CN104282774B - Back contact solar cell and module thereof - Google Patents
Back contact solar cell and module thereof Download PDFInfo
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- CN104282774B CN104282774B CN201410043728.2A CN201410043728A CN104282774B CN 104282774 B CN104282774 B CN 104282774B CN 201410043728 A CN201410043728 A CN 201410043728A CN 104282774 B CN104282774 B CN 104282774B
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- 239000000758 substrate Substances 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 16
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000007772 electrode material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000010946 fine silver Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000004904 shortening 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
Abstract
A back contact solar cell module comprises a plurality of back contact solar cells and a bus bar. The back contact solar cell is arranged along a length direction and comprises a solar substrate, three electrode groups and a first connecting electrode. The solar substrate is provided with a backlight surface; the electrode groups are arranged on the backlight surface in a staggered manner along a width direction by different electrical properties, each electrode group comprises a finger bus extending along the length direction and a plurality of finger electrodes intersecting with the finger bus, the finger buses of each electrode group are arranged at intervals by a distance, and the length of the finger electrodes is less than the distance and more than half of the distance. The first connecting electrode is used for connecting the electrode groups of a first electrical property in the plurality of electrode groups. The bus bar is connected with a plurality of back contact solar cells in series along the length direction.
Description
Technical field
The present invention refers in particular to a kind of back contact solar battery and its mould with regard to a kind of solar cell and its module
Block.
Background technology
In recent years due to the rapidly development of science and technology, for the demand of the energy also more increases, but science and technology is rapidly sent out
Exhibition is also damaged to ecological environment, therefore exploitation will not destroy the clear energy sources of ecological environment and become the emphasis of world community
Developing goal, such as wind-force, waterpower, solar energy etc., wherein solar energy are the natural resources for being easiest to obtain, therefore solar-electricity
The development in pond also receives much concern.
In general, solar cell is a kind of photoelectric subassembly engaged by p-type and N-type semiconductor, and in upper table
Face and lower surface are provided with electrode and carry out steering current, after solar cell is subject to the irradiation of sunshine, solar cell meeting
Luminous energy is converted directly into into electric energy.And be the suction for lifting upper surface because the upper surface of solar cell is to receive sunshine
Light area, just has and for Top electrode to move to lower surface, and setting positive and negative electrode is same as grinding for the back contact solar battery of lower surface
Study carefully proposition.
Back contact solar battery is mainly arranged at a positive electrode and a negative electrode too in staggered mode
It is positive can substrate the back side, therefore positive electrode generally requires longer finger electrode to collect produced by solar base plate with negative electrode
Electric current.Fig. 1 is referred to, Fig. 1 shows the floor map of the back contact solar cell of prior art.As illustrated, a back of the body
Contact solar cell 100 includes a solar base plate 1 and multiple finger electrodes 2, and finger electrode 2 is to be alternately arranged on
Solar base plate 1, and finger electrode 2 is the two poles of the earth for being respectively coupled to solar base plate 1, and solar base plate 1 is received into light irradiation
Produced electric current is derived；Wherein, electric current is transferred to finger electrode 2 by solar base plate 1, then is transferred to by finger electrode 2
Bus (bus bar).But electric current is longer by the path that finger electrode 2 is transferred to bus, the collected magnitude of current is bigger, causes
Ohmic power loss (ohmic power loss=I2R it is) also big.To reduce Ohmic power loss, needed for electrode material
Resistance coefficient is needed lower or needs thicker metal level to reduce impedance, but the low electrode material of resistance coefficient (such as fine silver) valency
Lattice are higher, and then material usage is larger for thicker metal level, and then improves production cost.
The content of the invention
Longer finger electrode is needed in view of back contact solar battery of the prior art, but electric current is by finger-like
The path of electrodes transfer to bus is longer, and the collected magnitude of current is bigger, Ohmic power loss (the ohmic power for causing
loss=I2R it is) also big.To reduce Ohmic power loss, the resistance coefficient needed for electrode material needs gold lower or that needs are thicker
Category layer is to reduce impedance, but the low electrode material of resistance coefficient (such as fine silver) price is higher, and thicker metal level then use by material
Amount is larger, and then improves production cost.
Thus, present invention is primarily targeted at providing a kind of back contact solar battery and its module, it is mainly
The shady face of solar base plate is arranged at by least three electrode groups with being staggered, and then shortens electric current passed by finger electrode
Be handed to the path of bus, reduce Ohmic power loss, in addition the present invention also by least one first connection electrodes come electrical ties
Identical electrical electrode group, the collection for making electric current is more uniformly distributed.
The present invention is electric to provide a kind of back contact solar to solve the technical scheme that problem of the prior art is adopted
Pond, it includes a solar base plate, at least three electrode groups and at least one first connection electrode.Solar base plate is with a back of the body
Light face；Electrode group is electrically alternately arranged in shady face with different along a width, and the electrode group is respectively comprising one along one
Perpendicular to the fourchette bus (bus bar) that the length direction of width extends, refer to multiple fourchettes intersected with fourchette bus
With a spacing interval setting between shape electrode (finger), and the fourchette bus of two adjacent electrode groups, and fourchette finger electrode
Length is less than spacing and more than the half of spacing.First connection electrode to connect above-mentioned electrode group in belong to one first electrical
At least two, first is electrically one of positive pole and negative pole.
