CN208674136U - The two-sided direct-connected solar cell module of fragment perforation - Google Patents
The two-sided direct-connected solar cell module of fragment perforation Download PDFInfo
- Publication number
- CN208674136U CN208674136U CN201821251934.2U CN201821251934U CN208674136U CN 208674136 U CN208674136 U CN 208674136U CN 201821251934 U CN201821251934 U CN 201821251934U CN 208674136 U CN208674136 U CN 208674136U
- Authority
- CN
- China
- Prior art keywords
- solar battery
- battery sheet
- contact
- main grid
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The utility model discloses a kind of two-sided direct-connected solar cell modules of fragment perforation, including solar battery sheet, to pass through pretreated 1/2 or 1/4 silicon wafer；The solar battery sheet includes the first solar battery sheet, and the first front electrode, the first rear electrode are equipped with lateral main grid and longitudinal secondary grid, and at least one of first front electrode, first rear electrode are equipped with contact；Longitudinal secondary grid bearing where the contact is equipped with through hole, and through hole is surrounded by isolation strip；The long side of adjacent solar battery sheet is overlapped, and forms face contact；Adjacent solar battery sheet is connected by common contact, main grid paste then is perfused to through hole, and form battery strings by sintering.Using the utility model, structure is simple, and gap is small between cell piece, reduces welding loss, and component internal loss is few, and the high reliablity of battery component, and photoelectric conversion efficiency is high.
Description
Technical field
The utility model relates to area of solar cell more particularly to a kind of two-sided direct-connected solar battery groups of fragment perforation
Part.
Background technique
Conventional crystalline silicon component cell piece all uses metal welding band connection substantially.There are three obvious for this connection type
Defect: first is that metal welding band and cell piece gap occupy the positive light-receiving area of component；Second is that there are line losses for metal welding band；Third is that
Welding is expanded with heat and contract with cold by the temperature change period is easy to happen fracture and corrosion, these three modes are to the transfer efficiency of component and property
Stabilizability has large effect.
Utility model content
Technical problem to be solved by the utility model is to provide a kind of two-sided direct-connected solar battery groups of fragment perforation
Part, structure is simple, and gap is small between cell piece, reduces welding loss, and component internal loss is few, and the high reliablity of battery component,
Photoelectric conversion efficiency is high.
In order to solve the above-mentioned technical problem, the utility model provides a kind of two-sided direct-connected solar battery group of fragment perforation
Part, including at least two solar battery sheets, the solar battery sheet stack gradually arrangement, form battery strings, wherein described
Solar battery sheet is 1/2 or 1/4 silicon wafer；The solar battery sheet includes at least the first solar battery sheet；
First solar battery sheet include the first front electrode and the first rear electrode, first front electrode,
First rear electrode is equipped with lateral main grid and longitudinal secondary grid, in first front electrode, the first rear electrode at least it
One is equipped with contact, and the contact is set to the end of lateral main grid；
Longitudinal secondary grid bearing where the contact is equipped with through hole, and through hole breaks longitudinal secondary barrier, and described first
Solar battery sheet is surrounded by isolation strip along the through hole；
The long side of adjacent solar battery sheet is overlapped, and forms face contact；
Adjacent solar battery sheet is connected by common contact, main grid paste then is perfused to through hole, and pass through burning
Knot forms battery strings.
As the preferred embodiment of above scheme, the solar battery sheet is to pass through pretreated 1/2 or 1/4 silicon wafer,
It is described pretreatment successively include: 1/2 or 1/4 silicon wafer the positive back side formed flannelette, diffuse to form PN junction, doping, polished backside,
Positive backside deposition passivating film, back side fluting.
As the preferred embodiment of above scheme, the front electrode of first solar battery sheet is equipped with contact, described
Contact is set to the end of lateral front main grid, and the through hole is set on longitudinal secondary grid on contact or where contact, and described the
The back side of one solar battery sheet is surrounded by isolation strip along the through hole；
The contact of the front electrode of each solar battery sheet is set to the back side of preceding a piece of solar battery sheet, and preceding a piece of
The lateral back side main grid of solar battery sheet connects.
As the preferred embodiment of above scheme, the contact is circular contact, rectangular contacts, regular polygon contact or linear
Contact.
