CN111471405B

CN111471405B - Photovoltaic module packaging adhesive film and preparation method thereof

Info

Publication number: CN111471405B
Application number: CN202010323284.3A
Authority: CN
Inventors: 杜柑宏; 魏梦娟; 侯宏兵
Original assignee: Hangzhou First Applied Material Co Ltd
Current assignee: Hangzhou First Applied Material Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2021-11-19
Anticipated expiration: 2040-04-22
Also published as: CN111471405A

Abstract

The invention provides a photovoltaic module packaging adhesive film and a preparation method thereof. The photovoltaic module packaging adhesive film comprises an ethylene copolymer matrix, and an ion capture agent, activated ion exchange resin and an auxiliary agent which are dispersed in the ethylene copolymer matrix. The photovoltaic module packaging adhesive film provided by the invention can effectively adsorb free metal ions in the adhesive film, thereby realizing the effect of PID (proportion integration differentiation) phenomenon resistance of the module. The packaging adhesive film not only meets the anti-PID performance requirement of the traditional single-sided battery, but also shows excellent anti-PID effect when being applied to a double-sided battery assembly.

Description

Photovoltaic module packaging adhesive film and preparation method thereof

Technical Field

The invention relates to the field of photovoltaics, in particular to a photovoltaic module packaging adhesive film and a preparation method thereof.

Background

Solar modules are important devices for converting solar energy into electrical energy by using the photovoltaic effect. In the current society, the contradiction between the environment and energy is increasingly prominent, and among all new energy sources, solar energy has the characteristics of large reserves, renewability, environmental friendliness and the like, so that photovoltaic power generation becomes an important new energy development direction, and is favored by governments and organizations of various countries.

However, in practical applications, the solar module is ubiquitous with the problem of PID phenomenon (potential induced degradation). The PID phenomenon causes a large amount of charges to be accumulated on the surface of the battery piece, and the passivation effect of the surface of the battery piece is reduced, so that the power of the assembly is attenuated. Therefore, the occurrence of the PID phenomenon increases the equipment cost of photovoltaic power generation and ultimately limits the wide popularization of photovoltaic power generation, which is an important problem to be solved urgently in the photovoltaic industry at present. A number of businesses and research institutes have invested a great deal of effort and money in finding key ways to address this problem.

In the present studies, there are many different explanations as to the origin of the PID phenomenon, and among them the most widely accepted reason is ion migration in solar modules. Under the environment of high temperature and high humidity, water vapor enters the photovoltaic module, a series of chemical reactions are carried out, so that a large number of Na ions capable of moving freely are separated out from the glass protective layer, the Na ions move to the surface of the battery under the action of an external electric field and are enriched in the antireflection layer, the leakage current is increased, and the Na ions are compounded with current carriers in the battery piece so as to reduce the concentration of the current carriers in the battery piece, and finally the attenuation of the power of the module is caused. Therefore, the migration capability of metal ions in the adhesive film is limited, the content of free ions in the module is reduced, and the PID phenomenon of the solar module is hopefully avoided.

CN104966743B discloses a PID packaging adhesive film containing polymer metal ion scavenger. The metal catching agent comprises 1 or more than 2 of polyethylene-sodium methacrylate, polyethylene-zinc methacrylate, polyethylene-calcium methacrylate, sodium polystyrene sulfonate, potassium polystyrene sulfonate, zinc polystyrene sulfonate and calcium polystyrene sulfonate. The substances have strong ionic bonding effect and can generate strong locking effect on metal ions. After the EVA is added, the sodium ions which can migrate out of the surface of the glass can be captured and locked to a certain extent, and the migration rate of the sodium ions to the surface of the cell is reduced. However, the polymer introduced in the patent contains more other kinds of metal ions, the content of the metal ions in the whole material is not reduced or increased, and the insulation performance of the packaging adhesive film is greatly influenced.

CN109705773A discloses a PID resistant packaging adhesive film containing inorganic ion scavenger. According to the method, the zirconium phosphate is added into the adhesive film, so that metal ions are bound and fixed in an electric field environment, the free movement capacity of the metal ions in the assembly is reduced, and the PID effect problem of the photovoltaic assembly is effectively improved. CN106967368A discloses an anti-PID packaging adhesive film added with nano silicon oxide. The nanometer silicon dioxide capable of capturing sodium ions is added into the EVA adhesive film, and the silicon dioxide can also fill a channel for sodium ion migration to prevent the sodium ions from migrating to the surface of a crystalline silicon cell piece, so that the photovoltaic module has PID (proportion integration differentiation) resistance. However, such inorganic ion capturing agents have poor compatibility with polymers and are prone to agglomeration, and thus, it is still difficult to prepare stable and uniformly dispersed composite materials. Meanwhile, excessive inorganic filler can also have adverse effects on the properties of the adhesive film, such as light transmittance, toughness, binding power and the like.

In addition to the above disadvantages, it is more important that the photovoltaic packaging adhesive films prepared in all the above patents are applied to the module of the existing double-sided battery, and the power attenuation of the back surface of the module is serious. Therefore, when the schemes are applied to the double-sided battery, the overall anti-PID effect is poor, and the market demand of products cannot be met.

Disclosure of Invention

The invention mainly aims to provide a photovoltaic module packaging adhesive film and a preparation method thereof, so as to effectively improve the PID phenomenon of a photovoltaic module.

In order to achieve the above object, according to one aspect of the present invention, there is provided a photovoltaic module encapsulant film comprising an ethylene copolymer matrix and dispersed therein an ion scavenger, an activated ion exchange resin and an auxiliary agent.

Further, the ethylene copolymer comprises 0.01-5 parts of ion capturing agent and 0.01-5 parts of activated ion exchange resin per 100 parts of ethylene copolymer matrix; preferably, the ion capturing agent and the activated ion exchange resin are contained in an amount of 0.1-1 part and 0.1-1 part respectively per 100 parts of the ethylene copolymer matrix.

Further, the activated ion exchange resin is formed by activating the ion exchange resin, and the activating step is as follows: soaking the ion exchange resin in ethanol, filtering, washing to acidity, washing to neutrality, and drying to obtain activated ion exchange resin.

Further, the ion exchange resin is cation exchange resin and/or anion exchange resin; preferably, the ion exchange resin is a styrenic ion exchange resin and/or an acrylic ion exchange resin.

Further, the ion exchange resin is one or more of 731 type, 732 type, D113 type, D152 type, D151 type, 110 type cation exchange resin, preferably D113 type and/or D151 type cation exchange resin.

Further, the ion trapping agent is metal phosphate and/or metal oxide; preferably, the ion trapping agent is one or more of aluminum phosphate, titanium phosphate, tin phosphate, zirconium phosphate, titanium oxide, aluminum oxide, magnesium oxide, calcium oxide and silicon dioxide, and more preferably zirconium phosphate and/or titanium phosphate.

Further, the auxiliary agent is one or more of a cross-linking agent, an antioxidant, a light stabilizer, an ultraviolet light absorber, a tackifier and a filler; preferably, the crosslinking agent is a peroxide-based crosslinking agent; preferably, the light stabilizer is a hindered amine light stabilizer.

Further, the ethylene copolymer comprises 0.1-5 parts of auxiliary agent per 100 parts of ethylene copolymer matrix.

Further, the material of the ethylene copolymer matrix is one or more of ethylene vinyl acetate copolymer, ethylene octene copolymer, ethylene pentene copolymer, ethylene methyl acrylate copolymer and ethylene methyl methacrylate copolymer.

According to another aspect of the invention, a preparation method of the photovoltaic module packaging adhesive film is also provided, which is characterized by comprising the following steps: and sequentially blending, melt-extruding and casting the raw materials to form a film, thereby obtaining the photovoltaic module packaging adhesive film.

The invention provides a photovoltaic module packaging adhesive film which comprises an ethylene copolymer matrix, and an ion capture agent, activated ion exchange resin and an auxiliary agent which are dispersed in the ethylene copolymer matrix. The packaging adhesive film is simultaneously introduced with an ion capturing agent and activated ion exchange resin, wherein the ion capturing agent can capture alkali metal ions, alkaline earth metal ions and the like in the adhesive film in an ion exchange mode and the like, and the activated ion exchange resin can perform ion exchange with metal ions in the external environment to play roles in adsorbing and fixing the metal ions. And the activated ion exchange resin does not contain any metal ion component, and no new metal ion impurity is additionally introduced. In addition, the ion exchange resin is a polymer, and has better compatibility with the packaging adhesive film compared with metal oxide. And the ion exchange resin has a loose and porous structure, so that on one hand, the contact area of adsorption can be increased, on the other hand, the added inorganic ion trapping agent can be adsorbed, the agglomeration phenomenon of the inorganic ion trapping agent is avoided, and the dispersion of the inorganic ion trapping agent in the adhesive film is more uniform.

Based on the reasons, the photovoltaic module packaging adhesive film provided by the invention can effectively adsorb free metal ions in the adhesive film, so that the PID phenomenon resistance effect of the module is realized. The packaging adhesive film not only meets the anti-PID performance requirement of the traditional single-sided battery, but also shows excellent anti-PID effect when being applied to a double-sided battery assembly.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.

The invention provides a photovoltaic module packaging adhesive film which comprises an ethylene copolymer matrix, and an ion capture agent, activated ion exchange resin and an auxiliary agent which are dispersed in the ethylene copolymer matrix. The packaging adhesive film is simultaneously introduced with an ion capturing agent and activated ion exchange resin, wherein the ion capturing agent can capture alkali metal ions, alkaline earth metal ions and the like in the adhesive film in an ion exchange mode and the like, and the activated ion exchange resin can perform ion exchange with metal ions in the external environment to play roles in adsorbing and fixing the metal ions. And the activated ion exchange resin does not contain any metal ion component, and no new metal ion impurity is additionally introduced. In addition, the ion exchange resin is a polymer, and has better compatibility with the packaging adhesive film compared with metal oxide. And the ion exchange resin has a loose and porous structure, so that on one hand, the contact area of adsorption can be increased, on the other hand, the added inorganic ion trapping agent can be adsorbed, the agglomeration phenomenon of the inorganic ion trapping agent is avoided, and the dispersion of the inorganic ion trapping agent in the adhesive film is more uniform. Based on the reasons, the ion capture agent and the activated ion exchange resin act together to enhance the fixation effect on the free metal ions in the adhesive film, so that the photovoltaic module packaging adhesive film provided by the invention can effectively adsorb the free metal ions in the adhesive film, and the effect of PID (proportion integration differentiation) phenomenon resistance of the module is realized. The packaging adhesive film not only meets the anti-PID performance requirement of the traditional single-sided battery, but also shows excellent anti-PID effect when applied to a double-sided battery assembly (compared with the single use of an ion trapping agent, the adhesive film provided by the invention can realize that the back power attenuation of the battery is less than 5% when applied to the double-sided battery, so that the anti-PID performance of the assembly meets the market requirement).

In order to further improve the capability of the packaging adhesive film for adsorbing free metal ions and simultaneously enable the ion capture agent to be better dispersed and enable the adhesive film to have better light transmittance, toughness, cohesive force and the like, in a preferred embodiment, each 100 parts by weight of the ethylene copolymer matrix comprises 0.01-5 parts by weight of the ion capture agent and 0.01-5 parts by weight of activated ion exchange resin; more preferably, the ion scavenger is contained in an amount of 0.1 to 1 part and the activated ion exchange resin is contained in an amount of 0.1 to 1 part per 100 parts of the ethylene copolymer matrix. Wherein the ion trapping agent and the ion exchange resin have no special proportion requirement.

In a preferred embodiment, the activated ion exchange resin is formed by activating an ion exchange resin, and the activating step is: soaking the ion exchange resin in ethanol, filtering, washing to acidity, washing to neutrality, and drying to obtain activated ion exchange resin. The ion exchange resin is soaked in ethanol to dissolve and remove unreacted monomers and other organic impurities in the resin, and the specific soaking time is preferably 8-24 h. After removing the filtrate by filtration, the solid filtrate is preferably washed to acidity with 5% hydrochloric acid and then washed to neutrality with distilled water, and this way of washing enables the production of a hydrogen-type cation exchange resin, which removes metal ions that may remain in the exchange resin, to further enhance the metal ion capturing effect of the ion exchange resin. In the actual washing process, the acid washing and the water washing are preferably repeated for 2 to 3 times. Preferably, after the drying step, the dried material is ground to a powder.

In a preferred embodiment, the ion exchange resin is a cation exchange resin and/or an anion exchange resin; preferably, the ion exchange resin is a styrenic ion exchange resin and/or an acrylic ion exchange resin. The main structure of the ion exchange resin is styrene or acrylic, the compatibility between the ion exchange resin and a matrix polymer EVA is better, and the ion exchange resin is favorable for ensuring the light transmittance and other mechanical properties of an adhesive film. More preferably, the ion exchange resin is one or more of 731 type, 732 type, D113 type, D152 type, D151 type, and 110 type cation exchange resins, and further preferably D113 type and/or D151 type cation exchange resins. The ion exchange resins have better ion capture capacity after being activated, have better fixing and dispersing effects on the metal ion capture agent, have better synergistic effect when being used together with the metal ion capture agent, and have more obvious improvement on the PID phenomenon of the photovoltaic module.

In a preferred embodiment, the ion scavenger is a metal phosphate and/or a metal oxide. The ion trapping agent has stronger trapping capability on free ions in the adhesive film. More preferably, the ion capturing agent is one or more of aluminum phosphate, titanium phosphate, tin phosphate, zirconium phosphate, titanium oxide, aluminum oxide, magnesium oxide, calcium oxide, and silicon dioxide, and more preferably zirconium phosphate and/or titanium phosphate.

The auxiliary agent can adopt the common auxiliary agent in the field for improving the film forming performance, the oxidation resistance and the like of the adhesive film, and in a preferred embodiment, the auxiliary agent is one or more of a cross-linking agent, an antioxidant, a light stabilizer, an ultraviolet light absorber, a tackifier and a filler; preferably, the crosslinking agent is a peroxide-based crosslinking agent; preferably, the light stabilizer is a hindered amine light stabilizer.

In order to further improve the overall performance of the adhesive film, in a preferred embodiment, the auxiliary agent is contained in an amount of 0.1-5 parts by weight per 100 parts by weight of the ethylene copolymer matrix.

More preferably, the material of the ethylene copolymer matrix is one or more of ethylene vinyl acetate copolymer (EVA, the VA content of which is preferably 25-33 wt%), ethylene octene copolymer, ethylene pentene copolymer, ethylene methyl acrylate copolymer and ethylene methyl methacrylate copolymer.

According to another aspect of the present invention, there is also provided a preparation method of the above photovoltaic module packaging adhesive film, which includes the following steps: and sequentially blending, melt-extruding and casting the raw materials to form a film, thereby obtaining the photovoltaic module packaging adhesive film.

The preparation method simultaneously introduces an ion capturing agent and activated ion exchange resin into the packaging adhesive film, wherein the ion capturing agent can capture alkali metal ions, alkaline earth metal ions and the like in the adhesive film in an ion exchange mode and the like, and the activated ion exchange resin can perform ion exchange with metal ions in the external environment to play roles in adsorbing and fixing the metal ions. And the activated ion exchange resin does not contain any metal ion component, and no new metal ion impurity is additionally introduced. In addition, the ion exchange resin is a polymer, and has better compatibility with the packaging adhesive film compared with metal oxide. And the ion exchange resin has a loose and porous structure, so that on one hand, the contact area of adsorption can be increased, on the other hand, the added inorganic ion trapping agent can be adsorbed, the agglomeration phenomenon of the inorganic ion trapping agent is avoided, and the dispersion of the inorganic ion trapping agent in the adhesive film is more uniform. Based on the reasons, the ion capture agent and the activated ion exchange resin act together to enhance the fixation effect on the free metal ions in the adhesive film, so that the photovoltaic module packaging adhesive film provided by the invention can effectively adsorb the free metal ions in the adhesive film, and the effect of PID (proportion integration differentiation) phenomenon resistance of the module is realized. The packaging adhesive film not only meets the anti-PID performance requirement of the traditional single-sided battery, but also shows excellent anti-PID effect when applied to a double-sided battery assembly (compared with the single use of an ion trapping agent, the adhesive film provided by the invention can realize that the back power attenuation of the battery is less than 5% when applied to the double-sided battery, so that the anti-PID performance of the assembly meets the market requirement).

