CN205564768U - Front -face electrode structure of solar battery - Google Patents
Front -face electrode structure of solar battery Download PDFInfo
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- CN205564768U CN205564768U CN201620380954.4U CN201620380954U CN205564768U CN 205564768 U CN205564768 U CN 205564768U CN 201620380954 U CN201620380954 U CN 201620380954U CN 205564768 U CN205564768 U CN 205564768U
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Abstract
The utility model belongs to the technical field of solar cell, especially, relate to a front -face electrode structure of solar battery, this front electrode package draws together the silver -colored grid line that prints on the positive surface of P type silicon substrate, prints the wire on the silver -colored grid line after the metallization is handled, and the wire passes through the tin cream and is connected with silver -colored grid line, this preparation method adopts screen -printing technique to pass through making herbs into wool, the diffusion, the after -clearing, print silver -colored grid line with printing back electrode technology on the positive surface of the P type silicon substrate after the coating film is handled, then adopt the silver -colored grid line of wire printing machine after the metallization is handled to print the wire electrode on the surface, the wire connects through the tin cream with silver -colored grid line is in the same place, the advantage has replaced the silver -colored grid line of part on the electrode of front with the copper electrode, the silver -colored grid line quantity of silicon solar cell's front electrode has been reduced, thereby silicon solar cell's manufacturing cost has been reduced, the copper electrode has higher height in addition, promotes the grid line aspect ratio, raises the efficiency.
Description
Technical field
This utility model belongs to technical field of solar batteries, particularly relates to the electrode structure at right side of a kind of solaode.
Background technology
Currently, in the photovoltaic industry of the whole world, the solaode of the overwhelming majority is all based on the crystal silicon solar batteries that crystalline silicon makes,
Also having fraction photovoltaic cell is to utilize other materials to make.Traditional crystal silicon solar energy battery front electrode overwhelming majority is all adopted
Make by the mode of traditional silk-screened, but also having sub-fraction crystal silicon battery is that profit makes in other ways, such as photoetching electricity
Plating, ink-jet, etc..Traditional screen printed cells uses silver as electrode material, and cost is high；It is limited to current half tone make simultaneously
Precision, silk screen printing thin grid line width width, depth-width ratio is little, causes the front electrode made to have bigger front electrode to be lost, bag
Include shading loss, resistance loss, recombination loss etc..Increasing solaode enterprise is had to begin with secondary double exposure recently
Mode add the height of thin grid line, but this mode adds the cost of silver simultaneously.Although other make the method for front electrode
Relatively thin finger grid line can be produced, but the most significantly put forward process complexity simultaneously, so being not to be suitable for a large amount of industry metaplasia
The low-cost technologies produced.For being effectively facilitated solaode and photovoltaic system cost continuous decrease and realizing " putting down on essential meaning
Valency is surfed the Net ", solar photovoltaic generation system must constantly develop to the direction of high efficiency, low cost.But, the current silicon sun
The cost of the silver grating line of energy used in battery account for the 15% of whole silicon solar cell manufacturing cost, and the cost of silver grating line is higher,
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 the electrode structure at right side of a kind of solaode, it is provided that a kind of technique is simple, low cost,
What efficiency was high is applicable to the processing technology of the front electrode of solar battery of industrialized production.
For achieving the above object, this utility model is by the following technical solutions:
The electrode structure at right side of a kind of solaode, including being equidistantly evenly distributed on the silver grating line in silicon substrate front, equidistantly setting
Put the adhesive spots on silver grating line and the tinsel being connected by adhesive spots with silver grating line；Every wire is arranged on the silver grating line of correspondence
On；Adhesive spots is tin cream solder joint or electrically conducting transparent glue.
Described width wiry is less than the width of silver grating line.
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.
Generally circular in shape, the rectangle of adhesive spots or rhombus；Circular adhesive dot thickness is 0.02～0.15mm, spot size is
0.015～0.10mm.
Described diameter wiry is 0.01～0.08mm；Shape of cross section wiry is rectangle, trapezoidal, triangle, circle
Or it is oval.
Described tinsel is copper wire, silver-gilt copper wire or B alloy wire.