As the preferred embodiment of above scheme, the solar battery sheet further includes the second solar battery sheet, and second too
Positive energy cell piece includes the second front electrode and the second rear electrode, and second front electrode, the second rear electrode are equipped with
Lateral main grid, at least one of second front electrode, second rear electrode are equipped with longitudinal main grid, the longitudinal direction main grid with
Lateral main grid connection.
As the preferred embodiment of above scheme, the solar battery sheet includes the second solar battery sheet A, second sun
It can cell piece B and the first solar battery sheet；
The front electrode of the second solar battery sheet A include a plurality of lateral front main grid, 1 longitudinal front main grid and
The a plurality of secondary grid in longitudinal front, rear electrode includes a plurality of lateral back side main grid and a plurality of back side pair grid；
The front electrode of the second solar battery sheet B includes that a plurality of lateral front main grid and a plurality of longitudinal front are secondary
The end of grid, the transverse direction front main grid is equipped with contact, and longitudinal secondary grid bearing where the contact is equipped with through hole, the back side
Electrode includes a plurality of lateral back side main grid, 1 longitudinal back side main grid and a plurality of back side pair grid；
The front electrode of first solar battery sheet includes a plurality of lateral front main grid, is set to lateral front main grid end
The contact in portion and a plurality of secondary grid in longitudinal front, longitudinal secondary grid bearing where the contact are equipped with through hole, rear electrode packet
Include a plurality of lateral back side main grid and a plurality of back side pair grid；
Second solar battery sheet A, the first solar battery sheet, the second solar battery sheet B stack gradually connection.
As the preferred embodiment of above scheme, the width of the contact is at least bigger by 20% than the width of lateral main grid.
The area of the overlapping region of adjacent solar battery sheet is the 0.5-20% of monolithic solar cell piece area.
Implement the utility model, has the following beneficial effects:
The utility model provides a kind of two-sided direct-connected solar cell module of fragment perforation, including at least two solar-electricities
Pond piece, the solar battery sheet are to pass through pretreated 1/2 or 1/4 silicon wafer, the long side weight of adjacent solar battery sheet
It is folded, form face contact；And adjacent solar battery sheet is connected by common contact, and main grid paste then is perfused to through hole,
And battery strings are formed by sintering, it has the advantage that
1, it is all connected by welding between the cell piece of traditional components, the solar-electricity inside the battery strings of the utility model
The positive and negative anodes of adjacent cell piece are connected directly by common contact and perforation slurry between the piece of pond, drastically reduce welding
Dosage, it is also very close to each other between cell piece, area workable for assembly surface is taken full advantage of, the line of conventional metals welding is reduced
Damage, therefore greatly improve the transfer efficiency of component；
2, traditional metal welding band connection mode is line connection, and the utility model component is then face connection, is effectively promoted
Attachment force between cell piece, keeps the component more reliable；
3, it is connected between the adjacent fragment of the utility model by common contact, replaces the welding connection between conventional fragment,
The manufacturing process of double-side assembly is enormously simplified, equipment cost and production cost are reduced；
4, it is connected between the adjacent fragment of the utility model by common contact, compared with the mode of conductive glue connection, is reduced
Series resistance and resistance loss, are obviously improved the power of double-side assembly；
5, connection of the utility model between adjacent fragment, which is used, is perfused main grid paste to through hole, further increases
The stability of connection, reduces series resistance and resistance loss, and the conducting power of strengthening electric current is obviously improved the function of double-side assembly
Rate；
6, common contact between the adjacent fragment of the utility model can form battery strings by sintering, i.e., battery strings
Preparation process incorporate in conventional solar cells manufacturing process, further decrease gap between cell piece, reduce welding loss；
7, the process flow of the utility model is relatively simple, and each processing step is all more mature, and incorporates commonly too
In positive energy battery manufacturing process, the probability to malfunction in manufacturing process is reduced, the reliability of product is increased.
8, the utility model solar battery sheet is to pass through pretreated 1/2 or 1/4 silicon wafer (i.e. fragment), with full wafer silicon
Piece is compared, and the electric current passed through on fragment is less than the electric current of full wafer, reduces the internal resistance loss inside battery component, lifting assembly
Power；And compared with the fragment of common imbrication component, the area of the utility model solar battery sheet is larger, avoids stacking number
Measure the problems such as excessive bring is at high cost, stability is poor.
Detailed description of the invention
Fig. 1 is the segmentation schematic diagram of the Facad structure of the first solar battery sheet of the utility model；
Fig. 2 is the segmentation schematic diagram of the backside structure of the first solar battery sheet of the utility model；
Fig. 3 is the positive partial enlarged view of through hole shown in Fig. 1；
Fig. 4 is the partial enlarged view at the back side of through hole shown in Fig. 2；
Fig. 5 is schematic diagram of the utility model component first embodiment in lamination process；
Fig. 6 is the positive structure schematic of the utility model component first embodiment；
Fig. 7 is the structure schematic diagram of the utility model component first embodiment；
Fig. 8 is the sectional view of component shown in Fig. 5；
Fig. 9 is the segmentation schematic diagram of the Facad structure of the second solar battery sheet of the utility model A；
Figure 10 is the segmentation schematic diagram of the backside structure of the second solar battery sheet of the utility model A；
Figure 11 is the segmentation schematic diagram of the Facad structure of the second solar battery sheet of the utility model B；
Figure 12 is the segmentation schematic diagram of the backside structure of the second solar battery sheet of the utility model B；
Figure 13 is the positive partial enlarged view of through hole shown in Figure 11；
Figure 14 is the partial enlarged view at the back side of through hole shown in Figure 12；
Figure 15 is schematic diagram of the utility model component second embodiment in lamination process；
Figure 16 is the positive structure schematic of the utility model component second embodiment；
Figure 17 is the structure schematic diagram of the utility model component second embodiment；
Figure 18 is the sectional view of the utility model component second embodiment；
Figure 19 is the flow chart of the preparation method of the two-sided direct-connected solar cell module of the utility model fragment perforation；
Figure 20 is the flow chart of another preparation method of the two-sided direct-connected solar cell module of the utility model fragment perforation.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type is described in further detail.
The utility model provides a kind of two-sided direct-connected solar cell module of fragment perforation comprising at least two sun
Energy cell piece, the solar battery sheet stack gradually arrangement, form battery strings.The solar battery sheet is 1/2 or 1/4 silicon
Piece (i.e. fragment), compared with full wafer silicon wafer, the electric current passed through on fragment is less than the electric current of full wafer, reduces inside battery component
Internal resistance loss, the power of lifting assembly；And compared with the fragment of common imbrication component, the utility model solar battery sheet
Area is larger, avoids the problems such as stacking excessive bring of quantity is at high cost, stability is poor.
It is below practical by being illustrated in conjunction with Fig. 1-14 for pretreated 1/4 silicon wafer by solar battery sheet
Novel, the solar battery sheet includes at least the first solar battery sheet.
As shown in Figure 1, 2, the first solar battery sheet 1A is to pass through pretreated 1/4 silicon wafer, and each first too
Positive energy cell piece 1A includes the first front electrode and the first rear electrode, and first front electrode, the first rear electrode are all provided with
There are lateral main grid and longitudinal secondary grid, at least one of first front electrode, first rear electrode are equipped with contact, the touching
Point is set to the end of lateral main grid.
Specifically, there are many embodiments for the electrode of shown first solar battery sheet, comprising:
(1) front electrode of the first solar battery sheet 1A includes a plurality of lateral front main grid 11, is set to laterally just
The contact 111 of 11 end of face main grid and a plurality of secondary grid 13 in longitudinal front；Rear electrode includes a plurality of lateral back side main grid 14 and more
Back side pair grid 16, Fig. 1, embodiment belongs to situation in (1) shown in 2.
(2) front electrode of first solar battery sheet includes that a plurality of lateral front main grid and a plurality of longitudinal front are secondary
Grid；Rear electrode includes a plurality of lateral back side main grid, the contact set on lateral back side main grid end and a plurality of back side pair grid；
(3) front electrode of first solar battery sheet includes a plurality of lateral front main grid, is set to laterally front master
The contact in grid end portion and a plurality of secondary grid in longitudinal front；Rear electrode includes a plurality of lateral back side main grid, is set to lateral back side main grid
The contact of end and a plurality of back side pair grid.
That is, the first front electrode is equipped with contact, perhaps the first rear electrode is equipped with contact or the first front electrode, the
One rear electrode is equipped with contact.
Preferably, the contact 111 is circular contact, rectangular contacts, regular polygon contact or linear contact.It is described linear
Contact may include the linear of variform, such as straight line, curve, camber line etc..
