CN107342341B - Half solar cell module and welding method thereof - Google Patents
Half solar cell module and welding method thereof Download PDFInfo
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- CN107342341B CN107342341B CN201710551808.2A CN201710551808A CN107342341B CN 107342341 B CN107342341 B CN 107342341B CN 201710551808 A CN201710551808 A CN 201710551808A CN 107342341 B CN107342341 B CN 107342341B
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- 238000003466 welding Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000003475 lamination Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 229910000679 solder Inorganic materials 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000632 Alusil Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- H01L31/04—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
- H01L31/18—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
-
- 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)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a half-piece solar cell module and a welding method thereof.A bus bar which is vertical to the interconnection bar is respectively welded on the interconnection bar at two ends of a cell string so as to connect the interconnection bar at the same end of the cell string through the bus bar; arranging two or more processed battery strings in a head-to-tail splicing manner to obtain a battery string series; arranging two or more battery string series side by side, and directly welding bus bars positioned at two ends of the adjacent battery string series between the adjacent battery string series or adding a lap welding bus bar for lap welding to weld the bus bars at the two ends to obtain a battery string unit; two or more battery string units are arranged side by side, and bus bars between adjacent battery string units and positioned at the head-tail splicing positions of the battery string series are directly welded or welded by adding a lap welding bus bar for lap welding. The invention greatly improves the production efficiency of the half solar cell module.
Description
Technical field
The invention belongs to manufacture of solar cells processing technique fields, and in particular to a kind of half solar cell module and
Its welding method.
Background technology
Solar cell be it is a kind of luminous energy being converted into using photoelectric effect or photochemical effect the device of electric energy, and claimed
For solar chip or photocell.According to using material and technology difference, solar cell to be broadly divided into two major classes, one kind is brilliant
Body silicon solar cell, one kind are thin-film solar cells.At present either from the point of view of global solar battery product structure, also
It is from the point of view of the maximum China of solar cell yield, crystal silicon battery is in occupation of absolute advantage.
There is the metallic electrode that main grid and secondary grid are constituted in the front of most crystal silicon solar energy batteries, and the back side, which has, only contains master
The rest part of the metallization back electrode of grid, the back side is covered by the slurry containing aluminium.Positive main grid and secondary grid usually mutually hang down
Straight to be arranged in H-type, secondary grid line collects the electric current that inside battery generates, is then flowed to main gate line.In order to reduce the slurry of main gate line
Expect that dosage, the main grid of front and back can make segmented or intermediate hollow out.The cell backside of aluminium paste covering is burnt in high temperature
Alusil alloy and Al-BSF are formed after knot, the latter, which has, reduces Carrier recombination, promotes the effect of battery efficiency.
Crystal silicon solar energy battery and slice battery are the battery units for the more small area being cut into complete cell piece.By
Component is referred to as being sliced battery component made of several slice battery connection post packages.It is not sliced conventional group of battery with use
Part is compared, and slice battery component is due to battery unit area smaller used, in component electric current, component voltage, component face
It accumulates, component internal power attenuation, can be better than general components in the performances such as component preventing hot spot.Such as by battery along perpendicular to main grid
Line direction is divided into two half, then by manufactured half battery component after the half cell package of double amount, due to every root bead
Take by electric current there was only the half of general components, therefore reduce component internal due to caused by Joule effect power damage
Consumption, improves the transfer efficiency of component.And the power loss caused by interconnecting strip welding in component becomes full wafer component
1/4 or so, therefore the power of half battery component can improve 2% or so with respect to same kind full wafer battery component.
