CN107863396A - A kind of back-contact solar module and preparation method - Google Patents
A kind of back-contact solar module and preparation method Download PDFInfo
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- CN107863396A CN107863396A CN201711062891.3A CN201711062891A CN107863396A CN 107863396 A CN107863396 A CN 107863396A CN 201711062891 A CN201711062891 A CN 201711062891A CN 107863396 A CN107863396 A CN 107863396A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000006071 cream Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims 1
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 235000012431 wafers Nutrition 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 239000011521 glass Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- 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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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of back-contact solar module and preparation method, back-contact solar cell has special symmetrical structure, it is divided into several individually small blade units, the positive and negative minimum distance straight line interconnection in the adjacent cell piece back side can be simply carried out very much and electrode converging point is distributed in small blade unit both sides, when being prepared into component.The operating current of small blade unit is much smaller than normal piece, the internal resistance power attenuation of cell piece interconnection greatly reduces, so ultra-thin and small cross-sectional area interconnecting strip can be selected again, with reference to shorter interconnection distance, it is expected that interconnecting strip consumption more than 90% can be reduced, cost is both significantly reduced, while also because ultra-thin interconnecting strip reduces the stress to cell piece, make its encapsulation more suitable for slimline battery piece, have greatly to drop originally to carry and imitate space.
Description
Technical field
The present invention relates to a kind of structure and manufacturing technology of novel photovoltaic solar module, applied to solar module
The manufacturing.
Background technology
In today of photovoltaic industry high speed development, efficient solar battery component receives more and more attention, wherein the back of the body connects
Touch solar cell and component are a Typical Representatives of high-efficiency photovoltaic product, because its front is without metal grid lines, (back of the body connects IBC entirely
Touch battery) or without metal primary line (MWT metal piercings wind battery), effectively eliminate or reduce the front screening of metal grid lines
Light, the utilization rate of incident light is improved so as to reach the purpose of lifting product photoelectric transformation efficiency.But back-contact battery so far
And component industrialization is not smooth, main cause is a lack of easy and effective and inexpensive component package mode, than more typical
Component package mode is with welding combination busbar series cells (number of patent application 201110140708.3) and based on metal
The packaged type (number of patent application 201310215117.7) of circuit board, the cell piece and interconnection architecture of described two modes and
Assembling is all more complicated, and needs to consume substantial amounts of metal interconnection material to reduce power loss caused by interconnection string hinders, and enters one again
Step improves the material cost of encapsulation, so back-contact solar module technology is developed so far, industry be badly in need of it is a kind of it is low into
Originally the solution and easily realized.
It is an object of the invention to provide the structure and preparation method of a kind of new back-contact battery and component, simplifies
Preparation method and it can be greatly reduced production needs of the production cost so as to fit scale.
The content of the invention
Goal of the invention：For problems of the prior art and deficiency, the present invention provides a kind of lower cost, is easy to real
Existing back-contact battery module structure and preparation method.The present invention has fully used the ripe industrial technology of in the market, used
The cost of material is low, and processing step is also relatively simple, convenient to carry out, also is adapted for carrying out large-scale production manufacture.
Technical scheme：A kind of back-contact solar module, back-contact solar cell are provided with the scribing position line, edge
Back-contact solar cell can be divided into several identical burst battery units by the scribing position line, each burst battery unit
Two long sides are respectively equipped with a row positive electrode point and a row negative electrode point, and positive electrode point and negative electrode point are on burst battery unit
Axial symmetry；The adjacent positive electrode point of two adjacent burst battery units and negative electrode point are symmetrical on the burst scribing position line；
When interconnection package is into component, adjacent burst battery unit need to be only located to the adjacent each pair positive electrode of scribing position line both sides
Point and negative electrode point difference straight line interconnection bunchiness, the burst battery unit for interconnecting bunchiness carry out connection in series-parallel setting to be formed again
Complete assembly circuit, the assembly circuit after the processes such as follow-up existing lamination, attaching line box by being made the complete sun
Battery component finished product.
