CN218827176U - Back plate and photovoltaic module - Google Patents

Back plate and photovoltaic module Download PDF

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Publication number
CN218827176U
CN218827176U CN202222508885.9U CN202222508885U CN218827176U CN 218827176 U CN218827176 U CN 218827176U CN 202222508885 U CN202222508885 U CN 202222508885U CN 218827176 U CN218827176 U CN 218827176U
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layer
crosslinked
crosslinking
coating
thickness
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CN202222508885.9U
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郭清明
彭丽霞
许涛
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Canadian Solar Inc
Changshu Tegu New Material Technology CoLtd
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Changshu Tegu New Material Technology CoLtd
Atlas Sunshine Power Group Co Ltd
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Priority to CN202222508885.9U priority Critical patent/CN218827176U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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Abstract

The utility model discloses a backplate and photovoltaic module, the backplate includes: the body comprises at least one of a non-pre-crosslinking layer and a coating and at least two pre-crosslinking layers, wherein the at least two pre-crosslinking layers comprise a pre-crosslinking weather-resistant layer and a pre-crosslinking water-resistant layer which are arranged in a stacked mode, and the non-pre-crosslinking layer or the coating is arranged on one side, far away from the pre-crosslinking weather-resistant layer, of the pre-crosslinking water-resistant layer. According to the utility model discloses a backplate includes in non-crosslinked layer and the coating at least one and two at least crosslinked layers in advance, and the non-crosslinked layer of low melting point in advance crosslinked layer collocation high melting point can avoid the backplate material melting point low, guarantees the high temperature performance of backplate. And two pre-crosslinked layers and a non-pre-crosslinked layer are easy to bond and form, so that the structure of the back plate is more reliable, and the service performance of the back plate is improved.

