CN102122681A - Method for connecting solar battery sheets - Google Patents
Method for connecting solar battery sheets Download PDFInfo
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- CN102122681A CN102122681A CN2010105898164A CN201010589816A CN102122681A CN 102122681 A CN102122681 A CN 102122681A CN 2010105898164 A CN2010105898164 A CN 2010105898164A CN 201010589816 A CN201010589816 A CN 201010589816A CN 102122681 A CN102122681 A CN 102122681A
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- battery sheet
- solar battery
- attachment
- aluminum metal
- metal layer
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a method for connecting solar battery sheets in the photovoltaic or semiconductor field. In order to solve the technical problem, the method for connecting the solar battery sheets with low cost is provided, and the solar battery sheets are involved. The method is characterized in that: no back electrode prepared from silver paste is arranged on the back of the battery sheet; a part of a back oxidized layer of the solar battery sheet is removed so as to expose an aluminum metal layer; the aluminum metal layer is connected with an illuminated surface electrode of another battery sheet through a metal lead wire; and the metal lead wire is pressed on the aluminum metal layer and the illuminated surface electrode of the solar battery sheet in an ultrasonic welding manner. As no back electrode prepared from silver paste is arranged on the back of the battery sheet, the aluminum metal layer is exposed by removing a part of the back oxidized layer of the solar battery sheet; and an aim of reducing the cost can be fulfilled by pressing the aluminum lead wires on the aluminum metal layers of the solar battery sheets in the ultrasonic welding manner.
Description
Technical field
The present invention relates to the method for attachment of a kind of solar battery sheet in photovoltaic or the semiconductor applications.
Background technology
General making solar battery sheet is a substrate with P type silicon chip usually, and the silicon chip sensitive surface is made the N type, utilizes silver slurry coating and anti-reflection coating to form a collector electrode, and with silicon chip back, promptly shady face deposits the layer of aluminum film, preparation P
+, form aluminium back of the body field, prepare the back electrodes of 2 ~ 3 silver slurries preparation then, the back electrode width is 10 microns to 200 microns.Adopt the thick 0.05～0.3mm of being then, wide is that copper wires and the battery sheet mode by welding of 1～3mm is connected and obtains battery strings.Because back electrode adopts the expensive silver slurry composition of cost, must use copper wires for the ease of welding lead, the cost height simultaneously.And existing welding method is manually to adopt electric iron, and the tin silk is a scaling powder, and the sensitive surface electrode of battery sheet is welded on the backplate of another battery sheet, cost height not only, speed of welding is slow, and welding quality is inhomogeneous, and poor working environment pollutes environment.
Summary of the invention
The technical problem to be solved in the present invention provides the method for attachment of the low solar battery sheet of a kind of cost.
It is fast that another technical problem that the present invention will solve provides a kind of speed welding, the method for attachment of the solar battery sheet of the band aluminum metal layer of firm welding.
The method of attachment technical scheme of the solar battery sheet that a kind of cost that relates to of the present invention is low mainly relies on cheap aluminum metal lead to replace material leads such as expensive silver, copper to finish, and has cancelled the back electrode of cell back face silver slurry preparation simultaneously, is specially:
A kind of method of attachment of solar battery sheet, comprise the battery sheet, wherein: the cell back face does not have the back electrode of silver slurry preparation, remove the part back side oxide layer of solar battery sheet, expose aluminum metal layer, aluminum metal layer is connected with the sensitive surface electrode of another battery sheet by plain conductor, and plain conductor is compressed on respectively on the aluminum metal layer and sensitive surface electrode of solar battery sheet in the ultrasonic bonding mode.Because the aluminium of a solar cell back face back of the body surface is owing to oxidized, so must remove the part back side oxide layer of solar battery sheet earlier before carrying out ultrasonic bonding.Aluminum metal layer is as the backplate of solar battery sheet.
A kind of method of attachment of solar battery sheet, wherein: described plain conductor can be that any material of gold, silver, copper or aluminium is made.
A kind of method of attachment of solar battery sheet, wherein: described plain conductor is an aluminium matter lead.
