CN206697490U - The backplate and battery of p-type PERC double-sided solar batteries - Google Patents
The backplate and battery of p-type PERC double-sided solar batteries Download PDFInfo
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- CN206697490U CN206697490U CN201720203401.6U CN201720203401U CN206697490U CN 206697490 U CN206697490 U CN 206697490U CN 201720203401 U CN201720203401 U CN 201720203401U CN 206697490 U CN206697490 U CN 206697490U
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- main grid
- alum gate
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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
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- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/547—Monocrystalline silicon PV cells
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Abstract
The utility model discloses a kind of backplate of p-type PERC double-sided solar batteries, including at least 2 silver-colored main grids of the back of the body and 25 500 alum gate lines being parallel to each other being parallel to each other, the alum gate line is with carrying on the back silver-colored main grid vertical connection；The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, and the silver-colored main grid of the back of the body is connected by the back of the body silver slotted zones opened up in silicon chip back side with P-type silicon；Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.The invention also discloses a kind of p-type PERC double-sided solar batteries.Using the utility model, electric current export ability is strong, simple in construction, easy industrialization, while improves the photoelectric transformation efficiency of battery.
Description
Technical field
It the utility model is related to area of solar cell, more particularly to a kind of back side of p-type PERC double-sided solar batteries
Electrode, correspondingly, the utility model further relate to a kind of p-type PERC double-sided solar batteries.
Background technology
Solar cell power generation is that solar energy is converted into electric energy using solar cell, because it is green ring
Product is protected, environmental pollution will not be caused, and is renewable resource, so in the case of current energy shortage, solar-electricity
Pond is a kind of novel energy for having broad based growth future.
During electric energy is converted light energy into, photo-generated carrier caused by its inside needs to pass through solar battery sheet
The electrode of outside printing is collected and drawn, and is then connected with external circuit, so as to which electric current be transported out.Above-mentioned silk-screen printing
Process is further subdivided into the back of the body silver main grid printing of solar cell, the secondary grid printing of back of the body silver and positive electrode printing.Positive electrode is starched
Material and back electrode slurry are printed on crystal silicon solar battery on the front and back, through oversintering, play a part of collected current.It is existing
Technology in, backplate is made up of silver-colored main grid and Al-BSF, back electrode directly and P-type silicon contact, but be used for PERC it is two-sided
During solar cell, because PERC is overleaf provided with the passivating film of insulation, transmission electricity is difficult to using existing backplate
The purpose of stream, it is therefore desirable to a kind of new backplate is provided and is applicable to PERC double-sided solar batteries.
The content of the invention
Technical problem to be solved in the utility model is, there is provided a kind of back side of p-type PERC double-sided solar batteries
Electrode, electric current export ability is strong, simple in construction, easy industrialization, while improves the photoelectric transformation efficiency of battery.
Technical problem to be solved in the utility model is, there is provided a kind of p-type PERC double-sided solar batteries, can be two-sided
Sunshine is absorbed, electric current export ability is strong, simple in construction, easy industrialization, while improves the photoelectric transformation efficiency of component.
In order to solve the above-mentioned technical problem, the utility model provides a kind of back side of p-type PERC double-sided solar batteries
Electrode includes the alum gate line that at least 2 silver-colored main grids of the back of the body being parallel to each other and 25-500 bars are parallel to each other, the alum gate line and back of the body silver
Main grid vertical connection；
The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, and the silver-colored main grid of the back of the body passes through
It is connected in the back of the body silver slotted zones that silicon chip back side opens up with P-type silicon；
Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；
At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, the silver-colored slotted zones of the back of the body
The silver-colored slotted unit of interior at least two back of the body, carry on the back and be arranged in parallel between silver-colored slotted unit.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, two neighboring back of the body silver is opened
Spacing between groove unit is equal, and spacing is 10-4880 μm.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, two neighboring back of the body silver is opened
Spacing between groove unit is unequal, and spacing is 10-4880 μm.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, the back of the body silver fluting is single
The width of member is 10-5000 μm.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, the silver-colored main grid of the back of the body
Width is 0.5-5mm.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, the silver-colored main grid of the back of the body
Bar number is 2-8 bars.
As the optimal technical scheme of the backplate of the p-type PERC double-sided solar batteries, the silver-colored main grid point of every back of the body
Into 2-20 sections, the spacing between adjacent two sections is 10-50mm.
