CN103000710B - A kind of solar cell - Google Patents
A kind of solar cell Download PDFInfo
- Publication number
- CN103000710B CN103000710B CN201210572780.8A CN201210572780A CN103000710B CN 103000710 B CN103000710 B CN 103000710B CN 201210572780 A CN201210572780 A CN 201210572780A CN 103000710 B CN103000710 B CN 103000710B
- Authority
- CN
- China
- Prior art keywords
- gate line
- main gate
- solar cell
- hollow out
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of solar cell, comprise many main gate line and many thin grid lines, on an extinction face of solar cell, comprise at least one hollow out main gate line and at least one solid main gate line, described solid main gate line and welding are electrically connected.Relative to resistance dense-grid solar cell of the prior art, solar cell provided by the invention had both comprised solid main gate line and had also comprised hollow out main gate line, wherein, solid main gate line and welding are electrically connected, ensure that the welding pulling force needed for solar module, and the existence of hollow out main gate line, both ensure that the quantity of main gate line, reduce series resistance, in turn save slurry, reduce the production cost of solar cell, solar cell provided by the invention can when ensureing that the welding pulling force of solar module does not reduce, the production cost of effective reduction solar cell.
Description
Technical field
The present invention relates to technical field of solar batteries, particularly relate to a kind of solar cell.
Background technology
Current crystal silicon solar energy battery industrial technology is very ripe, but compared with conventional energy resource, relatively high cost and lower photoelectric conversion efficiency constrain the development of photovoltaic industry, and for how to reduce costs and to improve photoelectric conversion efficiency, people have carried out large quantifier elimination.
Wherein resistance dense-grid technique is exactly the developing direction that solar cell improves photoelectric conversion efficiency.Described high resistant refers to that diffused sheet resistance is comparatively large, and diffused sheet resistance is larger, and few sub fewer in surface recombination, short circuit current is larger, thus photoelectric conversion efficiency is higher.
But in actual fabrication process, inventor finds, the performance of the solar cell that resistance dense-grid technique is produced still has much room for improvement.
Summary of the invention
The invention provides a kind of solar cell, on the basis of welding pulling force not reducing solar module, the production cost of solar cell can be reduced.
In order to solve the problem, the invention provides a kind of solar cell, comprise many main gate line and many thin grid lines, on an extinction face of solar cell, comprise at least one hollow out main gate line and at least one solid main gate line, described solid main gate line and welding are electrically connected.
Preferably, the number of described main gate line is at least three.
Preferably, the number of described solid main gate line is 2.
Preferably, described hollow out main gate line is positioned at the centre of two solid main gate line.
Preferably, the width of described hollow out main gate line is less than the width of solid main gate line.
Preferably, the width of described hollow out main gate line is 0.1mm ~ 2mm, comprises endpoint value.
Preferably, the width of described solid main gate line is 2mm ~ 3mm, comprises endpoint value.
Preferably, the material of described main gate line is silver.
From such scheme, solar cell provided by the invention, comprise many main gate line, both comprise solid main gate line in many main gate line and also comprise hollow out main gate line, described solid main gate line and welding are electrically connected, relative to resistance dense-grid solar cell of the prior art, when ensureing that the welding pulling force of solar module does not reduce, can effectively reduce the production cost of solar cell.
Accompanying drawing explanation
The solar battery front side schematic diagram that Fig. 1 provides for the embodiment of the present invention one;
A kind of solar battery front side schematic diagram that Fig. 2 provides for the embodiment of the present invention two;
The another kind of solar battery front side schematic diagram that Fig. 3 provides for the embodiment of the present invention two;
A kind of solar cell hollow out main gate line close-up schematic view that Fig. 4 provides for the embodiment of the present invention two;
The another kind of solar cell hollow out main gate line close-up schematic view that Fig. 5 provides for the embodiment of the present invention two.