Preferably, after casting to form a film, the above method further comprises cooling, slitting and winding steps, which are all steps commonly used in the art and will not be described herein.

The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.

Example 1

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.2 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-1 for resisting the PID phenomenon of the assembly.

Example 2

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.2 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D151 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-2 resisting the PID phenomenon of the assembly.

Example 3

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.05 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-3 resisting the PID phenomenon of the assembly.

Example 4

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 1 part by mass of an ion scavenger zirconium phosphate (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingdida positive source), 0.2 part of hindered amine light stabilizer bis-2, 2, 6, 6-tetramethylpiperidinol sebacate (Tianjin Lianlong GmbH), 0.6 part of a crosslinking agent tert-butyl 2-ethylhexanoate peroxide (Acoma Co.), 0.5 part of a tackifier gamma-methacryloxypropyltrimethoxysilane (Jianghan fine chemical Co., Ltd., Hubei Jing), and 1 part of triallyl isocyanurate (Yingchun Tex Co., Ltd.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-4 resisting the PID phenomenon of the assembly.

Example 5

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 2 parts by mass of zirconium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingdida positive source), 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjin Lianlong Co., Ltd.), 0.6 part of tert-butyl 2-ethylhexanoate as a crosslinking agent peroxide (Achima), 0.5 part of gamma-acryloxypropyltrimethoxysilane methacrylate as a tackifier (Jianghan Jinghan fine chemical Co., Ltd.), and 1 part of triallyl isocyanurate (Yingchuang Tex Ltd.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-5 resisting the PID phenomenon of the assembly.

Example 6

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.2 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 2 parts by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron GmbH), 0.6 part of tert-butyl 2-ethylhexyl carbonate as a crosslinking agent (Achima company), 0.5 part of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan Fine chemical Co., Ltd.), and 1 part of triallyl isocyanurate (Yingdegusai Co., Ltd.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-6 for resisting the PID phenomenon of the assembly.

Example 7

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.2 part by mass of titanium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-7 resisting the PID phenomenon of the assembly.

Example 8

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.2 part by mass of titanium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D151 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-8 resisting the PID phenomenon of the assembly.

Example 9

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC, with a VA content of 28%), 0.05 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 0.05 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron, Ltd.), 0.6 part by mass of tert-butyl 2-ethylhexyl carbonate as a crosslinking agent (Acoma), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Jianghan fine chemical Co., Ltd., Hubei, U.S.A.), and 1 part of triallylisocyanurate (Wingde solid Co., Ltd.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-9 resisting the PID phenomenon of the assembly.

Example 10

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 2 parts by mass of zirconium phosphate as an ion scavenger (Acors reagent), 2 parts by mass of D113 ion exchange resin (Tianjingdida positive source), 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjin Lianlong Co., Ltd.), 0.6 part of tert-butyl 2-ethylhexanoate as a crosslinking agent peroxide (Achima), 0.5 part of gamma-acryloxypropyltrimethoxysilane methacrylate as a tackifier (Jianghan Jinghan fine chemical Co., Ltd.), and 1 part of triallyl isocyanurate (Yingchuang Tex Ltd.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-10 resisting the PID phenomenon of the assembly.

Example 11

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.01 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 5 parts by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part of triallyl isocyanurate (Yingdegusai, Inc.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-11 resisting the PID phenomenon of the assembly.

Example 12

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 5 parts by mass of zirconium phosphate as an ion scavenger (Acors reagent), 0.01 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane as a tackifier (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-12 resisting the PID phenomenon of the assembly.

Example 13

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 1 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 0.1 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part by mass of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron limited), 0.6 part by mass of tert-butyl 2-ethylhexanoate as a crosslinking agent (Achima company), 0.5 part by mass of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan fine chemical industry, Inc.), and 1 part by mass of triallyl isocyanurate (Yingdegusai, Inc.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-13 resisting the PID phenomenon of the assembly.

