CN209119121U - Cell piece and photovoltaic module - Google Patents
Cell piece and photovoltaic module Download PDFInfo
- Publication number
- CN209119121U CN209119121U CN201822269611.2U CN201822269611U CN209119121U CN 209119121 U CN209119121 U CN 209119121U CN 201822269611 U CN201822269611 U CN 201822269611U CN 209119121 U CN209119121 U CN 209119121U
- Authority
- CN
- China
- Prior art keywords
- pad
- cell piece
- hollow
- width
- main gate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000004411 aluminium Substances 0.000 claims abstract description 54
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 54
- 238000003466 welding Methods 0.000 claims abstract description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 abstract description 5
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 abstract description 5
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003854 Surface Print Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
Abstract
The utility model provides a kind of cell piece and photovoltaic module, including silicon wafer and it is formed in pad and aluminium paste portion that the several columns of silicon chip back side are spaced apart, wherein, the silicon chip back side is additionally provided with multiple hollow-out parts in a strip shape on each column pad extending direction, every one column pad of hollow-out parts corresponding matching, and multistage is split up by multiple pads on a column.Compared to the prior art, the beneficial effects of the utility model are: welding will not and pad padded by aluminium paste portion can directly contact, the possibility of rosin joint can be greatly reduced.
Description
Technical field
The utility model relates to solar battery manufacturing field more particularly to a kind of cell pieces and photovoltaic module.
Background technique
Existing crystal silicon solar cell sheet multi-pass crosses the gate line electrode made from silicon chip surface printing, sintering etc. and collects electricity
Stream, by the optimization design to gate line electrode, is able to ascend cell piece power gain.
Fig. 1 show a kind of back electrode structure of double-side cell piece 10 comprising several spaced pads 101,
Aluminium main gate line 103 that several lengthwises extend several is laterally extended aluminium pair grid line 105.The pad 101 can be with by scolding tin
Welding is (not shown) to be connected.The pad 101 is that silver paste material prints.
The aluminium pair grid line 105 is arranged perpendicular to the aluminium main gate line 103, and electric current converges after being collected by aluminium pair grid line 105
It conducts to aluminium main gate line 103, then by aluminium main gate line 103 to the pad 101, so as to pass through pad 101 for electric current
It conducts to welding, and then is transmitted to external circuit.
In addition, improving the welding pulling force between welding and double-side cell piece, along the aluminium main grid to reduce failure welding
The lengthwise extending direction of line 103 is equipped with hollow-out parts 107 between pad 101 and aluminium main gate line 103.
In general, aluminium paste with a thickness of 20-40um, and silver paste only has 3-8um, this leads to aluminium main gate line 103 and pad 101
Between there are differences in height.In addition, welding has certain rigidity, this meeting will be so that the aluminium main gate line 103 at 101 both ends of pad will weld
With padded, when welding and pad 101 being caused to connect, it is easy to happen rosin joint.
Summary of the invention
The purpose of this utility model is to provide a kind of cell piece and photovoltaic modulies to be avoided by not printing aluminium main gate line
Problem of faulty soldering when welding is connected with pad.
To realize that above-mentioned purpose of utility model, one embodiment of the utility model provide a kind of cell piece, including silicon wafer
And it is formed in pad and aluminium paste portion that the several columns of silicon chip back side are spaced apart, wherein the silicon chip back side is additionally provided with every
Multiple hollow-out parts in a strip shape on column pad extending direction, every one column pad of hollow-out parts corresponding matching, and by a column
Multiple pads be split up into multistage.
Further, in one embodiment of the utility model, the hollow-out parts of multistage are set to two positioned at a column
Between two pads and between pad and cell piece edge.
Further, in one embodiment of the utility model, the aluminium paste portion is the Al-BSF of the cell piece.
Further, in one embodiment of the utility model, the aluminium paste portion includes: several columns and the pad pair
The aluminium main gate line answered, along the lengthwise extending direction of aluminium main gate line, the hollow-out parts are located substantially at the central area of aluminium main gate line.
Further, in one embodiment of the utility model, the hollow-out parts include the hollow part with the first width
With the hollow part with the second width, the hollow part of first width is arranged close to the pad, and first width is big
In the second width.
Further, in one embodiment of the utility model, first width is of same size with the pad.
Further, in one embodiment of the utility model, a column aluminium main gate line is divided into two strips by the hollow-out parts
Main gate line, two strip main gate lines are electrically connected in the cell piece width direction and the pad.
Further, in one embodiment of the utility model, the pad is on the cell piece length direction
Both ends and two strip main gate lines are electrically connected.
Further, in one embodiment of the utility model, the aluminium main gate line is set as width gradual change, close to welding
Point one end ratio is wide far from pad end.
To realize above-mentioned purpose of utility model, embodiment further provides a kind of photovoltaic modulies for the utility model one, including
The cell piece and welding of multiple any of the above-described schemes, the welding and the pad are electrical connected, by multiple electricity
Pond piece electrically connects as cell piece string.
