CN115295637A - Main-grid-free back-contact solar cell, photovoltaic cell module and preparation method of solar cell module - Google Patents
Main-grid-free back-contact solar cell, photovoltaic cell module and preparation method of solar cell module Download PDFInfo
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- CN115295637A CN115295637A CN202210775026.8A CN202210775026A CN115295637A CN 115295637 A CN115295637 A CN 115295637A CN 202210775026 A CN202210775026 A CN 202210775026A CN 115295637 A CN115295637 A CN 115295637A
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- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 29
- 239000012790 adhesive layer Substances 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 15
- 239000002313 adhesive film Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000003475 lamination Methods 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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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
- H01L31/02—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
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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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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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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Abstract
The invention discloses a main-grid-free back contact solar cell, a photovoltaic cell module and a preparation method of the photovoltaic cell module. The back contact solar cell without the main grid is a whole solar cell, the back of the back contact solar cell without the main grid is divided into at least two cell areas, each cell area is provided with a plurality of fine positive grid lines and a plurality of fine negative grid lines, the fine positive grid lines and the fine negative grid lines are arranged in parallel and alternately, the fine positive grid lines of one cell area of every two adjacent cell areas and the fine negative grid lines of the other cell area are provided with first insulation glue layers, and when the back is provided with conductive interconnection strips for serially connecting every two adjacent cell areas, the first insulation glue layers are used for avoiding the conductive interconnection strips from electrically contacting the fine grid lines covered by the first insulation glue layers. The battery piece does not need scribing, the battery piece cutting effect can be achieved, the series connection of the cutting pieces in the battery piece is achieved, and the hidden cracking risk brought by scribing is reduced.
Description
Technical Field
The invention belongs to the technical field of photovoltaic modules, and particularly relates to a solar cell without a main grid back contact, a photovoltaic cell module and a preparation method thereof.
Background
With the development of photovoltaic module technology, photovoltaic modules are widely used at present. In order to improve the photoelectric conversion efficiency of the photovoltaic module, the conventional main grid technology generally increases the number of main grids to improve the photoelectric conversion efficiency. Compared with the traditional main grid process, the main grid of the solar cell is replaced by the thinner and denser interconnection strip of the main grid-free component, so that the conductivity is improved, the use amount of silver paste of the photovoltaic cell can be reduced, and the cost is greatly reduced.
In the conventional back contact battery piece string process, an entire battery piece needs to be cut into a plurality of battery slices, such as a half slice, a quarter slice and the like, and since the polarities of the electrodes of the battery slices on the same straight line are the same, one of the two adjacent battery slices needs to be turned over and then connected in series by using the interconnection bar.
Due to the fact that the whole battery needs to be sliced, damage and power loss of the battery slices are caused, and a large hidden cracking risk exists at the slicing position.
Disclosure of Invention
(I) technical problems to be solved by the invention
The technical problem solved by the invention is as follows: how to achieve series connection between the "battery slices" without slicing to reduce the risk of subfissure.
(II) the technical scheme adopted by the invention
The utility model provides a no main grid back contact solar wafer, no main grid back contact solar wafer is solar cell whole piece, the back of no main grid back contact solar wafer divides into two at least cell districts, every the cell district all is provided with a plurality of anodal thin grid lines and a plurality of negative pole thin grid lines, anodal thin grid line with the thin grid line of negative pole sets up in parallel and in turn, every two adjacent the thin grid line of positive pole in the cell district of one of cell district and the thin grid line of negative pole in another cell district are provided with first insulation glue film, work as when the back sets up and is used for establishing ties every two adjacent the conductive interconnection in cell district, first insulation glue film is used for avoiding conductive interconnection electrical contact is by the thin grid line that first insulation glue film covered.
Preferably, two cell areas located at the edge on the back surface are both provided with a second insulating adhesive layer, the thin grid lines covered by the first insulating adhesive layer and the thin grid lines covered by the second insulating adhesive layer in each cell area of the two cell areas have different polarities, and when every two adjacent non-main-grid back-contact solar cells are connected in series through the conductive interconnection strip, the second insulating adhesive layer is used for preventing the conductive interconnection strip from electrically contacting the thin grid lines covered by the second insulating adhesive layer.
Preferably, the first and second insulating adhesive layers include a plurality of insulating adhesive blocks distributed in rows and columns.
Preferably, the areas of the cell areas are the same.
The application also discloses a photovoltaic cell assembly, photovoltaic cell assembly includes a plurality of electrically conductive interconnection strips and the multi-disc does not have main bars back contact solar wafer, every pass through between every adjacent two battery piece regions in the no main bars back contact solar wafer electrically conductive interconnection strip is established ties, every adjacent two no main bars back contact solar wafer passes through the electrically conductive interconnection strip is established ties.
