CN110323300A - Back contacts lamination solar battery string and its manufacturing method, lamination solar module - Google Patents
Back contacts lamination solar battery string and its manufacturing method, lamination solar module Download PDFInfo
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- CN110323300A CN110323300A CN201910465318.XA CN201910465318A CN110323300A CN 110323300 A CN110323300 A CN 110323300A CN 201910465318 A CN201910465318 A CN 201910465318A CN 110323300 A CN110323300 A CN 110323300A
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- back contacts
- presoma
- solar cell
- cell piece
- cathode
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- 238000003475 lamination Methods 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000011267 electrode slurry Substances 0.000 claims abstract description 33
- 238000004513 sizing Methods 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 235000008216 herbs Nutrition 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 210000002268 wool Anatomy 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 238000005245 sintering Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006257 cathode slurry Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- -1 conducting resinl Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 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
-
- 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
- H01L31/0508—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 the interconnection means having a particular shape
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
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- Condensed Matter Physics & Semiconductors (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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- Manufacturing & Machinery (AREA)
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Abstract
This application discloses a kind of back contacts lamination solar battery string and its manufacturing methods, lamination solar module, the following steps are included: the one side edge in back contacts solar cell piece forms several through holes, the through hole runs through the back contacts solar cell piece along the thickness direction of the back contacts solar cell piece；In the back up anode sizing agent and negative electrode slurry of the back contacts solar cell piece, and the anode sizing agent and the negative electrode slurry are dried, form positive presoma and cathode presoma；Back contacts solar cell piece described in arrangement muti-piece is sequentially overlapped, so that two pieces of adjacent back contacts solar cell pieces, there are overlapping region, the through hole of the underlying back contacts solar cell piece is located at the overlapping region；To the positive presoma, the cathode presoma and the perforated electrodes presoma together sinter molding, to obtain anode, cathode and perforated electrodes.Lamination process process is simplified, structure is simple.
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 its manufacturing method, 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.
The electrode of existing back contact solar cell piece is all disposed within the back side of cell piece, and the traditional crystal silicon of no image of Buddha is too
The positive direct lamination arrangement of energy battery, which is got up, forms battery strings by the anode and cathode of conductive glue connection adjacent cell piece.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, back contacts solar cell piece can be realized by being intended to provide one kind
The back contacts lamination solar battery string and its manufacturing method, lamination solar module of lamination arrangement.
In a first aspect, the manufacturing method of back contacts lamination solar module of the invention, comprising the following steps:
Form several through holes in the one side edge of back contacts solar cell piece, the through hole along the back contacts too
The thickness direction of positive cell piece runs through the back contacts solar cell piece；The back contacts solar cell piece back up just
Pole slurry and negative electrode slurry, and the anode sizing agent and the negative electrode slurry are dried, positive presoma is formed and born
Pole presoma；
Back contacts solar cell piece described in arrangement muti-piece is sequentially overlapped, so that two pieces of adjacent back contacts solar cells
There are overlapping region, the through holes of the underlying back contacts solar cell piece to be located at the overlapping region for piece；
Electrode slurry filled to the through hole of the back contacts solar cell piece after overlapping, and to the electrode slurry into
Row drying forms perforated electrodes presoma；One end of the perforated electrodes presoma and a back contacts solar cell piece
A connection in positive presoma and cathode presoma, the other end of the perforated electrodes presoma connect with the adjacent back
Touch another connection in the positive presoma and cathode presoma of solar cell piece；
To the positive presoma, the cathode presoma and the perforated electrodes presoma together sinter molding, to obtain
Obtain positive, cathode and perforated electrodes.
Second aspect, back contacts lamination solar battery string of the invention, by the manufacturer of back contacts lamination solar battery string
Method obtains.
The third 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 forming several run through at back contacts solar cell piece edge
Hole forms positive presoma and cathode presoma in the back up anode sizing agent and negative electrode slurry of back contacts solar cell；
Arrangement muti-piece back contacts solar cell is sequentially overlapped, electrode slurry is filled to through hole, forms perforated electrodes presoma；Then will
Positive presoma, cathode presoma and the once sintered molding of perforated electrodes presoma, electrode slurry are sintered the perforation to be formed electricity
The anode at the back contacts solar cell piece back side or cathode can be drawn out to the front of back contacts solar cell piece by pole, thus real
Muti-piece back contacts solar cell piece is now subjected to lamination arrangement, simplifies lamination process process, structure is simple, high reliablity, energy
Enough solve the problems, such as the lamination arrangement relatively difficult to achieve of existing back contacts solar cell piece.
