CN102185014A - Treatment method of leaked solar battery plates and tool clamp applying the method - Google Patents
Treatment method of leaked solar battery plates and tool clamp applying the method Download PDFInfo
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- CN102185014A CN102185014A CN2010105711016A CN201010571101A CN102185014A CN 102185014 A CN102185014 A CN 102185014A CN 2010105711016 A CN2010105711016 A CN 2010105711016A CN 201010571101 A CN201010571101 A CN 201010571101A CN 102185014 A CN102185014 A CN 102185014A
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- solar battery
- battery sheet
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The embodiment of the invention discloses a treatment method of leaked solar battery plates. The treatment method comprises the steps of screening out solar battery plates with leakage value larger than the preset threshold from finished solar battery plates; enabling the solar battery plates screened out to be aligned and clamped through a tool clamp, and wiping the grind edge until detecting that the leakage current of the battery plate is smaller than the preset threshold. The method transforms the solar battery plates with edge leakage instead of treating the solar battery plates as substandard or poor-efficiency solar battery plates, the silicon wafers with edge leakage are aligned, then clamped through the tool clamp and then subjected to wiping and edging, the edge PN junctions of the silicon wafer are damaged through mechanical force so as to separate the PN junctions safely, thus avoiding the situation of the edge leakage of the silicon wafer due to halfway plasma etching. In addition, the invention also provides a tool clamp applying the method.
Description
Technical field
The present invention relates to the production and processing of solar cell, more particularly, relate to a kind of solar battery sheet processing method and be used for the frock clamp of this method of leaking electricity.
Background technology
In recent years, the solar battery sheet production technology is constantly progressive, and production cost constantly reduces, and conversion efficiency improves constantly, and the application of photovoltaic generation is popularized and fast development day by day, becomes the important source of supply of electric power gradually.Solar battery sheet is the photoelectric cell of a kind of ability conversion, and it can be transform light energy an electric energy under irradiation of sunlight, realizes photovoltaic generation.
The production technology more complicated of solar battery sheet, in brief, the production process of present solar battery sheet can be divided into following key step:
Step S11, surface wool manufacturing and chemical cleaning silicon chip surface form rough structure by chemical reaction at the silicon chip surface of otherwise smooth, to strengthen the absorption of light;
Step S12, diffusion system knot, the silicon chip of P type is put into diffusion furnace, make N type foreign atom silicon chip surface layer, spread to the silicon chip internal penetration by the space between the silicon atom, form PN junction, make electronics and hole after flowing, not return the original place, so just form electric current, just make silicon chip have photovoltaic effect;
Step S13, plasma etching are removed the conductive layer with the PN junction short circuit that forms at silicon chip edge in the diffusion process;
Step S14, panel PECVD (plasma enhanced chemical vapor deposition, the chemical vapor deposition that plasma strengthens), promptly deposit antireflective coating, utilize the film interference principle, reduce reflection of light, play passivation, increase the short circuit current and the power output of battery, improve conversion efficiency;
Step S15, print electrode, adopt silver slurry printing positive electrode and back electrode, adopt the aluminium paste printing back of the body, with collected current and play the effect of conduction;
Step S16, sintering at high temperature make between the electrode of printing and the silicon chip and form ohmic contact.
In implementing the process of the invention, the inventor finds that when silicon chip was carried out plasma etching, if the edge etching is unclean, metallic atom can be diffused into silicon chip edge when sintering, make have electric current by the time form short circuit, leaky appears.And prior art does not have effective way to this, generally is the battery sheet of silicon chip edge electric leakage is directly handled by outer poor efficiency such as grade, promptly according to waiting outer battery sheet or efficiency battery sheet to handle, causes the wasting of resources of battery sheet.
Summary of the invention
The embodiment of the invention provides a kind of solar battery sheet processing method and be used for the frock clamp of this method of leaking electricity, and outer poor efficiencys such as drain batteries is handled and the waste resource avoiding.