Compared to the prior art, the beneficial effects of the utility model are: welding will not be padded by aluminium paste portion and pad can
It directly contacts, the possibility of rosin joint can be greatly reduced.
Detailed description of the invention
Fig. 1 is the gate line electrode distribution schematic diagram of double-side cell piece back electrode structure in the prior art；
Fig. 2 is the gate line electrode distribution schematic diagram of cell piece back electrode structure in the utility model first embodiment；
Fig. 3 is the gate line electrode distribution schematic diagram of cell piece back electrode structure in the utility model second embodiment.
Fig. 4 is the gate line electrode distribution schematic diagram of cell piece back electrode structure in the utility model third embodiment.
The gate line electrode distribution schematic diagram of cell piece back electrode structure in the 4th embodiment of Fig. 5 the utility model.
Specific embodiment
The utility model is described in detail below with reference to embodiment shown in the drawings.But the embodiment is not
Limit the utility model, structure that those skilled in the art are made according to the embodiment, method or functionally
Transformation is all contained in the protection scope of the utility model.
Generally, photovoltaic module from it is upper and and under be cascading and have: foreboard, front layer packaging adhesive film, battery strings layer, after
Layer packaging adhesive film and backboard.
Wherein, battery strings layer includes the cell piece string in a row placed, and each cell piece string includes several placing in column
The cell piece string is made by the pad that welding is electrically connected adjacent cell piece above and below in cell piece.
As shown in Figures 2 to 5, in the embodiments of the present invention, the cell piece 20, including silicon wafer 201 and shape
It is spaced the pad 203 being uniformly arranged and aluminium paste portion 205 in column in 201 back side of silicon wafer, the pad 203 is silver paste material
Material prints.
201 back side of silicon wafer is additionally provided on the cell piece length direction that (X-direction in figure, wherein X-direction is each column
Pad extending direction and welding direction) multiple hollow-out parts 207 in a strip shape, every 207 corresponding matching one of hollow-out parts column weldering
Contact 203, and multistage is split up by multiple pads 203 on a column.
It is following to be illustrated respectively by the utility model first embodiment to the 4th embodiment.
As shown in Fig. 2, the cell piece 20 is single side cell piece, the aluminium in the utility model first embodiment
Slurry portion 205 is the Al-BSF 205 of the cell piece 20.The Al-BSF 205 is formed in the back side of the silicon wafer 201, sets thereon
There is the spaced pad 203 of multiple row, for being electrically connected with welding.
Several columns hollow-out parts 207 are additionally provided in the Al-BSF 205, every hollow-out parts 207 are accordingly connected to a column weldering
Contact 203, and multistage is split up by multiple pads 203 on a column.The hollow-out parts 207 for being namely split up into multistage are set to
Between the pad two-by-two 203 of a column and between 20 edge of pad 204 and cell piece.207 part of hollow-out parts does not print
Brush any aluminium paste.
In this way, since the both ends of pad 203 are continuously hollow-out parts 207, welding is not by aluminium paste and silver paste in welding
Difference in height influenced, welding is directly contacted with pad 203, reduces the possibility of rosin joint.
As shown in figure 3, the cell piece 20 is double-side cell piece in the utility model second embodiment comprising
Silicon wafer 201 and be formed in 201 back side of silicon wafer be spaced the pad 203 being uniformly arranged in column, the aluminium paste portion 205 includes a plurality of
Aluminium main gate line 2050 equipped with hollow-out parts 207.Along the welding direction (X-direction) of cell piece 20 and welding (not shown), pad
203 two sides are hollow-out parts 207 namely on the length direction of the cell piece, the hollow-out parts 207 are located substantially at described
One column aluminium main gate line 2050 is divided to for two strip main gate lines by the central area of aluminium main gate line 2050, i.e., the described hollow-out parts 207
20501,20503, two strip main gate lines 20501,20503 are in the cell piece width direction (the Y side vertical with X-direction in figure
To) and the pad 203 electric connection.Certainly, the aluminium paste portion 205 may also include a plurality of aluminium pair grid line 2055, in this reality
It applies in mode, the aluminium pair grid line 2055 is arranged perpendicular to the aluminium main gate line 2050,2055 collected current of aluminium pair grid line,
And electric current is reached into the aluminium main gate line 2050, then be transmitted to the pad after electric current being converged by the aluminium main gate line 2050
On 203.
In the present embodiment, the hollow-out parts 207 are set as hollow part 2071 with the first width and have second
The hollow part 2073 of width.Along the welding direction, the hollow part 2071 of first width is set close to the pad 203
It sets, first width is greater than the second width.In this way, not only can more easily pass through welding and the pad 203, but also as far as possible
Reduction shading-area.