Compared to prior art, current back contact solar battery needs longer finger electrode, however electric current by
The path that finger electrode is transferred to bus is longer, and the collected magnitude of current is bigger, the Ohmic power loss (ohmic for causing
power loss=I2R it is) also big.For reduce Ohmic power loss, the resistance coefficient needed for electrode material then need it is lower, or
Needs reduce impedance with thicker metal level, but the low electrode material of resistance coefficient (such as fine silver) price is higher, thicker
Then material usage is larger for metal level, and then improves production cost.
Thus, it is with phase by three electrode groups in back contact solar battery provided by the present invention and its module
The different shady face for being electrically alternately arranged in solar base plate, and then shortening electric current is transferred to fourchette bus by fourchette finger electrode
Path, the path of fourchette bus is transferred to by fourchette finger electrode to be shortened by electric current, and effectively reduce ohm
The loss of power, when forming fourchette electrode with the higher material of resistance coefficient by the back contact solar cell in the present invention,
Also identical electric current transmission efficiency can be reached, and then reduces the cost of production.Additionally, identical by the first connection electrode electrical ties
During electrical electrode group, can effectively make what electric current transmitted to be more uniformly distributed.
In a preferred embodiment of the present invention, electrode group includes 2 first fourchette electrode groups and at least one second fourchette electricity
Pole group, the first fourchette electrode group is respectively comprising one first fourchette bus and multiple first fourchette finger electrodes, the first fourchette finger-like electricity
Extended by least side of the first fourchette bus pole；Second fourchette electrode group is located between 2 first fourchette electrode groups, and the
Two fourchette electrode groups include one second fourchette bus and multiple second fourchette finger electrodes, and the second fourchette finger electrode is from second
Fourchette bus extends towards both sides and is staggered with the first fourchette finger electrode.
Wherein, because the second fourchette finger electrode is extended by the second fourchette bus towards both sides, thus can be arranged at
First fourchette finger electrode of both sides is staggered, and need to extend to by a fourchette bus compared to the finger electrode of prior art
Another fourchette bus is bordering on, the present invention makes the second finger by the second fourchette electrode group is arranged between 2 first fourchette electrode groups
Interdigited electrode is staggered with the first fourchette finger electrode, effectively not only can lead in the electric current produced by solar base plate
Draw, can also shorten electric current and conduct via fourchette finger electrode to the conducting path of fourchette bus.
Preferably, in above-mentioned back contact solar battery, the second fourchette electrode of back contact solar battery is
It is multiple, and back contact solar battery also includes one second connection electrode, the second connection electrode is in electrical ties electrode group
Belong to one second electrical at least two, second electrically to be different from the first electrical another in positive pole and negative pole.
As described above, back contact solar battery provided by the present invention, is the need according to series connection when actually used
Ask and two adjacent the first fourchette electrodes or the second fourchette electrode are respectively seen as into different electrical electrode, so that back-contact is too
Positive energy battery can be one another in series with another back contact solar battery.
The present invention also provides a kind of back contact solar electricity to solve the technical scheme that problem of the prior art is adopted
Pond module, it includes multiple back contact solar batteries and at least two convergent belts (Ribbon).Back contact solar electricity
Pond arranges along a length direction, and back contact solar battery respectively comprising a solar base plate, at least three electrode groups and
At least one first connection electrode.Electrode group is electrically alternately arranged in the width direction shady face with different, and electrode group is respectively wrapped
Containing a fourchette bus for extending along its length and multiple fourchette finger electrodes for extending in the width direction, and two adjacent electrode groups
Fourchette bus between have a spacing, and the length of fourchette finger electrode less than spacing and be more than spacing half.First connects
To belong to first electrical at least two in connection electrode group, first is electrically one of positive pole and negative pole to receiving electrode.
Convergent belt is electrically connected along its length adjacent back contact solar battery.Wherein, by the setting of the convergent belt,
Multiple back contact solar batteries can be made to be one another in series.
In a preferred embodiment of the present invention, back contact solar battery module also includes an insulating barrier, insulating barrier
It is arranged between the first connection electrode and convergent belt, to avoid convergent belt from being electrically connected with the electricity of same back contact solar battery
Pole group and cause short circuit.Preferably, the material of insulating barrier is pi.
In a preferred embodiment of the present invention, electrode group includes 2 first fourchette electrode groups and at least one second fourchette
Electrode group.First fourchette electrode group is respectively comprising one first fourchette bus and multiple first fourchette finger electrodes, the first fourchette finger-like
Electrode is extended by least side of the first fourchette bus, and the second fourchette electrode group includes one second fourchette bus and multiple second
Fourchette finger electrode, the second fourchette finger electrode is extended by the both sides of the second fourchette bus and is handed over the first fourchette finger electrode
Mistake arrangement.Preferably, in above-mentioned back contact solar battery module, the second fourchette electrode group is for multiple, and back-contact
Solar cell also includes one second connection electrode, and the second connection electrode is electrical to belong to one second in connection electrode group
At least two, second electrically to be different from the first electrical another in positive pole and negative pole；Further, the second connection electrode
Insulating barrier is additionally provided between convergent belt, additionally, the material of insulating barrier is pi.
