CN106449804A - Electrode grid line structure and solar battery piece - Google Patents
Electrode grid line structure and solar battery piece Download PDFInfo
- Publication number
- CN106449804A CN106449804A CN201611177571.8A CN201611177571A CN106449804A CN 106449804 A CN106449804 A CN 106449804A CN 201611177571 A CN201611177571 A CN 201611177571A CN 106449804 A CN106449804 A CN 106449804A
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- thin grid
- line structure
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- 239000007787 solid Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 230000011218 segmentation Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000002800 charge carrier Substances 0.000 abstract 2
- 238000013461 design Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—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
- H01L31/022433—Particular geometry of the grid contacts
-
- 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
Abstract
The invention discloses an electrode grid line structure and a solar battery piece. The problem of collecting a charge carrier under a grid breakage condition is solved, the charge carrier collection rate is increased, current collection of a battery piece can be facilitated, and the battery piece conversion efficiency can be improved. The electrode grid line structure comprises a plurality of main grids and a plurality of first fine grids, wherein the main grids extend in a longitudinal direction respectively; the first fine grids extend in a transverse direction respectively; the plurality of the main grids are arranged at intervals in the transverse direction; the plurality of the first fine grids are arranged at intervals in the longitudinal direction; the main grids and the first fine grids are respectively intersected in a grid manner and are thus connected and communicated with each other; at least one second fine grid for connecting and communicating two fine grids is connected between two adjacent fine grids; five main grids are provided; the central lines of the first fine grids are perpendicular to those of the main grids; and the central lines of the second fine grids are parallel to those of the main grids.
Description
Technical field
The invention belongs to solar battery sheet field, a kind of more particularly to electrode grid line structure and with this gate electrode line
The solar battery sheet of structure.
Background technology
Crystal silicon solar cell sheet industrialization technology is highly developed at present, but compared with conventional energy resource, relative
The product quality of higher cost, relatively low efficiency and high-quality constrains its development, for how reduces cost, improve conversion
Efficiency and product quality, people have carried out substantial amounts of research.
In current silicon solar cell manufacturing cost, front side silver paste cost accounting reaches more than 10% substantially, screen printing dataller
It is the effectively solving measure for reducing cell piece silver paste consumption and improved efficiency that skill develops to graph thinning direction, and follow-up development
Trend.Silk screen printing or technology development priority, according to the prediction of ITRPV, with the development of silk screening techniques technique, silver-colored in recent years
Slurry consumption gradually will lower, and be reduced to 0.04g/cell to 2021 yearly consumptions, accordingly, silk screen printing grid line width to 2021
Live width will decrease to 30um or so, reach the silk screen printing limit.But as grid line width constantly reduces, print the disconnected grid problem of thin grid
Gradually can highlight.
In present solaode blade manufacturing process, three main grids of cell piece front electrode, the base of four main grid forms
The design, adds the thin grid composition perpendicular to main grid, and between main grid, spacing is still relatively large, and under the same conditions, main grid spacing is got over
Greatly, electric current carrying pathway is longer, and power attenuation is bigger.Passed by thin grid mainly due to the photoelectric current that cell piece is produced under light illumination
Defeated be collected to main grid, during transmitting to main grid, with the original such as the compound of photogenerated current itself and thin grid metallic resistance itself
Cause, is to a certain degree generating larger power attenuation.
On the other hand, design for existing front electrode, if there is grid phenomenon of breaking, photoelectric current is difficult to converge, collects
To main grid, by EL test being carried out to existing cell piece, can be clearly seen that the status transmission of photoelectric current.Find in disconnected grid
Place, photoelectricity streaming is obstructed, and grid line is burnt out on grid line at disconnected grid by electron concentration, causes grid line at disconnected grid to black, causes
Product efficiency is low, of poor quality.
Content of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art and problem, it is proposed that a kind of electrode grid knot
Structure and solar battery sheet, solve the problems, such as to resolve in the case of grid the collection of carrier and increase carrier collection rate, be conducive to electricity
Collection of the pond piece to electric current, lifts cell piece conversion efficiency.
