CN111628028A - Back contact solar cell module adopting conductive composite films connected in series - Google Patents
Back contact solar cell module adopting conductive composite films connected in series Download PDFInfo
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- CN111628028A CN111628028A CN202010579340.XA CN202010579340A CN111628028A CN 111628028 A CN111628028 A CN 111628028A CN 202010579340 A CN202010579340 A CN 202010579340A CN 111628028 A CN111628028 A CN 111628028A
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0512—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- 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
Abstract
The invention relates to the photovoltaic field, in particular to a back contact solar cell module adopting conductive composite films in series connection. A back contact solar cell assembly adopting a conductive composite film to be connected in series at least comprises a plurality of back contact solar cells, wherein the light receiving surface of each solar cell is an upper surface, the backlight surface of each solar cell is a lower surface, the backlight surface of each solar cell is provided with a plurality of rows of positive electrode fine grid groups and a plurality of rows of negative electrode fine grid groups, and the plurality of rows of positive electrode fine grid groups and the plurality of rows of negative electrode fine grid groups are sequentially and alternately arranged; each row of positive electrode fine grid group comprises a plurality of positive electrode fine grids, each row of negative electrode fine grid group comprises a plurality of negative electrode fine grids, an insulating area is arranged between every two adjacent positive and negative electrode fine grids, and the conductive composite membrane is further included. The invention has the advantages that: the consumption of the solar cell series connection conductive silver paste is greatly reduced, the current collection distance in the direction of a fine grid is shortened, the bending phenomenon of a cell piece caused by series welding on the same side is eliminated, and the fragment rate is reduced.
Description
Technical Field
The invention relates to the photovoltaic field, in particular to a back contact solar cell module adopting conductive composite films in series connection.
Background
With the widespread application of photovoltaic energy and the continuous breakthrough of photovoltaic technology, photovoltaic energy has been superior to new energy. However, the industry is still continuously developing new technologies to improve the conversion efficiency of solar cells and the output power of modules, reduce the cost and simplify the manufacturing process. Series connection in the preparation process of the solar cell module is regarded as an important restriction point for high efficiency, low cost and reliable development of the solar cell module, and is concerned by industry people. The novel back contact solar cell module series connection adopting the conductive composite film series connection adopts a plurality of conductive wires to form the conductive layer to replace a main grid line, can greatly reduce the consumption of solar cell series conductive silver paste, effectively shorten the current collection distance in the direction of a fine grid, eliminate the bending phenomenon of a cell piece caused by same-side series welding, reduce the fragment rate of the cell piece in the cell preparation process, and simultaneously remove series welding process steps so as to reduce the manufacturing cost.
Disclosure of Invention
The invention provides a back contact solar cell module adopting a conductive composite film series connection, which has the following specific scheme:
a back contact solar cell assembly adopting a conductive composite film to be connected in series at least comprises a plurality of back contact solar cells, wherein the light receiving surface of each solar cell is the upper surface, the backlight surface is the lower surface, the backlight surface of each solar cell is provided with a plurality of rows of positive electrode fine grid groups and a plurality of rows of negative electrode fine grid groups, and the plurality of rows of positive electrode fine grid groups and the plurality of rows of negative electrode fine grid groups are sequentially and alternately arranged; each row of positive electrode fine grid group comprises a plurality of positive electrode fine grids, an insulating region is arranged between every two adjacent positive electrode fine grids, each row of negative electrode fine grid group comprises a plurality of negative electrode fine grids, an insulating region is arranged between every two adjacent negative electrode fine grids, the positive electrode fine grids in each row of positive electrode fine grid group and the negative electrode fine grids in the negative electrode fine grid group adjacent to the positive electrode fine grid group are arranged in a staggered mode, and the polarities of the electrode fine grid groups of every two adjacent solar cells in the same horizontal direction are opposite; the solar cell comprises a back contact solar cell and is characterized by also comprising a conductive composite film, wherein a plurality of rows of conductive wires are arranged on the conductive composite film, the conductive wires are matched with electrode patterns of the back contact solar cell or the typesetting of the solar cell, and a positive electrode fine grid group on one solar cell is connected with a negative electrode fine grid group on the adjacent solar cell by the same conductive wire; the conductive composite film fixes the conductive wire on the backlight surface of the solar cell.
