CN219017669U

CN219017669U - High-light-transmission and water vapor-permeation-resistant photovoltaic module

Info

Publication number: CN219017669U
Application number: CN202221036413.1U
Authority: CN
Inventors: 汤嘉鸿; 王伟力; 施亦宁; 朱玺; 谢涛涛; 施正荣
Original assignee: Sunman Shanghai Co ltd; Shangmai Zhenjiang New Energy Technology Co ltd
Current assignee: Sunman Shanghai Co ltd; Shangmai Zhenjiang New Energy Technology Co ltd
Priority date: 2022-05-04
Filing date: 2022-05-04
Publication date: 2023-05-12
Anticipated expiration: 2032-05-04

Abstract

The utility model discloses a high-light-transmission and water vapor-transmission-resistant photovoltaic module, which comprises a packaging substrate, wherein a water-blocking vapor deposition film is integrally arranged on at least 1 outer surface of the packaging substrate through vapor deposition; the photovoltaic packaging layer provided by the utility model has excellent light transmission and water vapor transmission resistance performance, is favorable for pushing the technical level of packaging the photovoltaic module on water vapor transmission resistance, can be used for solving the technical problems of the photovoltaic module in a high-humidity installation environment, and overcomes the flexible packaging difficulty of the photovoltaic module with high sensitivity to water vapor.

Description

High-light-transmission and water vapor-permeation-resistant photovoltaic module

Technical Field

The utility model belongs to the field of photovoltaic power generation, and particularly relates to a photovoltaic packaging layer with high light transmission and water vapor transmission resistance.

Background

Reliability, safety and low cost are all requirements that any energy product must meet at the same time. The photovoltaic industry has been focusing on development to improve photoelectric conversion efficiency continuously and with high quality over the last several decades, and major means such as localization and automation of supply chains and production facilities have reduced the cost of photovoltaic products by a factor of 300 in the last 40 years. Of course, these last decades have been very significant and effective in reducing the cost of photovoltaic cells almost to a premium, both at the limits of conversion efficiency and at the production scale effects, which are about to suffer from bottlenecks, and therefore photovoltaic module products require further technical innovation.

On the one hand, the applicant notes that the price of the photovoltaic cell is far higher than that of the packaging structure of the photovoltaic module in twenty years ago, and the original photovoltaic module product has to use heavy glass, thick aluminum frames and other packaging structures to carefully care the gold-like photovoltaic cell so as to exert the power generation function of the photovoltaic cell to the greatest extent. However, as the photovoltaic cell is extremely low in cost through technical innovation for decades, the cost structure distribution of the cell and the packaging material in the photovoltaic module product is reversely changed, and the cost of the packaging material is higher than that of the cell, that is, the cell is relatively low in cost, so that new photovoltaic module cell structure technologies such as double-sided, half-sided, shingle and the like are present at present, and the maximum packaging material utilization rate is striven for through the structure. People become "cherish" of the packaging material from "caring for batteries".

On the other hand, in some specific application scenarios of the photovoltaic module, the photovoltaic module is required to have excellent water vapor permeability and simultaneously meet good light transmittance; specifically, in order to meet the requirement of the severe waterproof vapor permeation effect of the heterojunction HJT photovoltaic module, double-sided glass is generally adopted for packaging, the whole packaging weight is heavy, the bending resistance is poor, and the flexible mounting effect is very unfavorable; the perovskite, cadmium telluride, copper indium selenium and other types of thin film photovoltaic components are very sensitive to water vapor, and power generation work in a high-humidity environment can be obviously attenuated, so that the power generation efficiency is low, and therefore the thin film photovoltaic components are difficult to apply in a high-humidity installation environment.