For achieving the above object, the embodiment of the invention provides following technical scheme:
A kind of processing method of the solar battery sheet that leaks electricity comprises:
From the finished product solar battery sheet, filter out the solar battery sheet of electric leakage greater than default thresholding;
The described battery sheet that filters out is aligned, clamp with frock clamp, and carry out the wiping edging up to detecting battery sheet leakage current less than default thresholding.
Preferably, in the said method, described default thresholding is 2A to 3A.
Preferably, in the said method, described default thresholding is 3A.
A kind of frock clamp that is used for the processing method of above-mentioned electric leakage solar battery sheet comprises:
Structure first clamping plate and second clamping plate identical, that be provided with in opposite directions, first clamping plate and second clamping plate face in opposite directions are that medial surface is the plane;
Be arranged at described first clamping plate and the second clamping plate both sides, be used to regulate the degree of tightness part of distance between first clamping plate and second clamping plate.
Preferably, described frock clamp also comprises: the handle that is arranged on first clamping plate or the second clamping plate lateral surface.
Preferably, in the described frock clamp, described handle comprises:
First fixed part and second fixed part that connect described first clamping plate or the second clamping plate upper and lower side respectively;
The connecting rod that connects described first fixed part and second fixed part, described connecting rod and install to have between the lateral surface of described first fixed part and second fixed part and can hold the distance that finger passes.
Preferably, in the described frock clamp, described first fixed part and second fixed part are positioned at the medium position of described first clamping plate or the second clamping plate upper and lower side respectively.
Preferably, in the described frock clamp, described degree of tightness part is a fastening bolt, and an end of this fastening bolt passes the screw of described first clamping plate and the second clamping plate both sides successively.
Preferably, in the described frock clamp, described screw is positioned at the middle part of described first clamping plate and the second clamping plate both sides.
From technique scheme as can be seen, compared with prior art, the embodiment of the invention, but will be transformed not waiting outer or the poor efficiency solar battery sheet is handled for the solar battery sheet of edge current leakage, by transforming, these solar battery sheets can normally be used.Concrete reforming mode is: after the silicon chip of edge current leakage is aligned, clamp with frock clamp, carry out the wiping edging then, destroy the silicon chip edge PN junction by mechanical force, with this PN junction safe separating, thereby avoid taking place because of the clean situation that does not cause the silicon chip edge electric leakage of plasma etching.
Description of drawings
Shown in accompanying drawing, above-mentioned and other purpose, feature and advantage of the present invention will be more clear.Reference numeral identical in whole accompanying drawings is indicated identical part.Painstakingly do not draw accompanying drawing, focus on illustrating purport of the present invention by actual size equal proportion convergent-divergent.
Fig. 1 is the manufacture method flow chart of prior art silicon solar cell;
Fig. 2 is a PN junction structure schematic diagram under the normal condition;
Fig. 3 is a PN junction structure schematic diagram under the unclean situation of plasma etching;
The basic flow sheet of the processing method of a kind of solar battery sheet that leaks electricity that Fig. 4 provides for the embodiment of the invention;
Fig. 5 is after implementing flow process shown in Figure 4, PN junction structure schematic diagram;
Fig. 6 is the schematic diagram of a kind of structure of the frock clamp that is used to clamp solar battery sheet in the method shown in Figure 4;
Fig. 7 is the schematic diagram of the another kind of structure of the frock clamp that is used to clamp solar battery sheet in the method shown in Figure 4;
Fig. 8 is the structural representation of handle in the structure shown in Figure 7;
Fig. 9 is the syndeton schematic diagram of handle and first clamping plate 1 or second clamping plate 2 in the structure shown in Figure 7;
Figure 10 is in the frock clamp shown in Figure 6, a kind of concrete shape schematic diagram of described first clamping plate 1 and second clamping plate 2.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
A lot of details have been set forth 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 and implement, those skilled in the art can do similar popularization under the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
Secondly, the present invention is described in detail in conjunction with schematic diagram, when the embodiment of the invention is described in detail in detail; for ease of explanation; the profile of expression device architecture can be disobeyed general ratio and be done local the amplification, and described schematic diagram is example, and it should not limit the scope of protection of the invention at this.The three dimensions size that in actual fabrication, should comprise in addition, length, width and the degree of depth.
