CN102403374A - Solar cell plate, solar cell string and solar cell assembly - Google Patents
Solar cell plate, solar cell string and solar cell assembly Download PDFInfo
- Publication number
- CN102403374A CN102403374A CN2011103511946A CN201110351194A CN102403374A CN 102403374 A CN102403374 A CN 102403374A CN 2011103511946 A CN2011103511946 A CN 2011103511946A CN 201110351194 A CN201110351194 A CN 201110351194A CN 102403374 A CN102403374 A CN 102403374A
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- grid line
- battery sheet
- solar battery
- solar cell
- main grid
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- 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 relates to a solar cell plate. A thin grid line and a main grid line are disposed on the front surface of the solar cell plate at the same time, and the current generated by the solar cell plate is converged to the main grid line with small sun shading area from the thin grid line and then are transmitted to back electrode or back electric field on the back surface of another adjacent solar cell plate from the main grid line. The main grid line has small sun shading area, so higher current can be generated; each thin grid line is connected with at least one main grid line, and the current generated by the cell plate can be transmitted to the main grid line from the shortest thin grid line, so that low electric loss on the electrode is realized and electric energy using ratio of the cell plate is improved. The arrangement of conductive hole on the solar cell plate is avoided, working procedure of processing the conductive hole is reduced, filling of expensive conductive paste and complicated electrode wire connection on the back surface of the cell plate are not needed, and photoelectric conversion efficiency equivalent to that of high-efficiency solar cell is kept while manufacturing cost is reduced. The invention also provides a solar cell string and a solar cell assembly using the solar cell plate.
Description
Technical field
The invention belongs to photovoltaic or semiconductor applications, relate in particular to a kind of solar battery sheet and use the solar cell string and the solar module of this solar battery sheet.
Background technology
As shown in Figure 1; Existing solar battery sheet (for example efficient MWT (Metal Wrap Through) battery sheet) comprises the silicon chip 91, diffusion layer 92 and the antireflective coating 93 that are cascading; Antireflective coating 93 upper surfaces are provided with some the thin grid lines 94 that are used for conduction current; Every thin grid line 94 parallel settings; Silicon chip 91 lower surfaces are provided with at least one positive electrode 95 and at least one negative electrode 96, isolate through insulation tank 97 between positive electrode 95 and the negative electrode 96, on silicon chip 91, diffusion layer 92 and antireflective coating 93, offer at least one conductive hole that runs through 98; Be filled with electrocondution slurry 99 in the conductive hole 98, every thin grid line 94 is through electrocondution slurry in the conductive hole 98 99 and negative electrode 96 mutual conduction.
Under illumination; The electric current that solar battery sheet produces is converged on the negative electrode 96 through the electrocondution slurry 99 in the conductive hole 98 by thin grid line 94 and derives; Because the negative electrode 96 that is used to converge electric current is arranged at the back side of battery sheet; Reduce the positive shading area of battery sheet, increased the positive effective plane of illumination of battery sheet, thereby improved the unit are energy output of battery sheet.
But this solar battery sheet also has following deficiency: because the thin grid line 94 in battery sheet front is a lot, therefore need on the battery sheet, processes a lot of conductive holes 98 and be connected with the negative electrode 96 of cell back face, cause complex procedures, manufacturing cost is high.
Summary of the invention
The object of the present invention is to provide the solar battery sheet of a kind of unit are energy output height, low cost of manufacture.
In order to solve the problems of the technologies described above; The invention provides a kind of solar battery sheet; Comprise the silicon chip, diffusion layer and the antireflective coating that are cascading, said antireflective coating upper surface is provided with some the thin grid lines that are used for conduction current, and said silicon chip lower surface is provided with at least one back of the body electric field; Perhaps said silicon chip lower surface is provided with at least one back electrode and back of the body electric field; Said some thin grid lines are arranged in a crossed manner or be combined to form the pattern of definite shape, and said antireflective coating upper surface also is provided with at least one and is used for conduction current and the little main grid line of shading area, and every said thin grid line all is connected with at least one said main grid line.
Particularly, said main grid line is positioned at the edge of said battery sheet.
Particularly, be connected with 2 ~ 20 said thin grid lines on every said main grid line.
Particularly, the wire spoke of said thin grid line is the 10-200 micron.
Particularly, the wire spoke of said main grid line is less than or equal to 1 mm.