It further, is the contact resistance i.e. convenient for welding, and as far as possible between the silver-colored aluminium of reduction, in present embodiment
In, first width is of same size with the welding 203.
As shown in figure 4, be in the utility model third embodiment with the distinctive points of above-mentioned second embodiment,
The hollow part 2071 of first width and the hollow part 2073 of the second width are wide, i.e., along the welding direction, hollow-out parts 207
For same width.And both ends of the pad 203 on 20 length direction of cell piece and two strip main gate lines 20501,
20503 are electrically connected.In this way, can further reduce the contact resistance between silver-colored aluminium.
As shown in figure 5, the distinctive points in the 4th embodiment of the utility model, with second, third above-mentioned embodiment
It is, the aluminium main gate line 2050 is set as width gradual change, wide far from 203 one end of pad close to 203 one end ratio of pad.?
That is the arc-shaped shape of aluminium main gate line, wider closer to the pad 203, it is narrower further away from the pad 203.
In this way, it is possible to reduce the shading-area of the aluminium main gate line.
In conclusion compared to the prior art, the utility model by along welding direction, at the both ends of pad, engrave by setting
Empty region does not print aluminium paste so that welding and welding be spot welded when, will not and pad padded by aluminium paste portion can directly connect
Touching, can be greatly reduced the possibility of rosin joint.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of cell piece including silicon wafer and is formed in pad and aluminium paste portion that the several columns of silicon chip back side are spaced apart,
It is characterized in that:
The silicon chip back side is additionally provided with multiple hollow-out parts in a strip shape on each column pad extending direction, and every hollow-out parts are corresponding
Multistage is split up into unification column pad, and by multiple pads on a column.
2. cell piece according to claim 1, which is characterized in that the hollow-out parts of multistage are set to two positioned at a column
Between two pads and between pad and cell piece edge.
3. cell piece according to claim 1, which is characterized in that the aluminium paste portion is the Al-BSF of the cell piece.
4. cell piece according to claim 1, it is characterised in that: the aluminium paste portion includes: several columns and the pad
Corresponding aluminium main gate line, along the lengthwise extending direction of aluminium main gate line, the hollow-out parts are located substantially at the central area of aluminium main gate line.
5. cell piece according to claim 4, it is characterised in that: the hollow-out parts include the hollow part with the first width
With the hollow part with the second width, the hollow part of first width is arranged close to the pad, and first width is big
In the second width.
6. cell piece according to claim 5, it is characterised in that: the width phase of first width and the pad
Together.
7. cell piece according to claim 4, it is characterised in that: a column aluminium main gate line is divided into two strips by the hollow-out parts
Main gate line, two strip main gate lines are electrically connected in the cell piece width direction and the pad.
8. cell piece according to claim 7, it is characterised in that: the pad is on the cell piece length direction
Both ends and two strip main gate lines are electrically connected.
9. cell piece according to claim 4, it is characterised in that: the aluminium main gate line is set as width gradual change, close to weldering
Contact one end ratio is wide far from pad end.
10. a kind of photovoltaic module, including cell piece as described in any one of claims 1-9 and welding, the welding and
The pad is electrical connected, and multiple cell pieces are electrically connected as battery strings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822269611.2U CN209119121U (en) | 2018-12-29 | 2018-12-29 | Cell piece and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822269611.2U CN209119121U (en) | 2018-12-29 | 2018-12-29 | Cell piece and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209119121U true CN209119121U (en) | 2019-07-16 |
Family
ID=67209044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822269611.2U Active CN209119121U (en) | 2018-12-29 | 2018-12-29 | Cell piece and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209119121U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736147A (en) * | 2019-10-15 | 2021-04-30 | 浙江爱旭太阳能科技有限公司 | Solar cell and method for producing the same |
| JP7048808B1 (en) | 2021-08-27 | 2022-04-05 | 上海晶科緑能企業管理有限公司 | Solar cells and photovoltaic modules |
-
2018
- 2018-12-29 CN CN201822269611.2U patent/CN209119121U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736147A (en) * | 2019-10-15 | 2021-04-30 | 浙江爱旭太阳能科技有限公司 | Solar cell and method for producing the same |
| JP7048808B1 (en) | 2021-08-27 | 2022-04-05 | 上海晶科緑能企業管理有限公司 | Solar cells and photovoltaic modules |
| JP7137031B1 (en) | 2021-08-27 | 2022-09-13 | 上海晶科緑能企業管理有限公司 | Solar cells and photovoltaic modules |
| JP2023033081A (en) * | 2021-08-27 | 2023-03-09 | 上海晶科緑能企業管理有限公司 | Photovoltaic cell and photovoltaic module |
| JP2023033050A (en) * | 2021-08-27 | 2023-03-09 | 上海晶科緑能企業管理有限公司 | Photovoltaic cell and photovoltaic module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: CSI Cells Co.,Ltd. Patentee after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI Cells Co.,Ltd. Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |