CN106449834A - Back surface gate line structure of double-sided PERC solar cell piece - Google Patents
Back surface gate line structure of double-sided PERC solar cell piece Download PDFInfo
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- CN106449834A CN106449834A CN201610876714.8A CN201610876714A CN106449834A CN 106449834 A CN106449834 A CN 106449834A CN 201610876714 A CN201610876714 A CN 201610876714A CN 106449834 A CN106449834 A CN 106449834A
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- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 title claims abstract description 49
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 title claims abstract description 49
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 title claims abstract description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 241000409201 Luina Species 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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
- H01L31/04—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
- H01L31/0516—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 specially adapted for interconnection of back-contact 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
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- 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 back surface gate line structure of a double-sided PERC solar cell piece. The back surface gate line structure comprises multiple columns of back electrodes and gate line parts, wherein each back electrode comprises multiple sub electrode sections; the symmetrical center lines of adjacent two sub electrode sections are set to be A lines; main gate parts are arranged between the end parts of the sub electrode sections and the adjacent A lines; the symmetrical center lines of the adjacent two columns of back electrodes are set to be B lines; the cross points of the A lines and the B lines are set to be C points; auxiliary parts are arranged between the end parts of the sub electrode sections and the adjacent C points; by virtue of the auxiliary parts, the points, far from the sub electrode sections, can be subjected to current collection through the auxiliary parts, and the collected current can be directly transmitted to the back electrodes, so that the problem that the main gate parts are used as the dielectric and the current is transmitted to the main gate parts firstly and then transmitted to the back electrodes is avoided; by adoption of the back surface gate line structure of the double-sided PERC solar cell piece, the output current of the solar cell module is improved; and the output power of the solar cell module is improved.
Description
Technical field
The present invention relates to technical field of solar batteries, particularly relate to a kind of two-sided PERC solar cell back face grid line
Structure.
Background technology
Conventional fossil fuel is day by day depleted, and in all of sustainable energy, it is the most clear that solar energy is undoubtedly one
One of alternative energy source clean, the most universal and most potential.In all of solar cell, silicon solar cell is most widely used
One of general solar cell, this is owing to silicon materials have the reserves extremely enriching, silicon solar cell simultaneously in the earth's crust
Compare other kinds of solar cell, have excellent electric property and mechanical performance.
PERC battery (Passivated emitter rear contact solar cells), i.e. passivation emitter are carried on the back
Face contact solar cell.In prior art, two-sided PERC solar cell back face grid line structure includes back electrode (silver grid
Line) and local back electric field (alum gate line).During solar module work, the electric current producing in silicon materials is by after the collection of alum gate line
Converge to, on silver back electrode, flow into next solar battery sheet via welding afterwards.As shown in Figure 4, in existing technology
Back electrode quantity is the main grid quantity of cell piece, the strip being shaped as strip or segmentation of back electrode, being shaped as of aluminum back electric field
Strip.Existing strip back electrode, the consumption of its silver slurry is big, relatively costly, when using the strip back electrode of segmentation, due to welding
Good contacting cannot be formed with aluminium, after welding, relatively difficult away from the electric current collection at silver back electrode, cause assembly EL to send out
Black, string resistance simultaneously increases.
Content of the invention
It is an object of the invention to provide a kind of two-sided PERC solar cell back face grid line structure, which increase the sun
The output electric current of energy battery component, improves the power output of solar module.
For reaching this purpose, the present invention is by the following technical solutions：
A kind of two-sided PERC solar cell back face grid line structure, including some row back electrodes and grid line portion, back of the body electricity
Pole includes several edge interconnection direction spaced sub-electrode sections, in same row back electrode, two adjacent sub-electrode sections
Symmetrical center line is set to A line, and A line is perpendicular with back electrode, is provided with main grid between the end of sub-electrode section and adjacent A line
Portion, two adjacent sub-electrode sections are by two main grid portion electrical connections between the two, in the symmetry of two adjacent row back electrodes
Heart line is set to B line, and B line is paralleled with back electrode, and A line is set to C point, the end of sub-electrode section and adjacent C point with the intersection point of B line
Between be provided with assisted parts.The setting of assisted parts so that electric current can be carried out by assisted parts away from the point of sub-electrode section and collect,
And the electric current after collecting can be transmitted directly on back electrode, it is to avoid it is transferred on back electrode as intermediary by main grid portion again
Problem.