Correspondingly, the utility model also provides a kind of p-type PERC double-sided solar batteries, the two-sided sun of p-type PERC
Energy battery includes the backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type emitter stage, front side silicon nitride film
With positive silver electrode；The backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type emitter stage, front side silicon nitride silicon
Film and positive silver electrode stack gradually connection from bottom to up；
The backplate includes the alum gate line that at least 2 silver-colored main grids of the back of the body being parallel to each other and 25-500 bars are parallel to each other,
The alum gate line is with carrying on the back silver-colored main grid vertical connection；
The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, alum gate slotted zones and alum gate
Line is in the same direction, and the silver-colored main grid of the back of the body is connected by the back of the body silver slotted zones opened up in silicon chip back side with P-type silicon；
Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；
At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.
Correspondingly, the utility model also provides a kind of p-type PERC double-sided solar batteries, it is characterised in that the p-type
PERC double-sided solar batteries include the backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type emitter stage,
Front side silicon nitride film and positive silver electrode；The backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type transmitting
Pole, front side silicon nitride film and positive silver electrode stack gradually connection from bottom to up；
The backplate includes the alum gate line that at least 2 silver-colored main grids of the back of the body being parallel to each other and 25-500 bars are parallel to each other,
The alum gate line is with carrying on the back silver-colored main grid vertical connection；
The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, alum gate slotted zones and alum gate
Line is vertical, and the silver-colored main grid of the back of the body is connected by the back of the body silver slotted zones opened up in silicon chip back side with P-type silicon；
Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；
At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.
Implement the utility model embodiment, have the advantages that：
The backplate of p-type PERC double-sided solar batteries described in the utility model, the existing one side sun can be both substituted
The effect of full aluminum back electric field, the also function with current－carrying conductor in energy battery structure, suitable for being installed in the two-sided sun of p-type PERC
The back side of energy battery is as backplate.Alum gate line and the silver-colored main grid of the back of the body are all connected by slotted zones with P-type silicon, the electricity of backplate
Conductance output capacity is further lifted.The structure of backplate is simple, easy industrialization, while improves the opto-electronic conversion effect of battery
Rate.Silver paste and the dosage of aluminium paste can be saved using the p-type PERC double-sided solar batteries of backplate described in the utility model, dropped
Low production cost, and two-sided absorption luminous energy is realized, it is significantly expanded the application of solar cell and improves opto-electronic conversion effect
Rate.
Brief description of the drawings
Fig. 1 is a kind of structural representation of p-type PERC double-sided solar battery backplates of the utility model；
Fig. 2 is that a kind of structure in the lbg area of p-type PERC double-sided solar battery backplates of the utility model is shown
It is intended to；
Fig. 3 is a kind of another knot in the lbg area of p-type PERC double-sided solar battery backplates of the utility model
Structure schematic diagram；
Fig. 4 is a kind of structural representation of p-type PERC double-sided solar batteries of the utility model；
Fig. 5 is the structural representation of the utility model another kind p-type PERC double-sided solar batteries；
Fig. 6 is a kind of structural representations in the lbg area of p-type PERC double-sided solar battery backplates of Fig. 5.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type is described in further detail.
In recent years, with the further investigation of scientist and technical staff, it was found that a kind of PERC solar energy of passivating back
Battery can further improve the photoelectric transformation efficiency of battery.But the pellumina of cell backside and silicon nitride film are all insulation
Film, it is impossible to electronics is transferred out to come, therefore conventional way is the passivating film fluting below grid line, and when printing grid line, silver paste
It can be filled into slotted zones and form Ohmic contact with P-type silicon, so as to realize conducting function.
Existing PERC one sides solar cell is provided with the whole back of the body that full aluminum back electric field is covered in silicon chip at the back side of battery
Face, the effect of full aluminum back electric field are to improve open-circuit voltage Voc and short circuit current Jsc, force minority carrier away from surface, few
Number Carrier recombination rate reduces, so as to improve battery efficiency on the whole.However, because full aluminum back electric field is light tight, therefore, have
The rear surface of solar cell of full aluminum back electric field can not absorb luminous energy, positive can only absorb luminous energy, its photoelectric transformation efficiency is difficult to greatly
The raising of amplitude.
Therefore, the utility model proposes a kind of new backplate, existing one side solar battery structure can have both been substituted
In full aluminum back electric field effect, the also function with current－carrying conductor, the back of the body suitable for being installed in p-type PERC double-sided solar batteries
Face is as backplate.
As Figure 1-3, the utility model provides a kind of backplate of p-type PERC double-sided solar batteries, including extremely
The alum gate line 2 that the few 2 silver-colored main grids 1 of the back of the body being parallel to each other and 25-500 bars are parallel to each other, the alum gate line 2 hang down with carrying on the back silver-colored main grid 1
It is direct-connected to connect；
The alum gate line 2 is connected by the alum gate slotted zones 9 opened up in silicon chip back side with P-type silicon 5, the silver-colored main grid 1 of the back of the body
It is connected by the back of the body silver slotted zones 10 opened up in silicon chip back side with P-type silicon 5；
Every silver-colored main grid 1 of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid 1 of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body
10；
At least one silver-colored slotted unit 11 of the back of the body in the silver-colored slotted zones 10 of the back of the body, it is rectangle to carry on the back the silver-colored pattern of slotted unit 11.
Backplate described in the utility model sets the back side of silicon chip, and in order to suitable for double-sided solar battery, realize
The back side can absorb sunshine, no longer set full aluminum back electric field, but be changed to set the alum gate line 2 of many bars, using lbg
Technology overleaf opens up lbg area in silicon nitride film 3 and backside oxide aluminium film 4, and lbg divides into the silver-colored slotted zones 10 of the back of the body
With alum gate slotted zones 9, back silver paste is printed on the silver-colored slotted zones 10 of the back of the body, and the back of the body silver main grid 1 formed after sintering is by carrying on the back silver fluting
Area 10 is connected with P-type silicon 5；Aluminium paste is printed on alum gate slotted zones 9, and the alum gate line 2 formed after sintering passes through alum gate slotted zones 9 and P
Type silicon 5 connects.The silver-colored main grid 1 of the back of the body intersected with alum gate line 2 collects the electronics on alum gate line 2 and directly transfers out from P-type silicon
Electronics so that the current output capability of whole backplate gets a promotion.
Alum gate line 2 substitutes full aluminum back electric field to play raising open-circuit voltage Voc and short circuit current Jsc, reduces minority carrier
Sub- recombination rate, improve the effect of cell photoelectric conversion efficiency；The dense distribution of 25-500 bar alum gates line 2 passes through alum gate on silicon chip
Slotted zones 9 form localized contact with P-type silicon 5, in time can come out the electron transport of silicon chip everywhere；And alum gate line 2 is not
The back side of silicon chip is covered comprehensively, and sunshine can be projected in silicon chip from the sensitive area between alum gate line 2, so as to realize silicon chip back side
Luminous energy is absorbed, greatly improves the photoelectric transformation efficiency of battery.
Preferably, the radical of the alum gate line 2 is 30-350 bars, and more preferably, the radical of the alum gate line 2 is 50-300
Bar.
In general, the width of alum gate line 2 is 30-500 μm, and the width of alum gate slotted zones 9 is smaller, therefore for the back side
Silicon nitride film 3 and the damage area of backside oxide aluminium film 4 are small, and degree of injury is low.But the width for carrying on the back silver-colored main grid 1 reaches 0.5-
5mm, far it is wider than the width of alum gate line 2, carry on the back the silver-colored area of slotted zones 10 causes the passivation area at the back side to reduce as crossed senior general, it is impossible to most
The compound of the few son in the back side is reduced to big degree, restricts the lifting of photoelectric transformation efficiency, it is too small to carry on the back the silver-colored area of slotted zones 10, can lead again
The back of the body silver electrode paste that cause contacts with P-type silicon is less, influences the output of electric current.
Therefore, the utility model people passes through multiple contrast experiment, it is total to carrying on the back the back of the body silver slotted unit 11 in silver-colored slotted zones 10
Area and arrangement are designed, and at least one silver-colored slotted unit 11 of the back of the body is provided with the silver-colored slotted zones 10 of the back of the body, carries on the back silver-colored slotted unit
11 patterns are rectangle.