It should be noted that the contact may be arranged as other shapes, such as diamond shape in addition to above-mentioned shape, half
Circle or other irregular shapes, embodiment are not limited to the utility model illustrated embodiment.
It should be noted that the main grid of the utility model and secondary grid can be the forms such as straight line, segmentation, curve, laser is cut
Secant is also possible to straight line or curve, and is not limited thereto.It, can be with moreover, the utility model is other than main grid, secondary grid
Equipped with spine, the embodiment multiplicity of the solar cell module, the utility model embodiment is not limited to lift real
Apply example.
In the present embodiment, longitudinal secondary grid bearing where the contact is equipped with through hole 2, and through hole 2 will be longitudinal secondary
Barrier is disconnected, and any position on longitudinal secondary grid bearing where contact 111, including contact 111 can be set in through hole 2, with
And on longitudinal secondary grid where contact 111.
As shown in Figure 3,4, first solar battery sheet is surrounded by isolation strip 3 along the through hole 2.
Isolation strip 3 is used to disconnect the conducting relationship of slurry and front electrode and/or rear electrode in through hole 2, avoids
Positive and negative anodes inside cell piece lead to short circuit.Specific isolation setting should regard the solar battery sheet and not of different structure
Depending on same application.In the present embodiment, the back side of first solar battery sheet along the through hole surrounding
Equipped with isolation strip.
As shown in figure 5, the utility model is during being laminated arrangement, adjacent solar battery sheet 1 passes through common contact
111 connections, the contact 111 of the front electrode of each solar battery sheet 1 are set to the back side of preceding a piece of solar battery sheet 1, with
The lateral back side main grid 14 of preceding a piece of solar battery sheet 1 connects.
Solar battery sheet is connected by the way of the stacking of front and back inside the utility model battery strings, and surface does not have metal welding
Band, it is also very close to each other between cell piece, area workable for assembly surface is taken full advantage of, the line loss of conventional metals welding is reduced,
Therefore the transfer efficiency of component is greatly improved；
Traditional metal welding band connection mode is line connection, and the utility model component is then face connection, is effectively improved
Attachment force between cell piece keeps component more reliable.
As shown in Fig. 6, Fig. 7, Fig. 8, the long side of adjacent solar battery sheet 1 is overlapped, and forms face contact 20；It is adjacent too
Positive energy cell piece 1 is connected by common contact 111, main grid paste then is perfused to through hole 2, and form battery strings by sintering
10。
The full wafer silicon wafer of the industry, general length and width are equal, and size is mostly 156 ± 2mm, and the utility model uses 1/2 or 1/4
Silicon wafer stacking, simple and convenient, high production efficiency.
It is connected between the adjacent fragment of the utility model by common contact, replaces the welding connection between conventional fragment, no
It needs to be sliced, and saves the connection of welding, enormously simplify the manufacturing process of double-side assembly, reduce equipment cost and be produced into
This.
It is connected between the adjacent fragment of the utility model by common contact, compared with the mode of conductive glue connection, is reduced
Series resistance and resistance loss are obviously improved the power of double-side assembly.
Common contact between the adjacent fragment of the utility model can form battery strings by sintering, i.e., battery strings
Preparation process incorporates in conventional solar cells manufacturing process, and gap is small between further cell piece, reduces welding loss.
Connection of the utility model between adjacent full wafer, which is used, is perfused main grid paste, the company of further increasing to through hole
The stability connect, reduces series resistance and resistance loss, and the conducting power of strengthening electric current is obviously improved the function of double-side assembly
Rate.
The battery strings 10 of the utility model can be set to a row or multi-row battery strings, the solar-electricity of every row's battery strings 10
Pass through series connection between pond piece 1.And when battery strings 10 are set as multiple rows of, the solar battery sheets 1 of single battery strings 10 it
Between pass through series connection；Pass through the connection of in parallel or other modes, connection type multiplicity, this reality between difference row's battery strings 10
It is defined with novel not to this.Preferably, longitudinal main grid is connected by welding in parallel or series between different row's battery strings 10
Or lateral main grid, connection is simple, highly reliable.