Interconnection direction refers to the direction of battery electrical connection in battery strings.
Preferably, some row back electrodes are parallel to each other.It is further preferred that back electrode and two-sided PERC solar battery sheet
One of them limit parallel.
Preferably, the identical length etc. of some row back electrodes.
Wherein, from the end of sub-electrode section to C, the direction of point is gradually reduced the width of assisted parts.
Wherein, the center line in main grid portion and the center line of back electrode are parallel to each other.
Preferably, main grid portion is provided with the area of coverage overlapping mutually with sub-electrode section, and the area of coverage along the height in interconnection direction is
0.05～5mm.It is further preferred that the height in area of coverage edge interconnection direction is 0.1～2mm.
Wherein, main grid portion is wide linear structure.
Wherein, the width in main grid portion is gradually reduced from the end of sub-electrode section to the direction of A line.Main grid portion is away from sub-electrode
The current density of one end of section is less, and the current density of one end near sub-electrode section, main grid portion is relatively big, the width in main grid portion from
Direction from from the end of sub-electrode section to A line is gradually reduced, i.e. the width in main grid portion and current density matches, and solves electric current
The problem of transmission, it is to avoid the phenomenon of EL blackout.
Wherein, the width of sub-electrode section is less than or equal to the width in main grid portion.
Wherein, being provided with secondary grid portion between two main grid portions at sub-electrode section two ends, secondary grid portion is positioned at outside sub-electrode section
Side.
Wherein, the width of sub-electrode section is more than the width in main grid portion, prolonging of the sub-electrode section sideline vertical with interconnection direction
The intersection point in the sideline in the outside with adjacent assisted parts for the long line is set to D point, the width of sub-electrode section less than adjacent two D points it
Between length.
Wherein, the width of sub-electrode section is less than the Breadth Maximum in main grid portion.
Preferably, the live width in main grid portion is 2mm～10mm.It is further preferred that the live width in main grid portion is 2.5mm～5mm.
Preferably, the live width of one end near sub-electrode section, main grid portion is 3mm～10mm, and main grid portion is away from sub-electrode section
The live width of one end is 0.05mm～5mm.It is further preferred that the live width of one end that main grid portion is near sub-electrode section be 3mm～
6mm, the live width of one end away from sub-electrode section, main grid portion is 0.1mm～3mm.
Preferably, the live width in grid line portion is 0.05mm～0.5mm.It is further preferred that the live width in grid line portion be 0.1mm～
0.4mm.
Preferably, the live width of assisted parts one end near sub-electrode section is 2mm～10mm, and assisted parts is away from sub-electrode section
The live width of one end is 0.05mm～1mm.It is further preferred that the live width of one end that assisted parts is near sub-electrode section be 3mm～
5mm, the live width of assisted parts one end away from sub-electrode section is 0.1mm～0.6mm.
Preferably, the gross area of back electrode is the 0.1%～3% of the back side gross area of two-sided PERC solar battery sheet.
It is further preferred that the 0.2%～2% of the back side gross area that the gross area of back electrode is two-sided PERC solar battery sheet.
Wherein, back electrode is back of the body silver, and main grid portion, assisted parts and grid line portion are back of the body aluminium.
Beneficial effects of the present invention：A kind of two-sided PERC solar cell back face grid line structure, including some row back of the body electricity
Pole and grid line portion, back electrode includes several edge interconnection direction spaced sub-electrode sections, in same row back electrode, adjacent
The symmetrical center line of two sub-electrode sections be set to A line, A line is perpendicular with back electrode, the end of sub-electrode section and adjacent A line
Between be provided with main grid portion, two adjacent sub-electrode sections are by two main grid portions electrical connection between the two, two adjacent row
The symmetrical center line of back electrode is set to B line, and B line is paralleled with back electrode, and A line is set to C point with the intersection point of B line, sub-electrode section
It is provided with assisted parts between end with adjacent C point.The setting of assisted parts so that the point away from sub-electrode section can be by auxiliary
Portion carries out electric current and collects, and can be transmitted directly to the electric current after collecting on back electrode, it is to avoid by main grid portion as intermediary again
The problem being transferred on back electrode, the two-sided PERC solar cell back face grid line structure of the present invention, add solar-electricity
The output electric current of pond assembly, improves the power output of solar module.