Specific embodiment of the present invention, will be further described by below example and accompanying drawing.
Description of the drawings
Fig. 1 shows the floor map of the back contact solar cell of prior art；
Fig. 2 shows the schematic diagram of the back contact solar battery that first embodiment of the invention is provided；
Fig. 3 shows the schematic diagram of the back contact solar battery that second embodiment of the invention is provided；
Fig. 4 shows the schematic diagram of the back contact solar battery that third embodiment of the invention is provided；
Fig. 5 shows the schematic diagram of the back contact solar battery module that fourth embodiment of the invention is provided；
Fig. 6 shows the schematic diagram of the back contact solar battery module that fifth embodiment of the invention is provided；
Fig. 7 shows the schematic diagram of the back contact solar battery module that sixth embodiment of the invention is provided；
Fig. 8 shows the schematic diagram of the back contact solar battery that seventh embodiment of the invention is provided；
Fig. 9 shows the schematic diagram of the back contact solar battery module that eighth embodiment of the invention is provided；And
Figure 10 shows the schematic diagram of the back contact solar battery that ninth embodiment of the invention is provided.
Wherein, description of reference numerals is as follows：
【Symbol description】
100a, 100b, 100c, 100d, 100e back contact solar battery
1a, 1b, 1c, 1d, 1e solar base plate
200a, 200b, 200c, 200d back contact solar battery module
The fourchette bus of 21a, 21b, 21d, 21e first
The fourchette finger electrode of 22a, 22b, 22d, 22e first
The fourchette electrode group of 2a, 2b, 2c, 2d, 2e first
The fourchette bus of 31a, 31b, 31d, 31e second
The fourchette finger electrode of 32a, 32b, 32d, 32e second
The fourchette electrode group of 3a, 3b, 3c, 3d, 3e second
The connection electrode of 41a, 41b, 41c, 41d, 41e first
The connection electrode of 42a, 42b, 42c, 42e second
The connection electrodes of 43d first
The connection electrodes of 44d second
4a, 4b, 4c, 4d convergent belt
5a, 5b, 5c, 5d insulating barrier
D1a, D1b, D1c length direction
D2b widths
FL1, FL2 length
W1, W2, W2 spacing
Specific embodiment
Fig. 2 is referred to, Fig. 2 shows the schematic diagram of the back contact solar battery that first embodiment of the invention is provided.
As shown in Fig. 2 back contact solar battery 100a comprising a solar base plate 1a, 2 first fourchette electrode groups 2a, 2 second
Fourchette electrode group 3a, one first connection electrode 41a and one second connection electrode 42a.
Solar base plate 1a has a shady face (figure is not indicated).2 first fourchette electrode groups 2a are arranged at the two of shady face
Side, and the first fourchette electrode group 2a is respectively comprising one first fourchette bus 21a and multiple first fourchette finger electrode 22a.First refers to
Fork bus 21a extends towards a length direction D1a, and is arranged in backlight along a width D2a vertical with length direction D1a
Face.And the first fourchette finger electrode 22a is inwards extended by the first fourchette bus 21a parallel to width D2a.
Two the second fourchette electrode groups 3a are positioned apart from shady face with spacing W1, and are positioned apart from spacing W1
Between 2 first fourchette electrode groups 2a, and the second fourchette electrode group 3a refers to comprising one second fourchette bus 31a and multiple second
Interdigited electrode 32a.Second fourchette bus 31a extends towards length direction D1a, and in the width direction D2a is arranged in shady face.And
Second fourchette finger electrode 32a is extended towards both sides by the second fourchette bus 31a parallel to width D2a, and the second fourchette refers to
Shape electrode 32a has length FL1, and this length FL1 less than spacing W1 and more than the half of spacing W1, and in the same manner, first refers to
The length (figure is not indicated) of interdigited electrode 22a is similarly less than the second fourchette bus 31a and the spacing of the first fourchette bus 21a
(figure is not indicated)；Because the length of finger electrode (the first fourchette finger electrode 22a or the second fourchette finger electrode 32a) is smaller than
Between between two adjacent fourchette buses (the first fourchette bus 21a and the second fourchette bus 31a, or two second fourchette buses 31a)
Away from, and the length of finger electrode is simultaneously greater than the half of spacing, therefore finger electrode will not touch another fourchette bus, and energy
The finger electrode extended with another bus is staggered.
Wherein, between the second fourchette electrode group 3a and the first fourchette electrode group 2a both arbitrary neighborhoods it is electrical different, meaning
I.e. in the present embodiment, the second fourchette electrode group 3a of the adjacent negative pole of the first fourchette electrode group 2a of e.g. positive pole, and negative pole
The second fourchette electrode group 3a also adjoin positive pole the second fourchette electrode group (be different from element numbers 3a indication the second fourchette electrode
Another second fourchette electrode group of group), the second fourchette electrode group of last positive pole adjoins again the first fourchette electrode group (phase of negative pole
Different from another first fourchette electrode group of element numbers 2a indication the first fourchette electrode group), that is, form positive and negative staggered row
Row；Also, the first fourchette finger electrode 22a and the second fourchette finger electrode 32a are also alternately to arrange.
