CN112038423A - Laminated tile battery piece structure with hollow grid lines - Google Patents
Laminated tile battery piece structure with hollow grid lines Download PDFInfo
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- CN112038423A CN112038423A CN202010933934.6A CN202010933934A CN112038423A CN 112038423 A CN112038423 A CN 112038423A CN 202010933934 A CN202010933934 A CN 202010933934A CN 112038423 A CN112038423 A CN 112038423A
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- printing
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- areas
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- 238000007639 printing Methods 0.000 claims abstract description 78
- 238000000034 method Methods 0.000 claims abstract description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052709 silver Inorganic materials 0.000 abstract description 14
- 239000004332 silver Substances 0.000 abstract description 14
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a laminated tile battery piece structure with hollowed-out grid lines, wherein five dividing lines are cut into six pieces according to equal division of the printed battery piece, two main grid lines are arranged on two sides of each dividing line on the front surface of the printed battery piece back to back, and two electrodes are arranged on two sides of each dividing line on the back surface of the printed battery piece back to back; the method is characterized in that: the main grid lines comprise non-hollowed-out areas and hollowed-out areas which are arranged in a staggered mode, the hollowed-out areas are arranged at two ends of each main grid line, the number of the hollowed-out areas on each main grid line is 10-20, and the electrode structure is the same as that of the main grid lines; the hollow-out area is provided with a printing area and a non-printing area, the printing area and the non-printing area are alternately distributed, and the area ratio of the printing area is more than or equal to 50%. The invention leads the adhesion between the ECA and the ECA to be more sufficient, and the tensile value is increased, thereby increasing the reliability of the assembly; the integrity and the stability are good, and the uniformity of silver paste distribution can be still ensured under the condition that the paste is collapsed after being printed.
Description
Technical Field
The invention relates to the technical field of solar cell structures, in particular to a laminated tile cell structure with hollow grid lines.
Background
With the wide application of solar energy, the solar photovoltaic panel industry is also developed vigorously. Traditionally, when a solar cell panel is produced, due to the characteristics of the structure of the cell, a plurality of cells and welding strips are required to be welded into a cell string, and then the cell string and other materials are assembled into a whole.
Because each cell is provided with the welding strip, the illumination area of the cell is greatly reduced, and the effective power generation area is reduced; moreover, on the battery string formed by serial connection, the distance is also formed between the battery pieces, so that the illumination area or the power generation area is also reduced; the above two causes cause the power generation efficiency of the module to be low.
The stack assembly uses another cell interconnection technology. And slicing the whole battery piece, and placing one side of the battery piece A below the other battery piece B after slicing so that the main grid line electrode on the front side of the battery piece A and the main grid line electrode on the back side of the battery piece B are superposed with each other. Materials such as ECA, solder strip or solder paste are adopted between the two electrodes to form physical connection and conductive connection; the design of the cell pattern suitable for the tile-stacking process usually adopts the design that the width of the front surface and the back surface is consistent with that of the main grid.
The existing shingled battery piece has the defects that: 1. at present, main grids on the front side and the back side of a mainstream laminated cell adopt a continuous design, and considering that ECA can completely fall into the main grids after a steel mesh or screen printing is carried out, the width of the main grids of the cell is larger than that after ECA printing, but only 10-20 printing points are needed for ECA printing, so that the excessive width of the main grids in a non-ECA printing area causes the waste of main grid slurry of the cell; 2. the battery piece and the pulling force of battery piece have direct influence to subassembly reliability in the shingled assembly manufacturing process, and the pulling force between battery piece and the battery piece mainly depends on the cohesiveness of conducting resin and battery piece main grid (electrode), because the bonding of ECA and silver thick liquid is different from conventional alloy welding, probably there is the gas pocket influence bonding effect on the contact surface with battery silver thick liquid.
Disclosure of Invention
The invention aims to overcome the defects and provide a laminated cell structure with hollow grid lines, so that the loss of silver paste of the laminated cell is reduced, the reliability of the assembly is improved by improving the tension between the cells, and the cost is reduced.
The purpose of the invention is realized as follows:
a shingled battery piece structure with hollowed-out grid lines is characterized in that a plurality of battery pieces are overlapped to form a battery string, the battery string is arranged in an array mode to form a component, the battery pieces are formed by breaking printed battery pieces off, and the printed battery pieces are formed by printing battery pieces before printing through ECA printing patterns; the battery piece before printing is provided with five dividing lines according to the equal division of six pieces, two sides of each dividing line on the front side of the battery piece before printing are back-to-back provided with two main grid lines, and two sides of each dividing line on the back side of the battery piece before printing are back-to-back provided with two electrodes; the method is characterized in that: the main grid lines comprise non-hollowed-out areas and hollowed-out areas which are arranged in a staggered mode, the hollowed-out areas are arranged at two ends of each main grid line, the number of the hollowed-out areas on each main grid line is 10-20, and the electrode structure is the same as that of the main grid lines; the hollow-out area is provided with a printing area and a non-printing area, the printing area and the non-printing area are alternately distributed, and the area ratio of the printing area is more than or equal to 50%.
Preferably, the lengths of the non-hollow-out areas and the hollow-out areas are 2-15mm, and the widths of the non-hollow-out areas and the hollow-out areas are 0.1-2 mm.
Preferably, the printing area and the non-printing area are in a strip shape and are distributed at intervals and have the same width.
Preferably, the printing areas are distributed in a circular array, and the rest of the printing areas are non-printing areas.
Preferably, the printing zones alternate to form triangular zones using four circular printing zones and three circular printing zones.
Preferably, the non-printing areas are mutually perpendicular grid lines, forming a grid-type printing area.
Preferably, the width of the non-hollow area is 0.2-0.5mm, the width of the hollow area is 0.3-1mm, the length of the hollow area is 2-5mm, and the width of the hollow area is greater than that of the non-hollow area.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the main grid ECA printing area is designed to be a hollow type through adjustment of a battery end printing process, and the area ratio of the printing part of the hollow area is more than 50%, so that the bonding between the main grid ECA printing area and the ECA is more sufficient, the pulling force value is increased, and the reliability of the assembly is improved; the integrity and the stability are good, and the uniformity of silver paste distribution can be still ensured under the condition that the paste is collapsed after being printed.
(2) According to the invention, different screen printing plate patterns of the battery piece are designed, the main grid patterns of the battery piece are optimized, and the cost is reduced by reducing the use amount of the main grid silver paste.
Drawings
Fig. 1 is a schematic diagram of the layout of grid lines on the front surface of a laminated cell sheet according to embodiment 1 of the present invention.
Fig. 2 is a schematic layout of grid lines on the back surface of a stack of tile battery pieces in embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of a gate line in embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of a cell sheet printing pattern according to example 1 of the present invention.
Fig. 5 is a schematic diagram of a cell sheet printing pattern in embodiment 2 of the present invention.
Fig. 6 is a schematic diagram of a cell sheet printing pattern according to embodiment 3 of the present invention.
Fig. 7 is a schematic diagram of the layout of grid lines on the front surface of a laminated cell sheet according to embodiment 4 of the present invention.
Fig. 8 is a schematic layout of the grid lines on the back surface of the shingled battery pieces according to embodiment 4 of the present invention.
Fig. 9 is a schematic structural view of a gate line in embodiment 4 of the present invention.
Wherein:
the device comprises a main grid line 1, an electrode 2, a non-hollow area 3, a hollow area 4, a printing area 5 and a non-printing area 6.
Detailed Description
Example 1:
referring to fig. 1-4, the invention relates to a laminated tile battery piece structure with hollowed-out grid lines, which comprises a battery string arranged in an array, wherein the battery string is formed by overlapping a plurality of battery pieces, the battery pieces are formed by breaking off printed battery pieces, and the printed battery pieces are formed by printing battery pieces before printing through an ECA printing pattern.
The battery piece before printing is provided with five dividing lines according to the equal division of six pieces, two main grid lines 1 are arranged on two sides of each dividing line on the front side of the battery piece before printing in a back-to-back mode, and the distance between the two main grid lines is 0.2-1 mm; two electrodes 2 are arranged back to back on two sides of each dividing line on the back surface of the battery piece before printing, and the distance between the two electrodes is 0.2-1 mm.
The main grid line 1 comprises non-hollow areas 3 and hollow areas 4 which are arranged in a staggered mode, the hollow areas 4 are arranged at two ends of the main grid line 1, the lengths of the non-hollow areas 3 and the hollow areas 4 are 2-15mm, and the widths of the non-hollow areas 3 and the hollow areas 4 are 0.1-2 mm; the number of the hollow-out areas 4 on a single main grid line is 10-20; the electrode 2 has the same structure as the bus bar 1.
The hollowed-out area 4 is provided with a printing area 5 and a non-printing area 6, in order to guarantee welding tension, the silver paste printing area 5 and the non-printing area 6 need to be alternately distributed, the area ratio of the printing area 5 is more than or equal to 50%, and the printing area 5 and the non-printing area 6 are in strip-shaped mutual interval distribution and are the same in width.
The adjacent battery pieces are overlapped up and down, the overlapping width is 0.1-3mm, and the overlapped part is provided with conductive adhesive which plays roles of bonding, interconnection and conduction.
The battery string that the array was arranged carries out circuit connection for each six strings of battery strings about through first busbar, and both sides edge sets up second busbar and third busbar respectively and welds, and the intermediate position of the six strings of battery strings in left side sets up the fourth busbar and connects, the fourth busbar is connected with the second busbar, and the intermediate position of the six strings of battery strings in right side sets up the fifth busbar and connects, the fifth busbar is connected with the third busbar, fourth busbar and fifth busbar are as the positive negative pole output end of subassembly, be equipped with the sixth busbar between fourth busbar and the fifth busbar, the sixth busbar is first to be connected with the busbar.
And two ends of the back surface of the assembly are provided with split junction boxes.
Example 2:
referring to fig. 5, the difference between the structure of the tiled cell with the hollowed-out gate lines and the embodiment 1 is that the printing regions 5 are distributed in a circular array, the rest of the printing regions are non-printing regions 6, the hollowed-out effect is realized by using the intervals between circles, and four circular printing regions 5 and three circular printing regions 5 are used to alternately form triangular regions to increase the stability of welding tension and save cell silver paste.
Example 3:
referring to fig. 6, the difference of the shingled battery sheet structure with the hollowed-out grid lines according to the present invention from embodiment 1 is that the non-printing areas 6 are mutually perpendicular grid lines to form the grid-type printing area 5, the area ratio of the grid pattern printing area 5 reaches 64.6%, the integrity and stability of the grid pattern are good, and the uniformity of the silver paste distribution can be ensured even when the paste is collapsed after printing.
Example 4:
referring to fig. 7 to 9, the difference of the shingled cell structure with the hollowed-out gate lines according to the present invention from embodiment 1 is that the width of the non-hollowed-out area 3 is 0.2 to 0.5mm, the width of the hollowed-out area 4 is 0.3 to 1mm, the length is 2 to 5mm, and the width of the hollowed-out area 4 is greater than the width of the non-hollowed-out area 3.
The silver paste loss comparison of the present invention with the prior art is shown in the following table:
| consumption of front main grid silver paste | Consumption of silver on the front side | Consumption of back main grid silver paste | Silver consumption of back fine grid | Lowering the book | |
| Prior Art | 95mg | 80mg | 90mg | 94mg | baseline |
| Example 1 | 76.8mg | 80mg | 72.8mg | 94mg | -9.8% |
| Example 2 | 79.2mg | 80mg | 75mg | 94mg | -8.5% |
| Example 3 | 82mg | 80mg | 78mg | 94mg | -7% |
| Example 4 | 42.5mg | 80.7mg | 45mg | 94.9mg | -27.4% |
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (7)
1. A shingled battery piece structure with hollowed-out grid lines is characterized in that five dividing lines are arranged on a battery piece before printing according to the equal division of six pieces, two main grid lines (1) are arranged on two sides of each dividing line on the front side of the battery piece before printing in a back-to-back manner, and two electrodes (2) are arranged on two sides of each dividing line on the back side of the battery piece before printing in a back-to-back manner; the method is characterized in that: the main grid line (1) comprises non-hollowed-out areas (3) and hollowed-out areas (4) which are arranged in a staggered mode, the hollowed-out areas (4) are arranged at two ends of the main grid line (1), the number of the hollowed-out areas (4) on a single main grid line (1) is 10-20, and the structure of the electrode (2) is the same as that of the main grid line; the hollowed-out area (4) is provided with a printing area (5) and a non-printing area (6), the printing area (5) and the non-printing area (6) are alternately distributed, and the area of the printing area (5) is more than or equal to 50%.
2. The structure of the laminated cell with the hollowed-out grid lines as claimed in claim 1, wherein: the lengths of the non-hollow-out areas (3) and the hollow-out areas (4) are 2-15mm, and the widths of the non-hollow-out areas and the hollow-out areas are 0.1-2 mm.
3. The structure of the laminated cell with the hollowed-out grid lines as claimed in claim 1, wherein: the printing area (5) and the non-printing area (6) are in strip shapes and are mutually distributed at intervals and have the same width.
4. The structure of the laminated cell with the hollowed-out grid lines as claimed in claim 1, wherein: the printing areas (5) are distributed in a circular array, and the rest areas are non-printing areas (6).
5. The structure of the laminated cell with the hollowed-out grid lines as claimed in claim 4, wherein: the printing areas (5) alternately form triangular areas using four circular printing areas (5) and three circular printing areas (5).
6. The structure of the laminated cell with the hollowed-out grid lines as claimed in claim 1, wherein: the non-printing area (6) is mutually vertical grid lines to form a grid type printing area (5).
7. The structure of the laminated cell with the hollowed-out grid lines as claimed in claim 1, wherein: the width of the non-hollow area (3) is 0.2-0.5mm, the width of the hollow area (4) is 0.3-1mm, the length of the hollow area (4) is 2-5mm, and the width of the hollow area (4) is larger than that of the non-hollow area (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933934.6A CN112038423A (en) | 2020-09-08 | 2020-09-08 | Laminated tile battery piece structure with hollow grid lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933934.6A CN112038423A (en) | 2020-09-08 | 2020-09-08 | Laminated tile battery piece structure with hollow grid lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112038423A true CN112038423A (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010933934.6A Pending CN112038423A (en) | 2020-09-08 | 2020-09-08 | Laminated tile battery piece structure with hollow grid lines |
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| Country | Link |
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| CN (1) | CN112038423A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695574A (en) * | 2022-04-27 | 2022-07-01 | 浙江爱康光电科技有限公司 | Heterojunction battery piece without main grid |
-
2020
- 2020-09-08 CN CN202010933934.6A patent/CN112038423A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695574A (en) * | 2022-04-27 | 2022-07-01 | 浙江爱康光电科技有限公司 | Heterojunction battery piece without main grid |
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Address after: 214421 no.1015, Qinfeng Road, Hongmiao Park, Huashi Industrial Park, Jiangyin City, Wuxi City, Jiangsu Province Applicant after: Zhejiang Aikang New Energy Technology Co.,Ltd. Applicant after: JIANGSU AKCOME ENERGY RESEARCH INSTITUTE Co.,Ltd. Applicant after: Zhejiang Aikang Photoelectric Technology Co.,Ltd. Address before: 214421 no.1015, Qinfeng Road, Hongmiao Park, Huashi Industrial Park, Jiangyin City, Wuxi City, Jiangsu Province Applicant before: JIANGYIN AKCOME SCIENCE AND TECHNOLOGY Co.,Ltd. Applicant before: JIANGSU AKCOME ENERGY RESEARCH INSTITUTE Co.,Ltd. Applicant before: Zhejiang Aikang Photoelectric Technology Co.,Ltd. |
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Address after: Room 901-20, Building 1, 1818-2 Wenyi West Road, Yuhang Street, Yuhang District, Hangzhou City, Zhejiang Province, 311100 Applicant after: Zhejiang Aikang New Energy Technology Co.,Ltd. Applicant after: JIANGSU AKCOME ENERGY RESEARCH INSTITUTE Co.,Ltd. Applicant after: Zhejiang Aikang Photoelectric Technology Co.,Ltd. Address before: 214421 no.1015, Qinfeng Road, Hongmiao Park, Huashi Industrial Park, Jiangyin City, Wuxi City, Jiangsu Province Applicant before: Zhejiang Aikang New Energy Technology Co.,Ltd. Applicant before: JIANGSU AKCOME ENERGY RESEARCH INSTITUTE Co.,Ltd. Applicant before: Zhejiang Aikang Photoelectric Technology Co.,Ltd. |