Brief description
Fig. 1 is the structural representation of embodiments of the invention one.
Fig. 2 is the structural representation of embodiments of the invention two.
Fig. 3 is the structural representation of embodiments of the invention three.
Fig. 4 is the structural representation of the comparative example one of the present invention.
Reference is as follows：
1-grid line portion；2-sub-electrode section；3-main grid portion；The 31-area of coverage；4-assisted parts；The secondary grid portion of 5-.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with Fig. 1 to Fig. 4 and by specific embodiment.
Embodiment one
As it is shown in figure 1, a kind of two-sided PERC solar cell back face grid line structure, Fig. 1 is showing of a unit cell
Being intended to, including some row back electrodes and grid line portion 1, back electrode includes several along interconnection direction spaced sub-electrode section
2, in same row back electrode, the symmetrical center line of two adjacent sub-electrode sections 2 is set to A line, and A line is perpendicular with back electrode, son
Being provided with main grid portion 3 between the end of electrode section 2 and adjacent A line, two adjacent sub-electrode sections 2 are by two between the two
Individual main grid portion 3 electrically connects, and the symmetrical center line of two adjacent row back electrodes is set to B line, and B line is paralleled with back electrode, A line and B
The intersection point of line is set to C point, is provided with assisted parts 4 between the end of sub-electrode section 2 with adjacent C point.
In the present embodiment, some row back electrodes are parallel to each other, and back electrode is with two-sided PERC solar battery sheet wherein
One limit is parallel.In other embodiments, some row back electrodes also can shift, it is also possible to not with the two-sided PERC sun
The limit of energy cell piece is parallel.
In the present embodiment, the identical length etc. of some row back electrodes.In other embodiments, it is possible to be arranged as required to not
Back electrode with length.
In the present embodiment, from the end of sub-electrode section 2 to C, the direction of point is gradually reduced the width of assisted parts 4.
In the present embodiment, the center line in main grid portion 3 is parallel to each other with the center line of back electrode.
In the present embodiment, main grid portion 3 is provided with the area of coverage 31 overlapping mutually with sub-electrode section 2, and the area of coverage 31 is along interconnection side
To height be 1mm.In other embodiments, the area of coverage 31 can be selected as required along the height in interconnection direction.For example, cover
District 31 can be 0.05mm, 0.1mm, 0.5mm, 1.5mm, 2mm, 3mm, 4mm or 5mm etc. along the height in interconnection direction.
In the present embodiment, main grid portion 3 is wide linear structure.The width of sub-electrode section 2 is less than or equal to the width in main grid portion 3
Degree, is provided with secondary grid portion 5 between two main grid portions 3 at sub-electrode section 2 two ends, secondary grid portion 5 is positioned at the outside of sub-electrode section 2.
In the present embodiment, the live width in main grid portion 3 is 3mm.In other embodiments, main grid portion 3 can be selected as required
Live width.For example, the live width in main grid portion 3 can be 2mm, 2.5mm, 4mm, 5mm, 8mm or 10mm etc..
In the present embodiment, the live width in grid line portion 1 is 0.3mm.In other embodiments, grid line portion 1 can be selected as required
Live width.For example, the live width in grid line portion 1 can be 0.05mm, 0.1mm, 0.2mm, 0.4mm or 0.5mm etc..
In the present embodiment, the live width of assisted parts 4 one end near sub-electrode section 2 is 3mm, and assisted parts 4 is away from sub-electrode section 2
The live width of one end be 0.3mm.In other embodiments, can select as required assisted parts 4 near and away from sub-electrode section 2
The live width of one end.For example, the live width of assisted parts 4 one end near sub-electrode section 2 can be 2mm, 4mm, 5mm, 6mm, 8mm or
10mm；The live width of assisted parts 4 one end away from sub-electrode section 2 can for 0.05mm, 0.1mm, 0.2mm, 0.4mm, 0.6mm,
0.8mm or 1mm etc..
