CN104966746A - Solar cell assembly - Google Patents
Solar cell assembly Download PDFInfo
- Publication number
- CN104966746A CN104966746A CN201510381209.1A CN201510381209A CN104966746A CN 104966746 A CN104966746 A CN 104966746A CN 201510381209 A CN201510381209 A CN 201510381209A CN 104966746 A CN104966746 A CN 104966746A
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- CN
- China
- Prior art keywords
- battery sheet
- solar battery
- solar
- welding
- solar cell
- 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
- 238000003466 welding Methods 0.000 claims abstract description 58
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- H01L31/04—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
-
- 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
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a solar cell assembly, which comprises at least one solar cell string, wherein the solar cell string is formed by electrically connecting a plurality of solar cells through a welding band; each solar cell is provided with at least two main grid lines, and the length L of the solar cells along the direction of the main grid lines is less than or equal to 10cm; the total width W of the welding band adopted on each solar cell occupies 0.1%-2% of the width D of the solar cell; and the ratio between the total width W of the welding band and the length L of the corresponding solar cell is in a range of D:8000 to D:3000. The solar cell assembly disclosed by the invention perfectly harmonizes contradiction between the shading loss of the welding band and the resistance loss, and realizes maximization of the output power.
Description
Technical field
The present invention relates to area of solar cell, be specifically related to a kind of solar module.
Background technology
Conventional fossil fuel approach exhaustion day by day, in all sustainable energies, solar energy is undoubtedly the most clean, the most general and most potential alternative energy source of one.Photovoltaic generation is one of generation technology of most sustainable development desired characteristics.At present, in all solar cells, silicon solar cell is one of solar cell obtaining business promotion on a large scale, this is because silicon materials have very abundant reserves in the earth's crust, the solar cell of other types compared by silicon solar cell simultaneously, has excellent electric property and mechanical performance.In the development of following photovoltaic technology, along with the further raising of silicon solar cell photoelectric properties, the further reduction of silicon materials price, silicon solar cell will occupy consequence at photovoltaic art.
In prior art, the solar module be made up of cell piece generally comprises the multiple solar cell strings encapsulated by encapsulating structure, and solar cell string is in series by multiple solar battery sheet.Solar battery sheet is provided with at least 2 main gate line, during adjacent 2 cell pieces series connection, is electrically connected by welding.The quantity of welding is identical with the quantity of main gate line.At present, conventional in industry welding is all elongated.In order to reduce the shading loss of welding as far as possible, the width of General Requirements welding is more narrow better.And in order to reduce the resistance loss of welding as far as possible, wish that again the cross-sectional area of welding is the bigger the better.This just defines conflict.Therefore, how coordinating above-mentioned contradiction, realize the maximization of power output, and can save the consumption of slurry and welding, is one of technical barrier of this area.
Summary of the invention
The object of this invention is to provide a kind of solar module.
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of solar module, comprises at least 1 solar cell string, and described solar cell string is formed by welding electrical connection by multiple solar battery sheet;
Described solar battery sheet is provided with at least 2 main gate line, and is less than or equal to 10 cm along the length L of the solar battery sheet on main gate line direction;
The overall width W of the welding that each solar battery sheet described adopts accounts for 0.1% ~ 2% of this solar battery sheet width D;
And the ratio of the length L of the overall width W solar battery sheet corresponding thereto of described welding is D:8000 ~ D:3000.
Above, described solar cell string is in series by welding by multiple solar battery sheet, and this belongs to prior art.
Solar module comprises multiple solar cell string, and these solar cell strings can adopt cascaded structure, also can adopt the mixed structure of series and parallel connections.
Described D:8000 ~ D:3000, D refer to the width of solar battery sheet, and unit is mm.
Feature of the present invention have employed the solar battery sheet that length L is less than or equal to 10 cm, this solar battery sheet can be the cell piece that normal full wafer is cut by slice process, also can be normal solar battery sheet remaining after full wafer solar battery sheet defective removes flaw part by slice process.