In general, technology induces leakage current that defective causes the voltage-current characteristic of solar cell maximum power point is played a leading role.Just as described in the background section, the solar battery sheet of producing in the prior art, because in manufacture process, that the silicon chip edge etching is unclean when carrying out plasma etching, thereby produce the electric leakage situation, when the leakage current of silicon chip reaches default thresholding, this silicon chip promptly can be regarded waits outer battery sheet or efficiency battery sheet to handle, as shown in Figures 2 and 3, Fig. 2 is the PN junction structure under the normal condition, and Fig. 3 is through some battery edge PN junction part separated structures schematic diagram behind the plasma etching.Prior art does not have other processing modes so that these battery sheets are effectively utilized, and causes the wasting of resources.To this, the inventor provides a solution, destroys the PN junction at drain batteries sheet edge by mechanical force, improves the electric leakage situation, thereby can avoid directly the drain batteries sheet being waited outer or poor efficiency is handled and wasted battery sheet resource.
Be described in detail below by several embodiment.
The embodiment of the invention provides a kind of processing method of the solar battery sheet that leaks electricity, and the flow chart of this method may further comprise the steps as shown in Figure 4:
Step S41, from the finished product solar battery sheet, filter out the solar battery sheet of electric leakage greater than default thresholding.
Concrete, by the letter sorting testing equipment, sorting out the solar battery sheet of electric leakage in the solar battery sheet in flakes greater than default thresholding.
Step S42, the described battery sheet that filters out is aligned.
In general, the solar battery sheet that screens has certain quantity, and is in this step that the solar battery sheet of the edge current leakage that screens is aligned, one side and guarantee each solar battery sheet electric leakage up.
Step S43, the solar battery sheet after will arranging with frock clamp clamp, and carry out the wiping edging until detecting leakage current less than default thresholding.
Carrying out carrying out detection of electrical leakage behind the several times wiping edging, if leakage current then continues the wiping edging greater than default thresholding, otherwise, but process ends then, and this solar battery sheet classified as normal solar battery sheet.
Behind the wiping edging, the PN junction at solar battery sheet edge can be separated, as shown in Figure 5, thereby avoids edge current leakage.
In the present embodiment, in general the default thresholding of described leakage current can be adjusted according to different demands, and described default thresholding is 2A to 3A, and the preferred threshold value is 3A.
The embodiment of the invention sorts out edge current leakage above the solar battery sheet of presetting thresholding after, separate by the PN junction of mechanical force the solar battery sheet edge, concrete, carry out the wiping edging after adopting frock clamp to clamp, the leak electricity PN junction at edge of solar cell is separated, thereby reduced leakage current, improved the electrical property of solar battery sheet.
The effect of the poor efficiency solar cell processing method of the embodiment of the invention is described with concrete experimental data below.
The edge current leakage electric current that filters out multi-disc surpasses the solar battery sheet of default thresholding, the raw material of these solar battery sheets are P type 125 monocrystalline silicon pieces, resistivity is 0.5-3 Ω cm, afterwards, select 19 solar battery sheets at random, carry out electric performance test, the scheme that provides according to the embodiment of the invention carries out carrying out electric performance test behind the wiping edging subsequently.
The unit for electrical property parameters that the scheme that provides according to the embodiment of the invention is carried out wiping edging front and back is provided respectively for table 1 and table 2.
Table 1
Table 2
By table 1 and table 2 as can be seen, the present invention can reduce leakage current significantly, improves the transfer ratio of battery sheet.