Example 14

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 0.1 part by mass of zirconium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjinlinaron GmbH), 0.6 part of tert-butyl 2-ethylhexyl carbonate as a crosslinking agent (Achima company), 0.5 part of gamma-methacryloxypropyltrimethoxysilane methacrylate (Hubei Jingjianhan Fine chemical Co., Ltd.), and 1 part of triallyl isocyanurate (Yingdegusai Co., Ltd.). Activating the ion exchange resin, premixing with other raw materials, performing melt extrusion, performing tape casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film E-14 resisting the PID phenomenon of the assembly.

Comparative example 1

A conventional photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (Singapore TPC company, with a VA content of 28%), 0.2 part of hindered amine light stabilizer bis-2, 2, 6, 6-tetramethylpiperidinol sebacate (Tianjin Lianlong Co., Ltd.), 0.6 part of cross-linking agent tert-butyl 2-ethylhexanoate peroxide (Acoma Co., Ltd.), 0.5 part of tackifier gamma-methacryloxypropyltrimethoxysilane (Jianghan fine chemical Co., Ltd., Hubei Jing.), and 1 part of triallyl isocyanurate (Wingchuang Delgaseisai Co., Ltd.). The photovoltaic packaging adhesive film is prepared by mixing the raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like.

Comparative example 2

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (Singapore TPC company, with a VA content of 28%), 0.05 part by mass of zirconium phosphate (Acors reagent) as an ion scavenger, 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate (Tianjin Lianlong Co., Ltd.) as a hindered amine light stabilizer, 0.6 part of tert-butyl 2-ethylhexanoate peroxide as a crosslinking agent (Ackema Co., Ltd.), 0.5 part of gamma-methacryloxypropyltrimethoxysilane (Jianghan Fine chemical Co., Ltd. of Hubei Jing), and 1 part of triallyl isocyanurate (Wingde Tex Co., Ltd.). The photovoltaic packaging adhesive film capable of resisting the PID phenomenon of the assembly is prepared through the processes of mixing the raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like.

Comparative example 3

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 1 part by mass of D113 ion exchange resin (Tianjingda positive source), 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate (Tianjinlinanlong GmbH), a hindered amine light stabilizer, 0.6 part of tert-butyl 2-ethylhexyl carbonate peroxide (Acoma), 0.5 part of gamma-methacryloxypropyltrimethoxysilane methacrylate (Jianghan fine chemical Co., Ltd., Hubei), and 1 part of triallyl isocyanurate (Wingdegusai Co., Ltd.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film resisting the PID phenomenon of the assembly.

Comparative example 4

The anti-PID photovoltaic packaging material comprises the following main raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer (singapore TPC company, with a VA content of 28%), 6 parts by mass of zirconium phosphate as an ion scavenger (Acors reagent), 1 part by mass of D113 ion exchange resin (Tianjingdida positive source), 0.2 part of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate as a hindered amine light stabilizer (Tianjin Lianlong Co., Ltd.), 0.6 part of tert-butyl 2-ethylhexanoate as a crosslinking agent peroxide (Achima), 0.5 part of gamma-acryloxypropyltrimethoxysilane methacrylate as a tackifier (Jianghan Jinghan fine chemical Co., Ltd.), and 1 part of triallyl isocyanurate (Yingchuang Tex Ltd.). Activating ion exchange resin, premixing with other raw materials, melting and extruding, casting to form a film, cooling, slitting, rolling and the like to prepare the photovoltaic packaging adhesive film resisting the PID phenomenon of the assembly.

Performance testing

The packaging material preparation laminates of examples 1 to 14 and comparative examples 1 to 4 were subjected to light transmittance and PID tests. The thickness of the adhesive film of each of the examples and comparative examples after lamination was 0.45nm, wherein the light transmittance was measured according to GB/T2410-2008. The EVA adhesive films obtained in the embodiments and the comparative examples and a P-type double-sided battery of A company are manufactured into a double-sided double-glass assembly through the same process, the PID test of the photovoltaic assembly is tested according to IEC TS 2804-1:2015, the test conditions are tightened to 85 ℃, 85% RH, a constant direct current voltage of minus 1500V is applied, and the double-sided power attenuation before and after the PID test of the photovoltaic assembly is measured after 192 hours. The characterization test results are shown in table 1:

TABLE 1

As can be seen from the comparison of the performance test data of the examples and comparative examples described in Table 1 above:

after the dosage of the ion capture agent and the ion exchange resin is increased, the light transmittance of the adhesive film shows a descending trend. Within the set preferable range, the light transmittance can reach more than 90%. And the double-glass assembly is manufactured by matching with a P-type double-sided battery, and most of the power attenuation of the front side and the back side is controlled within 5% under the test conditions of-1500V and 196h, so that the market requirement is met.

As can be seen from comparative example 1, the photovoltaic encapsulant film without the ion trap and the ion exchange resin exhibited a great module power attenuation phenomenon. In comparative example 2, although the anti-PID performance of the photovoltaic packaging adhesive film with the zirconium phosphate added alone is significantly improved, the power attenuation of the back surface of the module is still greater than 5%, which is not in line with the actual production requirement. And the photovoltaic packaging adhesive film only containing the ion exchange resin has over 10 percent of power attenuation on the back surface of the prepared assembly, and the PID resistance effect is not ideal.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: according to the solar cell packaging material provided by the scheme of the invention, the requirement of the P-type double-sided cell on PID resistance can be met by reasonably adding the ion capture agent and the ion exchange resin, namely, the light transmittance is maintained to be more than 90%, and the power attenuation of the front side and the back side of the component is below 5%.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The photovoltaic module packaging adhesive film is characterized by comprising an ethylene copolymer matrix, and an ion capture agent, an activated ion exchange resin and an auxiliary agent which are dispersed in the ethylene copolymer matrix; 0.01 to 5 parts by weight of the ion capturing agent and 0.01 to 5 parts by weight of the activated ion exchange resin per 100 parts by weight of the ethylene copolymer matrix; the ion exchange resin in the activated ion exchange resin is one or more of 731 type, 732 type, D113 type, D152 type, D151 type and 110 type cation exchange resin; the ion capture agent is one or more of aluminum phosphate, titanium phosphate, tin phosphate and zirconium phosphate.

2. The film for photovoltaic module encapsulation according to claim 1, wherein the ion scavenger is contained in an amount of 0.1 to 1 part by weight and the activated ion exchange resin is contained in an amount of 0.1 to 1 part by weight per 100 parts by weight of the ethylene copolymer matrix.

3. The film according to claim 1, wherein the activated ion exchange resin is formed by activating the ion exchange resin, and the activating step is:

soaking the ion exchange resin in ethanol, filtering, washing to acidity, washing to neutrality, and drying to obtain the activated ion exchange resin.

4. The photovoltaic module encapsulant film according to claim 1, wherein the ion exchange resin is a D113 type and/or a D151 type cation exchange resin.

5. The photovoltaic module encapsulant film of any one of claims 1 to 4, wherein the ion scavenger is zirconium phosphate and/or titanium phosphate.

6. The photovoltaic module encapsulant film of any one of claims 1-4, wherein the auxiliary agent is one or more of a cross-linking agent, an antioxidant, a light stabilizer, an adhesion promoter, and a filler.

7. The photovoltaic module encapsulant film of claim 6,

the cross-linking agent is a peroxide cross-linking agent;

the light stabilizer is a hindered amine light stabilizer.

8. The photovoltaic module packaging adhesive film according to claim 6, wherein the auxiliary agent is contained in an amount of 0.1-5 parts by weight per 100 parts by weight of the ethylene copolymer matrix.

9. The photovoltaic module encapsulant film of claim 1, wherein the ethylene copolymer matrix is made of one or more of ethylene vinyl acetate copolymer, ethylene octene copolymer, ethylene pentene copolymer, ethylene methyl acrylate copolymer, and ethylene methyl methacrylate copolymer.

10. The preparation method of the photovoltaic module packaging adhesive film of any one of claims 1 to 9, characterized by comprising the following steps: and sequentially blending, melt-extruding and casting the raw materials to form a film, thereby obtaining the photovoltaic module packaging adhesive film.