CN210607279U - Conductive film, solar cell string and photovoltaic module - Google Patents
Conductive film, solar cell string and photovoltaic module Download PDFInfo
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- CN210607279U CN210607279U CN201921430136.0U CN201921430136U CN210607279U CN 210607279 U CN210607279 U CN 210607279U CN 201921430136 U CN201921430136 U CN 201921430136U CN 210607279 U CN210607279 U CN 210607279U
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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 conductive film, solar cell cluster and photovoltaic module, conductive film includes: the transparent conductive adhesive layer, the aluminum foil layer and the conductive back adhesive layer; wherein, transparent conductive adhesive layer coating is in the first face on aluminium foil layer, electrically conductive gum layer coating is in the second face on aluminium foil layer, first face is relative with the second face, two adjacent solar wafer are connected to above-mentioned conductive film mainly used, because transparent conductive adhesive layer luminousness is higher, light through transparent conductive adhesive layer can shine on the aluminium foil layer, again because the aluminium foil layer has higher reflectivity, can reflect above-mentioned light to solar wafer, the reutilization rate of solar wafer to the light has been improved, photovoltaic module's generated energy has been increased.
Description
Technical Field
The utility model relates to a solar cell technical field especially relates to a conductive film, solar cell cluster and photovoltaic module.
Background
At present, with the obvious problem of energy shortage, countries around the world pay more attention to clean and pollution-free renewable energy, and photovoltaic modules using solar energy as a green renewable energy are widely used.
In the prior art, the solder strip for connecting adjacent solar cells is mostly a copper-tin solder strip, and the copper-tin solder strip mainly has the following disadvantages:
1. the copper and tin have high heat conductivity coefficient, and need to be welded on the solar cell piece in a high-temperature environment, however, high-temperature welding easily causes thermal stress to the solar cell piece, so that the solar cell piece has a certain degree of warping, and in the subsequent process, the solar cell piece is easily broken or has hidden cracks, so that the manufacturing cost of the photovoltaic module is increased;
2. the resistivity of the copper-tin solder strip is high, so that the series resistance between solar cells is increased, the power loss of the photovoltaic module is increased, and the power generation efficiency of the photovoltaic module is further influenced;
3. after the copper-tin solder strip is welded on the solar cell, the surface is irregular, so that the secondary absorption rate of the solar cell to sunlight is reduced, and the power generation amount of a photovoltaic module is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the problem that copper-tin solder strip coefficient of heat conductivity is high, resistivity is high and the reflectance ratio is poor, the utility model provides a conductive film, solar cell cluster and photovoltaic module.
In order to solve the above problem, the utility model discloses a conductive film for connect two adjacent solar wafer, its characterized in that, conductive film includes: the transparent conductive adhesive layer, the aluminum foil layer and the conductive back adhesive layer; wherein the content of the first and second substances,
the transparent conductive adhesive layer is coated on a first surface of the aluminum foil layer, the conductive back adhesive layer is coated on a second surface of the aluminum foil layer, and the first surface is opposite to the second surface;
the transparent conductive adhesive layer is adhered to the backlight surface of one of the solar cells, and the conductive adhesive layer is adhered to the light receiving surface of the adjacent solar cell.
Optionally, the transparent conductive adhesive layer is made of a polymer containing metal oxide, and the metal oxide is uniformly distributed in the polymer.
Optionally, the polymer is at least one of an epoxy system, an acrylic system or a silicone system;
the metal oxide is at least one of indium oxide, aluminum-doped zinc oxide, fluorine-doped tin oxide or antimony-doped tin oxide.
Optionally, the conductive back glue layer is made of a polymer containing a conductive material, and the conductive material is uniformly distributed in the polymer.
Optionally, the polymer is at least one of an epoxy system, an acrylic system or a silicone system;
the conductive material is at least one of silver powder or silver-coated copper powder.
Optionally, the thickness of the conductive film is 0.1-0.2 mm, and the width of the conductive film is 0.5-1.5 mm.
On the other hand, the utility model also discloses a solar cell cluster, include: a plurality of solar cells and a plurality of the above-mentioned conductive films, wherein,
and the adjacent two solar cells are connected through the conductive film.
On the other hand, the utility model also discloses a photovoltaic module, photovoltaic module includes: a plurality of the above-described solar cell strings.