First fourchette electrode group 2a as above and the second fourchette electrode group 3a, wherein the two of arbitrary neighborhood is electrical
It is different, and the first connection electrode 41a is with the second connection electrode 42a, and in the width direction D2a is arranged at the upper and lower of solar base plate 1a
Both sides, and the first connection electrode 41a connects the first fourchette electrode group 2a wherein to belong to first with the second fourchette electrode group 3a electrical
The electrode group of (such as positive pole, but alternatively negative pole), and the second connection electrode 41a is then to be connected to the first fourchette electrode group 2a and
Two fourchette electrode groups 3a wherein belong to the electrode group with first electrically different second electrically (such as negative pole, but alternatively positive pole).
In sum, compared to existing back contact solar cell it is arranged at too using two the first fourchette electrode groups
The both sides of positive energy substrate shady face due to the back contact solar battery of the present invention are set between 2 first fourchette electrode groups
At least one second fourchette electrode group is put, therefore two adjacent electrode groups can be less than by the length of first/second fourchette finger electrode
Bus spacing and more than two adjacent electrode groups bus spacing half, effectively gradually lack electric current via finger electrode pass
The path of bus is handed to, and then reduces Ohmic power loss (ohmic power loss=I2R), and due to Ohmic power loss
Reduce, therefore the material of electrode can replace resistance with the higher but relatively inexpensive conducting metal of resistance coefficient or conducting resinl
The good metal of electric conductivity such as low but more expensive fine silver of coefficient, and then reduce the production cost of back contact solar battery.
Fig. 3 is referred to, Fig. 3 shows the schematic diagram of the back contact solar battery that first embodiment of the invention is provided.
As illustrated, back contact solar battery 100b comprising a solar base plate 1b, six the first fourchette electrode groups 2b, two the
Two fourchette electrode groups 3b, one first connection electrode 41b and one second connection electrode 42b.
Solar base plate 1b has a shady face, and the first fourchette electrode group 2b is arranged at the backlight of solar base plate 1b
Face, and the first fourchette electrode group 2b is respectively comprising the one the first fourchette buses 21b extended along a length direction D1b, Yi Jiduo
Individual the first fourchette finger electrode extended along a width D2b vertical with length direction D1b by the first fourchette bus 21b
22b；Wherein, the both sides of solar base plate 1b are respectively provided with three the first fourchette electrode groups 2b, and these three first fourchette electrode groups
It is to be arranged at outermost with the first fourchette bus 21b that 2b is arranged at outermost first fourchette electrode group 2b, and makes the first fourchette
Finger electrode 22b inwards extends, and two other the first fourchette electrode group 2b is then, with relative setting, to make two first fingers
First fourchette finger electrode 22b of one of interdigitated electrode group 2b is towards outside and the first fourchette electrode group 2b for being arranged at outside
First fourchette finger electrode 22b is staggered, and another the first fourchette electrode group 2b is then inwards to extend.
2 second fourchette electrode groups 3b are positioned apart from the shady face of solar base plate 1b with spacing W2, and second refers to
Interdigitated electrode group 3b is respectively comprising second fourchette bus 31b and multiple by the second fourchette bus 31b two that along its length D1b extends
Side towards width D2b and width it is oppositely extending go out the second fourchette finger electrode 32b, and the second fourchette finger electrode
One length FL2 of 32b is less than spacing W2 and more than the half of spacing W2；Wherein, 2 second fourchette electrode groups 3b are extended towards
Second fourchette finger electrode 32b is the arrangement that intermeshes, and the second fourchette finger-like that 2 second fourchette electrode groups 3b stretch out
Electrode 32b is then to be staggered with the first fourchette finger electrode 22b respectively.
First fourchette electrode group 2b as above and the second fourchette electrode group 3b, wherein the two of arbitrary neighborhood is electrical
It is different, and the first connection electrode 41b is with the second connection electrode 42b, and in the width direction D2b is arranged at the upper and lower of solar base plate 1b
Belong to first in both sides, and the first connection electrode 42b the first fourchette electrode group 2b of connection and the second fourchette electrode group 3b electrically (such as
Positive pole, but alternatively negative pole) electrode group, and the second connection electrode 42b is then to be connected to the first fourchette electrode group 2b and second
Belong to the electrode group with first electrically different second electrically (such as negative pole, but alternatively positive pole) in fourchette electrode group 3b.
