CN213401217U

CN213401217U - Photovoltaic module

Info

Publication number: CN213401217U
Application number: CN202022184304.1U
Authority: CN
Inventors: 张军; 何帅; 万波
Original assignee: Hefei Ja Solar Technology Co ltd; Jingao Yangzhou New Energy Co ltd; Shanghai Ja Solar Pv Technology Co ltd
Current assignee: Hefei Ja Solar Technology Co ltd; Jingao Yangzhou New Energy Co ltd; Shanghai Ja Solar Pv Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-08
Anticipated expiration: 2030-09-29

Abstract

The utility model provides a photovoltaic module, this photovoltaic module from openly to the back side has stacked gradually positive coated glass, first encapsulation glued membrane, battery piece, second encapsulation glued membrane to and backplate or glass, wherein, first encapsulation glued membrane with at least one of second encapsulation glued membrane is the multilayer film. According to the utility model discloses photovoltaic module is through setting up the multilayer film as the encapsulation glued membrane, and every layer of glued membrane layer of multilayer film is through its specific function protection battery piece and other subassembly materials, and for conventional individual layer encapsulation mode, the quality reliability, the processing procedure stability and the comprehensive cost of subassembly are better.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic module technical field, concretely relates to photovoltaic module.

Background

With the development of photovoltaic module technology in recent years, different technologies are diversified, which brings great challenges to the quality and the manufacturing process of the module. However, no matter the technology of various components such as half-piece, laminated tile and split piece, or novel battery pieces such as back passivation and heterojunction and other novel materials, the packaging structure of the component is packaged into the component according to the sequence of coated glass, single-layer packaging adhesive film, battery piece, single-layer packaging adhesive film, back plate or glass.

However, such a conventional packaging method does not satisfy the requirements of new materials and technologies for the module, for example, a conventionally used single-layer packaging adhesive film is EVA or POE, when EVA is used, the resistance to PID (Potential Induced Degradation, hereinafter referred to as PID) and the resistance to wet heat aging of the module are relatively poor due to poor water vapor barrier property, and when POE is used, the material cost is high, and poor phenomena such as bubbles and delamination are likely to occur.

In addition, the packaging adhesive film is often required to have more protection functions in the module, and besides PID resistance, humidity and heat resistance and bubble separation reduction, the packaging adhesive film is also required to have excellent adhesion and ultraviolet resistance with other materials, and simultaneously protect the battery piece and the self performances of oxidation resistance, corrosion resistance and the like. In order to have such various properties, a large amount of additives and types of additives need to be added into the same material, which brings a challenge to the compatibility among the additives in the material and often causes a certain negative effect.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a photovoltaic module that quality reliability is good, processing procedure stability is high, comprehensive cost is lower.

In order to solve the technical problem, the utility model discloses a following technical scheme:

according to the utility model discloses photovoltaic module stacks gradually including positive coated glass, first encapsulation glued membrane, battery piece, second encapsulation glued membrane from the front towards the back to and backplate or glass, wherein, first encapsulation glued membrane with at least one of second encapsulation glued membrane is the multilayer film.

Furthermore, the thickness of each layer in the multilayer film is 0.1-0.5 mm.

Further, the first packaging adhesive film comprises a first adhesive film layer, the first adhesive film layer is connected with the front coated glass, the first adhesive film layer is an adhesive layer, and a second adhesive film layer and/or a third adhesive film layer are/is arranged on one side, close to the battery piece, of the first adhesive film layer, wherein the second adhesive film layer is a moisture-resistant and heat-resistant layer, and the third adhesive film layer is a chemical-resistant adhesive film layer.

Furthermore, the first adhesive film layer is a coupling agent cross-linked polyethylene-polyvinyl acetate copolymer material layer.

Still further, the second glue film layer is an ethylene-octene copolymer material layer.

Furthermore, the chemical resistant adhesive film layer is a polyethylene-polyvinyl acetate copolymer material layer added with an antioxidant and/or an anticorrosive agent.

Further, the second packaging adhesive film comprises a fourth adhesive film layer, the fourth adhesive film layer is connected with the battery piece, and the fourth adhesive film layer is the chemical-resistant adhesive film layer.

Further, the photovoltaic module may be a dual glass module, and the second encapsulant film further includes a fifth encapsulant film layer and/or a sixth encapsulant film layer disposed on a side of the fourth encapsulant film layer away from the solar cell, where the fifth encapsulant film layer is the heat and humidity resistant layer, and the sixth encapsulant film layer is the bonding layer.