Fig. 1 is the existing attachment structure schematic diagram based on typical five main grids half solar cell module（120 half
A kind of typical connection type of cell piece）, the interconnecting strip welding of medial end portions connection marks, and the interconnecting strip welding of other parts
Or grid line is simplified and saves.As shown in Figure 1, in the lamination procedure of half battery component, the welding of battery strings and confluence have one
The half above workload is at the intermediate position of component, has been difficult to meet greatly by the production line based on traditional human weld
The needs of batch production, wherein Fig. 2 are the partial enlarged view at A, B.As shown in Fig. 1 ~ Fig. 3,1a is half cell piece, and 2a is mutual
Bracing, 3a are busbar, and 4a is lead-out wire, and 6a is the pad of interconnecting strip 2a and busbar 3a.For the five main grid half sun
Energy battery component, when lamination welds, it is 126 to need the total quantity of the solder joint welded, wherein 120 are busbar and interconnection
The solder joint of item, 6 are lead-out wire solder joint.66 solder joints are shared at middle part, 60 solder joints therein need to weld interconnecting strip welding
Middle part is connected on to share on busbar 3.And number of welds of the five main grid full wafer battery component of standard in lamination procedure is 64（It concentrates
Formula terminal box）Or 66（Split type connecting box）, and solder joint is all located at the short side end of component.Therefore, half battery is switched to
After component design, it is 3 ~ 5 times of full wafer battery component that lamination welding sequence, which takes amount to increase, the production efficiency of half battery component
Relatively low, lamination difficulty becomes the main bottleneck for restricting the large-scale production of half component.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of welding methods of half solar cell module, improve half
The production efficiency of piece solar cell module.
The technical scheme is that：A kind of welding method of half solar cell module, includes the following steps：
（1）Multiple half cell pieces are serially coupled into battery strings by interconnecting strip welding；
（2）One and the vertically arranged busbar of interconnecting strip are respectively welded in the interconnecting strip positioned at battery strings both ends, with
Make the interconnecting strip being located on battery strings the same end pass through the busbar to connect；
（3）By two or more via step（2）Battery strings after processing arrange cloth in such a way that head and the tail splice
It sets, obtains battery strings series；
（4）Two or more battery strings series are arranged side by side, and by between adjacent cell string series, and positioned at electricity
The busbar at the serial both ends of pond string directly welds or increases a joint welding busbar for joint welding by the both ends
Busbar welds, and obtains battery string location；
（5）Two or more battery string locations are arranged side by side, and by between adjacent cell string location, and positioned at electricity
The busbar of pond string serial head and the tail stitching portion directly welds or increases a joint welding busbar for joint welding and carries out lead-out wire
Welding, obtains the half solar cell module.
The present invention remittance that welding in advance is connected for that will be located at the interconnecting strip on battery strings the same end on battery strings both ends
Item is flowed, is gone here and there based on the list that end is converged in advance, in lamination welding process, battery strings are placed according to the spacing that component designs
On doubling film, the method according to the invention welds battery strings.Welding method using the present invention, it is possible to reduce folded
Pad quantity in layer welding process, substantially increases welding efficiency, to improve the production of half solar cell module
Efficiency.
Wherein by the step（3）With（4）In cut off beyond the part at cell piece edge for the joint welding busbar of joint welding,
Ensure that component keeps the creepage distance and electric clearance of safety.
Preferably, the length of the busbar is isometric.
Preferably, it is L1 to be located at the distance between main gate line of half cell piece both sides on the half cell piece；Institute
It states in battery string location, the distance between adjacent electrode is L2 between two half cell pieces being arranged side by side；The busbar
Length be more than L1, and be less than L1+2 × L2.
Preferably, the busbar is using the center line of the half cell piece width direction as the symmetrical cloth of Axisymmetric Distributed Line
It sets.Busbar is with opposite half cell piece arrangement substantially symmetrical about its central axis, when being welded by bonding machine, if the length of busbar is small
When L1, it is not easy to by way of joint welding be welded using joint welding busbar；If the length of busbar is more than L1+2 × L2
When, the length of busbar is long, causes the waste of busbar, increases the manufacturing cost of the present invention.
Preferably, in the battery strings series, the distance between two busbars of battery strings head and the tail stitching portion
For 0 ~ 20mm.
Preferably, in the battery string location, lead-out wire, the extraction wire bonding are respectively welded in battery strings series
In battery strings series on two parallel busbars of head and the tail stitching portion.
Preferably, the half cell piece is the half cell piece for including 2 ~ 5 main gate lines.
As a further preference, the half cell piece is the half cell piece for including 5 main gate lines.
The present invention also provides a kind of half solar cell modules, when half solar cell module is welded,
It welds to obtain using above-mentioned welding method.When preparing half solar cell module, welding procedure therein, using the present invention
Welding method welded, a kind of half solar cell module is finally prepared.