The utility model discloses a following advantage:
the embodiment of the utility model provides a conductive film, include: the transparent conductive adhesive layer, the aluminum foil layer and the conductive back adhesive layer; wherein, transparent conductive adhesive layer coating is in the first face of aluminium foil layer, and conductive gum layer coating is in the second face of aluminium foil layer, and first face is relative with the second face, and above-mentioned conductive film mainly used connects two adjacent solar wafer, and its advantage mainly has:
1. the transparent conductive adhesive layer is adhered to the backlight surface of one of the solar cells, the conductive adhesive layer is adhered to the light receiving surface of the adjacent solar cell, and the temperature required by adhesion and connection is low, so that the thermal stress of the solar cell is reduced, the warping degree of the solar cell is reduced, and the probability of breakage or hidden cracking of the solar cell is reduced;
2. the transparent conductive adhesive layer and the conductive back adhesive layer have high conductivity, so that series resistance between the solar cells is reduced, power loss of the photovoltaic module is reduced, and the power generation efficiency of the photovoltaic module is improved;
3. because transparent conductive adhesive layer luminousness is higher, the light through transparent conductive adhesive layer can shine on the aluminium foil layer, because the aluminium foil layer has higher reflectivity again, can reflect above-mentioned light to solar wafer, improved the reutilization rate of solar wafer to the light, increased photovoltaic module's generated energy.
Drawings
Fig. 1 is a schematic structural diagram of a conductive film according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention.
10-transparent conductive adhesive layer, 20-aluminum foil layer, 30-conductive back adhesive layer, 40-photovoltaic glass, 50-first adhesive film, 60-solar battery pack, 70-second adhesive film and 80-photovoltaic back panel.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, a schematic structural diagram of a conductive film according to an embodiment of the present invention is shown. As shown in fig. 1, the conductive film is used for connecting two adjacent solar cells, and may specifically include: the solar cell comprises a transparent conductive adhesive layer 10, an aluminum foil layer 20 and a conductive back adhesive layer 30, wherein the transparent conductive adhesive layer 10 is coated on a first surface of the aluminum foil layer 20, the conductive back adhesive layer 30 is coated on a second surface of the aluminum foil layer 20, the first surface is opposite to the second surface, the transparent conductive adhesive layer 10 is adhered on a back surface of one solar cell, and the conductive back adhesive layer 30 is adhered on a light receiving surface of an adjacent solar cell.
The embodiment of the utility model provides an above-mentioned conductive film has following advantage at least in the aspect of connecting two adjacent solar wafer: the conductive film is respectively connected with the two adjacent solar cells in a sticking way through the transparent conductive adhesive layer 10 and the conductive back adhesive layer 30, so that the temperature required by the sticking connection is low, the thermal stress of the solar cells is reduced, the warping degree of the solar cells is reduced, and the probability of breakage or hidden cracking of the solar cells is reduced; the transparent conductive adhesive layer 10 and the conductive back adhesive layer 30 have high conductivity, so that series resistance between solar cells is reduced, power loss of the photovoltaic module is reduced, and power generation efficiency of the photovoltaic module is improved; because transparent conductive adhesive layer 10 luminousness is higher, the light through transparent conductive adhesive layer 10 can shine on aluminium foil layer 20, because aluminium foil layer 20 has higher reflectivity again, can reflect above-mentioned light to solar wafer, has improved the reutilization ratio of solar wafer to the light, has increased photovoltaic module's generated energy.
In the process of actually preparing the conductive film, can carry out surface treatment in the first face of aluminium foil layer 20 earlier, process transparent conductive adhesive layer 10 to the first face of aluminium foil layer 20 through coating process after the processing, carry out surface treatment again at the second face of aluminium foil layer 20, process electrically conductive gum layer 30 to the second face of aluminium foil layer 20 through coating process after the processing to dry, solidify transparent conductive adhesive layer 10 and electrically conductive gum layer 30 on aluminium foil layer 20, compare in the current processing method that the area that welds need pass through wire drawing, calendering etc., the embodiment of the utility model provides an electrically conductive film's processing technology is simpler.
In practical application, the embodiment of the utility model provides a conductive film pastes the solar wafer back through transparent conductive adhesive layer 10 and electrically conductive gum layer 30, needs to carry out solidification treatment, however, the temperature of solidification is mainly about 100 degrees, compares about welded temperature 300 degrees, the utility model provides a when conductive film processes the solar wafer, is less to the influence of solar wafer, can reduce the thermal stress of solar wafer, reduces the warping degree of solar wafer, has reduced the solar wafer fragment or has produced the probability of latent splitting.