Embodiment
As described in background, the performance of the solar cell that resistance dense-grid technique of the prior art is produced still has much room for improvement, inventor finds after deliberation, the solar cell that resistance dense-grid technique is formed, with the increase of diffused sheet resistance, the contact resistance of metal paste and silicon chip itself can be increased simultaneously, thus increase series resistance, in prior art, usually reduce series resistance by the quantity increasing main gate line.But the printing slurry due to the main gate line of solar battery front side is generally silver slurry, increase the quantity of main gate line, the consumption of silver slurry will inevitably be increased, thus the production cost of solar cell can be increased, for reducing the consumption of printing main gate line silver slurry used, reduce the production cost of solar cell, all main gate line of solar battery front side are made Openworks shape, but the use of hollow out main gate line, can reduce the welding pulling force of solar module, increase the decay of solar module.
Based on this, the invention provides following scheme:
A kind of solar cell, comprise many main gate line and many thin grid lines, on an extinction face of solar cell, comprise at least one hollow out main gate line and at least one solid main gate line, described solid main gate line and welding are electrically connected.
From above-mentioned technical scheme, solar cell provided by the invention, comprise solid main gate line and hollow out main gate line, wherein, solid main gate line and welding are electrically connected, ensure that the welding pulling force needed for solar module, and the existence of hollow out main gate line, both ensure that the quantity of main gate line, reduce series resistance, in turn save slurry, reduce the production cost of solar cell, namely solar cell provided by the invention on the basis of welding pulling force not reducing solar module, can fall the production cost of low solar cell.
It is more than the core concept of the application, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
Secondly, the present invention is described in detail in conjunction with schematic diagram, when describing the embodiment of the present invention in detail; for ease of explanation; represent that the profile of device architecture can be disobeyed general ratio and be done partial enlargement, and described schematic diagram is example, it should not limit the scope of protection of the invention at this.In addition, the three-dimensional space of length, width and the degree of depth should be comprised in actual fabrication.
Embodiment one
The solar cell that the embodiment of the present invention provides, as shown in Figure 1, comprise many thin grid lines 11 and many main gate line 12, on an extinction face of solar cell, comprise at least one hollow out main gate line 121 and at least one solid main gate line 122, described solid main gate line and welding are electrically connected.
It should be noted that, solar cell in the embodiment of the present invention can be one side solar cell, namely solar cell only has one side for extinction face, also be the front of solar cell, then at least one hollow out main gate line and at least one solid main gate line are positioned at the front of described solar cell, and solid main gate line and welding are electrically connected and solar battery sheet are coupled together formation solar module.
Solar cell in the embodiment of the present invention can also be double-sided solar battery, namely the tow sides of solar cell are all for absorbing sunray, then described at least one hollow out main gate line and at least one solid main gate line are positioned on an extinction face of described double-sided solar battery, or two of double-sided solar battery faces comprise all simultaneously the solid main gate line that at least one hollow out main gate line and at least one and welding be electrically connected.
When there is described hollow out main gate line and solid main gate line on an extinction face of double-sided solar battery, main gate line on another extinction face of double-sided solar battery does not limit, it can be main gate line of the prior art, also can for the main gate line in the present invention, in actual production, be preferably the design that the present invention comprises hollow out main gate line and solid main gate line.
In prior art, because on solar cell extinction face, the size of grid line area decides the consumption of metal paste, the grid line metal paste of general solar cell is silver paste simultaneously, also be in solar cell cost, occupy the larger part of non-silicon cost proportion, at present in order to save the consumption of metal electrode sizing, reduce the production cost of solar cell, adopt discontinuous pattern printing to form hollow out main gate line in main gate line position, the consumption of slurry creates obvious effect, greatly reduces the production cost of solar cell.But in prior art, the length of welding is generally about 2 times of the cell piece length of side, be connected with whole piece main gate line, therefore the openwork part of hollow out main gate line does not have metal to weld with welding, hollow out and non-hollow out junction section and welding not prison welding, make assembly in use there is comparatively serious relaxation phenomenon, namely hollow out main gate line reduces the welding pulling force of solar module, adds the decay of assembly.