The technical solution used in the present invention is as follows：
A kind of electrode grid line structure, including multiple main grids for extending longitudinally respectively and multiple extend transversely first thin
Grid, the laterally spaced setting of the plurality of main grid, the longitudinally spaced setting of the multiple first thin grid, each main grid and each institute
State the first thin grid to intersect in latticed to be connected with each other conducting respectively, being connected with least one between two neighboring first thin grid can
The two is connected with each other the second thin grid of conducting.
Preferably, the central axis of the described first thin grid are in the centrage of the main grid；
And/or；
The centerline parallel of the second thin grid is in the centrage of the main grid.
Preferably, the second thin grid between i-th the first thin grid of row and the thin grid of i+1 row first are connected to be connected to i-th+
The second thin grid between 1 the first thin grid of row and i-th+2 the first thin grid of row are parallel and conllinear, and wherein i=1,2 ... N-2, N are first
The number of thin grid.
Preferably, each inframe for being surrounded by the adjacent first thin grid of two adjacent main grids and two is respectively provided with least one
Individual the second described thin grid.
Preferably, the plurality of main grid is transversely arranged at equal intervals；
And/or；
The plurality of first thin grid are arranged at equal intervals along longitudinal direction.
Preferably, the electrode grid line structure includes the main grid described in five.
It is highly preferred that the width that the centreline spacing of adjacent main grid is 20 ~ 39cm, the main grid is 0.1 ~ 2mm.
Further, the number of the described first thin grid be 50 ~ 200, the number of the second thin grid be 1 ~ 100, described the
The width of one thin grid and/or the second thin grid is 20 ~ 200um.
Preferably, the main grid is solid construction main grid, stagewise engraved structure main grid or stagewise solid construction main grid.
A kind of solar battery sheet, the front of the solar battery sheet is provided with described electrode grid line structure.
The present invention adopts above scheme, has the advantage that compared to existing technology：
The second thin grid are increased between first thin grid, and overall thin grid distribute as net shape, and two neighboring first thin grid are by therewith
Intersecting main grid and the second thin grid form latticed connection, the anelectrode overall distribution of solar battery sheet can be made reasonable, solution
Certainly resolve in the case of grid the collection problem of carrier and increase carrier collection rate, be conducive to collection of the cell piece to electric current, carry
Rise cell piece conversion efficiency.
Description of the drawings
Accompanying drawing 1 is the electrode grid line structure schematic diagram of existing three main grids solar battery sheet；
Accompanying drawing 2 is the electrode grid line structure schematic diagram of the embodiment of the present invention 1；
Accompanying drawing 3 is the electrode grid line structure schematic diagram of the embodiment of the present invention 2；
Accompanying drawing 4 is the electrode grid line structure schematic diagram of the embodiment of the present invention 3；
Accompanying drawing 5 is the electrode grid line structure schematic diagram of the embodiment of the present invention 4；
Accompanying drawing 6a be existing electrode grid line structure occur break grid when electric current flow to schematic diagram；
When accompanying drawing 6b occurs disconnected grid for the electrode grid line structure of the present invention, electric current flows to schematic diagram.
In above-mentioned accompanying drawing,
1st, cell piece front；2nd, main grid；3rd, the first thin grid；4th, the second thin grid.
Specific embodiment
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy
It is easier to be understood by the person skilled in the art.
Embodiment 1
In prior art, conventional solar battery sheet is three main grid solar battery sheets and four main grid solar battery sheets.With attached
As a example by the electrode grid line structure of three main grid solar battery sheets shown in Fig. 1, the electrode grid in the solar battery sheet front of routine
Line structure is constituted by three or four main grids 2 for being arranged on cell piece front 1 and multiple first thin grid 3 are intersecting.
The present invention provides a kind of five main grids, 2 solar battery sheet.Referring to shown in accompanying drawing 2, five main grid solar battery sheets are just
The electrode grid line structure in face is by being arranged on five main grids 2 in cell piece front 1, multiple first thin grid 3, multiple second thin grid, 4 structures
Become.
