CN109216475A - A kind of solar cell panel assembly - Google Patents
A kind of solar cell panel assembly Download PDFInfo
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- CN109216475A CN109216475A CN201710523281.2A CN201710523281A CN109216475A CN 109216475 A CN109216475 A CN 109216475A CN 201710523281 A CN201710523281 A CN 201710523281A CN 109216475 A CN109216475 A CN 109216475A
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 97
- 239000010703 silicon Substances 0.000 claims abstract description 97
- 239000000758 substrate Substances 0.000 claims abstract description 89
- 229910052751 metal Inorganic materials 0.000 claims abstract description 80
- 239000002184 metal Substances 0.000 claims abstract description 80
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims description 102
- 230000005611 electricity Effects 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 239000002861 polymer material Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000003667 anti-reflective effect Effects 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000000429 assembly Methods 0.000 abstract description 4
- 230000000712 assembly Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 110
- 238000010586 diagram Methods 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910000679 solder Inorganic materials 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000013047 polymeric layer Substances 0.000 description 3
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- 238000012545 processing Methods 0.000 description 3
- ROLAGNYPWIVYTG-UHFFFAOYSA-N 1,2-bis(4-methoxyphenyl)ethanamine;hydrochloride Chemical compound Cl.C1=CC(OC)=CC=C1CC(N)C1=CC=C(OC)C=C1 ROLAGNYPWIVYTG-UHFFFAOYSA-N 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical group FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 241000127225 Enceliopsis nudicaulis Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000006071 cream Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
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- 210000004276 hyalin Anatomy 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- -1 polytetrafluoroethylene ethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01L31/02245—Electrode arrangements specially adapted for back-contact solar cells for metallisation wrap-through [MWT] type 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
- H01L31/02—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
- H01L31/022458—Electrode arrangements specially adapted for back-contact solar cells for emitter wrap-through [EWT] type solar cells, e.g. interdigitated emitter-base back-contacts
-
- 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
- H01L31/048—Encapsulation of modules
-
- 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
- H01L31/048—Encapsulation of modules
- H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
-
- 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
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Photovoltaic Devices (AREA)
Abstract
Poor, welding material waste that there are connection reliability to overcome the problems, such as existing back contact solar battery and welding procedure are cumbersome, the present invention provides a kind of solar cell panel assemblies, including backsheet layer and multiple solar battery sheets, the solar battery sheet includes silicon substrate, first electrode and second electrode, the silicon substrate has phototropic face, shady face and the side being surrounded between the phototropic face and shady face, the first electrode is located at the shady face of the silicon substrate, and the second electrode includes the side electrode and front electrode being electrically connected to each other；Metallic conduction part is provided on the backsheet layer, the metallic conduction part includes metal bottom surface and protrusion metal, and the protrusion metal is convexed to form upwardly by the metal bottom；Two adjacent solar battery sheets are electrically connected by the metallic conduction part.Solar cell panel assembly structure provided by the invention is simple, high reliablity, reduces welding difficulty and operation difficulty that component is arranged.
Description
Technical field
The invention belongs to technical field of solar batteries, and in particular to a kind of solar cell panel assembly.
Background technique
Respectively there are positive and negative anodes of 2 to 3 silver-colored main gate lines as battery, these masters in the front and back sides of conventional crystalline silicon solar cell
Grid line not only consumes a large amount of silver paste, simultaneously as blocking incident light causes the decline of battery efficiency.In addition, battery is positive and negative
Pole is respectively distributed to the upper and lower surface of battery, when battery is connected, needs the positive electrode of cell piece and adjacent cell with welding
Piece rear electrode mutually welds connection, and welding procedure is cumbersome, and welding material is be easy to cause using more when welding and in subsequent laminating technology
Cell piece is damaged.
It is lost for solar battery front side shading, in the prior art, there is researcher to develop EWT (emitter circulating
Back contact battery), MWT (metal-wraparound back contact battery), the back contact batteries such as IBC (full back contact battery).These back contacts
Battery front side absolutely not grid line (EWT battery, IBC battery) does not have main gate line (MWT battery), reduces positive shading surface
Product, improves solar battery power.
EWT (emitter circulating back contact battery), MWT (metal-wraparound back contact battery), IBC (full back contact battery) etc.
The manufacture craft of back contact battery is considerably complicated, as MWT battery and EWT battery needs carry out laser boring, and general on silicon wafer
Electrode or emitter region pass through hole and manufacture cell backside, and manufacture difficulty is big, at high cost, and production component is also required to expend a large amount of
Solder.And IBC battery is high to manufacture craft requirement, only U.S. Sunpower company realizes small-scale volume production at present.
Cell piece damage and solder waste are caused for welding manner, in the prior art, has researcher to use change
The optimization methods such as electrode position and special paving mode.By the cell piece of silk-screen printing front and back sides electrode along with thin grid line
Vertical direction is cut into the chip (3-4 parts) of equal part, and the cell piece front electrode after cutting is located at rear electrode
Then cell piece both ends but different sides arrange mode tin cream for the rear electrode of cell piece and adjacent cell piece according to tile type
Front electrode be overlapped series connection.However the tile type mode of arranging makes the method for component and its is easy in welding process and subsequent
The broken damage of cell piece is caused in laminating technology, the cell piece at stratification position can not participate in generating electricity, cause to waste, influence group
Part power.