The solar cell provided in the present embodiment, comprise hollow out main gate line and solid main gate line simultaneously, solid main gate line forms assembly for connecting each solar battery sheet, can ensure that the welding pulling force of solar module reduces the decay in the use procedure of assembly later stage simultaneously; And hollow out main gate line can reduce the printing consumption of main gate line, thus reduce the production cost of solar cell.The solar cell that the present embodiment provides, not reducing welding pulling force, not increasing on the basis of assembly decay, adopts hollow out main gate line, reduces the production cost of solar cell.
And relative to full hollow out main gate line, there is no and just improve the production cost increasing too much solar cell the welding pulling force of solar module, reduce the decay of assembly, thus be conducive to the product quality improving solar module.
Embodiment two
With a upper embodiment unlike, the present embodiment is only for one side solar cell, describe in detail the present invention, certainly, this be not limit the solution of the present invention can only be applicable to one side solar cell, under the prerequisite not paying creative work, the solar cell that can also provide according to the present embodiment obtains other schemes.
The solar cell that the present embodiment provides is one side solar cell, as shown in Figure 2, comprise many thin grid lines 21 and at least three main gate line 22 in the front of solar cell, two in described main gate line is solid main gate line 221, and all the other main gate line are hollow out main gate line 222.
Inventor finds, along with resistance dense-grid technique becomes a developing direction of solar cell, the diffusion resistance of solar cell is increasing, series resistance is also increasing, be unfavorable for the conversion efficiency improving solar cell, and be reduce the contact resistance of metal paste and silicon chip itself by the quantity of increase main gate line in prior art, thus reduce the series resistance of solar cell, the fill factor, curve factor of raising solar cell, and then improve the conversion efficiency of solar cell.But under normal circumstances, the material of described main gate line is silver, for reducing the production cost of solar cell, general employing discontinuous pattern printing forms hollow out main gate line, greatly can save the amount of printing slurry like this, but the openwork part due to hollow out main gate line does not have metal to weld with welding, hollow out and non-hollow out junction section and welding not prison welding, make assembly in use there is comparatively serious relaxation phenomenon.
And the present embodiment comprises two solid main gate line, the solar battery sheet of monolithic, all for connection welding belt, is connected to form solar module by described two solid main gate line, and solid main gate line number is less on the one hand, does not too much increase the consumption of slurry; On the other hand, solid main gate line is welded with welding, can not affect the welding pulling force of solar module, effectively alleviate the decay of assembly.
In the present embodiment, the number of preferred solid main gate line is two, the solar module welding pulling force that so wherein welding occurs because of rosin joint or not prison welding reduces, then also have another welding to connect, the phenomenon occurring assembly decay in solar module use procedure can be avoided.
It should be noted that, because solid main gate line is mainly used in being connected with welding, improve the welding pulling force of solar module, and hollow out main gate line is not necessarily connected with welding, therefore, the width of described hollow out main gate line is less than the width of solid main gate line, in the present embodiment preferably, the width of described hollow out main gate line is 0.1mm ~ 2mm, comprises endpoint value; The width of described solid main gate line is 2mm ~ 3mm, comprises endpoint value.
The solar cell provided in the present embodiment, the arrangement of hollow out main gate line and solid main gate line does not limit, as shown in Figure 2, solid main gate line can be distributed in the both sides of hollow out main gate line, also solid main gate line can be distributed in the centre position of solar cell, as shown in Figure 3, hollow out main gate line is distributed in the both sides of solid main gate line, for the ease of the welding of solar battery sheet in the present embodiment, preferably hollow out main gate line is placed in the centre of described two solid main gate line, namely two solid main gate line be connected with welding are near the edge of every sheet solar cell.
In addition, in the present embodiment, two solid main gate line are connected with welding, do not represent that hollow out main gate line is not connected with welding, described hollow out main gate line can be connected with welding, also can not be connected with welding, not limit at this, but in the present embodiment be preferably hollow out main gate line be not connected with welding.
