CN111261730A - Front electrode of N-type efficient TOPCon battery - Google Patents
Front electrode of N-type efficient TOPCon battery Download PDFInfo
- Publication number
- CN111261730A CN111261730A CN202010071270.7A CN202010071270A CN111261730A CN 111261730 A CN111261730 A CN 111261730A CN 202010071270 A CN202010071270 A CN 202010071270A CN 111261730 A CN111261730 A CN 111261730A
- Authority
- CN
- China
- Prior art keywords
- grid line
- main grid
- front electrode
- type high
- thin
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000007639 printing Methods 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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 invention discloses a front electrode of an N-type efficient TOPCon battery, which comprises a plurality of thin grid lines and a plurality of main grid lines, wherein at least one of the main grid lines consists of at least two main grid line sections arranged at intervals, and two tail ends of each main grid line section are forked to form two branch lines; the number of the thin grid lines is 95-105. The invention can be matched with the prior high-efficiency N-type TOPCon process to improve the efficiency of the battery; the consumption of the front metal slurry in production is reduced, and the production cost is reduced; meanwhile, the new process of the downstream component end can be matched, and the production yield and the power of the component are improved.
Description
Technical Field
The invention relates to an electrode design of a solar cell, in particular to a front electrode of an N-type high-efficiency TOPCon cell, and belongs to the technical field of solar cells.
Background
In the photovoltaic industry, the formation of electrodes is mainly realized by screen printing, and the basic principle that partial meshes of a screen pattern are full of slurry and partial meshes are not full of slurry is utilized for printing. During printing, slurry is poured into one end of the screen, a scraper is used for applying certain pressure on the slurry part of the screen, and the screen moves towards the other end of the screen, and the slurry is extruded onto the substrate from the meshes of the pattern part by the scraper in the moving process. The scraper blade is in line contact with the screen printing plate and the printing stock all the time in the printing process, the contact line moves along with the movement of the scraper blade, and other parts of the screen are in a separation state from the printing stock, so that the printing size precision is ensured and the smearing of the printing stock is avoided. When the scraper blade is lifted after scraping the whole printing area, the silk screen is also separated from the substrate, the slurry is slightly scraped back to the initial position by the ink returning blade, and the workbench returns to the loading position, so that the printing stroke is complete.
The printing screen plate occupies a very important ring in the screen printing process, wherein the pattern design of the screen plate is also a key in the key, and the pattern of the screen plate can be correspondingly adjusted and designed according to different requirements of products; by designing and adjusting the shape of the graph, the aims of reducing printing unit consumption, reducing the total consumption of noble metal production and reducing cost can be achieved; in addition, the conversion efficiency of the battery piece can be improved to a certain degree according to the design of the figure shape of the matched battery process; finally, the specially designed pattern can be matched with the process of a downstream assembly end, so that the production yield and the power of the solar assembly are improved. Therefore, the graphic design of the printing screen is critical to the performance of the battery.
Disclosure of Invention
In order to solve the above problems, the present invention provides a front electrode of an N-type high efficiency TOPCon cell, which improves the performance of a solar cell and reduces the production cost by designing the front electrode of the N-type high efficiency TOPCon cell.
Therefore, the invention adopts the following technical scheme:
the front electrode of the N-type high-efficiency TOPCon battery comprises a plurality of thin grid lines and a plurality of main grid lines, wherein at least one of the main grid lines consists of at least two main grid line sections arranged at intervals, and two tail ends of each main grid line section are forked to form two branch lines; the number of the thin grid lines is 95-105. The number of the thin grid lines is 95-105, so that the Voc and Isc of the electrical performance of the battery can be improved, and the fill factor FF of the battery can be ensured to reach an ideal value, thereby improving the overall conversion efficiency of the battery.
Preferably, the main grid line is composed of two equal main grid line segments, and the midpoint of the interval between the two main grid line segments is located on the middle line of the battery piece. Therefore, a central line is formed in the middle of the electrode pattern of the battery and matched with a battery piece half-cutting process, the central line can be combined with the improvement of the assembly end process, the welding reject ratio of the assembly is reduced, and the integral generating power of the assembly is improved.
Preferably, the width of the main grid line is 0.07 μm, and the width of the branch line is 0.05 μm. The width can ensure that the pulling and supporting force of the printing slurry and the reliability of the component slurry are qualified, and simultaneously, the slurry consumption of a single printed battery piece can be reduced, the cost is reduced, and the conversion efficiency of the battery is improved.
Preferably, a plurality of PAD PADs are arranged on the main grid line, the PAD PADs are different in size, and the distance between every two adjacent PAD PADs is different. The welding technology of the assembly end is improved, poor welding can be reduced, and the production yield of assembly products is improved.
Preferably, the anti-breaking grid design is arranged at the intersection of the main grid line and the thin grid line. And the loss of the cell efficiency caused by poor printing grid breakage in the actual production process is reduced.
Preferably, the breakage-proof grid is designed to be a thin grid line, and the intersection of the thin grid line and the main grid line gradually becomes thinner from the intersection to the far end to form an isosceles trapezoid structure. And the loss of the cell efficiency caused by poor printing grid breakage in the actual production process is reduced.
Preferably, the thin gate line at the connection of the thin gate line and the PAD does not penetrate through the PAD. The fine grid does not penetrate through the PAD point, so that the influence of the fine grid slurry on the pulling and supporting force of the main grid PAD point can be effectively reduced, and the welding effect of the assembly is optimized.
Preferably, the thin grid line is provided with an annular mark point, and the main grid line is provided with a corresponding solid pattern mark point.
Preferably, the thin grid line is provided with a circular mark point, the main grid line is provided with a corresponding solid circular mark point, the diameter of the circular ring is 0.8um, and the diameter of the circular ring is 0.8 um.
On the premise that the size of the mark point can ensure that the component end can be identified, the shading area of the front side of the battery can be reduced by reducing the area as small as possible, the short-circuit current Isc of the battery is improved, the unit consumption of the front main grid slurry is reduced, and the production cost is low. Mark point positions are determined through improvement of assembly processes, assembly welding is further optimized, and the reject ratio is reduced.
The invention is combined with the improvement of the assembly end process, can reduce poor welding of the assembly and improve the integral power generation power of the assembly, and preferably adopts discontinuous arrangement at the middle part, and the main grid line segment is preferably two segments which are symmetrically arranged.
In summary, compared with the prior art, the beneficial effects of the invention are as follows:
1. the purpose of improving the efficiency of the battery can be realized by matching with the existing high-efficiency N-type TOPCon process;
2. the consumption of the front metal slurry in production can be reduced, and the aim of reducing the production cost is fulfilled;
3. the method can be matched with a new process of a downstream component end to achieve the purpose of improving the production yield of the component and the power of the component.
Drawings
Fig. 1 is a schematic structural view of a main gate line according to the present invention;
FIG. 2 is a schematic diagram of a main grid mark point and a main grid PAD point in the present invention;
fig. 3 is a schematic view of a tail end structure of a main gate line according to the present invention;
FIG. 4 is a schematic diagram of the design of the main gate and the thin gate anti-breaking gate and the design of the connection between the thin gate and the PAD point in the present invention.
In the figure, 1 is a main grid line, 11 is a main grid line segment, 12 is a branch line, 2 is a thin grid line, 3 is a PAD welding point, 4 is an isosceles trapezoid structure, 5 is an annular mark point, and 6 is a solid graph mark point.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the front electrode of the N-type high-efficiency TOPCon battery of the present invention includes a plurality of thin grid lines 2 and a plurality of main grid lines 1, at least one of the main grid lines 1 is composed of at least two main grid line segments 11 arranged at intervals, and two ends of each main grid line segment 11 are all split to form two branch lines 12; the number of the thin grid lines 2 is 95-105.
In different embodiments, a different number of main gate line segments 11 may be designed. In this embodiment, in order to match with the half-cutting technology of the battery piece, the main grid line 1 is composed of two equal main grid line segments 11, and the midpoint of the interval between the two main grid line segments is located on the middle line of the battery piece. Thus, a center line is formed at the middle portion of the electrode pattern of the battery, which facilitates the half-cutting operation of the battery piece. Meanwhile, the welding reject ratio of the assembly is reduced, and the integral power generation power of the assembly is improved.
As shown in fig. 3, the width D1 of the main gate line 1 is 0.07 μm, and the width D2 of the branch line 12 is 0.05 μm. The width can ensure that the pulling and supporting force of the printing slurry and the reliability of the component slurry are qualified, and simultaneously, the slurry consumption of a single printed battery piece can be reduced, the cost is reduced, and the conversion efficiency of the battery is improved.
As shown in fig. 1 and 2, a plurality of PAD PADs 3 are disposed on a main gate line 1, and the PAD PADs have different sizes.
As shown in fig. 4, there is a break-proof gate design at the intersection of the main gate line 1 and the thin gate line 2. Specifically, the anti-breaking grid is designed to be tapered from the intersection to the far end at the intersection of the thin grid line 2 and the main grid line 1 on the thin grid line 2, so as to form an isosceles trapezoid structure 4. The thin grid line at the connection position of the thin grid line 2 and the PAD welding point 3 does not penetrate through the PAD welding point. The fine grid does not penetrate through the PAD point, so that the influence of the fine grid slurry on the pulling and supporting force of the main grid PAD point can be effectively reduced, and the welding effect of the assembly is optimized.
As shown in fig. 2 and 4, the thin gate line 2 has an annular mark point 5, and the main gate line has a corresponding solid pattern mark point 6. Preferably, the thin grid line is provided with a circular mark point, the main grid line is provided with a corresponding solid circular mark point, the diameter of the circular ring is 0.8um, and the diameter of the circular ring is 0.8 um.
The results of testing TOPCon cells using the front electrode of the N-type high efficiency TOPCon cell of the present invention are shown in tables 1 and 2 in comparison to conventional cells.
Table 1: print paste specific consumption comparison
Table 2: cell efficiency improvement contrast
Claims (9)
1. The front electrode of the N-type high-efficiency TOPCon battery comprises a plurality of thin grid lines and a plurality of main grid lines, wherein at least one of the main grid lines consists of at least two main grid line sections arranged at intervals, and two tail ends of each main grid line section are forked to form two branch lines; the number of the thin grid lines is 95-105.
2. The front electrode of an N-type high efficiency TOPCon cell of claim 1, wherein: the main grid line is composed of two equal main grid line segments, and the middle point of the interval between the two main grid line segments is positioned on the middle line of the battery piece.
3. The front electrode of an N-type high efficiency TOPCon cell of claim 1, wherein: the width of the main grid line is 0.07 mu m, and the width of the branch line is 0.05 mu m.
4. The front electrode of an N-type high efficiency TOPCon cell of claim 1, wherein: and a plurality of PAD welding spots are arranged on the main grid line, and the sizes of the PAD welding spots are different.
5. The front electrode of an N-type high efficiency TOPCon cell of claim 1, wherein: and the intersection of the main grid line and the thin grid line is provided with a breaking-proof grid design.
6. The positive electrode of an N-type high efficiency TOPCon cell of claim 5, wherein: the anti-breaking grid is designed to be a thin grid line, and the intersection of the thin grid line and the main grid line gradually becomes thinner from the intersection to the far end to form an isosceles trapezoid structure.
7. The front electrode of an N-type high efficiency TOPCon cell of claim 1, wherein: the thin grid line at the connection position of the thin grid line and the PAD welding point does not penetrate through the PAD welding point.
8. The front electrode of an N-type high efficiency TOPCon cell of claim 1, wherein: the thin grid line is provided with an annular mark point, and the main grid line is provided with a corresponding solid graph mark point.
9. The front electrode of an N-type high efficiency TOPCon cell of claim 8, wherein: there is ring shape mark point on the thin grid line, has corresponding solid circular mark point on the main grid line, and the diameter of ring is 0.8um, and circular shape diameter is 0.8 um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010071270.7A CN111261730A (en) | 2020-01-21 | 2020-01-21 | Front electrode of N-type efficient TOPCon battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010071270.7A CN111261730A (en) | 2020-01-21 | 2020-01-21 | Front electrode of N-type efficient TOPCon battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111261730A true CN111261730A (en) | 2020-06-09 |
Family
ID=70949090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010071270.7A Pending CN111261730A (en) | 2020-01-21 | 2020-01-21 | Front electrode of N-type efficient TOPCon battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111261730A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172485A (en) * | 2022-07-06 | 2022-10-11 | 浙江晶科能源有限公司 | Solar cell and photovoltaic module |
-
2020
- 2020-01-21 CN CN202010071270.7A patent/CN111261730A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172485A (en) * | 2022-07-06 | 2022-10-11 | 浙江晶科能源有限公司 | Solar cell and photovoltaic module |
| CN115172485B (en) * | 2022-07-06 | 2024-02-06 | 浙江晶科能源有限公司 | Solar cell and photovoltaic module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202142542U (en) | X type positive electrode structure used for solar battery | |
| CN111261730A (en) | Front electrode of N-type efficient TOPCon battery | |
| CN105789345A (en) | Front side electrode structure of solar cell and manufacturing method thereof | |
| CN202934909U (en) | Sectional type back-electrode screen printing plate | |
| CN212257410U (en) | Front electrode of N-type efficient TOPCon battery | |
| CN212303685U (en) | Back electrode pattern structure of crystalline silicon solar cell | |
| CN210245514U (en) | N-type efficient TOPCon battery | |
| CN203491270U (en) | Back electrode structure of crystalline silicon solar cell | |
| CN202796974U (en) | Positive electrode of photovoltaic solar cell | |
| CN202839626U (en) | Grid lines of solar cell slice | |
| CN111916509A (en) | Back electrode pattern structure of crystalline silicon solar cell | |
| CN110444614A (en) | A kind of efficient TOPCon battery of N-type | |
| CN202428776U (en) | Screen board for increasing height of electrode grid lines of solar battery | |
| CN204991723U (en) | Solar cell electrode | |
| CN215600378U (en) | Back laser pattern of PERC double-sided battery | |
| CN110289322A (en) | A kind of IBC solar battery pair grid line printing screen plate structure three times | |
| CN203085565U (en) | Novel solar battery positive electrode | |
| CN103192619B (en) | A kind of printing process of solar battery sheet | |
| CN202616241U (en) | Positive electrode structure of crystalline silicon solar battery | |
| CN204196425U (en) | For the half tone of printing solar cell front electrode | |
| CN202695462U (en) | Sectional-type positive-electrode highly-efficient solar cell sheet | |
| CN202678327U (en) | Positive grid line electrode structure | |
| CN113284956A (en) | Improved crystalline silicon solar cell printing process | |
| CN201592549U (en) | Solar battery screen printing device | |
| CN205970344U (en) | Print two net half tone equipment of no main grid battery piece front electrode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |