CN104332506B - Photovoltaic cell and printing screen plate used for printing gate lines of photovoltaic cell - Google Patents
Photovoltaic cell and printing screen plate used for printing gate lines of photovoltaic cell Download PDFInfo
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- CN104332506B CN104332506B CN201410526022.1A CN201410526022A CN104332506B CN 104332506 B CN104332506 B CN 104332506B CN 201410526022 A CN201410526022 A CN 201410526022A CN 104332506 B CN104332506 B CN 104332506B
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- 238000007639 printing Methods 0.000 title claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000007650 screen-printing Methods 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000010970 precious metal Substances 0.000 abstract description 2
- 238000003491 array Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 26
- 238000000034 method Methods 0.000 description 16
- 239000002002 slurry Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 229910000510 noble metal Inorganic materials 0.000 description 8
- 230000005611 electricity Effects 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013082 photovoltaic technology Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241001323321 Pluto Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 241000710779 Trina Species 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229940029985 mineral supplement Drugs 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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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
- H01L31/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/34—Screens, Frames; Holders therefor
- B41F15/36—Screens, Frames; Holders therefor flat
-
- 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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- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
The invention relates to the technical field of a photovoltaic assembly, and particularly relates to a photovoltaic cell and a printing screen plate used for printing the gate lines of the photovoltaic cell. The light-receiving surface of the photovoltaic cell is provided with the gate lines. The cross section of the fine gate lines decreases with increasing distance of electrical connection points with the closest spacing distance. The fine gate lines arranged between the two adjacent electrical connection points are provided with pre-breaking gates. The printing screen plate used for printing the gate lines comprises a wire screen plate and a metal plate screen plate. The wire screen plate is matched with the change of the cross section of the fine gate lines via adjusting spacing distance and diameter of longitudinal screen wires. Transparent rate of the screen plate hole arrays of the metal plate screen plate is adjusted so that the change of the cross section of the fine gate lines is realized. The beneficial effects of the invention are that use amount of precious metal for manufacturing the gate lines is greatly reduced without reducing current collection capability or product quality. Besides, the pre-breaking gates are used, and defects like broken gates only occur at the predesigned positions so that influence of the defects is controlled and reliability and safety of the photovoltaic cell are greatly enhanced.
Description
Technical field
The present invention relates to photovoltaic module technical field, a kind of photovoltaic cell and for printing its grid line
Printing screen plate.
Background technology
Since 2004, China's photovoltaic cell manufacture and application fast development.At present, China is not only complete
The photovoltaic of ball first manufactures big country, also has become as the photovoltaic market that the whole world is maximum simultaneously.Following photovoltaic generation
Holding is grown at top speed by manufacture and the application of product.Precious metals ag as the core material in photovoltaic cell product,
Obtain the huge concern of industrial circle always.In the Europe difference such as photovoltaic technology meeting, Shanghai photovoltaic technology exhibition
Occasion, the technical specialist of photovoltaic circle such as Martin Green illustrates and can following Ag yield be met photovoltaic
The worry of development.Reduce Ag use consumption in the photovoltaic cells, find simultaneously and can replace or part replacement
The battery electrode design of Ag, becomes the common recognition of photovoltaic industry expert.Middle electricity electrically (Nanjing) photovoltaic is public
In the utility model patent CN 203250753U of department, fairly simple clearly describe existing electrode design skill
Art.
At present the research direction of industry mainly has 5: 1) the silver slurry public affairs as representative with Du Pont and load forces scholar company
Department, mainly to reduce the Ag consumption in silver slurry, prints thin for Ag grid line more " tall and thin " simultaneously.2)
Photovoltaic module manufacturer with Trina Solar etc. as representative, mainly reduces in silk screen printing Ag in main gate line and uses
Amount.Such as utility model patent ZL200920041761.6 and the utility model patent that improves on this basis
CN202076273U, is by reducing the method that main grid silver slurry consumption saves Ag consumption.3) with Shang De
Electric power is the photovoltaic module manufacturer of representative, uses " Pluto " technology, namely uses Ni/Cu/Sn tri-
The mode of layer plating thin conduction grid line.Owing to plating requires height to the post processing of environmental conservation, weldability is deposited
In technical difficulty, need to invest the reasons such as new equipment, it is difficult to introduce to the market.4) with companies such as Hitachi's chemical conversions it is
Represent, it is intended to partly replace the conductive silver paste under photovoltaic cell main gate line by conducting film (CF) film.5)
With Japanese industries comprehensive study institute (AIST) as representative, it is intended to replace Ag by conductive copper slurry and starch, this
The research in one direction has the most just started starting.