Fig. 6 shows a kind of structure of the frock clamp that is used to clamp solar battery sheet in the said method, and as shown in the figure, this frock clamp comprises first clamping plate 1, second clamping plate 2 and degree of tightness part 3, wherein:
, the in opposite directions setting identical with second clamping plate, 2 structures of first clamping plate 1, first clamping plate 1 and second clamping plate 2 face in opposite directions are that medial surface is the plane, in order to the clamping solar panel, and can not damage solar panel.
Degree of tightness part 3 in this structure is specially fastening bolt, and the one end is a nut, and the other end passes the screw of described first clamping plate 1 and second clamping plate, 2 both sides successively, is distance between scalable first clamping plate 1 and second clamping plate 2 by screwing this fastening bolt.
Preferably, described screw is positioned at the middle part of first clamping plate 1 and second clamping plate 2.
When stating the processing method of electric leakage solar battery sheet on the implementation, after folding neatly to the multi-disc solar battery sheet, electric leakage on one side up, after putting the space between first clamping plate 1 and second clamping plate 2 into, screw described fastening bolt, clamped until described solar battery sheet, be one side of each sheet solar battery sheet electric leakage of available emery cloth wiping then.
In other embodiments, described degree of tightness part can also be other forms, so long as the distance that can regulate between first clamping plate 1 and second clamping plate 2 gets final product.The present invention does not limit the concrete form of degree of tightness part.
Fig. 7 shows the another kind of structure of the frock clamp that is used to clamp solar battery sheet in the said method, this structure is to increase a handle that is convenient for carrying 4 on the basis of structure shown in Figure 6, this handle 4 can be arranged on first clamping plate, 1 lateral surface, also can be arranged on the lateral surface of second clamping plate 2.
The concrete structure of this handle can be the handle of an assurance, also can be structure as shown in Figure 8, comprises first fixed part 41, second fixed part 42 and connecting rod 43, wherein:
First fixed part 41 is connected described first clamping plate 1 or second clamping plate, 2 upper and lower sides respectively with second fixed part 42, connecting rod 43 connects described first fixed part 41 and second fixed part 42, has between the lateral surface (lateral surfaces of first clamping plate 1 or second clamping plate 2) of described connecting rod 43 and described first fixed part 41 of installation and second fixed part 42 and can hold the distance that finger passes.
Described first fixed part 41 and second fixed part 42 lay respectively at the medium position of described first clamping plate 1 or second clamping plate, 2 upper and lower sides.
The user can lift this frock clamp by holding connecting rod 43, and is more convenient laborsaving.
Described first fixed part 41 and second fixed part 42 can be by being threaded, as shown in Figure 9.
Figure 10 shows a kind of concrete shape of described first clamping plate 1 and second clamping plate 2, as shown in the figure, first clamping plate 1 and 2 liang of middle side parts of second clamping plate stretch out, form hangers shape outstanding 5 and hangers shape outstanding 5 ', the screw that fastening bolt 3 is installed is arranged on described hangers shape outstanding 5 and the hangers shape outstanding 5 ', and this mode can be saved splint material.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.
Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (9)
1. the processing method of the solar battery sheet that leaks electricity is characterized in that, comprising:
From the finished product solar battery sheet, filter out the solar battery sheet of electric leakage greater than default thresholding;
The described battery sheet that filters out is aligned, clamp with frock clamp, and carry out the wiping edging up to detecting battery sheet leakage current less than default thresholding.
2. method according to claim 1 is characterized in that, described default thresholding is 2A to 3A.
3. method according to claim 1 is characterized in that, described default thresholding is 3A.
4. a frock clamp that is used for the processing method of any described electric leakage solar battery sheet of claim 1-3 is characterized in that, comprising:
Structure first clamping plate and second clamping plate identical, that be provided with in opposite directions, first clamping plate and second clamping plate face in opposite directions are that medial surface is the plane;
Be arranged at described first clamping plate and the second clamping plate both sides, be used to regulate the degree of tightness part of distance between first clamping plate and second clamping plate.
5. frock clamp according to claim 4 is characterized in that, also comprises: the handle that is arranged on first clamping plate or the second clamping plate lateral surface.