A kind of preparation method of back-contact solar module, comprises the following steps：
(1) the scribing position between burst battery unit and burst battery unit is made on back-contact solar cell
Line, make a row positive electrode point and a row negative electrode point, positive electrode point respectively on two long sides of each burst battery unit
With negative electrode point on burst battery unit axial symmetry；The adjacent positive electrode point of two adjacent burst battery units and negative electrode
The point burst scribing position line is symmetrical；
(2) scribing is carried out along the scribing position line using modes such as laser, plasma or machineries, large stretch of cell piece is drawn
Into several identical burst battery units；
(3) when burst battery unit being assembled into component, by adjacent burst battery unit order marshalling, with interconnection
Bar connects the positive and negative electrode point between adjacent burst battery unit respectively, and interconnecting strip can be welding or other metals
Thin slice, the forms such as welding or conductive adhesive can be used during interconnection, interconnect the burst battery unit quantity of bunchiness typically 2~
500, the interconnection burst battery unit of bunchiness can further carry out parallel connection to improve operating current, typically can parallel connection 2~10 go here and there,
As needed, it is suitable to obtain can also further to connect other burst battery unit strings for the burst battery unit string after parallel connection
Component rated power, operating current and voltage etc.；
(4) the general components materials such as glass, backboard and encapsulating material and process are combined by the cell package after above-mentioned interconnection
Into complete component.If using transparent polymer backboard or glass back plate, that is, module backside is caused equally to have incident light, when
When the back side of battery used has translucent construction, cell backside can also generate electricity, and said modules can makes generating electricity on two sides group
Part.
Beneficial effect：Compared with prior art, back-contact solar module provided by the present invention and preparation method,
Back-contact solar cell has special symmetrical structure, is divided into several single sharding units, and electrode converging point is (positive and negative
Electrode points) small blade unit both sides are distributed in, it is positive and negative extremely short simply to carry out very much the adjacent cell piece back side when being prepared into component
Interconnected apart from straight line.In addition, the operating current of small blade unit subtracts significantly much smaller than sheet, the internal resistance power attenuation of cell piece interconnection
It is few, ultra-thin and small cross-sectional area interconnecting strip so can be selected again, with reference to short interconnection distance, it is contemplated that interconnecting strip consumption can be reduced
Amount more than 90%, cost is both significantly reduced, while also make it more because ultra-thin interconnecting strip reduces the stress to cell piece
It is suitable for the encapsulation of slimline battery piece, has greatly to drop originally to carry and imitate space.
Brief description of the drawings
Fig. 1 a are back-contact back of solar cell structural representation of the present invention；
Electrical interconnection structural representation when Fig. 1 b are making component of the present invention between burst battery unit；
Fig. 2 a are the full back-contact IBC cell backside structural representations described in application example of the present invention；
Fig. 2 b are that the electrical interconnection structure between the full back-contact IBC burst battery units described in application example of the present invention is shown
It is intended to；
Fig. 3 a are the MWT battery structure schematic diagram described in application example of the present invention；
Fig. 3 b are the electrical interconnection structural representation between the MWT burst battery units described in application example of the present invention.
Embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention, after the present invention has been read, various equivalences of the those skilled in the art to the present invention
The modification of form falls within the application appended claims limited range.
As shown in Fig. 1 a- Fig. 1 b, a kind of back-contact solar module, back-contact solar cell 1 is provided with scribing
The position line 10, back-contact solar cell 1 can be divided into several identical burst battery units 11 along the scribing position line 10, often
Two long sides of individual burst battery unit 11 are respectively equipped with a row positive electrode point 110 and a row negative electrode point 111, positive electrode point
110 and negative electrode point 111 on the axial symmetry of burst battery unit 11；The adjacent positive electrode point 110 of two burst battery units 11
It is symmetrical on the burst scribing position line 10 with negative electrode point 111；, only need to be by adjacent burst battery list when interconnection package is into component
Each pair positive electrode point 110 and negative electrode point 111 of the member 11 positioned at the both sides of the scribing position line 10 are mutual by the straight line of interconnecting strip 12 respectively
String is unified into, the burst battery unit 11 for interconnecting bunchiness carries out connection in series-parallel and set to form complete assembly circuit, described group
Part circuit after the processes such as follow-up existing lamination, attaching line box by being made complete solar module finished product.