When being provided with a silver-colored slotted unit 11 of the back of the body in the silver-colored slotted zones 10 of the back of the body, as shown in Fig. 2 carrying on the back silver-colored slotted unit 11
Located at carrying on the back among silver-colored slotted zones 10, the width of the silver-colored slotted unit 11 of the back of the body is 10-5000 μm, it is preferable that the back of the body silver fluting
The width of unit 11 is 200-5000 μm.The length of the silver-colored slotted unit 11 of the back of the body is identical with the length for carrying on the back silver-colored main grid 1, can also
It is that short 5-5000 μm of the silver-colored slotted unit 11 of back of the body main grid 1 more silver-colored than the back of the body or the silver-colored slotted unit 11 of the back of the body are more silver-colored 1 long 5- of main grid than the back of the body
5000μm。
When being provided with the two or more silver-colored slotted unit 11 of the back of the body in the silver-colored slotted zones 10 of the back of the body, as shown in figure 3, back of the body silver fluting is single
First 11 bearing of trends are consistent with the bearing of trend for carrying on the back silver-colored main grid 1, and the width of the silver-colored slotted unit 11 of the back of the body is 10-4880 μm, excellent
Selection of land, the width of the silver-colored slotted unit 11 of the back of the body is 10-2450 μm.The length of the silver-colored slotted unit 11 of the back of the body is with carrying on the back silver-colored main grid 1
Length is identical or the silver-colored slotted unit 11 of the back of the body is than carrying on the back short 5-5000 μm of silver-colored main grid 1 or carrying on the back silver-colored slotted unit 11
Than carrying on the back silver-colored long 5-5000 μm of main grid 1.
Carry on the back and be arranged in parallel between silver-colored slotted unit 11, the spacing between the two neighboring silver-colored slotted unit 11 of the back of the body is equal, spacing
For 10-4880 μm；Spacing between the two neighboring silver-colored slotted unit 11 of the back of the body can also be unequal, and spacing is 10-4880 μm, wherein
One preferable example is that spacing is big between the back of the body silver slotted unit 11 of centre, if spacing is 800 μm, and positioned at both sides
Spacing is small between carrying on the back silver-colored slotted unit 11, if spacing is 200 μm.
It should be noted that the width of the silver-colored main grid 1 of the back of the body is more than the width for carrying on the back silver-colored slotted zones 10, it is ensured that carries on the back silver-colored slotted zones
Back silver paste is filled up in 10 so that is carried on the back silver-colored main grid 1 and is formed good Ohmic contact with P-type silicon 5.
When the bar number of the silver-colored main grid 1 of the back of the body is provided with 2-8 bars, cell photoelectric conversion performance reaches optimal.
The silver-colored main grid of the back of the body described in the utility model is set to discontinuous segmental structure, and every silver-colored main grid 1 of the back of the body is divided into 2-20 sections, adjacent
Spacing between two sections is 5-100mm.Every section of silver-colored main grid 1 of the back of the body is correspondingly arranged the silver-colored slotted zones 10 of the back of the body, on same straight line not
It is able to can also be differed with identical with the arrangement for carrying on the back the silver-colored slotted unit 11 of the back of the body in silver-colored slotted zones 10.
The utility model carries on the back the silver-colored structure of main grid 1 using noncontinuity segmented, can reduce the dosage of silver paste, and reduction is produced into
This.The pattern of the silver-colored slotted unit 11 of the back of the body of silver-colored slotted zones 10, spacing and size are carried on the back by adjusting, improves leading for backplate electric current
Output capacity, while lbg area is smaller, it is ensured that enough passivating back areas, so as to lift two-sided PERC solar cells
Photoelectric transformation efficiency.
To sum up, slotted zones and P-type silicon are all passed through using backplate described in the utility model, alum gate line 2 and the silver-colored main grid 1 of the back of the body
5 connections, the electric current export ability of backplate are further lifted.And the above-mentioned backplate of the utility model can be applied to p-type
PERC double-sided solar batteries, two-sided absorption luminous energy is realized, be significantly expanded the application of solar cell and improve photoelectricity turn
Change efficiency.
Correspondingly, as shown in figure 4, the utility model also provides a kind of p-type PERC double-sided solar batteries, including the back of the body
Face electrode, back side silicon nitride 3, backside oxide aluminium film 4, P-type silicon 5, N-type emitter stage 6, front side silicon nitride film 7 and positive silver electrode
8；The backplate, back side silicon nitride 3, backside oxide aluminium film 4, P-type silicon 5, N-type emitter stage 6, the and of front side silicon nitride film 7
Positive silver electrode 8 stacks gradually connection from bottom to up.
