the photovoltaic module and the entire photovoltaic power generation system.

[0028] Different from the prior art, in this embodiment, an acid-resistant sealing column 5 is provided in the mounting hole 32. The acid-resistant sealing column 5 is an EVA flexible soft column made of a high molecular polymer. The acid-resistant sealing column 5 comprises a pressing portion 51 and a partition portion 52 connected to the pressing portion 51. The pressing portion 51 is located on the outside of the mounting hole 32 and is used to cover the mounting hole 32 to prevent external salt spray and moisture from contacting the hole edge of the mounting hole 32. The partition portion 52 is for the heat dissipation needle 33 to pass through and is used to separate the inner wall of the mounting hole 32 from the heat dissipation needle 33 to prevent external salt spray and moisture from contacting the inner wall of the mounting hole 32.

[0029] Under the action of the acid-resistant sealing column 5, the hole structure on the aluminum alloy frame 3, that is, the installation through hole 32, is separated from the outside world to a great extent, preventing the installation through hole 32 from being corroded by salt mist and moisture, thereby reducing the hidden danger of the entire photovoltaic module being corroded at the installation through hole 32 and the overall structural strength being deteriorated, thereby improving its service life.

[0030] In order to install the acid-resistant plugging column 5 in the installation hole 32, an internal connecting thread can be provided on the inner wall of the installation hole 32, and an external connecting thread that cooperates with the internal connecting thread is provided on the partition portion 52. This installation method is not shown in the drawings.

[0031] In this embodiment, a reinforcing nut 6 is provided on the inner side of the heat dissipation back plate portion 31 and is coaxially arranged with the corresponding mounting through hole 32. The partition portion 52 extends to the reinforcing nut 6 along the axial direction of the reinforcing nut 6, and the partition portion 52 has an external thread that is matched with the reinforcing nut 6. The partition portion 52 and the reinforcing nut 6 cooperate to conveniently install the acid-resistant sealing column 5 in the mounting through hole 32. At the same time, the reinforcing nut 6 structurally reinforces the portion of the aluminum alloy frame 3 at the mounting through hole 32, thereby reducing the deformation risk of the aluminum alloy frame 3.

[0032] The reinforcing nut 6 is made of metal, such as an iron nut, and is connected to the aluminum alloy frame 3 by conventional welding.

[0033] The end of the partition portion 52 protrudes from the axial end face of the reinforcing nut 6, extending the length of the acid-resistant sealing column 5. In this way, it is more difficult for salt mist moisture to pass through the through holes provided on the acid-resistant sealing column 5 for the heat dissipation needles 33 to pass through and enter the interior of the photovoltaic module.

[0034] Since the partition 52 protrudes from the structural setting of the reinforcing nut 6, when the salt spray resistant double-glass photovoltaic module is framed, the photovoltaic module body can be directly installed into the frame notch on the aluminum alloy frame 3 and abutted against the protruding partition 52. In this process, the partition 52 plays a role of flexible positioning on the photovoltaic module body, that is, the photovoltaic module body is subjected to a small rigid impact when it contacts and collides with the partition 52 during framing, and the risk of bursting or hidden cracking of the photovoltaic module body is small. After framing, the partition 52 forms a flexible abutting structure against the side of the photovoltaic module body, reducing the impact during transportation, for example, and protecting the photovoltaic module. In the prior art, if you want to achieve this effect, you often need to set an additional flexible protection structure on the side of the photovoltaic module body.

[0035] The heat dissipation pin 33 is spirally connected to the partition 52. This connection method not only facilitates the installation of the heat dissipation pin 33, but also enables the heat dissipation pin 33 to maintain contact with the battery cell 73, thereby ensuring the heat dissipation effect.

[0036] like Figure 2-3 As shown, a heat exchange groove 53 is provided on the end surface of the partition portion 52 facing the battery cell 73, and the heat dissipation pin 33 corresponding to the partition portion 52 passes through the heat exchange groove 53, that is, the heat dissipation pin 33 is exposed in the heat exchange groove 53, and a heat exchange channel 54 connecting the outer space K of the partition portion 52 and the heat exchange groove 53 is provided on the portion of the partition portion 52 protruding from the reinforcing nut 6.

