CN212783477U - Solar cell backboard and solar cell module - Google Patents
Solar cell backboard and solar cell module Download PDFInfo
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- CN212783477U CN212783477U CN201921833788.9U CN201921833788U CN212783477U CN 212783477 U CN212783477 U CN 212783477U CN 201921833788 U CN201921833788 U CN 201921833788U CN 212783477 U CN212783477 U CN 212783477U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a solar cell backboard and a solar cell module, wherein the solar cell backboard comprises a colorful bonding layer, a substrate layer, a first adhesive layer and a weather-proof layer which are connected in sequence; on the premise that the solar cell back plate has good bonding performance and aging resistance, the color requirement of the solar cell back plate for building color integration of solar cell modules in different building occasions can be met when the solar cell back plate is used in the solar cell modules.
Description
Technical Field
The utility model belongs to the battery field relates to a solar cell backplate and solar module, especially relates to a colored solar cell backplate and solar module.
Background
A solar cell (solar chip, photovoltaic cell) is a photoelectric semiconductor sheet that directly generates electricity using sunlight. It can output voltage and generate current under the condition of loop as long as it is illuminated by light meeting a certain illumination condition. Solar cells are devices that directly convert light energy into electrical energy by the photoelectric or photochemical effect. Crystalline silicon solar cells working with the photoelectric effect are the mainstream, while thin film solar cells working with the photochemical effect are still in the germination stage.
The solar cell comprises a solar cell back plate, also called a solar cell back plate film, and comprises a gluing composite back plate film, namely a PET polyester film is compounded with fluorine films or EVA adhesive films on two sides, such as TPT, TPE, KPK and other structures; the method also comprises coating a back plate film, namely coating fluororesin on two sides of the PET polyester film, and drying and curing to form a film. Although the solar cell back sheet is developed relatively mature at present, the color of the solar cell back sheet is monotonous, and the color of surrounding buildings and the like may not meet, so that the overall aesthetic property of the environment is influenced.
CN107195717B discloses a solar cell back plate, which comprises a weather-resistant layer, a structure enhancement layer and a weather-resistant layer in sequence, wherein the structure enhancement layer and the weather-resistant layer are bonded and fixed through a bonding layer; the weather-resistant layer is a fluorine material layer, and the structure enhancement layer comprises the following raw materials: foamed aluminum, polyimide, nanocarbon, zinc oxide, titanium oxide, ethylene glycol, biphenyl polyimide, carboxyl-terminal-containing polyimide, bisphenol, ethyl acetate, magnesium sulfate, sodium chloride, nickel oxide and deionized water. The solar cell backboard has good weather resistance and tensile property through the combination of the three-layer structure, but the requirement of integration or coordination and collocation of the solar cell module and the building color cannot be met.
Therefore, it is necessary to provide a solar cell back sheet that can meet the basic performance of a solar cell module and can meet the demand for integration with building colors.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a solar cell backboard and a solar cell module; on the premise that the solar cell back plate has good bonding performance and aging resistance, the color requirement of the solar cell back plate for building color integration of solar cell modules in different building occasions can be met when the solar cell back plate is used in the solar cell modules.
In order to achieve the purpose of the utility model, the utility model adopts the following technical proposal:
an object of the utility model is to provide a solar cell backplate, solar cell backplate is including the colored tie coat, base member layer, first adhesive layer and the layer of nai time that connect gradually.
The utility model provides a solar cell panel has better adhesive property and ageing resistance, and the outward appearance advantage such as pleasing to the eye, and it is arranged in can satisfying the color demand of different building occasions to solar cell module building colour integration among the solar cell module.
The color bonding layer in the utility model is used for bonding the solar cell backboard and the solar cell group together and has the aesthetic property of the solar cell backboard; the first adhesive layer is used for bonding the substrate layer and the weather-resistant layer together; the weather-resistant layer is used for improving the weather resistance of the solar panel.