As shown in Fig. 9 to 15, the utility model additionally provides the second of the two-sided direct-connected solar cell module of fragment perforation
Embodiment, further includes second solar battery sheet at this time, and second solar battery sheet is to pass through pretreated 1/4
Silicon wafer；
As shown in Fig. 9 and Figure 10, Figure 11 and Figure 12, second solar battery sheet includes the second front electrode and second
Rear electrode, second front electrode, the second rear electrode are equipped with lateral main grid, second front electrode, the second back
At least one of face electrode is equipped with longitudinal main grid, and the longitudinal direction main grid is connect with lateral main grid.
Specifically, there are many embodiments for the electrode of shown second solar battery sheet, comprising:
(1) as shown in Figure 9 and Figure 10, the second solar battery sheet 1B is to pass through pretreated 1/4 silicon wafer, described
The front electrode of second solar battery sheet 1B includes the longitudinal front main grids 12 of a plurality of lateral front main grid 11,1 and a plurality of vertical
To positive secondary grid 13, rear electrode includes a plurality of lateral back side main grid 14 and a plurality of back side pair grid 16, is named as the second solar energy
Cell piece A；
(2) as is illustrated by figs. 11 and 12, the second solar battery sheet 1C is to pass through pretreated 1/4 silicon wafer, institute
The front electrode for stating the second solar battery sheet 1C includes the positive secondary grid 13 of a plurality of lateral front main grid 11 and a plurality of longitudinal direction, described
The end of lateral front main grid 11 is equipped with contact 111, and longitudinal secondary grid bearing where the contact 111 is equipped with through hole 2, back
Face electrode includes a plurality of 14,1 longitudinal back side main grids 15 of lateral back side main grid and a plurality of back side pair grid 16, is named as second sun
It can cell piece B.
It should be noted that the surrounding of the through hole 2 is additionally provided with isolation strip 3, as shown in Figure 13 and Figure 14, second
Isolation strip 3 is arranged along the surrounding of through hole 2 in the back side of solar battery sheet B, setting principle with the first solar battery,
This is repeated no more.
As shown in figures 15-18, the battery strings 10 of the utility model can be set to a row or multi-row battery strings, every row's battery
String includes a second solar battery sheet 1B, the first solar battery sheet 1A of one or more and second solar battery
Piece 1C, the second solar battery sheet 1B, the first solar battery sheet 1A, the second solar battery sheet 1C stack gradually connection.The
Two solar battery sheet 1B, the second solar battery sheet 1C longitudinal main grid be used as battery strings positive and negative anodes.
During arrangement is laminated, adjacent solar battery sheet 1 is connected the utility model by common contact 111, often
The contact 111 of the front electrode of one solar battery sheet 1 is set to the back side of preceding a piece of solar battery sheet 1, with the preceding a piece of sun
Lateral back side main grid 14 connection of energy cell piece 1.The long side of adjacent solar battery sheet 1 is overlapped, and forms face contact 20；It is adjacent
Solar battery sheet 1 connected by common contact 111, main grid paste then is perfused to through hole 2, and electricity is formed by sintering
Pond string 10.
Pass through series connection between the solar battery sheet 1 of every row's battery strings 10.And when battery strings 10 are set as multiple rows of,
Pass through series connection between the solar battery sheet 1 of single battery strings 10；Between difference row's battery strings 10 by it is in parallel or its
He connects mode, and connection type multiplicity, the utility model is defined not to this.Preferably, between different row's battery strings 10
Connect longitudinal main grid or lateral main grid in parallel or series by welding, connection is simple, highly reliable.
Further, the difference embodiment in conjunction with shown in Fig. 1-18, the solar battery sheet 1 is by pretreated
1/2 or 1/4 silicon wafer.It is described pretreatment successively include: 1/2 or 1/4 silicon wafer the positive back side formed flannelette, diffuse to form PN junction,
Doping, polished backside, positive backside deposition passivating film, back side fluting.
The utility model incorporates the preparation process of battery strings in conventional solar cells manufacturing process, in regular solar
The lamination that battery strings can be completed before the sintering step of battery, finally by once sintered, so that it may realize battery strings
It connects, gap is small between further cell piece, reduces welding loss.
The process flow of the utility model is relatively simple, and each processing step is all more mature, and incorporates the common sun
In energy battery manufacturing process, the probability to malfunction in manufacturing process is reduced, the reliability of product is increased.