In the present embodiment, the gross area of back electrode is the 1% of the back side gross area of two-sided PERC solar battery sheet.At it
In his embodiment, can select as required the gross area of back electrode account for two-sided PERC solar battery sheet the back side gross area hundred
Proportion by subtraction.For example, the gross area of back electrode can for two-sided PERC solar battery sheet the back side gross area the 0.1%th, the 0.2%th,
0.5%th, 2% or 3% etc..
In the present embodiment, back electrode is back of the body silver, and main grid portion the 3rd, assisted parts 4 and grid line portion 1 are back of the body aluminium.In other embodiments
In, back electrode, main grid portion 3 and the grid line portion 1 of other materials can be selected as required.
Embodiment two
As in figure 2 it is shown, a kind of two-sided PERC solar cell back face grid line structure, Fig. 2 is showing of a unit cell
Being intended to, including some row back electrodes and grid line portion 1, back electrode includes several along interconnection direction spaced sub-electrode section
2, in same row back electrode, the symmetrical center line of two adjacent sub-electrode sections 2 is set to A line, and A line is perpendicular with back electrode, son
Being provided with main grid portion 3 between the end of electrode section 2 and adjacent A line, two adjacent sub-electrode sections 2 are by two between the two
Individual main grid portion 3 electrically connects, and the symmetrical center line of two adjacent row back electrodes is set to B line, and B line is paralleled with back electrode, A line and B
The intersection point of line is set to C point, is provided with assisted parts 4 between the end of sub-electrode section 2 with adjacent C point.
In the present embodiment, some row back electrodes are parallel to each other, and back electrode is with two-sided PERC solar battery sheet wherein
One limit is parallel.In other embodiments, some row back electrodes also can shift, it is also possible to not with the two-sided PERC sun
The limit of energy cell piece is parallel.
In the present embodiment, the identical length etc. of some row back electrodes.In other embodiments, it is possible to be arranged as required to not
Back electrode with length.
In the present embodiment, from the end of sub-electrode section 2 to C, the direction of point is gradually reduced the width of assisted parts 4.
In the present embodiment, the center line in main grid portion 3 is parallel to each other with the center line of back electrode.
In the present embodiment, main grid portion 3 is provided with the area of coverage 31 overlapping mutually with sub-electrode section 2, and the area of coverage 31 is along interconnection side
To height be 1mm.In other embodiments, the area of coverage 31 can be selected as required along the height in interconnection direction.For example, cover
District 31 can be 0.05mm, 0.1mm, 0.5mm, 1.5mm, 2mm, 3mm, 4mm or 5mm etc. along the height in interconnection direction.
In the present embodiment, main grid portion 3 is wide linear structure.The width of sub-electrode section 2 is more than the width in main grid portion 3,
The intersection point in the sideline in the outside with adjacent assisted parts 4 for the extended line in sub-electrode section 2 sideline vertical with interconnection direction is set to D
Point, the width of sub-electrode section 2 is less than the length between two adjacent D points.
In the present embodiment, the live width in main grid portion 3 is 2mm～10mm.In the present embodiment, the live width in main grid portion 3 is 3mm.?
In other embodiments, the live width in main grid portion 3 can be selected as required.For example, the live width in main grid portion 3 can for 2mm, 2.5mm,
4mm, 5mm, 8mm or 10mm etc..
In the present embodiment, the live width in grid line portion 1 is 0.3mm.In other embodiments, grid line portion 1 can be selected as required
Live width.For example, the live width in grid line portion 1 can be 0.05mm, 0.1mm, 0.2mm, 0.4mm or 0.5mm etc..
In the present embodiment, the live width of assisted parts 4 one end near sub-electrode section 2 is 3mm, and assisted parts 4 is away from sub-electrode section 2
The live width of one end be 0.3mm.In other embodiments, can select as required assisted parts 4 near and away from sub-electrode section 2
The live width of one end.For example, the live width of assisted parts 4 one end near sub-electrode section 2 can be 2mm, 4mm, 5mm, 6mm, 8mm or
10mm；The live width of assisted parts 4 one end away from sub-electrode section 2 can for 0.05mm, 0.1mm, 0.2mm, 0.4mm, 0.6mm,
0.8mm or 1mm etc..
In the present embodiment, the gross area of back electrode is the 1.5% of the back side gross area of two-sided PERC solar battery sheet.?
In other embodiments, the gross area of back electrode can be selected as required to account for the back side gross area of two-sided PERC solar battery sheet
Percentage.For example, the gross area of back electrode can for two-sided PERC solar battery sheet the back side gross area the 0.1%th,
0.2%th, the 0.5%th, 2% or 3% etc..
In the present embodiment, back electrode is back of the body silver, and main grid portion the 3rd, assisted parts 4 and grid line portion 1 are back of the body aluminium.In other embodiments
In, back electrode, main grid portion 3 and the grid line portion 1 of other materials can be selected as required.
Embodiment three
As it is shown on figure 3, a kind of two-sided PERC solar cell back face grid line structure, Fig. 3 is showing of a unit cell
Being intended to, including some row back electrodes and grid line portion 1, back electrode includes several along interconnection direction spaced sub-electrode section
2, in same row back electrode, the symmetrical center line of two adjacent sub-electrode sections 2 is set to A line, and A line is perpendicular with back electrode, son
Being provided with main grid portion 3 between the end of electrode section 2 and adjacent A line, two adjacent sub-electrode sections 2 are by two between the two
Individual main grid portion 3 electrically connects, and the symmetrical center line of two adjacent row back electrodes is set to B line, and B line is paralleled with back electrode, A line and B
The intersection point of line is set to C point, is provided with assisted parts 4 between the end of sub-electrode section 2 with adjacent C point.
In the present embodiment, some row back electrodes are parallel to each other, and back electrode is with two-sided PERC solar battery sheet wherein
One limit is parallel.In other embodiments, some row back electrodes also can shift, it is also possible to not with the two-sided PERC sun
The limit of energy cell piece is parallel.
In the present embodiment, the identical length etc. of some row back electrodes.In other embodiments, it is possible to be arranged as required to not
Back electrode with length.
In the present embodiment, from the end of sub-electrode section 2 to C, the direction of point is gradually reduced the width of assisted parts 4.
In the present embodiment, the center line in main grid portion 3 is parallel to each other with the center line of back electrode.
In the present embodiment, main grid portion 3 is provided with the area of coverage 31 overlapping mutually with sub-electrode section 2, and the area of coverage 31 is along interconnection side
To height be 1mm.In other embodiments, the area of coverage 31 can be selected as required along the height in interconnection direction.For example, cover
District 31 can be 0.05mm, 0.1mm, 0.5mm, 1.5mm, 2mm, 3mm, 4mm or 5mm etc. along the height in interconnection direction.
In the present embodiment, the width in main grid portion 3 is gradually reduced from the end of sub-electrode section 2 to the direction of A line.Sub-electrode section
The width of 2, less than the Breadth Maximum in main grid portion 3, is provided with secondary grid portion 5, secondary grid between two main grid portions 3 at sub-electrode section 2 two ends
Portion 5 is positioned at the outside of sub-electrode section 2.
In the present embodiment, the live width of one end near sub-electrode section 2, main grid portion 3 is 5mm, and main grid portion 3 is away from sub-electrode section 2
The live width of one end be 2mm.In other embodiments, can select as required main grid portion 3 near and away from sub-electrode section 2 one
The live width of end.For example, the live width of one end near sub-electrode section 2, main grid portion 3 can be 3mm, 4mm, 6mm, 8mm or 10mm etc.,
The live width of one end away from sub-electrode section 2, main grid portion 3 can be 0.05mm, 0.1mm, 1mm, 3mm, 4mm or 5mm etc..
In the present embodiment, the live width in grid line portion 1 is 0.3mm.In other embodiments, grid line portion 1 can be selected as required
Live width.For example, the live width in grid line portion 1 can be 0.05mm, 0.1mm, 0.2mm, 0.4mm or 0.5mm etc..
