CN110010708A - A kind of solar battery sheet - Google Patents
A kind of solar battery sheet Download PDFInfo
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- CN110010708A CN110010708A CN201910252806.2A CN201910252806A CN110010708A CN 110010708 A CN110010708 A CN 110010708A CN 201910252806 A CN201910252806 A CN 201910252806A CN 110010708 A CN110010708 A CN 110010708A
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- back side
- main grid
- gate electrode
- front main
- solar battery
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- 238000003466 welding Methods 0.000 claims abstract description 55
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 239000010703 silicon Substances 0.000 claims abstract description 27
- 230000007704 transition Effects 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 abstract description 25
- 239000000463 material Substances 0.000 abstract description 9
- 238000005476 soldering Methods 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 39
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 7
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008646 thermal stress Effects 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
- H01L31/02—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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
The present invention provides a kind of solar battery sheets, comprising: silicon base, the front main grid electrode and back side primary gate electrode for being separately positioned on the silicon base front and the back side；Wherein, the end of front main grid electrode is provided with the arcuate structure outwardly protruded；And/or the both ends of back side primary gate electrode are in the arcuate structure outwardly protruded.Solar battery sheet provided by the invention, by setting arcuate structure for the end of front main grid electrode, the stress of welding region and non-solder region intersection when reducing welding；Arcuate structure is set by the both ends of back side primary gate electrode, to reduce the stress that welding space-time open region generates；Stress by alleviating cell piece front main grid electrode and back side primary gate electrode is concentrated, reduce between different materials because thermal expansion coefficient it is different caused by deformation quantity difference, and then the probability that crack and problem of faulty soldering occurs in primary gate electrode end can be effectively reduced.
Description
Technical field
The present invention relates to technical field of solar batteries, in particular to a kind of solar battery sheet.
Background technique
Existing solar battery sheet is easy to appear the crack at electrode main grid line both ends during assembly end series welding, through counting
Device process reprocess in bad problem be mainly reflected in crack (accounting about 5.8%) and rosin joint (accounting about 3%), wherein
In the case where crack is bad, the crack accounting at electrode main grid line both ends is about 35%.Although tune can be passed through during field adjustable
Whole scaling powder spraying position opens welding bending function and adjusts the measures such as welding position of the welding in electrode main grid line
It avoids the welding at electrode main grid line both ends and then achievees the purpose that reduce crack probability, but be limited to string welding machine stability and precision
Problem, can not be fully solved the crack problem at electrode main grid line both ends, and adjust the welding of scaling powder spraying position or welding
The dotted rosin joint that position is easy to appear electrode main grid line both ends is bad, influences the stability of processing procedure welding.
Summary of the invention
In consideration of it, the invention proposes a kind of solar battery sheets, it is intended to solve existing gate electrode line both ends and be easy to appear
The problem of crack and rosin joint phenomenon.
On one side, the invention proposes a kind of solar battery sheets, comprising: silicon base, setting the silicon base just
The front main grid electrode in face and the back side primary gate electrode that the silicon substrate bottom back side is set；Wherein, the front main grid electrode
End be provided with the arcuate structure outwardly protruded；And/or the both ends of the back side primary gate electrode are in the arc outwardly protruded
Structure.
Further, in above-mentioned solar battery sheet, the front main grid electrode includes: front main grid electrode body；Its
In, at least one arc-shaped structure in two ends of the front main grid electrode body.
Further, in above-mentioned solar battery sheet, the back side primary gate electrode includes: back side primary gate electrode ontology；Its
In, the arc-shaped structure in two ends of the back side primary gate electrode ontology.
Further, in above-mentioned solar battery sheet, the arcuate structure has at least one segmental arc, the segmental arc
For semi arch, circular arc or elliptic arc.
Further, in above-mentioned solar battery sheet, the arcuate structure includes: two segmental arcs and one rectangular section；
Wherein, two segmental arcs are connected to rectangular section of the both ends.
Further, in above-mentioned solar battery sheet, rectangular section of the width is greater than the front main grid electrode body
Or the width of the back side primary gate electrode ontology；And/or the maximum chord length of the segmental arc is greater than the front main grid electrode sheet
The width of body or the back side primary gate electrode ontology.
Further, in above-mentioned solar battery sheet, the arcuate structure includes: major arc section and two transition circle segmental arcs；
Wherein, two transition circle segmental arcs are connected to the both ends of the major arc section.
Further, in above-mentioned solar battery sheet, the radius of the transition circle segmental arc is less than or equal to the major arc section
Radius, also, the diameter of the major arc section is greater than the width of the front main grid electrode body or the back side primary gate electrode ontology
Degree.
Further, in above-mentioned solar battery sheet, the arcuate structure includes a semicircle segmental arc and the semi arch
Diameter and the front main grid electrode body of section or the back side primary gate electrode ontology it is of same size.
Further, in above-mentioned solar battery sheet, the arcuate structure includes multiple semicircle segmental arcs being sequentially connected；Its
In, the width of the diameter summation of each semicircle segmental arc and the front main grid electrode body or the back side primary gate electrode ontology
It is identical.
Further, in above-mentioned solar battery sheet, the front main grid electrode is multiple, edge on the silicon base front
Each front main grid electrode at the both ends in front main grid electrode length direction is provided with arcuate structure, and front main grid electricity
Welding starting point or welding end point of the arcuate structure of pole in the silicon base.
Further, in above-mentioned solar battery sheet, the back side primary gate electrode is spaced apart region along the back side main grid
Extend preset length in the both ends in electrode length direction.
Further, in above-mentioned solar battery sheet, the preset length is 1.0-2.0mm.
Solar battery sheet provided by the invention, by setting arcuate structure for the end of front main grid electrode, to subtract
The stress of welding region and non-solder region intersection when welding less；By setting arc knot for the both ends of back side primary gate electrode
Structure, to reduce the stress that welding space-time open region generates；By alleviating cell piece front main grid electrode and back side primary gate electrode
Stress concentration phenomenon, reduce between different materials because thermal expansion coefficient it is different caused by deformation quantity difference, and then can effectively drop
There is the probability of crack and problem of faulty soldering in low primary gate electrode end.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the positive structural schematic diagram of solar battery sheet provided in an embodiment of the present invention；
Fig. 2 is the distribution schematic diagram of solar battery sheet front main grid electrode provided in an embodiment of the present invention；
Fig. 3 is the partial enlarged view in Fig. 2 at B；
Fig. 4 is the distribution schematic diagram of solar cell back face provided in an embodiment of the present invention primary gate electrode；
Fig. 5 is the partial enlarged view in Fig. 4 at D；
Fig. 6 is a kind of structural schematic diagram of arcuate structure in solar battery sheet provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of arcuate structure in solar battery sheet provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of arcuate structure in solar battery sheet provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of arcuate structure in solar battery sheet provided in an embodiment of the present invention；
Figure 10 is the partial enlarged view of Fig. 9；
Figure 11 is a kind of structural schematic diagram of arcuate structure in solar battery sheet provided in an embodiment of the present invention；
Figure 12 is force analysis figure of the front main grid electrode in welding cooling procedure in the present invention；
Figure 13 is that back side primary gate electrode is welding the force analysis figure in cooling termination process in the prior art.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.It should be noted that in the absence of conflict, embodiment in the present invention and
Feature in embodiment can be combined with each other.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Refering to fig. 1, Fig. 3 and Fig. 4, the solar battery sheet of the embodiment of the present invention include: silicon base 1, are arranged in the silicon
The positive front main grid electrode 2 of substrate 1 and the back side primary gate electrode 3 that 1 back side of silicon base is set；Wherein, it is described just
The end of face primary gate electrode 2 is provided with the arcuate structure 4 outwardly protruded, welding region and non-solder region when reducing welding
The stress of intersection；And/or the both ends of the back side primary gate electrode 3 are in the arcuate structure 4 outwardly protruded, to reduce welding
The stress that space-time open region 6 generates.