The preparation method of above-mentioned back-contact solar module, comprises the following steps：
(1) the back-contact solar cell 1 of specific back electrode structure as shown in Figure 1a, this cell backside electrode are prepared
With translational symmetry structure, several (general 2~12) the small burst battery units 11 repeated can be divided into, in small point
Positive and negative electrode point is located at long side both sides respectively in piece battery unit 11.Concrete operations are：Made on back-contact solar cell 1
The scribing position line 10 between burst battery unit 11 and burst battery unit 11, in two long sides of each burst battery unit 11
A row positive electrode point 110 and a row negative electrode point 111 are made on side respectively, positive electrode point 110 and negative electrode point 111 are on burst
The axial symmetry of battery unit 11；The adjacent positive electrode point 110 of two burst battery units 11 and negative electrode point 111 are on burst scribing
The position line 10 is symmetrical；
(2) scribing is carried out using the scribing position line 10 shown in the modes along Fig. 1 a such as laser, plasma or machinery, will
Large stretch of cell piece is divided into several identical burst battery units 11；
(3) as shown in Figure 1 b, when burst battery unit 11 being assembled into component, by the adjacent order of burst battery unit 11
Marshalling, the positive and negative electrode point between connecting adjacent burst battery unit 11 respectively with interconnecting strip 12, interconnecting strip 12 can be
Welding or other sheet metals, the forms such as welding or conductive adhesive can be used during interconnection, interconnect the burst of bunchiness
For the quantity of battery unit 11 typically at 2~500, the interconnection burst battery unit 11 of bunchiness can further carry out parallel connection to improve work
Make electric current, typically can parallel connection 2~10 go here and there, as needed, it is in parallel after burst battery unit 11 go here and there and can also further connect it
His burst battery unit 11 is gone here and there to obtain suitable component rated power, operating current and voltage etc.；
(4) the general components materials such as glass, backboard and encapsulating material and process are combined by the cell package after above-mentioned interconnection
Into complete component.If using transparent polymer backboard or glass back plate, said modules can be made into generating electricity on two sides group
Part.
Embodiment 1：
The present embodiment provides a kind of implementation of the full back-contact of N-type (IBC) battery and component；
The full back-contact of N-type (IBC) battery component：
As illustrated in figures 2 a-2b, the full back-contact of N-type (IBC) cell backside be printed with 6 positive electrode confluences 20 of a row,
The one negative electrode confluence 21 of row 6, comb teeth-shaped positive electrode grid line 22 corresponding with each positive electrode confluence 20 and with it is each negative
Comb teeth-shaped negative electrode grid line 23 corresponding to electrode converging point 21, the full back-contact of N-type (IBC) battery are provided with the scribing position line
10, the full back-contact of N-type (IBC) battery can be divided into 6 identical burst battery units 11 by the scribing position line 10；Positive electrode
Confluence 20 and negative electrode confluence 21 are separately positioned on 11 liang of long sides of burst battery unit, and positive electrode confluence 20 and negative
Electrode converging point 21 is located at the both sides of the scribing position line 10 on the axial symmetry of burst battery unit 11, adjacent burst battery unit 11
Each pair positive electrode confluence 20 and negative electrode confluence 21 are welded by welding interconnect respectively, welding thickness preferably 0.05~
0.3mm, width is in 0.2~2mm.
The full back-contact battery component of 72 full wafers (6 × 12) N-type of matching convention, can be every 36 burst battery units 11
(equivalent to 6 full wafers, 1/6) what the operating current of burst battery unit 11 only had full wafer mutually interconnects bunchiness, then every 6 string burst electricity
Together (1 group string), such operating current is just consistent the connection in series-parallel of pool unit 11 with general components, then 2 group strings
It is cascaded again and is formed complete 432 small pieces (36 × 12, equivalent to a 72 full wafers) component, can be between group string
Protection diode is connect again.
The implementation of the full back-contact of N-type (IBC) battery component：
(1) as shown in Figure 2 a, this IBC cell backsides are printed with specific grid line and confluence structure, by row 6 just
Electrode converging point 20,6 negative electrode confluences 21 of a row, comb teeth-shaped positive electrode grid line corresponding with each positive electrode confluence 20
22 and comb teeth-shaped negative electrode grid line 23 corresponding with each negative electrode confluence 21 be respectively printed at the full back-contact of N-type (IBC)
Cell backside, sets the scribing position line 10 on the full back-contact of N-type (IBC) battery, the IBC batteries of full wafer can use laser,
The mode such as plasma or machinery is divided into 6 small blade units of identical along the scribing position line 10 --- burst battery unit 11；
(2) as shown in Figure 2 b, after monolithic IBC batteries are divided into 6 burst battery units 11, carried out using welding adjacent
Positive electrode confluence 20 and the welding interconnection of negative electrode confluence 21 between burst battery unit 11, welding thickness is preferably 0.05
~0.3mm, width is in 0.2~2mm；
(3) 72 full wafers (6 × 12) component of matching convention, can every 36 burst battery units 11 (equivalent to 6 full wafers,
1/6) what the operating current of burst battery unit 11 only had full wafer mutually interconnects bunchiness, then every 6 connection in series-parallel (1 group together
String), such operating current is just consistent with general components, then 2 group strings be cascaded again be formed one it is complete
Whole 432 small pieces (36 × 12, equivalent to 72 full wafers) component, group can also connect protection diode again between going here and there；
(4) the general components materials such as glass, backboard and encapsulating material and process are combined by the cell package after above-mentioned interconnection
Into complete component.If using transparent polymer backboard or glass back plate, said modules can be made into generating electricity on two sides group
Part.
Embodiment 2：
The present embodiment provides the implementation that a kind of p-type metal winding penetrates (MWT) back-contact battery and component：
The winding of p-type metal penetrates (MWT) back-contact battery component, includes the scribing position line 10, along the scribing position line
The winding of p-type metal can be penetrated (MWT) back-contact battery by 10 is divided into 5 identical burst battery units 11, each burst
Two long sides of battery unit 11 are respectively equipped with a row 8 positive electrode points, 110 and one row, 8 negative electrode points 111, positive electrode point
110 and negative electrode point 111 on the axial symmetry of burst battery unit 11；As shown in Figure 3 a, this MWT battery back up has the aluminium back of the body
Field 30 and confluence structure, positive electrode point 110 are to collect electric current by Al-BSF 30, and negative electrode point 111 is by laser hole
Collect front gate line electric current, the MWT battery of full wafer can be divided into 5 small blade units of identical --- burst battery unit 11；
The adjacent positive electrode point 110 of two burst battery units 11 and negative electrode point 111 are on the burst scribing position line 10
Symmetrically；When interconnection package is into component, only adjacent burst battery unit 11 need to be located at often aligning for the both sides of the scribing position line 10
Electrode points 110 and negative electrode point 111 distinguish straight line interconnection bunchiness；As shown in Figure 3 b, monolithic MWT battery is being divided into 5
After burst battery unit 11, the positive and negative electrode point carried out using copper foil small pieces between adjacent dice is interconnected, and copper thickness preferably exists
0.01~0.1mm, width are bonded or welded by conducting resinl or tin cream between 0.2~2mm, electrode points and copper foil small pieces
Connect.