In addition, in order to effectively utilize water surface resources and save land installation occupation area, the prior art has proposed to adopt a water surface photovoltaic installation scheme, and simultaneously a photovoltaic module in the water surface photovoltaic installation scheme is close to water surface installation, and can also rely on water heat dissipation to reduce the working temperature and improve the generated energy of the photovoltaic module, so that the market prospect of the water surface photovoltaic installation scheme is widely seen. However, most of photovoltaic modules adopted in the current water surface photovoltaic modules adopt typical glass packaging photovoltaic modules, and the bending resistance is poor, so that the wind wave resistance is poor, and the heat dissipation effect when the photovoltaic modules are arranged on a bracket is poor; there are individual proposals to employ thin film photovoltaic modules, which, as described above, are very sensitive to moisture, resulting in low power generation efficiency for their application in a water-surface photovoltaic environment.

Therefore, the applicant decides to conduct a targeted innovative study on the problem, and seeks a new photovoltaic module packaging scheme to solve the technical difficulty faced by the current photovoltaic module in a high-humidity installation environment or the flexible packaging difficulty faced by the photovoltaic module with high sensitivity to water vapor.

Disclosure of Invention

In view of the above, the utility model aims to provide a high-light-transmission and water vapor transmission-resistant photovoltaic packaging layer and a photovoltaic module thereof, which have excellent light transmission and water vapor transmission-resistant performance, are beneficial to advancing the technical level of packaging the photovoltaic module on water vapor transmission resistance, can be used for solving the technical problems of the photovoltaic module in a high-humidity installation environment, and simultaneously overcome the flexible packaging difficulty of the photovoltaic module with high sensitivity to water vapor.

Before the technical scheme of the application is proposed, the applicant researches the current development situation of the barrier film of the photovoltaic module in the prior art, and discovers that the barrier film is mostly made of thermoplastic polymers with excellent water vapor permeability, and the typical material adopted is PET, however, the water vapor permeability level is still limited, the packaging requirement of the photovoltaic module of a specific type which is very sensitive to water vapor cannot be met, the barrier film is difficult to apply in a high-humidity installation environment for a long time, and the problem of light reflection cannot be avoided; on the other hand, in order to reduce the reflection problem existing in the light receiving surface packaging layer and cause light loss, in order to increase the effective light quantity, the prior art proposes to provide an antireflection film layer on the front surface of the glass packaging photovoltaic module, and the applicant also proposes to provide an antireflection layer (patent application number: 202123047318. X) on the front flexible packaging layer of the photovoltaic module, wherein the antireflection layers are obtained by coating an antireflection film liquid on the outer surface of the front surface packaging layer of the photovoltaic module and then performing heat curing molding, and the light transmission effect of the photovoltaic module is further increased by reducing light reflection, however, the antireflection layers cannot achieve high-level waterproof vapor permeability performance. The applicant finally proposes the following technical scheme of the application based on years of concentrated innovative research in the field of photovoltaic packaging.

The technical scheme adopted by the utility model is as follows:

a high-light-transmission and water vapor-transmission-resistant photovoltaic packaging layer comprises a packaging substrate, wherein a water-blocking vapor deposition film is integrally arranged on at least 1 outer surface of the packaging substrate through vapor deposition.

Preferably, the thickness of the water-blocking vapor deposition film ranges from 10 nm to 500nm.

Preferably, the thickness of the water-blocking vapor deposition film ranges from 50nm to 300nm.

Preferably, the material of the water-blocking vapor deposition film adopts light-transmitting inorganic oxide or light-transmitting inorganic nitride.

Preferably, the material of the water-blocking vapor deposition film adopts aluminum oxide or silicon dioxide or silicon nitride.

Preferably, the package substrate is glass or a flexible substrate.

Preferably, the flexible substrate employs a thermoplastic polymer or a fiber reinforced thermosetting powder coating.

Preferably, the water-blocking vapor deposition film is manufactured by physical vapor deposition or chemical vapor deposition.

Preferably, the high-light-transmission and water vapor-transmission-resistance photovoltaic module comprises a light-transmission front plate, a battery piece and a back plate which are laminated and compounded into a whole; wherein, the light-transmitting front plate and/or the back plate adopt the photovoltaic packaging layer.

Preferably, the battery piece is a crystalline silicon battery piece or an amorphous silicon film battery piece; and/or the cell is a homojunction cell or a heterojunction HJT cell; and/or the battery piece is a single-sided battery piece or a double-sided battery piece.