Specifically, silicon base 1 can be p-type silicon substrate or n-type silicon substrate.Segmentation is printed in the front of silicon base 1
Formula silver paste；The segmented silver paste constitutes front main grid electrode 2, has aluminium paste and segmented silver paste in the back up of silicon base,
In, aluminium paste constitutes Al-BSF 5；Segmented silver paste constitutes back side primary gate electrode 3.In the intersection of silver paste and aluminium paste, have one piece not
The exposed region of printing slurry, silicon base separates the aluminium paste of the silver paste of back side primary gate electrode 3 and Al-BSF, this part is not printed
The region of slurry is known as being spaced apart region.Certainly, the solar battery sheet in the present embodiment can also include other and the prior art
Identical structure.
During by solar battery sheet component series welding, for the front main grid electrode 2 of battery, cell piece and welding
When undergoing cool down, since welding is different from the thermal expansion coefficient of silver paste and silicon substrate, in cooling procedure not
The deformation quantity generated with Material shrinkage is different, and the deformation of welding region is greater than the deformation in non-solder region in electrode main grid line,
The two intersection generates stress, continues in cooling procedure in cell piece, and stress is gradually increased, simultaneously because stress concentration phenomenon,
The two folding corner region stress contacted in welding region with non-solder region persistently increase；When front main grid electrode stress concentration point
Place's stress causes to crack at this when reaching certain value；Therefore, the end of front main grid electrode 2 is set as outwardly protruding
Arcuate structure 4, the stress of welding region and non-solder region intersection when can reduce welding.
For the back side primary gate electrode 3 of cell piece, back side welding 7 shrinking deformation, shape cell piece occurs in cooling procedure
Variable is greater than the deformation quantity of rear electrode and Al-BSF 5, is influenced be spaced apart the generation of region 6 stress by stress concentration, with cold
But the lasting carry out stress of process is gradually increased, and when reaching, 6 positions of certain value space-time open region are cracked, therefore, by the back side
The both ends of primary gate electrode 3 are disposed as arcuate structure 4, can reduce the stress that welding space-time open region 6 generates.
The both ends of setting outwardly protrudes in the end of front main grid electrode 2 arcuate structure 4 or back side primary gate electrode 3 are equal
In the arcuate structure 4 outwardly protruded can play alleviate stress concentrate to reduce battery front side main gate line both ends occur crack and
The probability of rosin joint phenomenon；Preferably, the both ends of the end of front main grid electrode 2 and back side primary gate electrode are arranged to arc
Structure 4 is concentrated with the stress for preferably reducing battery front side and the back side occurs in the welding process.In the present embodiment, convex
Refer to the length direction along front main grid electrode or back side primary gate electrode out, is protruded to the direction far from respective end.
It is above-mentioned obviously it can be concluded that, the solar battery sheet provided in the present embodiment, by by the end of front main grid electrode 2
Portion is set as arcuate structure 4, the stress of welding region and non-solder region intersection when reducing welding；By by back side main grid
The both ends of electrode are set as arcuate structure 4, to reduce the stress that welding space-time open region generates；By alleviating cell piece front master
The stress concentration phenomenon of gate electrode 2 and back side primary gate electrode 3, reduce between different materials because thermal expansion coefficient it is different caused by
Deformation quantity difference, and then the probability that crack and problem of faulty soldering occurs in primary gate electrode end can be effectively reduced.
In above-described embodiment, it is preferred that the front main grid electrode 2 be it is multiple, it is main along front on the silicon base front
Each front main grid electrode 2 at the both ends of 2 length direction of gate electrode is provided with arcuate structure 4, and the front main grid electrode 2
Welding starting point or welding end point of the arcuate structure 4 in the silicon base.
Specifically, the both ends of the positive all front main grid electrodes 2 of silicon base can be disposed as arcuate structure
4, since welding starting point and welding end point are located in silicon base along the two of primary gate electrode length direction on silicon base front
End, crack problem often have in welding starting point and welding end point, so arc knot is arranged at the end positions of cell piece front
Structure 4, on the one hand, targetedly reduce crack problem；On the other hand, being fabricated to for solar battery sheet is also saved
This.
Referring to fig. 2, in above-described embodiment, front main grid electrode 2 includes: front main grid electrode body 21；Wherein, it is described just
At least one arc-shaped structure 4 in two ends of face primary gate electrode ontology 21.
Specifically, front main grid electrode body 21 can in a strip shape or laminated structure, front main grid electrode body 21
One end is arcuate structure 4 or two ends are arcuate structure 4.Arcuate structure 4 can be by the identical Duan Yuan of radius
Arc or elliptic arc composition, can also be made of the identical circular arc of multistage radius or elliptic arc, can also be by different more of radius
Section circular arc or elliptic arc composition, the present embodiment are not limited in any way it.
Refering to Fig. 5, it illustrates the specific structure of back side primary gate electrode 3, in above-described embodiment, back side primary gate electrode 3 is wrapped
It includes: back side primary gate electrode ontology 31；Wherein, the arc-shaped structure 4 in two ends of back side primary gate electrode ontology 31.In practice,
Back side primary gate electrode 3 can also include the feeler 32 that overleaf 31 two sides of primary gate electrode ontology are arranged；
Specifically, back side primary gate electrode ontology 31 can be strip or laminated structure, overleaf primary gate electrode ontology 31
Several feelers 32 of two sides laid out in parallel, the overleaf primary gate electrode 31 of can equidistantly arranging in dentalation between each feeler
Two sides.The arcuate structure 4 at 31 both ends of back side primary gate electrode ontology can phase with the arcuate structure 4 on front main grid electrode body 21
Together, it can also be different.
Obviously it can be concluded that, overleaf arcuate structure 4 is arranged in the two of primary gate electrode ontology 31 end, can reduce
It is spaced apart the stress in region 33, is spaced apart the probability that crack problem occurs in region 33 to reduce.
With continued reference to Fig. 5 and Figure 12, in order to further decrease the stress that the cell piece back side is spaced apart region 33, the back side master
Extend preset length d along the both ends of 3 length direction of back side primary gate electrode in the region 33 that is spaced apart of gate electrode 3.Preferably, institute
Stating preset length is 1.0-2.0mm, and the distance that is spaced apart of 1.0-2.0mm reduces welding deformation suffered by the primary gate electrode of the back side and answers
Power, while can reduce to avoid as being spaced apart the Al-BSF area caused by too long, and then lead to solar battery sheet efficiency
The problem of reduction.
Referring to fig. 2,3,5-10, in the various embodiments described above, arcuate structure 4 has at least one segmental arc, and segmental arc is half
Circular arc, circular arc or elliptic arc.
Specifically, that is to say, that the arcuate structure 4 in front main grid electrode 2 and back side primary gate electrode 3 all has one
Or multiple arcs section, segmental arc are semi arch, circular arc or elliptic arc；When segmental arc is semi arch or circular arc, each arc
The radius of section can it is identical can also be different.
With continued reference to Fig. 2, as a specific embodiment of above-described embodiment, the arcuate structure 4 includes: two arcs
Shape section and one rectangular section 42；Wherein, two segmental arcs 41 are connected to rectangular section 42 of the both ends.
Specifically, rectangular section 42 can be rectangular configuration, segmental arc 41 can be semi arch, circular arc or elliptic arc, side
Two segmental arcs 41 at shape section and its both ends can be integrally formed, and constitute a capsule-like structure.
Preferably, rectangular section 42 of the width is greater than the front main grid electrode body 21 or the back side primary gate electrode
The width of ontology 31；And/or the maximum chord length of the segmental arc 41 is greater than the front main grid electrode body 21 or the back side
The width of primary gate electrode ontology 31.That is, only rectangular section 42 of width is greater than front main grid electrode body 21 or back side master
The width of gate electrode ontology 31, or only the maximum chord length of segmental arc 41 is greater than front main grid electrode body 21 or back side master
The width or both the above situation of gate electrode ontology 31 meet simultaneously.Wherein, for front main grid electrode 2, side
The width of shape section 42 or the maximum chord length of segmental arc 41 are less than or equal to the non-solder region that cell piece front is in contact with it.