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 the structure at the back contacts solar cell piece back side of the back contacts lamination solar battery string of the embodiment of the present invention
Schematic diagram；
Fig. 2 is the positive structure of back contacts solar cell piece of the back contacts lamination solar battery string of the embodiment of the present invention
Schematic diagram；
Fig. 3 is the structural schematic diagram of the back contacts lamination solar battery string side of the embodiment of the present invention.
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, the system of back contacts lamination solar battery string of the invention
Make method, comprising the following steps:
Several through holes are formed in the one side edge of back contacts solar cell piece 10, through hole is along back contacts solar cell
The thickness direction of piece 10 runs through back contacts solar cell piece 10；Back contacts solar cell piece 10 back up anode sizing agent and
Negative electrode slurry, and anode sizing agent and negative electrode slurry are dried, form positive presoma and cathode presoma；
Arrangement muti-piece back contacts solar cell piece 10 is sequentially overlapped, so that two pieces of adjacent back contacts solar cell pieces 10 are deposited
In overlapping region, the through hole of underlying back contacts solar cell piece 10 is located at overlapping region；
Electrode slurry is filled to the through hole of the back contacts solar cell piece 10 after overlapping, and electrode slurry is done
It is dry, form perforated electrodes presoma；The positive presoma of one end of perforated electrodes presoma and a back contacts solar cell piece and
A connection in cathode presoma, the anode of the other end of perforated electrodes presoma and adjacent back contacts solar cell piece 10
Another connection in presoma and cathode presoma；
To positive presoma, cathode presoma and perforated electrodes presoma together sinter molding, with obtain anode, cathode and
Perforated electrodes 11.
It should be noted that the step of the step of forming through hole is with positive and negative anodes presoma is formed, there is no special successive
Sequentially, it either, is initially formed after through hole and forms positive and negative anodes presoma, be also possible to be initially formed shape after positive and negative anodes presoma
At through hole.
In an embodiment of the present invention, in the back up anode sizing agent and negative electrode slurry of back contacts solar cell piece 10,
It can by positive presoma, cathode presoma and perforated electrodes presoma together sinter molding to through hole filling electrode slurry
Simplify the process of back contacts solar module lamination process, and structure is simple, high reliablity.
If through hole intersects with anode, the anode at 10 back side of back contacts solar cell piece is drawn out to by perforated electrodes 11
Front, perforated electrodes 11 are connected with the cathode at adjacent another 10 back side of back contacts solar cell piece, to realize adjacent two
Block back contacts solar cell piece 10 is connected；If through hole intersects with cathode, perforated electrodes 11 are by back contacts solar cell piece
The cathode at 10 back sides is drawn out to front, and perforated electrodes 11 are connected with the anode at adjacent another 10 back side of back contacts solar cell piece,
Two pieces of adjacent back contacts solar cell pieces 10 are connected to realize.Perforated electrodes 11 respectively with one piece of back contacts solar cell
The cathode of positive and another piece of solar cell piece of piece 10 is electrically connected, and by once sintered realization, enormously simplifies back
The manufacturing process of lamination solar module is contacted, equipment cost and production cost are reduced.
The lamination process of back contacts lamination solar module, reduces series resistance and resistance loss, is obviously improved folded
The power of piece component.
It, can be with but not just for being connect in back in the back up anode sizing agent and negative electrode slurry of back contacts solar cell piece 10
The back side silk-screen printing anode sizing agent and negative electrode slurry for touching solar cell piece 10, are dried shape to anode sizing agent and negative electrode slurry
At positive presoma and cathode presoma, the accuracy of anode and cathode can be improved.Specifically, dry anode sizing agent and cathode
Slurry makes anode sizing agent and negative electrode slurry dry out, and can fix anode and cathode in this way at 10 back side of back contacts solar cell piece
Position；It should be noted that due to not being sintered at this time and being electrically connected for effect is not formed in positive presoma and cathode presoma
It connects；Electrode slurry is filled in through hole, and electrode slurry is dried to form perforated electrodes presoma, also needs to illustrate
, the also not formed effective electrical connection of perforated electrodes presoma.Before positive presoma, cathode presoma and perforated electrodes
It drives body to be sintered after molding, positive presoma, cathode presoma and perforated electrodes presoma are respectively formed positive, negative
Pole and perforated electrodes, while effective electrical connection is formed between anode, cathode, perforated electrodes.
Sequentially arrangement muti-piece back contacts solar cell piece 10, and there are overlay regions for adjacent back contacts solar cell piece 10
Domain, that is, muti-piece back contacts solar cell piece 10 is carried out sequentially to overlap arrangement, do not have between back contacts solar cell piece 10
Gap takes full advantage of area workable for assembly surface, improves the transformation efficiency and delivery efficiency of component.The back contacts sun
The light-receiving surface of cell piece 10 shuts out the light without any electrode, can be improved component efficiency.