Preferably, the photovoltaic cell module further comprises a composite adhesive film, the composite adhesive film completely covers the back surface of each main-grid-free back-contact solar cell and the plurality of conductive interconnection strips, and the conductive interconnection strips are fixed on the back surface of the main-grid-free back-contact solar cell through the composite adhesive film.
Preferably, photovoltaic module is still including resistant solid integrative complex film, resistant solid integrative complex film covers each piece completely the back and a plurality of no main bars back of the body contact solar wafer on the electrically conductive interconnection strip, electrically conductive interconnection strip passes through resistant solid integrative complex film is fixed in the back of no main bars back of the body contact solar wafer, wherein resistant solid integrative complex film be close to the material of the rete of no main bars back of the body contact solar wafer is low mobility material, resistant keeping away from of solid integrative complex film the material of another rete of no main bars back of the body contact solar wafer is EVA material or POE material.
Preferably, the surface of the conductive interconnection strip is coated with a conductive adhesive or a metal coating.
The application also discloses a preparation method of the photovoltaic cell assembly, which comprises the following steps:
sequentially tiling and arranging a plurality of main grid-free back contact solar cells;
laying conductive interconnection strips on the back surface of each non-main-grid back-contact solar cell, so that every two adjacent cell areas in each non-main-grid back-contact solar cell are connected in series;
and laying a conductive interconnection strip between every two adjacent solar cells without main grid back contact so that every two adjacent solar cells without main grid back contact are connected in series.
(III) advantageous effects
The invention discloses a main-grid-free back-contact solar cell, a photovoltaic cell module and a preparation method thereof, and compared with the traditional method, the main-grid-free back-contact solar cell has the following technical effects:
the cell slice adopts a back contact cell without a main grid, the front side is not shielded by grid lines, the efficiency of the cell slice is improved, the using amount of silver paste of the grid lines is reduced on the back side, and the cost is reduced. The battery piece does not need scribing, and the battery piece cutting effect can be realized. The resistance loss is reduced, the damage and power loss of the battery piece caused by scribing are reduced, the hidden crack risk of the scribing position is reduced, the warping of the battery piece after welding is reduced, the hidden crack risk after lamination is reduced, meanwhile, the serial connection of the cutting pieces in the battery piece is realized because the scribing is not carried out, and the electrical performance of the assembly is consistent with that of the traditional cutting piece assembly.
Drawings
Fig. 1 is a front view of a main-grid-free back-contact solar cell according to a first embodiment of the invention;
fig. 2 is a schematic view illustrating a plurality of main-grid-less back-contact solar cells connected in series according to a first embodiment of the present invention;
fig. 3 is a schematic view of a photovoltaic cell assembly according to a second embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a photovoltaic cell assembly according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Before describing in detail the various embodiments of the present application, the technical idea of the present application is first briefly described: in the process of a back contact battery piece string process in the prior art, a whole battery needs to be sliced and then connected in series by using interconnection strips, and the slicing position has higher hidden cracking risk. Therefore, the back surface of the whole main-grid-free back-contact solar cell is divided into a plurality of cell areas, the two adjacent cell areas are connected in series through the conductive interconnection strips, the insulating glue layer is arranged in each cell area to insulate the positive and negative thin grid lines, the series connection effect of cell slicing is realized on the premise of not slicing, the hidden crack risk caused by slicing is reduced,
specifically, as shown in fig. 1, the main-grid-free back-contact solar cell 10 of the first embodiment is a whole solar cell that is not sliced, the back surface of the main-grid-free back-contact solar cell 10 is divided into at least two cell areas a, each cell area a is provided with a plurality of positive fine grid lines 11 (shown by solid lines in fig. 1) and a plurality of negative fine grid lines 12 (shown by dotted lines in fig. 1), and the positive fine grid lines 11 and the negative fine grid lines 12 are parallel and alternately arranged. The thin grid lines 11 of the positive electrode of the cell area of one of every two adjacent cell areas A and the thin grid lines 12 of the negative electrode of the other cell area A are provided with first insulation glue layers 13, and when the conductive interconnection strips 20 used for being connected in series with every two adjacent cell areas A are arranged on the back side, the first insulation glue layers 13 are used for preventing the conductive interconnection strips 20 from being in electric contact with the thin grid lines covered by the first insulation glue layers 13.