Refering to Fig. 6-Fig. 7, as a specific embodiment of above-described embodiment, the arcuate structure 4 includes: major arc section
42 and two transition circle segmental arcs 43；Wherein, two transition circle segmental arcs 43 are connected to the both ends of the major arc section 42, use
In making the major arc section 42 and the front main grid electrode body 21 or 31 rounding off of back side primary gate electrode ontology.
Specifically, arcuate structure 44 can be made of three sections of arcs, one section is major arc section 42 and two transition circle segmental arcs 43,
In order to enable major arc section 42 and front main grid electrode body 21 or the back side 31 transition of primary gate electrode ontology are round and smooth, to reduce stress,
Two transition circle segmental arcs 43 can be to the center of circle projection of major arc section 42.
With continued reference to Fig. 6 and Fig. 7, the radius of the transition circle segmental arc 43 is less than or equal to the radius of the major arc section 42, and
And the diameter of the major arc section 42 is greater than the width of the front main grid electrode body 21 or the back side primary gate electrode ontology 31
Degree.
Specifically, the diameter of major arc section is greater than front main grid electrode body 21 or the back side primary gate electrode ontology 31
Width can advantageously reduce stress.Non-solder region can be bar-shaped zone, and width can be more than or equal to major arc section 42
Diameter.When actual design, the interface of major arc section 42 and transition circle segmental arc 43 is located at the opening in non-solder region.Transition arc
The width of the radius of section 43, the radius of major arc section 42 and non-solder region can determines according to actual conditions, such as non-solder
The width in region is 1.2cm；The radius of major arc section 42 is 0.6cm, and the radius of transition arc 43 is 0.4cm；Major arc section 42 and mistake
The radius for crossing circular arc 43 is 0.4cm.
With continued reference to Fig. 8-10, in the various embodiments described above, the arcuate structure 44 includes at least one semicircle segmental arc 44.
Specifically, that is to say, that the arcuate structure 4 in front main grid electrode 2 and back side primary gate electrode 3 all has one
Or multiple semicircle segmental arcs 44, when with multiple semicircle segmental arcs 44, the radius of each semicircle segmental arc 44 can it is identical can also be different.
The diameter of semicircle segmental arc 44 can be less than or equal to the width in non-solder region, the opening at semicircle segmental arc 44 both ends and non-solder region
Place is in contact, semicircle segmental arc 44 can part and also all extend in non-solder region.
With continued reference to Fig. 8, as a specific embodiment of above-described embodiment, the arcuate structure 4 includes one and half
Arc section 44 and the diameter of the semicircle segmental arc 44 and the front main grid electrode body 21 or the back side primary gate electrode ontology
31 it is of same size.
Specifically, the diameter of semicircle segmental arc 44 can be less than or equal to the width in non-solder region.In the present embodiment, semicircle
The diameter of segmental arc 44 is less than the width in non-solder region, such as the diameter of semi arch is 0.6cm, and the width in non-solder region is
1.2cm。
With continued reference to Fig. 9 and Figure 10, as a specific embodiment of above-described embodiment, the arcuate structure 4 includes
Multiple semicircle segmental arcs 44 being sequentially connected；Wherein, the diameter summation of each semicircle segmental arc 44 and the front main grid electrode sheet
Body 21 or the back side primary gate electrode ontology 31 it is of same size.
Specifically, the number of semicircle segmental arc 44 can determines according to actual conditions, such as can be 3, each semicircle
The radius of segmental arc 44 can be equal, can not also wait.In order to easy to process, the radius of each semicircle segmental arc 44 is equal.Each semicircle
The diameter summation of segmental arc 44 can be less than or equal to the width in non-solder region, such as the width in non-solder region is 1.2cm, each
The diameter of semicircle segmental arc 44 is 0.2cm.