In addition, the photovoltaic module can be a single glass module, the second packaging adhesive film further comprises a fifth adhesive film layer and/or a sixth adhesive film layer which is arranged on one side of the fourth adhesive film layer far away from the solar cell, wherein the fifth adhesive film layer is the heat and humidity resistant layer, and the sixth adhesive film layer is an ultraviolet resistant adhesive film layer.

Further, the ultraviolet resistant adhesive film layer is a polyethylene-polyvinyl acetate copolymer material layer dispersed with an ultraviolet absorbent.

The above technical scheme of the utility model one of following beneficial effect has at least:

compare in traditional packaging structure, the utility model discloses photovoltaic module is through setting up the multilayer film as the encapsulation glued membrane to make every layer of glued membrane layer give specific function, not only can promote photovoltaic module's anti PID nature, wet heat resistance, caking property, quality reliability such as anti-oxidant, can reduce the bubble and promote the stability of processing procedure simultaneously, reduce material cost.

Drawings

Fig. 1 is the utility model discloses photovoltaic module structure schematic diagram.

Reference numerals:

1. front coated glass; 2. a first adhesive film layer; 3. a second adhesive film layer; 4. a third adhesive film layer; 5. a battery piece; 6. a fourth adhesive film layer; 7. a fifth glue film layer; 8. a sixth glue film layer; 9. a back sheet or glass; 10. a first packaging adhesive film; 20. a second packaging adhesive film.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

The photovoltaic module according to the embodiments of the present invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, according to the photovoltaic module of the embodiment of the present invention, the front coated glass 1, the first encapsulant film 10, the battery piece 5, the second encapsulant film 20, and the back plate 9 are stacked in sequence from the front to the back.

At least one of the first packaging adhesive film 10 and the second packaging adhesive film 20 is a multilayer film. For example, the first adhesive sealant film 10 may be a multilayer film, and the second adhesive sealant film 20 may be a single-layer film, or vice versa, or both of them may be multilayer films. It is only necessary to design the device according to specific performance requirements.

The thickness of each of the first adhesive film 10 and the second adhesive film 20 may be 0.1-0.5 mm. The thickness of each layer may be adjusted according to the packaging requirements of the photovoltaic module, the materials used in each layer, the functions to be achieved, and other factors.

As an example, as shown in fig. 1, the first packaging adhesive film 10 may include a first adhesive film layer 2, a second adhesive film layer 3, and a third adhesive film layer 4. It should be noted that, here is only an example given for convenience of description, and it may be specifically determined that the first adhesive packaging film 10 specifically uses several layers and performs performance setting on each layer according to performance requirements of the photovoltaic module, a used material (for example, a material of front coated glass, a cell sheet, a back sheet or glass, and the like).

Wherein, the first adhesive film layer 2 is an adhesive layer and is connected with the front coated glass 1. Preferably, the first adhesive film layer 2 is a coupling agent cross-linked polyethylene-polyvinyl acetate copolymer (hereinafter referred to as EVA) material layer, and EVA itself has good adhesion, and the adhesion is further improved by adding the coupling agent, so that the risk of delamination can be reduced. The second adhesive film layer 3 is a heat and humidity resistant layer and is disposed on the side of the first adhesive film layer 2 close to the battery cell, that is, the second adhesive film layer 2 is closer to the battery cell 5 than the first adhesive film layer 1. Through setting up the second glued membrane layer 3 as damp-heat resistant layer, can effectively prevent the invasion of steam and ion, promote the anti PID performance and the damp-heat resistant performance of subassembly. Preferably, the moist heat resistant layer may be a layer of ethylene-octene copolymer (POE) material, and further, additives such as a moist heat resistant agent (e.g., epoxy-terminated reactive liquid nitrile rubber), a thickener (a copolymer of acrylonitrile-styrene-acrylate rubber), and the like may be added to the POE material to further improve the moist heat resistant property.

The third adhesive film layer 4 is a chemical-resistant adhesive film layer and is arranged between the second adhesive film layer 3 and the battery piece 5, besides the polar group ensures the bonding with the battery piece 5, the battery piece 5 is further protected by adding an antioxidant and/or an anticorrosive agent, and the oxidation and chemical corrosion of the grid line are reduced. Preferably, the third adhesive film layer 4 is a polyethylene-polyvinyl acetate copolymer material layer added with an antioxidant and/or an anticorrosive agent. Wherein the antioxidant and/or anticorrosive agent may be an antioxidant and/or anticorrosive agent commonly used in the field of adhesives.