A kind of method of attachment of solar battery sheet, wherein: the back side oxide layer of removing solar battery sheet with the method for sandblast.Sandblast is meant that adopting compressed air is power, the material spray high velocity jet is arrived the solar cell back face that needs processing to form the high velocity jet bundle, owing to impact and the shear action of material spray, thereby make the oxide layer removal of cell back face obtain aluminum metal layer to the cell back face.Material spray can be any one of copper ore, quartz sand, diamond dust, iron sand, SEMEN AMOMI LONGILIGULA,
A kind of method of attachment of solar battery sheet, wherein: the back side oxide layer of removing solar battery sheet with hairbrush.Adopt hairbrush that battery sheet oxide layer is struck off.
A kind of method of attachment of solar battery sheet, wherein: the back side oxide layer of removing solar battery sheet with chemical etching method.Chemical etching liquid can be acid solution or aqueous slkali, and acid solution can be HF acid, and aqueous slkali can be the NaOH aqueous solution.Its principle is to adopt chemical etching liquid and the reaction of back side oxide layer, obtains aluminum metal layer thereby remove oxide layer.
It is fast that another technical problem that the present invention will solve provides a kind of speed welding, the method for attachment of the solar battery sheet of the band aluminum metal layer of firm welding.This speed welding is fast, and the supersonic welding connection technology has mainly been adopted in the method for attachment of firm welding, and is specific as follows:
A kind of method of attachment of solar battery sheet, wherein: heat under the ultrasonic bonding condition, the heating-up temperature scope is at 300-800 ℃.Heating can strengthen the effect of ultrasonic bonding.
A kind of method of attachment of solar battery sheet, wherein: the frequency of ultrasonic scope is at 10KHZ-100 KHZ.
Solder technology of the present invention is ultrasonic bonding, and it is by weldment ultrasonic energy to be sent to welding zone, because the interface place acoustic resistance of i.e. two welding of welding zone is big, therefore can produce localized hyperthermia.Because the aluminium poor thermal conductivity, can't in time distribute for the moment again, accumulate in welding zone, cause the aluminum metal layer of solar battery sheet and the contact-making surface of aluminium matter lead to melt rapidly, add certain pressure after, make aluminum metal layer and aluminium matter lead be fused into one.After ultrasonic wave fails, allow pressure continue several seconds, make its coagulation forming, so just form a firm strand, reach the purpose of welding, thereby realize that solar battery sheet obtains battery strings with being connected of aluminium matter lead.
Ultrasonic bonding is at present extensively applied to the bonding of bonding, plasthetics and metal fittings between the plasthetics and the bonding between other non-plastic material, and the connection technology of supersonic welding has simultaneously also carried out extensive use to the greatest extent in semiconductor and non-crystalline silicon thin-film field of batteries.The present invention is connected supersonic welding connection technology first Application and crystal silicon solar cell sheet.Ultrasonic bonding speed is fast, does not need any scaling powder, weld strength height, good airproof performance, and than traditional battery sheet welding procedure, cost is lower, can not produce spark in the welding process, can not pollute and can not damage workpiece environment; The process stabilization of ultrasonic bonding simultaneously, all welding parameters all can be carried out tracing and monitoring by software systems, in case find that fault is easy to get rid of and safeguard.
The method of attachment of solar battery sheet provided by the invention, the back side does not have the back electrode of silver slurry preparation, but by removing the part back side oxide layer of solar battery sheet, expose aluminum metal layer, adopt ultrasonic bonding that aluminium matter lead is compressed on the aluminum metal layer of solar battery sheet, thereby reach the purpose that reduces cost.
In addition, existing battery sheet generally has the back electrode of 2 ~ 3 silver slurries preparation, width is 10 microns to 200 microns, the present invention does not have the back electrode of silver slurry preparation because of the back side, the area of aluminium back of the body field increases, the compound overleaf probability of minority carrier can be reduced because aluminium is carried on the back the field,, the effect of aluminium back of the body field can be improved so increased the area of aluminium back of the body field.
The butt welding of supersonic welding connection technology connects fast technical contribution and is embodied in: the aluminum metal lead is when material leads such as replacing expensive silver, copper carries out the connection of battery sheet, it is slow that the conventional Electric heating of employing is carried out the aluminum metal speed of welding, can influence production efficiency like this, it is 30KHZ and heating-up temperature that the present invention adopts specific ultrasonic frequency, can obtain good rapid welding effect relatively.
The butt welding of supersonic welding connection technology connects firm technical contribution and is embodied in: the artificial welding of the electric iron mode that employing is conventional is carried out the aluminum metal welding and can not accurately be controlled, can influence welding quality like this, it is 30KHZ and heating-up temperature that the present invention adopts specific ultrasonic frequency, can obtain good welding quality relatively.