Preferably, the device also comprises at least one positive bus bar and one negative bus bar, wherein the positive bus bar is connected with the conductive wire on the positive fine grid to form ohmic connection; and the negative bus bar is connected with the negative electrode through the conducting wire on the negative fine grid to form ohmic connection.
Preferably, the conductive composite film comprises a conductive layer, an adhesive layer and a supporting layer in sequence from top to bottom; wherein the conductive layer is composed of a plurality of conductive wires; the adhesive layer fixes the conducting layer and the supporting layer on the backlight surface of the solar cell.
The conducting wire covers each solar cell, is perpendicular to the positive and negative fine grids on the solar cell, and the arrangement rule of the grid lines at the chamfer positions of the solar cells follows the arrangement rule of the grid lines at the non-chamfer positions.
Preferably, the conductive wire may be circular or semicircular or triangular or trapezoidal or square.
Preferably, the number of the conducting wires of the conducting layer in the conducting composite film is 24-36 rows, and the cross section area is 0.2mm2-0.04mm 2; the outer surface of the lead is provided with a coating, and the thickness of the coating is 5-20 mu m.
Preferably, the number of the conducting wires of the conducting layer in the conducting composite film is 150-450 rows, and the sectional area is 0.0016mm2-0.0010 mm 2; the thickness of the coating is 5-30 μm.
Preferably, the coating is one or more of bismuth tin alloy, tin aluminum bismuth alloy, tin bismuth silver alloy, tin bismuth lead alloy, conductive carbon glue and conductive silver glue.
The adhesive layer in the conductive composite film has thermal adhesiveness, the melting point of the adhesive layer is 70-130 ℃, the thickness of the adhesive layer is 10-30 mu m, and the material of the adhesive layer is one or more of EVA, POE, TPO or TPU.
Wherein, EVA is ethylene-vinyl acetate copolymer, POE is ethylene and octene copolymer, TPO is olefin copolymer, TPU is polyurethane copolymer.
Preferably, the material of the support layer in the conductive composite film is one or more of PO, PVDF, PET, PVF, THV, PA, TPT and TPE.
Wherein PO is polyvinylidene fluoride, PVDF is ethylene terephthalate, PET is polyvinyl fluoride, PVF is polyvinyl fluoride, THV is tetrafluoroethylene-hexafluoroethylene-vinylidene fluoride copolymer, PA is polyamide, TPT is polyvinyl fluoride copolymer, and TPE is styrene-butadiene-styrene block copolymer.
Preferably, the thickness of the supported layer is 20-50 μm.
In the back contact solar cell module, assuming that the initial row of a first solar cell is a positive electrode fine grid group, the odd rows are positive electrode fine grid groups, the even rows are negative electrode fine grid groups, the initial row of an adjacent second solar cell is a negative electrode fine grid group, wherein the odd rows of the second solar cell are negative electrode fine grid groups, and the even rows are positive electrode fine grid groups;
the conductive composite film is covered on all back contact solar cells, the conductive wires on the conductive composite film are matched with the electrode patterns of the back contact solar cells or the solar cell typesetting,
suppose, among them, the first solar cell initial row is a positive electrode fine grid group, the first row positive electrode fine grid group includes N positive electrode fine grids and N insulating regions, and the initial electrode fine grid is a positive electrode fine grid, i.e., the positive electrode fine grid is at 1, 3, 5 … … 2N-1 at the position of the positive electrode fine grid group, and the insulating region is at 2, 4, 6 … … 2N at the position of the positive electrode fine grid group.