The hollow out figure of hollow out main gate line is not limited in the present embodiment, hollow out main gate line can be the main gate line with periodic pore, be illustrated in figure 4 the hollow out main gate line partial enlarged drawing with periodic pore, comprise thin grid line 41 and the hollow out main gate line 42 with periodic pore 43, control the period distances distance between the size of hole and hole, when not affecting photoelectric current and collecting, reduce the production cost of solar cell as far as possible, reduce the shading-area in solar cell extinction face, thus improve the conversion efficiency of solar cell, described hollow out main gate line also can be that only near the test probe contact point of solar cell IV test, printing silver is starched, the main gate line of hollow out in the middle part of other parts, be illustrated in figure 5 the described hollow out main gate line partial enlarged drawing that only printing silver is starched near the test probe contact point of solar cell IV test, main gate line 52 is the hollow out main gate line comprising test probe contact point 53, wherein only around test probe contact point 53, be printed with metal paste, this solar cell can when not affecting solar cell IV test and classify and assembly power output, reduce the use amount of silver slurry.
The solar cell that above the present embodiment provides, comprise hollow out main gate line and solid main gate line simultaneously, solid main gate line forms assembly for connecting each solar battery sheet, can ensure that the welding pulling force of solar module reduces the decay in the use procedure of assembly later stage simultaneously; And the use of hollow out main gate line, greatly reduce the printing consumption of main gate line silver slurry, thus reduce the production cost of solar cell, also the solar cell that namely the present embodiment provides on the basis of welding pulling force not reducing solar module, can reduce the production cost of solar cell.
The present embodiment only describes in detail for one side solar cell; for those skilled in the art when not paying creative work; the present embodiment is applied to double-sided solar battery be also fine; therefore; within the spirit and principles in the present invention all, any amendment made all falls into protection scope of the present invention.
It should be noted that, usually silk-screen printing technique printing is adopted to form thin grid line and main gate line in prior art, its key step is: placed on the table by silicon chip, again printing screen plate is placed in above silicon chip, drive adhesive tape to print on printing screen plate along certain orientation by printing fixture, utilize adhesive tape to apply external force to the slurry of adhesive tape side, extruding slurry, slurry is sticked on described silicon chip by the mesh of printing screen plate, completes one-step print operation.
As can be seen from above-mentioned silk-screen printing technique step, print and form certain figure, need printing screen plate corresponding with it, hollow out main gate line is also comprised owing to not only comprising solid main gate line in the present invention, and solid main gate line and hollow out main gate line are present on an extinction face of solar cell simultaneously, therefore in silk-screen printing technique, the printing screen plate printing thin grid line and main gate line also needs to change accordingly according to printed pattern, wherein, printing screen plate is continuous print printed patterns for printing solid main gate line part, printing screen plate is discrete printed patterns for printing hollow out main gate line part, simultaneously, in the present embodiment, the layout of solid main gate line and hollow out main gate line also can change according to actual needs, therefore printing screen plate also should adjust according to need of production.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a solar cell, it is characterized in that, comprise at least three main gate line and many thin grid lines, on an extinction face of solar cell, comprise at least one hollow out main gate line and two solid main gate line, described two solid main gate line and welding are electrically connected, and described hollow out main gate line is positioned at the centre of described two solid main gate line.
2. solar cell according to claim 1, is characterized in that, the width of described hollow out main gate line is less than the width of solid main gate line.
3. solar cell according to claim 2, is characterized in that, the width of described hollow out main gate line is 0.1mm ~ 2mm, comprises endpoint value.
4. solar cell according to claim 3, is characterized in that, the width of described solid main gate line is 2mm ~ 3mm, comprises endpoint value.
