CN203642678U - Roller way type solar cell silicon chip drying and sintering integrated furnace - Google Patents
Roller way type solar cell silicon chip drying and sintering integrated furnace Download PDFInfo
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- CN203642678U CN203642678U CN201320755067.7U CN201320755067U CN203642678U CN 203642678 U CN203642678 U CN 203642678U CN 201320755067 U CN201320755067 U CN 201320755067U CN 203642678 U CN203642678 U CN 203642678U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A roller way type solar cell silicon chip drying and sintering integrated furnace relates to solar cell production equipment, and comprises an underframe, wherein one-way transmission roller ways are arranged on the underframe; the roller ways comprise a plurality of rotary roller bodies, and a V-shaped spiral roller is axially designed in each rotary roller way within a limited silicon sheet transmission range; an oven is arranged on the underframe; a baffle is arranged in the oven; a microwave tube is arranged in the baffle; a blower is arranged at the outlet of the oven. Both the axial contact and the radial contact between the V-shaped spiral roller silicon sheets and the V-shaped spiral rollers are linear contact, accordingly, the phenomenon of the contact between the silicon sheets and a mesh bag surface, existing during the transmission of the mesh bag type silicon sheets, is effectively avoided; the design of the V-shaped spiral grooves is well compatible with the characteristics of the double-faced sintering of a mesh bag type cell front field and a mesh bag type cell back field back field, and meanwhile prevents the mesh texture phenomenon of the cell back field, caused by mesh bag sintering.
Description
Technical field:
The utility model relates to solar cell piece production equipment, is specifically related to roller bed type solar cell silicon wafer drying and sintering all-in-one oven.
Background technology:
Infrared heating Fast Sintering stove is the key equipment of producing solar cell piece, and its performance indications are directly connected to the height of the conversion ratio of cell piece, yield rate and production efficiency.
In the whole technological process of production of solar cell piece, diffusion, plated film and sintering three process are topmost, and wherein sintering is to make crystalline silicon substrate really have a vital step of photoelectric converting function.Therefore, the performance quality of agglomerating plant directly affects the quality of cell piece.
Solar cell piece adopts at present only needs once sintered co-firing technology, forms the Ohmic contact of upper/lower electrode simultaneously.The silicon chip of silver slurry, silver-colored aluminium paste, aluminium paste printing, volatilizees organic solvent through drying completely, and rete shrinks becomes decorating film tight adhesion on silicon chip, at this moment can be considered that metal electrode material layer and silicon chip contact.In the time that the heating of electrode metal material and single crystal silicon semiconductor reaches eutectic temperature, monocrystalline silicon atom is added in the alloy electrode material of melting in certain proportion.The whole process that monocrystalline silicon atom is added in electrode metal is quickish, and general needs several seconds.The monocrystalline silicon atom number dissolving in depends on the volume of alloy temperature and electrode material, and sintered alloy temperature is higher, and electrode metal material volume is larger, and the silicon atom number dissolving in is also more, and state is at this moment called as the alloy system of crystalline electrode metal.If now temperature reduces, system begins to cool down formation recrystallized layer, and the silicon atom being at this moment originally added in electrode metal material crystallizes out with solid-state form again, namely on metal and crystal contact interface, grows one deck epitaxial layer.If epitaxial layer contains the impurity composition identical with original crystalline material conduction type of q.s, this has just obtained by alloyage technique formation Ohmic contact; If contain q.s and impurity composition original crystalline material conduction type abnormal shape at crystallizing layer, this has just obtained and has formed P.N knot by alloyage technique.
The sintering curre of typical solar cell piece, about 120s of whole time, is divided into oven dry, pre-burning, sintering and cooling four-stage.Wherein sintering stage is warming up to rapidly 850 ℃ of left and right from 500 ℃, then below reduces heat to 500 ℃, and about 10s during this period of time, and only stop 2～3s at 850 ℃.This process curve that skyrockets and suddenly fall, requires agglomerating plant must carry out special design and R&D at aspects such as mesh bag structure, mesh bag transmission, heating element heater, chamber structure, atmosphere layout, control principle, transmission system and the types of cooling.