The number and the area of the cell areas a can be set according to actual needs, for example, the area of each cell area a is equal to the area of one-N slices of the main-grid-free back-contact solar cell 10, the areas of each cell area a are the same, and N is a natural number greater than 1. The embodiment will be described by taking an example in which the back surface of the main-grid-free back-contact solar cell 10 is divided into two cell areas. It should be noted that the division is only a division on the region, and no actual slicing operation is performed, that is, the two cell regions a still belong to the same main-grid-free back-contact solar cell 10.
As shown in fig. 1, the first insulating adhesive layer 13 of the first embodiment includes a plurality of insulating adhesive blocks (shown as rectangular blocks in fig. 1) distributed in multiple rows and multiple columns, the positive fine grid lines 11 in the left cell area a are covered by the first insulating adhesive layer 13, the negative fine grid lines 12 in the right cell area a are covered by the first insulating adhesive layer 13, when the conductive interconnection bars 20 are laid, the conductive interconnection bars 20 are insulated from the positive fine grid lines 11 in the left cell area a and electrically contacted with the negative fine grid lines 12, and the conductive interconnection bars 20 are electrically contacted with the positive fine grid lines 11 in the right cell area a and electrically insulated from the negative fine grid lines 12, so that the cell areas a on the left and right sides can be connected in series, and short circuit of the positive and negative fine grid lines of the same cell area a can be avoided. Illustratively, the conductive interconnection bars 20 are perpendicular to the positive and negative fine grid lines, and the number of the conductive interconnection bars 20 can be determined according to actual requirements. The positions of the anode fine grid line 11 and the cathode fine grid line 12 can be interchanged, and the same series effect can be realized.
Further, as shown in fig. 1, in order to realize series connection between two adjacent main-grid-free back-contact solar cells 10, a second insulating adhesive layer 14 is disposed on each of two cell areas a located at the edge on the back surface of the main-grid-free back-contact solar cell 10, and the thin grid lines covered by the first insulating adhesive layer 20 in each cell area of the two cell areas a are different in polarity from the thin grid lines covered by the second insulating adhesive layer 14. As shown in fig. 2, when every two adjacent solar cells 10 without main grid back contact are connected in series through the conductive interconnection bar 20, the second insulating adhesive layer is used to prevent the conductive interconnection bar 20 from electrically contacting the thin grid lines covered by the second insulating adhesive layer. The second insulating adhesive layer 14 of the first embodiment includes a plurality of insulating adhesive blocks distributed in rows and columns.
Illustratively, when the positive electrode fine grid lines 11 in the left cell region a are covered by the first insulating glue layer 13, the negative electrode fine grid lines 12 are covered by the second insulating glue layer 14; when the negative electrode fine grid lines 12 in the right cell area a are covered by the first insulating glue layer 13, the positive electrode fine grid lines 11 are covered by the second insulating glue layer 14. When another adjacent solar cell 10 without main grid back contact on the left side is connected in series by the conductive interconnection bar 20, a part of the conductive interconnection bar 20 is electrically connected with the thin positive grid line 11 in the cell area a on the left side, and a part of the conductive interconnection bar 20 is electrically connected with the thin negative grid line 12 in the cell area a of another solar cell 10 without main grid back contact. Similarly, when another solar cell 10 without main grid back contact on the right side is connected in series by the conductive interconnection bar 20, a part of the conductive interconnection bar 20 is electrically connected with the negative electrode fine grid line 12 in the cell region a on the right side, and a part of the conductive interconnection bar 20 is electrically connected with the positive electrode fine grid line 11 in the cell region a of another solar cell 10 without main grid back contact.
In another example, when the back surface of the main-grid-free back-contact solar cell 10 is divided into three cell areas a, the first and second insulating glue layers 13 and 14 are distributed in the cell areas a as follows: when the positive electrode thin grid lines 11 in the left cell area A are covered by the first insulating glue layer 13, the negative electrode thin grid lines 12 are covered by the second insulating glue layer 14; the positive and negative fine grid lines of the middle battery piece region A are covered by the first insulating glue layer 13, the first insulating glue layers 13 on the positive and negative fine grid lines are distributed in a staggered mode, when the negative fine grid line 12 in the right battery piece region A is covered by the first insulating glue layer 13, the positive fine grid line 11 is covered by the second insulating glue layer 14.
As shown in fig. 3, the photovoltaic cell module of the second embodiment includes a plurality of conductive interconnection bars 20 and a plurality of main-grid-free back-contact solar cells 10 as described in the first embodiment, two adjacent cell areas a in each main-grid-free back-contact solar cell 10 are connected in series through the conductive interconnection bars 20, and two adjacent main-grid-free back-contact solar cells 10 are connected in series through the conductive interconnection bars 20.