5. solar cell according to claim 1, is characterized in that, the material of described main gate line is silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210572780.8A CN103000710B (en) | 2012-12-24 | 2012-12-24 | A kind of solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210572780.8A CN103000710B (en) | 2012-12-24 | 2012-12-24 | A kind of solar cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103000710A CN103000710A (en) | 2013-03-27 |
| CN103000710B true CN103000710B (en) | 2016-01-13 |
Family
ID=47929062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210572780.8A Active CN103000710B (en) | 2012-12-24 | 2012-12-24 | A kind of solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103000710B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931245A (en) * | 2012-11-28 | 2013-02-13 | 山东力诺太阳能电力股份有限公司 | Solar cell front face grid line and solar cell sheet printed with same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005093855A1 (en) * | 2004-03-29 | 2005-10-06 | Kyocera Corporation | Solar cell module and photovoltaic power generator using this |
| CN102184973B (en) * | 2010-11-11 | 2013-02-13 | 浚鑫科技股份有限公司 | Positive electrode structure of solar battery plate |
| CN102130197A (en) * | 2010-12-31 | 2011-07-20 | 常州天合光能有限公司 | Light-reflecting low-resistance crystalline silicon solar cell assembly and connection welding belt thereof |
| CN202076273U (en) * | 2011-04-30 | 2011-12-14 | 常州天合光能有限公司 | Crystalline silicon solar cell main grid structure |
| CN202523721U (en) * | 2012-03-07 | 2012-11-07 | 上海超日太阳能科技股份有限公司 | Positive grid line electrode structure of improved crystalline silicon cell |
| CN202502998U (en) * | 2012-05-25 | 2012-10-24 | 包头市山晟新能源有限责任公司 | Solar cell and solar cell panel |
| CN102800712B (en) * | 2012-07-16 | 2015-09-30 | 杭州塞利仕科技有限公司 | A kind of solar battery sheet electrode structure at right side and preparation method thereof |
-
2012
- 2012-12-24 CN CN201210572780.8A patent/CN103000710B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931245A (en) * | 2012-11-28 | 2013-02-13 | 山东力诺太阳能电力股份有限公司 | Solar cell front face grid line and solar cell sheet printed with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103000710A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102810578B (en) | A kind of solar cell and main gate line thereof | |
| CN201838602U (en) | Crystalline silicon solar battery with segmented grid lines | |
| CN203752663U (en) | Solar cell front electrode screen printing plate | |
| CN101609848B (en) | Front and back surface electrodes of screen printing crystalline silicon solar cell and manufacturing method thereof | |
| WO2015003600A1 (en) | Mwt solar battery | |
| JP7209720B2 (en) | Solar cell arrays and photovoltaic modules | |
| CN203617305U (en) | Grid line structure of solar cell | |
| CN208781860U (en) | More main grid solar battery sheets | |
| CN102544128B (en) | Solar cell | |
| CN206460964U (en) | A kind of many main grid high efficiency solar cell pieces | |
| CN202839626U (en) | Grid lines of solar cell slice | |
| CN103000710B (en) | A kind of solar cell | |
| CN204991723U (en) | Solar cell electrode | |
| CN203085565U (en) | Novel solar battery positive electrode | |
| CN103545386A (en) | Solar cell electrode shape | |
| CN203134814U (en) | A photovoltaic battery piece having hollowed-out main grid line electrodes and a photovoltaic assembly | |
| CN107146822B (en) | Solar cell capable of being connected at will without broken grid | |
| CN203607433U (en) | Solder strip capable of improving welding effect and photovoltaic assembly packaging power | |
| CN202549856U (en) | Back electrode structure of crystalline silicon cell | |
| CN204659172U (en) | There is the battery screen printing plate of main grid engraved structure | |
| CN204760394U (en) | Solar cell positive electrode and solar cell | |
| CN204760393U (en) | MWT solar cell's positive electrode structure | |
| CN204271092U (en) | A kind of crystal silicon solar battery component electrode and solar module | |
| CN210467856U (en) | Solar cell for non-shielding component packaging technology | |
| CN208889668U (en) | A kind of silicon-based solar cell structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shi Jinchao Inventor after: Song Dengyuan Inventor after: Zhang Lei Inventor after: Wang Jing Inventor after: Zhao Xueling Inventor after: Zhang Xiaopan Inventor after: Li Qian Inventor after: Wu Cuigu Inventor before: Fan Zhidong Inventor before: Wang Jing Inventor before: Zhao Xueling Inventor before: Zhang Xiaopan Inventor before: Li Qian |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |