CN110212048A - Back contacts lamination solar battery string and back contacts lamination solar module - Google Patents
Back contacts lamination solar battery string and back contacts lamination solar module Download PDFInfo
- Publication number
- CN110212048A CN110212048A CN201910465319.4A CN201910465319A CN110212048A CN 110212048 A CN110212048 A CN 110212048A CN 201910465319 A CN201910465319 A CN 201910465319A CN 110212048 A CN110212048 A CN 110212048A
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- back contacts
- solar cell
- cell piece
- pieces
- battery string
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- 238000003475 lamination Methods 0.000 title claims abstract description 58
- 230000000149 penetrating effect Effects 0.000 claims abstract description 50
- 239000012790 adhesive layer Substances 0.000 claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 239000004020 conductor Substances 0.000 claims description 9
- 229910000679 solder Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 239000001993 wax Substances 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims 1
- 229920000178 Acrylic resin Polymers 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000011799 hole material Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011267 electrode slurry Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- -1 conducting resinl Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000009466 transformation Effects 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
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0516—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module specially adapted for interconnection of back-contact solar cells
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
This application discloses a kind of back contacts lamination solar battery string and back contacts lamination solar modules, the back contacts solar cell piece that muti-piece including successively overlapping arrangement is serially connected, the anode and cathode of back contacts solar cell piece are arranged at the back side of back contacts solar cell piece, several through holes are arranged in the one side edge of back contacts solar cell piece, electrode is formed through in through hole, one in the anode and cathode of back contacts solar cell piece leads to the front of back contacts solar cell piece by penetrating electrode；For two pieces of adjacent back contacts solar cell pieces there are overlapping region, the through hole of underlying back contacts solar cell piece is located at overlapping region, and two pieces of adjacent back contacts solar cell pieces are connected by the penetrating electrode of underlying back contacts solar cell piece；Insulation adhesive layer is provided between two pieces of adjacent back contacts solar cell pieces, insulation adhesive layer is located at overlapping region.Insulation adhesive layer can reduce the risk of cell piece crack.
Description
Technical field
The present invention relates generally to photovoltaic arts, and in particular to back contacts solar module field more particularly to a kind of back
Contact lamination solar battery string and back contacts lamination solar module.
Background technique
Stacked wafer moudle (also referred to as imbrication component) technology is a kind of novel component design, and cell piece is superimposed and is arranged
Cloth, and connect into battery strings by materials such as conducting resinl, tin creams, using being laminated into component after series-parallel typesetting.Pass through improvement
The interconnection architecture of cell piece designs, and can arrange more cell pieces in limited area, improve the utilization rate of spatial area
With the generated output of component.
Currently, back contact solar cell (such as IBC, MWT, EWT solar cell) is got the attention, due to its front
There is no main gate line, even without any electrode pattern, positive and cathode is all located at the back side of cell piece, reduces the screening of cell piece
Light is improved the energy conversion efficiency of cell piece to effectively increase the short circuit current of cell piece.
During lamination, when lamination to back contacts solar cell piece, back connects existing back contacts solar cell piece
Touching solar cell piece is easy to produce crack.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of back contacts lamination for reducing cell piece crack
Solar battery string and back contacts lamination solar module.
In a first aspect, back contacts lamination solar battery string of the invention,
The back contacts solar cell piece that muti-piece including successively overlapping arrangement is serially connected, the back contacts solar cell piece
Anode and cathode be arranged at the back side of the back contacts solar cell piece, the one side edge of the back contacts solar cell piece
Several through holes are set, electrode, the anode of the back contacts solar cell piece and institute are formed through in the through hole
State in cathode front that the back contacts solar cell piece is led to by the penetrating electrode；
There are overlapping region, the underlying back contacts sun electricity for the back contacts solar cell piece of adjacent two pieces
The through hole of pond piece is located at the overlapping region, and the back contacts solar cell piece of adjacent two pieces passes through underlying
The penetrating electrode of the back contacts solar cell piece is connected；
Insulation adhesive layer is provided between the back contacts solar cell piece of adjacent two pieces, the insulation adhesive layer is located at
The overlapping region, and the insulation adhesive layer does not cover the penetrating electrode.