The implementation result of table 1 different technologies scheme relatively
| Technical scheme | Weld time | Welding quality |
| Embodiment 10 | 0.8 it is Miao ∕, the fastest | Very firm |
| Embodiment 11 | 1.2 it is Miao ∕, slow a little | Very firm |
| Embodiment 12 | 1 Miao ∕, fast | Very firm |
| Embodiment 13 | 1.3 it is Miao ∕, slow a little | Very firm |
| Embodiment 14 | 1.5 it is Miao ∕, slow a little | Very firm |
| Conventional electric iron manually welds | 2.5--3 it is Miao ∕, very slow | Be easy to generate the uneven situation of welding |
Description of drawings
Accompanying drawing 3 is the structure schematic diagrames after the embodiment of the invention 10 is removed back side oxide layer;
Accompanying drawing 4 is the structural representations after the embodiment of the invention 10 sensitive surfaces are installed lead;
Accompanying drawing 5 is the structural representations after lead is installed at the embodiment of the invention 10 back sides.
Reference numeral: aluminum metal layer 1, back side oxide layer 2, plain conductor 3, sensitive surface electrode 4, silver slurry backplate 5.
Embodiment
The method of attachment of embodiment 1, a kind of solar battery sheet, comprise the battery sheet, wherein: the cell back face does not have the back electrode 5 of silver slurry preparation, remove the part back side oxide layer 2 of solar battery sheet, expose aluminum metal layer 1, aluminum metal layer 1 is connected with the sensitive surface electrode 4 of another battery sheet by plain conductor 3, and plain conductor 3 is compressed on respectively on the aluminum metal layer 1 and sensitive surface electrode 4 of solar battery sheet in the ultrasonic bonding mode.
The method of attachment of embodiment 2, a kind of solar battery sheet, wherein: described plain conductor 3 is golden leads.All the other are with embodiment 1.
The method of attachment of embodiment 3, a kind of solar battery sheet, wherein: described plain conductor 3 is silver leads.All the other are with embodiment 1.
The method of attachment of embodiment 4, a kind of solar battery sheet, wherein: described plain conductor 3 is aluminium matter leads.All the other are with embodiment 1.
The method of attachment of embodiment 5, a kind of solar battery sheet, wherein: the back side oxide layer 2 of removing solar battery sheet with the method for sandblast.All the other are with embodiment 1.
The method of attachment of embodiment 6, a kind of solar battery sheet, wherein: the back side oxide layer 2 of removing solar battery sheet with hairbrush.All the other are with embodiment 1.
The method of attachment of embodiment 7, a kind of solar battery sheet, wherein: the back side oxide layer 2 of removing solar battery sheet with chemical etching method.All the other are with embodiment 1.
The method of attachment of embodiment 8, a kind of solar battery sheet, wherein: heat under the ultrasonic bonding condition, the heating-up temperature scope is at 300-800 ℃.All the other are with embodiment 1.
The method of attachment of embodiment 9, a kind of solar battery sheet, wherein: in specification is 156mmx156mmx0.2mm cell back face, the back electrode 5 that does not have the preparation of silver slurry, remove the part back side oxide layer 2 of solar battery sheet with the method for sandblast, expose aluminum metal layer 1, aluminum metal layer 1 logical peraluminous lead is connected with the sensitive surface electrode 4 of another battery sheet, aluminium matter lead is compressed on respectively on the aluminum metal layer 1 and sensitive surface electrode 4 of solar battery sheet in the ultrasonic bonding mode, and ultrasonic frequency is 20KHZ.All the other are with embodiment 1.
The method of attachment of embodiment 10, a kind of solar battery sheet, wherein: in specification is 156mmx156mmx0.2mm cell back face, the back electrode 5 that does not have the preparation of silver slurry, remove the part back side oxide layer 2 of solar battery sheet with hairbrush, expose aluminum metal layer 1, aluminum metal layer 1 logical peraluminous lead is connected with the sensitive surface electrode 4 of another battery sheet, aluminium matter lead is compressed on the aluminum metal layer 1 and sensitive surface electrode 4 of solar battery sheet respectively in the ultrasonic bonding mode, ultrasonic frequency is 30KHZ, and temperature is 500 ℃.All the other are with embodiment 1.
