CN104952951B - Solar cell structure, manufacturing method thereof and solar cell module - Google Patents
Solar cell structure, manufacturing method thereof and solar cell module Download PDFInfo
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- CN104952951B CN104952951B CN201410196388.7A CN201410196388A CN104952951B CN 104952951 B CN104952951 B CN 104952951B CN 201410196388 A CN201410196388 A CN 201410196388A CN 104952951 B CN104952951 B CN 104952951B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000004020 conductor Substances 0.000 claims description 40
- 230000005611 electricity Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000007650 screen-printing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005382 thermal cycling Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a solar cell structure, a manufacturing method thereof and a solar cell module. The solar cell structure comprises a substrate, a first electrode and a second electrode. The first electrode is disposed on the first surface of the substrate and includes at least one first bus electrode, a plurality of finger electrodes, and a plurality of first auxiliary electrodes. The first bus electrode intersects the finger electrode and does not intersect the first auxiliary electrode. The second electrode is arranged on the second surface of the substrate and comprises at least one second bus electrode. The second bus electrode comprises a plurality of electrode parts corresponding to the first auxiliary electrode. The electrode parts are arranged at intervals, and the orthographic projection of the electrode parts to the first surface is overlapped with the first bus electrode. The finger electrodes comprise a plurality of first finger electrodes which are intersected with the orthographic projection of the electrode part. Each first auxiliary electrode is positioned beside the orthographic projection of the corresponding electrode part and is intersected with the first finger electrode.
Description
Technical field
The invention relates to a kind of photoelectric conversion devices, and in particular to a kind of solar battery structure and its system
Make method.
Background technology
After solar cell module completes the production, need to usually reliability-test be carried out to it, to ensure the produced sun
Energy battery module can pass through the specification of International Certification and customer requirement.In general, the reliability-test of solar cell module
It is main to include visual inspection (visual inspection), Insulation test, low-light (level) performance test, outdoor exposure test, hot spot
Endurance test, UV test, thermal cycle (thermal cycling) experiment, humidity freeze (humidity freeze) experiment,
Damp and hot (damp heat) experiment, lead end experiment, wet leakage current experiment, mechanical load (mechanical load) experiment, ice
Hail is tested and optical attenuation is tested etc..
However, after thermal cycling test, fill factor (fill factor) decline often occurs for solar cell module
Situation, and then peak power output is caused to reduce.Fig. 1 is please referred to, is to be painted a kind of the upper of conventional solar cell to regard signal
Figure.After analysis is after the solar cell 100 in the solar cell module after thermal cycling test, find to be located at solar cell
The finger electrode 106 of part has breakage on 100 front 102.And the breakage of finger electrode 106 is happened at and solar-electricity
110 position of electrode portion of the bus electrode 108 at 100 back side of pond corresponds to place.Due to the breakage of finger electrode 106 so that these
Finger electrode 106 can not effectively be connect with bus electrode 104, thus electric current collected by finger electrode 106 is caused to can not be successfully
It transmits and is pooled to bus electrode 104, and then the output power of solar cell 100 is caused to decline.
Invention content
Therefore, a purpose of the invention is exactly in a kind of solar battery structure of offer and its manufacturing method and solar-electricity
Pond module, a surface of substrate be equipped with intersect with finger electrode but with the disjoint several auxiliary electrodes of bus electrode, these
Auxiliary electrode is corresponding with the electrode portion of bus electrode on another surface of substrate.Finger electrode rupture and can not be direct by electric current
When conduction is to bus electrode, via the conduction of these auxiliary electrodes, the electric current of finger electrode can be smoothly pooled to confluence electricity
Pole.Therefore, the loss of fill factor can be reduced, and then the energy conversion efficiency of solar cell can be promoted.
It is another object of the present invention in a kind of solar battery structure of offer and its manufacturing method and solar cell mould
Block, it includes the several auxiliary conductors that can be correspondingly connected with bus electrode and auxiliary electrode, therefore can provide further protection, with
When auxiliary electrode can not be successfully the electric current that finger electrode is transmitted reaching bus electrode, electric current is smoothly pooled to confluence electricity
Pole.In addition, auxiliary conductor is wide compared with finger electrode, can promote corresponding between the finger electrode and bus electrode in place of electrode portion
Stability is engaged, and can avoid the bond breakage between finger electrode and bus electrode.
Above-mentioned purpose according to the present invention proposes a kind of solar battery structure.This solar battery structure include substrate,
First electrode and second electrode.Substrate has opposite first surface and second surface.First electrode is set on first surface,
And include at least one first bus electrode, multiple finger electrodes and multiple first auxiliary electrodes, wherein finger electrode and first
Bus electrode intersects, and the first auxiliary electrode and the first bus electrode are non-intersecting.Second electrode be set to second surface on, and include to
Few one second bus electrode.Second bus electrode include multiple electrodes portion corresponding with aforementioned first auxiliary electrode, wherein these
Electrode portion is alternatively arranged along the extending direction of the first bus electrode, orthographic projection and first confluence of each electrode portion to first surface
Electrode is overlapped, and the non-orthographic projection in addition is on extending direction and forms multiple intervals.Include multiple the in aforementioned finger electrode
One finger electrode, these first finger electrodes intersect with the orthographic projection of electrode portion, and every 1 first auxiliary electrode is located at corresponding electricity
By the side of the orthographic projection in pole portion, and the first finger electrode intersection intersected with corresponding orthographic projection.