Second aspect, back contacts lamination solar module of the invention, multiple back contacts laminations including electrical connection are too
Positive battery strings.
According to technical solution provided by the embodiments of the present application, by being set between two pieces of adjacent back contacts solar cell pieces
Insulation adhesive layer is set, when being laminated back contacts solar cell piece, insulation adhesive layer can play buffer function, reduce back contacts too
Stress between positive cell piece reduces the risk of cell piece crack, meanwhile, insulation adhesive layer can be improved back contacts solar cell
Bonding strength between piece improves the reliability of back contacts lamination solar module, meanwhile, insulation adhesive layer can be avoided back
It contacts solar cell piece and generates short circuit, be able to solve cell piece crack risk in existing back contacts solar cell piece lamination process
Big problem.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is that the back contacts solar cell piece of the back contacts lamination solar battery string of the embodiment of the present invention is no main grid back
Contact the structural schematic diagram of solar cell piece；
Fig. 2 is that the back contacts solar cell piece of the back contacts lamination solar battery string of the embodiment of the present invention is to have main grid back
Contact the structural schematic diagram of solar cell piece；
Fig. 3 is the structural schematic diagram of the back contacts lamination solar battery string side of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram at the back contacts lamination solar battery string back side of the embodiment of the present invention；
Fig. 5 is the front knot of the back contacts solar cell piece of the back contacts lamination solar battery string of one embodiment of the invention
Structure schematic diagram；
Fig. 6 is the front of the back contacts solar cell piece of the back contacts lamination solar battery string of another embodiment of the present invention
Structural schematic diagram；
Fig. 7 is the front of the back contacts solar cell piece of the back contacts lamination solar battery string of another embodiment of the present invention
Structural schematic diagram；
Fig. 8 is that the back contacts solar cell piece in the back contacts lamination solar module of the embodiment of the present invention is second-class
Divide the structural schematic diagram of regular hexagon back contacts solar cell piece；
Fig. 9 is that the back contacts solar cell piece in the back contacts lamination solar module of the embodiment of the present invention is four etc.
Divide the structural schematic diagram of regular hexagon back contacts solar cell piece.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
One of embodiment of the invention is to please refer to Fig. 1-3, back contacts lamination solar battery string of the invention, packet
The back contacts solar cell piece 10 that successively overlapping muti-piece is serially connected is included, the anode and cathode of back contacts solar cell piece 10 are equal
The back side of back contacts solar cell piece 10 is set, and the one side edge of back contacts solar cell piece 10 is arranged several through holes, passes through
Be formed through electrode 11 in perforation, one in the anode and cathode of back contacts solar cell piece 10 by penetrating electrode 11 and
Lead to the front of back contacts solar cell piece 10；
There are overlapping region, underlying back contacts solar cell pieces 10 for two pieces of adjacent back contacts solar cell pieces 10
Through hole be located at overlapping region, two pieces of adjacent back contacts solar cell pieces 10 pass through underlying back contacts solar cell
The penetrating electrode 11 of piece 10 is connected；
Insulation adhesive layer 20 is provided between two pieces of adjacent back contacts solar cell pieces 10, insulation adhesive layer 20 is located at weight
Folded region, and the adhesive layer that insulate does not cover penetrating electrode.Since insulation adhesive layer does not cover penetrating electrode, to will pass through electrode
Expose, to not influence being electrically connected between penetrating electrode and adjacent back contacts solar cell piece.
In an embodiment of the present invention, the anode of back contacts solar cell piece 10 and cathode are arranged at back contacts sun electricity
The back side of pond piece 10, the light-receiving surface of cell piece is electrodeless to shut out the light, and improves the power of back contacts lamination solar module.