It should be specifically noted that the deposited film thickness data referred to throughout this application are obtained according to the GB/T13452.2-2008 standard test; the water vapor transmittance data is obtained according to GB/T31034-2014 standard test; the light transmittance data are obtained according to the ISO9050-2003 standard test; the bending resistance data are obtained according to an internal enterprise standard test formulated by the applicant.

The applicant has surprisingly found that the vapor deposition film structure has outstanding excellent waterproof vapor permeability, and has surprisingly found that the vapor deposition film can generate a reflected light interference effect on the surface of the vapor deposition film, so that the reflected light loss of the packaging layer can be effectively reduced.

Drawings

FIG. 1 is a schematic layer structure of a photovoltaic module according to an embodiment of the present utility model;

FIG. 2 is a top view of a water surface photovoltaic mounting structure in example 12 of this utility model;

FIG. 3 is a schematic cross-sectional view of FIG. 2;

FIG. 4 is a top view of a water surface photovoltaic mounting structure of embodiment 13 or 14 or 15 of the present utility model;

FIG. 5 is a schematic cross-sectional view of a water surface photovoltaic mounting structure in example 13 of the present utility model;

FIG. 6 is a schematic cross-sectional view of a water surface photovoltaic mounting structure of embodiment 14 or 15 of the present utility model;

fig. 7 is a schematic cross-sectional view of a photovoltaic encapsulation layer in example 1 or 2 or 3 of the present utility model.

Detailed Description

The embodiment of the utility model discloses a high-light-transmission and water vapor-transmission-resistant photovoltaic packaging layer, which comprises a packaging substrate, wherein a water-blocking vapor deposition film is integrally arranged on at least 1 outer surface of the packaging substrate through vapor deposition; since the other surface of the encapsulation substrate is located inside the photovoltaic module at the time of the subsequent lamination application of the photovoltaic module, it is recommended that the water-blocking vapor-deposited film be provided only on 1 outer surface of the encapsulation substrate at the time of the specific implementation. Of course, in order to meet the specific application requirements, in other embodiments of the present application, it is of course also possible to select to integrally provide the water-blocking vapor-deposited films on both surfaces of the package substrate through vapor deposition, respectively.

In order to facilitate obtaining a better anti-reflection effect of the photovoltaic module and ensure the reliability of the water vapor permeability of the photovoltaic module, preferably, in the embodiment, the thickness range of the water-blocking vapor deposition film is 10-500nm, more preferably 30-500nm, and even more preferably 55-500nm.

In order to further improve and reduce the loss of the surface reflected light, preferably, in the present embodiment, the thickness range of the water-blocking vapor deposition film is 50-300nm, more preferably 80-250nm, still more preferably 100-200nm, which can be used to enhance the interference effect of the reflected light of the photovoltaic module on the light receiving surface thereof and reduce the loss of the reflected light; in practice, the applicant suggests that the thickness of the water-blocking vapor-deposited film can be used in combination with the material of the water-blocking vapor-deposited film and with reference to its interference effect on reflected light, which is not described in detail in this example; of course, when the photovoltaic packaging layer has no light transmittance requirement, the thickness of the corresponding water-blocking vapor deposition film can be increased according to actual needs, and the reliability of water vapor permeability resistance is further improved.

Preferably, in the present embodiment, the material of the water-blocking vapor deposition film adopts a light-transmitting inorganic oxide or a light-transmitting inorganic nitride; further preferably, the material of the water-blocking vapor deposition film adopts alumina or silicon dioxide or silicon nitride; it should be noted that, in other embodiments, those skilled in the art may implement the present application using other suitable light-transmitting inorganic oxides or light-transmitting inorganic nitrides having similar effects, and it is expected that similar technical effects may be obtained, and these implementation variations fall within the scope of the present application.