To in the various embodiments described above with arcuate structure 4 front main grid electrode 2 and back side primary gate electrode 3 respectively carry out
Stress analysis is as follows:
Refering to fig. 11, it illustrates the stress conditions of front main grid electrode, due to stress concentration phenomenon and material section shape
Shape variable quantity is positively correlated, and welding region and non-solder region are about in 45 ° at point C, and the cross sectional shape variable quantity of material is smaller, phase
For meeting area and the perpendicular relationship of non-solder area transition position in the prior art, material section shape change amount is greatly reduced,
The stress alleviated herein is concentrated.In addition, due to the design of arcuate structure 4, so that the contact of welding region and non-solder region
Area is larger, and therefore, faster, the temperature difference in welding region and non-solder region is smaller, and heat expansion is cold for front main grid electrode rate of heat transfer
The deformation quantity of material is smaller in compression process, and thus caused thermal stress is also smaller；The arcuate structure it can be seen from above-mentioned two aspect
4 electrode that medial end portions are of a straight line type compared with the existing technology of front main grid electrode 2, all has in stress collection and in terms of heat transfer
There is biggish advantage, and arcuate structure 4 is also beneficial to going on smoothly for welding process.
Refering to fig. 12 and 13, it illustrates the stress condition of back side primary gate electrode 3 in the prior art, force analysis is as follows
Formula:
FIt is horizontal=FDeformation 2-F1=FDeformation 2-FDeformation 1cosθ ①
FVertically=FDeformation 1*sinθ ②
Due to crack phenomenon and FIt is horizontalIt is related, FDeformation 1、FDeformation 2It is related with the factor of stress concentration, to reduce answering for horizontal direction
Power should reduce θ and edge stress coefficient of concentration.Due to rosin joint and FVerticallyIt is related, formula 2. in, to reduce vertical direction stress,
θ should be reduced, increase the adhesive force between welding and back side primary gate electrode.
Therefore, increase and be spaced apart region 33 along the development length of back side primary gate electrode length direction, can reduce θ angle；It will
The both ends of back side primary gate electrode 3 are set as arcuate structure 4, can reduce the factor of stress concentration.
The both ends of back side primary gate electrode 3 are arranged to arcuate structure 4 it can be seen from above-mentioned two aspect, reduce stress
Be conducive to going on smoothly for welding process simultaneously；Further, increase and be spaced apart 33 length of region, reduce θ angle, can further change
The bad phenomenon of kind crack and rosin joint.
In order to verify the performance of solar battery sheet provided by the invention, cell piece 300 in the present invention, adjustment are selected
Scaling powder spraying and welding position make the primary gate electrode both ends on battery two sides be completely covered and be welded by welding, are lacked by infrared
The crack rate at the cell piece primary gate electrode both ends after falling into tester (EL tester) test welding is 0%.
Under the same welding conditions, tensile test, cell piece front main grid of the invention are carried out to electrode main grid line both ends
The pulling force that electrode both ends can bear is higher by 4N compared with the pulling force that cell piece front main grid electrode both ends can bear in the prior art
Left and right.
To sum up, it in the present invention, by setting arcuate structure for the end of front main grid electrode, is welded when welding with reducing
The stress in region and non-solder region intersection；By setting arcuate structure for the both ends of back side primary gate electrode, to reduce weldering
Connect the stress of space-time open region generation；Stress by alleviating cell piece front main grid electrode and back side primary gate electrode is concentrated existing
As, reduce between different materials because thermal expansion coefficient it is different caused by deformation quantity difference, and then primary gate electrode can be effectively reduced
There is the probability of crack problem in end；The further length for being spaced apart region by increasing the back side, can further improve crack with
The bad phenomenon of rosin joint.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (13)
1. a kind of solar battery sheet characterized by comprising silicon base is arranged in the positive front main grid of the silicon base
Electrode and the back side primary gate electrode that the silicon substrate bottom back side is set；Wherein,
The end of the front main grid electrode is provided with the arcuate structure outwardly protruded；And/or
The both ends of the back side primary gate electrode are in the arcuate structure outwardly protruded.
2. solar battery sheet according to claim 1, which is characterized in that the front main grid electrode includes: positive master
Gate electrode ontology；Wherein,
At least one arc-shaped structure in two ends of the front main grid electrode body.