The manufacture of solar cells technique of main flow at present, all adopts positive and back side Fast Sintering simultaneously.But because cell piece two is in the face of the different requirements of sintering condition, furnace atmosphere is very large on sintering impact with the mesh bag of carrying cell piece.This mainly comes from net-bag type sintering furnace and all adopts friction-type drive, with regulating wheel, mesh bag is pressed on main driving wheel, follows driving wheel and moves together.The factors such as the steady degree of the braiding structure of mesh bag, supporting way, operation, all can directly have influence on the outward appearance of cell piece and an electrical property for ohm joint that forms.
Along with the growing stronger day by day and develop of photovoltaic industry, people are more and more higher to cell piece presentation quality and its requirement on electric performance.And there are obvious shortcomings and deficiencies in the sintering of net-bag type cell piece, such as:
1, there is obvious reticulate pattern phenomenon in the back surface field of cell piece.Cause the main cause of back surface field reticulate pattern phenomenon to be: mesh bag is that face contacts with cell piece.Mesh bag has many contact points after solar cell back, and in sintering process, the organic effective volatilization on contacting points position in aluminium paste has been subject to impact.Organic substance residues has affected the Ohmic contact of electrode and silicon chip.
2, cell piece and mesh bag comprehensive engagement, covers mesh bag, is unfavorable for the stirring of gas stream in the stove, easily causes the cell piece inequality of being heated.
3, the aluminium under molten condition on cell piece and mesh bag contact point, easily adsorbs the foreign material on mesh bag, affects the surface topography of back surface field, even produces aluminium thorn, causes the generation of waste product.It seems from this point, the contact-making surface of cell piece and mesh bag is the smaller the better.
4, experiment also shows, though by the tensioning of mesh bag and the improvement of transmission speed, can keep the sintering of most cell pieces all right.But experiment is also found: the phenomenon of elongated cut appears in back surface field and mesh bag contact point.Tracing it to its cause, may be that cell piece is lightweight, in the process that the point contacting with mesh bag rocks at mesh bag, easily and mesh bag be subjected to displacement and cause.
All this kind, develop cell piece oven dry of new generation, sintering furnace, has been photovoltaic industry realistic problem urgently to be resolved hurrily.
Utility model content:
Technical problem to be solved in the utility model is to overcome the defect of prior art, provides a kind of and can well evade and the roller bed type solar cell silicon wafer drying and sintering all-in-one oven that solves net belt type oven dry, the existing all deficiencies of sintering furnace.
Technical problem to be solved in the utility model realizes by the following technical solutions.
Roller bed type solar cell silicon wafer drying and sintering all-in-one oven, it is characterized in that: comprise underframe, underframe is provided with along the roller-way of a direction transmission, and roller-way comprises multiple rotatable roll bodies, and the roller-way of each rotation, in transmission silicon chip limited range, at axial design forming V-shape propellers, described underframe is provided with baking box, in described baking box, is provided with dividing plate, in dividing plate, be provided with microwave tube, described baking box exit is provided with blower fan.
Described underframe below is provided with baking box, is provided with dividing plate in baking box, is provided with microwave tube between dividing plate.
Described baking box is positive has cabinet door for chain connection.
On described cabinet door, be interval with observation window.
Described baking box top is provided with ventilating opening.
The described roll body material with silicon chip contact site is nonmetal.
The utility model beneficial effect is: V-arrangement propellers silicon chip contacts with V-arrangement propellers, no matter axially or radially, be linear contact, thereby effectively evade the phenomenon that during net belt type silicon chip transmits, the silicon chip of existence contacts with mesh bag face, the design of V-arrangement spiral fluted, the characteristic of positive of well compatible net belt type cell piece and the two-sided sintering of back surface field, overcome again the reticulate pattern phenomenon that cell piece back surface field falls because of mesh bag sintering, more scientific, with the roll body material of silicon chip contact site be nonmetallic.Between sintering zone and discharging area, be provided with air blast cooling district, substituted traditional water-cooled district.This roller bed type solar cell silicon wafer sintering furnace is compared with traditional wire netting belt sintering furnace, not only can avoid silicon chip polluted and occur " reticulate pattern " in the process of transmission, and can improve transfer rate, realize be rapidly heated and cooling, reach desirable temperature spikes effect, raising battery sintering quality; Because cancelled water-cooled district, can also shorten body of heater length, reduce energy consumption.
Accompanying drawing explanation:
Fig. 1 is the front elevational schematic of the utility model structure;
Fig. 2 is structure side-looking generalized section of the present utility model;
Wherein: 1: underframe; 2: roller-way; 3: roll body; 4: baking box; 5: dividing plate; 6: microwave tube; 7: cabinet door; 8: ventilating opening; 9: blower fan.
The specific embodiment:
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Roller bed type solar cell silicon wafer drying and sintering all-in-one oven as depicted in figs. 1 and 2, comprise underframe 1, underframe 1 is provided with along the roller-way 2 of a direction transmission, roller-way 2 comprises multiple rotatable roll bodies 3, and the roller-way 2 of each rotation, in transmission silicon chip limited range, at axial design forming V-shape propellers, wherein on underframe 1, have baking box 4, wherein in baking box 4, be provided with dividing plate 5, in dividing plate 5, be provided with microwave tube 6, baking box 4 exits are provided with blower fan 9, wherein baking box 4 is positive has cabinet door 7 for chain connection, on cabinet door 7, be interval with observation window, baking box 4 tops are provided with ventilating opening 8, wherein nonmetal with the roll body material of silicon chip contact site.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. roller bed type solar cell silicon wafer drying and sintering all-in-one oven, it is characterized in that: comprise underframe, underframe is provided with along the roller-way of a direction transmission, and roller-way comprises multiple rotatable roll bodies, and the roller-way of each rotation, in transmission silicon chip limited range, at axial design forming V-shape propellers, described underframe is provided with baking box, in described baking box, is provided with dividing plate, in dividing plate, be provided with microwave tube, described baking box exit is provided with blower fan.
2. according to the roller bed type solar cell silicon wafer drying and sintering all-in-one oven described in claim 1, it is characterized in that: described underframe below is provided with baking box, is provided with dividing plate in baking box, is provided with microwave tube between dividing plate.
3. according to the roller bed type solar cell silicon wafer drying and sintering all-in-one oven described in claim 1 or 2, it is characterized in that: described baking box is positive has cabinet door for chain connection.
4. according to the roller bed type solar cell silicon wafer drying and sintering all-in-one oven described in claim 3, it is characterized in that: on described cabinet door, be interval with observation window.
5. according to the roller bed type solar cell silicon wafer drying and sintering all-in-one oven described in claim 1, it is characterized in that: described baking box top is provided with ventilating opening.
6. according to the roller bed type solar cell silicon wafer drying and sintering all-in-one oven described in claim 1, it is characterized in that: the described roll body material with silicon chip contact site is nonmetal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320755067.7U CN203642678U (en) | 2013-11-25 | 2013-11-25 | Roller way type solar cell silicon chip drying and sintering integrated furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320755067.7U CN203642678U (en) | 2013-11-25 | 2013-11-25 | Roller way type solar cell silicon chip drying and sintering integrated furnace |
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| CN203642678U true CN203642678U (en) | 2014-06-11 |
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| CN201320755067.7U Expired - Fee Related CN203642678U (en) | 2013-11-25 | 2013-11-25 | Roller way type solar cell silicon chip drying and sintering integrated furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743231A (en) * | 2013-11-25 | 2014-04-23 | 安徽赛耐尔机械制造有限公司 | Roller-bed-type drying and sintering integrated furnace for solar battery silicon wafers |
| CN107406289A (en) * | 2015-04-07 | 2017-11-28 | 新能晋私人有限公司 | Apparatus and method for improved evaporation drying |
| CN109065929A (en) * | 2018-08-06 | 2018-12-21 | 张健 | A kind of simple preparation method of anode of solid oxide fuel cell supporter |
| CN111129222A (en) * | 2019-12-24 | 2020-05-08 | 浙江芯能光伏科技股份有限公司 | Production device for solar polycrystalline silicon wafers |
-
2013
- 2013-11-25 CN CN201320755067.7U patent/CN203642678U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743231A (en) * | 2013-11-25 | 2014-04-23 | 安徽赛耐尔机械制造有限公司 | Roller-bed-type drying and sintering integrated furnace for solar battery silicon wafers |
| CN107406289A (en) * | 2015-04-07 | 2017-11-28 | 新能晋私人有限公司 | Apparatus and method for improved evaporation drying |
| CN109065929A (en) * | 2018-08-06 | 2018-12-21 | 张健 | A kind of simple preparation method of anode of solid oxide fuel cell supporter |
| CN111129222A (en) * | 2019-12-24 | 2020-05-08 | 浙江芯能光伏科技股份有限公司 | Production device for solar polycrystalline silicon wafers |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20151125 |