Description

Back plate and photovoltaic module
Technical Field
The utility model belongs to the technical field of the photovoltaic and specifically relates to a backplate and photovoltaic module are related to.
Background
Photovoltaic backsheets can be classified in a variety of ways, the most common being two, namely coating and composite by manufacturing process, and fluorine-containing and fluorine-free backsheets by structure. The back plate adopted by the traditional photovoltaic module is a three-layer film back plate structure and a double-sided coating back plate structure. The traditional three-layer film layer back plate, such as a three-layer fluorine-containing (TPT/KPF) back plate structure, has the problems of difficult recovery of fluorine-containing materials, high price and the like, and does not suggest popularization from the sustainable development viewpoint. The double-sided coating back plate has the problems of wind and sand resistance, high water permeability and the like. The traditional fluorine-free back plate is formed by adhering and compounding multiple layers of materials such as PET, polyethylene, DNP and the like by using an adhesive. The existing fluorine-free back plate material has the obvious defects that the existing fluorine-free back plate material is not resistant to damp heat, dry heat and high ultraviolet irradiation, so that the use requirements of a commercial crystalline silicon solar cell photovoltaic module in the environments of damp heat, dry heat, ultraviolet and the like cannot be met, and the compatibility of the back plate material during extrusion molding is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the problem that exists among the prior art at least. To this end, an object of the present invention is to provide a backsheet having at least two pre-crosslinked layers with high weatherability.
Another object of the utility model is to provide a photovoltaic module, photovoltaic module includes the backplate.
According to the utility model discloses backplate of first aspect embodiment includes: the body comprises at least one of a non-pre-crosslinking layer and a coating and at least two pre-crosslinking layers, wherein the at least two pre-crosslinking layers comprise a pre-crosslinking weather-resistant layer and a pre-crosslinking water-resistant layer which are arranged in a stacked mode, and the non-pre-crosslinking layer or the coating is arranged on one side, far away from the pre-crosslinking weather-resistant layer, of the pre-crosslinking water-resistant layer.
According to the utility model discloses specific embodiment's backplate includes in non-pre-crosslinked layer and the coating at least one and two at least pre-crosslinked layers, and the non-pre-crosslinked layer of high melting point of low melting point collocation pre-crosslinked layer can avoid the backplate material melting point low, guarantees the high temperature performance of backplate. And two pre-crosslinked layers and a non-pre-crosslinked layer are easy to bond and form, so that the structure of the back plate is more reliable, and the service performance of the back plate is improved.
According to some embodiments of the invention, the non-pre-crosslinked layer is a fluorine-containing film layer or a non-fluorine film layer.
According to some embodiments of the invention, the non-fluorine film layer is a PET layer, a PP layer or a PE layer.
According to some embodiments of the invention, the thickness of the non-pre-crosslinked layer is d 5 Wherein, d is 5 Satisfies the following conditions: d is not less than 10 mu m 5 ≤100μm。
According to some embodiments of the invention, the coating is a fluorine-containing coating or a non-fluorine-containing coating.
According to some embodiments of the invention, the coating has a thickness d 3 Wherein, d is 3 Satisfies the following conditions: d is not less than 10 mu m 3 ≤50μm。
According to some embodiments of the invention, the thickness of the back plate is d 6 Wherein d is 6 Satisfies the following conditions: d is more than or equal to 500 mu m 6 Less than or equal to 800 mu m; preferably, d is 6 Satisfies the following conditions: d 6 ＝600μm。
According to the utility model discloses a backplate of some embodiments still includes: a pre-crosslinked adhesive layer disposed on a side of the at least one of the non-pre-crosslinked layer and the coating layer distal from the pre-crosslinked weathering layer.
According to some embodiments of the invention, the thickness of the pre-crosslinked adhesive layer is d 4 Wherein d is 4 Satisfies the following conditions: d is not less than 5 mu m 4 ≤20μm。
According to some embodiments of the invention, the thickness of the pre-crosslinked weathering layer is d 1 Wherein d is 1 Satisfies the following conditions: d is not more than 50 mu m 1 ≤300μm。
According to some embodiments of the invention, the thickness of the pre-crosslinked water-resistant layer is d 2 WhereinD is said 2 Satisfies the following conditions: d is not less than 100 mu m 2 ≤400μm。
According to some embodiments of the invention, the at least two pre-crosslinked layers are an integral co-extruded part.
According to the utility model discloses photovoltaic module of second aspect embodiment, including the aforesaid according to the utility model discloses the first aspect embodiment the backplate.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a back plate according to an embodiment of the present invention.
Reference numerals are as follows:
100: a back plate;
1: pre-crosslinking a water-resistant layer;
2: a pre-crosslinked weatherable layer;
3: a non-pre-crosslinked layer;
4: pre-crosslinking the adhesive layer.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
A backplate 100 according to an embodiment of the present invention is described below with reference to fig. 1.
The backsheet 100 according to an embodiment of the first aspect of the present invention, as shown in fig. 1, comprises a body including at least one of a non-pre-crosslinked layer 3 and a coating, and at least two pre-crosslinked layers. The crosslinking mode of the pre-crosslinking layer is one or more modes of electron beam irradiation crosslinking, silane crosslinking and ultraviolet crosslinking.
Specifically, the back plate 100 of the embodiment of the present invention may include the following three cases: first, backplate 100 includes non-crosslinked layer 3, coating and two at least pre-crosslinked layers, and therefore, the low melting point of backplate 100 material can be avoided to the pre-crosslinked layer of low melting point to match non-pre-crosslinked layer 3 of high melting point, guarantees the high temperature performance of backplate 100. While the coating can further enhance the weatherability and mechanical strength of the backsheet 100. Second, the backsheet 100 comprises a coating and at least two pre-crosslinked layers. Therefore, the low-melting-point pre-crosslinked layer can be matched with the coating with a higher melting point to prevent the melting point of the material of the back plate 100 from being low, and the high-temperature performance of the back plate 100 is ensured. The backsheet 100 comprises a non-pre-crosslinked layer 3 and at least two pre-crosslinked layers. Therefore, the low-melting-point pre-crosslinked layer is matched with the high-melting-point non-pre-crosslinked layer 3, so that the low melting point of the material of the back plate 100 can be avoided, and the high-temperature performance of the back plate 100 is ensured. And the two pre-crosslinking layers and the non-pre-crosslinking layer 3 are easy to bond and form, so that the structure of the back plate 100 is more reliable.
Wherein, at least two pre-crosslinking layers comprise a pre-crosslinking weather-resistant layer 2 and a pre-crosslinking water-resistant layer 1 which are arranged in a laminated manner. Thus, the pre-crosslinked weather-resistant layer 2 can improve the weather resistance of the backsheet 100, for example, the corrosion resistance and the ultraviolet radiation resistance of the backsheet 100, and the backsheet 100 can be applied to environments with damp heat and strong ultraviolet radiation. The pre-crosslinked water-blocking layer 1 can improve the water-blocking performance of the back sheet 100, and can improve the adaptability of the back sheet 100 to high-humidity and high-temperature environments.
Among them, the pre-crosslinked weather-resistant layer 2 and/or the pre-crosslinked water-blocking layer 1 may be selected from a resin composition film layer, for example, the radiation pre-crosslinked ethylene-vinyl acetate resin film of example 1 in the patent application publication No. CN103804774A, but is not limited thereto.
Further, a non-pre-crosslinked layer 3 or coating is provided on the side of the pre-crosslinked water-resistant layer 1 remote from the pre-crosslinked weathering layer 2. When the backsheet 100 comprises a coating layer and a non-pre-crosslinked layer, the coating layer is provided on the side of the non-pre-crosslinked layer remote from the pre-crosslinked weathering layer 2. So, the utility model discloses a backplate 100 is used for forming photovoltaic module, and the adhesion between backplate 100 and the encapsulation glued membrane strengthens, improves backplate 100's reliability.
According to the utility model discloses specific embodiment's backplate 100 includes in non-crosslinked layer 3 and the coating at least one and two at least pre-crosslinked layers, and the non-pre-crosslinked layer 3 of the high melting point of low melting point of pre-crosslinked layer collocation can avoid backplate 100 material melting point low, guarantees backplate 100's high temperature performance. And two pre-crosslinked layers and the non-pre-crosslinked layer 3 are easy to bond and form, so that the structure of the back plate 100 is more reliable, and the service performance of the back plate 100 is improved.
According to some embodiments of the present invention, the non-pre-crosslinked layer 3 is a fluorine-containing film layer or a non-fluorine film layer. When the non-pre-crosslinked layer 3 is a fluorine-containing film layer, the film has a higher melting point and a higher weather resistance, so that the weather resistance of the back sheet 100 can be further improved. When the non-pre-crosslinked layer 3 is a non-fluorine film layer, the non-fluorine film layer is cheap and easy to obtain, and has a high melting point.
According to some embodiments of the present invention, the non-fluorine film layer is a PET (Polyethylene terephthalate) layer, a PP (Polypropylene) layer or a PE (Polyethylene) layer. Therefore, the non-fluorine film layer has high melting point, wide source, low price and easy obtaining.