3. solar battery sheet according to claim 2, which is characterized in that the back side primary gate electrode includes: back side master
Gate electrode ontology；Wherein,
The arc-shaped structure in two ends of the back side primary gate electrode ontology.
4. solar battery sheet according to claim 3, which is characterized in that the arcuate structure has at least one arc
Section, the segmental arc are semi arch, circular arc or elliptic arc.
5. solar battery sheet according to claim 4, which is characterized in that the arcuate structure includes: two segmental arcs
With one rectangular section；Wherein,
Two segmental arcs are connected to rectangular section of the both ends.
6. solar battery sheet according to claim 5, which is characterized in that
Rectangular section of the width is greater than the width of the front main grid electrode body or the back side primary gate electrode ontology；With/
Or
The maximum chord length of the segmental arc is greater than the width of the front main grid electrode body or the back side primary gate electrode ontology.
7. solar battery sheet according to claim 4, which is characterized in that the arcuate structure includes: major arc section and two
A transition circle segmental arc；Wherein,
Two transition circle segmental arcs are connected to the both ends of the major arc section.
8. solar battery sheet according to claim 7, which is characterized in that the radius of the transition circle segmental arc is less than or equal to
The radius of the major arc section, also, the diameter of the major arc section is greater than the front main grid electrode body or the back side main grid
The width of electrode body.
9. solar battery sheet according to claim 4, which is characterized in that the arcuate structure includes a semicircle segmental arc
And the diameter of the semicircle segmental arc and the front main grid electrode body or the back side primary gate electrode ontology is of same size.
10. solar battery sheet according to claim 4, which is characterized in that the arcuate structure includes multiple successively phases
Semicircle segmental arc even；Wherein,
The width of the diameter summation of each semicircle segmental arc and the front main grid electrode body or the back side primary gate electrode ontology
It spends identical.
11. solar battery sheet according to any one of claim 1 to 10, which is characterized in that the front main grid electricity
Extremely multiple, each front main grid electrode at the both ends on the silicon base front along front main grid electrode length direction is arranged
There is arcuate structure, and welding starting point or welding of the arcuate structure of the front main grid electrode in the silicon base are eventually
Point.
12. solar battery sheet according to any one of claim 1 to 10, which is characterized in that the back side main grid electricity
Extend preset length along the both ends of the back side primary gate electrode length direction in the region that is spaced apart of pole.
13. solar battery sheet according to claim 12, which is characterized in that the preset length is 1.0-2.0mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910252806.2A CN110010708A (en) | 2019-03-29 | 2019-03-29 | A kind of solar battery sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910252806.2A CN110010708A (en) | 2019-03-29 | 2019-03-29 | A kind of solar battery sheet |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839861A (en) * | 2014-03-18 | 2014-06-04 | 常州天合光能有限公司 | Multi-overprinting alignment method for solar cell surface fine grid |
| US20170012144A1 (en) * | 2014-03-27 | 2017-01-12 | Kyocera Corporation | Solar cell and solar cell module |
| CN207165582U (en) * | 2017-08-14 | 2018-03-30 | 平煤隆基新能源科技有限公司 | Eight sectional back electrode monocrystaline silicon solar cells |
| CN209691761U (en) * | 2019-03-29 | 2019-11-26 | 泰州隆基乐叶光伏科技有限公司 | A kind of solar battery sheet |
-
2019
- 2019-03-29 CN CN201910252806.2A patent/CN110010708A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839861A (en) * | 2014-03-18 | 2014-06-04 | 常州天合光能有限公司 | Multi-overprinting alignment method for solar cell surface fine grid |
| US20170012144A1 (en) * | 2014-03-27 | 2017-01-12 | Kyocera Corporation | Solar cell and solar cell module |
| CN207165582U (en) * | 2017-08-14 | 2018-03-30 | 平煤隆基新能源科技有限公司 | Eight sectional back electrode monocrystaline silicon solar cells |
| CN209691761U (en) * | 2019-03-29 | 2019-11-26 | 泰州隆基乐叶光伏科技有限公司 | A kind of solar battery sheet |
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