The backplate includes the mutual alum gate line 2 of at least 2 silver-colored main grids 1 of the back of the body being parallel to each other and 25-500 bars, institute
Alum gate line 2 is stated with carrying on the back the silver-colored vertical connection of main grid 1；
The alum gate line 2 is connected by the alum gate slotted zones 9 opened up in silicon chip back side with P-type silicon 5, alum gate slotted zones 9 with
Alum gate line 2 is in the same direction, and the silver-colored main grid 1 of the back of the body is connected by the back of the body silver slotted zones 10 opened up in silicon chip back side with P-type silicon 5；
Every silver-colored main grid 1 of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid 1 of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body
10；
At least one silver-colored slotted unit 11 of the back of the body in the silver-colored slotted zones 10 of the back of the body, it is rectangle to carry on the back the silver-colored pattern of slotted unit 11.
It should be noted that the silver-colored slotted zones 10 of the back of the body are not showed that in figure, and the quantity of alum gate line 2 is excessive, it is difficult to one in figure
One is drawn, and only representative is used as by the use of wherein several in Fig. 4.
Correspondingly, as shown in figure 5, the utility model also provides a kind of p-type PERC double-sided solar batteries, the p-type
PERC double-sided solar batteries include the backplate, back side silicon nitride 3, backside oxide aluminium film 4, P-type silicon 5, N-type transmitting
Pole 6, front side silicon nitride film 7 and positive silver electrode 8；The backplate, back side silicon nitride 3, backside oxide aluminium film 4, P-type silicon 5,
N-type emitter stage 6, front side silicon nitride film 7 and positive silver electrode 8 stack gradually connection from bottom to up.
Such as Fig. 6, the backplate includes the mutual alum gate of at least 2 silver-colored main grids 1 of the back of the body being parallel to each other and 25-500 bars
Line 2, the alum gate line 2 is with carrying on the back the silver-colored vertical connection of main grid 1；
The alum gate line 2 is connected by the alum gate slotted zones 9 opened up in silicon chip back side with P-type silicon 5, alum gate slotted zones 9 with
Alum gate line 2 is vertical, and the silver-colored main grid 1 of the back of the body is connected by the back of the body silver slotted zones 10 opened up in silicon chip back side with P-type silicon 5；
Every silver-colored main grid 1 of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid 1 of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body
10；
At least one silver-colored slotted unit 11 of the back of the body in the silver-colored slotted zones 10 of the back of the body, it is rectangle to carry on the back the silver-colored pattern of slotted unit 11.
The backplate of existing one side solar cell is made up of silver-colored main grid and Al-BSF, with existing one side solar cell
Compare, p-type PERC double-sided solar batteries described in the utility model are using some silver-colored main grids 1 of the back of the body and a plurality of aluminium be arrangeding in parallel
Grid line 2 forms, and alum gate line 2 not only substitutes full aluminum back electric field in existing one side solar cell and realizes back side extinction, is additionally operable to carry on the back
Secondary grid structure in silver electrode is used as current－carrying conductor to conduct electronics.
Moreover, alum gate line 2 and the silver-colored main grid 1 of the back of the body are all connected by slotted zones with P-type silicon 5, the electric current export energy of backplate
Power is further lifted.
Finally, using p-type PERC double-sided solar batteries made from backplate described in the utility model, silver paste can be saved
With the dosage of aluminium paste, reduce production cost, and realize two-sided absorption luminous energy, be significantly expanded solar cell application and
Improve photoelectric transformation efficiency.
It should be noted that above example is only illustrating the technical solution of the utility model rather than to the utility model
The limitation of protection domain, although being explained in detail with reference to preferred embodiment to the utility model, the ordinary skill people of this area
Member to the technical solution of the utility model it should be appreciated that can modify or equivalent substitution, without departing from the utility model
The spirit and scope of technical scheme.
Claims (10)
1. a kind of backplate of p-type PERC double-sided solar batteries, it is characterised in that including at least 2 back ofs the body being parallel to each other
The alum gate line that silver-colored main grid and 25-500 bar is parallel to each other, the alum gate line is with carrying on the back silver-colored main grid vertical connection；
The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, and the silver-colored main grid of the back of the body passes through in silicon
The back of the body silver slotted zones that the piece back side opens up are connected with P-type silicon；
Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；
At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.
2. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that the back of the body silver fluting
At least two silver-colored slotted unit of the back of the body in area, carry on the back and be arranged in parallel between silver-colored slotted unit.
3. the backplate of p-type PERC double-sided solar batteries as claimed in claim 2, it is characterised in that two neighboring back of the body silver
Spacing between slotted unit is equal, and spacing is 10-4880 μm.
4. the backplate of p-type PERC double-sided solar batteries as claimed in claim 2, it is characterised in that two neighboring back of the body silver
Spacing between slotted unit is unequal, and spacing is 10-4880 μm.
5. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that alum gate slotted zones with
Alum gate line is in the same direction or vertical.
6. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1 or 2, it is characterised in that the back of the body silver is opened
The width of groove unit is 10-5000 μm；The width of the silver-colored main grid of the back of the body is 0.5-5mm.
7. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that the silver-colored main grid of the back of the body
Bar number be 2-8 bars.
8. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that every silver-colored main grid of the back of the body
It is divided into 2-20 sections, the spacing between adjacent two sections is 5-50mm.
A kind of 9. p-type PERC double-sided solar batteries provided with backplate as claimed in claim 1, it is characterised in that the P
Type PERC double-sided solar batteries include the backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type transmitting
Pole, front side silicon nitride film and positive silver electrode；The backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type hair
Emitter-base bandgap grading, front side silicon nitride film and positive silver electrode stack gradually connection from bottom to up；
The backplate includes the alum gate line that at least 2 silver-colored main grids of the back of the body being parallel to each other and 25-500 bars are parallel to each other, described
Alum gate line is with carrying on the back silver-colored main grid vertical connection；
The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, and alum gate slotted zones and alum gate line are same
To the silver-colored main grid of the back of the body is connected by the back of the body silver slotted zones opened up in silicon chip back side with P-type silicon；
Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；
At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.
10. a kind of p-type PERC double-sided solar batteries provided with backplate as claimed in claim 1, it is characterised in that described
P-type PERC double-sided solar batteries include the backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type transmitting
Pole, front side silicon nitride film and positive silver electrode；The backplate, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type hair
Emitter-base bandgap grading, front side silicon nitride film and positive silver electrode stack gradually connection from bottom to up；
The backplate includes the alum gate line that at least 2 silver-colored main grids of the back of the body being parallel to each other and 25-500 bars are parallel to each other, described
Alum gate line is with carrying on the back silver-colored main grid vertical connection；
The alum gate line is connected by the alum gate slotted zones opened up in silicon chip back side with P-type silicon, and alum gate slotted zones are hung down with alum gate line
Directly, the silver-colored main grid of the back of the body is connected by the back of the body silver slotted zones opened up in silicon chip back side with P-type silicon；
Every silver-colored main grid of the back of the body is set to discontinuous segmental structure, and every section of silver-colored main grid of the back of the body is correspondingly arranged the silver-colored slotted zones of the back of the body；
At least one silver-colored slotted unit of the back of the body in the silver-colored slotted zones of the back of the body, it is rectangle to carry on the back silver-colored slotted unit pattern.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039545A (en) * | 2017-03-03 | 2017-08-11 | 浙江爱旭太阳能科技有限公司 | The backplate and battery of p-type PERC double-sided solar batteries |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039545A (en) * | 2017-03-03 | 2017-08-11 | 浙江爱旭太阳能科技有限公司 | The backplate and battery of p-type PERC double-sided solar batteries |
| CN107039545B (en) * | 2017-03-03 | 2019-11-12 | 浙江爱旭太阳能科技有限公司 | The rear electrode and battery of p-type PERC double-sided solar battery |
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Address after: 322009 Zhejiang city in Jinhua Province town of Yiwu City, Su Fuk Road No. 126 Co-patentee after: Guangdong Asahi Polytron Technologies Inc Patentee after: Zhejiang love Solar Energy Technology Co., Ltd. Address before: 322009 Zhejiang city in Jinhua Province town of Yiwu City, Su Fuk Road No. 126 Co-patentee before: Guangdong Aiko Solar Energy Technology Co., Ltd. Patentee before: Zhejiang love Solar Energy Technology Co., Ltd. |