Five main grids 2 are parallel to each other and extend longitudinally respectively, and five main grids 2 are transversely arranged at equal intervals, adjacent main grid 2
Centreline spacing be 20 ~ 39cm, the width of each main grid 2 be.Main grid 2 is stagewise engraved structure main grid 2, i.e. main
Grid 2 are with multiple along its longitudinally spaced hollow out section for opening up.
The number of the first thin grid 3 is 50 ~ 200, and multiple first thin grid 3 are parallel to each other and extend transversely respectively, that is,
The central axis of the first thin grid 3 are said in the centrage of main grid 2, multiple first thin grid 3 are arranged at equal intervals along longitudinal direction.Each main grid
2 is intersecting with each first thin grid 3 in latticed so that each first thin grid 3 and main grid 2 are connected with each other conducting respectively, so as to by first
The photogenerated current that thin grid 3 are collected is transmitted to main grid 2.
The number of the second thin grid 4 is 1 ~ 100, and being connected with least one between two neighboring first thin grid 3 can be by the two phase
Connect the second thin grid 4 of conducting, that is to say, that the two ends of the second thin grid 4 respectively with the 3 intersecting connection of the two neighboring first thin grid,
So that the photogenerated current that one of them first thin grid 3 is collected can be transmitted to another the first thin grid 3 by the second thin grid 4.Second
The centrage of thin grid 4 is preferably parallel to the centrage of main grid 2.The width of the first thin grid 3 and the second thin grid 4 is 20 ~ 200um.
In the present embodiment, the second thin grid 4 are respectively connected between the adjacent first thin grid 3 of any two, in other words, own
The adjacent first thin grid 3 between be respectively connected with the second thin grid 4, two the first thin grid 3 of any one first thin grid 3 and its both sides are all
Connected by the second thin grid 4 respectively.The second thin grid 4 positioned at 3 opposite sides of the same first thin grid are staggeredly set, i.e. connection
The second thin grid 4 between i-th the first thin grid 3 of row and the first thin grid 3 of i+1 row be connected to the first thin grid 3 of i+1 row and
The second thin grid 4 between the first thin grid 3 of i+2 row are parallel and not conllinear, and wherein i=1,2...N-2, N are the number of the first thin grid 3,
N=50~200.
Additionally, being respectively provided with least in each square frame for being surrounded by the adjacent first thin grid 3 of two adjacent main grids 2 and two
The second thin grid 4 described in one.In structure as shown in Figure 2, there is in some square frames two the second thin grid 4, remaining side
Inframe then only has second thin grid 4.
Embodiment 2
Referring to the drawings shown in 3, the present embodiment substantially with embodiment 1, with differing only in for embodiment 1：
Main grid 2 adopts solid construction main grid 2.
Embodiment 3
Referring to the drawings shown in 4, the present embodiment substantially with embodiment 1, with differing only in for embodiment 1：
Main grid 2 adopt the solid mechanism's main grid 2 of stagewise, i.e. main grid 2 be dotted line interconnection system main grid 2, only with each first thin grid 3
Joint be solid dots structure.
Embodiment 4
Referring to the drawings shown in 5, the present embodiment is substantially with embodiment 1, and the difference with embodiment 1 is：
The second thin grid 4 are connected between the two neighboring first partial thin grid 3, between not all of adjacent first thin grid 3 all
It is connected with the second thin grid 4；But any one first thin grid 3 all at least with the first of its both sides the thin grid 3 in one by second thin
Grid 4 connect.
In addition to the electrode grid line structure that embodiment 1 is provided, the present invention can also take different-shape main grid 2 and different alternating to divide
The scheme of 4 quantity of the second thin grid of cloth, such as embodiment 2 ~ 4 crowd also for the electrode grid line structure in five main grid solar battery sheet fronts
Several in many designs.
In present solar battery sheet manufacturing process, the design of cell piece front electrode is essentially three main grids, four main grids
Form, adds the first thin grid 3 perpendicular to main grid and constitutes, and 2 spacing of main grid is still relatively large, under the same conditions, 2 spacing of main grid
Bigger, electric current carrying pathway is longer, and power attenuation is bigger.Pass through thin grid mainly due to the photoelectric current that cell piece is produced under light illumination
Transmission is collected to main grid 2, during transmitting to main grid 2, with the compound and thin grid metallic resistance of photogenerated current itself itself
Etc. reason, larger power attenuation is to a certain degree being generated.