In sum, compared to existing back contact solar cell it is arranged at too using two the first fourchette electrode groups
The both sides of positive energy substrate shady face, because the back contact solar battery 100b of the present invention is in 2 first fourchette electrode groups 2b
Between at least one second fourchette electrode group 3b is set, and the length of first/second fourchette finger electrode 22b, 32b is adjacent less than two
The spacing of bus 21b, 31b of electrode group and more than two adjacent electrode groups bus 21b, 31b spacing half, can effectively gradually
Few electric current is transferred to the path of bus via finger electrode, and then reduces Ohmic power loss (ohmic power loss=
I2R), and because Ohmic power loss is reduced, therefore the material of electrode i.e. can be with the higher but relatively inexpensive conductive gold of resistance coefficient
Category or conducting resinl reduce back contacts replacing resistance coefficient low but the good metal of electric conductivity such as more expensive fine silver
The production cost of formula solar cell.Meanwhile, the present invention back contact solar battery 100b have connection electrode 41b with
42b, respectively to connect identical electrical electrode group, makes detached electrode group originally be cascaded, therefore at least only needs a remittance
Stream band can derive in the electric current of multigroup identical electrical electrode group, and a back contact solar battery at least only needs to two
Convergent belt can derive in the electric current collected by all electrode groups, can reduce the use of convergent belt, and be connected by connection electrode
The technology of identical electrical electrode group, convergent belt need only be connected with one of connected electrode group, thus be able to from
By the distributing position of adjustment convergent belt, also compatible wiring in existing solar energy module sets to make back contact solar battery
Meter.
In other embodiments, the angle between the first fourchette finger electrode of the invention and the first fourchette bus, Yi Ji
Angle between two fourchette finger electrodes and the second fourchette bus, all more than 0 degree and no more than 90 degree, therefore the first fourchette finger-like electricity
Pole and the second fourchette finger electrode can an or angle perpendicular with bus intersect.
Fig. 4 is referred to, Fig. 4 shows the schematic diagram of the back contact solar battery that third embodiment of the invention is provided.
As illustrated, present embodiments providing a back contact solar battery 100c comprising a solar base plate 1c, eight the first fingers
Interdigitated electrode group 2c, two the second fourchette electrode groups 3c, one first connection electrode 41c and one second connection electrodes 42c.In this reality
In applying example, the difference between solar cell 100c and above-mentioned solar cell 100b is only that, solar cell 100c is
It is connected respectively in solar base plate 1c both sides with the second connection electrode 42c with the first connection electrode 41c and is mutually separated with the first fourchette electricity
Two the first fourchette electrode groups 2c of pole group 2c.
Refer to Fig. 2 and Fig. 5, Fig. 5 show the back contact solar battery module that fourth embodiment of the invention is provided
Schematic diagram.Back contact solar battery module 200a (only shows comprising multiple back contact solar battery 100a in figure
Two) and four convergent belt 4a.Along its length D1a's convergent belt 4a electrically connects back contact solar battery 100a.
Wherein, because back contact solar battery 100a is illustrated in above-mentioned first embodiment and Fig. 2, therefore here is not added to go to live in the household of one's in-laws on getting married
Speech.
Additionally, in multiple back contact solar battery modules 200a described in the present embodiment, convergent belt 4a is difference
The first fourchette bus 21a and the second fourchette bus 31a that belong to positive pole are electrically connected in previous back contact solar
Belong to first fourchette bus 21a and the second fourchette bus 31a of negative pole in battery 100a, and convergent belt 4a will also belong to respectively negative
First fourchette bus 21a and the second fourchette bus 31a of pole is electrically connected in latter back contact solar battery 100a
Belong to first fourchette bus 21a and the second fourchette bus 31a of positive pole, so that multiple back contact solar battery 100a are converging
Stream band 4a is together in series, and implies that when multiple back contact solar battery 100a the first fourchette electrode groups 2a and the of one of them
When two fourchette electrode groups 3a are electrically arranged with positive and negative, positive and negative electrode, adjacent back contact solar battery in front and back
100a is electrically arranged with negative, positive, negative, positive electrode, and convergent belt 4a is then to refer to the first fourchette electrode group 2a and second
The electrode group for belonging to positive pole in interdigitated electrode group 3a is linked to respectively in previous back contact solar battery 100a and belongs to negative pole
Electrode group, and after the electrode group for belonging to negative pole in the first fourchette electrode group 2a and the second fourchette electrode group 3a is then linked to respectively
Belong to the electrode group of negative pole in one contact solar battery 100a.However, due to two back contact solar batteries
It is that electrically connecting, and convergent belt 4a is connecting a back contact solar battery 100a's between 100a through convergent belt 4a
During first fourchette electrode group 2a of the second fourchette electrode group 3a and another back contact solar battery 100a, due to the second fourchette
Electrode group 3a is located between 2 first fourchette electrode groups 2a, thus convergent belt 4a can with for the fourchette electrode of electrical ties 2 first
First connection electrode 41a of group 2a overlaps, in order to avoid the first fourchette electrode 2a is connected with the second fourchette electrode 3a through first
The electrical ties of electrode 41a and convergent belt 4a and produce short circuit phenomenon, also insulating barrier 5a is arranged at into the first company in the present embodiment
Between receiving electrode 41a and convergent belt 4a, and then effectively avoid the generation of short circuit phenomenon.