The second row of the negative electrode fine grid group comprises N negative electrode fine grids and N insulation regions, and the second row starts to be an insulation region, namely the position of the negative electrode fine grid in the negative electrode fine grid group is 2, 4, 6 … … 2N, the position of the insulation region in the negative electrode fine grid group is 1, 3, 5 … … 2N-1, namely the positive electrode fine grid in the first row of the positive electrode fine grid group corresponds to the insulation region in the second row of the negative electrode fine grid group, and the insulation region in the first row of the positive electrode fine grid group corresponds to the negative electrode fine grid in the second row of the negative electrode fine grid group.
The positive electrode fine grid group of the initial row of the first solar cell piece is connected with the negative electrode fine grid group of the initial row of the second solar cell piece through the same conductive wire, the negative electrode fine grid group of the second row of the first solar cell piece is connected with the negative bus bar to form ohmic connection, and so on, and the connection modes of all the odd rows are the same; and the positive electrode fine grid group of the second row of the second solar cell is connected with the negative electrode fine grid group of the second row of the third solar cell in an ohmic connection mode through the same conductive wire, and so on, the connection modes of all even rows are the same, the positive electrode of the last solar cell is connected with the positive electrode bus bar, and the current direction flows from the positive electrode fine grid group to the negative electrode fine grid group.
If the initial behavior is negative electrode fine grid, the opposite is true.
The surfaces of the positive and negative electrode fine grid groups of each row are respectively provided with a conductive area and an insulating area. The conductive area on the surface of each row of positive electrode fine grids and the insulating area on the surface of the adjacent negative electrode fine grid group have crossed areas in the direction vertical to the fine grids; the arrangement rule of the grid lines at the chamfer positions of the cells follows the arrangement rule of the grid lines at the non-chamfer positions.
The conductive wire on the conductive composite film is required to be in cross contact with a conductive area on the surface of the back contact solar cell anode or cathode fine grid, the supporting layer fixes the conductive layer on the cell through the adhesive layer, and the conductive wire is ensured to form ohmic contact with the conductive area.
The invention has the advantages that:
the utility model provides a novel back of body contact solar cell module series connection this novel back of body contact solar cell module series connection adopts a plurality of conductor wires to form the conducting layer and has replaced the main grid line, can reduce the consumption of solar cell series connection conductive silver thick liquid by a wide margin and shortened the distance that thin grid direction electric current was collected effectively, eliminates the crooked phenomenon of battery piece that homonymy series welding arouses, has reduced battery preparation in-process battery piece rate, thereby gets rid of the series welding process step simultaneously and reduces manufacturing cost.
Drawings
FIG. 1 is a block diagram of a back contact solar cell module according to the present invention;
fig. 2 is a structure diagram of a back surface of a back contact solar cell sheet in example 1;
fig. 3 is a schematic view of a series structure of a back contact solar cell module in example 1;
FIG. 4 is a schematic cross-sectional view of a back contact solar cell;
FIG. 5 is an enlarged view of the structure of the conductive composite film;
fig. 6 is a structure diagram of a backlight surface of a back contact solar cell in example 2;
the reference signs are 1-conductive wire, 2-adhesive layer, 3-supporting layer, 4-conductive area on the surface of positive fine grid, 5-conductive area on the surface of negative fine grid, 6-insulating area, 7-solar cell, 8-bus bar, 9-glass substrate, 10-adhesive film layer, 11-back plate and 12-conductive composite film.
Detailed Description
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
example 1
As shown in fig. 1, the tandem back contact solar cell module using the conductive composite film is formed by laminating a glass substrate 9, an ethylene-vinyl acetate copolymer adhesive film layer 10, a back sheet 11, a back contact cell 7, a bus bar 8 and a conductive composite film 12.