On the other hand, design for existing front electrode, if there is grid phenomenon of breaking, photoelectric current is difficult to converge, collects
To main grid 2, by EL test being carried out to existing cell piece, can be clearly seen that the status transmission of photoelectric current, such as accompanying drawing 6a.Send out
Break at grid now, photoelectricity streaming is obstructed, and grid line is burnt out on grid line at disconnected grid by electron concentration, cause grid line at disconnected grid to send out
Black, cause product efficiency low, of poor quality.
In order to improve the transmission path of the electric current on cell piece surface, increase being effectively conducted for electric current, reduce power loss, reason
By above can by main grid 2 design more, less so as to realize 2 spacing of main grid, electric current is transmitted from thin grid then to be got over to the path of main grid 2
Short, power attenuation is then less, and battery conversion efficiency is higher, but for existing solar battery process condition, is not any master
2 quantity of grid all can achieve, and need to consider electrical property, silver paste consumption, series resistance, shading rate and assembly end welding pulling force, partially
The many factors such as the matchings such as shifting.
The present invention on the premise of each side factor is considered, in order to improve the transmission road of the electric current on cell piece surface
Footpath, increases being effectively conducted for electric current, reduces the impact that the grid that break are transmitted to electric current, and the present invention is by cell piece main grid and thin grid
Specification adjustment and distribution planning, design a kind of five main grid and combine the front electrode design that grid is distributed thin grid, and front electrode is removed
Have outside the thin grid of five main grids first, the second thin grid parallel to five main grids are also added, overall thin grid are in grid
Shape is distributed, and adjacent two parallel first thin grid form latticed connection by main grid normal thereto and the second thin grid, this design
The cell piece anelectrode overall distribution of silicon solar cell can be made reasonable, solve the problems, such as to resolve the collection of carrier in the case of grid
And increase carrier collection rate（As shown in fig. 6b）.What is more important, by the design of five main grids, optimizes the biography of electric current
Defeated path, improves short circuit current, while the series resistance of cell piece can be reduced, lifting cell piece conversion efficiency, and largely
The product quality for improving solaode.
To sum up, the electrode grid line structure of the present invention and the solar battery sheet with this electrode grid line structure have as follows
There is advantage：
Be conducive to collection of the cell piece to electric current, lift cell piece conversion efficiency；
Cell piece series resistance is advantageously reduced, reduces cell piece power loss；
Break impact of the grid to cell piece, Improving The Quality of Products and reliability can effectively be avoided.
Above-described embodiment technology design only to illustrate the invention and feature, are a kind of preferred embodiments, and its purpose exists
Present disclosure be will appreciate that in person skilled in the art and implement according to this, the protection of the present invention can not be limited with this
Scope.Equivalent transformation or modification that all spirit according to the present invention are made, should all cover protection scope of the present invention it
Interior.
Claims (10)
1. a kind of electrode grid line structure, it is characterised in that：Including multiple main grids for extending longitudinally respectively and multiple transversely
The the first thin grid for extending, the laterally spaced setting of the plurality of main grid, the longitudinally spaced setting of the multiple first thin grid, each institute
State main grid and each first thin grid intersect respectively in latticed so that conducting is connected with each other, connect between two neighboring first thin grid
Have at least one the two can be connected with each other the second thin grid of conducting.
2. electrode grid line structure according to claim 1, it is characterised in that：
The central axis of the first thin grid are in the centrage of the main grid；
And/or；
The centerline parallel of the second thin grid is in the centrage of the main grid.
3. electrode grid line structure according to claim 1, it is characterised in that：It is connected to i-th the first thin grid of row and i+1 row
The second thin grid and the second thin grid being connected between the thin grid of i+1 row first and i-th+2 the first thin grid of row between first thin grid
Parallel and not conllinear, wherein i=1,2 ... N-2, N are the number of the first thin grid.