Compared with prior art, beneficial effects of the present invention are embodied in：
Traditional half battery component lamination production efficiency can be improved 70% ~ 80% by the present invention, at the same time also substantially be dropped
The hidden possibility split occurs in low traditional handicraft lamination process, to be greatly reduced manufacturing cost, application range of the invention compared with
Extensively, the welding of the half solar cell module of arbitrary main grid number can be expanded to.
Description of the drawings
Fig. 1 is traditional five main grid half battery component lamination connection diagrams in the prior art.
Fig. 2 is the enlarged structure schematic diagram at A in Fig. 1.
Fig. 3 is the enlarged structure schematic diagram at B in Fig. 1.
Fig. 4 is five main grid half battery component lamination connection diagrams in the present invention.
Fig. 5 is the enlarged structure schematic diagram at C in Fig. 4.
Fig. 6 is the enlarged structure schematic diagram at D in Fig. 4.
Fig. 7 is the structural schematic diagram of battery strings in the present invention.
Fig. 8 is the structural schematic diagram of battery strings series in the present invention.
Fig. 9 is the structural schematic diagram of battery string location in the present invention.
Specific implementation mode
Embodiment 1
A kind of welding method of half solar cell module, includes the following steps：
（1）Multiple half cell pieces 1 are serially coupled into battery strings by interconnecting strip welding（See Fig. 7）；
（2）One and the vertically arranged busbar 3 of interconnecting strip are respectively welded in the interconnecting strip 2 positioned at battery strings both ends,
So that the interconnecting strip 2 on battery strings the same end is connected by the busbar 3, wherein
The length of busbar 3 is isometric, and busbar 3 is using the center line of 1 width direction of half cell piece as axis pair
Line is claimed to be arranged symmetrically；
（3）Based on single string that end is converged in advance, in lamination welding process, spacing that battery strings are designed according to component
It is placed on doubling film, by two or more via step（2）Battery strings after processing are arranged in such a way that head and the tail splice
Row arrangement obtains battery strings series（See Fig. 8）；
（4）Two or more battery strings series are arranged side by side, and by between adjacent cell string series, and positioned at electricity
The busbar 3 at the serial both ends of pond string directly welds or increases a joint welding busbar for joint welding by the confluence at both ends
Item 3 welds, and obtains battery string location（See Fig. 9）；
（5）Two or more battery string locations are arranged side by side, and by between adjacent cell string location, and positioned at electricity
Joint welding busbar of the directly welding of busbar 3 or increase by one of pond string serial head and the tail stitching portion for joint welding is welded；
The distance between the main gate line 11 for being located at 1 both sides of half cell piece on half cell piece 1 is L1；In battery string location, two simultaneously
The distance between adjacent electrode is L2 between the half cell piece 1 that arrangement is set；The length of busbar 3 is more than L1, and is less than L1+2
×L2；
（6）In battery string location, lead-out wire 4 is respectively welded in battery strings series, lead-out wire 4 is welded in battery strings system
In row on two parallel busbars 3 of head and the tail stitching portion.
The present embodiment is with five main grid half solar cell modules（Including 120 pieces of half cell pieces）For, such as Fig. 5 and figure
Shown in 6, when reference numeral 5 is that lamination welds in figure, weldering when busbar 3 is welded with the busbar 3 in adjacent cell string series
Contact；Reference numeral 6 is the pad of busbar 3 and interconnecting strip 2 in figure；7 be the pad of busbar 3 and lead-out wire 4.
By Fig. 4 ~ Fig. 6 it is found that if the joint welding of busbar 3 itself, the quantity of solder joint is 10；If the joint welding for increasing auxiliary converges
Item is flowed, then welding quantity is 20.Lead-out wire 4 is located in the middle part of component, and symmetrically parallel busbar welds jointly for two rows of upper and lower positions
Connect a lead-out wire welding, the pad sum totally 12 of busbar and lead-out wire.
Note：The interconnecting strip welding that attached drawing medial end portions connect in the present invention marks, and the interconnecting strip welding or grid of other parts
Line, which is simplified, to be saved.