Particularly, the pattern that is combined to form of said some thin grid lines is rhombus, rectangle, dendroid or netted.
Particularly, the length of said solar battery sheet is 3 ~ 40cm, and width is 1 ~ 15cm, and thickness is 0. 08 ~ 2mm.
The present invention also provides a kind of solar cell string; Said solar cell string adopts foregoing solar battery sheet to process, and the main grid line on the said wherein solar battery sheet is connected with back electrode on adjacent said another solar battery sheet through the band that confluxes.
The present invention also provides a kind of solar module, and said solar module adopts the described solar cell string encapsulation of claim 8 to process.
Particularly, the encapsulation step of solar module is following:
(1) laminated laying: EVA, glass fiber, the backboard of solar cell string, glass and well cutting are laid according to certain level, prepare lamination, glass is coated with one deck bonding reagent in advance to increase the adhesive strength of glass and EVA;
(2) component lamination: the battery strings that will lay is put into laminating machine, through vacuumizing the air in the assembly is extracted out, and heating makes the EVA fusing then, and battery, glass and backboard are bonded together, and assembly is taken out in cooling at last;
(3) rim frame: to glass assembly dress aluminium frame, to improve the intensity of assembly.
The present invention will be through being located at thin grid line and main grid line the front of solar battery sheet simultaneously; Thin grid line and main grid line are the negative pole of solar battery sheet; The electric current that solar battery sheet produces converges to the little main grid line of shading area by thin grid line; Reached the back electrode of another adjacent solar cell back face or carry on the back electric field through the band that confluxes by the main grid line again, back electrode or back of the body electric field are the positive pole of solar battery sheet.Because main grid line shading area is little, thereby can produce bigger electric current; In addition; Because every thin grid line setting intersected with each other, and every thin grid line is connected with at least one main grid line, so the electric current of battery sheet generation can be passed to the main grid line from the thin grid line that length is lacked most; Electric energy loss on the electrode is little, has improved the utilization rate of electrical of solar battery sheet.
Compared with prior art; The present invention has avoided on solar battery sheet, offering conductive hole; Reduce the conductive hole manufacturing procedure; Do not need expensive electrocondution slurry and, when reducing manufacturing cost, kept the photoelectric conversion efficiency suitable with high performance solar batteries at the complicated ground electrode line of cell back face.
Description of drawings
In order to be illustrated more clearly in technical scheme of the present invention; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the cutaway view of the solar battery sheet that provides of prior art.
Fig. 2 is the cutaway view of the solar battery sheet that provides of the embodiment of the invention one.
Fig. 3 is thin grid line and the distribution map of main grid line on the antireflective coating of solar battery sheet that the embodiment of the invention one provides.
Fig. 4 is the connection sketch map of two solar battery sheets providing of the embodiment of the invention one.
Fig. 5 is the cutaway view of the solar battery sheet that provides of the embodiment of the invention two.
Fig. 6 is thin grid line and the distribution map of main grid line on the antireflective coating of solar battery sheet that the embodiment of the invention two provides.
Fig. 7 is the connection sketch map of two solar battery sheets providing of the embodiment of the invention two.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention will be carried out clear, intactly description.
Embodiment one
As shown in Figures 2 and 3; A kind of solar battery sheet 1 that the embodiment of the invention one provides; Its length is 3 ~ 40cm; Width is 1 ~ 15cm, and thickness is 0. 08 ~ 2mm, and this solar battery sheet 1 comprises silicon chip 11, diffusion layer 12 and the antireflective coating 13 that is cascading; Antireflective coating 13 upper surfaces are provided with some the thin grid lines 14 and at least one that are used for conduction current and are used for conduction current and the little main grid line 15 of shading area; Said some thin grid lines 14 are arranged in a crossed manner or be combined to form the pattern (like rhombus, rectangle, dendroid or shape such as netted) of definite shape, and said every thin grid line 14 all is connected with at least one main grid line 15, and said silicon chip 11 lower surfaces are provided with at least one back of the body electric field 16.Wherein, thin grid line 14 is the negative pole of solar battery sheet 1 with main grid line 15, and back of the body electric field 16 is the positive pole of solar battery sheet 1.