4. electrode grid line structure according to claim 1, it is characterised in that：Each is by two adjacent main grids and two phases
The inframe that adjacent first thin grid are surrounded is respectively provided with the second thin grid described at least one.
5. electrode grid line structure according to claim 1, it is characterised in that：
The plurality of main grid is transversely arranged at equal intervals；
And/or；
The plurality of first thin grid are arranged at equal intervals along longitudinal direction.
6. electrode grid line structure according to claim 1, it is characterised in that：The electrode grid line structure is included described in five
Main grid.
7. electrode grid line structure according to claim 6, it is characterised in that：The centreline spacing of adjacent main grid be 20 ~
39cm, the width of the main grid is 0.1 ~ 2mm.
8. electrode grid line structure according to claim 7, it is characterised in that：The number of the first thin grid is 50 ~ 200,
The number of the second thin grid is 1 ~ 100, and the width of the first thin grid and/or the second thin grid is 20 ~ 200um.
9. electrode grid line structure according to claim 1, it is characterised in that：The main grid is solid construction main grid, segmentation
Formula engraved structure main grid or stagewise solid construction main grid.
10. a kind of solar battery sheet, it is characterised in that：The front of the solar battery sheet is arranged just like claim 1 ~ 9
Any one of electrode grid line structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611177571.8A CN106449804A (en) | 2016-12-19 | 2016-12-19 | Electrode grid line structure and solar battery piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611177571.8A CN106449804A (en) | 2016-12-19 | 2016-12-19 | Electrode grid line structure and solar battery piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106449804A true CN106449804A (en) | 2017-02-22 |
Family
ID=58215046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611177571.8A Pending CN106449804A (en) | 2016-12-19 | 2016-12-19 | Electrode grid line structure and solar battery piece |
Country Status (1)
| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054228A (en) * | 2017-12-11 | 2018-05-18 | 杭州博阳太阳能科技有限公司 | A kind of solar cell module and its manufacturing method |
| CN111200027A (en) * | 2018-11-19 | 2020-05-26 | 财团法人工业技术研究院 | Solar cell and electrode structure thereof |
| CN113594273A (en) * | 2021-08-27 | 2021-11-02 | 浙江晶科能源有限公司 | Battery piece and photovoltaic module |
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| CN104882497A (en) * | 2015-06-05 | 2015-09-02 | 中利腾晖光伏科技有限公司 | Grid-shaped electrode solar cell |
| CN205685945U (en) * | 2016-06-14 | 2016-11-16 | 常州天合光能有限公司 | The solaode anelectrode half tone of anti-breaking grid |
| CN205723559U (en) * | 2016-03-28 | 2016-11-23 | 无锡德鑫太阳能电力有限公司 | The solar battery sheet of novel electrode structure |
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Patent Citations (5)
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| CN203242641U (en) * | 2013-05-09 | 2013-10-16 | 英利能源（中国）有限公司 | Solar cell grating line electrode, solar cell and solar cell panel |
| CN204614794U (en) * | 2015-05-22 | 2015-09-02 | 协鑫集成科技股份有限公司 | solar battery sheet |
| CN104882497A (en) * | 2015-06-05 | 2015-09-02 | 中利腾晖光伏科技有限公司 | Grid-shaped electrode solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108054228A (en) * | 2017-12-11 | 2018-05-18 | 杭州博阳太阳能科技有限公司 | A kind of solar cell module and its manufacturing method |
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| CN113594273A (en) * | 2021-08-27 | 2021-11-02 | 浙江晶科能源有限公司 | Battery piece and photovoltaic module |
| CN113594273B (en) * | 2021-08-27 | 2023-08-15 | 浙江晶科能源有限公司 | Battery piece and photovoltaic module |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang Changkun Industrial Park Teng Hui Road No. 1 Applicant after: Suzhou Tenghui Photovoltaic Technology Co., Ltd. Address before: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang Changkun Industrial Park Teng Hui Road No. 1 Applicant before: Zhongli Talesun Solar Technology Co., Ltd. |
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Application publication date: 20170222 |