CN205789998U - A kind of solaode primary gate electrode structure - Google Patents
A kind of solaode primary gate electrode structure Download PDFInfo
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- CN205789998U CN205789998U CN201620379727.XU CN201620379727U CN205789998U CN 205789998 U CN205789998 U CN 205789998U CN 201620379727 U CN201620379727 U CN 201620379727U CN 205789998 U CN205789998 U CN 205789998U
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Abstract
This utility model belongs to technical field of solar batteries, particularly relate to the primary gate electrode structure of a kind of solaode, this front electrode includes thin grid silver electrode, and the thin grid silver electrode after metallized process is printed tinsel, and tinsel is connected with silver electrode by adhesive spots；This preparation method uses prints thin grid silver electrode on the front surface of silk-screen printing technique P-type silicon matrix after passing through making herbs into wool, diffusion, rear cleaning, plated film and printing back electrode back surface field PROCESS FOR TREATMENT, then tinsel primary gate electrode is printed in the silver electrode surface after metalized, tinsel and silver electrode are linked together by adhesive spots, advantage is to instead of front main grid silver electrode with copper electrode, reduce the silver electrode consumption of the front electrode of silicon solar cell, thus reduce the manufacturing cost of silicon solar cell；Additionally use copper electrode and replace burn-through resistance silver slurry, reduce the broken of passivating film and change, improve surface passivation efficiency, promote battery efficiency.
Description
Technical field
This utility model belongs to technical field of solar batteries, particularly relates to a kind of solaode primary gate electrode structure.
Background technology
Currently, the main component of the electrode material (referring mainly to secondary grid and main grid) of solar cell is silver, and the cost of silver accounts for the 15% of current solaode, and consumption is huge and expensive.Reducing the manufacturing cost of solaode, on the premise of to electrical property without negative effect, the consumption reducing Ag is most important.
As it is shown on figure 3, the front electrodes of solar cells of prior art is generally designed by the continuous main grid 3 that secondary grid 2 are vertical.The electric current produced in battery flows to the surface of battery from the inside of battery, then laterally through top doped layer, the finally contact at top surface is collected on secondary grid 2, and electric current arrives on main grid 3 along secondary grid 2, but such structure, the silver-colored consumption wherein making main grid is the biggest.The mode beginning with two-shot chromatography (main grid after secondary grid or the most secondary grid after first main grid) now with increasing solaode enterprise reduces silver slurry cost, secondary grid 2 use common front burn-through resistance silver slurry, main grid 3 uses non-burn-through resistance silver slurry (lower than secondary grid slurry about 20%) that price is relatively inexpensive, and this structure can slightly reduce cost.For being effectively facilitated solaode and photovoltaic system cost continuous decrease " the par online " realizing on essential meaning, solar photovoltaic generation system must constantly develop to the direction of high efficiency, low cost.The cost of silver electrode account for the 15% of whole silicon solar cell manufacturing cost and expensive, and this just makes the relatively costly of silicon solar cell, causes silicon solar cell to widely popularize.
Utility model content
The purpose of this utility model is to provide a kind of solaode primary gate electrode structure, it is provided that the processing technology of the front electrode of solar battery being applicable to industrialized production that a kind of technique is simple, low cost, efficiency are high.
For achieving the above object, this utility model is by the following technical solutions:
A kind of solaode primary gate electrode structure, including being equidistantly evenly distributed on the silver grating line in silicon substrate front, the adhesive spots being set in qually spaced on silver grating line and the tinsel being connected by adhesive spots with silver grating line；Described tinsel is crisscross arranged with silver grating line.
Described adhesive spots is tin cream solder joint or conducting resinl.
The width of described silver grating line is 0.02～0.08mm, thickness is 0.005～0.030mm.
Every silver grating line is 2 adhesive spots less；Tinsel is vertically arranged with silver grating line.
Generally circular in shape, the rectangle of adhesive spots or rhombus；Circular adhesive dot thickness is 0.02～0.15mm, spot size is 0.015～0.50mm.
Described diameter wiry is 0.01～0.08mm；Shape of cross section wiry is rectangle, trapezoidal, triangle, circular or oval.
Described tinsel is filamentary silver, copper wire, silver-gilt copper wire or B alloy wire.