According to some embodiments of the present invention, the thickness of the non-pre-crosslinked layer 3 is d 5 Wherein d is 5 Satisfies the following conditions: d is not less than 10 mu m 5 Less than or equal to 100 mu m. Thus, when d 5 When the thickness of the non-pre-crosslinked layer 3 is less than 10 μm, the adhesive force of the backsheet 100 may be small, and the melting point of the backsheet 100 may be low, so that the reliability and high temperature performance of the backsheet 100 may be poor. When d is 5 Above 100 μm, the thickness of the non-pre-crosslinked layer 3 is large, which may result in an excessive thickness of the backsheet 100, thereby increasing the production cost of the backsheet 100. Thus, d is set 5 D is more than or equal to 10 mu m 5 Less than or equal to 100 mu m, which not only can ensure the high temperature performance and the bonding force of the back plate 100, but also can save the cost.
According to some embodiments of the invention, the coating is a fluorine-containing coating or a non-fluorine-containing coating. Thus, when the coating is a fluorine-containing coating, the coating has better weather resistance and adhesion performance with an encapsulating adhesive film such as an EVA film. When the coating is a non-fluorine coating, the raw material of the coating is cheap, easy to recycle, environment-friendly and economical.
According to some embodiments of the invention, the coating has a thickness ofd 3 Wherein d is 3 Satisfies the following conditions: d is not less than 10 mu m 3 Less than or equal to 50 mu m. Thus, when d 3 Less than 10 μm, the coating layer has a small thickness, the weather resistance and mechanical strength of the coating layer may be small and the coating layer is easily peeled, resulting in easy penetration of moisture into the backsheet 100. As such, the rear panel 100 may have poor weather resistance and mechanical strength. When d is 3 Above 50 μm, the thickness of the coating layer is large, which may result in an excessive thickness of the rear plate 100, thereby increasing the production cost of the rear plate 100. Thus, d is set 3 D is more than or equal to 10 mu m 3 Less than or equal to 50 mu m, thereby not only ensuring the weather resistance and the mechanical strength of the back plate 100, but also saving the cost.
According to some embodiments of the present invention, the thickness of the back plate 100 is d 6 Wherein d is 6 Satisfies the following conditions: d is more than or equal to 500 mu m 6 Less than or equal to 800 mu m. Thus, when d 6 When less than 500 μm, the thickness of the back sheet 100 is small, and the weather resistance and mechanical strength of the back sheet 100 may be poor. When d is 6 Above 800 μm, the thickness of the back sheet 100 is large, which may result in an excessive thickness of the back sheet 100, thereby increasing the production cost of the back sheet 100. Thus, d is set 6 D is more than or equal to 500 mu m 6 Less than or equal to 800 microns, can ensure the weather resistance and the mechanical strength of the back plate 100 and can save the cost. Further, the utility model discloses specific embodiment's backplate 100, at least one in non-pre-crosslinked layer 3 and the coating and the range upon range of setting of at least two pre-crosslinked layers, when guaranteeing backplate 100 weatherability, mechanical strength and high temperature performance, reduced backplate 100's thickness, practiced thrift the cost.
According to some optional embodiments of the invention, d 6 Satisfies the following conditions: d 6 =600 μm. Therefore, the utility model discloses specific embodiment's 100 thicknesses of backplate are more suitable, and backplate 100's weatherability is strong, mechanical strength is high, high temperature performance is excellent, and backplate 100's thickness is less simultaneously.
According to the utility model discloses a backplate 100 of some embodiments still includes: and the pre-crosslinking adhesive layer 4 is arranged on one side of at least one of the non-pre-crosslinking layer 3 and the coating layer far away from the pre-crosslinking weather-resistant layer 2. Thus, on the one hand, the adhesion ability and weather resistance of the rear panel 100 can be further improved, and on the other hand, the mechanical strength and support performance of the rear panel 100 are increased. The pre-crosslinked adhesive layer 4 may be selected from adhesive composition layers, for example, black flame-retardant adhesive film layers of any one of examples 1 to 3 in patent application publication No. CN113150721A, but is not limited thereto.
According to some embodiments of the present invention, the thickness of the pre-crosslinked adhesive layer 4 is d 4 Wherein d is 4 Satisfies the following conditions: d is not less than 5 mu m 4 Less than or equal to 20 mu m. Thus, when d 4 When the thickness of the pre-crosslinked adhesive layer 4 is smaller than 5 μm, the adhesive force and mechanical strength of the pre-crosslinked adhesive layer 4 may be smaller, and thus, the reliability and mechanical strength of the back sheet 100 may be poor. When d is 4 Above 20 μm, the thickness of the pre-crosslinked adhesive layer 4 is large, which may result in an excessive thickness of the backsheet 100, thereby increasing the production cost of the backsheet 100. Thus, d is set 4 D is less than or equal to 10 mu m 4 Less than or equal to 20 mu m, thereby not only ensuring the weather resistance and the mechanical strength of the back plate 100, but also saving the cost.
According to some embodiments of the present invention, the thickness of the pre-crosslinked weathering layer 2 is d 1 Wherein d is 1 Satisfies the following conditions: d is not less than 50 mu m 1 Less than or equal to 300 mu m. Thus, when d 1 Less than 50 μm, the thickness of the pre-crosslinked weather-resistant layer 2 is small, the weather resistance of the pre-crosslinked weather-resistant layer 2 may be small, and thus, the weather resistance of the backsheet 100 may be poor. When d is 1 Above 300 μm, the thickness of the coating layer is large, which may result in an excessive thickness of the rear plate 100, thereby increasing the production cost of the rear plate 100. Thus, d is set 3 D is more than or equal to 50 mu m 1 Less than or equal to 300 mu m, thereby not only ensuring the weather resistance of the back plate 100, but also saving the cost.
