CN212874496U - Membrane electrode and photovoltaic module with same - Google Patents
Membrane electrode and photovoltaic module with same Download PDFInfo
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- CN212874496U CN212874496U CN202021572173.8U CN202021572173U CN212874496U CN 212874496 U CN212874496 U CN 212874496U CN 202021572173 U CN202021572173 U CN 202021572173U CN 212874496 U CN212874496 U CN 212874496U
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- 239000012528 membrane Substances 0.000 title claims abstract description 57
- 238000002834 transmittance Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052709 silver Inorganic materials 0.000 abstract description 8
- 239000004332 silver Substances 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 55
- 210000004027 cell Anatomy 0.000 description 40
- 238000003466 welding Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- -1 gallium arsenide Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000110 poly(aryl ether sulfone) Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 230000004075 alteration Effects 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a membrane electrode and photovoltaic module who has it, membrane electrode includes: the light transmittance of the conductive film is k, and k satisfies: k is more than or equal to 85 percent; the conductive film comprises a conductive connecting layer and a supporting layer which are sequentially arranged along the direction far away from the plurality of interconnected structural members, and the conductive connecting layer is connected with the plurality of interconnected structural members. According to the utility model discloses a membrane electrode, the electric current that the battery piece produced can effectively be collected to the conducting film and conduction to a plurality of interconnect structure spare to improve photovoltaic module such as heterojunction subassembly's output. Moreover, the light transmittance of the conductive film is high, so that the photovoltaic module is further ensured to have high output power, and the appearance attractiveness of the whole photovoltaic module can be ensured. In addition, the membrane electrode can reduce the use amount of silver paste, thereby reducing the cost of a photovoltaic module such as a heterojunction module.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic manufacturing technology and specifically relates to a membrane electrode and photovoltaic module who has it are related to.
Background
In the related art, a plurality of sub-grid lines and a plurality of main grid lines connected with the plurality of sub-grid lines are arranged on the front side and the back side of a battery piece, so that current generated by the battery piece is collected and led out. However, since the main gate line and the sub-gate line are usually formed by silver paste printing, the usage amount of the silver paste of the sub-gate line and the main gate line is large, and thus the cost of the photovoltaic module is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a membrane electrode, which can reduce the usage amount of silver paste while collecting and guiding the current generated by the cell, thereby reducing the cost and having higher light transmittance.
Another object of the present invention is to provide a photovoltaic module having the above membrane electrode.
According to an embodiment of the first aspect of the present invention, a membrane electrode comprises: a conductive film having a light transmittance k, wherein k satisfies: k is more than or equal to 85 percent; the conductive film comprises a conductive connecting layer and a supporting layer which are sequentially arranged along the direction far away from the plurality of interconnected structural members, and the conductive connecting layer is connected with the plurality of interconnected structural members.
According to the utility model discloses membrane electrode is through setting up luminousness more than or equal to 85%'s conductive film and a plurality of interconnect structure to make every interconnect structure be connected with the conductive film, when membrane electrode is applied to photovoltaic module for example heterojunction subassembly, the current that the battery piece produced can effectively be collected to the conductive film and conduction to a plurality of interconnect structure, and a plurality of interconnect structure can be derived the current, thereby improve photovoltaic module for example heterojunction subassembly's output. Moreover, the light transmittance of the conductive film is high, so that the absorption loss of the cell to light can be effectively reduced, the photovoltaic module such as a heterojunction module is further ensured to have high output power, and the appearance attractiveness of the whole photovoltaic module can be ensured. In addition, the membrane electrode can reduce the use amount of silver paste, thereby reducing the cost of a photovoltaic module such as a heterojunction module. In addition, the conducting film comprises the conducting connecting layer and the supporting layer which are sequentially arranged along the direction away from the plurality of interconnection structural members, the conducting connecting layer can improve the current collecting efficiency, the interconnection structural members are more firmly connected with the battery pieces, the supporting layer can play an effective supporting and protecting role, and the membrane electrode can be conveniently arranged.