The preparation method of a kind of solaode primary gate electrode structure, comprises the following steps:
1) through making herbs into wool, diffusion, after clean, one layer of silver grating line of silicon substrate surface screen-printed after plated film and printed back electrode back surface field PROCESS FOR TREATMENT, silk-screen printing technique is: squeegee pressure is 80-200N, speed 100-300mm/s；
2) silicon substrate printing silver grating line being carried out in chain-type sintering furnace metalized, metallization process is: belt speed is 3000-8000mm/ minute, and sintering temperature is 700-900 DEG C；
3) by silk screen printing adhesive spots on the silver grating line surface after metalized, silk-screen printing technique is: squeegee pressure is 80-200N, speed 700-900mm/s；
4) print tinsel in adhesive spots after printing, print and wiry by copper cash printer, tinsel is bonded together with silver grating line simultaneously.
When adhesive spots is tin cream solder joint, welding temperature is 80～300 DEG C.
Compared with prior art, this utility model has a following useful technique effect:
Battery front side electrode of the present utility model is to be made up of silver grating line, adhesive spots and tinsel, tinsel and silver grating line are crisscross arranged and are connected together by tin cream solder joint, the part silver grating line on front electrode is instead of with tinsel (such as copper), reduce the consumption of the front electrode silver of silicon solar cell, thus reduce the manufacturing cost of silicon solar cell；Additionally copper electrode has higher height, promotes grid line depth-width ratio, improves efficiency.And reduce the broken of passivating film to change, improve surface passivation efficiency, improve the conversion efficiency of solaode.
Method of the present utility model is to pass through making herbs into wool, diffusion, rear cleaning, silver grating line is printed on the front surface of the P-type silicon matrix after plated film and printed back electrode back surface field PROCESS FOR TREATMENT, then print solder paste solder joint (or conducting resinl) (solder joint is at least 2) on the silver grating line surface after metalized, re-use copper cash printer tinsel and silver electrode to be welded together by soldered technique, the manufacturing cost that this mode significantly reduces the front electrode of silicon solar cell is (different according to figure, front silver electrode consumption reduces by 30%～60%), reduce the broken of passivating film to change, improve surface passivation efficiency, improve the conversion efficiency of solaode.
Accompanying drawing explanation
Fig. 1 is conventional batteries front electrode schematic diagram；
Fig. 2 is this utility model main grid battery front side electrode schematic diagram.
Fig. 3 is along tinsel generalized section；
Fig. 4 is along silver grating line generalized section；
In figure, 1 is silicon substrate, and 2 is secondary grid；3 is main grid；4 is adhesive spots；5 is tinsel, and 6 is silver grating line.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
As it is shown in figure 1, be conventional batteries electrode structure at right side, this front electrode includes the secondary grid 2 being arranged on the front surface of P-type silicon matrix 1 and the main grid 3 being crisscross arranged with secondary grid 2.
As in figure 2 it is shown, the utility model proposes the front electrode of a kind of new silicon solar cell, including P-type silicon base 1, the front surface of P-type silicon matrix 1 is printed with a slice width degree be 0.02～0.08mm, thickness be 0.005～0.030mm silver grating line 6；By silk screen printing print solder paste solder joint (or conducting resinl) 4 as adhesive spots on silver grating line 6 after metallized process, tin cream solder joint (or conducting resinl) 4 thickness is 0.02～0.15mm, tin cream solder joint (or conducting resinl) 4 a diameter of 0.02～0.10mm, tin cream solder joint (or conducting resinl) 4 number be at least 2, tin cream solder joint (or conducting resinl) figure can be other geometric figures such as circle, rectangle, rhombus；Tinsel 5 is printed by copper cash printer on tin cream solder joint (or conducting resinl) after printing, the diameter of tinsel 5 is 0.5～2.0mm, tinsel 5 is filamentary silver, copper wire, silver-gilt copper wire or B alloy wire, and the shape of cross section of tinsel 5 can be the figure such as rectangle, trapezoidal, triangle, circle, ellipse；Being welded with silver grating line 6 by tinsel 5 by copper cash printer while printing tinsel 5 and be solidified togather, welding solidification temperature is at 80～300 DEG C.
In the present embodiment, the metalized of silver grating line 6 is carried out in chain-type sintering furnace, and tinsel 5 is printed and welded to be solidificated on copper cash printer and completes.
In specific implementation process, the width of the silver grating line 6 being printed on the front surface of P-type silicon matrix 1 is 0.05mm, thickness is 0.01mm, the tin cream solder joint 4 being printed on the silver electrode after metalized 5 is circle, thickness is at 0.06mm, a diameter of 0.05mm, number (90 solder joints in every wire 5 that are 360,4 wire 5 totally 360 solder joints, bond pad locations is silver grating line 6 and tinsel 5 crossover location), print tinsel 5 cross section be rectangle length 154.75mm, width 1mm, height for 0.04mm, welding temperature 150 DEG C.