Further, the photovoltaic cell module further comprises a composite adhesive film 30, the composite adhesive film 30 completely covers the back surface of each main-grid-free back-contact solar cell 10 and the plurality of conductive interconnection strips 20, and the conductive interconnection strips 20 are fixed on the back surface of the main-grid-free back-contact solar cell 10 through the composite adhesive film 30. In the preparation process, the conductive interconnection bar 20 is adhered and fixed on the main grid-free back contact solar cell piece 10 by heating the composite film to 120-150 ℃. Because the heating temperature is lower, the conductive interconnection strips 20 and the main-grid-free back-contact solar cell piece 10 are not welded, the bending degree of the main-grid-free back-contact solar cell piece 10 after film coating is smaller, and the hidden cracking risk after lamination can be reduced. The composite adhesive film 30 has a single-layer or multi-layer structure, and the thickness range is 80-150 μm. The composite adhesive film can be made of EVA or POE.
Further, as shown in fig. 4, the photovoltaic cell module further includes a first encapsulating layer 40 and a second encapsulating layer 50, the first encapsulating layer 40 is located on the front surface of the solar cell 10 without the main grid back contact, the second encapsulating layer 50 is located on the composite adhesive film 30, and the first encapsulating layer 40 and the second encapsulating layer 50 are made of EVA or POE. The photovoltaic cell module further comprises tempered glass 60 and back plate glass 70 which are located on two sides of the main-grid-free back-contact solar cell piece 10, and after all structures of the photovoltaic cell module are laid, namely the back plate glass 70, the second packaging layer 50, the composite adhesive film 30, the conductive interconnection strips 20, the main-grid-free back-contact solar cell piece 10, the first packaging layer 40 and the tempered glass 60 are stacked from top to bottom, the photovoltaic cell module is laminated by adopting a laminating process, and the preparation of the photovoltaic cell module is completed.
In another embodiment, the photovoltaic cell module may not adopt the composite adhesive film 30 to fix the conductive interconnection bar 20, the conductive interconnection bar 20 and the two ends of the main-grid-free back-contact solar cell piece 10 may be ultrasonically welded by ultrasonic welding, the conductive interconnection bar 20 is adhered to the main-grid-free back-contact solar cell piece 10, and then the conductive interconnection bar 20 is fixed by the second packaging layer 50. Second encapsulation layer 50 is for nai solid integrative complex film, and resistant solid integrative complex film covers the back and a plurality of that each piece does not have main bars back contact solar wafer completely on the electrically conductive interconnection strip, electrically conductive interconnection strip passes through resistant solid integrative complex film is fixed in the back that does not have main bars back contact solar wafer 10, wherein resistant being close to of solid integrative complex film the material of the rete of no main bars back contact solar wafer is glass fiber, can provide the support for electrically conductive interconnection strip 20, prevents that electrically conductive interconnection strip 20 from appearing the skew in lamination technology, and the material of keeping away from no main bars back contact solar wafer 10 of resistant solid integrative complex film is EVA material or POE material.
Further, the preparation method of the photovoltaic cell module of the third embodiment includes the following steps:
step S10: a plurality of main grid-free back contact solar cells 10 as described in the first embodiment are sequentially laid and arranged;
step S20: laying conductive interconnection strips 20 on the back surface of each non-main-grid back-contact solar cell 10, so that every two adjacent cell areas A in each non-main-grid back-contact solar cell 10 are connected in series;
step S30: the conductive interconnection strip 20 is laid between every two adjacent solar cells 10 without main grid back contact, so that every two adjacent solar cells 10 without main grid back contact are connected in series. The laying process of the conductive interconnection strips 20 and the arrangement process of other components can be referred to the related description of the second embodiment, and are not described herein again.
The solar cell and the photovoltaic cell module without the main grid back contact disclosed by the embodiment have the following advantages: the cell slice adopts a back contact cell without a main grid, the front side is not shielded by grid lines, the efficiency of the cell slice is improved, the consumption of grid line silver paste is reduced on the back side, and the cost is reduced. The battery piece does not need scribing, and half-piece effect of the battery piece can be realized. The resistance loss is reduced, the damage and power loss of the battery piece caused by scribing are reduced, the hidden crack risk of the scribing position is reduced, the warping of the battery piece after welding is reduced, the hidden crack risk after lamination is reduced, meanwhile, half pieces are connected in series in the battery piece without scribing, and the electrical performance of the assembly is consistent with that of the traditional half piece assembly.
Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents, and that such changes and modifications are intended to be within the scope of the invention.