According to some embodiments of the present invention, the thickness of the pre-crosslinked water-resistant layer 1 is d 2 Wherein d is 2 Satisfies the following conditions: d is not less than 100 mu m 2 Less than or equal to 400 mu m. Thus, when d 2 When the thickness of the pre-crosslinked water-blocking layer 1 is smaller than 100 μm, the water-blocking property and the supporting property of the pre-crosslinked water-blocking layer 1 may be poor, and thus, the water-blocking property and the supporting property of the back sheet 100 may be poorThe support performance may also be poor. When d is 2 Above 400 μm, the thickness of the pre-crosslinked water-blocking layer 1 is large, which may result in an excessive thickness of the backsheet 100, thereby increasing the production cost of the backsheet 100. Thus, d is set 2 D is more than or equal to 100 mu m 2 Less than or equal to 400 mu m, thereby not only ensuring the weather resistance and the mechanical strength of the back plate 100, but also saving the cost.
According to some embodiments of the present invention, the at least two pre-crosslinked layers are an integral co-extruded part. Thus, the back plate 100 has a simple manufacturing process and a stable structure of the back plate 100.
According to some optional embodiments of the utility model, the resistant layer 2 of pre-crosslinking, the waterproof layer 1 of pre-crosslinking and non-pre-crosslinking layer 3 and pre-crosslinking adhesive linkage 4 bond the shaping in proper order.
According to other alternative embodiments of the invention, the coating is applied in connection with the non-pre-crosslinked layer 3.
According to the utility model discloses second aspect embodiment photovoltaic module, include according to the utility model discloses the backplate 100 of first aspect embodiment.
According to the utility model discloses photovoltaic module, the weatherability is strong, the water blocking performance is good, and the reliability is high.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. A backing sheet, comprising:
the body comprises at least one of a non-pre-crosslinking layer and a coating and at least two pre-crosslinking layers, wherein the at least two pre-crosslinking layers comprise a pre-crosslinking weather-resistant layer and a pre-crosslinking water-resistant layer which are arranged in a stacked mode, and the non-pre-crosslinking layer or the coating is arranged on one side, far away from the pre-crosslinking weather-resistant layer, of the pre-crosslinking water-resistant layer.
2. The backsheet according to claim 1, wherein the non-pre-crosslinked layer is a fluorine-containing film layer or a non-fluorine film layer.
3. The backsheet according to claim 2, wherein the non-fluorine film layer is a PET layer, a PP layer or a PE layer.
4. The backsheet according to claim 1, wherein the non-pre-crosslinked layer has a thickness d 5 Wherein, d is 5 Satisfies the following conditions: d is not less than 10 mu m 5 ≤100μm。
5. The backsheet according to claim 1, wherein the coating is a fluorine-containing coating or a non-fluorine-containing coating.
6. The backing sheet of claim 1 wherein the coating has a thickness d 3 Wherein d is 3 Satisfies the following conditions: d is not less than 10 mu m 3 ≤50μm。
7. A backplate according to claim 1 in which the backplate has a thickness d 6 Wherein d is 6 Satisfies the following conditions: d is more than or equal to 500 mu m 6 ≤800μm。
8. The backsheet according to claim 7, wherein d is 6 Satisfies the following conditions: d 6 ＝600μm。
9. The backsheet according to claim 1, further comprising:
a pre-crosslinked adhesive layer disposed on a side of the at least one of the non-pre-crosslinked layer and the coating layer distal from the pre-crosslinked weathering layer.
10. The backsheet according to claim 9, wherein the pre-crosslinked adhesive layer has a thickness d 4 Wherein d is 4 Satisfies the following conditions: d is not less than 5 mu m 4 ≤20μm。
11. The backsheet according to claim 1, wherein said pre-crosslinked weatherable layer has a thickness d 1 Wherein d is 1 Satisfies the following conditions: d is not less than 50 mu m 1 ≤300μm。
12. The backing sheet of claim 1 wherein the pre-crosslinked water-resistant layer has a thickness d 2 Wherein d is 2 Satisfies the following conditions: d is not less than 100 mu m 2 ≤400μm。
13. A backsheet according to any one of claims 1-12, wherein the at least two pre-crosslinked layers are one-piece co-extruded parts.
14. A photovoltaic module comprising a backsheet according to any one of claims 1 to 13.
CN202222508885.9U 2022-09-21 2022-09-21 Back plate and photovoltaic module Active CN218827176U (en)

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Application Number Priority Date Filing Date Title
CN202222508885.9U CN218827176U (en) 2022-09-21 2022-09-21 Back plate and photovoltaic module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222508885.9U CN218827176U (en) 2022-09-21 2022-09-21 Back plate and photovoltaic module

Publications (1)

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CN218827176U true CN218827176U (en) 2023-04-07

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