According to some embodiments of the invention, the thickness of the conductive connection layer is greater than the thickness of the support layer.
According to some embodiments of the present invention, the thickness of the conductive connection layer is h, wherein h satisfies: h is more than or equal to 20 mu m and less than or equal to 60 mu m.
According to some embodiments of the present invention, the conductive connection layer is a polyarylethersulfone copolymer and its derivative composite material, and the support layer is a PET.
According to some embodiments of the present invention, the conductive film and the contact resistivity between the interconnect structure is ρ, wherein ρ satisfies: rho is less than 1.5m omega cm2。
According to the utility model discloses a some embodiments, the conducting film is with a plurality of interconnect structure adhesive bonding, the conducting film is with a plurality of adhesive force between the interconnect structure is F, wherein, F satisfies: f is more than 1N/mm.
According to some embodiments of the invention, each of the interconnected structural members has a melting point temperature T, wherein T satisfies: t is more than or equal to 110 ℃ and less than or equal to 160 ℃.
According to the utility model discloses photovoltaic module of second aspect embodiment includes: a plurality of battery pieces; a plurality of membrane electrodes, the membrane electrode is according to the utility model discloses above-mentioned first aspect embodiment, the membrane electrode is established correspondingly on at least one side surface of battery piece, the membrane electrode the conducting film cover a plurality of interconnect structure's partial outer peripheral face and the battery piece face a side surface of membrane electrode, the conducting film is with a plurality of interconnect structure all with correspond the battery piece electricity is connected.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a conductive film of a membrane electrode according to an embodiment of the present invention;
figure 2 is a schematic cross-sectional view of an interconnect structure for a membrane electrode according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of an interconnect structure according to another embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of an interconnect structure according to yet another embodiment of the present invention;
figure 5 is a cross-sectional schematic view of an interconnect structure according to yet another embodiment of the present invention;
fig. 6 is a schematic sectional structure view of a photovoltaic module according to an embodiment of the present invention.
Reference numerals:
100: a membrane electrode;
1: a conductive film; 11: a conductive connection layer;
12: a support layer; 2: an interconnecting structural member;
200: a photovoltaic module;
201: a battery piece; 2011: a main gate electrode.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
A membrane electrode 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 6. The membrane electrode 100 may be applied to a photovoltaic module 200 such as a Heterojunction (HJT, Heterojunction with Intrinsic thin film, a special PN junction formed by sequentially depositing two or more layers of different semiconductor material films on the same substrate, the materials having different energy band gaps, and the materials may be a compound such as gallium arsenide, or a semiconductor alloy such as silicon-germanium). In the following description of the present application, the application of the membrane electrode 100 to a heterojunction assembly is exemplified. Of course, it will be understood by those skilled in the art that the membrane electrode 100 may also be applied to other types of photovoltaic modules 200, and is not limited to heterojunction modules.
As shown in fig. 6, a membrane electrode 100 according to an embodiment of the present invention includes a conductive film 1 and a plurality of interconnecting structural members 2. In the description of the present invention, "a plurality" means two or more.
The light transmittance of the conductive film 1 is k, where k satisfies: k is more than or equal to 85 percent. Therefore, the light transmittance of the conductive film 1 is high, and more than 85% of sunlight can penetrate through the conductive film 1 to irradiate the surface of the cell 201 of the photovoltaic module 200, so that the cell 201 of the photovoltaic module 200 can generate current through a photovoltaic effect, thereby effectively reducing the absorption loss of the cell 201 to light and ensuring the output power of the photovoltaic module 200, such as a heterojunction module. Moreover, after the assembly is laminated, the conductive film 1 and the battery piece 201 are of an integral structure, and the transparency of the conductive film 1 is higher due to the high light transmittance of the conductive film 1, so that the overall appearance attractiveness of the battery piece 201 can be ensured.