6. frock clamp according to claim 5 is characterized in that, described handle comprises:
First fixed part and second fixed part that connect described first clamping plate or the second clamping plate upper and lower side respectively;
The connecting rod that connects described first fixed part and second fixed part, described connecting rod and install to have between the lateral surface of described first fixed part and second fixed part and can hold the distance that finger passes.
7. frock clamp according to claim 5 is characterized in that, described first fixed part and second fixed part are positioned at the medium position of described first clamping plate or the second clamping plate upper and lower side respectively.
8. frock clamp according to claim 4 is characterized in that, described degree of tightness part is a fastening bolt, and an end of this fastening bolt passes the screw of described first clamping plate and the second clamping plate both sides successively.
9. frock clamp according to claim 8 is characterized in that, described screw is positioned at the middle part of described first clamping plate and the second clamping plate both sides.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105711016A CN102185014A (en) | 2010-12-02 | 2010-12-02 | Treatment method of leaked solar battery plates and tool clamp applying the method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105711016A CN102185014A (en) | 2010-12-02 | 2010-12-02 | Treatment method of leaked solar battery plates and tool clamp applying the method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621358A (en) * | 2012-03-31 | 2012-08-01 | 英利能源（中国）有限公司 | Connection adapter for test of photovoltaic module |
| CN103280494A (en) * | 2013-06-14 | 2013-09-04 | 奥特斯维能源（太仓）有限公司 | Method for repairing crystalline silicon solar cell with leaky edges |
| CN103746042A (en) * | 2014-01-26 | 2014-04-23 | 内蒙古日月太阳能科技有限责任公司 | Etching method of solar cell piece |
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| JPS60234378A (en) * | 1984-05-07 | 1985-11-21 | Agency Of Ind Science & Technol | Manufacture of solar cell |
| CN101404308A (en) * | 2008-11-13 | 2009-04-08 | 中山大学 | Solar cell renovation method by utilizing patch renovation method |
| CN101789465A (en) * | 2010-01-08 | 2010-07-28 | 中山大学 | Defect remedying method of crystalline silicon solar cell |
| CN201570509U (en) * | 2009-12-11 | 2010-09-01 | 中国南玻集团股份有限公司 | Plasma edging clamp for solar battery |
| CN101853898A (en) * | 2010-03-31 | 2010-10-06 | 晶澳(扬州)太阳能光伏工程有限公司 | Process for preparing N-type crystalline silicon solar cell |
| CN101853899A (en) * | 2010-03-31 | 2010-10-06 | 晶澳(扬州)太阳能光伏工程有限公司 | Method for preparing solar cell by using local area back field |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60234378A (en) * | 1984-05-07 | 1985-11-21 | Agency Of Ind Science & Technol | Manufacture of solar cell |
| CN101404308A (en) * | 2008-11-13 | 2009-04-08 | 中山大学 | Solar cell renovation method by utilizing patch renovation method |
| CN201570509U (en) * | 2009-12-11 | 2010-09-01 | 中国南玻集团股份有限公司 | Plasma edging clamp for solar battery |
| CN101789465A (en) * | 2010-01-08 | 2010-07-28 | 中山大学 | Defect remedying method of crystalline silicon solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621358A (en) * | 2012-03-31 | 2012-08-01 | 英利能源（中国）有限公司 | Connection adapter for test of photovoltaic module |
| CN102621358B (en) * | 2012-03-31 | 2014-04-16 | 英利能源（中国）有限公司 | Connection adapter for test of photovoltaic module |
| CN103280494A (en) * | 2013-06-14 | 2013-09-04 | 奥特斯维能源（太仓）有限公司 | Method for repairing crystalline silicon solar cell with leaky edges |
| CN103746042A (en) * | 2014-01-26 | 2014-04-23 | 内蒙古日月太阳能科技有限责任公司 | Etching method of solar cell piece |
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Application publication date: 20110914 |