The structure of the back contact cell sheet 7 is shown in fig. 2, the lower surface of the back contact solar cell 7 is provided with 6 rows of positive electrode fine grid groups and 5 rows of negative electrode fine grid groups, wherein the positive electrode fine grid groups and the negative electrode fine grid groups are mutually equidistant and alternately arranged; each row of positive electrode fine grid group comprises 6 positive electrode fine grids, an insulating region 6 is arranged between every two adjacent positive electrode fine grids, the width of each section of insulating region 6 is 1mm, each row of negative electrode fine grid group comprises 7 negative electrode fine grids, an insulating region 5 is also arranged between every two adjacent negative electrode fine grids, and the width of each section of insulating region 5 is 1 mm. The negative electrode fine grids in the negative electrode fine grid group are arranged in a staggered mode with the positive electrode fine grids in the positive electrode fine grid group adjacent to the negative electrode fine grid group, namely the positive electrode fine grids in the positive electrode fine grid group correspond to the insulation regions in the negative electrode fine grids, and the insulation regions in the positive electrode fine grid group correspond to the negative electrode fine grids in the negative electrode fine grids.
The polarities of the electrode fine grids of every two adjacent back contact solar cells 7 in the same horizontal direction are opposite;
the conductive composite film 12 comprises a conductive layer, an adhesive layer 2 and a supporting layer 3 from top to bottom in sequence; the conductive layer is composed of a conductive wire 1; the adhesive layer 2 fixes the conductive layer and the support layer 3 on the solar cell module.
As shown in FIG. 5, the wire 1 used in the conductive layer of the conductive composite film 12 is a round copper wire plated with bismuth tin alloy, and the diameter of the copper wire is 350 mm. With 24 rows of wires, for a 156mm by 156mm format back contact solar cell 7, the row pitch of the conductive array used is 6.75 mm.
As shown in fig. 3, a back contact solar cell module is composed of a plurality of solar cells 7, wherein a conductive wire matched with an electrode pattern of the back contact solar cell 7 or a layout of the solar cells 7 is arranged on the conductive composite film 12, and a positive electrode fine grid group on one back contact solar cell 7 is connected with a negative electrode fine grid group on an adjacent solar cell 7 by the same conductive wire 1; the pasting layer on the surface layer of the conductive composite film 12 pastes the conductive wire on the backlight surface of the solar cell;
fig. 3 is a series structure of fig. two, the series connection needs to rotate 180 degrees with the front/back cell, that is, the positive electrode row of the front solar cell 7 is aligned with the negative electrode row of the next solar cell 7.
For the solar cell module, a packaging adhesive film layer 10 made of an ethylene-vinyl acetate copolymer adhesive film layer is tiled on a glass substrate 9, the back contact solar cells 7 are arranged on the packaging adhesive film 10 connected with the glass substrate 9 according to a set pattern, the light receiving surface of each solar cell 7 is in laminated contact with the glass substrate 9 and the packaging adhesive film layer 10, a conductive composite film 12 is then overlaid on the back surface of the back contact solar cell 7, so that the number of rows of conductive wires 1 on the conductive layer on the conductive composite film 12 is equal to the total number of electrode areas and insulating areas of each row of the back contact surface of the back contact solar cell 7, the conductive layer on the conductive composite film 12 is in matched distributed contact with the electrodes of the back contact solar cell 7, namely, the conductive composite film 12 is arranged on each back contact solar cell 7, and the conductive wires arranged in the conductive area 4 on the surface of the positive fine grid are ensured to fall on the insulating area 6 of the negative fine grid row, avoid contacting with the conductive area 5 of the surface of the cathode fine grid; or the conducting wire arranged in the conducting area 5 on the surface of the negative electrode fine grid falls on the insulating area 6 of the positive electrode fine grid row to avoid contacting with the conducting area 4 on the surface of the positive electrode fine grid, and the conducting composite film 12 and the back contact solar cell 7 are adhered and positioned by adopting a positioning adhesive tape. The conductive wires 1 on the extending conductive composite films 12 at the two ends of the battery string should be distributed in a staggered mode, so that the positive bus bar 8 and the negative bus bar 8 can be conveniently welded and converged. And finally, laying a packaging adhesive film 10 and a back plate 11 on the solar cell piece 7 and the conductive composite film 12 in a laminated manner, and integrally fixing by using a positioning adhesive tape.
