CN115000196A - Solar cell grid line structure and solar cell - Google Patents
Solar cell grid line structure and solar cell Download PDFInfo
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- CN115000196A CN115000196A CN202210651108.1A CN202210651108A CN115000196A CN 115000196 A CN115000196 A CN 115000196A CN 202210651108 A CN202210651108 A CN 202210651108A CN 115000196 A CN115000196 A CN 115000196A
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- solar cell
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- line structure
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- 229910052709 silver Inorganic materials 0.000 abstract description 16
- 239000004332 silver Substances 0.000 abstract description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 14
- 239000000463 material Substances 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 238000005323 electroforming Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000000720 eyelash Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (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)
- Photovoltaic Devices (AREA)
Abstract
The invention belongs to the technical field of solar energy, and discloses a solar cell grid line structure and a solar cell. The solar cell comprises the solar cell grid line structure. Has the advantages that: for the grid line structure of the solar cell, the auxiliary grid lines are lapped on the main grid lines, and the auxiliary grid lines are provided with gaps between two adjacent main grid lines, so that the cell efficiency is not influenced, and the consumption of silver is reduced. For the solar cell, the grid line structure of the solar cell is provided with the gap between two adjacent main grid lines, so that the cell efficiency is not influenced, and the consumption of silver is reduced.
Description
Technical Field
The invention relates to the technical field of solar energy, in particular to a solar cell grid line structure and a solar cell.
Background
The production of the conductive grid line of the solar cell is realized by screen printing at present, silver paste is extruded by a scraper, penetrates through a screen printing plate, reaches the suede of the cell, and is collected, and the conductive silver line is collected, because the silver paste is a noble material containing 99% of silver, the silver paste is the second largest consumable material of the solar cell, and due to the material structure of the screen printing, the bottleneck exists in the high printing fineness of the grid line printing, so that the consumption of the silver paste is always high at present, particularly, the material mode embodied on a heterojunction product is obvious, and the situation that the conventional screen printing is conducted is broken is compelled to be very eyelash.
In recent years, electroforming screens have gradually begun to be used in the photovoltaic industry. Electroforming half tone has 100% percent open porosity, when making battery grid line structure, often needs to support on the half tone, and the steel wire on the half tone leads to the grid line height uneven, and printing line width is broad (more than 40 um), and silver thick liquid consumes highly.
Disclosure of Invention
The invention aims to provide a solar cell grid line structure to solve the problems of wide width of a printing line and high consumption of silver paste.
The invention also aims to provide a solar cell, which aims to solve the problem of high silver paste consumption, and adopts the following technical scheme:
a solar cell grid line structure comprises a plurality of main grid lines extending along an X-axis direction and auxiliary grid lines lapped with the main grid lines and extending along a Y-axis direction, wherein an included angle is formed between the X-axis direction and the Y-axis direction, and a gap is formed between every two adjacent main grid lines of the auxiliary grid lines.
As a preferable scheme of the solar cell grid line structure, the notch is arranged on each auxiliary grid line.
As a preferred embodiment of the grid line structure of the solar cell, an included angle of 90 ° is formed between the X-axis direction and the Y-axis direction.
As a preferred scheme of the grid line structure of the solar cell, the notches on the auxiliary grid lines of each row are arranged along the Y-axis direction.
As the preferable scheme of the grid line structure of the solar cell, the notches on the two adjacent rows of the auxiliary grid lines are arranged along the Y-axis direction in a staggered mode.
As a preferable scheme of the grid line structure of the solar cell, the notch is located in the middle between two adjacent main grid lines.
As a preferable scheme of the solar cell grid line structure, the length of the notch is set to be 300-800 μm.
As a preferable scheme of the grid line structure of the solar cell, gaps on two adjacent auxiliary grid lines are spaced by 0.3mm-5mm along the Y-axis direction.
As a preferred scheme of the grid line structure of the solar cell, the main grid line is thicker than the auxiliary grid line.
A solar cell comprises a front electrode, wherein the front electrode is provided with the solar cell grid line structure.
As a preferable aspect of the above solar cell, the solar cell further includes an antireflective film, a PN junction, and a back surface electrode.
The invention has the beneficial effects that:
for the solar cell grid line structure, the auxiliary grid lines are lapped on the main grid lines and gaps are formed between every two adjacent main grid lines, so that the cell efficiency is not influenced, and the consumption of silver is reduced.
For the solar cell, the grid line structure of the solar cell is provided with the gap between two adjacent main grid lines, so that the cell efficiency is not influenced, and the consumption of silver is reduced.
Drawings
Fig. 1 is a partial schematic view of a solar cell grid line structure provided in an embodiment of the present application.
In the figure:
1-a main gate line; 2-secondary grid line; 20-notch.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the invention provides a solar cell grid line structure, which includes a main grid line 1 and an auxiliary grid line 2, wherein an included angle is formed between the main grid line 1 and the auxiliary grid line 2, and the main grid line 1 and the auxiliary grid line 2 are both made of silver paste, so that current on the surface of a solar cell can be collected and converged. The main grid lines 1 extend along the X-axis direction and are arranged along the Y-axis direction, and the sub-grid lines 2 extend along the Y-axis direction and extend along the X-axis direction. The secondary grid lines 2 are used for collecting circuits and are transmitted to the main grid lines 1, and the main grid lines 1 enable the secondary grid lines 2 to collect current in the photovoltaic module and then penetrate through a photovoltaic welding strip (not shown).
In this embodiment, the main gate lines 1 are arranged to be a continuous extending structure, and the sub-gate lines 2 are provided with gaps 20 between two adjacent rows of the main gate lines 1. The solar cell grid line structure can reduce the consumption of silver on the basis of not influencing the efficiency of a cell. And, the main gate line 1 is thicker than the sub gate line 2.
In a preferred embodiment of this embodiment, each of the sub-grid lines 2 is provided with a notch 20. By so doing, the consumption of silver can be reduced for each finger line 2.
In the preferred embodiment of this embodiment, the notches 20 are arranged on each of the sub-gate lines 2 along the Y-axis direction, and the notches 20 are arranged along the Y-axis direction, so that the notches 20 can be conveniently prepared on the sub-gate lines 2.
In another preferred embodiment of this embodiment, the notches 20 on two adjacent rows of sub-grid lines 2 are arranged along the Y-axis direction in a staggered manner. The stress at the notch 20 is prevented from being concentrated on a straight line, so that the stress of the structure is more uniform.
In the preferred scheme of this embodiment, the notch 20 is located in the middle between two adjacent main grid lines 1, so as to improve the uniformity of the grid line structure of the solar cell and provide the photoelectric conversion efficiency of the solar cell. Of course, the notch 20 is not limited thereto, and may be biased toward the bus bar 1 on either side.
In this embodiment, the notches 20 are provided in a range of 300 μm to 800 μm in length extending in the Y-axis direction. Preferably, the length of the notch 20 is 600 μm.
Further, the gaps 20 on two adjacent secondary grid lines 2 are spaced by 0.3mm-5mm along the Y-axis direction. Preferably, the gaps 20 on two adjacent finger lines 2 are spaced by 1mm along the Y-axis direction.
The invention also provides a solar cell, which comprises a front electrode, an antireflection film, a PN junction and a back electrode, wherein the front electrode leads out carriers generated by the PN junction for an external circuit, and the front electrode comprises the solar cell grid line structure.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a solar cell grid line structure, its characterized in that includes a plurality of main grid line (1) that extend along X axle direction and with sub-grid line (2) that extend along Y axle direction of main grid line (1) overlap joint, X axle direction and Y axle direction are the contained angle, sub-grid line (2) are equipped with breach (20) between two adjacent main grid line (1).
2. The solar cell grid line structure according to claim 1, wherein each of the minor grid lines (2) is provided with the notch (20).
3. The solar cell grid line structure of claim 2, wherein the X-axis direction and the Y-axis direction are at a 90 ° angle.
4. The solar cell grid line structure according to claim 3, wherein the notches (20) on each row of the secondary grid lines (2) are arranged along the Y-axis direction.
5. The solar cell grid line structure according to claim 3, wherein the notches (20) on two adjacent rows of the secondary grid lines (2) are arranged in a staggered manner along the Y-axis direction.
6. The solar cell grid line structure according to claim 4 or 5, wherein the notch (20) is located in the middle between two adjacent main grid lines (1).
7. The solar cell grid line structure according to claim 6, wherein the gap (20) is provided with a length of 300 μm to 800 μm.
8. The solar cell grid line structure according to claim 6, wherein the gaps (20) on two adjacent secondary grid lines (2) are spaced by 0.3mm to 5mm along the Y-axis direction.
9. The solar cell grid line structure according to claim 1, wherein the main grid lines (1) are thicker than the secondary grid lines (2).
10. A solar cell comprising a front electrode provided with a solar cell grid line structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210651108.1A CN115000196A (en) | 2022-06-09 | 2022-06-09 | Solar cell grid line structure and solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210651108.1A CN115000196A (en) | 2022-06-09 | 2022-06-09 | Solar cell grid line structure and solar cell |
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| Publication Number | Publication Date |
|---|---|
| CN115000196A true CN115000196A (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210651108.1A Pending CN115000196A (en) | 2022-06-09 | 2022-06-09 | Solar cell grid line structure and solar cell |
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| Country | Link |
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| CN (1) | CN115000196A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4572947A (en) * | 1984-05-29 | 1986-02-25 | Westinghouse Electric Corp. | Triggering method for light triggered thyristors |
| CN204332976U (en) * | 2015-01-27 | 2015-05-13 | 苏州阿特斯阳光电力科技有限公司 | A kind of electrode structure at right side of solar cell |
| CN105870215A (en) * | 2016-04-28 | 2016-08-17 | 乐叶光伏科技有限公司 | Rear surface passivation contact battery electrode structure and preparation method thereof |
| CN110379869A (en) * | 2019-07-29 | 2019-10-25 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | A kind of more main grid solar batteries and battery front side electrode structure |
| CN112420853A (en) * | 2019-08-21 | 2021-02-26 | 苏州阿特斯阳光电力科技有限公司 | Multi-main-grid solar cell and solar module |
| CN212967720U (en) * | 2020-09-08 | 2021-04-13 | 东方日升（常州）新能源有限公司 | Solar cell metal electrode structure and battery pack |
| CN215220734U (en) * | 2021-02-08 | 2021-12-17 | 通威太阳能(金堂)有限公司 | PERC double-sided battery and back electrode thereof |
-
2022
- 2022-06-09 CN CN202210651108.1A patent/CN115000196A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4572947A (en) * | 1984-05-29 | 1986-02-25 | Westinghouse Electric Corp. | Triggering method for light triggered thyristors |
| CN204332976U (en) * | 2015-01-27 | 2015-05-13 | 苏州阿特斯阳光电力科技有限公司 | A kind of electrode structure at right side of solar cell |
| CN105870215A (en) * | 2016-04-28 | 2016-08-17 | 乐叶光伏科技有限公司 | Rear surface passivation contact battery electrode structure and preparation method thereof |
| CN110379869A (en) * | 2019-07-29 | 2019-10-25 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | A kind of more main grid solar batteries and battery front side electrode structure |
| CN112420853A (en) * | 2019-08-21 | 2021-02-26 | 苏州阿特斯阳光电力科技有限公司 | Multi-main-grid solar cell and solar module |
| CN212967720U (en) * | 2020-09-08 | 2021-04-13 | 东方日升（常州）新能源有限公司 | Solar cell metal electrode structure and battery pack |
| CN215220734U (en) * | 2021-02-08 | 2021-12-17 | 通威太阳能(金堂)有限公司 | PERC double-sided battery and back electrode thereof |
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Application publication date: 20220902 |