CN206697488U - 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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- CN206697488U CN206697488U CN201720200271.0U CN201720200271U CN206697488U CN 206697488 U CN206697488 U CN 206697488U CN 201720200271 U CN201720200271 U CN 201720200271U CN 206697488 U CN206697488 U CN 206697488U
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- gate line
- silver
- alum gate
- solar batteries
- sided solar
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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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Abstract
The utility model discloses a kind of backplate of p-type PERC double-sided solar batteries, including at least two silver-colored main grids of the back of the body being parallel to each other and a plurality of alum gate line being parallel to each other, the alum gate line is with carrying on the back silver-colored main grid vertical connection；The both sides of the edge of the silver-colored main grid of the back of the body are in dentalation, and the silver-colored main grid of the back of the body is connected by dentalation with alum gate line, teeth portion and the alum gate line overlap of the dentalation.The invention also discloses a kind of p-type PERC double-sided solar batteries.It is simple in construction using the utility model, easy industrialization, while improve 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.
The Making programme of p-type PERC double-sided solar batteries includes：Making herbs into wool, diffusion, etching, backside passivation layer deposition,
PECVD back side coating films, positive PECVD plated films, silk-screen printing, sintering, anti-LID annealing.Solar battery sheet is changed by luminous energy
During electric energy, photo-generated carrier caused by its inside needs the electrode by outside printing to collect and draw, Ran Houyu
External circuit connects, so as to which electric current be transported out.Above-mentioned silkscreen process is further subdivided into solar cell
The printing of back of the body primary gate electrode, carry on the back secondary gate electrode printing and positive electrode printing.Positive electrode slurry and back electrode slurry are printed on crystal silicon too
On the front and back, through oversintering, play a part of collected current in positive electricity pond.The design of backplate figure not only determines the back of the body
The passivating back effect and electric current collection effect of passivation cell, so as to influence the photoelectric transformation efficiency of battery, also determine scale
The complexity of metaplasia production. art.
It is, therefore, desirable to provide a kind of new backplate, simple in construction, easy industrialization, while improve the photoelectricity of battery
Conversion efficiency.
Utility model content
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, simple in construction, easy industrialization, the photoelectric transformation efficiency of battery can be improved.
Technical problem to be solved in the utility model also resides in, there is provided a kind of p-type PERC double-sided solar batteries, can be double
Face absorbs sunshine, simple in construction, easy industrialization, can also improve the photoelectric transformation efficiency of battery.
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, including at least two silver-colored main grids of the back of the body being parallel to each other and a plurality of alum gate line being parallel to each other, the alum gate line and back of the body silver are main
Grid vertical connection；The both sides of the edge of the silver-colored main grid of the back of the body are in dentalation, and the silver-colored main grid of the back of the body passes through dentalation and alum gate line
Connection, teeth portion and the alum gate line overlap of the dentalation.
As the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates, the teeth portion is quadrangle
It is or semicircle.
As the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates, the teeth portion is along alum gate line
The length of length direction is 0.05 ~ 10mm.
As the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates, the width of the alum gate line
For 30-550 μm, the width of the silver-colored main grid of the back of the body is 0.5-5mm.
It is described to carry on the back silver-colored main grid and aluminium as the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates
The pattern for the overlapping region that grid line is formed is triangle, quadrangle, semicircle or pentagon.
It is described to carry on the back silver-colored main grid and aluminium as the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates
Length of the overlapping region that grid line is formed along alum gate line length direction is 0.05 ~ 10mm.
As the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates, the number of the silver-colored main grid of the back of the body
Measure as 2 ~ 8, the quantity of the alum gate line is 25 ~ 500.The alum gate line can also be shaped form, arc, waveform etc..
As the optimal technical scheme of aforementioned p-type PERC double-sided solar battery backplates, the quantity of the alum gate line
For 25 ~ 500.