In these 5 kinds of modes, the 1st) and the 2nd) plant method, the most widely used.Other are several
Still among attempting.No matter take which kind of mode, its main target be all meet photovoltaic cell harsh can
In the case of requiring by property, reduce cost to greatest extent.
Summary of the invention
The technical problem to be solved is: reduce the consumption of the noble metal of photovoltaic cell.
The technical solution adopted for the present invention to solve the technical problems is: a kind of photovoltaic cell, at cell piece
Sensitive surface has grid line, and grid line is made up of main gate line and thin grid line, and thin grid line has the contact that is electrically connected, thin grid
Line is electrically connected with interconnecting strip by main gate line in the junction that is electrically connected, and is electrically connected contact more apart from immediate
Far, the sectional area of thin grid line is the least, and the distance at this does not refer to that the distance of air line distance spatially refers to
The distance of electric current carrying pathway, the trend that sectional area reduces is continuous print or discontinuous transition, and thin grid
Line reduces the sectional area of thin grid line by reducing the height of thin grid line；Or described grid line is only by thin grid line
Constituting, thin grid line is directly electrically connected with interconnecting strip, apart from the immediate contact that is electrically connected in the junction that is electrically connected
The most remote, the sectional area of thin grid line is the least, and the trend that sectional area reduces is continuous print or discontinuous transition, and
And carefully grid line reduces the sectional area of thin grid line by reducing the height of thin grid line.
Limit further, adjacent two the thin grid lines being electrically connected between contact have and prejudges grid.
Limiting further, the width prejudging grid is D, 0mm ＜ D≤3mm.
Limit further, prejudge grid and be positioned at the centre position of thin grid line.
Limiting further, when grid line is only made up of thin grid line, the quantity of interconnecting strip is 18～50.
Limiting further, interconnecting strip is electrically connected by the way of welding or conducting resinl bonding.
For realizing the design of above-mentioned grid line, the present invention provides a kind of photovoltaic cell screen printing screens, including net
Version skeleton and the silk screen being fixed on half tone skeleton, silk screen is by interlaced horizontal twine and longitudinal twine structure
Become, silk screen is formed by the way of mask film covering open-work district and the mask regions of printing grid line, open-work district
Consistent with the bearing of trend of horizontal twine for printing the bearing of trend in the Xi Shan open-work district of thin grid line, horizontal net
Interval between the diameter of silk and laterally twine is identical, in Xi Shan open-work district, between longitudinal twine between
Every identical, longitudinal diameter of twine is inversely proportional to the sectional area of thin grid line to be printed；Or longitudinal twine
Diameter is identical, and the interval between longitudinal twine is directly proportional to the sectional area of thin grid line to be printed；Or longitudinally
The diameter of twine is inversely proportional to the sectional area of thin grid line to be printed, simultaneously the interval between longitudinal twine with treat
The sectional area of the thin grid line of printing is directly proportional.
For realizing the design of above-mentioned grid line, the present invention additionally provides a kind of photovoltaic cell metal sheet printing half tone,
Including metallic plate, offer the half tone opening array being made up of half tone perforate on a metal plate, in half tone perforate battle array
By the way of mask film covering, form the printing open-work district of grid line and mask regions on row, open-work district be used for print
Brush in the Xi Shan open-work district of thin grid line, the Penetration ration of half tone opening array and the sectional area of thin grid line to be printed
It is directly proportional.
Limiting further, half tone perforate is simple geometry figure, is preferably oval or rectangle.
The invention has the beneficial effects as follows: while not reducing electric current collection ability and photovoltaic products quality, greatly
Amplitude lowers the usage amount of the noble metal making grid line.Secondly, the defects such as disconnected grid are facilitated only to go out by prejudging grid
The position being pre-designed now, thus control the impact of defect, it is greatly promoted reliability and the peace of photovoltaic cell
Quan Xing.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings；
Fig. 1 is the overall structure schematic diagram of the grid line of current photovoltaic cell；
Fig. 2 is the top view after the thin grid line ratio exaggeration in Fig. 1；
Fig. 3 is the side view after the thin grid line ratio exaggeration in Fig. 1；
Fig. 4 is the overall structure schematic diagram of the grid line of embodiments of the invention 1 photovoltaic cell；
Fig. 5 is the top view after the thin grid line ratio exaggeration of embodiments of the invention 1；
Fig. 6 is the side view after the thin grid line ratio exaggeration of embodiments of the invention 1；
Fig. 7 is the top view after the thin grid line ratio exaggeration of embodiments of the invention 2；
Fig. 8 is the top view after the thin grid line ratio exaggeration of embodiments of the invention 3；
Fig. 9 is the side view after the thin grid line ratio exaggeration of embodiments of the invention 3；
Figure 10 be the different radicals of the present invention interconnecting strip under the electricity fed distance of thin grid line and saving containing Ag slurry
Save the graph of a relation of the upper limit；
Figure 11 a is the partial enlarged drawing of the first screen mesh printing plate before the mask process of the present invention；
Figure 11 b is the partial enlarged drawing of the first screen mesh printing plate after the mask process of the present invention；
Figure 11 c is the partial enlarged drawing of the second screen mesh printing plate of the present invention；
Figure 11 d is the partial enlarged drawing of the 4th kind of screen mesh printing plate of the present invention；
Figure 12 a is the partial enlarged drawing of the first the metallic plate half tone before the mask process of the present invention；
Figure 12 b is the partial enlarged drawing of the first the metallic plate half tone after the mask process of the present invention；
Figure 12 c is the partial enlarged drawing of the second metallic plate half tone before the mask process of the present invention；
Figure 12 d is the partial enlarged drawing of the second metallic plate half tone after the mask process of the present invention；
Figure 12 e is the partial enlarged drawing of the third metallic plate half tone before the mask process of the present invention；
Figure 12 f is the partial enlarged drawing of the third metallic plate half tone after the mask process of the present invention；
In figure, 1. thin grid line, 2. main gate line, 3. interconnecting strip, 4. prejudge grid, 5. horizontal twine, 6. longitudinal network
Silk, 7. mask, 7-1. forms the mask prejudging grid, 8. Xi Shan open-work district, 9. metallic plate, 10. half tone perforate.
Detailed description of the invention
The core of the present invention is to use the photovoltaic cell sensitive surface grid line design of a kind of non-homogeneous formula, is not reducing
While electric current collection ability and photovoltaic products quality, significantly lower the noble metal (generally Ag) making grid line
Usage amount.It is most at the noble metal dosage of the thin grid line 1 of the junction that is electrically connected near grid line and interconnecting strip 3,
Electric conductivity is best.Noble metal at the thin grid line 1 of the electric current collection end section farthest away from the contact that is electrically connected is used
Measuring relatively minimal, electric conductivity is the most weak.Closest to being electrically connected contact and farthest away from the thin grid being electrically connected between contact
The gradually transition of the noble metal dosage of line 1.
Below on the basis of introducing existing electrode design, the feature of the comparative illustration present invention.
Common photovoltaic cell is usually 125 × 125mm or two kinds of specifications of 156 × 156mm, main gate line 2
It is typically designed to 2～5.Fig. 1,2 and 3 give the typical grid line design of existing general photovoltaic cell.
The specification of photovoltaic cell is 156 × 156mm in FIG, and the sensitive surface of this photovoltaic cell has 3 main gate line
2, and 60～80 width are 30～120um, height is the thin grid line 1 of 15～30um, and thin grid line be uniformly to divide
Cloth designs.Main gate line 2 and thin grid line 1 are transferred to photovoltaic cell by the slurry containing Ag by the way of silk screen printing
Sensitive surface, then at a temperature of 500～900 DEG C, high temperature sintering forms.This containing Ag slurry typically by leading
Electricity phase Ag powder, inorganic binder frit, organic carrier and improve battery performance trace mineral supplement composition,
Complicated process of preparation, price is high.For reducing the cost of sizing agent Han Ag, usual main gate line 2 containing Ag slurry
Formula can reduce and measure containing Ag, and by the way of hollow out, reduce cost.Interconnecting strip 3 is by welding or leads
The mode of electricity glue bond is electrically connected with thin grid line 1 in the junction that is electrically connected by main gate line 2, interconnecting strip 3
Including copper and tin welding, copper and indium welding.