Penetrating electrode 11 is electrically connected with the anode at 10 back side of back contacts solar cell piece or cathode, and by the back contacts sun
The anode or cathode at 10 back side of cell piece are drawn out to the front of back contacts solar cell piece 10.Specifically, if penetrating electrode
11 are electrically connected with the anode at 10 back side of back contacts solar cell piece, then penetrating electrode 11 is by 10 back side of back contacts solar cell piece
Anode lead to the front of back contacts solar cell piece 10；If penetrating electrode 11 is negative with 10 back side of back contacts solar cell piece
It is extremely adjacent, then the cathode at 10 back side of back contacts solar cell piece is being led to back contacts solar cell piece 10 just by penetrating electrode 11
Face reduces consequently facilitating muti-piece back contacts solar cell piece 10, which is carried out lamination, forms back contacts lamination solar module
Series resistance and electronics damage, improve the power of stacked wafer moudle.There is overlapping in two pieces of adjacent back contacts solar cell pieces 10
Region, that is, muti-piece back contacts solar cell piece 10 is carried out successively to overlap arrangement, do not have between back contacts solar cell piece 10
There is gap, take full advantage of area workable for assembly surface, improves the transformation efficiency and delivery efficiency of component.
The through hole of underlying back contacts solar cell piece 10 is located at overlapping region, can reduce overlapping region to back
Blocking for the light-receiving surface of solar cell piece 10 is contacted, so that the structure of back contacts lamination solar module is more reasonable.
Insulation adhesive layer 20, and the adhesive layer 20 that insulate are provided between two pieces of adjacent back contacts solar cell pieces 10
Positioned at overlapping region, the adhesive layer 20 that insulate can play buffering when being laminated to back contacts lamination solar module and make
With reducing stress of the two pieces of adjacent back contacts solar cell pieces 10 between overlapping region, it is hidden to reduce back contacts solar cell
The risk split, meanwhile, insulation adhesive layer 20 can play the role of connecting two pieces of adjacent back contacts solar cell pieces 10, improve
Bonding strength between back contacts solar cell piece 10 improves the reliability of back contacts lamination solar module.Meanwhile it insulating
Adhesive layer 20 can be avoided back contacts solar cell piece 10 and generate short circuit.Specifically, with penetrating electrode 11 and back contacts sun electricity
10 back side of pond piece anode electrical connection for be described in detail, penetrating electrode 11 by 10 back side of back contacts solar cell piece just
Pole is drawn out to 10 front of back contacts solar cell piece, the cathode of penetrating electrode 11 and another piece of 10 back side of back contacts solar cell piece
Electrical connection, to realize that the back contacts solar cell piece 10 of adjacent two pieces is serially connected, insulation adhesive layer 20 can be isolated
The anode of penetrating electrode 11 and another piece of 10 back side of back contacts solar cell piece avoids generating between back contacts solar cell piece 10
Short circuit improves the stability and reliability of back contacts lamination solar module, ensure that back contacts lamination solar module
Generating efficiency.
Further, penetrating electrode 11 is located at the end of the anode of back contacts solar cell piece 10 or the end of cathode；
Do not continue to extend that is, positive or negative pole extends to after through hole, but ends at through hole, it in this way can be with
Make through hole close to the edge of cell piece, overlapping area is smaller when overlapping, avoids influencing back contacts solar cell piece 10
Light-receiving surface, to ensure that the delivery efficiency of back contacts lamination solar module.
Further, insulation adhesive layer 20 is located at around penetrating electrode 11 or between two adjacent penetrating electrode 11,
The stability that adjacent back contacts solar cell piece 10 connects is improved, while can also play insulating effect, avoids adjacent pass through
It wears and generates electrical connection between electrode 11, improve the reliability of back contacts lamination solar module.
As shown in figure 5, insulation adhesive layer 20 is made of several spaced ring-like patterns, and each ring-like pattern position
Around penetrating electrode 11.
As shown in fig. 6, insulation adhesive layer 20 is by several spaced strip figure constitutions, and each strip figure
For morpheme between two adjacent penetrating electrode 11, the length direction of strip figure is vertical with 11 arragement direction of penetrating electrode.
As shown in fig. 7, insulation adhesive layer 20 is by several spaced strip figure constitutions, and each strip figure
Morpheme between two adjacent penetrating electrode 11, the length direction of strip figure it is parallel with 11 arragement direction of penetrating electrode or
Person is overlapped.
Further, insulation adhesive layer 20 is dielectric ink, insulating wax, epoxy resin, polyurethane resin, acrylic acid tree
Rouge, organic siliconresin or solder mask.
Further, each penetrating electrode 11 is fixedly connected to pad, and pad is located at back contacts solar cell piece 10
Front, pad can increase the area of penetrating electrode 11, convenient for by the electrode at 10 back side of back contacts solar cell piece and through electricity
Pole 11 is electrically connected, and reduces the difficulty of processing of back contacts lamination solar module.
Further, it is provided with gap between adjacent pad, avoids generating electrical connection between adjacent penetrating electrode 11,
Improve the reliability of back contacts lamination solar module.
Further, the shape of through hole is round, rectangular or oval.In this way convenient for being processed to through hole, protect
The bond strength for demonstrate,proving penetrating electrode 11 and back contacts solar cell piece 10, improves the reliable of back contacts lamination solar module
Property.
Further, underlying back contacts solar cell piece 10 in two pieces of adjacent back contacts solar cell pieces 10
Penetrating electrode 11 and the electrode of another back contacts solar cell piece 10 are electrically connected by electric conductor, are connected by electric conductor
The electrode of penetrating electrode 11 and another back contacts solar cell piece 10, so that two pieces of adjacent back contacts solar cell pieces 10 are realized
It is overlapping to arrange, it is very close to each other between cell piece, area workable for assembly surface is taken full advantage of, the conversion effect of component is improved
Rate and output power.
Further, electric conductor be plasma-based material, it is conductive tape, solder, soldering paste, conductive ink, isotropic conductive adhesive, each
Anisotropy conducting resinl, metallic conductor or metal alloy conductor.
Further, penetrating electrode 11 is filled in through hole, that is to say, that electrode slurry can be filled in through hole
Material, sintered electrode slurry form penetrating electrode.
Further, the width of overlapping region is 0.1-3mm, can guarantee that adjacent back contacts solar cell piece 10 passes through
The stability that penetrating electrode 11 connects, meanwhile, avoid penetrating electrode 11 is excessive from blocking damage caused by the light-emitting surface of solar cell piece
Consumption, reduces resistance loss, improves the power of back contacts lamination solar module.If adjacent back contact solar cell
The width of the overlapping region of piece is less than 0.1mm, and the area of through hole processing difficulties, common electrode is smaller, influences the transmission of electric current
With the reliability of contact；If the width of the overlapping region of adjacent back contacts solar cell piece 10 is greater than 3mm, because of overlapping region
Area is larger, and the photoelectric conversion efficiency of solar energy cannot be obviously improved, moreover, overlapping region area is bigger, cell piece
Invalid is also more.Can with but not just for, the width of the overlapping region of adjacent cell piece is 0.5-2mm.
Further, back contacts solar cell piece 10 is full wafer cell piece or is obtained by full wafer cell piece etc. point cutting
Sub- solar cell piece, when back contacts solar cell piece 10 is the sub- solar cell piece obtained by full wafer cell piece etc. point cutting,
Wherein it is possible to but not just for back contacts solar cell piece 10 is second-class along its thin grid line direction is parallel to by full wafer cell piece
Point, trisection, the quartering, five equal parts or six equal parts cut the half piece solar cell piece to be formed, one third piece too
Positive cell piece, quarter-wave plate solar cell piece, five/a piece of solar cell piece or six/a piece of solar cell piece, will be whole
Piece cell piece cuts to form multiple sub- solar cell pieces, can reduce the resistance of monolithic back contacts solar cell piece 10, reduces every
The electric current of a string of battery pack strings improves the output power of battery component to reduce the influence of electrode resistance loss.
Further, laser cutting is carried out to the one side edge of back contacts solar cell piece 10 and forms several through holes, energy
It is enough to improve the precision and accuracy for running through hole machined.
With reference to Fig. 1, just superfine grid line 12, the thin grid line 13 of cathode, p-type has been can be set in 10 back side of back contacts solar cell piece
Doped region and n-type doping region, just superfine grid line 12 are contacted with p-type doping region, the thin grid line 13 of cathode and n-type doping region
Contact, penetrating electrode 11 are electrically connected with just superfine grid line 12 or the thin grid line 13 of cathode.Electrode is through shown in certain Fig. 1
11 are electrically connected with just superfine grid line 12, and penetrating electrode 11 can also be electrically connected with the thin grid line 13 of cathode.
With reference to Fig. 2, just superfine grid line, the thin grid line of cathode, p-type doping has been can be set in 10 back side of back contacts solar cell piece
Region and n-type doping region, just superfine grid line are contacted with P-doped zone domain, and the thin grid line of cathode is contacted with n-type doping region, just
Superfine grid line be electrically connected with positive connection electrode 14, and the thin grid line of cathode is electrically connected with cathode connection electrode 15, penetrating electrode 11 and
Positive connection electrode 14 or cathode connection electrode 15 are electrically connected.Certainly the electrode 11 shown in Figure 2 that is through is connect with anode
Electrode 14 is electrically connected, and penetrating electrode 11 can also be electrically connected with cathode connection electrode 15.Positive connection electrode 14 and the thin grid of cathode
It is provided with insulating materials 16 between line, positive connection electrode is avoided to be electrically connected with the thin grid line of cathode.Cathode connection electrode 15 with just
It is provided with insulating materials 16 between superfine grid line, cathode connection electrode is avoided to be electrically connected with just superfine grid line.
With reference to Fig. 4, relationship is put as shown in figure 3, sequentially overlapping between adjacent both sides back contacts solar cell piece 10
It arranges before muti-piece back contacts solar cell piece 10, two pieces of adjacent back contacts solar cell pieces 10 is reversely put, so that phase
The anode of any back contacts solar cell piece in adjacent two pieces of back contacts solar cell pieces and another back contacts solar cell piece
Cathode is conllinear, so that the positive and negative anodes of adjacent two pieces of back contacts solar cell pieces can face, convenient for by adjacent two pieces of back
Contact solar cell piece is electrically connected.
Another embodiment of the invention is a kind of back contacts lamination solar module, multiple back including electrical connection
Contact lamination solar battery string.
In an embodiment of the present invention, the back contacts solar cell piece lamination arrangement in battery strings, structure is simple, reliability
It is high.It can reduce series resistance and resistance loss, the power of lifting assembly.
With reference to Fig. 8 and 9, further, component is square, and is filled out in square region 30 by multiple back contacts solar cell pieces 10
Full, back contacts solar cell piece 10 is obtained by equal part regular hexagon back contacts solar cell piece.
In an embodiment of the present invention, solar cell piece is obtained by equal part regular hexagon back contacts solar cell piece, and
And the light-receiving area of each solar cell piece is equal, each solar cell piece can directly be connected, and simplifies connection circuit, guarantees each
The corresponding electric current of the maximum power point of solar cell piece group is identical, can be avoided concatenated solar cell piece and generates bucket effect,
Improve the generating efficiency of solar module.Meanwhile, it is capable to avoid relative to traditional quadrangle or subquadrate, it can
The utilization rate for improving silicon rod raw material, reduces the waste of raw material, reduces production cost, meanwhile, it is filled out in frame by solar cell piece
It is full, traditional quadrangle or subquadrate solar cell piece are compared, does not need that chamfering is arranged in edge, avoids tradition and fall
Positioned at the waste of the white space of chamfered area when angle subquadrate cell piece is laid with, the light of solar module can be improved
Area, component power and generating efficiency.
As shown in figure 8, solar cell piece can obtain to halve regular hexagon back contacts solar cell piece；Such as Fig. 9 institute
Show, solar cell piece may be that quartering regular hexagon back contacts solar cell piece obtains.It only needs to meet solar cell piece
Frame is filled up.The gap between solar cell piece and frame is reduced, the light-receiving area of solar module is improved.
It is, of course, understood that the cell piece of component of the invention is also possible to the cell piece of conventional shape, not office
It is limited to Special-shaped battery piece.
In one embodiment of the invention, the quantity of the through hole in single back contacts lamination solar module is
60-3000.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (12)
1. a kind of back contacts lamination solar battery string, which is characterized in that the back that the muti-piece including successively overlapping arrangement is serially connected
Solar cell piece is contacted, the anode and cathode of the back contacts solar cell piece are arranged at the back contacts solar cell piece
The back side, the one side edge of the back contacts solar cell piece are arranged several through holes, are formed through electrode in the through hole,
One in the anode of the back contacts solar cell piece and the cathode leads to the back by the penetrating electrode
Contact the front of solar cell piece；
There are overlapping region, the underlying back contacts solar cell pieces for the back contacts solar cell piece of adjacent two pieces
The through hole be located at the overlapping region, the back contacts solar cell piece of adjacent two pieces passes through underlying described
The penetrating electrode of back contacts solar cell piece is connected；
Insulation adhesive layer is provided between the back contacts solar cell piece of adjacent two pieces, the insulation adhesive layer is located at described
Overlapping region, and the insulation adhesive layer does not cover the penetrating electrode.
2. back contacts lamination solar battery string according to claim 1, which is characterized in that the insulation adhesive layer is located at institute
It states around penetrating electrode or between two adjacent penetrating electrode.
3. back contacts lamination solar battery string according to claim 1, which is characterized in that the insulation adhesive layer is insulation
Ink, insulating wax, epoxy resin, polyurethane resin, acrylic resin, organic siliconresin or solder mask.
4. back contacts lamination solar battery string according to claim 1, which is characterized in that the penetrating electrode is located at described
The end of the anode of back contacts solar cell piece or the end of the cathode.
5. back contacts lamination solar battery string according to claim 1, which is characterized in that each penetrating electrode is solid
Surely it is connected with pad, the pad is located at the front of the back contacts solar cell piece.
6. back contacts lamination solar battery string according to claim 5, which is characterized in that set between the adjacent pad
It is equipped with gap.
7. back contacts lamination solar battery string according to claim 1, which is characterized in that the shape of the through hole is circle
It is shape, rectangular or oval.
8. back contacts lamination solar battery string according to claim 1, which is characterized in that two pieces of adjacent back contacts
The penetrating electrode of the underlying back contacts solar cell piece and another back contacts sun in solar cell piece
The electrode of cell piece is electrically connected by electric conductor.
9. back contacts lamination solar battery string according to claim 8, which is characterized in that the electric conductor be plasma-based material,
Conductive tape, solder, soldering paste, conductive ink, isotropic conductive adhesive, anisotropy conductiving glue, metallic conductor or metal close
Golden conductor.
10. back contacts lamination solar battery string according to claim 1, which is characterized in that the penetrating electrode is filled in
In the through hole.
11. a kind of back contacts lamination solar module, which is characterized in that multiple claim 1-10 including electrical connection are any
Back contacts lamination solar battery string described in.
12. back contacts lamination solar module according to claim 11, which is characterized in that the component is square,
It is filled up in the square region by multiple back contacts solar cell pieces, the back contacts solar cell piece passes through equal part regular hexagon
Back contacts solar cell piece obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465319.4A CN110212048A (en) | 2019-05-30 | 2019-05-30 | Back contacts lamination solar battery string and back contacts lamination solar module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465319.4A CN110212048A (en) | 2019-05-30 | 2019-05-30 | Back contacts lamination solar battery string and back contacts lamination solar module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110212048A true CN110212048A (en) | 2019-09-06 |
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ID=67789778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910465319.4A Pending CN110212048A (en) | 2019-05-30 | 2019-05-30 | Back contacts lamination solar battery string and back contacts lamination solar module |
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| Country | Link |
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| CN (1) | CN110212048A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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