Claims (9)
1. The utility model provides a no main bars back contact solar wafer which characterized in that, no main bars back contact solar wafer is the whole piece of solar cell, the back of no main bars back contact solar wafer divides into two piece at least cell district, every the cell district all is provided with a plurality of anodal thin grid line and a plurality of negative pole thin grid line, anodal thin grid line with the thin grid line of negative pole sets up in parallel and in turn, every two adjacent the anodal thin grid line of cell district of one of cell district and the thin grid line of negative pole of another cell district are provided with first insulation glue film, work as the back sets up and is used for establishing ties every two adjacent when the electrically conductive interconnection strip in cell district, first insulation glue film is used for avoiding electrically conductive interconnection strip electrical contact is by the thin grid line that first insulation glue film covered.
2. The solar cell of claim 1, wherein a second insulating adhesive layer is disposed on each of two cell regions on the back surface, the two cell regions being located at the edge, the thin gate lines covered by the first insulating adhesive layer and the thin gate lines covered by the second insulating adhesive layer in each of the two cell regions have different polarities, and when every two adjacent solar cells without main gate back contact are connected in series through the conductive interconnection bar, the second insulating adhesive layer is used to prevent the conductive interconnection bar from electrically contacting the thin gate lines covered by the second insulating adhesive layer.
3. The solar cell of claim 2, wherein the first and second layers of insulating glue comprise a plurality of blocks of insulating glue arranged in a plurality of rows and columns.
4. The solar cell of claim 1, wherein the areas of the cell regions are the same.
5. A photovoltaic cell module, comprising a plurality of conductive interconnection bars and a plurality of main-grid-free back-contact solar cells as claimed in any one of claims 1 to 4, wherein each of the main-grid-free back-contact solar cells is connected in series between every two adjacent cell areas through the conductive interconnection bars, and every two adjacent main-grid-free back-contact solar cells are connected in series through the conductive interconnection bars.
6. The assembly according to claim 5, further comprising a composite adhesive film, wherein the composite adhesive film completely covers the back surface of each main-grid-free back-contact solar cell and the conductive interconnection bars, and the conductive interconnection bars are fixed on the back surface of the main-grid-free back-contact solar cell through the composite adhesive film.
7. The photovoltaic cell module as claimed in claim 5, wherein the photovoltaic cell module further comprises a solid-resistant composite film, the solid-resistant composite film completely covers each piece of the back surface of the main-grid-free back-contact solar cell and the plurality of conductive interconnection bars, the conductive interconnection bars are fixed on the back surface of the main-grid-free back-contact solar cell through the solid-resistant composite film, the solid-resistant composite film is close to the layer of the main-grid-free back-contact solar cell and is made of glass fiber, and the solid-resistant composite film is far away from the layer of the main-grid-free back-contact solar cell and is made of EVA material or POE material.
8. The solar cell piece without the main grid and back contact as claimed in claim 5, wherein the surface of the conductive interconnection bar is coated with a conductive adhesive or a metal coating.
9. A method of making a photovoltaic cell assembly, the method comprising:
sequentially arranging a plurality of main grid-free back contact solar cell pieces as claimed in any one of claims 1 to 4 in a tiled manner;
laying conductive interconnection strips on the back surface of each non-main-grid back-contact solar cell, so that every two adjacent cell areas in each non-main-grid back-contact solar cell are connected in series;
and laying a conductive interconnection strip between every two adjacent solar cells without main grid back contact so that every two adjacent solar cells without main grid back contact are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210775026.8A CN115295637A (en) | 2022-07-01 | 2022-07-01 | Main-grid-free back-contact solar cell, photovoltaic cell module and preparation method of solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210775026.8A CN115295637A (en) | 2022-07-01 | 2022-07-01 | Main-grid-free back-contact solar cell, photovoltaic cell module and preparation method of solar cell module |
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| Publication Number | Publication Date |
|---|---|
| CN115295637A true CN115295637A (en) | 2022-11-04 |
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| CN202210775026.8A Pending CN115295637A (en) | 2022-07-01 | 2022-07-01 | Main-grid-free back-contact solar cell, photovoltaic cell module and preparation method of solar cell module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117153951A (en) * | 2023-10-20 | 2023-12-01 | 正泰新能科技有限公司 | Production method of back contact photovoltaic module and back contact photovoltaic module |
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2022
- 2022-07-01 CN CN202210775026.8A patent/CN115295637A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117153951A (en) * | 2023-10-20 | 2023-12-01 | 正泰新能科技有限公司 | Production method of back contact photovoltaic module and back contact photovoltaic module |
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