Preferably, in this embodiment, the package substrate may be glass, for increasing light transmittance when the glass is packaged, and by detecting that the water-blocking vapor deposition film is further formed on the glass in the wavelength range of 380-1100nm, it is expected that the light transmittance can be increased by 2-5%; of course, a flexible substrate is preferable; the flexible substrate can be made of thermoplastic polymer or fiber reinforced thermosetting powder coating, and can also be made of other known flexible composite materials; wherein, the fiber reinforced thermoplastic polymer can specifically adopt a continuous fiber reinforced composite thermoplastic polymer; further, the thermoplastic polymer in the present embodiment may be specifically PET (polycondensate of terephthalic acid and ethylene glycol), TPO (thermoplastic polymer of polyolefin type), PP (polypropylene), PC (polycarbonate), PMMA (polymethyl methacrylate), PE (polyethylene), PS (polystyrene), PVC (polyvinyl chloride), ABS (acrylonitrile butadiene styrene) copolymer or a fluorine film material, or may be a mixture of these materials; the continuous fibers in the present embodiment may be glass fibers, carbon fibers, natural fibers (for example, hemp fibers, bamboo fibers, etc.), basalt fibers, carbon fibers, aramid fibers, or other known fibers, or mixed fibers of these fibers; the thermosetting coating material in this embodiment may be a thermosetting coating material powder coating material or a thermosetting liquid coating material, preferably a thermosetting coating material powder coating material, particularly preferably a thermosetting coating material powder coating material which may be an acrylic powder coating material, a polyester (including polyurethane) powder coating material, an epoxy resin powder, a fluorocarbon powder coating material or other known powder coating materials, and a mixed powder coating material of these powder coating materials; particularly preferably, the continuous fiber reinforced composite thermoplastic polymer may be referred to directly as CN201921204030.9; the thermosetting coating composite fiber cloth can be directly referred to as CN201610685536.0, CN201610685240.9 and CN201610927464.6.

Preferably, in the present embodiment, the water-blocking vapor deposition film is manufactured by physical vapor deposition or chemical vapor deposition; further preferably, in this embodiment, the physical vapor deposition may specifically use vacuum evaporation plating, vacuum sputtering plating, vacuum ion plating or other known physical vapor deposition methods, and the chemical vapor deposition may specifically use PECVD or ALD atomic layer deposition or other known chemical vapor deposition methods; the present application is not particularly limited thereto, and may refer directly to known chemical deposition techniques to ensure the maturity of the manufacturing process route employed in the present application.

Preferably, in the present embodiment, the water vapor permeability of the water-blocking vapor deposition film is 0.2g/m or less ² 24h, and the light transmittance of the film in the wavelength range of 380-1100nm is not lower than 90%, which is obviously superior to the conventional water-blocking film or antireflection film, and the water-blocking vapor deposition film is not an independent layer structure, so that the film is prefabricated on a packaging layer corresponding to the film during testing, and then the packaging layer is subjected to relevant data representation obtained after targeted testing.

Preferably, the embodiment also provides a high-light-transmission and water vapor transmission resistant photovoltaic module, which comprises a light-transmission front plate, a battery piece and a back plate which are laminated and compounded into a whole; wherein the light-transmitting front plate and/or the back plate adopt the photovoltaic packaging layer described above in this embodiment; preferably, in the present embodiment, the light is transmittedThe front plate and the back plate both adopt the photovoltaic packaging layer described above in the present embodiment; more preferably, in order to improve the flexible mounting effect of the photovoltaic module, in this embodiment, the package substrates used in the transparent front plate and the back plate are all the flexible substrates described in this embodiment, so that the obtained photovoltaic module has excellent flexible mounting effect (the bending resistance is up to 10 ten thousand times or more, the bending resistance test is performed according to the internal enterprise standard set by the applicant), and the package weight is light (the package weight thereof is generally not more than 3.5 Kg/m) ² ) Is obviously superior to a photovoltaic module packaged by glass.