Claims (8)
1. a kind of welding method of half solar cell module, which is characterized in that include the following steps：
(1) multiple half cell pieces are serially coupled into battery strings by interconnecting strip welding；
(2) one and the vertically arranged busbar of interconnecting strip are respectively welded in the interconnecting strip positioned at battery strings both ends, so that position
It is connected by the busbar in the interconnecting strip on battery strings the same end；
(3) arranged in such a way that head and the tail splice of the battery strings by two or more after being handled via step (2), obtains
To battery strings series；
(4) two or more battery strings series are arranged side by side, and by between adjacent cell string series, and are located at battery strings
The busbar at serial both ends directly welds or increases a joint welding busbar for joint welding by the confluence at the both ends
Item welds, and obtains battery string location；
(5) two or more battery string locations are arranged side by side, and by between adjacent cell string location, and are located at battery strings
The joint welding busbar of the directly welding of the busbar of serial head and the tail stitching portion or increase by one for joint welding is welded, and institute is obtained
State half solar cell module；
The distance between the main gate line for being located at half cell piece both sides on the half cell piece is L1；The battery string location
In, the distance between adjacent electrode is L2 between two half cell pieces being arranged side by side；The length of the busbar is more than L1,
And it is less than L1+2 × L2.
2. the welding method of half solar cell module as described in claim 1, which is characterized in that the length of the busbar
It spends isometric.
3. the welding method of half solar cell module as described in claim 1, which is characterized in that the busbar is with institute
The center line for stating half cell piece width direction is arranged symmetrically for Axisymmetric Distributed Line.
4. the welding method of half solar cell module as described in claim 1, which is characterized in that the battery strings series
In, the distance between two busbars of battery strings head and the tail stitching portion are 0~20mm.
5. the welding method of half solar cell module as described in claim 1, which is characterized in that the battery string location
In, lead-out wire is respectively welded in battery strings series, the lead-out wire is welded in battery strings series positioned at head and the tail stitching portion
On two parallel busbars.
6. the welding method of half solar cell module as described in claim 1, which is characterized in that the half cell piece
To include the half cell piece of 2~5 main gate lines.
7. the welding method of half solar cell module as claimed in claim 6, which is characterized in that the half cell piece
To include the half cell piece of 5 main gate lines.
8. a kind of half solar cell module, which is characterized in that when being welded half solar cell module, using power
Profit requires 1~7 any welding method to weld to obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551808.2A CN107342341B (en) | 2017-07-07 | 2017-07-07 | Half solar cell module and welding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551808.2A CN107342341B (en) | 2017-07-07 | 2017-07-07 | Half solar cell module and welding method thereof |
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| CN107342341A CN107342341A (en) | 2017-11-10 |
| CN107342341B true CN107342341B (en) | 2018-10-30 |
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| CN107452824A (en) * | 2017-08-14 | 2017-12-08 | 江阴艾能赛瑞能源科技有限公司 | A kind of new type solar energy half cell piece and its preparation method and application |
| CN110349876A (en) * | 2019-07-10 | 2019-10-18 | 晶澳太阳能有限公司 | The measurement tooling and measurement method of photovoltaic module extraction linear dimension |
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| US7390961B2 (en) * | 2004-06-04 | 2008-06-24 | Sunpower Corporation | Interconnection of solar cells in a solar cell module |
| JPWO2012001815A1 (en) * | 2010-07-02 | 2013-08-22 | 三菱電機株式会社 | Solar cell module |
| WO2014045909A1 (en) * | 2012-09-22 | 2014-03-27 | 株式会社ノリタケカンパニーリミテド | Solar cell module, and method for producing same |
| CN204632785U (en) * | 2015-06-04 | 2015-09-09 | 浙江晶科能源有限公司 | A kind of photovoltaic module |
| CN206047395U (en) * | 2016-10-09 | 2017-03-29 | 阿特斯(中国)投资有限公司 | Solar photovoltaic assembly |
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Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant after: trina solar Ltd. Address before: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant before: CHANGZHOU TRINA SOLAR ENERGY Co.,Ltd. Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant after: TRINASOLAR Co.,Ltd. Address before: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant before: trina solar Ltd. |
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Effective date of registration: 20201218 Address after: No. 801, Longqi Road, Suxi Town, Yiwu City, Jinhua City, Zhejiang Province (self declaration) Patentee after: Trina Solar Energy (Yiwu) Technology Co.,Ltd. Address before: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee before: TRINASOLAR Co.,Ltd. |