Specifically, a plurality of interconnection structures 2 are provided on one side in the thickness direction of the conductive film 1, and each interconnection structure 2 is connected to the conductive film 1. Thus, when the membrane electrode 100 is applied to a photovoltaic module 200 such as a heterojunction module, on the one hand, the current generated by the cell sheet 201 of the heterojunction module can be conducted to the plurality of interconnection structures 2 through the conductive film 1 and finally conducted out by the plurality of interconnection structures 2, so that the output power of the heterojunction module can be increased; on the other hand, the membrane electrode 100 thus arranged can save the usage amount of silver paste, thereby reducing the cost of the heterojunction assembly.
Referring to fig. 1 and 6, the conductive film 1 includes a conductive connection layer 11 and a support layer 12 sequentially arranged in a direction facing away from the plurality of interconnection structures 2, the conductive connection layer 11 being connected to the plurality of interconnection structures 2. Wherein the hardness of the support layer 12 may be greater than the hardness of the conductive connection layer 11. For example, the conductive connection layer 11 may be a composite material of polyarylethersulfone copolymer and its derivatives, and the support layer 12 may be a PET (Polyethylene terephthalate, commonly known as polyester resin, which is the most important type of thermoplastic polyester). Therefore, by arranging the conductive connecting layer 11 and the supporting layer 12, the conductive connecting layer 11 can transmit the current generated by the cell 201 of the photovoltaic module 200 to the interconnection structural member 2, so that the current collection efficiency is improved, the supporting layer 12 can play a good supporting role on one hand, and is convenient for the arrangement of the membrane electrode 100, and on the other hand, the conductive connecting layer 11 can be used for protecting the conductive connecting layer 11, so that the current collection efficiency of the membrane electrode 100 is ensured, and the photovoltaic module 200, such as a heterojunction module, has higher output power.
According to the utility model discloses membrane electrode 100, through setting up luminousness more than or equal to 85%'s conducting film 1 and a plurality of interconnect structure 2 to make every interconnect structure 2 be connected with conducting film 1, when membrane electrode 100 is applied to photovoltaic module 200 such as heterojunction assembly, conducting film 1 can effectively collect the electric current that cell 201 produced and conduct to a plurality of interconnect structure 2, and a plurality of interconnect structure 2 can derive the electric current, thereby improve photovoltaic module 200 such as heterojunction assembly's output. Moreover, the light transmittance of the conductive film 1 is high, so that the absorption loss of the cell 201 to light can be effectively reduced, the photovoltaic module 200, such as a heterojunction module, is further ensured to have high output power, and the appearance attractiveness of the whole photovoltaic module can be ensured. In addition, the membrane electrode 100 can reduce the usage amount of silver paste, thereby reducing the cost of the photovoltaic module 200, such as a heterojunction module. In addition, by making the conductive film 1 include the conductive connection layer 11 and the support layer 12 that are sequentially disposed in a direction away from the plurality of interconnection structures 2, the conductive connection layer 11 can improve the current collection efficiency, and make the connection between the interconnection structures 2 and the cell 201 more secure, and the support layer 12 can play an effective supporting and protecting role, facilitating the arrangement of the membrane electrode 100.
Alternatively, in conjunction with fig. 1 and 6, the thickness of the conductive connection layer 11 may be greater than the thickness of the support layer 12. With the arrangement, the thickness of the conductive connecting layer 11 is large, so that current generated by the cell 201 of the photovoltaic module 200 can be effectively transmitted, and the photovoltaic module 200, such as a heterojunction module, is ensured to have high output power. Moreover, the thickness of the support layer 12 is smaller than that of the conductive connection layer 11, so that the light transmittance of the whole conductive film 1 is prevented from being affected while the support effect is achieved, and the output power of the photovoltaic module 200 can be further improved.
In some embodiments of the present invention, the thickness of the conductive connection layer 11 is h1The thickness of the support layer 12 is h2Wherein h is1、h2Respectively satisfy: h is less than or equal to 20 mu m1≤60μm，10μm≤h2Less than or equal to 20 mu m. Specifically, for example, when h1Conductive connection layer less than 20 μmThe thickness of the conductive connecting layer 11 is too small, so that the current generated by the cell 201 of the photovoltaic module 200 may not be effectively transmitted, and the strength of the conductive connecting layer 11 may be too low, so that the conductive connecting layer is easy to damage and has low reliability; when h is generated1At > 60 μm, the thickness of the conductive connection layer 11 is too large, and the light transmittance of the entire conductive film 1 may be reduced, thereby reducing the output power of the photovoltaic module 200, such as a heterojunction module. When h is generated2When the thickness of the supporting layer 12 is less than 10 micrometers, the supporting layer 12 may not play an effective supporting and protecting role, so that the laying difficulty of the conductive film 1 is large, the conductive connecting layer 11 is easy to damage, and the reliability is low; when h is generated2At > 20 μm, the thickness of the support layer 12 is too large, which may make the conductive film 1 not easy to be attached to the cell sheet 201 of the photovoltaic device 200, and may reduce the light transmittance of the entire conductive film 1, thereby reducing the output power of the photovoltaic device 200, such as a heterojunction device. Thereby, by making h1、h2Respectively satisfy: h is less than or equal to 20 mu m1≤60μm，10μm≤h2Less than or equal to 20 microns, when the membrane electrode 100 is applied to a photovoltaic assembly 200 such as a heterojunction assembly, the photovoltaic assembly 200 is ensured to have higher output power, meanwhile, the conductive film 1 is convenient to lay, the reliability is higher, the conductive connecting layer 11 can effectively transmit the current generated by the cell sheet 201, and the supporting layer 12 can effectively support and protect the conductive connecting layer 11.
In some embodiments of the present invention, the contact resistivity between the conductive film 1 and the interconnection structure 2 is ρ, where ρ satisfies: rho is less than 1.5m omega cm2. For example, when ρ ≧ 1.5m Ω · cm2In this case, the contact resistivity between the conductive film 1 and the interconnection structure 2 is too high, and the current generated by the cell 201 of the photovoltaic device 200 may not be effectively transmitted to the interconnection structure 2 through the conductive film 1, so that the current loss may be caused, and the output power of the photovoltaic device 200, such as a heterojunction device, may be affected. Thus, by letting ρ satisfy: rho is less than 1.5m omega cm2The current transfer efficiency between the conductive film 1 and the interconnection structure 2 can be ensured, so that the current generated by the cell 201 of the photovoltaic module 200 can be effectively transferred to the interconnection structure 2 through the conductive film 1, and the photovoltaic module 200, such as a heterojunction module, can be ensured to have high output power.
The utility model discloses an in some embodiments, conductive film 1 and a plurality of interconnected structure 2 adhesive connection, the adhesion between conductive film 1 and a plurality of interconnected structure 2 is F, and wherein, F satisfies: f is more than 1N/mm. By the arrangement, the conductive film 1 and the plurality of interconnection structural members 2 can be firmly connected, one side surface of the conductive film 1 facing the interconnection structural members 2 can be tightly attached to the plurality of interconnection structural members 2, the conductive film 1 is prevented from being separated from the plurality of interconnection structural members 2 to influence current transmission, the photovoltaic module 200 such as a heterojunction module is ensured to have higher output power, and the bonding mode is easy to operate and has lower cost.
In some embodiments of the present invention, the melting point temperature of each interconnect structure 2 is T, where T satisfies: t is more than or equal to 110 ℃ and less than or equal to 160 ℃. Specifically, for example, when T < 110 ℃, the melting point temperature of the interconnection structure 2 is too low and brittleness is large, so that reliability of the interconnection structure 2 is low; when T > 160 ℃, the melting point temperature of the interconnection structure 2 is too high, so that the soldering temperature of the interconnection structure 2 is high, which may result in a high defective rate of the cell sheet 201 of the photovoltaic module 200 and a cold joint may exist. Thus, by making T satisfy: t is more than or equal to 110 ℃ and less than or equal to 160 ℃, and the melting point temperature of the interconnection structural member 2 is reasonable, so that the yield of the photovoltaic module 200, such as a cell 201 of a heterojunction module, can be improved, the generation of cold solder joint is avoided, the low-temperature brittleness can be reduced, and the reliability of the interconnection structural member 2 is improved.