An embodiment according to the present invention also includes that multiple second finger electrodes are located in interval in above-mentioned finger electrode,
One end of every 1 first auxiliary electrode is stretched in the interval of one end of neighbouring corresponding orthographic projection, and in the interval of institute projection
It is adjacent to the second finger electrode intersection of corresponding orthographic projection.
Another embodiment according to the present invention, the other end of above-mentioned every 1 first auxiliary electrode be stretched on it is neighbouring it is corresponding just
In the interval of the other end of projection, and intersect with the second finger electrode for being adjacent to corresponding orthographic projection in the interval of institute projection.
Another embodiment according to the present invention, above-mentioned first electrode also include corresponding with the first auxiliary electrode multiple first
Auxiliary conductor, and every one first auxiliary conductor connects corresponding first auxiliary electrode and the first bus electrode.
Another embodiment according to the present invention, the width of above-mentioned every 1 first auxiliary conductor are more than the width of each finger electrode
Degree.
Another embodiment according to the present invention, above-mentioned first electrode also include multiple second auxiliary electrodes, wherein these the
Two auxiliary electrodes and the first bus electrode are non-intersecting, and corresponding with the first auxiliary electrode, every 1 second auxiliary electrode with it is corresponding
First auxiliary electrode is located at opposite two sides of the orthographic projection of corresponding electrode portion.
Another embodiment according to the present invention, above-mentioned first electrode also include corresponding with the second auxiliary electrode multiple second
Auxiliary conductor, and every one second auxiliary conductor connects corresponding second auxiliary electrode and the first bus electrode.
Another embodiment according to the present invention, above-mentioned every 1 second auxiliary electrode distinguish position with corresponding first auxiliary electrode
Outside in opposite two edges along extending direction of the orthographic projection of corresponding electrode portion.
Above-mentioned purpose according to the present invention separately proposes a kind of solar cell module.This solar cell module includes one
Upper plate, a lower plate, just like above-mentioned solar battery structure, multiple connect bands and an at least encapsulating material layer.Solar-electricity
Pool structure is set between upper plate and lower plate.Connect band is electrically connected adjacent solar battery structure.Encapsulating material layer is located at upper
Between plate and lower plate, solar battery structure is combined with upper plate and lower plate.
Above-mentioned purpose according to the present invention also proposes a kind of manufacturing method of solar battery structure, comprises the steps of.
A substrate is provided, this substrate has opposite first surface and second surface.A first electrode is formed on first surface, wherein
First electrode includes at least one first bus electrode, multiple finger electrodes and multiple first auxiliary electrodes, these finger electrodes
Intersect with the first bus electrode, and the first auxiliary electrode and the first bus electrode are non-intersecting.A second electrode is formed in the second table
On face, wherein second electrode includes at least one second bus electrode, and the second bus electrode includes multiple electrodes portion and aforementioned first
Auxiliary electrode corresponds to.These electrode portions are alternatively arranged along the extending direction of the first bus electrode, and each electrode portion is to first surface
Orthographic projection it is Chong Die with the first bus electrode, the non-orthographic projection in addition is on extending direction and forms multiple intervals.Finger-like electricity
Include multiple first finger electrodes in extremely, these first finger electrodes intersect with the orthographic projection of electrode portion, every 1 first auxiliary electricity
Pole is located at by the side of the orthographic projection of corresponding electrode portion, and the first finger electrode intersection intersected with corresponding orthographic projection.
The step of embodiment according to the present invention, above-mentioned formation first electrode also includes that above-mentioned finger electrode is made to include more
A second finger electrode, these second finger electrodes are located in the interval of electrode portion, one end projection of every 1 first auxiliary electrode
Refer in the interval of one end of neighbouring corresponding orthographic projection, and with being adjacent to the second of corresponding orthographic projection in the interval of institute projection
Shape electrode intersects.
Another embodiment according to the present invention, the other end of above-mentioned every 1 first auxiliary electrode be stretched on it is neighbouring it is corresponding just
In the interval of the other end of projection, and intersect with the second finger electrode for being adjacent to corresponding orthographic projection in the interval of institute projection.
The step of another embodiment according to the present invention, above-mentioned formation first electrode also includes to make the first electrode include and the
Corresponding multiple first auxiliary conductors of one auxiliary electrode, every 1 first auxiliary conductor connect corresponding first auxiliary electrode and first
Bus electrode.
Another embodiment according to the present invention, the width of above-mentioned every 1 first auxiliary conductor are more than the width of each finger electrode
Degree.
The step of another embodiment according to the present invention, above-mentioned formation first electrode also includes that first electrode is made to include multiple
Second auxiliary electrode, these second auxiliary electrodes and the first bus electrode are non-intersecting, and corresponding with above-mentioned first auxiliary electrode, often
One second auxiliary electrode is located at opposite two sides of the orthographic projection of corresponding electrode portion with corresponding first auxiliary electrode.