The preparation method of the electrode structure at right side of a kind of solaode, comprises the following steps:
1) through making herbs into wool, diffusion, after clean, plated film and printed back electrode process process after silicon substrate surface screen-printed
One layer of silver grating line, 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
For 3000-8000mm/ minute, sintering temperature was 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 200-300mm/s；
4) print tinsel in adhesive spots after printing, print the copper cash printer that simultaneously passes through wiry by tinsel and silver grating line
Bond together.
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, tin cream solder joint and tinsel, and tinsel is parallel with silver grating line to be set
Put and be connected together by tin cream solder joint, being the part silver grating line that instead of on front electrode with copper electrode, reduce the silicon sun
The consumption of the front electrode silver of battery, thus reduce the manufacturing cost of silicon solar cell；Additionally copper electrode has higher height,
Promote grid line depth-width ratio, improve efficiency.
Method of the present utility model is after passing through making herbs into wool, diffusion, rear cleaning, plated film and the process of printed back electrode process
P-type silicon matrix front surface on print silver grating line, then print solder paste solder joint on the silver grating line surface after metalized
(solder joint is at least 2), is re-used copper cash printer and tinsel and silver grating line is welded together by soldered technique, this
Mode significantly reduces the manufacturing cost of the front electrode of silicon solar cell, improves the depth-width ratio of front electrode, thus reduces
The manufacturing cost of silicon solar cell, improves the conversion efficiency of solaode.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this utility model solar battery front side one strip electrode.
Fig. 2 is the structural representation of the front electrode of this utility model solaode.
In figure, 1 is silver grating line；2 is adhesive spots；3 is tinsel.
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 solar-electricity electrode structure front one strip electrode structure, this front electrode includes being printed in P-type silicon matrix 4
Front surface on wire silver grating line 1, on the silver grating line 1 after metallized process print tinsel 3, tinsel 3 passes through tin cream
Solder joint 2 is connected with silver grating line 1.
Such as Fig. 2, the front electrode of a kind of silicon solar cell of this utility model, including P-type silicon base 4, at P-type silicon matrix 4
Print on front surface a slice width degree be 0.02～0.08mm, thickness be 0.005～0.030mm wire silver grating line 1；Through metal
Change process after silver grating line 1 on by silk screen printing print solder paste solder joint 2, solder joint thickness 0.02～0.15mm, spot size be
0.015～0.50mm, solder joint number be at least 2, pad patterns can be other geometric figures such as circle, rectangle, rhombus；?
Printing tinsel 3 by copper cash printer on solder joint after printing, the diameter of tinsel 3 is 0.01～0.08mm, and tinsel 3 can
Think filamentary silver, copper wire, silver-gilt copper wire or B alloy wire, preferably copper wire.The shape of cross section of tinsel 3 can be rectangle, trapezoidal,
The figures such as triangle, circle, ellipse；Print the copper cash printer that simultaneously passes through wiry to be welded with silver grating line 1 by tinsel 3
Together, welding temperature is at 80～300 DEG C.
In the present embodiment, the metalized of silver grating line 1 is carried out in chain-type sintering furnace, and copper cash print is printed and be welded on to tinsel 3
Complete on machine processed.
In specific implementation process, the width of the silver grating line 1 being printed on the front surface of P-type silicon matrix 4 is 0.05mm, thickness
For 0.01mm, the solder joint being printed on the silver grating line after metalized 1 is circle, thickness at 0.06mm, a diameter of 0.05mm,
Number is 156, prints a diameter of 0.04mm wiry, welding temperature 150 DEG C.
The preparation process of the front electrode of silicon solar cell of the present utility model is:
1. at the back of the body passing through the P-type silicon matrix 4 after making herbs into wool, diffusion, rear cleaning, plated film and printed back electrode process process
Face printed back electrode and back surface field, the most on the front surface printing last layer width be 0.05mm, thickness be the silver-colored grid of 0.01mm
Line 1, the preparation of this silver grating line 1 uses silk-screen printing technique, and 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 1 and the backplate being printed on the back surface of P-type silicon matrix 4 are carried out metalized, metallization
Carrying out in chain-type sintering furnace, 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 2 on silver grating line 1 surface after metalized, solder joint thickness 0.06mm,
Spot size is 0.05mm, solder joint number 156, solder joint are equally spaced；Its process conditions are: squeegee pressure is 140N, speed
Degree 200mm/s, spot size is 0.05mm, and wire mesh membrane thickness is 0.005mm.