Preferably, the width of the contact 111 is at least bigger by 20% than the width of lateral main grid.When the width of the contact 111
When degree bigger than the width of lateral main grid 20%, it is ensured that adjacent solar battery sheet passes through the connected stabilization of lateral main grid
Property, reduce series resistance and resistance loss.When the width of contact 111 greatly to certain proportion when, contact 111 and contact 111 it
Between be connected, form a longitudinal main grid.
More preferably, the width of the contact 111 is 20-50% bigger than the width of lateral main grid, it is ensured that the adjacent sun
Energy cell piece 1 passes through the connected stability of lateral main grid, reduces series resistance and resistance loss, is obviously improved the function of component
Rate.Moreover, it is also possible to simplify the difficulty of preparation process, the slurry of overlapping region is saved, is made with the implementation of lower cost.Work as contact
Width 20-50% bigger than the width of lateral main grid when, series resistance and resistance loss can be in the utility model base cases
Under the premise of, additionally reduce by 25%.
The area of the overlapping region of adjacent solar battery sheet is monolithic solar cell piece area
0.5-20%.It can guarantee the stability that the adjacent solar battery sheet is connected by contact, reduce string
Join resistance and resistance loss, is obviously improved the power of component.
Correspondingly, a kind of preparation method of two-sided direct-connected solar cell module of fragment perforation is also disclosed in the utility model,
As shown in figure 19, comprising:
S101, silicon wafer is pre-processed, and prints front electrode and rear electrode in silicon chip surface.
Specifically, printing front electrode and rear electrode in silicon wafer according to the design of electrode.In print order side
Face, first in silicon chip surface printed back electrode, drying republishes front electrode, slurry when can fold in this way to avoid silicon wafer layer
Adhesion.
S102, full wafer silicon wafer is cut into 1/2 or 1/4, obtains solar battery sheet.
S103, solar battery sheet is punched.
It should be noted that punching can also be in the either step before stacking arrangement.
S104, solar battery sheet is laminated to arrangement one by one, adjacent solar battery sheet is connected by contact, forms electricity
Pond string.
S105, main grid paste is perfused to through hole, and dried；
S106, high temperature sintering is carried out to battery strings, makes slurry curing；
S107, as needed to around through hole carry out laser isolation；
S108, battery strings are carried out with anti-LID annealing, after stepping test, is packaged into component.
It should be noted that anti-LID annealing just refers to anti-photoluminescence decaying annealing.
After stepping test, by the cell package of identical gear to the same component, guarantee component Maximum Power Output and
Guarantee the stability of power output.
Correspondingly, the preparation side of the two-sided direct-connected solar cell module of another fragment perforation is also disclosed in the utility model
Method, as shown in figure 16, comprising:
S201, silicon wafer is pre-processed, then full wafer silicon wafer is cut into 1/2 or 1/4, obtain solar battery sheet；
S202, in solar battery sheet surface printing front electrode and rear electrode；
S203, solar battery sheet is punched；
It should be noted that punching can also be in the either step before stacking arrangement.
S204, solar battery sheet is laminated to arrangement one by one, adjacent solar battery sheet is connected by contact, forms electricity
Pond string；
S205, main grid paste is perfused to through hole, and dried；
S206, high temperature sintering is carried out to battery strings, makes slurry curing.
S207, as needed to around through hole carry out laser isolation；
S208, battery strings are carried out with anti-LID annealing, after stepping test, is packaged into component.
Further, described pre-process includes:
(1.1) flannelette is formed in front side of silicon wafer and the back side；
The silicon wafer can select P-type silicon or N-type silicon.
(1.2) high square resistance diffusion is carried out in front side of silicon wafer, forms PN junction；
Sheet resistance is generally preferred to 80-200 Ω/, but not limited to this.
(1.3) selective laser doping is carried out to front side of silicon wafer；
Laser doping pattern needs are corresponding with subsequent front electrode pair gate pattern, use prior art design i.e.
It can.
(1.4) by-product and periphery P N knot that removal diffusion process is formed, and silicon chip back side is polished；
N-type silicon is formed in front side of silicon wafer according to phosphorus diffusion, by-product is phosphorosilicate glass；
Front side of silicon wafer is diffused according to boron and forms P-type silicon, and by-product is Pyrex.
(1.5) passivating film and protective film are deposited in silicon chip back side；
The passivating film is preferably silicon dioxide film, di-aluminium trioxide film or silicon nitride film, and protective film preferably nitrogenizes
Silicon fiml, silicon oxynitride film, silicon dioxide film or the composite membrane being made of above-mentioned film, but not limited to this.
(1.6) passivating film and antireflective film are deposited in front side of silicon wafer；
The passivating film is preferably silicon dioxide film, di-aluminium trioxide film or silicon nitride film；The antireflective film is preferably nitrogen
SiClx film or silicon dioxide film, but not limited to this.
(1.7) laser slotting is carried out to the passivating film of silicon chip back side and protective film.
Laser slotting pattern is corresponding with subsequent back side pair grid line pattern, generally linear type or line segment type.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model rather than to this realities
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is common
It will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this reality
With the spirit and scope of new technique scheme.
Claims (8)
1. a kind of two-sided direct-connected solar cell module of fragment perforation, including at least two solar battery sheets, the solar energy
Cell piece stacks gradually arrangement, forms battery strings, which is characterized in that the solar battery sheet is 1/2 or 1/4 silicon wafer；
The solar battery sheet includes the first solar battery sheet；
First solar battery sheet includes the first front electrode and the first rear electrode, first front electrode, first
Rear electrode is equipped with lateral main grid and longitudinal secondary grid, and at least one of first front electrode, first rear electrode are set
There is contact, the contact is set to the end of lateral main grid；
Longitudinal secondary grid bearing where the contact is equipped with through hole, and through hole breaks longitudinal secondary barrier, first sun
Energy cell piece is surrounded by isolation strip along the through hole；
The long side of adjacent solar battery sheet is overlapped, and forms face contact；
Adjacent solar battery sheet is connected by common contact, main grid paste then is perfused to through hole, and pass through sintering shape
At battery strings.
2. the two-sided direct-connected solar cell module of fragment perforation as described in claim 1, which is characterized in that the solar battery
Piece is to pass through pretreated 1/2 or 1/4 silicon wafer, and the pretreatment successively includes: to be formed at the positive back side of 1/2 or 1/4 silicon wafer
Flannelette diffuses to form PN junction, doping, polished backside, positive backside deposition passivating film, back side fluting.
3. the two-sided direct-connected solar cell module of fragment perforation as claimed in claim 1 or 2, which is characterized in that described first too
The front electrode of positive energy cell piece is equipped with contact, and the contact is set to the end of lateral front main grid, and the through hole is set to
On longitudinal secondary grid on contact or where contact, the back side of first solar battery sheet is set along the surrounding of the through hole
There is isolation strip；
The contact of the front electrode of each solar battery sheet is set to the back side of preceding a piece of solar battery sheet, with the preceding a piece of sun
The lateral back side main grid connection of energy cell piece.
4. the two-sided direct-connected solar cell module of fragment perforation as claimed in claim 3, which is characterized in that the contact is circle
Contact, rectangular contacts, regular polygon contact or linear contact.
5. the two-sided direct-connected solar cell module of fragment perforation as described in claim 1, which is characterized in that the solar battery
Piece further includes the second solar battery sheet, and the second solar battery sheet includes the second front electrode and the second rear electrode, described
Second front electrode, the second rear electrode are equipped with lateral main grid, in second front electrode, the second rear electrode at least
One of be equipped with longitudinal main grid, the longitudinal direction main grid is connect with transverse direction main grid.
6. the two-sided direct-connected solar cell module of fragment perforation as claimed in claim 5, which is characterized in that the solar battery
Piece includes the second solar battery sheet A, the second solar battery sheet B and the first solar battery sheet；
The front electrode of the second solar battery sheet A includes a plurality of lateral front main grid, 1 longitudinal front main grid and a plurality of
Longitudinal secondary grid in front, rear electrode includes a plurality of lateral back side main grid and a plurality of back side pair grid；
The front electrode of the second solar battery sheet B includes a plurality of lateral front main grid and a plurality of secondary grid in longitudinal front, institute
The end for stating lateral front main grid is equipped with contact, and longitudinal secondary grid bearing where the contact is equipped with through hole, rear electrode
Including a plurality of lateral back side main grid, 1 longitudinal back side main grid and a plurality of back side pair grid；
The front electrode of first solar battery sheet includes a plurality of lateral front main grid, set on lateral front main grid end
Contact and a plurality of secondary grid in longitudinal front, longitudinal secondary grid bearing where the contact are equipped with through hole, and rear electrode includes more
Item transverse direction back side main grid and a plurality of back side pair grid；
Second solar battery sheet A, the first solar battery sheet, the second solar battery sheet B stack gradually connection.