Refer to Fig. 6 and Fig. 7, Fig. 6 show the back contact solar battery module that fifth embodiment of the invention is provided
Schematic diagram；Fig. 7 shows the schematic diagram of the back contact solar battery module that sixth embodiment of the invention is provided.As schemed
Show, each self-contained multiple back contact solar battery 100b, 100c (figures of back contact solar battery module 200b, 200c
In all show two) and six convergent belts 4b, 4c.Convergent belt 4b, 4c difference back-contact of D1b, D1c series connection along its length
Solar cell 100b and back contact solar battery 100c.With the multiple back contacts of convergent belt 4b series connection in the 5th embodiment
The mode of formula solar cell 100b, and in the sixth embodiment with the multiple back contact solar batteries of convergent belt 4c series connection
The mode of 100c, all with the side of above-mentioned multiple back contact solar battery 100a that connected with convergent belt 4a in the fourth embodiment
Formula is identical, is all using convergent belt that the first fourchette bus for belonging to positive pole in back contact solar battery is total with the second fourchette
Line respectively electrical communication belong in previous back contact solar battery negative pole the first fourchette bus it is total with the second fourchette
Line, and will belong in back contact solar battery the first fourchette bus of negative pole and the second fourchette bus difference electrical communication in
Belong to the first fourchette bus and the second fourchette bus of positive pole in latter back contact solar battery.
Please refer to Fig. 3 and Fig. 6, wherein, the back contact solar battery module of Fig. 6 is included and Fig. 3 identicals back of the body
Contact solar battery 100b, and the first connection electrode 41b in back contact solar battery 100b is connected electricity with second
Two insulating barrier 5b are set on the 42b of pole, electrically to connect different back contact solar battery 100b's respectively in convergent belt 4b
When the first fourchette bus 21b and the second fourchette bus 31b, using being located relatively at the first connection electrode 41b (or the second connection electrode
Insulating barrier 5b incoming call sexual isolations 42b) and between convergent belt 4b, it is to avoid the first fourchette bus 21b (or second fourchette bus 31b)
Through the first connection electrode 41b (or second connection electrode 42b) and convergent belt 4b, short circuit links the same back-contact sun
Second fourchette bus 31b (or first fourchette bus 21b) of energy battery 100b；And the back contact solar battery module of Fig. 7
200c is adopted and Fig. 4 identical back contact solar battery 100c, and in first connection electrode of solar cell 100c
41c, the second connection electrode 42c, and upper and lower both sides are equivalent to the first connection electrode 41b and the second connection electrode shown in Fig. 3
Four insulating barrier 5c are set on 42b, make to be insulated between aforementioned connection electrode and convergent belt 4c, the insulation in the present embodiment
Layer 5b and 5c are pi (polyimide), but not limited to this；Therefore, by the setting of insulating barrier 5b, 5c, can be effective
The the first fourchette electrode group/the second fourchette electrode group for preventing from belonging to positive pole in back contact solar battery module pass through
Convergent belt is contacted with each other with the second fourchette electrode group/the first fourchette electrode group for belonging to negative pole and causes short circuit.In other enforcements
In example, the insulating barrier can also be only arranged at the upper of the region of convergent belt covering connection electrode, and connection electrode is not by convergent belt
The part for being covered need not then arrange the insulating barrier.
Refer to Fig. 8 and Fig. 9, Fig. 8 show showing for the back contact solar battery that seventh embodiment of the invention is provided
It is intended to；Fig. 9 shows the schematic diagram of the back contact solar battery module that eighth embodiment of the invention is provided.As illustrated,
Back contact solar battery module 200d comprising multiple back contact solar battery 100d (two are only shown in figure) and
Multiple convergent belt 4d (is only shown in figure)；Wherein, back contact solar battery 100d comprising a solar base plate 1d, two
First fourchette electrode group 2d, one second fourchette electrode group 3d and one first connection electrode 41d.
Solar base plate 1d has a shady face (figure is not indicated).2 first fourchette electrode groups 2d are arranged at the two of shady face
Side, and the first fourchette electrode group 2d is respectively comprising one first fourchette bus 21d and multiple first fourchette finger electrode 22d, and first
Fourchette finger electrode 22d is extended by the side of the first fourchette bus 21d.Second fourchette electrode group 3d is arranged at shady face, and
Between 2 first fourchette electrode groups 2d, and the second fourchette electrode group 3d includes one second fourchette bus 31d and multiple second
Fourchette finger electrode 32d, and the second fourchette finger electrode 32d is extended by the both sides of the second fourchette bus 31d, and the second fourchette
Finger electrode 32d is staggered respectively with the first fourchette finger electrode 22d of the left and right sides.First connection electrode 41d electrically connects
Connect 2 first fourchette electrode groups 2d.Wherein, both arbitrary neighborhoods between the second fourchette electrode group 3d and the first fourchette electrode group 2d
It is electrical different, imply that in the present embodiment, e.g. the second fourchette electricity of the adjacent negative pole of the first fourchette electrode group 2d of positive pole
Pole group 3d, and the first fourchette electrode group that the second fourchette electrode group 3d of negative pole also adjoins positive pole (is different from element numbers 2d institute
Refer to another first fourchette electrode group of the first fourchette electrode group), that is, being staggered for positive negative and positive is formed, but it is not limited to this.
Convergent belt 4d is linked to the second connection electrode of the first connection electrode 43d comprising one first connection electrode 43d and two
44d.First connection electrode 43d is the second fourchette electrode group 3d for being connected to a back contact solar battery 100d.Second connects
Receiving electrode 44d is connected to 2 first fourchette electrode groups 2d of another back contact solar battery 100d, makes multiple back-contacts
Series connection is formed between solar cell 100d.