The step of another embodiment according to the present invention, above-mentioned formation first electrode also includes to make the first electrode include and the
Corresponding multiple second auxiliary conductors of two auxiliary electrodes, every 1 second auxiliary conductor connect corresponding second auxiliary electrode and first
Bus electrode.
Another embodiment according to the present invention, above-mentioned every 1 second auxiliary electrode distinguish position with corresponding first auxiliary electrode
Outside in opposite two edges along extending direction of the orthographic projection of corresponding electrode portion.
Description of the drawings
For above and other purpose, feature, advantage and the embodiment of the present invention can be clearer and more comprehensible, appended attached drawing is said
It is bright as follows：
Fig. 1 is to be painted a kind of upper schematic diagram of conventional solar cell；
Fig. 2 is the diagrammatic cross-section for being painted a kind of solar cell module according to one embodiment of the present invention；
Fig. 3 is the upper schematic diagram for being painted a kind of solar battery structure according to one embodiment of the present invention；
Fig. 4 is to be painted on the partial enlargement according to a kind of solar battery structure of one embodiment of the present invention to regard signal
Figure；
Fig. 5 is the upper schematic diagram for being painted a kind of solar battery structure according to another embodiment of the present invention；
Fig. 6 is painted on the partial enlargement according to a kind of solar battery structure of another embodiment of the present invention depending on showing
It is intended to；
Fig. 7 is the production flow diagram for being painted a kind of solar battery structure according to one embodiment of the present invention.
Specific implementation mode
Fig. 2 is please referred to, is to be painted to show according to a kind of section of solar cell module of one embodiment of the present invention
It is intended to.In the present embodiment, solar cell module 200 is mainly comprising a upper plate 218, a lower plate 220, several solar-electricities
Pool structure 202a, several connect bands 230 and one or more encapsulating material layers 222.
In some embodiments, upper plate 218 is clear sheet, such as glass.Lower plate 220 can be described as backboard (back again
Sheet), and lower plate 220 can be White-opalescent plank.Solar battery structure 202a be set to upper plate 218 and lower plate 220 it
Between.Connect band 230 is similarly positioned between upper plate 218 and 220, and two ends of each connect band 230 can respectively with adjacent two too
Positive energy battery structure 202a connections, to be electrically connected this two solar battery structure 202a.Connect band 230 is also referred to as welding.
Encapsulating material layer 222 is also between upper plate 218 and lower plate 220.By the program of high-temperature laminating, encapsulating material layer 222 is in molten
These solar battery structures 202a and connect band 230 can be combined with lower plate 220 and upper plate 218 when melting state.In a demonstration example
In son, encapsulating material layer 222 is ethylene-vinyl acetate copolymer (EVA).
It is the one kind being painted respectively according to one embodiment of the present invention referring to Fig. 2 to Fig. 4, wherein Fig. 3 and Fig. 4
The upper schematic diagram of solar battery structure and partial enlargement upper schematic diagram.In some embodiments, solar battery structure
202a includes mainly substrate 204, first electrode 210a and second electrode 214.As shown in Fig. 2, substrate 204 has first surface
206 are located at opposite two sides of substrate 204 with second surface 208 with second surface 208, wherein first surface 206.Substrate
204 material can be semi-conducting material, such as silicon.Substrate 204 according to the position of first electrode 210a and second electrode 214 and
It (is not painted) equipped with corresponding doped region.In an illustrative example, first surface 206 is the front of substrate 204, second surface
208 be the back side of substrate 204.
As shown in figure 3, first electrode 210a is arranged on the first surface 206 of substrate 204.The material of first electrode 210a
Can be metal paste, such as silver paste.In some embodiments, first electrode 210a include one or more first bus electrodes 212,
Several auxiliary electrodes and several finger electrodes.In an illustrative example, as shown in figure 3, first electrode 210a includes three first
Bus electrode 212.Finger electrode includes several first finger electrode 224a and several second finger electrode 224b, these first fingers
Shape electrode 224a and the second finger electrode 224b are substantially wide.First finger electrode 224a and the second finger electrode 224b and first
Bus electrode 212 intersects, i.e. these the first finger electrode 224a and the second finger electrode 224b at least with the first bus electrode 212
Directly engage.In some illustrative examples, each first finger electrode 224a and the confluence electricity of the second finger electrode 224b and first
Pole 212 is orthogonal.In addition, as shown in figure 4, the width 254 of each first finger electrode 224a and the second finger electrode 224b are less than
The width 256 of first bus electrode 212.The electric current of first finger electrode 224a and the second finger electrode 224b can be pooled to first
Bus electrode 212.
In some embodiments, in auxiliary electrode only include several first auxiliary electrode 226a, and each first confluence electricity
212 side of pole is corresponding to configure several first auxiliary electrode 226a.In such embodiments, the first auxiliary electrode 226a can be respectively positioned on
The same side of corresponding first bus electrode 212；Right first auxiliary electrode 226a also non-can be configured in corresponding first confluence
The same side of electrode 212, and it is disposed on opposite two sides of corresponding first bus electrode 212.For example, in first electrode
210a only includes the first auxiliary electrode 226a and first electrode 210a is the first auxiliary electricity in the embodiment made in a manner of wire mark
The screen printing processing that pole 226a can be arranged at corresponding first bus electrode 212 enters knife side.In addition, the first auxiliary electrode 226a is equal
It is non-intersecting with corresponding first bus electrode 212.In some instances, the first auxiliary electrode 226a converges along corresponding first
The extending direction 236 of galvanic electricity pole 212 and extend.In some illustrative examples, the first auxiliary electrode 226a parallel corresponding first
Bus electrode 212.In other illustrative examples, the first auxiliary electrode 226 and corresponding first bus electrode 212 are not parallel.
In further embodiments, as shown in figure 3, including several first auxiliary electrode 226a and several the in auxiliary electrode
Two auxiliary electrode 226b, and the corresponding several first auxiliary electrode 226a of configuration in 212 side of each first bus electrode and several second
Auxiliary electrode 226b.In such embodiments, these first auxiliary electrodes 226a is corresponding with the second auxiliary electrode 226b respectively.
The first auxiliary electrode 226a in correspondence with each other is adjacent to corresponding first bus electrode 212 respectively with the second auxiliary electrode 226b
Opposite two sides.In addition, the first auxiliary electrode 226a and the second auxiliary electrode 226b with the not phase of corresponding first bus electrode 212
It hands over.In some instances, the first auxiliary electrode 226a and the second auxiliary electrode 226b is along the extension of the first bus electrode 212
Direction 236 and extend.In some illustrative examples, the first auxiliary electrode 226a and the second auxiliary electrode 226b are parallel corresponding
First bus electrode 212.In other illustrative examples, the first auxiliary electrode 226a and the second auxiliary electrode 226b and corresponding
First bus electrode 212 is not parallel.It is following that first auxiliary electrode 226a and the second auxiliary electrode are included with first electrode 210a
The embodiment of 226b carries out description of the present embodiment.
As shown in Fig. 2, second electrode 214 is set on the second surface 208 of substrate 204, and distinguish position with first electrode 214
In opposite two sides of substrate 204.The material of second electrode 214 can be metal paste, such as silver paste.Second electrode 214 includes one
Or multiple second bus electrodes 216.In some embodiments, as shown in figure 3, the quantity of the second bus electrode 216 and position are equal
It is corresponded to the first bus electrode 212.Each second bus electrode 216 includes several electrode portions 232.Therefore, each electrode portion 232
The orthographic projection of first surface 206 is overlapped with corresponding first bus electrode 212.In each second bus electrode 216, these
Electrode portion 232 is alternatively arranged along the extending direction 236 of the first bus electrode 212, i.e., each second bus electrode 216 is in discontinuous
Shape.So that the orthographic projection in non-electrode portion 232, which is on the extending direction 236 of the first bus electrode 212, forms interval 234.
In addition, in all finger electrodes of first electrode 210a, the first finger electrode 224a and the second bus electrode 216
Electrode portion 232 on first surface 206 orthographic projection intersection.On the other hand, the second finger electrode 224b then passes through above-mentioned
In 234.Referring to Fig. 3 and Fig. 4, the first auxiliary electrode 226a and the second auxiliary electrode 226b of first electrode 210a is equal
It is corresponding with the electrode portion 232 of the second bus electrode 216 respectively.Also that is, each 232 and 1 first auxiliary electrode 226a of electrode portion and
One second auxiliary electrode 226b is corresponded to, and the first auxiliary electrode 226a is located at corresponding electrode with the second auxiliary electrode 226b
Portion 232 is by opposite two sides of the orthographic projection of first surface 206.In an illustrative example, the first auxiliary electrode 226a and second
Auxiliary electrode 226b is located at the phase along extending direction 236 of orthographic projection of the corresponding electrode portion 232 in first surface 206
To the outside at two edges, i.e. the first auxiliary electrode 226a is with the second auxiliary electrode 226b respectively to corresponding first bus electrode
212 distance is all higher than two edges along extending direction 236 of orthographic projection of the electrode portion 232 in first surface 206 respectively extremely
The distance of corresponding first bus electrode 212.
Referring once again to Fig. 2 and Fig. 4, in some illustrative examples, the first auxiliary electrode 226a and the second auxiliary electrode
226b is located at outside two edges of the connect band 230 being bonded with the first bus electrode 212, i.e. the first auxiliary electrode 226a and
Two auxiliary electrode 226b are all higher than to the distance of corresponding first bus electrode 212 are bonded with the first bus electrode 212 respectively
Distinguish the distance of so far the first bus electrode 212 in two edges of connect band 230.
As shown in figure 4, for each electrode portion 232, be correspondingly arranged at opposite two sides of its orthographic projection first is auxiliary
Help the first finger electrode 224a intersections that electrode 226a and the second auxiliary electrode 226b intersect with this orthographic projection.In some realities
Apply in example, for orthographic projection of each electrode portion 232 on first surface 206, be correspondingly arranged by this orthographic projection
One end 238 of one auxiliary electrode 226a is stretched in the interval 234 of one end of this neighbouring orthographic projection, and with the interval of institute projection
Second finger electrode 224b intersections of this neighbouring orthographic projection in 234.In further embodiments, exist for each electrode portion 232
For orthographic projection on first surface 206, the other end 240 for being correspondingly arranged the first auxiliary electrode 226a by this orthographic projection is prominent
In the interval 234 for stretching in the other end of this neighbouring orthographic projection, and refer to second of this neighbouring orthographic projection in the interval 234 of institute projection
The 224b intersections of shape electrode.That is, the length 248 of the 246 more corresponding electrode portion 232 of length of the first auxiliary electrode 226a
It is long, as shown in Figure 4.