Since the embodiment of the application proposes a water-blocking vapor deposition film structure with outstanding excellent water vapor permeability and anti-reflection effect, preferably, in the present embodiment, the battery sheet used may be a crystalline silicon battery sheet, or may be an amorphous silicon thin film battery sheet (sensitive to water vapor permeability); the adopted battery piece can be a homojunction battery piece, a heterojunction HJT battery piece (very sensitive to water vapor permeation) and other battery pieces with other structures very sensitive to water vapor permeation; the adopted battery piece can be a single-sided battery piece or a double-sided battery piece, wherein when the battery piece is a double-sided battery piece, the backboard is used as a light receiving surface at the same time, the flexible backboard can refer to the implementation scheme of the flexible light-transmitting front board, the backboard water-blocking vapor deposition film can also refer to the related parameter specification of the front board water-blocking vapor deposition film, the anti-reflection effect is further improved, and the anti-reflection effect is a conventional technical means which can be made by a person skilled in the art based on the description of the application.

Preferably, the photovoltaic module of the embodiment is very suitable for being installed and applied on water surface or in other high-humidity installation environments.

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Example 1: on the basis of the above embodiment, please refer to fig. 7, a high light-transmission and water vapor-transmission resistant photovoltaic packaging layer comprises a packaging substrate a, wherein the packaging substrate a adopts an acrylic powder coating composite glass fiber cloth, and the thickness is about 0.7mm; a water-blocking vapor deposition film B (the deposition material of which adopts alumina) is integrally arranged on 1 outer surface of the packaging substrate A by a vacuum evaporation coating method, and the thickness is about 150nm.

Example 2: on the basis of the above embodiment, please refer to fig. 7 as well, a high light-transmission and water vapor-transmission resistant photovoltaic packaging layer comprises a packaging substrate a, wherein the packaging substrate a adopts a glass fiber reinforced PP thermoplastic polymer unidirectional tape lamination structure, and the thickness is about 2mm; and a water-blocking vapor deposition film B (silicon dioxide is adopted as a deposition material) is integrally arranged on 1 outer surface of the packaging substrate A by a PECVD method, and the thickness is about 450nm.

Example 3: the technical solution of this embodiment 3 is the same as that of embodiment 1 or 2, except that as shown in fig. 7, in this embodiment 3, the package substrate a is made of glass.

Example 4: the photovoltaic module 1 with high light transmission and water vapor transmission resistance comprises a flexible light transmission front plate 10, a battery piece 20 and a flexible back plate 30 which are laminated and compounded into a whole; wherein the flexible light-transmitting front plate 10 adopts the photovoltaic packaging layer as described in embodiment 1, the battery piece 20 adopts a single-sided crystalline silicon battery piece, and the flexible back plate 30 adopts the photovoltaic packaging layer as described in embodiment 2.

Example 5: the remaining technical solutions of this embodiment 5 are the same as those of embodiment 4, except that in this embodiment 5, the deposition materials of the photovoltaic packaging layers in embodiment 1 and embodiment 2 are replaced with silicon nitride.

Example 6: the rest of the technical solutions in this embodiment 6 are the same as those in embodiment 4, except that in this embodiment 6, the battery piece is a double-sided crystalline silicon battery piece, and the flexible back sheet is the same as the photovoltaic packaging layer described in embodiment 1.

Example 7: the rest of the technical solutions in this embodiment 7 are the same as those in embodiment 4, except that in this embodiment 7, the packaging substrates of the photovoltaic packaging layers in embodiments 1 and 2 are replaced with PET boards, and the thickness is about 0.5mm.

Example 8: the rest of the technical solutions in this embodiment 8 are the same as those in embodiment 4, except that in this embodiment 8, the packaging substrates of the photovoltaic packaging layers in embodiments 1 and 2 are replaced with TPO boards, and the thickness is about 0.3mm.

Example 9: the other technical solutions of this embodiment 9 are the same as embodiment 4, except that in this embodiment 9, a single-sided heterojunction HJT battery is used as the battery.

Example 10: the other technical solutions of this embodiment 10 are the same as embodiment 4, except that in this embodiment 10, a single-sided perovskite thin film battery piece is used as the battery piece.

Example 11: the remaining technical solutions of this embodiment 11 are the same as those of embodiment 4, except that in this embodiment 11, a single-sided cadmium telluride thin film battery is used as the battery sheet.

Example 12: the embodiment 12 proposes a water surface photovoltaic installation structure, referring to fig. 2 and 3, including a plurality of photovoltaic modules installed on a waterproof membrane material 2a, wherein the waterproof membrane material 2a is installed and connected with a water surface floating body 3; wherein the photovoltaic module adopts the photovoltaic module 1 described in one of the above embodiments 4 to 11; preferably, in the present embodiment, the outer periphery of the waterproof membrane material 2a is fixedly installed and connected with the water surface floating body 3, and the water surface floating body 3 realizes a positioning and installation effect through an anchoring structure (not shown); further preferably, in order to increase the number of the photovoltaic modules 1 installed in a unit area, in this embodiment, the water surface floating body 3 has a quadrilateral shape, and the water surface floating body 3 can be used as an operation and maintenance channel at the same time, so that the maintenance and construction of the water surface photovoltaic installation structure can be facilitated; of course, other suitable shapes of the surface floats may be used, and this embodiment is not limited only.

Preferably, in the present embodiment, the periphery of the waterproof membrane material 2a and the water surface floating body 3 are integrally connected by hot melt and/or adhesive and/or fastening; in the specific implementation, the waterproof membrane material 2a and the water surface floating bodies 3 at two ends of the waterproof membrane material are connected by hot melting (for example, rapid hot melting is realized by a welding mode), and in other embodiments, the waterproof membrane material and the water surface floating bodies can be bonded by using an adhesive or an adhesive tape, and can be fixedly installed and connected by using a fastener; the above installation methods may also be combined and connected, which are selected by those skilled in the art based on the conventional technology available in the present application, and the present embodiment is not limited only.

Preferably, in the present embodiment, the waterproof membrane material 2a is made of a known thermoplastic polymer material, and its thickness is in the range of 0.05 to 5mm, more preferably 0.1 to 4mm, still more preferably 0.5 to 3mm.

Preferably, in the present embodiment, the back surface of the photovoltaic module 1 and the waterproof film material 2a are integrally connected by hot melt and/or adhesive and/or fastening, and particularly preferably by hot melt (see the hot melt welding point 2a1 shown in fig. 3); those skilled in the art may choose from conventional techniques according to the actual installation requirements, and the present embodiment does not limit them uniquely.

Example 13: the embodiment 13 proposes a water surface photovoltaic installation structure, please refer to fig. 4 and 5, which includes a plurality of photovoltaic modules installed on a bracket base, two ends of the bracket base 2b are correspondingly installed and connected with a water surface floating body 3, and the water surface floating body 3 realizes a positioning installation effect through an anchoring structure (known structure, not shown); wherein the photovoltaic module adopts the photovoltaic module 1 described in one of the above embodiments 4 to 11; a plurality of hollowed-out parts 4 are formed between the bracket base body 2b and the photovoltaic module 1 and are used for preventing water flow from gathering on the bracket base body 2 b;

the back of the single photovoltaic module 1 is correspondingly welded and installed and connected with at least 3 bracket matrixes 2b which are distributed at intervals, and the bracket matrixes 2b are connected with the water surface floating bodies 3 at the two ends of the bracket matrixes by hot melting in a welding mode to form a whole;

preferably, in the present embodiment, the bracket base 2b is a metal bracket base and/or a steel wire rope and/or a reinforced composite film, and is generally in a strip shape; preferably, in the present embodiment, both ends of the bracket base 2b are integrally connected to the surface floating body 3 by hot melt and/or adhesive and/or fastening.

Example 14: the technical solution of this embodiment 14 is the same as embodiment 13, except that, as shown in fig. 4 and 6, in this embodiment 14, both ends of the bracket base 2b are fixedly welded with a first bracket body 5a and a second bracket body 5b, respectively, and the first bracket body 5a and the second bracket body 5b are fixedly mounted (may be welded or fastened) on the water surface floating body 3, respectively, and the mounting height of the first bracket body 5a is greater than the mounting height of the second bracket body 5 b.

Example 15: the technical solution of this embodiment 15 is the same as embodiment 14, except that please refer to fig. 4 and 6 as well, in this embodiment 15, the first bracket body 5a is telescopically installed on the water surface floating body 3 up and down for flexibly adjusting the corresponding installation height, and the second bracket body 5b is fixedly installed on the water surface floating body 3.