Figure 10 is referred to, Figure 10 shows the signal of the back contact solar battery that ninth embodiment of the invention is provided
Figure.As illustrated, back contact solar battery 100e comprising a solar base plate 1e, 2 first fourchette electrode groups 2e, 2 the
Two fourchette electrode groups 3e, the first connection electrode 41e and the second connection electrode 42e.
Solar base plate 1e has a shady face.2 first fourchette electrode groups 2e are arranged at the both sides of shady face, and first
Fourchette electrode group 2e is respectively comprising one first fourchette bus 21e and multiple first fourchette finger electrode 22e, and the first fourchette finger-like is electric
Pole 22e is extended by the both sides of the first fourchette bus 21e.Second fourchette electrode group 3e is arranged at shady face, and positioned at 2 first
Between fourchette electrode group 2e, and the second fourchette electrode group 3e is comprising one second fourchette bus 31e and multiple second fourchette finger-like electricity
Pole 32e, and the second fourchette finger electrode 32e is extended by the both sides of the second fourchette bus 31e.
Wherein, between the second fourchette electrode group 3e and the first fourchette electrode group 2e both arbitrary neighborhoods it is electrical different, meaning
I.e. in the present embodiment, the second fourchette electrode group 3e of the adjacent negative pole of the first fourchette electrode group 2e of e.g. positive pole, and negative pole
The second fourchette electrode group 3e also adjoin positive pole the second fourchette electrode group (be different from element numbers 3e indication the second fourchette electrode
Another second fourchette electrode group of group), the second fourchette electrode group of last positive pole adjoins again the first fourchette electrode group (phase of negative pole
Different from another first fourchette electrode group of element numbers 2e indication the first fourchette electrode group), that is, form positive and negative staggered row
Row；Also, it is alternately to arrange between the first adjacent fourchette finger electrode 22e and the second fourchette finger electrode 32e.As above institute
State, because the present invention is also electrically connected multiple back contact solar batteries with convergent belt back contact solar electricity is formed
Pond module, and when convergent belt and first/second fourchette electrode group overlap also using insulating barrier be arranged on convergent belt and first/
Between the second fourchette electrode group, to avoid producing the phenomenon of short circuit.
In other embodiments of the invention, back contact solar battery may also comprise four with different electrical friendship
The electrode group of mistake arrangement, wherein these electrode groups are arranged in positive pole-negative pole-positive pole-negative pole mode, or negative pole-positive pole-negative pole-
Positive pole mode is arranged, i.e., at least one second fourchette electrode group is arranged between 2 first fourchette electrode groups, and at least one connection
Electrode is to connect two identical electrical electrode groups.It will be understood that to more than having when back contact solar battery it is different electrically
Staggered electrode group when, still at least have one second fourchette electrode group and be arranged between 2 first fourchette electrode groups,
And an at least connection electrode is to connect two identical electrical electrode groups.
Value by the above-mentioned embodiment of the present invention, in the true tool industry of the present invention.But the embodiment of the above
Illustrate, only presently preferred embodiments of the present invention explanation, such as skilled artisan ought be according to the above-mentioned of the present invention
Embodiment is illustrated and makees other a variety of improvement and change.But these a variety of improvement for being made according to embodiment of the present invention and change
Change, when in the inventive concept and the scope of the claims for defining for still falling within the present invention.
Claims (10)
1. a kind of back contact solar battery, comprising：
One solar base plate, with a shady face；
At least three electrode groups, the electrode group is electrically alternately arranged in the shady face along a width with different, and
The electrode group respectively comprising along one perpendicular to the width length direction extend a fourchette bus, with it is multiple with it is described
The intersecting fourchette finger electrode of fourchette bus, it is with a spacing interval setting between the fourchette bus of the electrode group and described
, less than the spacing and more than the half of the spacing, the fourchette finger electrode is in the width direction for the length of fourchette finger electrode
Extend；And
At least one first connection electrode, is arranged in the width direction the solar cell substrate, is for electrically connecting to the electricity
Belong to one first electrical at least two in the group of pole, described first is electrically one of positive pole and negative pole.
2. back contact solar battery as claimed in claim 1, it is characterised in that the electrode group is respectively included：
2 first fourchette electrode groups, respectively include：
One first fourchette bus；And
Multiple first fourchette finger electrodes, are extended by least side of the first fourchette bus；And
At least one second fourchette electrode group, between described 2 first fourchette electrode groups, and the second fourchette electrode group bag
Contain：
One second fourchette bus, is positioned apart from total in first fourchette of described 2 first fourchette electrode groups with the spacing
Between line；And
Multiple second fourchette finger electrodes, extend from least side of the second fourchette bus and with the first fourchette finger-like
Electrode is staggered.
3. back contact solar battery as claimed in claim 2, it is characterised in that the second fourchette electrode group is many
It is individual, and the back contact solar battery also includes one second connection electrode, second connection electrode is described to connect
Belong to one second electrical at least two in electrode group, described second is electrically electric to be different from described first in positive pole and negative pole
Property another.
4. a kind of back contact solar battery module, comprising：
Multiple back contact solar batteries, along length direction arrangement, the back contact solar battery is included：
One solar base plate, with a shady face；
At least three electrode groups, the electrode group with it is different electrically along one perpendicular to the length direction width alternately
The shady face, and the electrode group are arranged in respectively comprising a fourchette bus extended along the length direction, with multiple and institute
The intersecting fourchette finger electrode of fourchette bus is stated, it is described with a spacing interval setting between the fourchette bus of the electrode group
, less than the spacing and more than the half of the spacing, the fourchette finger electrode is in the width direction for the length of fourchette finger electrode
Extend；And
At least one first connection electrode, is arranged in the width direction the solar cell substrate, to connect the electrode group
In belong to one first electrical at least two, described first is electrically one of positive pole and negative pole；And
An at least convergent belt, electrically connects the back contact solar battery along the length direction.
5. back contact solar battery module as claimed in claim 4, it is characterised in that described also comprising an insulating barrier
Insulating barrier is arranged between first connection electrode and the convergent belt.
6. back contact solar battery module as claimed in claim 5, it is characterised in that the material of the insulating barrier is poly-
Sub- acid amides.
7. back contact solar battery module as claimed in claim 4, it is characterised in that the electrode group is included：
2 first fourchette electrode groups, respectively include：
One first fourchette bus；And
Multiple first fourchette finger electrodes, are extended by least side of the first fourchette bus；And
At least one second fourchette electrode group, between described 2 first fourchette electrode groups, and the second fourchette electrode group bag
Contain：
One second fourchette bus, is positioned apart from total in first fourchette of described 2 first fourchette electrode groups with the spacing
Between line；And
Multiple second fourchette finger electrodes, extend from least side of the second fourchette bus and with the first fourchette finger-like
Electrode is staggered.
8. back contact solar battery module as claimed in claim 7, it is characterised in that the second fourchette electrode group is
It is multiple, and the back contact solar battery also includes one second connection electrode, second connection electrode is electrically to connect
Connect and belong to one second electrical at least two in the electrode group, described second is electrically described to be different from positive pole and negative pole
First electrical another.
9. back contact solar battery module as claimed in claim 8, it is characterised in that described also comprising an insulating barrier
Insulating barrier is arranged between second connection electrode and the convergent belt.
10. back contact solar battery module as claimed in claim 9, it is characterised in that the material of the insulating barrier is
Pi.
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| Application Number | Priority Date | Filing Date | Title |
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| TW102123883A TWI620334B (en) | 2013-07-03 | 2013-07-03 | Back contact solar cell and module thereof |
| TW102123883 | 2013-07-03 |
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| TWI560892B (en) * | 2015-08-12 | 2016-12-01 | Motech Ind Inc | Solar cell |
| KR102622744B1 (en) * | 2019-01-08 | 2024-01-09 | 상라오 신위안 웨동 테크놀러지 디벨롭먼트 컴퍼니, 리미티드 | Solar cell and solar cell panel including the same |
| CN113707737A (en) * | 2021-07-22 | 2021-11-26 | 深圳市科纳能薄膜科技有限公司 | Solar cell and manufacturing method thereof |
| CN117253929B (en) * | 2023-11-16 | 2024-04-09 | 隆基绿能科技股份有限公司 | Back contact battery and manufacturing method thereof |
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| CN102077361A (en) * | 2008-07-02 | 2011-05-25 | 夏普株式会社 | Solar battery module and method for manufacturing the same |
| CN102790110A (en) * | 2011-05-18 | 2012-11-21 | Lg电子株式会社 | Solar cell module |
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| US6274402B1 (en) * | 1999-12-30 | 2001-08-14 | Sunpower Corporation | Method of fabricating a silicon solar cell |
| GB2442254A (en) * | 2006-09-29 | 2008-04-02 | Renewable Energy Corp Asa | Back contacted solar cell |
| WO2008080160A1 (en) * | 2006-12-22 | 2008-07-03 | Advent Solar, Inc. | Interconnect technologies for back contact solar cells and modules |
| JP5174817B2 (en) * | 2007-07-30 | 2013-04-03 | 京セラ株式会社 | Solar cell module |
| JP4875124B2 (en) * | 2009-09-17 | 2012-02-15 | シャープ株式会社 | Solar cell module |
| TWM446414U (en) * | 2010-10-19 | 2013-02-01 | Unistars | Package board |
| US8486746B2 (en) * | 2011-03-29 | 2013-07-16 | Sunpower Corporation | Thin silicon solar cell and method of manufacture |
| TWI458104B (en) * | 2011-09-14 | 2014-10-21 | Au Optronics Corp | Solar cell module |
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| CN102077361A (en) * | 2008-07-02 | 2011-05-25 | 夏普株式会社 | Solar battery module and method for manufacturing the same |
| CN102790110A (en) * | 2011-05-18 | 2012-11-21 | Lg电子株式会社 | Solar cell module |
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Effective date of registration: 20191128 Address after: Hsinchu City, Taiwan, China Patentee after: United Renewable Energy Co., Ltd. Address before: Hsinchu City, Taiwan, China Patentee before: Neo Solar Power Corporation |