Multiple concatenated back contacts solar cell pieces 10 form laminated batteries strings, and back contacts lamination solar module can be with
For a row or multi-row laminated batteries string, be connected in series between the cell piece of every row's laminated batteries string, difference row laminated batteries strings it
Between in parallel or in series.
In the positive presoma and cathode presoma of one end of perforated electrodes presoma and a back contacts solar cell piece
One connection, the positive presoma and cathode forerunner of the other end of perforated electrodes presoma and adjacent back contacts solar cell piece
Another connection in body, refers specifically to, one piece of back contacts solar cell piece in two pieces of adjacent back contacts solar cell pieces
Positive presoma and another piece of back contacts solar cell piece cathode presoma respectively with the both ends phase of perforated electrodes presoma
Even, thus after being sintered positive presoma, cathode presoma and perforated electrodes presoma, two pieces of adjacent back contacts sun
The cathode of the anode and another piece of back contacts solar cell piece of one piece of back contacts solar cell piece passes through perforated electrodes in cell piece
Realize that electrical connection, that is, two pieces of adjacent back contacts solar cell pieces form series connection.
In Fig. 1, the end of the anode 12 at the back contacts solar cell piece back side, perforated electrodes 11 are arranged in perforated electrodes 11
It is not contacted with the cathode 13 at the back contacts solar cell piece back side.
The electrode slurry filled in anode sizing agent, negative electrode slurry and through hole can be same electrode slurry, can also
To be electrode slurry not of the same race.The sintering temperature for the electrode slurry filled in anode sizing agent, negative electrode slurry and through hole is equal
It is 550-850 DEG C, in this way, when to positive presoma, cathode presoma and perforated electrodes presoma sinter molding together, just
Sintering when highest sintering temperature is as sinter molding together in pole presoma, cathode presoma and perforated electrodes presoma
Temperature avoids sintering temperature from having big difference and causes energy waste；Meanwhile filling in anode sizing agent, negative electrode slurry and through hole
The sintering temperature of electrode slurry be 550-850 DEG C, sintering temperature is not too high, can reduce sintering process to cell piece
Thermal damage improves the yields of back contacts solar cell piece.
Further, through hole is located at the positive end of presoma or the end of cathode presoma, that is to say, that anode
Presoma or cathode presoma do not continue to extend after extending to through hole, through hole can be made close to cell piece in this way
Edge, overlapping area is smaller when overlapping, the light-receiving surface for influencing back contacts solar cell piece 10 is avoided, to ensure that back contacts
The delivery efficiency of lamination solar module.
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, the shape of through hole is round, rectangular or oval, convenient for processing to through hole, is guaranteed
The bond strength of perforated electrodes 11 and back contacts solar cell piece 10 improves the reliable of back contacts lamination solar module
Property.
Further, through hole is formed by laser boring mode, can be improved precision and accuracy through hole machined.
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 perforated electrodes 11 connect, meanwhile, avoid perforated electrodes 11 are 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, further include,
Making herbs into wool, diffusion, doping, polishing, deposition passivating film, aperture are carried out to silicon wafer, obtain back contacts solar cell piece 10,
Silicon wafer is pre-processed to obtain back contacts solar cell piece 10.
Further, it before to positive presoma, cathode presoma and perforated electrodes presoma together sinter molding, also wraps
It includes,
The coating inorganic bonding agent 20 between through hole or around through hole, wherein inorganic adhesive 20 is located at weight
Folded region, inorganic adhesive 20 is between adjacent two pieces of back contacts solar cell pieces 10, to positive presoma, cathode forerunner
Body and perforated electrodes presoma together sinter molding when, can be by inorganic adhesive 20 together sinter molding, so that adjacent two
Block back contacts solar cell piece 10 is formed in overlapping region and is stably connected with, and improves the reliable of back contacts lamination solar module
Property.Meanwhile inorganic adhesive 20 can also play insulating effect, the electrode of perforated electrodes 11 and opposed polarity can be carried out electricity
Isolation；For example, the cathode for the back contacts solar cell piece 10 being located below is electrically connected with perforated electrodes 11, back located above is connect
The anode of touching solar cell piece 10 is electrically connected with perforated electrodes 11, the back contacts solar cell piece located above of inorganic binder 20
Between 10 positive electrode and negative electrode, so that the cathode of perforated electrodes 11 and back contacts solar cell piece 10 located above is carried out electricity
Isolation.The main component of inorganic adhesive 20 is SiO2、B2O3、Bi2O3, ZnO, the thermal expansion coefficient and battery of inorganic adhesive 20
The thermal expansion coefficient of the silicon substrate of piece is close, can cause crack and fragment because thermal expansion coefficient mismatches to avoid after sintering.
10 back side of back contacts solar cell piece is provided with just superfine grid line, the thin grid line of cathode, P-doped zone domain and N-type and mixes
Miscellaneous 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 with just
The electrical connection of pole connection electrode, the thin grid line of cathode are electrically connected with cathode connection electrode.
The anode and negative pole structure of back contacts solar cell piece 10 are as shown in Figure 1, further, and sequentially overlapping, arrangement is more
Before block back contacts solar cell piece 10, two pieces of adjacent back contacts solar cell pieces 10 are reversely put, so that adjacent two pieces
The positive presoma of any back contacts solar cell piece in back contacts solar cell piece and another back contacts solar cell piece
Cathode presoma is conllinear, so that the positive and negative anodes of adjacent two pieces of back contacts solar cell pieces can face, convenient for will be adjacent
Two pieces of back contacts solar cell pieces are electrically connected.
Another embodiment of the invention is a kind of back contacts lamination solar battery string, by the aforementioned back contacts lamination sun
The manufacturing method of battery strings obtains.
In an embodiment of the present invention, the back in battery strings is obtained by the manufacturing method of back contacts lamination solar battery string
The arrangement of solar cell piece lamination is contacted, structure is simple, high reliablity.
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.
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 (10)
1. a kind of manufacturing method of back contacts lamination solar battery string, which comprises the following steps:
Several through holes are formed in the one side edge of back contacts solar cell piece, the through hole is along the back contacts sun electricity
The thickness direction of pond piece runs through the back contacts solar cell piece；It is starched in the back up anode of the back contacts solar cell piece
Material and negative electrode slurry, and the anode sizing agent and the negative electrode slurry are dried, before forming positive presoma and cathode
Drive body；
Back contacts solar cell piece described in arrangement muti-piece is sequentially overlapped, so that two pieces of adjacent back contacts solar cell pieces are deposited
In overlapping region, the through hole of the underlying back contacts solar cell piece is located at the overlapping region；
Electrode slurry is filled to the through hole of the back contacts solar cell piece after overlapping, and the electrode slurry is done
It is dry, form perforated electrodes presoma；The anode of one end of the perforated electrodes presoma and a back contacts solar cell piece
A connection in presoma and cathode presoma, the other end of the perforated electrodes presoma and the adjacent back contacts are too
Another connection in the positive presoma and cathode presoma of positive cell piece；
To the positive presoma, the cathode presoma and the perforated electrodes presoma together sinter molding, to obtain just
Pole, cathode and perforated electrodes.
2. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that the through hole
Positioned at the positive end of presoma or the end of the cathode presoma.
3. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that the back contacts
Solar cell piece is full wafer cell piece or the sub- solar cell piece by described full wafer cell piece etc. point cutting acquisition.
4. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that the through hole
Shape be it is round, rectangular or oval.
5. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that the overlay region
The width in domain is 0.1-3mm.
6. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that further include,
Making herbs into wool, diffusion, doping, polishing, deposition passivating film, aperture are carried out to silicon wafer, obtain the back contacts solar cell piece.
7. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that the anode
Presoma, the cathode presoma and the perforated electrodes presoma before sinter molding, further include together,
The coating inorganic bonding agent between the through hole or around the through hole, wherein the inorganic adhesive position
In the overlapping region, the inorganic adhesive is located between the adjacent two pieces back contacts solar cell pieces.
8. the manufacturing method of back contacts lamination solar battery string according to claim 1, which is characterized in that the through hole
It is formed by laser boring mode.
9. a kind of back contacts lamination solar battery string, which is characterized in that by the described in any item back contacts laminations of claim 1-8
The manufacturing method of solar battery string obtains.
10. a kind of back contacts lamination solar module, which is characterized in that multiple as claimed in claim 9 including electrical connection
Back contacts lamination solar battery string.
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| CN201910465318.XA CN110323300B (en) | 2019-05-30 | 2019-05-30 | Back contact laminated solar cell string, manufacturing method thereof and laminated solar cell assembly |
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| CN201910465318.XA CN110323300B (en) | 2019-05-30 | 2019-05-30 | Back contact laminated solar cell string, manufacturing method thereof and laminated solar cell assembly |
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| CN110323300A true CN110323300A (en) | 2019-10-11 |
| CN110323300B CN110323300B (en) | 2022-03-08 |
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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 |
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| CN110323300B (en) | 2022-03-08 |
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