Embodiment 1, such as Fig. 4, shown in 5 and 6:
A kind of photovoltaic cell, the sensitive surface at cell piece has grid line, and grid line is only made up of thin grid line 1, saves
Slightly main gate line 2, thin grid line 1 has the contact that is electrically connected, and thin grid line 1 is direct and interconnecting strip 3 in the junction that is electrically connected
Being electrically connected, the quantity of interconnecting strip 3 is 18～50, and in the drawings, the radical of interconnecting strip 3 is 22.
The Ag consumption cost of the main gate line 2 saved accounts for photovoltaic cell 1/3 containing Ag cost of sizing agent, is one and significantly enters
Step.
For the design of 3 main gate line 2, the transmission range of thin grid line 1 is 52mm；For 22 interconnections
The design of bar 3, the transportation range of thin grid line 1 is 7mm.Reach same transmittability, leading of thin grid line 1
Electricity bearing capacity requires to reduce 8 times.For the design of 30 interconnecting strip 3, the transportation range of thin grid line 1
For 3.9mm, the conduction bearing capacity of thin grid line 1 requires to reduce 10 times.The current capacity quilt of this part
It is transferred directly in interconnecting strip 3, has been equivalent to the grid line using interconnecting strip 3 to instead of noble metal material.Aobvious
Interaction containing Ag usage of sizing agent is shown in Figure 10 by the design writing many interconnecting strip 3.
The most remote apart from the immediate contact that is electrically connected, the sectional area of thin grid line 1 is the least so that electric current collection end
The noble metal dosage of the thin grid line 1 of part is relatively minimal, can save the consumption of Ag in a large number.In this embodiment
In, the width of the thin grid line 1 of photovoltaic cell is consistent, with existing photovoltaic cell in Fig. 1,2 and 3
Thin grid line 1 be designed without difference, thin grid line 1 reduces thin grid line 1 by reducing the height of thin grid line 1
Sectional area, the most remote apart from the immediate contact that is electrically connected, the height of thin grid line 1 is the least, becoming of height reduction
Gesture can be with right and wrong continuous transition.The design of thin grid line 1 and the thin grid line 1 of existing photovoltaic cell design phase
Ratio can save about about 10% Ag consumption.
Embodiment 2, as it is shown in fig. 7,
Compare with embodiment 1, the width of the thin grid line 1 of photovoltaic cell and be the most all inconsistent, thin grid
Line 1 reduces the sectional area of thin grid line 1 by the height and width reducing thin grid line 1 simultaneously, and distance connects most
The near contact that is electrically connected is the most remote, and the height of thin grid line 1 is the least, and the width of thin grid line 1 is the least.
Embodiment 3, as shown in FIG. 8 and 9,
Comparing with embodiment 1, the trend of thin grid line 1 height reduction is continuous transition, and is positioned at adjacent
Two thin grid lines 1 being electrically connected between contact on have and prejudge grid 4.The width prejudging grid 4 is D, 0mm ＜ D
≤3mm.Prejudge grid 4 and be positioned at the centre position of thin grid line 1.In fig. 4, it is assumed that there are 78 to be horizontally disposed with
Thin grid line 1, and have 22 vertically disposed interconnecting strip 3, then have (22-1) × 78=1638 to prejudge
Grid 4.
The effect prejudging grid 4 is: the grid line of photovoltaic cell often occurs disconnected grid phenomenon in printing process,
And it is all untrue that the position of disconnected grid occurs, the strong influence grid line collection to electric current, and at this
By the local design minimum to cell current collection ability and reliability effect at thin grid line 1 in embodiment
Prejudge grid 4, prejudge grid 4 and can cut down it may happen that the stress of weak spot of disconnected grid so that it may happen that disconnected grid
Weak spot will not be broken grid.Prejudge grid 4 to be also beneficial to reduce the consumption containing Ag slurry simultaneously.
In embodiment 1 and 2, because in the centre at adjacent two the thin grid lines 1 that are electrically connected between contact
The sectional area of position is minimum, and when there is the factor of disconnected grid, also can preferentially rupture, in certain journey in this middle part
Also there is on degree the effect preventing other parts of thin grid line 1 from disconnected grid occurring.
According to the thought of examples detailed above 1,2 and 3, the engineers and technicians of the industry are very easy to draw inferences about other cases from one instance,
The method of embodiment 1,2 and 3 is combined, these is changed, broadly fall into the scope of invention protection,
Patent of the present invention repeats the most one by one.