Correspondingly, the utility model additionally provides a kind of p-type PERC double-sided solar batteries, including 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 back side electricity
Pole, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type emitter stage, front side silicon nitride film and positive silver electrode from bottom to up according to
Secondary stacking connection；The backplate includes at least two silver-colored main grids of the back of the body being parallel to each other and a plurality of alum gate line being parallel to each other,
The alum gate line is with carrying on the back silver-colored main grid vertical connection；The both sides of the edge of the silver-colored main grid of the back of the body are in dentalation, and the silver-colored main grid of the back of the body leads to
Cross dentalation to be connected with alum gate line, teeth portion and the alum gate line overlap of the dentalation；The back side silicon nitride and the back side
Pellumina forms lbg area after lbg, and the alum gate line is connected by lbg area with P-type silicon.
As the optimal technical scheme of aforementioned p-type PERC double-sided solar batteries, the alum gate line is put down with lbg area
OK.
As the optimal technical scheme of aforementioned p-type PERC double-sided solar batteries, the alum gate line hangs down with lbg area
Directly.
Implement the utility model, 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 can improve the photoelectric transformation efficiency of battery as backplate, simple in construction, easy industrialization.Adopt
Silver paste and the dosage of aluminium paste can be saved with the p-type PERC double-sided solar batteries of backplate described in the utility model, reduces life
Cost is produced, and realizes two-sided absorption luminous energy, the application of solar cell is significantly expanded and improves photoelectric transformation efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model p-type PERC double-sided solar battery backplates；
Fig. 2 is enlarged drawing at A in Fig. 1；
Fig. 3 is the structural representation that silver-colored main grid is carried on the back in Fig. 2；
Fig. 4 is the structural representation of the utility model p-type PERC double-sided solar batteries.
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.Only this state, the utility model occur in the text or will appear from upper and lower, left and right, it is preceding,
Afterwards, the orientation such as inside and outside word, only on the basis of accompanying drawing of the present utility model, it is not to specific restriction of the present utility model.
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 silicon nitride 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 shown in Fig. 1 ~ 3, the utility model provides a kind of backplate of p-type PERC double-sided solar batteries, including extremely
The few two silver-colored main grids 1 of the back of the body being parallel to each other and a plurality of alum gate line 2 being parallel to each other, the alum gate line 2 is vertical with carrying on the back silver-colored main grid 1 to be connected
Connect；The both sides of the edge of the silver-colored main grid 1 of the back of the body are in dentalation, and the silver-colored main grid 1 of the back of the body is connected by dentalation with alum gate line 2,
The teeth portion 11 of the dentalation is overlapping with alum gate line 2.
Backplate described in the utility model is arranged on the lower section of back side silicon nitride 3, and can be absorbed too to adapt to the back side
Sunlight, full aluminum back electric field is no longer set, but is changed to set the alum gate line 2 of many bars, using lbg technology overleaf nitrogen
Lbg area 9 is opened up in SiClx film 3 and backside oxide aluminium film 4, and alum gate line 2 is printed in these lbg areas 9, so as to
Localized contact can be formed with P-type silicon 5, the alum gate line 2 of intensive parallel arrangement, which can not only play, improves open-circuit voltage Voc and short circuit electricity
Jsc is flowed, reduces minority carrier recombination rate, improves the effect of cell photoelectric conversion efficiency, alternative existing one side battery structure
Full aluminum back electric field, and alum gate line 2 comprehensively cover silicon chip the back side, sunshine can be from the sensitive area between alum gate line 2
It is projected in silicon chip, so as to realize that silicon chip back side absorbs luminous energy, greatly improves the photoelectric transformation efficiency of battery.
Preferably, the quantity of the silver-colored main grid of the back of the body is 2 ~ 8, and the quantity of the alum gate line is 25 ~ 500.
As shown in Fig. 1 ~ 3, alum gate line 2, wherein it is continuous straight grid to carry on the back silver-colored main grid 1, carries on the back silver with carrying on the back silver-colored 1 perpendicular connection of main grid
The both sides of the edge of main grid 1 are in dentalation, carry on the back silver-colored main grid 1 and are connected by dentalation with alum gate line 2, the tooth of the dentalation
Portion 11 is overlapping with alum gate line 2.
Because back side silicon nitride 3 and backside oxide aluminium film 4 are provided with lbg area 9, printing aluminium paste forms alum gate line 2
When, aluminium paste is filled to lbg area 9 so that alum gate line 2 forms localized contact with P-type silicon 5, can be by electric transmission to alum gate line
2, the silver-colored main grid 1 of the back of the body intersected with alum gate line 2 then collects the electronics on alum gate line 2, it follows that alum gate line described in the utility model
2 play raising open-circuit voltage Voc and short circuit current Jsc, reduce minority carrier recombination rate, and the effect of transmission electronics, can
Full aluminum back electric field in existing one side solar cell and the secondary grid structure in back of the body silver electrode are substituted, not only reduces silver paste and aluminium paste
Dosage, reduce production cost, and realize two-sided absorption luminous energy, be significantly expanded the application of solar cell and improve light
Photoelectric transformation efficiency.
It was found from from Fig. 2 and Fig. 3, teeth portion 11 and alum gate line 2 overlapping connection of the silver-colored main grid 1 by dentalation are carried on the back, therefore,
The size and shape of teeth portion 11 in silver-colored main grid 1 is carried on the back by adjusting, can effectively reduce the dosage of silver paste, it is preferable that the teeth portion
11 be quadrangle or semicircle, and the length of the teeth portion 11 is 0.05 ~ 10mm（That is, described teeth portion 11 is along the length direction of alum gate line 2
Length be 0.05 ~ 10mm）, utility model people is had found when the length of teeth portion 11 is 0.05 ~ 10mm, can be easy to carry on the back silver-colored main grid 1
It is overlapping with alum gate line 2, as the length of teeth portion 11 is less than 0.05mm, then carry on the back silver-colored main grid 1 be then easily in contact with alum gate line 2 it is bad,
As the length of teeth portion 11 is more than 10mm, then waste of materials.Meanwhile carry on the back silver-colored main grid 1 and alum gate line 2 there is overlapping region 10, Mei Gechong
The length in folded region 10 is 0.05 ~ 10mm（That is, overlapping region that silver-colored main grid and alum gate line formed is carried on the back along alum gate line length direction
Length is 0.05 ~ 10mm）, utility model people discovery is when overlapping region 10 is in 0.05 ~ 10mm scopes, the electric conductivity of backplate
Can be good, as the length of overlapping region 10 is less than 0.05mm, then be easily in contact it is bad, such as being more than for the length of overlapping region 10
10mm, then aluminium paste is wasted, and because the area of overlapping region 10 is excessive, the back of the body silver main grid 1 and alum gate line 2 of shaping are because of the coefficient of expansion
Differ etc. physical property, alum gate line 2 easily occurs during battery use peels off from the silver-colored main grid 1 of the back of the body, or alum gate line 2 and back of the body silver
The intersection of main grid 1 is broken, so as to influence the stability of battery quality and performance.The utility model people is by prolonged and repeated
Contrast experiment has found that, when carrying on the back the length of overlapping region 10 of silver-colored main grid 1 and alum gate line 2 in 0.05 ~ 10mm scopes, battery performance is most
It is good.
It should be noted that preferably, the overlapping region that the silver-colored main grid 1 of the back of the body described in the utility model is formed with alum gate line 2
Pattern is triangle, quadrangle, semicircle or pentagon.
Preferably, the width of the alum gate line 2 is 30-550 μm, and the width of the silver-colored main grid 1 of the back of the body is 0.5-5mm.
Correspondingly, as shown in figure 4, 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.
The backplate includes at least two silver-colored main grids 1 of the back of the body being parallel to each other and a plurality of alum gate line 2 being parallel to each other, institute
Alum gate line 2 is stated with carrying on the back the silver-colored vertical connection of main grid 1；The both sides of the edge of the silver-colored main grid 1 of the back of the body are in dentalation, the silver-colored main grid 1 of the back of the body
It is connected by dentalation with alum gate line 2, the teeth portion 11 of the dentalation is overlapping with alum gate line 2.
The back side silicon nitride 3 and backside oxide aluminium film 4 form lbg area 9, the aluminium after lbg
Grid line 2 is connected by lbg area 9 with P-type silicon 5.
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.
It should be noted that the alum gate line 2 is parallel or vertical with lbg area 9, wherein, when the alum gate line 2 with
When lbg area 9 is vertical, it is not necessary to carry out registration process, can effectively reduce production difficulty.
Finally, using the p-type PERC double-sided solar batteries of 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 two back ofs the body being parallel to each other
Silver-colored main grid and a plurality of alum gate line being parallel to each other, the alum gate line is with carrying on the back silver-colored main grid vertical connection；
The both sides of the edge of the silver-colored main grid of the back of the body are in dentalation, and the silver-colored main grid of the back of the body is connected by dentalation with alum gate line, institute
State the teeth portion and alum gate line overlap of dentalation.
2. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that the teeth portion is
Quadrangle or semicircle.
3. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that the teeth portion edge
The length in alum gate line length direction is 0.05 ~ 10mm.
4. the backplate of p-type PERC double-sided solar batteries as claimed in claim 1, it is characterised in that the alum gate line
Width be 30-550 μm, the width of the silver-colored main grid of the back of the body is 0.5-5mm.
5. 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 is main
The pattern for the overlapping region that grid are formed with alum gate line is triangle, quadrangle, semicircle or pentagon.
6. 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 is main
Length of the overlapping region that grid are formed with alum gate line along alum gate line length direction is 0.05 ~ 10mm.
7. 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 is main
The quantity of grid is 2 ~ 8, and the quantity of the alum gate line is 25 ~ 500.
8. 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 back side
Electrode, 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 back of the body
Face electrode, back side silicon nitride, backside oxide aluminium film, P-type silicon, N-type emitter stage, front side silicon nitride film and positive silver electrode from it is lower to
On stack gradually connection；
The backplate includes at least two silver-colored main grids of the back of the body being parallel to each other and a plurality of alum gate line being parallel to each other, the alum gate
Line is with carrying on the back silver-colored main grid vertical connection；
The both sides of the edge of the silver-colored main grid of the back of the body are in dentalation, and the silver-colored main grid of the back of the body is connected by dentalation with alum gate line, institute
State the teeth portion and alum gate line overlap of dentalation；
The back side silicon nitride and backside oxide aluminium film form lbg area after lbg, and the alum gate line passes through
Lbg area is connected with P-type silicon.
9. p-type PERC double-sided solar batteries as claimed in claim 8, it is characterised in that the alum gate line and lbg
Area is parallel.
10. p-type PERC double-sided solar batteries as claimed in claim 8, it is characterised in that the alum gate line and lbg
Area is vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720200271.0U CN206697488U (en) | 2017-03-03 | 2017-03-03 | The backplate and battery of p-type PERC double-sided solar batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720200271.0U CN206697488U (en) | 2017-03-03 | 2017-03-03 | The backplate and battery of p-type PERC double-sided solar batteries |
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| Publication Number | Publication Date |
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| CN206697488U true CN206697488U (en) | 2017-12-01 |
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ID=60442285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720200271.0U Active CN206697488U (en) | 2017-03-03 | 2017-03-03 | The backplate and battery of p-type PERC double-sided solar batteries |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847945A (en) * | 2017-03-03 | 2017-06-13 | 广东爱康太阳能科技有限公司 | The backplate and battery of p-type PERC double-sided solar batteries |
-
2017
- 2017-03-03 CN CN201720200271.0U patent/CN206697488U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847945A (en) * | 2017-03-03 | 2017-06-13 | 广东爱康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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Address after: No. 69, C District, Sanshui Industrial Park, Sanshui, Foshan, Guangdong Patentee after: GUANGDONG AIKO SOLAR ENERGY TECHNOLOGY Co.,Ltd. Address before: 528100, Sanshui District, Guangdong City, Foshan Industrial Park, No. C District, No. 69 Patentee before: GUANGDONG AIKO SOLAR ENERGY TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20180202 Address after: No. 69, C District, Sanshui Industrial Park, Sanshui, Foshan, Guangdong Co-patentee after: ZHEJIANG AIKO SOLAR ENERGY TECHNOLOGY Co.,Ltd. Patentee after: GUANGDONG AIKO SOLAR ENERGY TECHNOLOGY Co.,Ltd. Address before: No. 69, C District, Sanshui Industrial Park, Sanshui, Foshan, Guangdong Patentee before: GUANGDONG AIKO SOLAR ENERGY TECHNOLOGY Co.,Ltd. |
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