P-type metal winds the implementation for penetrating (MWT) back-contact battery component：
(1) as shown in Figure 3 a, this MWT battery back up has Al-BSF 30 and confluence structure, and positive electrode point 110 is
Electric current is collected by Al-BSF 30, negative electrode point 111 is to collect front gate line electric current, the MWT battery of full wafer by laser hole
5 small blade units of identical can be divided into；The scribing position line 10 that MWT battery is 5 identical burst battery units 11 will be split,
A row 8 positive electrode points, 110 and one row, 8 negative electrode points 111 of two long sides of each burst battery unit 11, are arranged on
In MWT battery, wherein positive electrode point 110 and negative electrode point 111 are on the axial symmetry of burst battery unit 11；Using laser, etc. from
The mode such as daughter or machinery carries out scribing along the scribing position line 10, and large stretch of MWT battery is divided into 5 identical burst battery lists
Member 11；
(2) as shown in Figure 3 b, after monolithic MWT battery is divided into 5 burst battery units 11, carried out using copper foil small pieces
Adjacent pair positive and negative electrode point interconnection between adjacent burst battery unit 11, copper thickness is preferably in 0.01~0.1mm, width
In 0.2~2mm, it is bonded or is welded by conducting resinl or tin cream between electrode points and copper foil small pieces；
(3) 60 full wafers (6 × 10) component of matching convention, can every 30 burst battery units 11 (equivalent to 6 full wafers,
1/5) what the operating current of burst battery unit 11 only had full wafer mutually interconnects bunchiness, then every 5 connection in series-parallel (1 group together
String), such operating current is just consistent with general components, then 2 group strings be cascaded again be formed one it is complete
Whole 300 small pieces (30 × 10, equivalent to 60 full wafers) component, group can also connect protection diode again between going here and there；
(4) the general components materials such as glass, backboard and encapsulating material and process are combined by the cell package after above-mentioned interconnection
Into complete component.If using transparent polymer backboard or glass back plate, said modules can be made into generating electricity on two sides group
Part.
Claims (9)
- A kind of 1. back-contact solar module, it is characterised in that：Back-contact solar cell is provided with the scribing position line, edge Back-contact solar cell can be divided into several identical burst battery units by the scribing position line, each burst battery unit Two long sides are respectively equipped with a row positive electrode point and a row negative electrode point, and positive electrode point and negative electrode point are on burst battery unit Axial symmetry；The adjacent positive electrode point and negative electrode point of two adjacent burst battery units are on the burst scribing position line pair Claim；When interconnection package is into component, adjacent burst battery unit is located to the adjacent each pair positive electrode of scribing position line both sides Point and negative electrode point interconnect bunchiness respectively；The burst battery unit of interconnection bunchiness carries out connection in series-parallel setting again, to form complete assembly circuit, the assembly circuit It can be made into complete solar module finished product.
- 2. back-contact solar module as claimed in claim 1, it is characterised in that：Back-contact solar module is The full back-contact battery component of N-type, the full back-contact cell backside of N-type are printed with a row positive electrode confluence, a row negative electrode Confluence, comb teeth-shaped positive electrode grid line corresponding with each positive electrode confluence and broach corresponding with each negative electrode confluence Shape negative electrode grid line, the full back-contact battery of N-type are provided with the scribing position line, and the scribing position line can be by the full back-contact electricity of N-type Pond is divided into multiple identical burst battery units；Positive electrode confluence and negative electrode confluence are separately positioned on burst battery list First two long sides, and positive electrode confluence and negative electrode confluence are on burst battery unit axial symmetry, adjacent burst battery list Member interconnects respectively positioned at the adjacent each pair positive electrode confluence of scribing position line both sides and negative electrode confluence, interconnects into burst Battery unit string, burst battery unit string carry out connection in series-parallel and set to form complete assembly circuit, and the assembly circuit passes through Complete solar module finished product is made after the processes such as follow-up existing lamination, attaching line box.
- 3. back-contact solar module as claimed in claim 1, it is characterised in that：It is located on adjacent burst battery unit The adjacent each pair positive electrode point and negative electrode point of scribing position line both sides are interconnected into burst battery by interconnecting strip straight line respectively Unit string.
- 4. back-contact solar module as claimed in claim 3, it is characterised in that：Interconnecting strip is welding or metal foil Piece, interconnecting strip pass through welding or conductive adhesive positive electrode point and negative electrode point.
- 5. back-contact solar module as claimed in claim 1, it is characterised in that：It is located on adjacent burst battery unit The adjacent each pair positive electrode point and negative electrode point of scribing position line both sides are welded by welding interconnect respectively, and welding thickness is preferred In 0.05 ~ 0.3mm, width is in 0.2 ~ 2mm.
- 6. back-contact solar module as claimed in claim 1, it is characterised in that：2 ~ 500 burst battery unit strings Burst battery unit string is unified into, 2 ~ 10 string burst battery unit strings are electric to form complete component by parallel and serial respectively Road.
- 7. back-contact solar module as claimed in claim 1, it is characterised in that：Back-contact solar cell is p-type Metal winding penetrates back-contact battery, and the winding of p-type metal penetrates back-contact battery and is provided with the scribing position line, along scribing position Put line and p-type metal can be wound and penetrate back-contact battery and be divided into multiple identical burst battery units, each burst battery Two long sides of unit are respectively equipped with a row positive electrode point and a row negative electrode point, and positive electrode point and negative electrode point are on burst electricity Pool unit axial symmetry；The winding of p-type metal penetrates back-contact cell backside and is printed with Al-BSF, and positive electrode point is converged by Al-BSF Colleeting comb, negative electrode point collect front gate line electric current by laser hole；The adjacent positive electrode point of two adjacent burst battery units and negative electrode point are symmetrical on the burst scribing position line；It is adjacent Burst battery unit is located at the adjacent each pair positive electrode point of scribing position line both sides and negative electrode point interconnects respectively.
- 8. back-contact solar module as claimed in claim 3, it is characterised in that：Interconnecting strip is copper foil, copper thickness For 0.01 ~ 0.1mm, width is 0.2 ~ 2mm, is bonded or is welded by conducting resinl or tin cream between electrode points and copper foil.
- 9. a kind of preparation method of back-contact solar module, it is characterised in that comprise the following steps：（1）The scribing position line between burst battery unit and burst battery unit is made on back-contact solar cell, A row positive electrode point and a row negative electrode point, positive electrode point and negative electricity are made respectively on two long sides of each burst battery unit Limit is on burst battery unit axial symmetry；The adjacent positive electrode point of two adjacent burst battery units and negative electrode point burst The scribing position line is symmetrical；（2）Scribing is carried out along the scribing position line, large stretch of cell piece is divided into several identical burst battery units；（3）When burst battery unit is assembled into component, adjacent burst battery unit order marshalling is divided with interconnecting strip The positive and negative electrode point between adjacent burst battery unit is not connected, forms burst battery unit string, can after battery unit connection in series-parallel Other burst battery unit strings connect with the battery of the component rated power, operating current and the voltage that are needed；（4）By the cell package after above-mentioned interconnection into complete component.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711062891.3A CN107863396A (en) | 2017-11-02 | 2017-11-02 | A kind of back-contact solar module and preparation method |
| PCT/CN2018/088318 WO2019085447A1 (en) | 2017-11-02 | 2018-05-25 | Back-contact solar cell assembly and preparation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711062891.3A CN107863396A (en) | 2017-11-02 | 2017-11-02 | A kind of back-contact solar module and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107863396A true CN107863396A (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711062891.3A Pending CN107863396A (en) | 2017-11-02 | 2017-11-02 | A kind of back-contact solar module and preparation method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107863396A (en) |
| WO (1) | WO2019085447A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019085447A1 (en) * | 2017-11-02 | 2019-05-09 | 江苏日托光伏科技股份有限公司 | Back-contact solar cell assembly and preparation method therefor |
| CN114193916A (en) * | 2021-12-27 | 2022-03-18 | 南京日托光伏新能源有限公司 | Screen printing scraper for MWT solar cell |
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| TW202101780A (en) * | 2019-05-23 | 2021-01-01 | 美商阿爾發金屬化工公司 | Solder paste for module fabrication of solar cells |
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| WO2019085447A1 (en) | 2019-05-09 |
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