The ratio of the length L of the overall width W solar battery sheet corresponding thereto of described welding is D:8000 ~ D:3000; Here " solar battery sheet corresponding thereto " refers to the cell piece at welding place; That is:, on single solar battery sheet, the overall width of welding that it adopts and the length ratio of cell piece are D:8000 ~ D:3000.
Preferably, described solar battery sheet is 3 ~ 9 cm along the length on its main gate line direction.
In technique scheme, on described solar battery sheet, the quantity of main gate line is 2 ~ 20.
In technique scheme, described solar battery sheet is formed by the cutting of complete solar battery sheet.Existing conventional solar battery sheet is generally 156 × 156 mm, after cutting into slices, can obtain the cell piece that length is less than or equal to 10 cm, and its width is still 156 mm.
Preferably, described solar battery sheet by complete solar battery sheet according to 1/2 section ratio cut half solar battery sheet.For the conventional batteries sheet of 156 × 156 mm, according to the section ratio of 1/2, obtain the solar battery sheet of 156 × 78 mm.
Preferably, the quantity of the welding each solar battery sheet described adopted is identical with the quantity of its main gate line.
Preferably, the width of the welding described solar battery sheet adopted is all identical.
In technique scheme, on each solar battery sheet described, the overall width of main gate line accounts for 0.1% ~ 2% of this solar battery sheet width.Namely the width of main gate line becomes along with welding width, and when welding narrows, main gate line also narrows.
Principle of the present invention is: the resistance power loss=A*A*B* ρ * J of solar module welding
mp/ (m*V
mp* W
b), wherein A is the length of cell piece, and B is the sheet resistance of the half of two main grid spacing, ρ welding, and Jmp is maximum functional point current density, and m is a constant, Vmp be in maximum functional point one, place cell piece unit on voltage, W
bfor the half of welding width.Shading power loss=the W of solar module welding
b/ (n*B), n are a constant.Best welding width should be that the resistance power loss of welding is equal with shading power loss, therefore best W
b=A*B(n* J
mp/ (m*V
mp))
1/2.Therefore W
b/ B is proportional to A, and the length that the overall width W of the welding namely solar battery sheet adopted accounts for the ratio of this solar battery sheet width D and cell piece is proportional.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1. the present invention devises a kind of new solar module, by the solar battery sheet adopting length to be less than or equal to 10 cm, devise the welding of rational width simultaneously, and define the ratio of welding overall width and solar cell leaf length, the perfect coordination contradiction of welding shading loss and resistance loss, realizes the maximization of power output; Experiment proves: compared with existing full wafer solar battery sheet, under the prerequisite that silicon chip consumption is identical, shading loss of the present invention and resistance loss reduce all greatly, and the power output of assembly promotes greatly, achieve beyond thought technique effect;
2. invention also saves the consumption of slurry and welding, reduce cost, thus there is positive realistic meaning;
3. the present invention can well be applicable to existing technique, and be easy to preparation, cost is lower, is suitable for applying.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment one
A kind of solar module, comprise 1 solar cell string, each solar cell string is in series by welding by 120 solar battery sheets;
The size of the solar battery sheet in described solar cell string is all identical, by complete solar battery sheet (156 × 156 mm) according to 1/2 section ratio cut half solar battery sheet, i.e. 156 × 78 mm; Solar battery sheet is provided with 4 main gate line; Article 4, the width of main gate line is 0.5 mm; The overall width of main gate line accounts for 1.28% of this solar battery sheet width;
Each solar battery sheet described is provided with 4 weldings, and the width of 4 weldings is 0.6 mm; The overall width W of welding accounts for 1.54% of this solar battery sheet width;
The ratio of the length L of the overall width W solar battery sheet corresponding thereto of described welding is 1:32.5。
Embodiment two
A kind of solar module, comprise 6 solar cell strings, each solar cell string is in series by welding by 20 solar battery sheets, and every two string solar battery sheets form a parallel units, have 3 parallel units, three parallel units are series arrangement;
The size of the solar battery sheet in described solar cell string is all identical, by complete solar battery sheet (156 × 156 mm) according to 1/2 section ratio cut half solar battery sheet, i.e. 156 × 78 mm; Solar battery sheet is provided with 4 main gate line; Article 4, the width of main gate line is 0.5 mm; The overall width of main gate line accounts for 1.28% of this solar battery sheet width;
Each solar battery sheet described is provided with 4 weldings, and the width of 4 weldings is 0.6 mm; The overall width W of welding accounts for 1.54% of this solar battery sheet width;
The ratio of the length L of the overall width W solar battery sheet corresponding thereto of described welding is 1:32.5.
Comparative example one
A kind of solar module, comprise 1 solar cell string, each solar cell string is in series by welding by 60 solar battery sheets;
The size of the solar battery sheet in described solar cell string is all identical, adopts complete solar battery sheet (156 × 156 mm);
Solar battery sheet is provided with 4 main gate line; Article 4, the width of main gate line is 1.1 mm; The overall width of main gate line accounts for 2.82% of this solar battery sheet width;
Each solar battery sheet described is provided with 4 weldings, and the width of 4 weldings is 1.2 mm; The overall width W of welding accounts for 3.08% of this solar battery sheet width;
The ratio of the length L of the overall width W solar battery sheet corresponding thereto of described welding is 1:32.5.
Above-described embodiment and comparative example are done the test of shading loss, resistance loss and power output, and do electric performance test, contrast as follows:
| Welding width | Pmax | Voc | Isc | FF | |
| Embodiment one | 0.6mm | 267.9 | 75.72 | 4.56 | 77.60% |
| Embodiment two | 0.6mm | 267.3 | 37.86 | 9.1 | 77.59% |
| Comparative example one | 1.2mm | 260.1 | 37.77 | 8.97 | 76.76% |
As seen from the above table, compared with existing full wafer solar battery sheet (comparative example one), under the prerequisite that silicon chip consumption is identical, embodiment one and comparative example one are all full series arrangement, embodiment one monolithic battery sheet area is the half of comparative example one, but the electric current of embodiment one exceedes the half of comparative example one electric current, illustrate that the shading loss of embodiment one is less than comparative example one.Meanwhile, the fill factor, curve factor of embodiment one is obviously greater than the fill factor, curve factor of comparative example one, illustrates that the resistance loss of embodiment one is less than the resistance loss of comparative example one.
The electric current of embodiment two is greater than the electric current with comparative example one, illustrates that the shading loss of embodiment two is less than comparative example one.Meanwhile, the fill factor, curve factor of embodiment two is obviously greater than the fill factor, curve factor of comparative example one, illustrates that the resistance loss of embodiment two is less than the resistance loss of comparative example one.
As can be seen here, shading loss of the present invention and resistance loss reduce all greatly, and the power output of assembly promotes greatly, achieve beyond thought technique effect, meanwhile, owing to present invention employs thinner welding, the welding consumption of assembly significantly reduces, thus provides cost savings.Meanwhile, owing to present invention employs thinner welding, corresponding cell piece main grid width also narrows thereupon, thus causes the front printing slurry consumption reduction of cell piece and the reduction of backplate usage of sizing agent, thus also saves cost.The aluminium back surface field area of respective battery sheet strengthens simultaneously, contributes to the power stage improving assembly further.
Claims (8)
1. a solar module, comprises at least 1 solar cell string, and described solar cell string is formed by welding electrical connection by multiple solar battery sheet; It is characterized in that:
Described solar battery sheet is provided with at least 2 main gate line, and is less than or equal to 10 cm along the length L of the solar battery sheet on main gate line direction;
The overall width W of the welding that each solar battery sheet described adopts accounts for 0.1% ~ 2% of this solar battery sheet width D;
And the ratio of the length L of the overall width W solar battery sheet corresponding thereto of described welding is D:8000 ~ D:3000.
2. solar module according to claim 1, is characterized in that: described solar battery sheet is 3 ~ 9 cm along the length on its main gate line direction.
3. solar module according to claim 1, is characterized in that: on described solar battery sheet, the quantity of main gate line is 2 ~ 20.
4. solar module according to claim 1, is characterized in that: described solar battery sheet is formed by the cutting of complete solar battery sheet.
5. solar module according to claim 4, is characterized in that: described solar battery sheet by complete solar battery sheet according to 1/2 section ratio cut half solar battery sheet.
6. solar module according to claim 1, is characterized in that: the quantity of the welding that each solar battery sheet described adopts is identical with the quantity of its main gate line.
7. solar module according to claim 1, is characterized in that: the width of the welding that described solar battery sheet adopts is all identical.
8. solar module according to claim 1, is characterized in that: on each solar battery sheet described, the overall width of main gate line accounts for 0.1% ~ 2% of this solar battery sheet width.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510381209.1A CN104966746A (en) | 2015-07-02 | 2015-07-02 | Solar cell assembly |
| EP16816964.7A EP3355363B1 (en) | 2015-07-02 | 2016-03-28 | Solar cell module |
| PCT/CN2016/077563 WO2017000599A1 (en) | 2015-07-02 | 2016-03-28 | Solar cell module |
| US15/987,446 US20180269344A1 (en) | 2015-07-02 | 2018-05-23 | Solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510381209.1A CN104966746A (en) | 2015-07-02 | 2015-07-02 | Solar cell assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104966746A true CN104966746A (en) | 2015-10-07 |
Family
ID=54220760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510381209.1A Withdrawn CN104966746A (en) | 2015-07-02 | 2015-07-02 | Solar cell assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104966746A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017000599A1 (en) * | 2015-07-02 | 2017-01-05 | 苏州阿特斯阳光电力科技有限公司 | Solar cell module |
| CN106803521A (en) * | 2015-11-25 | 2017-06-06 | 中电电气(上海)太阳能科技有限公司 | A kind of low cost high powered solar cell module |
| CN107452824A (en) * | 2017-08-14 | 2017-12-08 | 江阴艾能赛瑞能源科技有限公司 | A kind of new type solar energy half cell piece and its preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884113A (en) * | 2007-12-11 | 2010-11-10 | 长青太阳能股份有限公司 | Photovoltaic panel and cell with fine fingers and method of manufacture of the same |
| CN104332519A (en) * | 2014-10-24 | 2015-02-04 | 无锡帝科电子材料科技有限公司 | Photovoltaic solder strip capable of reducing cost and improving power generation efficiency |
| CN104576781A (en) * | 2015-01-27 | 2015-04-29 | 苏州阿特斯阳光电力科技有限公司 | Solar cell |
-
2015
- 2015-07-02 CN CN201510381209.1A patent/CN104966746A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884113A (en) * | 2007-12-11 | 2010-11-10 | 长青太阳能股份有限公司 | Photovoltaic panel and cell with fine fingers and method of manufacture of the same |
| CN104332519A (en) * | 2014-10-24 | 2015-02-04 | 无锡帝科电子材料科技有限公司 | Photovoltaic solder strip capable of reducing cost and improving power generation efficiency |
| CN104576781A (en) * | 2015-01-27 | 2015-04-29 | 苏州阿特斯阳光电力科技有限公司 | Solar cell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017000599A1 (en) * | 2015-07-02 | 2017-01-05 | 苏州阿特斯阳光电力科技有限公司 | Solar cell module |
| CN106803521A (en) * | 2015-11-25 | 2017-06-06 | 中电电气(上海)太阳能科技有限公司 | A kind of low cost high powered solar cell module |
| CN107452824A (en) * | 2017-08-14 | 2017-12-08 | 江阴艾能赛瑞能源科技有限公司 | A kind of new type solar energy half cell piece and its preparation method and application |
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Application publication date: 20151007 |