The lamination of the glass substrate 9, the EVA adhesive film layer, the solar cell piece 7 assembly and the conductive composite film 12 is carried out at the temperature of 120-160 ℃ to form the assembly.
For the back contact solar cell module, compared with the traditional manufacturing process, the conductive composite film 12 allows the main grid electrode of the cell to be removed, the height and the width of the fine grid to be reduced, and the consumption of conductive silver paste can be reduced by about 70% by combining with the optimized silk-screen printing process. The low-temperature process preparation of the copper wires coated with the low-temperature alloy can reduce the external force borne by the battery piece in the packaging process of the component and reduce the risk of fragments, the expected manufacturing cost of the component can be reduced by about 20 percent, in the traditional manufacturing process, the conversion efficiency of the component is usually 21.5-22.5 percent, the conversion efficiency of the component prepared by the conductive composite film can reach more than 22.6 percent, and the power of a 60-piece component can reach more than 375W.
Example 2
The structure of the solar cell module is the same as that of the whole solar cell module in the embodiment, and the difference is that the structure of the backlight surface of the back contact solar cell is different;
as shown in fig. 6, in the structure of the back contact solar cell 7, the back electrodes of the back contact solar cell 7 are in a lattice structure, each row of electrodes has 100 dots, and each dot has a width of about 0.5 mm. The conductive band is provided with 200 rows of leads which are round copper wires with the diameter of 150 microns, the surface of the copper wires is provided with a coating, and the coating is the bismuth tin alloy with the thickness of 10 microns. Before the assembly is packaged, the cells need to be arranged on the conductive composite film, and on each back contact cell, the precise alignment of the corresponding electrodes of the conductive wire 1 and the back contact solar cell 7 needs to be ensured.
The assembly lamination process was consistent with example 1. Compared with the technology of the implementation case 1, the consumption of the conductive silver paste can be reduced by about 75%, the manufacturing cost can be reduced by about 25%, and the conversion efficiency of the component prepared by the conductive composite film can reach more than 22.6%.
Claims (10)
1. The utility model provides an adopt back of body contact solar cell module of electrically conductive complex film series connection, includes a plurality of back of body contact solar cell piece at least, and wherein the sensitive surface of solar cell piece is the upper surface, and the backlight face is the lower surface, its characterized in that: the backlight surface of each solar cell slice is provided with a plurality of rows of positive electrode fine grid groups and a plurality of rows of negative electrode fine grid groups, wherein the rows of positive electrode fine grid groups and the rows of negative electrode fine grid groups are sequentially and alternately arranged; each row of positive electrode fine grid group comprises a plurality of positive electrode fine grids, an insulating region is arranged between every two adjacent positive electrode fine grids, each row of negative electrode fine grid group comprises a plurality of negative electrode fine grids, an insulating region is arranged between every two adjacent negative electrode fine grids, the positive electrode fine grids in each row of positive electrode fine grid group and the negative electrode fine grids in the negative electrode fine grid group adjacent to the positive electrode fine grid group are arranged in a staggered mode, and the polarities of the electrode fine grid groups of every two adjacent solar cells in the same horizontal direction are opposite; the solar cell comprises a back-contact solar cell and is characterized by further comprising a conductive composite film, wherein a plurality of rows of conductive wires are arranged on the conductive composite film and are matched with electrode patterns of the back-contact solar cell or the solar cell typesetting, and a positive electrode fine grid group on one solar cell is connected with a negative electrode fine grid group on an adjacent solar cell through the same conductive wire; the conductive composite film fixes the conductive wire on the backlight surface of the solar cell.
2. The back contact solar cell module of claim 1, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the device also comprises at least one positive bus bar and one negative bus bar, wherein the positive bus bar is connected with the conductive wire on the positive fine grid to form ohmic connection; and the negative bus bar is connected with the negative electrode through the conducting wire on the negative fine grid to form ohmic connection.
3. The back contact solar cell module using the conductive composite film in series connection according to claim 2, wherein: the conductive composite film sequentially comprises a conductive layer, an adhesive layer and a supporting layer from top to bottom; wherein the conductive layer is composed of a plurality of conductive wires; the adhesive layer fixes the conducting layer and the supporting layer on the backlight surface of the solar cell.
4. A back contact solar cell module using a conductive composite film in series connection according to claim 3, wherein: the conductive wires may be circular or semi-circular or triangular or trapezoidal or square.
5. The back contact solar cell module of claim 4, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the number of the conducting wires of the conducting layer in the conducting composite film is 24-36 rows, and the sectional area is 0.2mm2-0.04 mm2(ii) a The outer surface of the lead is provided with a coating, and the thickness of the coating is 5-20 mu m.
6. The back contact solar cell module of claim 5, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the number of the conducting wires of the conducting layer in the conducting composite film is 150-450 rows, and the sectional area is 0.0016mm2-0.0010 mm2(ii) a The thickness of the coating is 5-30 μm.
7. The back contact solar cell module of claim 6, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the coating is one or more of bismuth tin alloy, tin-aluminum-bismuth alloy, tin-bismuth-silver alloy, tin-bismuth-lead alloy, conductive carbon glue or conductive silver glue.
8. The back contact solar cell module of claim 7, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the adhesive layer in the conductive composite film has thermal adhesiveness, the melting point of the adhesive layer is 70-130 ℃, the thickness of the adhesive layer is 10-30 mu m, and the material of the adhesive layer is one or more of EVA, POE, TPO or TPU.
9. The back contact solar cell module of claim 8, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the material of the supporting layer in the conductive composite film is one or more of PO, PVDF, PET, PVF, THV, PA, TPT and TPE.
10. The back contact solar cell module of claim 9, wherein the back contact solar cell module is formed by connecting conductive composite films in series: the thickness of the supported layer is 20-50 μm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745354A (en) * | 2021-08-31 | 2021-12-03 | 泰州中来光电科技有限公司 | Back contact solar cell, assembly and system |
| CN116072753A (en) * | 2023-01-16 | 2023-05-05 | 浙江晶科能源有限公司 | Photovoltaic module and preparation method |
| WO2024016804A1 (en) * | 2022-07-21 | 2024-01-25 | 常州时创能源股份有限公司 | Method for reinforcing electrical connection between battery pieces in photovoltaic module |
| CN117832301A (en) * | 2024-03-05 | 2024-04-05 | 金阳(泉州)新能源科技有限公司 | Back contact battery string, manufacturing method thereof and photovoltaic module |
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2020
- 2020-06-23 CN CN202010579340.XA patent/CN111628028A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745354A (en) * | 2021-08-31 | 2021-12-03 | 泰州中来光电科技有限公司 | Back contact solar cell, assembly and system |
| CN113745354B (en) * | 2021-08-31 | 2023-05-12 | 泰州中来光电科技有限公司 | Back contact solar cell, assembly and system |
| WO2024016804A1 (en) * | 2022-07-21 | 2024-01-25 | 常州时创能源股份有限公司 | Method for reinforcing electrical connection between battery pieces in photovoltaic module |
| CN116072753A (en) * | 2023-01-16 | 2023-05-05 | 浙江晶科能源有限公司 | Photovoltaic module and preparation method |
| CN117832301A (en) * | 2024-03-05 | 2024-04-05 | 金阳(泉州)新能源科技有限公司 | Back contact battery string, manufacturing method thereof and photovoltaic module |
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