Because main grid line 15 shading areas are little, thereby can produce bigger electric current; In addition; Because every thin grid line 14 settings intersected with each other; And every thin grid line 14 is connected with at least one main grid line 15; Therefore the electric current of solar battery sheet 1 generation can be passed to main grid line 15 from the thin grid line 14 that length is lacked most, and the electric energy loss on the electrode is little, has improved the utilization rate of electrical of solar battery sheet 1.
As shown in Figure 4, the connected mode between two solar battery sheets 1 that present embodiment one provides is: the positive main grid line 15 of a solar battery sheet 1 confluxes through one and is connected with the back of the body electric field 16 at adjacent another solar battery sheet 1 back side with 17.
Different with prior art; Present embodiment one will be through being located at thin grid line 14 and main grid line 15 front of solar battery sheet 1 simultaneously; The electric current that solar battery sheet 1 produces converges to main grid line 15 by thin grid line 14, again by the back of the body electric field 16 of main grid line 15 through confluxing and reaching another adjacent solar battery sheet 1 back side with 17.Because present embodiment one has been avoided on solar battery sheet 1, offering conductive hole; Reduced the conductive hole manufacturing procedure; Need not fill expensive electrocondution slurry and at the back side of battery sheet 1 complicated ground electrode line, when reducing manufacturing cost, kept the photoelectric conversion efficiency suitable with high performance solar batteries.
In the present embodiment one; Said main grid line 15 is located at the edge of solar battery sheet 1; That is main grid line 15 is positioned at the edge of antireflective coating 13, thereby reduced to connect the confluxing with 17 length, like this of back of the body electric field 16 on main grid line 15 and the adjacent solar battery sheet 1; Electric current on converging to main grid line 15 from conflux with 17 reach on the adjacent solar battery sheet 1 back of the body electric field 16 time; Electric current is with on 17 that resistance also reduces when transmitting confluxing, thereby has reduced the loss of electric energy, has further improved the utilization rate of electrical of solar battery sheet 1.Simultaneously, because main grid line 15 is located at the edge of solar battery sheet 1, when solar battery sheet 1 was interconnected, it was little with 17 shading area to conflux, so solar battery sheet 1 can produce more multiple carrier.
In the present embodiment one; Be connected with 2 ~ 20 thin grid lines 14 on the every main grid line 15, this is that the electric current that converges on the main grid line 15 can be excessive because thin grid line 14 intercell connector numbers are too much; Cause electric current to be with on 17 the resistance consumed power excessive with confluxing, cause energy loss at main grid line 15.
In the present embodiment one, the wire spoke of said thin grid line 14 is the 10-200 micron, and the wire spoke of said main grid line 15 is less than or equal to 1 mm.
As shown in Figure 4; Present embodiment one also provides a kind of solar cell string; It adopts foregoing solar battery sheet 1 to process, wherein the main grid line 15 on the solar battery sheet 1 through one conflux with 17 with adjacent another solar battery sheet 1 on back of the body electric field 16 be connected.
In addition, present embodiment one also provides a kind of solar module (not shown), adopts foregoing solar cell string encapsulation to process, and the concrete steps of encapsulation are following:
(1) laminated laying: EVA (ethylene-vinyl acetate copolymer), glass fiber, the backboard of solar cell string, glass and well cutting are laid according to certain level; Prepare lamination, glass is coated with one deck bonding reagent in advance to increase the adhesive strength of glass and EVA;
(2) component lamination: the battery strings that will lay is put into laminating machine, through vacuumizing the air in the assembly is extracted out, and heating makes the EVA fusing then, and battery, glass and backboard are bonded together, and assembly is taken out in cooling at last;
(3) rim frame: to glass assembly dress aluminium frame, to improve the intensity of assembly.
Embodiment two
Like Fig. 5 and shown in Figure 6; A kind of solar battery sheet 2 that the embodiment of the invention two provides; Its length is 3 ~ 40cm; Width is 1 ~ 15cm, and thickness is 0. 08 ~ 2mm, and this solar battery sheet 2 comprises silicon chip 21, diffusion layer 22 and the antireflective coating 23 that is cascading; Antireflective coating 23 upper surfaces be provided with some the thin grid lines 24 and at least one that are used for conduction current be used for conduction current and shading area little main grid line 25; Said some thin grid lines 24 are arranged in a crossed manner or be combined to form the pattern (like rhombus, rectangle, dendroid or shape such as netted) of definite shape, and said every thin grid line 24 all is connected with at least one main grid line 25, and said silicon chip 21 lower surfaces are provided with at least one back electrode 26 and back of the body electric field 27.Wherein, thin grid line 24 is the negative pole of solar battery sheet 2 with main grid line 25, and back electrode 26 is the positive pole of solar battery sheet 2 with back of the body electric field 27.
Because main grid line 25 shading areas are little, thereby can produce bigger electric current; In addition; Because every thin grid line 24 settings intersected with each other; And every thin grid line 24 is connected with at least one main grid line 25; Therefore the electric current of solar battery sheet 2 generations can be passed to main grid line 25 from the thin grid line 24 that length is lacked most, and the electric energy loss on the electrode is little, has improved the utilization rate of electrical of solar battery sheet 2.
As shown in Figure 7, the connected mode between two solar battery sheets 2 that present embodiment two provides is: the positive main grid line 25 of a solar battery sheet 2 confluxes through one and is connected with the back electrode 26 at adjacent another solar battery sheet 2 back sides with 28.
Different with prior art; Present embodiment two will be through being located at thin grid line 24 and main grid line 25 front of solar battery sheet 2 simultaneously; The electric current that solar battery sheet 2 produces converges to main grid line 25 by thin grid line 24, again by the back electrode 26 of main grid line 25 through confluxing and reaching another adjacent solar battery sheet 2 back sides with 28.Because present embodiment two has been avoided on solar battery sheet 2, offering conductive hole; Reduced the conductive hole manufacturing procedure; Need not fill expensive electrocondution slurry and at the back side of battery sheet 2 complicated ground electrode line, when reducing manufacturing cost, kept the photoelectric conversion efficiency suitable with high performance solar batteries.
In the present embodiment two; Said main grid line 25 is located at the edge of solar battery sheet 2; That is main grid line 25 is positioned at the edge of antireflective coating 23, thereby reduced to connect the confluxing with 28 length, like this of back electrode 26 on main grid line 25 and the adjacent solar battery sheet 2; Electric current on converging to main grid line 25 from conflux with 28 reach on the adjacent solar battery sheet 2 back electrode 26 time; Electric current is with on 28 that resistance also reduces when transmitting confluxing, thereby has reduced the loss of electric energy, has further improved the utilization rate of electrical of solar battery sheet 2.Simultaneously, because main grid line 25 is located at the edge of solar battery sheet 2, when solar battery sheet 2 was interconnected, it was little with 28 shading area to conflux, so solar battery sheet 2 can produce more multiple carrier.
In the present embodiment two; Be connected with 2 ~ 20 thin grid lines 24 on the every main grid line 25, this is that the electric current that converges on the main grid line 25 can be excessive because thin grid line 24 intercell connector numbers are too much; Cause electric current to be with on 28 the resistance consumed power excessive with confluxing, cause energy loss at main grid line 25.
In the present embodiment two, the wire spoke of said thin grid line 24 is the 10-200 micron, and the wire spoke of said main grid line 25 is less than or equal to 1 mm.
As shown in Figure 4; Present embodiment two also provides a kind of solar cell string; It adopts foregoing solar battery sheet 2 to process, wherein the main grid line 25 on the solar battery sheet 2 through one conflux with 28 with adjacent another solar battery sheet 2 on back electrode 26 be connected.
In addition, present embodiment two also provides a kind of solar module (not shown), adopts foregoing solar cell string encapsulation to process, and the concrete steps of encapsulation are following:
(1) laminated laying: EVA (ethylene-vinyl acetate copolymer), glass fiber, the backboard of solar cell string, glass and well cutting are laid according to certain level; Prepare lamination, glass is coated with one deck bonding reagent in advance to increase the adhesive strength of glass and EVA;
(2) component lamination: the battery strings that will lay is put into laminating machine, through vacuumizing the air in the assembly is extracted out, and heating makes the EVA fusing then, and battery, glass and backboard are bonded together, and assembly is taken out in cooling at last;
(3) rim frame: to glass assembly dress aluminium frame, to improve the intensity of assembly.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.