For the essence of the present invention the most simply and is visually described, the thought of the present invention can be with the tree of the Nature
The structure of leaf (or Human vascular) carrys out analogy.The feature of these transport pipelines is that more to arrive end the most tiny, former
Because of be the collection that undertaken of the pipeline of this section of end and the load transported the most minimum.Common tree leaf vein or general
Logical blood vessel uses commaterial, and the Nature cannot use different materials, therefore have employed simplest
Biological design.In the present invention, the electrode material of photovoltaic cell from original 3 kinds (high containing the thin grid line of Ag,
Low containing Ag main gate line and interconnecting strip) change into 2 kinds (high containing the thin grid line of Ag and interconnecting strip), meanwhile, significantly
Degree increases the quantity of interconnecting strip 3 so that the transportation range of thin grid line 1 is greatly reduced.
For realizing above-mentioned grid line design, the present invention discloses a kind of photovoltaic cell screen printing screens simultaneously:
The first of this photovoltaic cell screen printing screens is designed as:
As shown in figures 11a and 11b, this screen printing screens is used for realizing embodiment 1, including half tone skeleton and
Being fixed on the silk screen on half tone skeleton, silk screen is made up of interlaced horizontal twine 5 and longitudinal twine 6,
Silk screen has the open-work district for printing grid line, other region overlay masks 7 of the silk screen outside open-work district,
Because the sensitive surface of the photovoltaic cell of embodiment 1 only has thin grid line 1, therefore the open-work district of screen printing screens is only
Including the Xi Shan open-work district 8 for printing thin grid line 1, the bearing of trend in Xi Shan open-work district 8 and horizontal twine 5
Bearing of trend consistent, the i.e. laterally bearing of trend one of the bearing of trend of twine 5 and thin grid line 1 to be printed
Causing, the interval between diameter and the horizontal twine 5 of horizontal twine 5 is identical, and the preparation method of mask 7 is:
First on silk screen, coat photosensitive colloid coating, form mask regions with saturating by the method for exposure imaging and corrosion
Porose area, will be printed onto the surface of photovoltaic cell containing Ag slurry by open-work district.In Xi Shan open-work district 8,
Interval between longitudinal twine 6 is identical, the diameter of longitudinal twine 6 and the sectional area of thin grid line 1 to be printed
It is inversely proportional to, so in the printing manufacture process of photovoltaic cell, is leaked down to battery by open-work district containing Ag slurry
During surface, it is possible to form the non-homogeneous grid line of embodiment 1.
The second of this photovoltaic cell screen printing screens is designed as:
As shown in fig. 11c, comparing with the first design of screen printing screens, difference is, at thin grid
In open-work district 8, the diameter of longitudinal twine 6 is identical, the interval between longitudinal twine 6 and thin grid to be printed
The sectional area of line 1 is directly proportional.
The third of this photovoltaic cell screen printing screens is designed as:
Comparing with the first design of screen printing screens, difference is, in Xi Shan open-work district 8, vertical
Sectional area to the diameter of twine 6 with thin grid line 1 to be printed is inversely proportional to, between the most longitudinal twine 6
Interval is directly proportional to the sectional area of thin grid line 1 to be printed.
4th kind of design of this photovoltaic cell screen printing screens:
As illustrated in fig. 11d, this screen printing screens is used for realizing embodiment 3, and the first of screen printing screens
Planting design to compare, difference is, in Xi Shan open-work district 8, the diameter of longitudinal twine 6 is identical, longitudinally
Interval between twine 6 is directly proportional to the sectional area of thin grid line 1 to be printed, in Mei Tiaoxishan open-work district 8
Between have to be formed and prejudge the mask 7-1 of grid, i.e. distance forms that to prejudge the mask 7-1 of grid the nearest, longitudinal twine
The twine interval of 6 is the least.