It should be noted that, when the application is applied, the water surface floating body 3, the anchoring structure, the junction box of the photovoltaic module 1 and the power output structure thereof can all adopt the known technology, the application does not relate to the innovative content of the part, the person skilled in the art can make routine technical selection according to the common general knowledge, and the application does not specifically develop the description.

Comparative example 1: the remaining technical solutions of this comparative example 1 are the same as example 4, except that in this comparative example 1, the front-plate water-blocking vapor-deposited film and the back-plate water-blocking vapor-deposited film were not produced.

Comparative example 2: the remaining technical solutions of this comparative example 2 are the same as example 7, except that in this comparative example 2, the front-plate water-blocking vapor-deposited film and the back-plate water-blocking vapor-deposited film were not produced.

Comparative example 3: the remaining technical solutions of this comparative example 3 are the same as example 8, except that in this comparative example 3, the front-plate water-blocking vapor-deposited film and the back-plate water-blocking vapor-deposited film were not produced.

Comparative example 4: this comparative example 4 employs a double-glass packaged heterojunction HJT photovoltaic module.

Comparative example 5: this comparative example 5 employs a thin film photovoltaic module from han-energy photovoltaic.

The applicant conducted the following key performance index test comparisons for each of the photovoltaic modules set forth in examples 4 to 11 and comparative examples 1 to 5, and the results are shown in the following table 1:

TABLE 1 Key Performance index test comparison of photovoltaic modules

The applicant has also conducted the following key performance index test comparisons for the encapsulation layers of examples 4-11 and comparative examples 1-5 (wherein the flexible light-transmitting front plate and the flexible back plate in examples 1-9 each refer to a structure integrally provided with a corresponding water-blocking vapor deposition film), and the results are shown in the following table 2:

table 2 comparison of key performance index tests of photovoltaic module packaging layers

Comparison by the above implementation demonstrates that: the photovoltaic packaging layer provided by the embodiment has excellent light transmission performance and water vapor transmission resistance performance, is favorable for pushing the technical level of packaging the photovoltaic module on the water vapor transmission resistance performance, can be used for solving the technical problems faced by the photovoltaic module in a high-humidity installation environment, and overcomes the flexible packaging difficulty faced by the photovoltaic module with high sensitivity to water vapor.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The high-light-transmission and water vapor-transmission-resistant photovoltaic module is characterized by comprising a light-transmission front plate, a battery piece and a back plate which are laminated and compounded into a whole; the photovoltaic packaging layer adopted by the light-transmitting front plate and/or the back plate comprises a packaging substrate, wherein a water-blocking vapor deposition film is integrally arranged on at least 1 outer surface of the packaging substrate through vapor deposition; the photovoltaic module is arranged on a waterproof membrane material, and the waterproof membrane material is connected with the water surface floating body in an installation way; or the photovoltaic module is arranged on the support base body, two ends of the support base body are correspondingly connected with the water surface floating body in an installation mode, and a hollowed-out part is arranged between the support base body and the photovoltaic module and used for preventing water flow from gathering on the support base body;

the water surface floating body realizes a positioning and mounting effect through the anchoring structure.

2. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the water blocking vapor deposited film has a thickness in the range of 10-500nm.

3. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the water blocking vapor deposited film has a thickness in the range of 50-300nm.

4. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the water blocking vapor deposited film is made of a light transmitting inorganic oxide or a light transmitting inorganic nitride.

5. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the water blocking vapor deposited film is made of alumina or silica or silicon nitride.

6. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the package substrate is a glass or flexible substrate.

7. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 6, wherein the flexible substrate is a thermoplastic polymer or a fiber reinforced thermosetting powder coating.

8. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the water-blocking vapor deposited film is fabricated by physical vapor deposition or chemical vapor deposition.

9. The high transmission, moisture vapor transmission resistant photovoltaic module of claim 1, wherein the cell is a crystalline silicon cell or an amorphous silicon thin film cell; and/or the cell is a homojunction cell or a heterojunction HJT cell; and/or the battery piece is a single-sided battery piece or a double-sided battery piece.