Similar, it is in some embodiments, right for orthographic projection of each electrode portion 232 on first surface 206
One end 242 that the second auxiliary electrode 226b by this orthographic projection should be arranged is stretched on the interval adjacent to one end of this orthographic projection
In 234, and intersect with the second finger electrode 224b of this neighbouring orthographic projection in the interval 234 of institute projection.In other embodiments
In, for orthographic projection of each electrode portion 232 on first surface 206, it is correspondingly arranged second auxiliary by this orthographic projection
Help the other end 244 of electrode 226b to be stretched in the interval 234 of the other end of this neighbouring orthographic projection, and with the interval of institute projection
Second finger electrode 224b intersections of this neighbouring orthographic projection in 234.That is the 250 more corresponding electricity of length of the second auxiliary electrode 226b
The length 248 in pole portion 232 is grown, as shown in Figure 4.
In solar battery structure 202a, when the first finger electrode 224a of first electrode 210a is due to thermal stress influences
Rupture, and then when can not be effectively connected to the first bus electrode 212, be arranged the second bus electrode 216 electrode portion 232 just
The the first auxiliary electrode 226a and the second auxiliary electrode 226b for projecting two sides can smoothly pass the electric current of the first finger electrode 224a
It is directed at the first bus electrode 212.Therefore, fill factor decline is can effectively avoid, and then solar battery structure 202a can be improved
Output power.
It is a kind of solar-electricity being painted respectively according to another embodiment of the present invention referring to Fig. 5 and Fig. 6
The upper schematic diagram of pool structure and partial enlargement upper schematic diagram.The framework of the solar battery structure 202b of present embodiment is big
Identical as the framework of solar battery structure 202a of the above embodiment in cause, the difference of the two is that first electrode 210b is another
Including several auxiliary conductors.
In first electrode 210b only includes the embodiment of the first auxiliary electrode 226a, first electrode 210b additionally comprises several
First auxiliary conductor 228a.These first auxiliary conductors 228a is corresponding with the first auxiliary electrode 226a respectively, and each first auxiliary
The corresponding first auxiliary electrode 226a of assistant director of a film or play's line 228a connections and the first bus electrode 212.In some illustrative examples, such as Fig. 6
Shown, the width 252 of the first auxiliary conductor 228a is more than the width of each first finger electrode 224a and the second finger electrode 224b
Degree 254 so that the engagement between the first auxiliary conductor 228a and the first bus electrode 212 is more solid and reliable, and can promote the
The structural strength of 216 corresponding region one electrode 210b and the second bus electrode reduces the confluences of the first finger electrode 224a and first
The probability of bond breakage between electrode 212.
In first electrode the 210b simultaneously embodiment comprising the first auxiliary electrode 226a and the second auxiliary electrode 226b, such as
Shown in Fig. 5, first electrode 210b also includes several second auxiliary conductor 228b.These second auxiliary conductors 228b is respectively with second
Auxiliary electrode 226b is corresponded to, and the confluence electricity of the corresponding second auxiliary electrode 226b of each second auxiliary conductor 228b connections and first
Pole 212.In some illustrative examples, as shown in fig. 6, the width 258 of the second auxiliary conductor 228b is equally also greater than each first
The width 254 of finger electrode 224a and the second finger electrode 224b, to promote the second auxiliary conductor 228b and the first bus electrode
The solid and reliable degree engaged between 212, and can 216 corresponding region relative increase first electrode 210b and the second bus electrode knot
Structure intensity reduces the probability of bond breakage between the first finger electrode 224a and the first bus electrode 212.
It is a kind of sun being painted according to one embodiment of the present invention please with reference to Fig. 2 to Fig. 4 and Fig. 7, wherein Fig. 7
The production flow diagram of energy battery structure.In the present embodiment, make solar cell when, such as the above embodiment the sun
When energy battery structure 202a, substrate 204 can be first provided, as shown in Figure 2 as described in step 300.Substrate 204 has opposite the
One surface 206 and second surface 208.In addition, substrate 204 is set according to the position of first electrode 210a and second electrode 214
There is corresponding doped region (not being painted).
Next, first electrode 210a can be formed on the first surface 206 of substrate 204 as described in step 302.One
In a little embodiments, first electrode 210a includes one or more first bus electrodes 212, several auxiliary electrodes and several finger-like electricity
Pole.Using such as one or more screen printing processings when forming first electrode 210a, and adopt various print orders.For example, may be used
According to process requirement, and finger electrode is first printed, republishes the first bus electrode 212, then print auxiliary electrode；Or it first prints
First bus electrode 212, republishes finger electrode, then prints auxiliary electrode；Or finger electrode is first printed, republish auxiliary electricity
Then the first bus electrode 212 is printed in pole；Or in the screen printing processing with along with, while printing the first bus electrode 212, referring to
Shape electrode and auxiliary electrode.
Finger electrode includes several first finger electrode 224a and several second finger electrode 224b.First finger electrode
224a intersects with the second finger electrode 224b and the first bus electrode 212.In some embodiments, can only include in auxiliary electrode
Several first auxiliary electrode 226a, and the corresponding several first auxiliary electrode 226a of configuration in 212 side of each first bus electrode.First
Auxiliary electrode 226a is non-intersecting with corresponding first bus electrode 212.In some illustrative examples, the first auxiliary electrode 226a
The screen printing processing that corresponding first bus electrode 212 can be arranged at enters knife side.In addition, the first auxiliary electrode 226a can be along right
The extending direction 236 for the first bus electrode 212 answered and extend.
In further embodiments, as shown in figure 3, including several first auxiliary electrode 226a and several the in auxiliary electrode
Two auxiliary electrode 226b, and the corresponding several first auxiliary electrode 226a of configuration in 212 side of each first bus electrode and several second
Auxiliary electrode 226b.First auxiliary electrode 226a and the second auxiliary electrode 226b in correspondence with each other and be adjacent to respectively the first confluence electricity
Opposite two sides of pole 212.First auxiliary electrode 226a and the second auxiliary electrode 226b and corresponding first bus electrode 212 not
Intersection, and can extend along the extending direction 236 of the first bus electrode 212.
Next, second electrode 214 can be formed on the second surface 208 of substrate 204, such as Fig. 2 as described in step 304
It is shown.In some embodiments, second electrode 214 includes one or more second bus electrodes 216.When forming second electrode 214
Using such as screen printing processing.As shown in figure 3, the quantity of the second bus electrode 216 and position are and the first bus electrode 212 is right
It answers.In addition, each second bus electrode 216 includes several electrode portions 232.Therefore, each electrode portion 232 is to first surface 206
Orthographic projection be overlapped with corresponding first bus electrode 212.The electrode portion 232 of each second bus electrode 216 is along the first confluence
The extending direction 236 of electrode 212 is alternatively arranged, so that the orthographic projection in non-electrode portion 232 is in the first bus electrode 212
There is interval 234 on extending direction 236.
In another embodiment, when forming first electrode 210a with second electrode 214, second electrode can be also initially formed
214 on the second surface 208 of substrate 204, re-forming first electrode 210a on the first surface 206 of substrate 204.
In forming the step of first electrode 210a is with second electrode 214, including making the first finger-like of first electrode 210a
Electrode 224a intersects with orthographic projection of the electrode portion 232 of the second bus electrode 216 of second electrode 214 on first surface 206,
And the second finger electrode 224b is located in above-mentioned interval 234.In addition, as shown in Figure 3 and Figure 4, each electrode portion 232 and one
First auxiliary electrode 226a and one second auxiliary electrode 226b are corresponded to, 226b points of the first auxiliary electrode 226a and the second auxiliary electrode
Not Wei Yu corresponding electrode portion 232 by opposite two sides of the orthographic projection of first surface 206, and the first auxiliary electrode 226a and the
The first finger electrode 224a intersections that two auxiliary electrode 226b intersect with this orthographic projection.
In some embodiments, when making first electrode 210a, make to be correspondingly arranged at by the orthographic projection of each electrode portion 232
One end 238 of the first auxiliary electrode 226a and one end 242 of the second auxiliary electrode 226b be stretched on the one of this neighbouring orthographic projection
In the interval 234 at end, and intersect with the second finger electrode 224b of neighbouring orthographic projection in this interval 234.In other embodiments
In, when making first electrode 210a, more so that being correspondingly arranged at the first auxiliary electrode by the orthographic projection of each electrode portion 232
The other end 244 of the other end 240 of 226a and the second auxiliary electrode 226b are stretched on the interval of the other end of this neighbouring orthographic projection
In 234, and second finger electrode 224b of neighbouring orthographic projection intersects in this interval 234.Also that is, as shown in figure 4, the first auxiliary electricity
The length 248 of the length 246 of pole 226a and the length 250 of the second auxiliary electrode 226b more corresponding electrode portion 232 is grown.
In some embodiments, the first electrode 210b of solar battery structure 202a as shown in figs. 5 and 6 is formed
When, more so that first electrode 210b includes several first auxiliary conductor 228a and the second auxiliary conductor 228b.First auxiliary conductor
228a is corresponding with the first auxiliary electrode 226a respectively, and the second auxiliary conductor 228b is corresponding with the second auxiliary electrode 226b respectively.
First auxiliary conductor 228a is separately connected corresponding first auxiliary electrode 226a and the first bus electrode 212, the second auxiliary conductor
228b is then separately connected corresponding second auxiliary electrode 226b and the first bus electrode 212.In addition, as shown in fig. 6, the first auxiliary
The width 258 of the width 252 of conducting wire 228a and the second auxiliary conductor 228b are all higher than each first finger electrode 224a and second
The width 254 of finger electrode 224b.
By above-mentioned embodiment it is found that the surface that the advantage of the present invention is the substrate of solar battery structure is equipped with
Intersect with finger electrode but with the disjoint several auxiliary electrodes of bus electrode, on these auxiliary electrodes and another surface of substrate
The electrode portion of bus electrode corresponds to.When finger electrode ruptures and electric current can not be directly conducted to bus electrode, via this
The conduction of a little auxiliary electrodes, can smoothly be pooled to bus electrode by the electric current of finger electrode.Therefore, the damage of fill factor can be reduced
It loses, and then the energy conversion efficiency of solar cell can be promoted.
By above-mentioned embodiment it is found that another advantage of the present invention is solar battery structure and solar cell module
Including several auxiliary conductors of bus electrode and auxiliary electrode can be correspondingly connected with, therefore further protection can be provided, with auxiliary
When helping electrode can not be successfully the electric current that finger electrode is transmitted is reached bus electrode, electric current is smoothly pooled to bus electrode.
In addition, auxiliary conductor is wide compared with finger electrode, can promote corresponding to connecing between the finger electrode and bus electrode in place of electrode portion
Stability is closed, and can avoid the bond breakage between finger electrode and bus electrode.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any in this technical field
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore this hair
Bright protection domain is when subject to the scope of which is defined in the appended claims.
Claims (15)
1. a kind of solar battery structure, which is characterized in that include：
One substrate has opposite a first surface and a second surface；
One first electrode is set on the first surface, and includes at least one first bus electrode, multiple finger electrodes and multiple
First auxiliary electrode, wherein the finger electrode is with this, at least one first bus electrode intersects, first auxiliary electrode with should
At least one first bus electrode is non-intersecting；And
One second electrode is set on the second surface, and includes at least one second bus electrode, at least one second bus electrode
Including with the one-to-one multiple electrodes portion of the quantity of first auxiliary electrode and position, wherein the electrode portion along this at least
One extending direction of one first bus electrode is alternatively arranged, and first auxiliary electrode corresponds to the electrode portion and is alternatively arranged,
At least one first bus electrode is Chong Die with this for an orthographic projection of each electrode portion to the first surface, the non-positive throwing in addition
Shadow, which is on the extending direction, forms multiple intervals,
Wherein, include multiple first finger electrodes and multiple second finger electrodes, first finger-like in the finger electrode
Electrode intersects with the orthographic projection, and second finger electrode is located in the interval, and each first auxiliary electrode neighbour sets
In the side of the orthographic projection of the corresponding electrode portion, and the first finger electrode phase intersected with the corresponding orthographic projection
Hand over, the side of each electrode portion be between corresponding first auxiliary electrode and at least one first bus electrode,
One end of each first auxiliary electrode is stretched in the interval of one end of the neighbouring corresponding orthographic projection, and with institute's projection
The interval in be adjacent to the corresponding orthographic projection second finger electrode intersection.
2. solar battery structure according to claim 1, which is characterized in that each first auxiliary electrode it is another
Distal process stretches in the interval of the other end of the neighbouring corresponding orthographic projection, and corresponding with being adjacent in the interval of institute projection
Second finger electrode of the orthographic projection intersects.
3. solar battery structure according to claim 1, which is characterized in that the first electrode also include and described first
Corresponding multiple first auxiliary conductors of auxiliary electrode, and each first auxiliary conductor connects corresponding first auxiliary electrode
With at least one first bus electrode.
4. solar battery structure according to claim 3, which is characterized in that the width of each first auxiliary conductor
More than the width of each finger electrode.
5. solar battery structure according to claim 1, which is characterized in that the first electrode also includes multiple second auxiliary
Help electrode, wherein second auxiliary electrode is with this, at least one first bus electrode is non-intersecting, and with first auxiliary electrode
Corresponding, each second auxiliary electrode is located at the positive throwing of the corresponding electrode portion with corresponding first auxiliary electrode
Opposite two sides of shadow.
6. solar battery structure according to claim 5, which is characterized in that the first electrode also include and described second
Corresponding multiple second auxiliary conductors of auxiliary electrode, and each second auxiliary conductor connects corresponding second auxiliary electrode
With at least one first bus electrode.
7. solar battery structure according to claim 5, which is characterized in that each second auxiliary electrode with it is corresponding
First auxiliary electrode be located at the corresponding electrode portion the orthographic projection opposite two edges along the extending direction
Outside.
8. a kind of solar cell module, which is characterized in that include：
One upper plate；
One lower plate；
The solar battery structure of multiple any one of such as claims 1~7, is set between the upper plate and the lower plate；
Multiple connect bands are electrically connected the adjacent solar battery structure；And
An at least encapsulating material layer by the solar battery structure and the upper plate and is somebody's turn to do between the upper plate and the lower plate
Lower plate combines.
9. a kind of manufacturing method of solar battery structure, which is characterized in that include：
A substrate is provided, which has opposite a first surface and a second surface；
A first electrode is formed on the first surface, wherein the first electrode includes at least one first bus electrode, multiple fingers
Shape electrode and multiple first auxiliary electrodes, at least one first bus electrode intersects the finger electrode with this, and described first
At least one first bus electrode is non-intersecting with this for auxiliary electrode, and first auxiliary electrode is alternatively arranged；And
A second electrode is formed on the second surface, wherein the second electrode includes at least one second bus electrode, this is at least
One second bus electrode includes that the quantity in multiple electrodes portion and first auxiliary electrode and position correspond, the electrode portion
An extending direction along at least one first bus electrode is alternatively arranged, and each electrode portion is just being thrown the one of the first surface
At least one first bus electrode is Chong Die with this for shadow, and the non-orthographic projection, which is on the extending direction, in addition forms multiple intervals,
Wherein, include multiple first finger electrodes and multiple second finger electrodes, first finger-like in the finger electrode
Electrode intersects with the orthographic projection, and second finger electrode is located in the interval, and each first auxiliary electrode neighbour sets
In the side of the orthographic projection of the corresponding electrode portion, and the first finger electrode phase intersected with the corresponding orthographic projection
Hand over, the side of each electrode portion be between corresponding first auxiliary electrode and at least one first bus electrode,
One end of each first auxiliary electrode is stretched in the interval of one end of the neighbouring corresponding orthographic projection, and with institute's projection
The interval in be adjacent to the corresponding orthographic projection second finger electrode intersection.
10. the manufacturing method of solar battery structure according to claim 9, which is characterized in that each described first is auxiliary
Help the other end of electrode to be stretched in the interval of the other end of the neighbouring corresponding orthographic projection, and in the interval of institute projection
It is adjacent to second finger electrode intersection of the corresponding orthographic projection.
11. the manufacturing method of solar battery structure according to claim 9, which is characterized in that form the first electrode
The step of also include that the first electrode is made to include multiple first auxiliary conductors corresponding with first auxiliary electrode, it is each described
First auxiliary conductor connects corresponding first auxiliary electrode and at least one first bus electrode.
12. the manufacturing method of solar battery structure according to claim 11, which is characterized in that each described first is auxiliary
The width of assistant director of a film or play's line is more than the width of each finger electrode.
13. the manufacturing method of solar battery structure according to claim 9, which is characterized in that form the first electrode
The step of also include make the first electrode include multiple second auxiliary electrodes, second auxiliary electrode with this at least one first converge
Galvanic electricity is extremely non-intersecting, and corresponding with first auxiliary electrode, each second auxiliary electrode and corresponding first auxiliary
Electrode is located at opposite two sides of the orthographic projection of the corresponding electrode portion.
14. the manufacturing method of solar battery structure according to claim 13, which is characterized in that form the first electrode
The step of also include that the first electrode is made to include multiple second auxiliary conductors corresponding with second auxiliary electrode, it is each described
Second auxiliary conductor connects corresponding second auxiliary electrode and at least one first bus electrode.
15. the manufacturing method of solar battery structure according to claim 13, which is characterized in that each described second is auxiliary
Help electrode and corresponding first auxiliary electrode be located at the orthographic projection of the corresponding electrode portion along the extending direction
Opposite two edges outside.
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| Application Number | Priority Date | Filing Date | Title |
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| TW103111802A TWI528572B (en) | 2014-03-28 | 2014-03-28 | Solar cell structure, method for manufacturing the same and solar cell module |
| TW103111802 | 2014-03-28 |
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| CN104952951A CN104952951A (en) | 2015-09-30 |
| CN104952951B true CN104952951B (en) | 2018-10-23 |
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| TWI703738B (en) * | 2019-05-14 | 2020-09-01 | 友達光電股份有限公司 | Solar cell |
| US12094991B2 (en) * | 2019-11-13 | 2024-09-17 | Maxeon Solar Pte. Ltd. | Hybrid dense solar cells and interconnects for solar modules and related methods of manufacture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201374341Y (en) * | 2009-04-02 | 2009-12-30 | 常州天合光能有限公司 | Solar cell with metalized electrodes |
| CN202487588U (en) * | 2012-02-24 | 2012-10-10 | 上饶光电高科技有限公司 | Crystalline silicon solar battery with improved back structure |
| CN202633327U (en) * | 2012-07-05 | 2012-12-26 | 宁波尤利卡太阳能科技发展有限公司 | Facade grid line electrode of crystalline silicon solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2012362A1 (en) * | 2006-04-14 | 2009-01-07 | Sharp Kabushiki Kaisha | Solar cell, solar cell string and solar cell module |
| TWM451667U (en) * | 2012-11-06 | 2013-04-21 | Motech Ind Inc | Solar cell and module thereof |
| CN203377219U (en) * | 2013-09-02 | 2014-01-01 | 宁波升日太阳能电源有限公司 | Novel silicon solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201374341Y (en) * | 2009-04-02 | 2009-12-30 | 常州天合光能有限公司 | Solar cell with metalized electrodes |
| CN202487588U (en) * | 2012-02-24 | 2012-10-10 | 上饶光电高科技有限公司 | Crystalline silicon solar battery with improved back structure |
| CN202633327U (en) * | 2012-07-05 | 2012-12-26 | 宁波尤利卡太阳能科技发展有限公司 | Facade grid line electrode of crystalline silicon solar cell |
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| TWI528572B (en) | 2016-04-01 |
| CN104952951A (en) | 2015-09-30 |
| TW201537758A (en) | 2015-10-01 |
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