For realizing above-mentioned grid line design, in addition to above-mentioned screen printing screens, invention further discloses a kind of light
Volt battery metal plate printing screen plate:
This metal sheet printing half tone includes metallic plate 9, offers and be made up of half tone perforate 10 on metallic plate 9
Half tone opening array, forms the open-work of printing grid line on half tone opening array by the way of mask film covering 7
District and mask regions, in open-work district in printing the Xi Shan open-work district 8 of thin grid line 1, half tone opening array
Penetration ration be directly proportional to the sectional area of thin grid line 1 to be printed.Photovoltaic cell metal sheet printing half tone excellent
Point is: on the one hand can avoid the projection weaving node that knit-mesh causes, it is achieved be completely in same
The silk-screen patterns of plane, can print out the higher grid line of depth-width ratio；On the other hand, metal sheet printing half tone
Can also be by the change of half tone opening array pattern, more easily at the different parts of grid line, it is achieved different
Penetration ration.Therefore, it is particularly suitable for amassing the printing of grid line for the nonuniform section of the present invention.
The first design of this photovoltaic cell metal sheet printing half tone:
As shown in figures 12 a and 12b, this metal sheet printing half tone is used for realizing embodiment 1, on metallic plate 9
Logical overetched mode forms the half tone opening array of the silk-screen patterns being similar to Figure 11 a and 11b, metallic plate 9
For Thin Stainless Steel panel material, the half tone perforate 10 of half tone opening array is square, logical on half tone opening array
The mode crossing mask film covering 7 forms open-work district and the mask regions of printing grid line, because the photovoltaic electric of embodiment 1
The sensitive surface in pond only has thin grid line 1, therefore the open-work district of metallic plate half tone only includes for printing thin grid line 1
Xi Shan open-work district 8, in Xi Shan open-work district 8, the Penetration ration of half tone opening array is heterogeneous, with to be printed
The sectional area of the thin grid line 1 of brush is directly proportional.Half tone opening array can be only certain in open-work district and periphery thereof
In the range of, the preparation method of mask 7 is: first coat photosensitive colloid coating on half tone opening array, logical
The method of overexposure development and corrosion forms mask regions and open-work district, containing Ag slurry just on half tone opening array
The surface of photovoltaic cell can be printed onto, because half tone opening array is penetrating by the half tone perforate 10 in open-work district
Rate is heterogeneous, thus can form the non-homogeneous grid line of embodiment 1.
The second design of this photovoltaic cell metal sheet printing half tone:
As shown in Figure 12 c and Figure 12 d, the half tone opening array pattern of metallic plate half tone is with silk-screen patterns not
Identical, although it is all square for comparing half tone perforate 10 with the first design of metal sheet printing half tone, but often
The longitudinal direction in Tiao Xishan open-work district 8 only has row's half tone perforate 10, the bearing of trend in Mei Tiaoxishan open-work district 8
For laterally, the most remote apart from the immediate contact that is electrically connected, the sectional area of thin grid line 1 is the least, half tone opening array
Penetration ration the lowest, the aperture of half tone perforate 10 is the least.
The third design of this photovoltaic cell metal sheet printing half tone:
As shown in Figure 12 e and Figure 12 f, designing with the second of metal sheet printing half tone and compare, difference exists
In, half tone perforate 10 is oval, the most remote apart from the immediate contact that is electrically connected, oval half tone perforate 10
Aperture the least.
It is true that the half tone perforate 10 of metallic plate half tone can also use the figure of other shapes, such as positive six limits
Shape, positive five deformation etc., repeat the most one by one.It is familiar with those skilled in the art can hold very much
Easily just draw inferences about other cases from one instance, in the case of not changing inventive principle, do rationally deformation.
Claims (8)
1. a photovoltaic cell, the sensitive surface at cell piece has grid line, it is characterized in that: described grid line
Being made up of main gate line and thin grid line, thin grid line has the contact that is electrically connected, thin grid line passes through main in the junction that is electrically connected
Grid line is electrically connected with interconnecting strip, the most remote apart from the immediate contact that is electrically connected, and the sectional area of thin grid line is more
Little, the trend that sectional area reduces is continuous print or discontinuous transition, and thin grid line is by reducing thin grid line
Height reduce the sectional area of thin grid line；
Or described grid line is only made up of thin grid line, thin grid line is directly carried out with interconnecting strip in the junction that is electrically connected
Electrical connection, the most remote apart from the immediate contact that is electrically connected, the sectional area of thin grid line is the least, and what sectional area reduced becomes
Gesture is continuous print or discontinuous transition, and thin grid line reduces thin grid line by reducing the height of thin grid line
Sectional area,
Adjacent two the thin grid lines being electrically connected between contact have and prejudges grid.
Photovoltaic cell the most according to claim 1, is characterized in that: the described width prejudging grid is
D, 0mm ＜ D≤3mm.