Claims (10)
1. solar battery sheet; Comprise the silicon chip, diffusion layer and the antireflective coating that are cascading; Said antireflective coating upper surface is provided with some the thin grid lines that are used for conduction current; Said silicon chip lower surface is provided with at least one back of the body electric field, and perhaps said silicon chip lower surface is provided with at least one back electrode and back of the body electric field, it is characterized in that: said some thin grid lines are arranged in a crossed manner or be combined to form the pattern of definite shape; Said antireflective coating upper surface also is provided with at least one and is used for conduction current and the little main grid line of shading area, and every said thin grid line all is connected with at least one said main grid line.
2. solar battery sheet as claimed in claim 1 is characterized in that: said main grid line is positioned at the edge of said solar battery sheet.
3. solar battery sheet as claimed in claim 1 is characterized in that: be connected with 2 ~ 20 said thin grid lines on the every said main grid line.
4. solar battery sheet as claimed in claim 1 is characterized in that: the wire spoke of said thin grid line is the 10-200 micron.
5. solar battery sheet as claimed in claim 1 is characterized in that the wire spoke of said main grid line is less than or equal to 1mm.
6. solar battery sheet as claimed in claim 1 is characterized in that, the pattern that said some thin grid lines are combined to form is rhombus, rectangle, dendroid or netted.
7. solar battery sheet as claimed in claim 1 is characterized in that, the length of said solar battery sheet is 3 ~ 40cm, and width is 1 ~ 15cm, and thickness is 0. 08 ~ 2mm.
8. solar cell string; It is characterized in that; Said solar cell string adopts each described solar battery sheet of claim 1 ~ 7 to process, and the main grid line on the said wherein solar battery sheet is through the back electrode on conflux band and adjacent said another solar battery sheet or carry on the back electric field and be connected.
9. a solar module is characterized in that, said solar module adopts the described solar cell string encapsulation of claim 8 to process.
10. solar module as claimed in claim 9 is characterized in that: its encapsulation step is following:
(1) laminated laying: EVA, glass fiber, the backboard of solar cell string, glass and well cutting are laid according to certain level, prepare lamination, glass is coated with one deck bonding reagent in advance to increase the adhesive strength of glass and EVA;
(2) component lamination: the battery strings that will lay is put into laminating machine, through vacuumizing the air in the assembly is extracted out, and heating makes the EVA fusing then, and battery, glass and backboard are bonded together, and assembly is taken out in cooling at last;
(3) rim frame: to glass assembly dress aluminium frame, to improve the intensity of assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103511946A CN102403374A (en) | 2011-11-09 | 2011-11-09 | Solar cell plate, solar cell string and solar cell assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103511946A CN102403374A (en) | 2011-11-09 | 2011-11-09 | Solar cell plate, solar cell string and solar cell assembly |
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| CN102403374A true CN102403374A (en) | 2012-04-04 |
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| CN2011103511946A Pending CN102403374A (en) | 2011-11-09 | 2011-11-09 | Solar cell plate, solar cell string and solar cell assembly |
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Cited By (7)
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| CN103094369A (en) * | 2013-01-15 | 2013-05-08 | 常州亿晶光电科技有限公司 | Wafer silicon metal wrap through (MWT) solar cell |
| CN103325876A (en) * | 2013-06-24 | 2013-09-25 | 英利集团有限公司 | Solar battery component |
| CN103346174A (en) * | 2013-06-24 | 2013-10-09 | 英利集团有限公司 | Solar cell and solar cell assembly |
| CN103633168A (en) * | 2013-11-14 | 2014-03-12 | 索日新能源股份有限公司 | Solar cell panel and power generation system comprising same |
| CN108735845A (en) * | 2018-07-16 | 2018-11-02 | 宁波尤利卡太阳能科技发展有限公司 | A kind of solar energy slice battery |
| CN110277467A (en) * | 2019-05-09 | 2019-09-24 | 周建军 | A kind of leaf figure line photovoltaic cell |
| CN113782624A (en) * | 2014-09-29 | 2021-12-10 | 瑞科斯太阳能源私人有限公司 | Solar cell with special front surface electrode design |
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| CN113782624A (en) * | 2014-09-29 | 2021-12-10 | 瑞科斯太阳能源私人有限公司 | Solar cell with special front surface electrode design |
| CN108735845A (en) * | 2018-07-16 | 2018-11-02 | 宁波尤利卡太阳能科技发展有限公司 | A kind of solar energy slice battery |
| CN110277467A (en) * | 2019-05-09 | 2019-09-24 | 周建军 | A kind of leaf figure line photovoltaic cell |
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Application publication date: 20120404 |