Printing cross section by copper cash printer on solder joint 2 the most after printing is circular tinsel 3, and diameter wiry exists
0.05mm, prints the copper cash printer that simultaneously passes through wiry and is welded together with silver grating line 1 by tinsel 3, and welding temperature exists
150℃。
The foregoing is only a kind of embodiment of the present utility model, be not all of or unique embodiment, ordinary skill
The conversion of any equivalence that technical solutions of the utility model are taked by personnel by reading this utility model description, is this practicality
Novel claim is contained.
Claims (7)
1. the electrode structure at right side of a solaode, it is characterised in that include just equidistantly being evenly distributed on silicon substrate (4)
The silver grating line (1) in face, the adhesive spots (2) being set in qually spaced on silver grating line (1) and by adhesive spots (2) and silver grating line (1)
The tinsel (3) connected；Every wire (3) is arranged on the silver grating line (1) of correspondence；Adhesive spots (2) is tin cream solder joint
Or electrically conducting transparent glue.
The electrode structure at right side of a kind of solaode the most according to claim 1, it is characterised in that described tinsel
(3) width is less than the width of silver grating line (1).
The electrode structure at right side of a kind of solaode the most according to claim 1, it is characterised in that described silver grating line
(1) width is 0.02～0.08mm, thickness is 0.005～0.030mm.
The electrode structure at right side of a kind of solaode the most according to claim 1, it is characterised in that every silver grating line (1)
Upper at least 2 adhesive spots (2).
The electrode structure at right side of a kind of solaode the most according to claim 1, it is characterised in that adhesive spots (2)
Generally circular in shape, rectangle or rhombus；Circular adhesive point (2) thickness is 0.02～0.15mm, spot size is 0.015～0.10mm.
The electrode structure at right side of a kind of solaode the most according to claim 1, it is characterised in that described tinsel
(3) diameter is 0.01～0.08mm；The shape of cross section of tinsel (3) is rectangle, trapezoidal, triangle, circular or oval
Shape.
The electrode structure at right side of a kind of solaode the most according to claim 1, it is characterised in that described tinsel
(3) it is copper wire, silver-gilt copper wire or B alloy wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620380954.4U CN205564768U (en) | 2016-04-28 | 2016-04-28 | Front -face electrode structure of solar battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620380954.4U CN205564768U (en) | 2016-04-28 | 2016-04-28 | Front -face electrode structure of solar battery |
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| Publication Number | Publication Date |
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| CN205564768U true CN205564768U (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620380954.4U Active CN205564768U (en) | 2016-04-28 | 2016-04-28 | Front -face electrode structure of solar battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789345A (en) * | 2016-04-28 | 2016-07-20 | 泰州乐叶光伏科技有限公司 | Front side electrode structure of solar cell and manufacturing method thereof |
| CN117410387A (en) * | 2023-12-15 | 2024-01-16 | 晶澜光电科技(江苏)有限公司 | Thin grid structure of crystalline silicon solar cell and preparation method thereof |
-
2016
- 2016-04-28 CN CN201620380954.4U patent/CN205564768U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789345A (en) * | 2016-04-28 | 2016-07-20 | 泰州乐叶光伏科技有限公司 | Front side electrode structure of solar cell and manufacturing method thereof |
| CN105789345B (en) * | 2016-04-28 | 2018-03-09 | 泰州隆基乐叶光伏科技有限公司 | A kind of electrode structure at right side of solar cell and preparation method thereof |
| CN117410387A (en) * | 2023-12-15 | 2024-01-16 | 晶澜光电科技(江苏)有限公司 | Thin grid structure of crystalline silicon solar cell and preparation method thereof |
| CN117410387B (en) * | 2023-12-15 | 2024-02-09 | 晶澜光电科技(江苏)有限公司 | Thin grid structure of crystalline silicon solar cell and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
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. |