[0037] The heat generated by the part of the photovoltaic module body located between adjacent partitions 52 can be dissipated into the air in the nearby space K. It can then be heat-conducted with the air inside the heat exchange groove 53 through the heat exchange channel 54 on the nearest partition 52, and finally the heat is conducted to the heat dissipation pins 33 exposed in the heat exchange groove 53, so that the heat can be dissipated in time through the heat dissipation pins 33.

[0038] Of course, when space K needs to exist, in the double-glass photovoltaic module in this case, when the front glass 1 and the aluminum alloy frame 3 are sealed, the edges of the frame grooves of the front glass 1 and the aluminum alloy frame 3 are sealed with sealant, and when the back glass 2 and the aluminum alloy frame 3 are sealed, the edges of the frame grooves of the back glass 2 and the aluminum alloy frame 3 are sealed with sealant.

[0039] The above embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the utility model should fall within the protection scope of the utility model, and the technical contents of the utility model for protection have been fully recorded in the claims.

Claims

1. A salt-fog resistant double-glass photovoltaic module, comprising an aluminum alloy frame (3) which is clamped and fixed with a front glass (1) and a back glass (2) and has an acid-resistant coating (4) on its surface, the aluminum alloy frame (3) comprising a heat dissipation back plate (31), the heat dissipation back plate (31) being provided with an array of mounting through holes (32), and heat dissipation pins (33) being provided in the mounting through holes (32); characterized in that: An acid-resistant plugging column (5) is provided in the mounting through hole (32), and the acid-resistant plugging column (5) comprises a pressing portion (51) located outside the mounting through hole (32) and used to cover the mounting through hole (32), and a separating portion (52) connected to the pressing portion (51) and through which the heat dissipation needle (33) passes and used to separate the inner wall of the mounting through hole (32) from the heat dissipation needle (33).

2. A salt fog resistant double-glass photovoltaic module according to claim 1, characterized in that: The inner wall of the mounting through hole (32) is provided with an internal connection thread, and the partition portion (52) has an external connection thread that cooperates with the internal connection thread.

3. The salt fog resistant double-glass photovoltaic module according to claim 1, characterized in that: A reinforcing nut (6) coaxially arranged with the corresponding mounting through hole (32) is arranged on the inner side of the heat dissipation back plate portion (31); the partition portion (52) extends along the axial direction of the reinforcing nut (6) to the reinforcing nut (6); and the partition portion (52) has an external thread that cooperates with the reinforcing nut (6).

4. A salt fog resistant double-glass photovoltaic module according to claim 3, characterized in that: The reinforcing nut (6) is made of metal, and the reinforcing nut (6) is connected to the aluminum alloy frame (3) by welding.

5. The salt fog resistant double-glass photovoltaic module according to claim 3, characterized in that: An end portion of the partition portion (52) protrudes from an axial end surface of the reinforcing nut (6).

6. A salt fog resistant double-glass photovoltaic module according to claim 5, characterized in that: The photovoltaic module further comprises a first adhesive film (71), a second adhesive film (72), and a battery cell (73); the front glass (1), the back glass (2), the first adhesive film (71), the second adhesive film (72), and the battery cell (73) constitute a main body of the photovoltaic module; The acid-resistant plugging column (5) is an EVA flexible soft column made of a high molecular polymer; The partition (52) flexibly positions the photovoltaic component body when the photovoltaic component body is installed on the aluminum alloy frame (3), and forms a flexible abutting structure that abuts against the side surface of the photovoltaic component body.

7. A salt fog resistant double-glass photovoltaic module according to claim 6, characterized in that: A heat exchange groove (53) is provided on the end surface of the partition portion (52) facing the battery cell (73); a heat exchange pin (33) corresponding to the partition portion (52) passes through the heat exchange groove (53); and a heat exchange channel (54) is provided on the portion of the partition portion (52) protruding from the reinforcing nut (6) and connecting the outer space K of the partition portion (52) and the heat exchange groove (53).

8. The salt fog resistant double-glass photovoltaic module according to claim 6, characterized in that: The heat dissipation pin (33) is spirally connected to the partition portion (52), and the heat dissipation pin (33) is in contact with the battery sheet (73).

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