The method of attachment of embodiment 11, a kind of solar battery sheet, wherein: ultrasonic frequency is 10KHZ, temperature is 300 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 12, a kind of solar battery sheet, wherein: ultrasonic frequency is 20KHZ, temperature is 400 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 13, a kind of solar battery sheet, wherein: ultrasonic frequency is 40KHZ, temperature is 500 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 14, a kind of solar battery sheet, wherein: ultrasonic frequency is 50KHZ, temperature is 500 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 15, a kind of solar battery sheet, wherein: ultrasonic frequency is 60KHZ, temperature is 600 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 16, a kind of solar battery sheet, wherein: ultrasonic frequency is 70KHZ, temperature is 700 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 17, a kind of solar battery sheet, wherein: ultrasonic frequency is 80KHZ, temperature is 800 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 18, a kind of solar battery sheet, wherein: ultrasonic frequency is 90KHZ, temperature is 900 ℃.All the other are with embodiment 9 or embodiment 10.
The method of attachment of embodiment 19, a kind of solar battery sheet, wherein: ultrasonic frequency is 100KHZ, temperature is 500 ℃.All the other are with embodiment 9 or embodiment 10.
Claims (8)
1. the method for attachment of a solar battery sheet, comprise the battery sheet, it is characterized in that: the cell back face does not have the back electrode (5) of silver slurry preparation, remove the part back side oxide layer (2) of solar battery sheet, expose aluminum metal layer (1), aluminum metal layer (1) is connected with the sensitive surface electrode (4) of another battery sheet by plain conductor (3), and plain conductor (3) is compressed on respectively on the aluminum metal layer (1) and sensitive surface electrode (4) of solar battery sheet in the ultrasonic bonding mode.
2. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: described plain conductor (3) can be that any material of gold, silver, copper or aluminium is made.
3. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: described plain conductor (3) is an aluminium matter lead.
4. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: adopt blasting method to remove the back side oxide layer (2) of solar battery sheet.
5. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: adopt hairbrush to remove the back side oxide layer (2) of solar battery sheet.
6. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: adopt chemical etching method to remove the back side oxide layer (2) of solar battery sheet.
7. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: heat under the ultrasonic bonding condition, the heating-up temperature scope is at 300-800 ℃.
8. the method for attachment of a kind of solar battery sheet as claimed in claim 1 is characterized in that: the frequency of ultrasonic scope is at 10KHZ-100 KHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105898164A CN102122681A (en) | 2010-12-16 | 2010-12-16 | Method for connecting solar battery sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105898164A CN102122681A (en) | 2010-12-16 | 2010-12-16 | Method for connecting solar battery sheets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102122681A true CN102122681A (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105898164A Withdrawn CN102122681A (en) | 2010-12-16 | 2010-12-16 | Method for connecting solar battery sheets |
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| CN (1) | CN102122681A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299202A (en) * | 2011-08-25 | 2011-12-28 | 浙江正泰太阳能科技有限公司 | Thin film battery lead connecting method |
| CN102751359A (en) * | 2012-07-05 | 2012-10-24 | 合肥海润光伏科技有限公司 | Crystalline silicon solar battery slice string and manufacturing method thereof |
| CN104716061A (en) * | 2015-01-29 | 2015-06-17 | 信阳师范学院 | Ultrasonic welding method and photovoltaic module for welding through ultrasonic welding method |
| CN108604610A (en) * | 2016-02-03 | 2018-09-28 | 三菱电机株式会社 | Solar cell module and its manufacturing method |
-
2010
- 2010-12-16 CN CN2010105898164A patent/CN102122681A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299202A (en) * | 2011-08-25 | 2011-12-28 | 浙江正泰太阳能科技有限公司 | Thin film battery lead connecting method |
| CN102751359A (en) * | 2012-07-05 | 2012-10-24 | 合肥海润光伏科技有限公司 | Crystalline silicon solar battery slice string and manufacturing method thereof |
| CN104716061A (en) * | 2015-01-29 | 2015-06-17 | 信阳师范学院 | Ultrasonic welding method and photovoltaic module for welding through ultrasonic welding method |
| CN104716061B (en) * | 2015-01-29 | 2018-01-09 | 信阳师范学院 | Ultrasonic welding method and the photovoltaic module welded using this method |
| CN108604610A (en) * | 2016-02-03 | 2018-09-28 | 三菱电机株式会社 | Solar cell module and its manufacturing method |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Open date: 20110727 |