Alternatively, as shown in fig. 2-4, each of the interconnecting structural members 2 may be an interconnecting structural member 2 having a circular cross-sectional shape, an interconnecting structural member 2 having a triangular cross-sectional shape, an interconnecting structural member 2 having a rectangular cross-sectional shape, or the like. Therefore, when the cross section of the interconnection structural member 2 is circular, continuous welding with the cell 201 of the photovoltaic module 200 can be realized, series resistance can be reduced, and the risk of subfissure of the cell 201 of the photovoltaic module 200 is reduced; when the cross section of the interconnecting structural member 2 is triangular, the interconnecting structural member 2 has good welding performance and good reflection effect, and can improve the conversion efficiency; when the cross-sectional shape of the interconnection structure 2 is rectangular, the interconnection structure 2 is flat, has a small thickness, has good soldering performance, and can achieve continuous soldering with the photovoltaic module 200, for example, the cell sheet 201 of the heterojunction module.
Of course, the present invention is not limited to this, and referring to fig. 5, the interconnecting structural member 2 may also be a combination of the interconnecting structural member 2 having a triangular cross-sectional shape and the interconnecting structural member 2 having a rectangular cross-sectional shape. For example, in the example of fig. 5, the interconnect structure 2 includes a triangular interconnect structure segment and a rectangular interconnect structure segment, wherein the triangular interconnect structure segment has a triangular cross-sectional shape and the rectangular interconnect structure segment has a rectangular cross-sectional shape. The triangular interconnection structure segments and the rectangular interconnection structure segments are connected to each other in the length direction of the interconnection structure 2. For example, the rectangular interconnection structure section can be connected to the back of the cell 201, the welding area between the rectangular interconnection structure section and the cell 201 is large, and the welding tension can be improved, so that the reliability of the photovoltaic module 200 can be ensured, and the rectangular interconnection structure section does not occupy the front area of the cell 201. The triangular interconnection structure section is connected to the front side of the adjacent cell 201, and light irradiated on the triangular interconnection structure section can be finally reflected to the cell 201, so that the optical utilization rate of the front side of the photovoltaic module 200 can be effectively improved, and the power of the photovoltaic module 200, such as a heterojunction module, is improved. With such an arrangement, while the interconnected structural member 2 is ensured to have better welding performance, continuous welding with the cell 201 can be realized, and the optical utilization rate of the photovoltaic module 200, such as a heterojunction module, can be effectively improved.
Further, when the cross-sectional shape of the interconnecting structural member 2 is circular, the diameter of the interconnecting structural member 2 is d, wherein d satisfies: d is more than or equal to 0.15mm and less than or equal to 0.35 mm. Specifically, for example, when d is less than 0.15mm, the diameter of the interconnection structure 2 is too small, and poor welding such as cold welding may occur between the interconnection structure and the cell sheet 201 of the photovoltaic module 200; when d is greater than 0.35mm, the diameter of the interconnecting structural member 2 is too large, which may increase the shielding area of the cell sheet 201 and affect the conversion efficiency of the photovoltaic module 200. Thus, d satisfies: d is more than or equal to 0.15mm and less than or equal to 0.35mm, the welding quality between the interconnection structural member 2 and the cell 201 of the photovoltaic module 200 is ensured, meanwhile, the shielding of the cell 201 can be reduced, and therefore the photovoltaic module 200 such as a heterojunction module is ensured to have higher output power.
A photovoltaic module 200 according to an embodiment of the present invention, for example, a heterojunction module, as shown in fig. 6, includes a plurality of cell sheets 201 and a plurality of membrane electrodes 100. Specifically, the membrane electrode 100 is the membrane electrode 100 according to the above first aspect of the present invention, the membrane electrode 100 is disposed on at least one side surface of the corresponding cell sheet 201, the conductive film 1 of the membrane electrode 100 covers part of the outer peripheral surface of the plurality of interconnection structural members 2 and one side surface of the cell sheet 201 facing the membrane electrode 100, and the conductive film 1 and the plurality of interconnection structural members 2 are electrically connected to the corresponding cell sheet 201.
For example, in the example of fig. 6, the cell 201 may include a cell body and a main grid electrode 2011 provided on the cell body. The membrane electrode 100 is covered on the cell 201, and the conductive film 1 is in contact with both the cell body and the main gate electrode 2011. Therefore, the current generated by the above-mentioned one side surface of the cell 201 can be conducted to the interconnection structural member 2 through the conductive film 1, or conducted to the main grid electrode 2011 through the conductive film 1 and conducted to the interconnection structural member 2 through the main grid electrode 2011, so that the current generated by the cell 201 can be better extracted and conducted, and the output power of the photovoltaic module 200, such as a heterojunction module, is improved.
According to the photovoltaic module 200 of the embodiment of the present invention, for example, a heterojunction module, by using the above-mentioned membrane electrode 100, the conductive film 1 can effectively collect the current generated by the cell 201 and conduct the current to the plurality of interconnection structures 2, and the plurality of interconnection structures 2 can conduct the current out, thereby improving the output power of the photovoltaic module 200, for example, the heterojunction module. Furthermore, the membrane electrode 100 can reduce the amount of silver paste used, thereby reducing the cost of the photovoltaic module 200, such as a heterojunction module.
Alternatively, the area of the conductive film 1 may be equal to or slightly smaller than the area of the one-side surface of the battery piece 201, that is, the conductive film 1 may completely cover the one-side surface of the battery piece 201 and may cover a part of the one-side surface of the battery piece 201. Therefore, the cost can be reduced while effectively conducting the current.
Other constructions and operations of the photovoltaic module 200 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A membrane electrode, comprising:
a conductive film having a light transmittance k, wherein k satisfies: k is more than or equal to 85 percent;
the conductive film comprises a conductive connecting layer and a supporting layer which are sequentially arranged along the direction far away from the plurality of interconnected structural members, and the conductive connecting layer is connected with the plurality of interconnected structural members.
2. The membrane electrode of claim 1, wherein the thickness of the electrically conductive connection layer is greater than the thickness of the support layer.
3. The membrane electrode of claim 1, wherein the electrically conductive connection layer has a thickness h, wherein h satisfies: h is more than or equal to 20 mu m and less than or equal to 60 mu m.
4. The membrane electrode of claim 1, wherein the support layer is a piece of PET.
5. The membrane electrode according to any one of claims 1 to 4, wherein a contact resistivity between the conductive film and the interconnect structure is ρ, where ρ satisfies: rho is less than 1.5m omega cm2。
6. The membrane electrode assembly according to any one of claims 1 to 4, wherein the conductive film is adhesively connected to the plurality of interconnection structures, and an adhesive force between the conductive film and the plurality of interconnection structures is F, wherein F satisfies: f is more than 1N/mm.
7. A membrane electrode assembly according to any one of claims 1 to 4, wherein the melting point temperature of each of the interconnecting structural members is T, wherein T satisfies: t is more than or equal to 110 ℃ and less than or equal to 160 ℃.
8. A photovoltaic module, comprising:
a plurality of battery pieces;
a plurality of membrane electrodes according to any one of claims 1 to 7 provided on at least one side surface of the corresponding cell piece, the conductive membrane of the membrane electrode covering partial outer peripheral surfaces of the plurality of interconnection structures and one side surface of the cell piece facing the membrane electrode, the conductive membrane and the plurality of interconnection structures each being electrically connected to the corresponding cell piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021572173.8U CN212874496U (en) | 2020-07-31 | 2020-07-31 | Membrane electrode and photovoltaic module with same |
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| CN202021572173.8U CN212874496U (en) | 2020-07-31 | 2020-07-31 | Membrane electrode and photovoltaic module with same |
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| CN212874496U true CN212874496U (en) | 2021-04-02 |
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