In the present embodiment, the live width of assisted parts 4 one end near sub-electrode section 2 is 3mm, and assisted parts 4 is away from sub-electrode section 2
The live width of one end be 0.3mm.In other embodiments, can select as required assisted parts 4 near and away from sub-electrode section 2
The live width of one end.For example, the live width of assisted parts 4 one end near sub-electrode section 2 can be 2mm, 4mm, 5mm, 6mm, 8mm or
10mm；The live width of assisted parts 4 one end away from sub-electrode section 2 can for 0.05mm, 0.1mm, 0.2mm, 0.4mm, 0.6mm,
0.8mm or 1mm etc..
In the present embodiment, the gross area of back electrode is the 1% of the back side gross area of two-sided PERC solar battery sheet.At it
In his embodiment, can select as required the gross area of back electrode account for two-sided PERC solar battery sheet the back side gross area hundred
Proportion by subtraction.For example, the gross area of back electrode can for two-sided PERC solar battery sheet the back side gross area the 0.1%th, the 0.2%th,
0.5%th, 2% or 3% etc..
In the present embodiment, back electrode is back of the body silver, and main grid portion the 3rd, assisted parts 4 and grid line portion 1 are back of the body aluminium.In other embodiments
In, back electrode, main grid portion 3 and the grid line portion 1 of other materials can be selected as required.
Comparative example one
As shown in Figure 4, being two-sided PERC solar cell back face of the prior art grid line structure, Fig. 4 is a list
The schematic diagram of bit location.Comparative example one differs only in embodiment one, and comparative example one is not provided with the auxiliary in embodiment one
Portion 4, other are all identical with embodiment one.
The power output of the power output of the three of the present invention embodiments and comparative example one is carried out contrast test, test knot
Fruit is as shown in table 1.
Table 1
| Pmax(W) | |
| Embodiment one | 298.5 |
| Embodiment two | 297.5 |
| Embodiment three | 299.0 |
| Comparative example one | 296.0 |
As shown in Table 1, compared with existing two-sided PERC solar battery sheet, the two-sided PERC solar cell of the present invention
The power output of piece is obviously improved.
Above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention's
Thought, all will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Restriction.
Claims (14)
1. a two-sided PERC solar cell back face grid line structure, including some row back electrodes and grid line portion (1), it is special
Levying and being, described back electrode includes several along interconnection direction spaced sub-electrode section (2), the described back electrode of same row
In, the symmetrical center line of two adjacent described sub-electrode sections (2) is set to A line, and described A line is perpendicular with described back electrode, institute
State the main grid portion (3) that is provided with between the end of sub-electrode section (2) and adjacent described A line, two adjacent described sub-electrode sections
(2) by two described main grid portion (3) electrical connections between the two, the symmetrical center line that adjacent two arrange described back electrode is set to
B line, described B line parallels with described back electrode, and described A line is set to C point with the intersection point of described B line, described sub-electrode section (2)
It is provided with assisted parts (4) between end and adjacent described C point.
2. two-sided PERC solar cell back face according to claim 1 grid line structure, it is characterised in that described auxiliary
The width in portion (4) is gradually reduced from the end of described sub-electrode section (2) to the direction of described C point.
3. two-sided PERC solar cell back face according to claim 1 grid line structure, it is characterised in that described main grid
The center line in portion (3) is parallel to each other with the center line of described back electrode.
4. two-sided PERC solar cell back face according to claim 1 grid line structure, it is characterised in that described main grid
Portion (3) is provided with the area of coverage (31) overlapping mutually with described sub-electrode section (2), and the described area of coverage (31) is along the height in interconnection direction
It is 0.05～5mm.
5. the two-sided PERC solar cell back face grid line structure according to any one of Claims 1-4, its feature exists
In described main grid portion (3) is wide linear structure.
6. the two-sided PERC solar cell back face grid line structure according to any one of Claims 1-4, its feature exists
In the width of described main grid portion (3) is gradually reduced from the end of described sub-electrode section (2) to the direction of described A line.
7. two-sided PERC solar cell back face according to claim 5 grid line structure, it is characterised in that described son electricity
The width of pole section (2) is less than or equal to the width of described main grid portion (3).
8. two-sided PERC solar cell back face according to claim 7 grid line structure, it is characterised in that described son electricity
Being provided with secondary grid portion (5) between two described main grid portions (3) at pole section (2) two ends, described secondary grid portion (5) is positioned at described sub-electrode
The outside of section (2).
9. two-sided PERC solar cell back face according to claim 5 grid line structure, it is characterised in that described son electricity
The width of pole section (2) is more than the width of described main grid portion (3), prolonging of described sub-electrode section (2) sideline vertical with interconnection direction
The intersection point in the sideline in the outside with adjacent described assisted parts (4) for the long line is set to D point, and the width of described sub-electrode section (2) is less than
The adjacent length between two described D points.
10. two-sided PERC solar cell back face according to claim 6 grid line structure, it is characterised in that described son
The width of electrode section (2) is less than the Breadth Maximum of described main grid portion (3).
11. two-sided PERC solar cell back face according to claim 5 grid line structures, it is characterised in that described master
The live width in grid portion (3) is 2mm～10mm.
12. two-sided PERC solar cell back face according to claim 6 grid line structures, it is characterised in that described master
The live width near one end of described sub-electrode section (2) for the grid portion (3) is 3mm～10mm, and described main grid portion (3) is away from described sub-electrode
The live width of one end of section (2) is 0.05mm～0.5mm.
13. two-sided PERC solar cell back face according to claim 1 grid line structures, it is characterised in that described auxiliary
Helping the live width near one end of described sub-electrode section (2) for the portion (4) to be 2mm～10mm, described assisted parts (4) is away from described sub-electrode
The line segment of one end of section (2) is 0.05mm～1mm.
14. two-sided PERC solar cell back face according to claim 1 grid line structures, it is characterised in that the described back of the body
Electrode is back of the body silver, and described main grid portion (3), described assisted parts (4) and described grid line portion (1) are back of the body aluminium.
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| WO2018157822A1 (en) * | 2017-03-03 | 2018-09-07 | 广东爱旭科技股份有限公司 | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method |
| EP3591714A4 (en) * | 2017-03-03 | 2020-12-30 | Guangdong Aiko Solar Energy Technology Co., Ltd. | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method therefor |
| EP3588585A4 (en) * | 2017-03-03 | 2021-01-06 | Guangdong Aiko Solar Energy Technology Co., Ltd. | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method therefor |
| EP3591715A4 (en) * | 2017-03-03 | 2021-01-13 | Guangdong Aiko Solar Energy Technology Co., Ltd. | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method therefor |
| WO2021008474A1 (en) * | 2019-07-16 | 2021-01-21 | 苏州携创新能源科技有限公司 | Solar cell and photovoltaic module |
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| CN206194768U (en) * | 2016-10-08 | 2017-05-24 | 苏州阿特斯阳光电力科技有限公司 | Two -sided PERC solar wafer back bars line knot constructs |
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| CN202977433U (en) * | 2012-12-12 | 2013-06-05 | 英利能源（中国）有限公司 | Rear main grid line of solar battery piece and solar battery piece |
| CN204991723U (en) * | 2015-08-18 | 2016-01-20 | 广东爱康太阳能科技有限公司 | Solar cell electrode |
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| WO2018157822A1 (en) * | 2017-03-03 | 2018-09-07 | 广东爱旭科技股份有限公司 | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method |
| EP3591714A4 (en) * | 2017-03-03 | 2020-12-30 | Guangdong Aiko Solar Energy Technology Co., Ltd. | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method therefor |
| EP3588585A4 (en) * | 2017-03-03 | 2021-01-06 | Guangdong Aiko Solar Energy Technology Co., Ltd. | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method therefor |
| EP3591715A4 (en) * | 2017-03-03 | 2021-01-13 | Guangdong Aiko Solar Energy Technology Co., Ltd. | P-type perc double-sided solar cell, assembly thereof, system thereof and preparation method therefor |
| US10964828B2 (en) | 2017-03-03 | 2021-03-30 | Guangdong Aiko Solar Energy Technology Co., Ltd. | Bifacial P-type PERC solar cell and module, system, and preparation method thereof |
| WO2021008474A1 (en) * | 2019-07-16 | 2021-01-21 | 苏州携创新能源科技有限公司 | Solar cell and photovoltaic module |
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| CN106449834B (en) | 2018-01-23 |
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