In practical application, the material of the transparent conductive adhesive layer 10 and the conductive back adhesive layer 30 is not specifically limited, the material of the transparent conductive adhesive layer 10 only needs to satisfy high transmittance and high conductivity, and the material of the conductive back adhesive layer 30 only needs to satisfy high conductivity.
Optionally, in an embodiment of the present invention, the material of the transparent conductive adhesive layer 10 is a polymer containing metal oxide, and the metal oxide is uniformly distributed inside the polymer, for example, the polymer may be at least one of an epoxy system, an acrylic system, or an organosilicon system, and the metal oxide may be at least one of indium oxide, aluminum-doped zinc oxide, fluorine-doped tin oxide, or antimony-doped tin oxide. Wherein, above-mentioned polymer plays the effect of pasting, foretell metal oxide all has better transparent electric conductive property, and the resistivity is less, when light shines transparent conductive adhesive layer 10, because transparent conductive adhesive layer 10 has better light transmission performance, above-mentioned light can pass transparent conductive adhesive layer 10 and shine aluminium foil layer 20, aluminium foil layer 20 can reflect the light, the light that is reflected is finally reflected on the solar wafer, by solar wafer secondary absorption, the secondary utilization ratio of solar wafer to the light has been improved, photovoltaic module's generated energy has been increased.
Optionally, in the embodiment of the present invention, the material of the conductive back glue layer 30 is a polymer containing a conductive material, and the conductive material is uniformly distributed inside the polymer. Wherein, the conducting material plays the effect of converging and electrically conducting, and the polymer plays the effect of pasting. Specifically, the polymer is at least one of an epoxy system, an acrylic acid system or an organic silicon system, the conductive material is at least one of silver powder or silver-coated copper powder, and the silver powder and the silver-coated copper powder are opaque, so that the conductive back glue layer 30 is adhered to the light receiving surface of the solar cell, light transmission is not needed, and the polymer containing the conductive material with lower cost can be selected to reduce the manufacturing cost of the conductive film.
In practical application, conductive film's thickness and width can set up according to actual need, for example, conductive film's thickness is 0.1 ~ 0.2mm, and conductive film's width is 0.5 ~ 1.5mm, the embodiment of the utility model provides a do not do the restriction to conductive film's specific thickness and specific width.
To sum up, the embodiment of the utility model provides a conductive film have following advantage:
in the embodiment of the utility model provides an in, conductive film includes: the transparent conductive adhesive layer, the aluminum foil layer and the conductive back adhesive layer; wherein, transparent conductive adhesive layer coating is in the first face of aluminium foil layer, and conductive gum layer coating is in the second face of aluminium foil layer, and first face is relative with the second face, and above-mentioned conductive film mainly used connects two adjacent solar wafer, and its advantage mainly has:
1. the transparent conductive adhesive layer is adhered to the light receiving surface of one of the solar cells, the conductive back adhesive layer is adhered to the back light surface of the adjacent solar cell, and the temperature required by adhesion and connection is low, so that the thermal stress of the solar cells is reduced, the warping degree of the solar cells is reduced, and the probability of breakage or hidden cracking of the solar cells is reduced;
2. the transparent conductive adhesive layer and the conductive back adhesive layer have high conductivity, so that series resistance between the solar cells is reduced, power loss of the photovoltaic module is reduced, and the power generation efficiency of the photovoltaic module is improved;
3. because transparent conductive adhesive layer luminousness is higher, the light through transparent conductive adhesive layer can shine on the aluminium foil layer, because the aluminium foil layer has higher reflectivity again, can reflect above-mentioned light to solar wafer, improved the reutilization rate of solar wafer to the light, increased photovoltaic module's generated energy.
The embodiment of the utility model provides a still provide a solar cell cluster, solar cell cluster includes: the solar cell comprises a plurality of solar cells and a plurality of conductive films, wherein two adjacent solar cells are connected through the conductive films. The specific structural form and the working principle of the conductive film have been described in detail in the foregoing embodiments, and the embodiment of the present invention is not repeated herein.
The embodiment of the utility model provides a still provide a photovoltaic module, photovoltaic module includes: a plurality of the above-described solar cell strings. Referring to fig. 2, a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention is shown; as shown in fig. 2, the photovoltaic module includes: the solar cell module comprises photovoltaic glass 40, a first layer of adhesive film 50, a solar cell module 60, a second layer of adhesive film 70 and a photovoltaic back plate 80 which are sequentially arranged, wherein the solar cell module 60 is formed by connecting a plurality of solar cell strings through bus bars, and the solar cell strings are the solar cell strings.
In practical application, the thicknesses of the photovoltaic glass 40, the first adhesive film layer 50, the second adhesive film layer 70 and the photovoltaic back plate 80 can be set according to actual needs, for example, the thickness of the photovoltaic glass 40 is 2-4 mm, the thicknesses of the first adhesive film layer 50 and the second adhesive film layer 70 are both 0.5-0.7 mm, and the thickness of the photovoltaic back plate 80 is 0.25-0.35 mm. The embodiment of the utility model provides a do not do the restriction to the concrete thickness of photovoltaic glass 40, first layer glued membrane 50, second floor glued membrane 70 and photovoltaic backplate 80.
Optionally, the light transmittance of the photovoltaic glass 40 is greater than or equal to 93.8% so as to ensure that light irradiates the solar cell string through the photovoltaic glass 40, and the utilization rate of the photovoltaic module to the light source is improved.
In the actual process of manufacturing the photovoltaic module, firstly, the photovoltaic glass 40 is placed on an operation table, the surface of the photovoltaic glass 40 is cleaned, and then, the first adhesive film layer 50 is centrally laid on the surface of the photovoltaic glass 40; a plurality of solar cells are pasted through a plurality of conductive films to obtain solar cell strings, then the solar cell strings are placed on the first layer of adhesive film 50, the positive electrode and the negative electrode are arranged in a crossed mode, and the solar cell strings are connected in a welding mode through bus bars; next, a second layer of glue film 70 is centrally laid on the solar cell string surface, and a photovoltaic backsheet 80 is placed on the second layer of glue film 70 to form a to-be-laminated member. And (3) placing the lamination piece on a laminating machine for lamination, and installing a frame and a junction box after lamination to obtain the photovoltaic assembly.
In practical application, when light shines on solar wafer's conducting film, light can see through transparent conducting resin layer and shine on the aluminium foil layer, then, the aluminium foil layer can reflect light, shines on photovoltaic glass 40 by the light of reflection, can be reflected on solar wafer by photovoltaic glass 40, and then is absorbed the utilization by solar wafer to can improve the secondary utilization of solar wafer to light, increase photovoltaic module's generated energy.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is given to the dual glass assembly provided by the present invention, and the specific examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (4)
1. A conductive film for connecting two adjacent solar cells, the conductive film comprising: the transparent conductive adhesive layer, the aluminum foil layer and the conductive back adhesive layer; wherein the content of the first and second substances,
the transparent conductive adhesive layer is coated on a first surface of the aluminum foil layer, the conductive back adhesive layer is coated on a second surface of the aluminum foil layer, and the first surface is opposite to the second surface;
the transparent conductive adhesive layer is adhered to the backlight surface of one of the solar cells, and the conductive adhesive layer is adhered to the light receiving surface of the adjacent solar cell.
2. The conductive film according to claim 1, wherein the conductive film has a thickness of 0.1 to 0.2mm and a width of 0.5 to 1.5 mm.
3. A solar cell string, comprising: a plurality of solar cells and a plurality of conductive films according to any one of claims 1 to 2; wherein the content of the first and second substances,
and the adjacent two solar cells are connected through the conductive film.
4. A photovoltaic module, comprising: a plurality of strings of solar cells as claimed in claim 3.
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| CN201921430136.0U CN210607279U (en) | 2019-08-29 | 2019-08-29 | Conductive film, solar cell string and photovoltaic module |
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| CN201921430136.0U CN210607279U (en) | 2019-08-29 | 2019-08-29 | Conductive film, solar cell string and photovoltaic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725317A (en) * | 2021-07-22 | 2021-11-30 | 湖北美格新能源科技有限公司 | Preparation method of solar module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113725317A (en) * | 2021-07-22 | 2021-11-30 | 湖北美格新能源科技有限公司 | Preparation method of solar module |
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