Further, the second packaging adhesive film 20 may include a fourth adhesive film layer 6, a fifth adhesive film layer 7, and a sixth adhesive film layer 8. Similarly, the number of layers, the thickness of each layer, and the function of the second adhesive packaging film 20 may be designed accordingly according to requirements, and this is merely an example for convenience of description, and cannot be regarded as a specific structural limitation for the second adhesive packaging film 20.

The fourth adhesive film layer 6 is a chemical resistant adhesive film layer, is connected with the battery piece 5, has the same action as the third adhesive film layer 4, ensures the bonding with the battery piece 5 except for a polar group, and simultaneously further protects the battery piece 5 by adding an antioxidant and/or an anticorrosive agent so as to reduce the oxidation and chemical corrosion of a grid line. Preferably, the fourth glue film layer 6 is a polyethylene-polyvinyl acetate copolymer material layer added with an antioxidant and/or an anticorrosive, and the fifth glue film layer 7 is an ethylene-octene copolymer material layer. The fifth adhesive film layer 7 is a damp-heat resistant layer and is arranged on the side of the fourth adhesive film layer 6 far away from the solar cell 5 (i.e. the side close to the back plate/glass), and the function of the fifth adhesive film layer is the same as that of the second adhesive film layer 3, so that the invasion of water vapor and ions is effectively prevented, and the PID resistance and the damp-heat resistance of the module are improved.

The sixth glue film layer 8 is arranged between the fifth glue film layer 7 and the back sheet/glass 9. When photovoltaic module was dual glass assembly, sixth glued membrane layer 8 was the tie coat, and its effect is the same with first glued membrane layer 2, has good cohesiveness, can further promote the cohesiveness through adding coupling agent simultaneously, that is to say or use coupling agent cross-linking type polyethylene-polyvinyl acetate copolymer material layer, reduces the risk of layering.

And when the photovoltaic module is a single glass module, the sixth glue film layer 8 is an anti-ultraviolet glue film layer, which prevents ultraviolet rays from damaging the polymer back plate by adding an ultraviolet absorbent, that is, the sixth glue film layer 8 can be a polyethylene-polyvinyl acetate copolymer material layer dispersed with the ultraviolet absorbent. The specific ultraviolet absorber may be selected from ultraviolet absorbers commonly used in the field of adhesives, and may be modified as needed, and will not be described in detail herein.

The photovoltaic module of the present invention is further described in detail with reference to the following specific embodiments.

Example 1:

in this embodiment, the photovoltaic module is a single glass module, that is to say, the back side is the backplate.

In the present embodiment, as shown in fig. 1, the first adhesive package film 10 includes a first adhesive film layer 2, a second adhesive film layer 3 and a third adhesive film layer 4, and the second adhesive package film 20 includes a fourth adhesive film layer 6, a fifth adhesive film layer 7 and a sixth adhesive film layer 8.

Wherein, the thickness of each adhesive film layer is 0.1 mm.

The first adhesive film layer 2 is a coupling agent crosslinking type EVA material layer; the second adhesive film layer 3 is a POE layer containing a humidity and heat resistant agent; the third adhesive film layer 4 is an EVA layer containing an antioxidant and an anticorrosive.

The fourth adhesive film layer 6 is an EVA layer containing an antioxidant and an anticorrosive agent; the fifth adhesive film layer 7 is a POE layer containing a humidity and heat resistant agent; the sixth adhesive film layer 8 is an EVA layer in which an ultraviolet absorber is dispersed.

In this example, photovoltaic modules can be laminated in the above manner and tested for PID resistance, wet heat cycle (DH1000) resistance.

Example 2:

in this example 2, the thickness of each layer in the multilayer film was 0.5mm, and the rest of the technical solution was the same as that of the above example 1, and the photovoltaic module was pressed in the above manner and subjected to the PID resistance and the damp heat cycle (DH1000) test.

Example 3:

in this example 3, the thickness of the second adhesive film layer 3 and the fifth adhesive film layer 7 is 0.1mm, and the rest technical solutions are the same as the above example 2, and the photovoltaic module is pressed according to the above manner and tested for PID resistance and damp heat cycle (DH 1000).

Example 4:

in this example 4, the thickness of the second adhesive film layer 3 and the fifth adhesive film layer 7 is 0.5mm, and the rest technical solution is the same as that of the above example 1, and the photovoltaic module is pressed according to the above manner and tested for PID resistance and damp heat cycle (DH 1000).

Example 5:

in this example 5, the first adhesive film layer 2 was omitted, the remaining technical solution was the same as that of the above example 1, and the photovoltaic module was fabricated in the above manner and subjected to PID resistance and wet heat cycle (DH1000) test.