The utility model discloses well colored tie coat, first adhesive layer and resistant time layer mainly form in proper order on base member layer surface through the mode of dip-coating, coating by vaporization, pressfitting and coating by vaporization, also link together through these modes promptly, do not specifically limit to specific preparation method in this application, and the technical personnel in the field can adjust according to actual need, and the preparation method of preferred solar cell backplate includes following step: firstly, preparing a coating required by a color bonding layer, and coating the coating on the surface of a PET substrate layer in a reticulate pattern coating mode; preparing an adhesive required by the first bonding layer, coating the adhesive on the other side of the PET substrate layer in a reticulate pattern coating mode, attaching the weather-resistant layer to the substrate layer in a hot-pressing attaching mode, standing at normal temperature for 24 hours, baking at 70 ℃ for 48 hours, and curing to obtain the solar cell back plate.
In the present invention, the thickness of the colored adhesive layer (1) is 0.001-0.04mm, such as 0.001mm, 0.005mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, etc. When the thickness of the color bonding layer is less than 0.001mm, the bonding performance of the solar cell back plate and the solar cell is deteriorated, and the flooded color of the solar cell is also influenced; when the thickness of the color adhesive layer is higher than 0.04mm, the variation of the adhesive property between the solar cell back sheet and the solar cell is not too significant, but the cost is significantly increased.
The utility model discloses in, the colored tie coat is that this department prepares by oneself and obtains, adopts organic resin, curing agent, pigment, filler, auxiliary agent and solvent mixture, and the coating forms on the base member layer. The utility model discloses do not specifically restrict the colour of colored tie coat, the technical personnel in the field can adjust according to actual need and add corresponding pigment, and pigment exemplarily includes iron oxide red, cadmium red, toluidine red, lithol red, counterpoint red, bright red, chrome yellow, cadmium yellow, ferrite yellow, benzidine yellow, permanent yellow, chrome green, zinc green, iron green, phthalocyanine green, iron blue, ultramarine, phthalocyanine blue, ultramarine violet, cobalt violet, manganese violet, methyl violet, one or several kinds in the permanent violet. The medium auxiliary agent of the present invention illustratively includes any one or a combination of at least two of a dispersant, a wetting dispersant, a leveling agent, a defoaming agent, and an anti-settling agent.
The utility model discloses in, colored tie coat, base member layer, first adhesive layer, resistant layer of waiting, second adhesive layer and heat dissipation layer all are the commercial product, can directly purchase or use.
The utility model discloses in the colour through adjustment colored tie coat to the control is to the absorption condition of different wave band light, can satisfy the color needs of different building occasions to solar module building colour integration in being arranged in the solar module subassembly.
The utility model discloses in, base member layer (2) is the PET thin layer, the thickness of base member layer (2) is 0.06-1.1mm, for example 0.06mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm etc..
In the present invention, the thickness of the first adhesive layer (3) is 0.003-0.025mm, for example, 0.003mm, 0.005mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, etc. When the thickness of the first adhesive layer is less than 0.001mm, the adhesive property of the solar cell back plate is affected; when the thickness of the first adhesive layer is higher than 0.025mm, the production process of the solar back panel is affected and the cost is significantly increased.
The utility model discloses well effect on first adhesive layer is for bonding base member layer and resistant time layer, can satisfy better adhesive action can, the utility model discloses do not specifically inject the material on first adhesive layer, technical field personnel can adjust according to actual need, and arbitrary one or at least two kinds of combination in preferred polyurethane adhesive, acrylic resin adhesive, epoxy adhesive or the polyester adhesive.
In the present invention, the thickness of the weather-resistant layer (4) is 0.003-0.06mm, for example, 0.003mm, 0.005mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, 0.05mm, 0.055mm, 0.06mm, etc. When the thickness of the weather-resistant layer is less than 0.001mm, the weather resistance of the solar cell back plate is affected; when the thickness of the weather-resistant layer is higher than 0.06mm, the production process of the solar back panel is affected and the cost is significantly increased.
The utility model discloses in, solar cell backplate still includes heat dissipation layer (5), the heat dissipation layer is located between base member layer (2) and first adhesive layer (3).
The utility model discloses in, solar cell backplate still includes second adhesive layer (6), second adhesive layer (6) are located between base member layer (2) and heat dissipation layer (5).