It is subsequent and develop a kind of novel small pieces back contact solar battery for the above technical deficiency, pass through laser
It is cut into conventional silicon wafers (generally 156mm*156mm) in parts 2-8 parts, is fabricated to small pieces back contact battery piece, battery front side
It is light-blocking without main gate line, improve component power；Positive and negative electrode is connected in cell backside, is reduced welding spoilage, is reduced about
2/3 solder usage amount greatly reduces welding thermal losses, effectively increases component power；Positive and negative electrode is in cell backside
Connection, cell piece gap become smaller, and busbar is directly drawn from cell piece, is reduced the total area of component, is increased component
Effective area, and then increase the power of component.
For the above small pieces back contact solar battery since positive and negative anodes are located at two edges of cell piece, welding procedure is special
Very, it needs two strip electrodes of two cell pieces while parallel transverse is welded, welding procedure difficulty is very big, it is easy to weld
Dislocation causes electric leakage and entire battery matrix deformation.Simultaneously because cell piece spacing is small, welding and cell piece flexibility are poor, electricity
The stress buffer effect of pond matrix is small, it is easy to crack occur in processes such as welding, typesetting, laminations and be even broken.
Although the above all kinds of back contact solar batteries provide different cell pieces and are connected with each other mode, existing back
It is cumbersome that contact solar battery not can solve poor connection reliability between cell piece, welding material waste and welding procedure yet
Problem.
Summary of the invention
For existing back contact solar battery, that there are connection reliability is poor, welding material waste and welding procedure are cumbersome
The problem of, the present invention provides a kind of solar cell panel assemblies.
Used technical solution is as follows to solve above-mentioned technical problem by the present invention:
A kind of solar cell panel assembly is provided, including backsheet layer and the multiple solar energy being arranged on the backsheet layer
Cell piece, the solar battery sheet include silicon substrate, first electrode and second electrode, and the silicon substrate has phototropic face, back
Smooth surface and the side being surrounded between the phototropic face and shady face, the first electrode are located at the shady face of the silicon substrate,
The second electrode includes the side electrode and front electrode being electrically connected to each other, and the side electrode is located at the side of the silicon substrate
Face, the front electrode are located at the phototropic face of the silicon substrate；
Metallic conduction part is provided on the backsheet layer, the metallic conduction part includes metal bottom surface and protrusion metal, institute
It states protrusion metal and is convexed to form upwardly by the metal bottom；
Two adjacent solar battery sheets by the metallic conduction part be electrically connected, the metal bottom surface and one of them
The first electrode of solar battery sheet is electrically connected, and the side electrode of the protrusion metal and another solar battery sheet is electrically connected
It connects.
Optionally, the second electrode further includes bottom-side electrodes, and the bottom-side electrodes are located at the shady face of the silicon substrate,
The bottom-side electrodes are electrically connected with the side electrode.
Optionally, the bottom-side electrodes of another solar battery sheet are electrically connected with the metal bottom surface.
Optionally, the metallic conduction part is inverted T-type structure, and the protrusion metal is located in the top of the metal bottom surface
Between position and raise upward, in two neighboring solar battery sheet, the first electrode of one of solar battery sheet and another
The bottom-side electrodes of a solar battery sheet are located at the two sides of the protrusion metal and are in electrical contact with the metal bottom surface, and another
The side electrode of one solar battery sheet and the protrusion metal electrical contact.
Optionally, the metallic conduction part is L-type structure, and the protrusion metal is located at the marginal position of the metal bottom surface
And raise upward, in two neighboring solar battery sheet, the first electrode of one of solar battery sheet and another sun
The bottom-side electrodes of energy cell piece are respectively positioned on the ipsilateral of the protrusion metal and are in electrical contact with the metal bottom surface, and another sun
The side electrode and the protrusion metal electrical contact of energy cell piece.
Optionally, the silicon substrate is rectangular configuration, and the first electrode and the bottom-side electrodes are located at the back
Two sides in smooth surface in the width direction, and the first electrode extends to form strip structure along the end edge of the shady face,
The bottom-side electrodes extend to form strip structure along the end edge of the shady face.
Optionally, diffusion layer is formed on the silicon substrate, the diffusion layer includes the first diffusion part and the second diffusion part；
First diffusion part is formed in the phototropic face of the silicon substrate, the front electrode and first diffusion part electricity
Connection；
Second diffusion part is formed in the side of the silicon substrate, and the side electrode is electrically connected with second diffusion part
It connects.
Optionally, be formed with diffusion layer on the silicon substrate, the diffusion layer include the first diffusion part, the second diffusion part and
Third diffusion part, the both ends of second diffusion part are separately connected first diffusion part and the third diffusion part；
First diffusion part is formed in the phototropic face of the silicon substrate, the front electrode and first diffusion part electricity
Connection；
Second diffusion part is formed in the side of the silicon substrate, and the side electrode is electrically connected with second diffusion part
It connects；
The third diffusion part is formed in the shady face of the silicon substrate, the bottom-side electrodes and third diffusion part electricity
Connection.
Optionally, the front electrode includes multiple gate electrode lines being parallel to each other, and the gate electrode line is by described first
One end of diffusion part extends to the other end and is electrically connected with the side electrode.
Optionally, the side electrode covers the surface that second diffusion part deviates from the silicon substrate.
Optionally, the bottom-side electrodes cover the surface that the third diffusion part deviates from the silicon substrate.
Optionally, Al-BSF is formed on the shady face of the silicon substrate, the first electrode is located in the Al-BSF,
The Al-BSF and the diffusion layer are mutually isolated.
Optionally, the solar battery sheet further includes antireflection layer, and the antireflection layer is covered in the silicon substrate
Phototropic face, at least partially embedded antireflection layer of front electrode, and the front electrode and the silicon substrate to light
Face forms Ohmic contact.
Optionally, the backsheet layer further includes bottom plate and insulating layer, and the metallic conduction part and the insulating layer are respectively positioned on
At the top of the bottom plate, the insulating layer is covered in the region that metallic conduction part periphery is exposed on the bottom plate.
Optionally, the insulating layer is white Reflection layer.
Optionally, the insulating layer is the polymer material layer containing white filler, and the white filler includes white carbon black
And/or titanium dioxide.
Optionally, the solar cell panel assembly further includes the first glue-line, the second glue-line and cover layer, the backboard
Layer, the first glue-line, solar battery sheet, the second glue-line and cover layer stack gradually.
Optionally, the cover layer includes the one of photovoltaic glass layer, plated film anti reflection glass layer and flannelette anti-reflective glass layer
Layer or multiple layer combination.
The solar cell panel assembly provided according to the present invention, by the side electrode of first electrode and second electrode respectively from
The shady face of silicon substrate and side are drawn, while metallic conduction part is provided on backsheet layer, are had on the metallic conduction part
The metal bottom surface being electrically connected with the first electrode and the protrusion metal being electrically connected with the side electrode, protruding metal is simultaneously
Play the role of positioning solar battery sheet, enables solar cell piece proper alignment on backsheet layer, matrix is avoided to become
Shape, the first electrode and side electrode can form sufficient electrical contact with metallic conduction part, to reduce solar panel
The contact internal resistance of component and the use for reducing solder, improve stability test.
Detailed description of the invention
Fig. 1 is the backboard schematic diagram of a layer structure for the solar cell panel assembly that one embodiment of the invention provides；
Fig. 2 is the cross section structure schematic diagram for the solar battery sheet that one embodiment of the invention provides；
Fig. 3 is the phototropic face structural schematic diagram for the solar battery sheet that one embodiment of the invention provides；
Fig. 4 is the shady face structural schematic diagram for the solar battery sheet that one embodiment of the invention provides；
Fig. 5 is illustrating containing the backsheet layer cross section structure of L-type and inverted T shaped metallic conduction part for one embodiment of the invention offer
Figure；
Fig. 6 is the backsheet layer cross section structure schematic diagram containing inverted T shaped metallic conduction part that one embodiment of the invention provides；
Fig. 7 is that its metallic conduction part of solar cell panel assembly that one embodiment of the invention provides and solar battery sheet connect
The elevational schematic view connect；
Fig. 8 is the backsheet layer cross section structure schematic diagram containing L-type metallic conduction part that one embodiment of the invention provides；
Fig. 9 is the elevational schematic view that the metallic conduction part that one embodiment of the invention provides is connect with solar battery sheet；
Figure 10 is the overlooking structure diagram of its backsheet layer of the solar cell panel assembly of one embodiment of the invention offer；
Figure 11 is the solar battery sheet connection schematic diagram for the solar cell panel assembly that one embodiment of the invention provides；
Figure 12 is the connection circuit diagram for the solar cell panel assembly that one embodiment of the invention provides；
Figure 13 is the layer structure schematic diagram for the solar cell panel assembly that one embodiment of the invention provides.
Appended drawing reference in Figure of description is as follows:
1, solar battery sheet；11, silicon substrate；111, diffusion layer；1111, the first diffusion part；1112, the second diffusion part；
1113, third diffusion part；12, first electrode；13, second electrode；131, front electrode；1311, gate electrode line；132, side electricity
Pole；133, bottom-side electrodes；14, Al-BSF；15, antireflection layer；2, backsheet layer；21, bottom plate；22, insulating layer；23, it first draws
Route；24, the second lead line；25, metallic conduction part；251, metal is protruded；252, metal bottom surface；26, middle line；3,
Two glue-lines；4, the first glue-line；5, cover layer.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Referring to shown in FIG. 1 to FIG. 5, present embodiment discloses a kind of solar cell panel assemblies, including backsheet layer 2 and setting
Multiple solar battery sheets 1 on the backsheet layer 2, the solar battery sheet 1 include silicon substrate 11,12 and of first electrode
Second electrode 13, the silicon substrate 11 have phototropic face, shady face and the side being surrounded between the phototropic face and shady face,
The first electrode 12 is located at the shady face of the silicon substrate 11, and the second electrode 13 includes the side electrode being electrically connected to each other
132 and front electrode 131, the side electrode 132 be located at the side of the silicon substrate 11, the front electrode 131 is located at institute
State the phototropic face of silicon substrate 11.
As shown in figure 5, being provided with metallic conduction part 25 on the backsheet layer 2, the metallic conduction part 25 includes metal bottom
Face 252 and protrusion metal 251, the protrusion metal 251 is raised upward by the metal bottom surface 252 to be formed, it should be noted that
In various embodiments, the protrusion metal 251 and the metal bottom surface 252 can be integral structure, or directly contact
The separate structure of electrical connection, or the separate structure being electrically connected by intermediary.
Two adjacent solar battery sheets 1 by the metallic conduction part 25 be electrically connected, the metal bottom surface 252 and its
In the first electrode 12 of a solar battery sheet 1 be electrically connected, the protrusion metal 251 and another solar battery sheet 1
Side electrode 132 be electrically connected.
The side electrode 132 of first electrode 12 and second electrode 13 is drawn from the shady face of silicon substrate 11 and side respectively
Out, while on backsheet layer 2 it is provided with metallic conduction part 25, is had on the metallic conduction part 25 and 12 electricity of first electrode
The metal bottom surface 252 of connection and the protrusion metal 251 being electrically connected with the side electrode 132, protruding metal play pair simultaneously
The effect that solar battery sheet 1 positions, enables solar cell piece proper alignment on backsheet layer 2, avoids matrix from deforming, institute
Sufficient electrical contact can be formed with metallic conduction part 25 by stating first electrode 12 and side electrode 132, to reduce solar battery
The contact internal resistance of board group part and the use for reducing solder, improve stability test.
It should be understood that the silicon substrate 11 can be formed under light illumination in phototropic face and shady face it is of different nature positive and negative
Charge, the first electrode 12 and second electrode 13 are used to draw the positive and negative charge of the silicon substrate 11, to form solar energy
The basic function of supplying power structure of cell piece 1.
As shown in figure 3, the front electrode 131 be located at the phototropic face of the silicon substrate 11 and with the side electrode 132
Electrical connection, i.e., one end of the described front electrode 131 need to extend to the phototropic face of the silicon substrate 11 close to the side electrode 132
Edge, first kind charge-conduction for generating 11 phototropic face of silicon substrate to side electrode 132, and the side electrode
132 are electrically connected with the protruding metal of the metallic conduction part 25, in some embodiments of the invention, the solar battery sheet
1 two sides are provided with the metallic conduction part 25 and are electrically connected, at this time the other end of the front electrode 131 and the silicon
Certain interval or insulation are arranged far from the edge of the side electrode 132 for the phototropic face of substrate 11, to avoid the front electricity
The metallic conduction part 25 of 1 two sides of solar battery sheet is directly connected in pole 131, leads to the short circuit of solar battery sheet 1.
In the present embodiment, the second electrode 13 further includes bottom-side electrodes 133, and the bottom-side electrodes 133 are located at described
The shady face of silicon substrate 11, the bottom-side electrodes 133 are electrically connected with the side electrode 132.
In two adjacent solar battery sheets 1, the of the metal bottom surface 252 and one of solar battery sheet 1
The electrical connection of one electrode 12, the protrusion metal 251 is electrically connected with the side electrode 132 of another solar battery sheet 1, and institute
The bottom-side electrodes 133 for stating another solar battery sheet 1 are electrically connected with the metal bottom surface 252.
The bottom-side electrodes 133 of the first electrode 12 and the second electrode 13 are arranged at the shady face of silicon substrate 11,
The back-contact installation that can be realized solar battery sheet 1, the phototropic face avoided in silicon substrate 11 form main electrode grid line
1311, front shading-area is reduced, and then improve the power and incident photon-to-electron conversion efficiency of solar battery sheet 1, the setting is simultaneously
The solder for decreasing the electrical connection between different solar battery sheets 1 uses, and can pass through the metallic conduction part positioned at backsheet layer 2
25 are electrically connected to each other, and reduce manufacturing cost.
On the other hand, second electrode 13 is set to the form of front electrode, side electrode 132 and bottom-side electrodes 133, it will
Shady face is drawn from the side of silicon substrate 11 and extended to second electrode 13, and the structure processing of the second electrode 13 is relatively simple,
It does not need additionally to carry out the operation such as laser boring, reduces difficulty of processing, while side electrode 132 can increase and external metal
The accessible area of conduct piece 25 reduces contact resistance, being capable of better derived current.
The metallic conduction of first aspect present invention embodiment offer is described below in conjunction with Fig. 6, Fig. 7, Figure 10, Figure 11 and Figure 12
Part 25 and its connection setting.
The metallic conduction part 25 is inverted T-type structure, and the protrusion metal 251 is located at the top of the metal bottom surface 252
Middle position simultaneously raises upward, in two neighboring solar battery sheet 1, the first electrode 12 of one of solar battery sheet 1
With the bottom-side electrodes 133 of another solar battery sheet 1 be located at it is described protrusion metal 251 two sides and with the metal bottom
Face 252 is in electrical contact, and the side electrode 132 of another solar battery sheet 1 and the protrusion metal 251 are in electrical contact, and form string
Connection connection.
The silicon substrate 11 is rectangular configuration, and the first electrode 12 and the bottom-side electrodes 133 are located at the back
Two sides in smooth surface in the width direction, and the first electrode 12 extends to form strip knot along the end edge of the shady face
Structure, the bottom-side electrodes 133 extend to form strip structure along the end edge of the shady face.
It should be noted that in other embodiments, other shape and structures, such as cylinder can also be used in the silicon substrate 11
Body, irregular structure etc..
The silicon substrate 11 for the rectangular configuration that the present embodiment uses is conducive to the solar battery sheet 1 on backsheet layer 2
Proper alignment improves the closeness of solar battery sheet 1, another party to reduce the spare space between solar battery sheet 1
Face, it is flat by forming the first electrode 12 and the bottom-side electrodes 133 in the shady face marginal position of the silicon substrate 11
Two strip structures of row, shorten in two neighboring solar battery sheet 1, the first electrode 12 of one of solar battery sheet 1
Welding distance between the second electrode 13 of another solar battery sheet 1, reduces the use of solder.
It is the connection structure signal on the present embodiment dorsulum layer 2 between solar battery sheet 1 as shown in Figure 10~Figure 12
Figure further includes being provided with the first lead line 23, the second lead line 24 and middle line 26 on the backsheet layer 2, and described the
One lead line 23 and second lead line 24 are symmetrically disposed on two of the central axis of same end on the backsheet layer 2
Side, the middle line 26 is set to the other end on the backsheet layer 2, and the middle line 26 draws with described first respectively
Route 23 is parallel with second lead line 24 out.
Multiple metallic conduction parts 25, and institute are provided between the middle line 26 and first lead line 23
The multiple metallic conduction parts 25 stated between middle line 26 and first lead line 23 are arranged in the matrix of multiple lines and multiple rows
Cloth is provided with solar battery sheet 1 between two adjacent metallic conduction parts 25 in single row, the solar battery sheet 1
First electrode 12 is welded on the bottom-side metal of one of metallic conduction part 25, the bottom-side electrodes of the solar battery sheet 1
133 and side electrode 132 be welded on the bottom-side metal and protruding metal of another metallic conduction part 25, and be located at single row two
The solar battery sheet 1 at end is respectively electrically connected on the first lead line 23 and middle line 26.
Multiple metallic conduction parts 25, and institute are provided between the middle line 26 and second lead line 24
The multiple metallic conduction parts 25 stated between middle line 26 and second lead line 24 are arranged in the matrix of multiple lines and multiple rows
Cloth is provided with solar battery sheet 1 between two adjacent metallic conduction parts 25 in single row, the solar battery sheet 1
First electrode 12 is welded on the bottom-side metal of one of metallic conduction part 25, the bottom-side electrodes of the solar battery sheet 1
133 and side electrode 132 be welded on the bottom-side metal and protruding metal of another metallic conduction part 25, and be located at single row two
The solar battery sheet 1 at end is respectively electrically connected on the second lead line 24 and middle line 26.
Wherein, the first lead line 23 can be anode or cathode, and the second lead line 24 is and the first lead line
23 opposite electrodes；When the first lead line 23 is anode, the second lead line 24 is cathode, and vice versa.
In the present embodiment, battery strings, multiple battery strings formation parallel with one another are formed by the series connection of multiple solar battery sheets 1
Battery pack forms series connection by the middle line 26 between two battery packs, obtains the company of series-parallel solar battery sheet 1
Connect mode, first lead line 23 and second lead line 24 are drawn by the left and right sides of backsheet layer 2 respectively, into
When the multiple solar cell panel assembly of row installs connection, multiple solar cell panel assemblies can be arranged side by side, due to described
First lead line 23 and second lead line 24 are drawn respectively in the two sides of solar cell panel assembly, can be effectively reduced
The electrical connection length of two neighboring solar cell panel assembly reduces in cost and battery so as to reduce connection cables length
Resistance.
Intelligible, in other embodiments, those skilled in the art can also be by adjusting the first lead line 23, second
The position of lead line 24, middle line 26 and metallic conduction part 25 with to solar battery sheet 1 formed different series connection and/or
Type of attachment in parallel, the conventional replacement realized under the teachings of the present invention should all include within protection scope of the present invention.
The metallic conduction part 25 of second aspect of the present invention embodiment offer is described below in conjunction with Fig. 8 and Fig. 9 and its connection is set
It sets.
The metallic conduction part 25 is L-type structure, and the protrusion metal 251 is located at the margin location of the metal bottom surface 252
It sets and raises upward, in two neighboring solar battery sheet 1, the first electrode 12 of one of solar battery sheet 1 and another
The bottom-side electrodes 133 of a solar battery sheet 1 be respectively positioned on protrusion metal 251 ipsilateral and with 252 electricity of metal bottom surface
Contact, and the side electrode 132 of another solar battery sheet 1 and the protrusion metal 251 are in electrical contact.
The silicon substrate 11 is rectangular configuration, and the first electrode 12 and the bottom-side electrodes 133 are located at the back
Two sides in smooth surface in the width direction, and the first electrode 12 extends to form strip knot along the end edge of the shady face
Structure, the bottom-side electrodes 133 extend to form strip structure along the end edge of the shady face.
It can be realized longitudinal connection, and multiple sun side by side between multiple solar battery sheets 1 by the setting
It can be serially connected between battery, the protrusion metal 251 can play positioning action to solar battery sheet 1, and matrix is avoided to become
Shape；The protrusion metal 251 can be formed with the side electrode 132 of the solar battery sheet 1 and is in electrical contact simultaneously, be connect with increasing
Contacting surface product, reduces contact resistance.
It should be noted that can also be achieved the parallel connection of two neighboring solar battery sheet 1 by the metallic conduction part 25
Connection, such as: two parallel metallic conduction parts 25 of setting, in two neighboring solar battery sheet 1, one of solar-electricity
The first electrode 12 of pond piece 1 and the first electrode 12 of another solar battery sheet 1 are electrically connected with a metallic conduction part 25,
The bottom-side electrodes 133 of one of solar battery sheet 1 and the bottom-side electrodes 133 of another solar battery sheet 1 with it is another
A metallic conduction part 25 is electrically connected.
It should be noted that metallic conduction part and second aspect embodiment that first aspect present invention embodiment provides provide
Metallic conduction part can be performed separately, implementation can also be combined, should all include in guarantor of the invention to obtain different embodiments
Within the scope of shield.
1 structure of solar battery sheet of some embodiments of the invention offer is described below in conjunction with Fig. 2, Fig. 3 and Fig. 4.
In the present embodiment, diffusion layer 111 is formed on the silicon substrate 11, the diffusion layer 111 includes the first diffusion
Portion 1111 and the second diffusion part 1112；
First diffusion part 1111 is formed in the phototropic face of the silicon substrate 11, specifically, first diffusion part
1111 cover the phototropic face of the silicon substrates 11, the electrical connection of the first diffusion part 1111 described in the front electrode 131, thus by electric
Son draws first diffusion part 1111.
Second diffusion part 1112 is formed in the side of the silicon substrate 11, specifically, second diffusion part 1112
It is formed in a side of the silicon substrate 11, the side electrode 132 is electrically connected with second diffusion part 1112, passes through institute
Ohmic contact can be formed with the side electrode 132 by stating the second diffusion part 1112, increase diffusion layer 111 and second electrode 13 it
Between contact area, reduce the internal resistance of cell.
In the present embodiment, the silicon substrate 11 is using P-type silicon as silicon substrate, in P-type silicon by way of thermal diffusion
The part of the surface of matrix penetrates into P elements, to obtain diffusion layer 111.
At this point, the first electrode 12 is anode, contacted with silicon substrate, exports positive charge；The second electrode 13 is negative
Pole is contacted with diffusion layer 111, exports negative electrical charge.
It should be understood that in other embodiments, the silicon substrate 11 is also possible to using N-type silicon as silicon substrate, in N-type
Diffusion layer 111 is formed on silicon substrate 11, at this point, the first electrode 12 is cathode, is contacted with silicon substrate, and negative electrical charge is exported；Institute
Second electrode 13 is stated as anode, is contacted with diffusion layer 111, exports positive charge.
In a preferred embodiment, the diffusion layer 111 further includes third diffusion layer 111, second diffusion part
1112 both ends are separately connected first diffusion part 1111 and the third diffusion part 1113, first diffusion part 1111,
Second diffusion part 1112 and third diffusion part 1113 are 111 knot of diffusion layer for the one that the silicon substrate 11 is obtained through thermal diffusion
Structure.
The third diffusion part 1113 is formed in the shady face of the silicon substrate 11, specifically, the third diffusion part
1113 are formed in the position on the shady face of the silicon substrate 11 with second diffusion part 1112 handover, and the third is spread
Portion 1113 only covers the part of the surface of the shady face, and the bottom-side electrodes 133 are electrically connected with the third diffusion part 1113, uses
Contact area between increase diffusion layer 111 and second electrode 13, while second electrode 13 is led into the silicon substrate 11
Shady face.
In the present embodiment, the front electrode 131 includes multiple gate electrode lines 1311 being parallel to each other, the electrode grid
Line 1311 is extended to the other end by one end of first diffusion part 1111 and is electrically connected with the side electrode 132.
It is parallel to each other, multiple gate electrode lines 1311 is arranged in parallel in described between multiple gate electrode lines 1311
First diffusion part, 1111 surface, be conducive to avoid carrying out light concentrating block under the premise of, improve the electrode grid as far as possible
The contact area of line 1311 and first diffusion part 1111 promotes the electronics flowing of different location on the first diffusion part 1111,
Reduce internal resistance.
The gate electrode line 1311, the side electrode 132, the bottom-side electrodes 133 and the first electrode 12 can lead to
It crosses to be sintered after type metal slurry on the silicon substrate 11 and be made.
The side electrode 132 covers the surface that second diffusion part 1112 deviates from the silicon substrate 11
In the present embodiment, in order to improve the contact area increased between the second electrode 13 and the diffusion layer 111,
It is avoided simultaneously there is a situation where electric leakage and short circuit, the side electrode 132 covers second diffusion part 1112 away from the silicon
The surface of substrate 11, the bottom-side electrodes 133 cover the surface that the third diffusion part 1113 deviates from the silicon substrate 11.
Al-BSF 14 is formed on the shady face, the first electrode 12 is located in the Al-BSF 14, the aluminium back
14 and the diffusion layer 111 it is mutually isolated, it is described it is " mutually isolated " refer to the Al-BSF 14 and the diffusion layer 111 it
Between there are gap or carry out insulation set, specifically, the Al-BSF 14 and second diffusion layer 111 and the third are spread
Layer 111 is mutually isolated, and since Al-BSF 14 is for exporting positive charge, and diffusion layer 111 avoids the aluminium for exporting negative electrical charge
Back surface field 14 and the diffusion layer 111 directly contact, and can avoid causing to leak electricity.The Al-BSF 14 can be by being coated in institute containing aluminum slurry
The surface and sintering for stating the first silicon type portion obtain, and by forming Al-BSF 14 in first silicon type portion, it is dense to be capable of forming high alumina
Spend the P+ layer of doping, reduction minority carrier overleaf compound probability is conducive between silicon substrate 11 and first electrode 12
Current transmission.
It should be noted that in other embodiments, the Al-BSF 14 can also be replaced by the back surface field that other materials is formed,
Such as boron back surface field.
In the present embodiment, the solar battery sheet 1 further includes antireflection layer 15, and the antireflection layer 15 is covered in institute
State the phototropic face of silicon substrate 11, at least partially embedded antireflection layer 15 of front electrode 131, and the front electrode
131 form Ohmic contact with the phototropic face of the silicon substrate 11, specifically, the front electrode 131 passes through metal paste printing
On 15 surface of antireflection layer, during the sintering process, the metal paste of front electrode 131 can burn the reflecting layer of lower section and then and silicon
Substrate 11 reacts to form Ohmic contact.
The antireflection layer 15 is hyaline layer, can be by sol-gel method, chemical vapour deposition technique or magnetron sputtering legal system
, effect is the reflection for reducing the silicon substrate 11 to sunray, improves light utilization.
The solar cell panel assembly structure of some embodiments of the invention offer is described below in conjunction with Fig. 1, Fig. 5 and Figure 13.
Provide a kind of solar cell panel assembly, including backsheet layer 2, the first glue-line 4, the second glue-line 3, cover layer 5 with
And solar battery sheet 1 as described above, the backsheet layer 2, the first glue-line 4, solar battery sheet 1, the second glue-line 3 and cover layer
5 stack gradually.
First glue-line 4 and the second glue-line 3 are each independently selected from ethylene-vinyl acetate copolymer, polyvinyl alcohol contracting
One of butyraldehyde, transparent silicon glue-line and polyolefin layer or multiple combinations.
As shown in Figure 1, the backsheet layer 2 further includes bottom plate 21 and insulating layer 22, the metallic conduction part 25 and it is described absolutely
Edge layer 22 is respectively positioned on 21 top of bottom plate, and multiple solar battery sheets 1 are realized by the metallic conduction part 25 and are electrically connected,
The insulating layer 22 is covered in the region that the metal circuitry periphery is exposed on the bottom plate 21.
The assembling mode of above-mentioned backsheet layer 2 and solar battery sheet 1, which has the advantage that, reduces welding difficulty and component
The operation difficulty arranged, the safety such as short circuit, electric leakage caused by avoiding during welding and arranging, matrix deformation and fracture are hidden
Suffer from problem.
The insulating layer 22 is white Reflection layer, from the light for being incident on gap solar battery sheet 1 across cover layer 5
Line is incident on cover layer 5 after white Reflection layer reflection, then continues to be reflected on solar battery sheet 1 by cover layer 5 and utilize,
The utilization rate of photon is thus further improved, the output power of photovoltaic module is improved.
In the present embodiment, the insulating layer 22 is the polymer material layer containing white filler, the white filler packet
Include the one or more of white carbon black and titanium dioxide.
The polymer material layer is fluorocarbon resin layer, diallyl isophthalate layer, polyvinylidene fluoride layer, poly- second
Alkene layer, fluorocarbon resin modified poly nitride layer, diallyl isophthalate modified poly nitride layer, gathers partially polytetrafluoroethylene ethylene layer
At least one of fluoride modified polymeric layer, PE modified polymeric layer and polytetrafluoroethylmodified modified polymeric layer.Tool
There is the features such as high reflectivity, resistance to ag(e)ing is excellent.
The white Reflection layer is adhering closely on the bottom plate 21 by processing technologys such as coating, printing, sprayings.
In the present embodiment, the cover layer 5 includes photovoltaic glass layer, plated film anti reflection glass layer and flannelette anti-reflective glass
One or more layers combination of layer.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (18)
1. a kind of solar cell panel assembly, which is characterized in that including backsheet layer and be arranged on the backsheet layer it is multiple too
Positive energy cell piece, the solar battery sheet include silicon substrate, first electrode and second electrode, and the silicon substrate has to light
Face, shady face and the side being surrounded between the phototropic face and shady face, the first electrode are located at the back of the silicon substrate
Smooth surface, the second electrode include the side electrode and front electrode being electrically connected to each other, and the side electrode is located at the silicon substrate
The side of plate, the front electrode are located at the phototropic face of the silicon substrate；
Metallic conduction part is provided on the backsheet layer, the metallic conduction part includes metal bottom surface and protrudes metal, described convex
Metal is convexed to form upwardly by the metal bottom out；
Two adjacent solar battery sheets are electrically connected by the metallic conduction part, the metal bottom surface and one of sun
The first electrode electrical connection of energy cell piece, the protrusion metal are electrically connected with the side electrode of another solar battery sheet.
2. solar cell panel assembly according to claim 1, which is characterized in that the second electrode further includes bottom surface electricity
Pole, the bottom-side electrodes are located at the shady face of the silicon substrate, and the bottom-side electrodes are electrically connected with the side electrode.
3. solar cell panel assembly according to claim 2, which is characterized in that another described solar battery sheet
Bottom-side electrodes be electrically connected with the metal bottom surface.
4. solar cell panel assembly according to claim 3, which is characterized in that the metallic conduction part is inverted T shaped knot
Structure, the protrusion metal are located at the top center position of the metal bottom surface and raise upward, two neighboring solar battery sheet
In, the first electrode of one of solar battery sheet and the bottom-side electrodes of another solar battery sheet are located at described convex
It the two sides of metal and is in electrical contact out with the metal bottom surface, and the side electrode of another solar battery sheet and the protrusion are golden
Belong to electrical contact.
5. solar cell panel assembly according to claim 3, which is characterized in that the metallic conduction part is L-type structure,
The protrusion metal is located at the marginal position of the metal bottom surface and raises upward, in two neighboring solar battery sheet, wherein
The first electrode of one solar battery sheet and the bottom-side electrodes of another solar battery sheet are respectively positioned on the protrusion metal
Ipsilateral and be in electrical contact with the metal bottom surface, and the side electrode of another solar battery sheet connects with the protrusion metal electricity
Touching.