Example 6:

in this example 6, the second adhesive film layer 3 was omitted, the remaining technical solution was the same as that of the above example 1, and the photovoltaic module was fabricated in the above manner and subjected to PID resistance and thermal humidity cycle (DH1000) test.

Example 7:

in this example 7, the third adhesive film layer 4 was omitted, the remaining technical solution was the same as that of the above example 1, and the photovoltaic module was fabricated in the above manner and subjected to PID resistance and wet heat cycle (DH1000) test.

Example 8:

in this example 8, the fourth adhesive film layer 6 was omitted, the remaining technical solution was the same as that of the above example 1, and the photovoltaic module was fabricated in the above manner and subjected to PID resistance and wet heat cycle (DH1000) test.

Example 9:

in this example 9, the fifth adhesive film layer 7 was omitted, the remaining technical solution was the same as that of the above example 1, and the photovoltaic module was fabricated in the above manner and subjected to PID resistance and wet heat cycle (DH1000) test.

Example 10:

in this example 10, the sixth adhesive film layer 8 was omitted, the remaining technical solution was the same as that of the above example 1, and the photovoltaic module was fabricated in the above manner and subjected to PID resistance and wet heat cycle (DH1000) test.

Comparative examples 1 to 10:

accordingly, comparative examples 1 to 10 were prepared in one-to-one correspondence with each of the above examples in order to compare the performance of the resulting assembly of the present invention with that of a conventional assembly. In each comparative example, the first and second encapsulant films are EVA, and the thicknesses thereof correspond to the total thickness of the first and second encapsulant films in each example.

The test results for the above examples and comparative examples are shown in tables 1 and 2 below.

TABLE 1 comparison of PID resistance of photovoltaic modules made in the above examples and comparative examples

TABLE 2 comparison of Damp-Heat cycling (DH1000) Performance of photovoltaic modules prepared in the above examples and comparative examples

It can be seen from data in table 1 that the embodiment of the utility model provides a photovoltaic module has obvious promotion than conventional photovoltaic module in the aspect of anti PID effect.

Further, as is apparent from the data in table 2, the moisture and heat resistance of the photovoltaic module provided by the embodiment of the present invention is significantly improved compared with the conventional photovoltaic module.

The above is the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the principle of the present invention, other embodiments extending the package film by increasing or decreasing the number of layers of the package film and changing the sequence of the package film should be considered as the protection scope of the present invention.

Claims

1. A photovoltaic module characterized by being laminated in order from the front side toward the back side: the solar cell comprises front coated glass, a first packaging adhesive film, a cell piece, a second packaging adhesive film and a back plate or glass, wherein at least one of the first packaging adhesive film and the second packaging adhesive film is a multilayer film.

2. The photovoltaic module according to claim 1, wherein the thickness of each layer in the multilayer film is 0.1 to 0.5 mm.

3. The photovoltaic module of claim 1, wherein the first encapsulant film comprises:

the first adhesive film layer is connected with the front coated glass and is an adhesive layer,

and the second adhesive film layer and/or the third adhesive film layer are arranged on one side, close to the battery piece, of the first adhesive film layer, wherein the second adhesive film layer is a heat and humidity resistant layer, and the third adhesive film layer is a chemical resistant adhesive film layer.

4. The photovoltaic module of claim 3, wherein the first adhesive layer is a coupling agent crosslinked polyethylene-polyvinyl acetate copolymer material layer.

5. The photovoltaic module of claim 3, wherein the second glue layer is a layer of ethylene-octene copolymer material.

6. The photovoltaic module of any of claims 3 to 5, wherein the second encapsulant film comprises:

the fourth adhesive film layer is connected with the battery piece and is the chemical-resistant adhesive film layer.

7. The photovoltaic module according to claim 6, wherein the photovoltaic module is a dual glass module, and the second encapsulant film further comprises a fifth film layer and/or a sixth film layer disposed on the side of the fourth film layer away from the cell, wherein the fifth film layer is the heat and humidity resistant layer, and the sixth film layer is the bonding layer.

8. The photovoltaic module according to claim 6, wherein the photovoltaic module is a single glass module, the second encapsulant film further comprises a fifth encapsulant film layer and/or a sixth encapsulant film layer disposed on the side of the fourth encapsulant film layer away from the cell, wherein the fifth encapsulant film layer is the heat and humidity resistant layer, and the sixth encapsulant film layer is an ultraviolet resistant encapsulant film layer.