Photovoltaic cell the most according to claim 1, is characterized in that: described grid of prejudging are positioned at thin grid line
Centre position.
Photovoltaic cell the most according to claim 1, is characterized in that: when described grid line is only by thin grid line
During composition, the quantity of interconnecting strip is 18～50.
Photovoltaic cell the most according to claim 1, is characterized in that: described interconnecting strip by welding or
The mode of conducting resinl bonding is electrically connected.
6. one kind for printing the sensitive surface of photovoltaic cell described in claim 1 or 2 or 3 or 4 or 5
The photovoltaic cell screen printing screens of grid line, is characterized in that: includes half tone skeleton and is fixed on half tone skeleton
Silk screen, described silk screen is made up of interlaced horizontal twine and longitudinal twine, by covering on silk screen
The mode of lid mask forms open-work district and the mask regions of printing grid line,
The bearing of trend in the Xi Shan open-work district for printing thin grid line in open-work district and the bearing of trend of horizontal twine
Unanimously, the interval between diameter and the horizontal twine of horizontal twine is identical,
In Xi Shan open-work district, the interval between longitudinal twine is identical, and the diameter of longitudinal twine is with to be printed
The sectional area of thin grid line is inversely proportional to；Or the diameter of longitudinal twine is identical, the interval between longitudinal twine with treat
The sectional area of the thin grid line of printing is directly proportional；Or the diameter of longitudinal twine and the cross section of thin grid line to be printed
Amassing and be inversely proportional to, the interval between the most longitudinal twine is directly proportional to the sectional area of thin grid line to be printed.
7. one kind for printing the sensitive surface of photovoltaic cell described in claim 1 or 2 or 3 or 4 or 5
The photovoltaic cell metal sheet printing half tone of grid line, is characterized in that: include metallic plate, offer on a metal plate by
The half tone opening array that half tone perforate is constituted, forms print on half tone opening array by the way of mask film covering
The open-work district of brush grid line and mask regions,
In open-work district in printing the Xi Shan open-work district of thin grid line, the Penetration ration of half tone opening array with treat
The sectional area of the thin grid line of printing is directly proportional.
Photovoltaic cell metal sheet printing half tone the most according to claim 7, is characterized in that: described net
Version perforate is oval or rectangle.
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| CN105136140B (en) * | 2015-09-24 | 2017-12-22 | 北京控制工程研究所 | A kind of photoelectric subassembly for the analog sun sensor of dual-axis miniature |
| CN109980023A (en) * | 2017-12-27 | 2019-07-05 | 阿特斯阳光电力集团有限公司 | Photovoltaic cell and photovoltaic module |
| CN113211948A (en) * | 2020-01-21 | 2021-08-06 | 宁夏隆基乐叶科技有限公司 | Screen printing screen plate for solar cell and preparation method of solar cell |
| CN111806060B (en) * | 2020-07-09 | 2022-01-11 | 昆山乐邦精密科技有限公司 | Method for removing screen by etching screen |
| CN219856396U (en) * | 2023-02-17 | 2023-10-20 | 昇印光电（昆山）股份有限公司 | Fine screen plate and printing screen plate assembly |
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| CN102756540A (en) * | 2012-08-06 | 2012-10-31 | 无锡嘉瑞光伏有限公司 | Printing plate for photovoltaic cell screen printing technology |
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| CN103171264A (en) * | 2011-12-23 | 2013-06-26 | 昆山允升吉光电科技有限公司 | Solar energy battery electrode printing screen plate |
| CN203232878U (en) * | 2013-04-27 | 2013-10-09 | 中利腾晖光伏科技有限公司 | Solar cell front electrode structure |
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| CN204204870U (en) * | 2014-09-30 | 2015-03-11 | 信阳师范学院 | A kind of photovoltaic cell and the printing screen plate for printing its grid line |
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| CN103022201A (en) * | 2011-09-27 | 2013-04-03 | 杜邦公司 | Crystal silicon solar battery module and manufacturing method thereof |
| CN103171264A (en) * | 2011-12-23 | 2013-06-26 | 昆山允升吉光电科技有限公司 | Solar energy battery electrode printing screen plate |
| CN102756540A (en) * | 2012-08-06 | 2012-10-31 | 无锡嘉瑞光伏有限公司 | Printing plate for photovoltaic cell screen printing technology |
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