In the present invention, the thickness of the heat dissipation layer (5) is 0.01 to 3.5mm, (e.g., 0.01mm, 0.05mm, 0.1mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 3mm, 3.2mm, 3.5mm, etc.), and the thickness of the second adhesive layer (6) is 0.003 to 0.025mm, (e.g., 0.003mm, 0.005mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, etc.).
In the utility model, when the thickness of the heat dissipation layer is less than 0.01mm, the heat dissipation performance of the solar cell backboard is deteriorated; when the thickness of the heat dissipation layer is higher than 3.5mm, the production process of the solar backboard is affected, and the cost is significantly increased.
The utility model discloses the primary function on well heat dissipation layer is the improvement radiating effect, the utility model discloses do not specifically inject the material on heat dissipation layer, technical personnel in the field can adjust according to actual need, and arbitrary one or at least two kinds of combination in preferred graphite flake, mica paper, heat conduction silicon adhesive tape, aluminium foil or the copper foil.
In the utility model, when the thickness of the second adhesive layer is less than 0.001mm, the adhesive property of the solar cell back plate is affected; when the thickness of the second adhesive layer is higher than 0.025mm, the production process of the solar back panel is affected and the cost is significantly increased.
The utility model discloses well effect on second adhesive layer is for bonding base member layer and heat dissipation layer, can satisfy better adhesive action can, the utility model discloses do not specifically inject the material on second adhesive layer, technical field personnel can adjust according to actual need, and arbitrary one or at least two kinds of combination in preferred polyurethane adhesive, acrylic resin adhesive, epoxy adhesive or the polyester adhesive.
A second object of the utility model is to provide a solar module, solar array is including consecutive positive glass layer, first encapsulated layer, battery piece layer, second encapsulated layer and backsheet layer, backsheet layer is one of purpose the solar cell backplate.
In the present invention, the second encapsulating layer of the solar cell module and the bonding layer in the back sheet layer are connected to each other.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses well colored solar cell backplate has advantages such as better adhesive property, heat dispersion, ageing resistance and outward appearance are pleasing to the eye, and it is arranged in can satisfying the color demand of different building occasions to solar module building color integration among the solar module.
Drawings
Fig. 1 is a schematic structural view of a solar cell back sheet in example 1;
wherein, 1 is a color bonding layer, 2 is a substrate layer, 3 is a first adhesive layer, and 4 is a weather-resistant layer;
FIG. 2 is a schematic structural view of a solar cell module according to example 1;
wherein 100 is a front glass layer, 101 is a first packaging layer, 102 is a battery sheet layer, 103 is a second packaging layer, and 104 is a back sheet layer;
fig. 3 is a schematic structural view of a solar cell backsheet in example 2;
wherein, 1 is a color bonding layer, 2 is a substrate layer, 3 is a first adhesive layer, 4 is a weather-resistant layer, 5 is a heat dissipation layer, and 6 is a second adhesive layer.
Detailed Description
The technical solution of the present invention will be further explained by the following embodiments. It should be understood by those skilled in the art that the described embodiments are merely provided to assist in understanding the present invention and should not be construed as specifically limiting the present invention.
Example 1
The embodiment provides a solar cell back plate, as shown in fig. 1, the solar cell back plate comprises a color bonding layer 1, a substrate layer 2, a first adhesive layer 3 and a weather-resistant layer 4 which are connected together from bottom to top; wherein the thickness of the color bonding layer 1 is 0.01 mm; the color bonding layer 1 (the color bonding agent is owned by me) is a red bonding layer; the substrate layer 2 is a polyethylene glycol terephthalate film layer (model DS10, sourced from Sichuan Dong material technology) with the thickness of 0.25 mm; the first adhesive layer 3 is a transparent polyester adhesive layer (the transparent polyester adhesive is owned by me) with the thickness of 0.01mm, and the weather-resistant layer 4 is a polyvinylidene fluoride film (owned by me) with the thickness of 0.025 mm.
The embodiment also provides a solar cell module, as shown in fig. 2, which includes a front glass layer (100), a first encapsulation layer (101), a cell layer (102), a second encapsulation layer (103), and a back plate layer (104) connected in sequence, where the back plate layer is the solar cell back plate.
Example 2
The embodiment provides a solar cell back plate, as shown in fig. 3, the solar cell back plate includes a color bonding layer 1, a substrate layer 2, a second adhesive layer 6, a heat dissipation layer 5, a first adhesive layer 3 and a weather-resistant layer 4, which are connected together from bottom to top; wherein the thickness of the color bonding layer 1 (the color bonding agent is owned by me) is 0.01 mm; the color bonding layer 1 is a blue bonding layer; the substrate layer 2 is a polyethylene glycol terephthalate film layer (model DS10, sourced from Sichuan Dong material technology) with the thickness of 0.275 mm; the material of the second adhesive layer 6 is transparent polyester type adhesive (available from my company), and the thickness is 0.008 mm; the heat dissipation layer is an aluminum foil layer, and the thickness of the heat dissipation layer is 0.03 mm; the first adhesive layer 3 is made of transparent polyester type adhesive (owned by the owner of the source of the adhesive) and is 0.008mm in thickness, and the weather-resistant layer 4 is a polyvinylidene fluoride film (owned by the owner of the source of the adhesive) and is 0.03mm in thickness.
The method for manufacturing the solar cell module in this example is the same as that of example 1.
Example 3
The embodiment provides a solar cell back plate, which comprises a color bonding layer, a substrate layer, a second adhesive layer, a heat dissipation layer, a first adhesive layer and a weather-resistant layer which are connected together from bottom to top; wherein the thickness of the color bonding layer (the color adhesive is owned by me) is 0.001 mm; the color bonding layer is a green bonding layer; the substrate layer is a polyethylene glycol terephthalate film layer (model DS10, sourced from Sichuan Dong material technology) with the thickness of 1.1 mm; the second adhesive layer is made of transparent polyester adhesive (available from my company), and the thickness of the second adhesive layer is 0.003 mm; the heat dissipation layer is an aluminum foil layer, and the thickness of the heat dissipation layer is 3.5 mm; the first adhesive layer is made of transparent polyester type adhesive (owned by the owner of the source of the adhesive) and is 0.003mm thick, and the weather-resistant layer is made of a polyvinylidene fluoride film (owned by the owner of the source of the adhesive) and is 0.06mm thick.
The method for manufacturing the solar cell module in this example is the same as that of example 1.
Example 4
The embodiment provides a solar cell back plate, which comprises a color bonding layer, a substrate layer, a second adhesive layer, a heat dissipation layer, a first adhesive layer and a weather-resistant layer which are connected together from bottom to top; wherein the thickness of the color bonding layer (the color adhesive is owned by me) is 0.04 mm; the color bonding layer is a yellow bonding layer; the substrate layer is a polyethylene glycol terephthalate film layer (model DS10, sourced from Sichuan Dong material technology) with the thickness of 0.06 mm; the material of the second adhesive layer is transparent polyester type adhesive (available from my company), and the thickness is 0.025 mm; the heat dissipation layer is an aluminum foil layer, and the thickness of the heat dissipation layer is 0.01 mm; the first adhesive layer is made of transparent polyester type adhesive (owned by the owner of the source) and is 0.025mm in thickness, and the weather-resistant layer is a polyvinylidene fluoride film (owned by the owner of the source) and is 0.003mm in thickness.
The method for manufacturing the solar cell module in this example is the same as that of example 1.
Example 5
The only difference from example 2 was that the thickness of the first adhesive layer and the second adhesive layer was 0.001mm, and the remaining composition was the same as example 1.
Example 6
The only difference from example 2 is that the weatherable layer has a thickness of 0.001mm and the composition is the same as in example 1.
Comparative example 1
The only difference from example 2 was that the red adhesive layer was replaced with a white adhesive layer, and the remaining composition was the same as in example 2.
Comparative example 2
The only difference from example 2 was that the red adhesive layer was not included, and the remaining composition was the same as example 2.
The solar panels obtained in examples 1 to 6 and comparative examples 1 to 2 were subjected to the following performance tests, the test standards or test methods being as follows:
BS/EVA adhesion: the test method of the peeling force between the back plate and the EVA refers to a 180-degree peeling strength test method of GB-T2790 adhesive;
yellowing resistance: the yellowing coefficient after UV300KWh is tested by a UV aging test box, and the irradiation energy is 300 KWh;
tensile strength: the test method is obtained by testing through a double 85 test box, the test method refers to the test standard of GB/T2423.3, the experimental conditions are 85 ℃, 85% relative humidity and 2000 h;
elongation at break: the test method is obtained by testing through a double 85 test box, the test method refers to the test standard of GB/T2423.3, the experimental conditions are 85 ℃, 85% relative humidity and 2000 h;
the test results are shown in table 1:
TABLE 1
Among them, resistance to yellowingaRefers to the yellowing resistance coefficient of UV300 KWh;
tensile strengthbRefers to the double 852000H tensile strength (MD/TD);
elongation at breakcRefers to the elongation at break of bis 852000H.
As can be seen from table 1, the solar cell back plate obtained by the present invention has good adhesion, heat dissipation and aging resistance, and at the same time has beautiful appearance; wherein the stripping force of BS/EVA can reach 115N, the yellowing resistance coefficient of the air surface can reach 0.6, the tensile strength (MD/TD) of double 852000H can reach 139/135, the elongation at break of double 852000H can reach 121/128, and the color can be set according to actual needs; as can be seen from the comparison between example 1 and example 5, when the thicknesses of the first adhesive layer and the second adhesive layer are too low, the peeling effect is affected; as can be seen from the comparison between example 1 and example 6, when the thickness of the weather-resistant layer is too low, the yellowing resistance coefficient of the air surface is affected; as can be seen from the comparison between example 1 and comparative example 1, when the red bonding layer is replaced by the white bonding layer, the performance of the solar cell back sheet is not greatly affected, but the coordination between the solar cell back sheet and the surrounding buildings is poor in aesthetic property; as can be seen from the comparison of example 1 and comparative example 2, when the solar cell back sheet does not include a red bonding layer, the air yellowing resistance coefficient may be reduced, and there may be a poor harmonized aesthetic degree with surrounding buildings.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (7)
1. The solar cell backboard is characterized by comprising a color bonding layer (1), a substrate layer (2), a second adhesive layer (6), a heat dissipation layer (5), a first adhesive layer (3) and a weather-resistant layer (4) which are sequentially connected;
the thickness of the heat dissipation layer (5) is 0.05-3.5mm, and the thickness of the second adhesive layer (6) is 0.003-0.025 mm.
2. The solar cell backsheet according to claim 1, wherein the thickness of the colored adhesive layer (1) is 0.001 to 0.04 mm.
3. The solar cell backsheet according to claim 1, wherein the base layer (2) is a PET film layer, and the thickness of the base layer (2) is 0.06 to 1.1 mm.
4. The solar cell backsheet according to claim 1, wherein the thickness of the first adhesive layer (3) is 0.003-0.025 mm.
5. The solar cell backsheet according to claim 1, wherein the weatherable layer (4) has a thickness of 0.003-0.06 mm.
6. A solar cell module, characterized in that the solar cell module comprises a front glass layer (100), a first packaging layer (101), a cell sheet layer (102), a second packaging layer (103) and a back sheet layer (104) which are connected in sequence, wherein the back sheet layer (104) is the solar cell back sheet according to any one of claims 1 to 5.
7. The solar module according to claim 6, characterized in that the second encapsulant layer (103) of the solar module is connected to the adhesive layer (1) in the backsheet layer (104).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921833788.9U CN212783477U (en) | 2019-10-29 | 2019-10-29 | Solar cell backboard and solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921833788.9U CN212783477U (en) | 2019-10-29 | 2019-10-29 | Solar cell backboard and solar cell module |
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| CN212783477U true CN212783477U (en) | 2021-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420781A (en) * | 2022-01-11 | 2022-04-29 | 苏州赛伍应用技术股份有限公司 | Blue high-reflection solar cell backboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420781A (en) * | 2022-01-11 | 2022-04-29 | 苏州赛伍应用技术股份有限公司 | Blue high-reflection solar cell backboard |
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