The preparation process of the front electrode of silicon solar cell of the present utility model is:
1. back up backplate and the back surface field of the P-type silicon matrix 1 after making herbs into wool, diffusion, rear cleaning, plated film and printed back electrode process process are being passed through, the most on the front surface printing last layer width be 0.05mm, thickness be the silver grating line 6 of 0.01mm, the preparation of this silver grating line 6 uses silk-screen printing technique, its process conditions are: squeegee pressure is 140N, speed 200mm/s, the a width of 0.05mm of web lines, wire mesh membrane thickness is 0.008mm.
2. above-mentioned silver grating line 6 and the backplate back surface field being printed on the back surface of P-type silicon matrix 1 being carried out metalized, metallization is carried out in chain-type sintering furnace, and process conditions are: belt speed is 6000mm/ minute, and sintering temperature is 860 DEG C.
3. by silk screen printing print solder paste solder joint 4 in the silver electrode surface after metalized, thickness is at 0.06mm, a diameter of 0.05mm, number (90 solder joints, 4 wire 5 totally 360 solder joints in every wire 5 that are 360, bond pad locations is silver grating line 6 and tinsel 5 crossover location), its process conditions are: squeegee pressure is 140N, speed 200mm/s, spot size is 0.05mm, and wire mesh membrane thickness is 0.005mm.
Print, by copper cash printer, the tinsel 5 that cross section is rectangle on solder joint the most after printing, tinsel 5 length 154.75mm, width 1mm, height are 0.04mm, printing and wiry welded together with silver grating line by tinsel by copper cash printer simultaneously, welding temperature is at 150 DEG C.
The foregoing is only a kind of embodiment of the present utility model, it is not all of or unique embodiment, the conversion of any equivalence that technical solutions of the utility model are taked by those of ordinary skill in the art by reading this utility model description, is claim of the present utility model and is contained.
Claims (7)
1. a solaode primary gate electrode structure, it is characterized in that, the adhesive spots (4) including the silver grating line (6) being equidistantly evenly distributed on silicon substrate (1) front, being set in qually spaced on silver grating line (6) and the tinsel (5) being connected with silver grating line (6) by adhesive spots (4)；Described tinsel (5) is arranged with silver grating line (6) vertical interlaced.
A kind of solaode primary gate electrode structure the most according to claim 1, it is characterised in that described adhesive spots (4) is tin cream solder joint or conducting resinl.
A kind of solaode primary gate electrode structure the most according to claim 1, it is characterised in that the width of described silver grating line (6) is 0.02～0.08mm, thickness is 0.005～0.030mm.
A kind of solaode primary gate electrode structure the most according to claim 1, it is characterised in that at least 2 adhesive spots (4) on every silver grating line (6).
A kind of solaode primary gate electrode structure the most according to claim 1, it is characterised in that generally circular in shape, the rectangle of adhesive spots (4) or rhombus；Circular adhesive point (4) thickness is 0.02～0.15mm, spot size is 0.015～0.5mm.
A kind of solaode primary gate electrode structure the most according to claim 1, it is characterised in that the diameter of described tinsel (5) is 0.01～0.08mm；The shape of cross section of tinsel (5) is rectangle, trapezoidal, triangle, circular or oval.
A kind of solaode primary gate electrode structure the most according to claim 1, it is characterised in that described tinsel (5) is copper wire, silver-gilt copper wire or B alloy wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620379727.XU CN205789998U (en) | 2016-04-28 | 2016-04-28 | A kind of solaode primary gate electrode structure |
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| CN201620379727.XU CN205789998U (en) | 2016-04-28 | 2016-04-28 | A kind of solaode primary gate electrode structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702759A (en) * | 2016-04-28 | 2016-06-22 | 泰州乐叶光伏科技有限公司 | Main grid electrode structure of solar cell and preparation method thereof |
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2016
- 2016-04-28 CN CN201620379727.XU patent/CN205789998U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702759A (en) * | 2016-04-28 | 2016-06-22 | 泰州乐叶光伏科技有限公司 | Main grid electrode structure of solar cell and preparation method thereof |
| CN105702759B (en) * | 2016-04-28 | 2018-03-09 | 泰州隆基乐叶光伏科技有限公司 | A kind of solar cell primary gate electrode structure and preparation method thereof |
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Address after: 225314 Jiangsu Province, Taizhou City Hailing Xingtai Road No. 268 Patentee after: Taizhou long base music Photovoltaic Technology Co., Ltd. Address before: 225314 Jiangsu Province, Taizhou City Hailing District South Road Taizhou Xingtai Leye Photovoltaic Technology Co. Ltd. Patentee before: TAIZHOU LEYE PHOTOVOLTAIC TECHNOLOGY CO., LTD. |
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