6. solar cell panel assembly according to claim 4 or 5, which is characterized in that the silicon substrate is rectangular configuration,
The first electrode and the bottom-side electrodes are located at the two sides on the shady face in the width direction, and the first electrode
Strip structure is extended to form along the end edge of the shady face, the bottom-side electrodes extend along the end edge of the shady face
Form strip structure.
7. solar cell panel assembly according to claim 1, which is characterized in that be formed with diffusion on the silicon substrate
Layer, the diffusion layer include the first diffusion part and the second diffusion part；
First diffusion part is formed in the phototropic face of the silicon substrate, and the front electrode is electrically connected with first diffusion part
It connects；
Second diffusion part is formed in the side of the silicon substrate, and the side electrode is electrically connected with second diffusion part.
8. solar cell panel assembly according to claim 2, which is characterized in that be formed with diffusion on the silicon substrate
Layer, the diffusion layer include the first diffusion part, the second diffusion part and third diffusion part, and the both ends of second diffusion part connect respectively
Connect first diffusion part and the third diffusion part；
First diffusion part is formed in the phototropic face of the silicon substrate, and the front electrode is electrically connected with first diffusion part
It connects；
Second diffusion part is formed in the side of the silicon substrate, and the side electrode is electrically connected with second diffusion part；
The third diffusion part is formed in the shady face of the silicon substrate, and the bottom-side electrodes are electrically connected with the third diffusion part
It connects.
9. solar cell panel assembly according to claim 7 or 8, which is characterized in that the front electrode includes multiple
The gate electrode line being parallel to each other, the gate electrode line by one end of first diffusion part extend to the other end and with the side
Electrode electrical connection.
10. solar cell panel assembly according to claim 7 or 8, which is characterized in that described in the side electrode covering
Second diffusion part deviates from the surface of the silicon substrate.
11. solar cell panel assembly according to claim 8, which is characterized in that bottom-side electrodes covering described the
Three diffusion parts deviate from the surface of the silicon substrate.
12. solar cell panel assembly according to claim 7 or 8, which is characterized in that on the shady face of the silicon substrate
It is formed with Al-BSF, the first electrode is located in the Al-BSF, and the Al-BSF and the diffusion layer are mutually isolated.
13. solar cell panel assembly according to claim 1, which is characterized in that the solar battery sheet further includes
Antireflection layer, the antireflection layer are covered in the phototropic face of the silicon substrate, and the front electrode is at least partially embedded described to be subtracted
Reflecting layer, and the phototropic face of the front electrode and the silicon substrate forms Ohmic contact.
14. solar cell panel assembly according to claim 1, which is characterized in that the backsheet layer further include bottom plate and
Insulating layer, the metallic conduction part and the insulating layer are respectively positioned at the top of the bottom plate, and the insulating layer is covered in the bottom plate
The region that upper metallic conduction part periphery is exposed.
15. solar cell panel assembly according to claim 14, which is characterized in that the insulating layer is white reflection
Layer.
16. solar cell panel assembly according to claim 15, which is characterized in that the insulating layer is to fill out containing white
The polymer material layer of material, the white filler include white carbon black and/or titanium dioxide.
17. solar cell panel assembly according to claim 1, which is characterized in that the solar cell panel assembly is also
Including the first glue-line, the second glue-line and cover layer, the backsheet layer, the first glue-line, solar battery sheet, the second glue-line and cover board
Layer stacks gradually.
18. solar cell panel assembly according to claim 17, which is characterized in that the cover layer includes photovoltaic glass
One or more layers combination of layer, plated film anti reflection glass layer and flannelette anti-reflective glass layer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466965A (en) * | 2020-11-19 | 2021-03-09 | 晶科绿能(上海)管理有限公司 | Back contact solar cell piece with extension electrode and solar cell module |
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| CN205863186U (en) * | 2016-06-30 | 2017-01-04 | 比亚迪股份有限公司 | Cell piece assembly, cell piece matrix and solar module |
| CN205863187U (en) * | 2016-06-30 | 2017-01-04 | 比亚迪股份有限公司 | Cell piece assembly, cell piece matrix and solar module |
| US20170092795A1 (en) * | 2015-09-28 | 2017-03-30 | Kabushiki Kaisha Toyota Jidoshokki | Interconnector and solar panel |
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| US4110122A (en) * | 1976-05-26 | 1978-08-29 | Massachusetts Institute Of Technology | High-intensity, solid-state-solar cell device |
| US20170092795A1 (en) * | 2015-09-28 | 2017-03-30 | Kabushiki Kaisha Toyota Jidoshokki | Interconnector and solar panel |
| CN205863186U (en) * | 2016-06-30 | 2017-01-04 | 比亚迪股份有限公司 | Cell piece assembly, cell piece matrix and solar module |
| CN205863187U (en) * | 2016-06-30 | 2017-01-04 | 比亚迪股份有限公司 | Cell piece assembly, cell piece matrix and solar module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112466965A (en) * | 2020-11-19 | 2021-03-09 | 晶科绿能(上海)管理有限公司 | Back contact solar cell piece with extension electrode and solar cell module |
| US11380807B2 (en) | 2020-11-19 | 2022-07-05 | Jinko Green Energy (shanghai) Management Co., Ltd. | Back-contact solar cell and solar cell module including same |
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