7. the two-sided direct-connected solar cell module of fragment perforation as described in claim 1, which is characterized in that the width of the contact
It is at least bigger by 20% than the width of lateral main grid.
8. the two-sided direct-connected solar cell module of fragment perforation as described in claim 1, which is characterized in that adjacent solar-electricity
The area of the overlapping region of pond piece is the 0.5-20% of monolithic solar cell piece area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821251934.2U CN208674136U (en) | 2018-08-03 | 2018-08-03 | The two-sided direct-connected solar cell module of fragment perforation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821251934.2U CN208674136U (en) | 2018-08-03 | 2018-08-03 | The two-sided direct-connected solar cell module of fragment perforation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208674136U true CN208674136U (en) | 2019-03-29 |
Family
ID=65832506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821251934.2U Active CN208674136U (en) | 2018-08-03 | 2018-08-03 | The two-sided direct-connected solar cell module of fragment perforation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208674136U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037364A (en) * | 2018-08-03 | 2018-12-18 | 浙江爱旭太阳能科技有限公司 | The two-sided direct-connected solar cell module of fragment perforation and preparation method |
| CN115832075A (en) * | 2022-12-28 | 2023-03-21 | 通威太阳能（成都）有限公司 | Solar cell small piece for preparing laminated assembly, solar cell piece, solar cell string and laminated assembly |
-
2018
- 2018-08-03 CN CN201821251934.2U patent/CN208674136U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037364A (en) * | 2018-08-03 | 2018-12-18 | 浙江爱旭太阳能科技有限公司 | The two-sided direct-connected solar cell module of fragment perforation and preparation method |
| CN115832075A (en) * | 2022-12-28 | 2023-03-21 | 通威太阳能（成都）有限公司 | Solar cell small piece for preparing laminated assembly, solar cell piece, solar cell string and laminated assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108987509A (en) | Two-sided imbrication solar cell module and preparation method | |
| CN108922929A (en) | The two-sided imbrication solar cell module of perforation and preparation method | |
| CN108987516A (en) | Latticed two-sided direct-connected solar cell module and preparation method | |
| CN109216478A (en) | Single side imbrication solar cell module and preparation method | |
| US20160351741A1 (en) | High-Efficiency N-Type Bifacial Solar Cell | |
| CN110112231A (en) | A kind of solar energy imbrication battery component and preparation method thereof | |
| CN102938432A (en) | Manufacture method of metal wrap through (MWT) solar cell module | |
| CN110459638A (en) | A kind of IBC battery and preparation method thereof of Topcon passivation | |
| CN208674136U (en) | The two-sided direct-connected solar cell module of fragment perforation | |
| CN108922934B (en) | Double-sided direct-connection solar cell module and preparation method thereof | |
| CN108987510A (en) | The direct-connected solar cell module of latticed single side and preparation method | |
| CN109326664A (en) | The direct-connected solar cell module of single side and preparation method | |
| CN105702755B (en) | A kind of front electrode of crystal silicon solar batteries | |
| CN209708987U (en) | Single side imbrication solar cell module | |
| CN109037364A (en) | The two-sided direct-connected solar cell module of fragment perforation and preparation method | |
| CN108987507A (en) | The direct-connected solar cell module of fragment single side and preparation method | |
| CN109244160A (en) | The direct-connected solar cell module of fragment single side and preparation method | |
| CN208674135U (en) | The two-sided direct-connected solar cell module of fragment | |
| CN208674134U (en) | The two-sided direct-connected solar cell module of fragment | |
| CN209641666U (en) | The direct-connected solar cell module of fragment single side | |
| CN109037365A (en) | Perforation single side imbrication solar cell module and preparation method | |
| CN209708986U (en) | The two-sided imbrication solar cell module of perforation | |
| CN208753350U (en) | Latticed two-sided direct-connected solar cell module | |
| CN209641662U (en) | Perforation single side imbrication solar cell module | |
| CN208753341U (en) | The latticed direct-connected solar cell module of single side |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |