CN208014711U - A kind of p-type IBC electrode of solar battery structures - Google Patents
A kind of p-type IBC electrode of solar battery structures Download PDFInfo
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- CN208014711U CN208014711U CN201820586620.1U CN201820586620U CN208014711U CN 208014711 U CN208014711 U CN 208014711U CN 201820586620 U CN201820586620 U CN 201820586620U CN 208014711 U CN208014711 U CN 208014711U
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Abstract
The utility model discloses a kind of p-type IBC electrode of solar battery structures, including main gate line, the main gate line to be set on solar cell, and the both sides of the main gate line are both provided with " Contraband " shape pair grid line, and there are gaps with main gate line for " Contraband " the shape pair grid line；" Contraband " shape pair grid line of the every main gate line side is connected by drawing grid line, and " Contraband " shape pair grid line in the adjacent main gate line is staggered, is mutually not attached to；It is described draw grid line by draw grid connect grid line be connected in main gate line.The utility model is arranged by the connection between main gate line and secondary grid line, the utilization rate of slurry can be reduced, and largely avoid positive and negative anodes intersect risk while, electrode can also be promoted and collect carrier ability, compared to the efficiency 0.8-1.0% that the Conventional insulation glue metallization scheme of 8 main grids can improve battery, and broken string equivalent risk in commercial process can be effectively reduced, practicability is very strong, highly promotes.
Description
Technical field
The utility model is related to technical field of solar batteries, specially a kind of p-type IBC electrode of solar battery structures.
Background technology
Conventional crystalline silicon solar battery front side (light-receiving surface) is due to by shading caused by metal electrode, leading to solar-electricity
Pond cannot adequately utilize solar energy, to restrict the transfer efficiency of solar cell.With solar battery technology
Development and application, it is a kind of that metal electrode is accomplished that back-contact (IBC) solar cell of cell backside comes into being.
IBC refers to intersection back contact battery, refers to that battery front side is electrodeless, and positive and negative polarities metal grid lines are in finger-like cross arrangement
In cell backside, the feature of IBC battery maximums is exactly the back side that PN junction alloy belongs to contact all in battery, and front is without metal electricity
The influence that pole is blocked, therefore there is higher short circuit current Jsc, while the back side can allow wider metal grid lines to reduce string
Join resistance Rs to improve fill factor FF, in addition the open-circuit voltage that battery front-surface field and well passivated zone of action are come increases
Benefit so that the unobstructed battery in this front not only high conversion efficiency, but also seem more attractive.
So the design of the back electrode structure of IBC batteries is the technology emphasis of the battery, but electrode structure is printing
When, the complexity, the use of slurry and the avoiding for disconnected grid situation that consider printing technology are needed, in the prior art, application No. is
A kind of IBC cell electrode structures of " 201720080498.6 ", including anode contact thin grid line, anode connection grid line, cathode and connect
It touches thin grid line and connects grid line with cathode, contact thin grid line, anode connection grid line, the thin grid line of cathode contact by anode connects with cathode
Grid line is arranged in the same plane, and the wherein identical connection grid line of polarity and the thin grid line vertical connection of contact, polarity is opposite
Connection grid line and contact thin grid line, the thin grid line of contact and the thin grid line of contact, connection grid line and connection grid line mutually insulated；It should
IBC cell electrode structures reduce big face compared to the efficiency 0.3-0.5% that Conventional insulation glue metallization scheme can improve battery
The complexity of product IBC battery main gate line printings, increases the alternative of technique.
But the above-mentioned IBC cell electrode structures, there is also following more apparent defects：When printing thin grid line, if
Print thickness is excessive, wastes printing slurry and printing technology difficulty increases, print thickness is too small, and it is existing to be extremely susceptible to disconnected grid
As to influence battery performance, and the setting for passing through the electrode structure so that the battery efficiency is promoted not notable.
Utility model content
The purpose of this utility model is to provide a kind of p-type IBC electrode of solar battery structures, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the utility model provides the following technical solutions：
A kind of p-type IBC electrode of solar battery structures, including main gate line, the main gate line are set on solar cell,
The both sides of the main gate line are both provided with " Contraband " shape pair grid line, and there are gaps with main gate line for " Contraband " the shape pair grid line；
" Contraband " shape pair grid line of the every main gate line side is connected by drawing grid line, " Contraband " in the adjacent main gate line
Shape pair grid line is staggered, is mutually not attached to；
It is described draw grid line by draw grid connect grid line be connected in main gate line.
Preferably, the main gate line is set to positive electrode main grid and negative electrode main grid successively.
Preferably, described " Contraband " the shape pair grid line connects grid line by secondary grid close to main gate line one end and is connected in main gate line.
Preferably, the both ends of the main gate line are respectively connected with end grid line.
Preferably, the quantitative range of the main gate line is 10-25, and the quantitative range of " Contraband " the shape pair grid line is
80-120.
Compared with prior art, the utility model has the beneficial effects that：
The utility model is arranged by the connection between main gate line and secondary grid line so that the connection between electrode structure is more
Stablize, and the utilization rate of slurry can be reduced, and largely while avoiding positive and negative anodes from intersecting risk, can be with
It promotes electrode and collects carrier ability, compared to the efficiency 0.8-that the Conventional insulation glue metallization scheme of 8 main grids can improve battery
1.0%, and the broken string equivalent risk in commercial process can be effectively reduced, practicability is very strong, highly promotes.
Description of the drawings
Fig. 1 is the electrode structure schematic diagram of the utility model；
Fig. 2 is the A plot structure enlarged diagrams of the utility model；
Fig. 3 draws grid line attachment structure schematic diagram for the preferred embodiment in the utility model；
Fig. 4 is the B plot structure enlarged diagrams of the utility model；
Fig. 5 is the electrode structure schematic diagram of the preferred embodiment in the utility model；
Fig. 6 is the C plot structure enlarged diagrams of the utility model.
In figure：1 solar cell, 2 main gate lines, 3 " Contraband " shape pair grid lines, 4 draw grid line, 5 draw grid connection grid line, 6 secondary grid connect
Connect grid line, 7 end grid lines.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
- 6 are please referred to Fig.1, the utility model provides a kind of technical solution：
Embodiment one：
As shown in Figure of description 1 and Figure of description 2, a kind of p-type IBC electrode of solar battery structures, including main grid
Line 2, main gate line 2 are set on solar cell 1, and main gate line 2 is used for connecting the n-layer in solar cell 1 and p layers, so main
Grid line 2 is set to positive electrode main grid and negative electrode main grid successively, and the both sides of main gate line 2 are both provided with " Contraband " shape pair grid line 3,
" Contraband " shape pair grid line 3 is symmetricly set on 2 both sides of main gate line, and " Contraband " shape pair grid line 3 and main gate line 2 are there are gap, and the two of main gate line 2
End is respectively connected with end grid line 7, holds the setting of grid line 7, facilitates collecting and exporting for electric current, is convenient for the connection of busbar.
" Contraband " shape pair grid line 3 of every 2 side of main gate line is connected by drawing grid line 4, draws that grid line 4 is parallel with main gate line 2 to be set
It sets and is not in contact with main gate line 2, " Contraband " shape pair grid line 3 in adjacent main gate line 2 is staggered, is mutually not attached to；
Draw grid line 4 and be connected in main gate line 2 by drawing grid connection grid line 5 so that " Contraband " shape pair grid line 3 connects with main gate line 2
It is logical, it is electrically transmitted, the quantitative range of main gate line 2 is 10, and the quantitative range of " Contraband " shape pair grid line 3 is 80 so that print
The usage amount of silver paste is significantly declined when brush electrode, and can be carried compared to the Conventional insulation glue metallization scheme of 8 main grids
The efficiency 0.8% of high battery.
Embodiment two：
As shown in Figure of description 3 and Figure of description 4, a kind of p-type IBC electrode of solar battery structures, including main grid
Line 2, main gate line 2 are set on solar cell 1, and main gate line 2 is used for connecting the n-layer in solar cell 1 and p layers, so main
Grid line 2 is set to positive electrode main grid and negative electrode main grid successively, and the both sides of main gate line 2 are both provided with " Contraband " shape pair grid line 3,
" Contraband " shape pair grid line 3 is symmetricly set on 2 both sides of main gate line, and " Contraband " shape pair grid line 3 and main gate line 2 are there are gap, and the two of main gate line 2
End is respectively connected with end grid line 7, holds the setting of grid line 7, facilitates collecting and exporting for electric current, is convenient for the connection of busbar.
" Contraband " shape pair grid line 3 of every 2 side of main gate line is connected by drawing grid line 4, draws that grid line 4 is parallel with main gate line 2 to be set
It sets and is not in contact with main gate line 2, " Contraband " shape pair grid line 3 in adjacent main gate line 2 is staggered, is mutually not attached to；
" Contraband " shape pair grid line 3 connects grid line 6 by secondary grid close to 2 one end of main gate line and is connected in main gate line 2 so that " Contraband "
Shape pair grid line 3 is connected to main gate line 2, is electrically transmitted, and the quantitative range of main gate line 2 is 18, the number of " Contraband " shape pair grid line 3
Amount ranging from 100 so that the usage amount of silver paste is significantly declined when printing electrode, and conventional exhausted compared to 8 main grids
Edge glue metallization scheme can improve the efficiency 0.9% of battery.
Embodiment three：
As shown in Figure of description 5 and Figure of description 6, a kind of p-type IBC electrode of solar battery structures, including main grid
Line 2, main gate line 2 are set on solar cell 1, and main gate line 2 is used for connecting the n-layer in solar cell 1 and p layers, so main
Grid line 2 is set to positive electrode main grid and negative electrode main grid successively, and the both sides of main gate line 2 are both provided with " Contraband " shape pair grid line 3,
" Contraband " shape pair grid line 3 is symmetricly set on 2 both sides of main gate line, and " Contraband " shape pair grid line 3 and main gate line 2 are there are gap, and the two of main gate line 2
End is respectively connected with end grid line 7, holds the setting of grid line 7, facilitates collecting and exporting for electric current, is convenient for the connection of busbar.
" Contraband " shape pair grid line 3 of every 2 side of main gate line is connected by drawing grid line 4, draws that grid line 4 is parallel with main gate line 2 to be set
It sets and is not in contact with main gate line 2, " Contraband " shape pair grid line 3 in adjacent main gate line 2 is staggered, is mutually not attached to；
Draw grid line 4 and be connected in main gate line 2 by drawing grid connection grid line 5, and " Contraband " shape pair grid line 3 is close to main gate line 2
One end connects grid line 6 by secondary grid and is connected in main gate line 2 so that " Contraband " shape pair grid line 3 is connected to main gate line 2, is carried out electrical
It transmits, the quantitative range of main gate line 2 is 25, and the quantitative range of " Contraband " shape pair grid line 3 is 120 so that silver-colored when printing electrode
The usage amount of slurry is significantly declined, and the effect of battery can be improved compared to the Conventional insulation glue metallization scheme of 8 main grids
Rate 1%.
Contrast experiment：
Comparative example：It is printed using the electrode of the Conventional insulation glue metallization scheme of 8 main grid of identical printing slurry pair,
Measure the silver paste usage amount of 100 pieces of identical solar panels of printing and the disconnected grid quantity of 100 pieces of solar panels；
Experimental example：Using identical printing slurry to the electrode structure of embodiment one, embodiment two and embodiment three into
Row printing, measures the silver paste usage amount and 100 blocks of solar energy for printing 100 pieces of solar panels identical with comparative example
The disconnected grid quantity of solar panel, comparative experimental data are as shown in table 1 below：
Table 1
| Silver paste usage amount (L) | Disconnected grid quantity (piece) | |
| Comparative example | 300 | 12 |
| Embodiment one | 180 | 3 |
| Embodiment two | 204 | 3 |
| Embodiment three | 260 | 0 |
It can be obtained according to data in upper table 1, the embodiments of the present invention print electrode required slurry usage amount phase
The silver paste usage amount for comparing comparative example has apparent reduction, and significant reduction is also obtained in the cell piece quantity of disconnected grid.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (5)
1. a kind of p-type IBC electrode of solar battery structures, including main gate line (2), the main gate line (2) is set to solar-electricity
On pond (1), it is characterised in that：The both sides of the main gate line (2) are both provided with " Contraband " shape pair grid line (3), " Contraband " the shape pair grid
There are gaps with main gate line (2) for line (3)；
" Contraband " shape pair grid line (3) of every main gate line (2) side is connected by drawing grid line (4), the adjacent main gate line (2)
On " Contraband " shape pair grid line (3) be staggered, be mutually not attached to；
It is described draw grid line (4) by draw grid connect grid line (5) be connected in main gate line (2).
2. a kind of p-type IBC electrode of solar battery structures according to claim 1, it is characterised in that：The main gate line
(2) it is set to positive electrode main grid and negative electrode main grid successively.
3. a kind of p-type IBC electrode of solar battery structures according to claim 1, it is characterised in that：" Contraband " the shape pair
Grid line (3) connects grid line (6) by secondary grid close to main gate line (2) one end and is connected in main gate line (2).
4. a kind of p-type IBC electrode of solar battery structures according to claim 1, it is characterised in that：The main gate line
(2) both ends are respectively connected with end grid line (7).
5. a kind of p-type IBC electrode of solar battery structures according to claim 1, it is characterised in that：The main gate line
(2) quantitative range is 10-25, and the quantitative range of " Contraband " the shape pair grid line (3) is 80-120.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447921A (en) * | 2018-04-24 | 2018-08-24 | 通威太阳能（安徽）有限公司 | A kind of p-type IBC electrode of solar battery structures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447921A (en) * | 2018-04-24 | 2018-08-24 | 通威太阳能（安徽）有限公司 | A kind of p-type IBC electrode of solar battery structures |
| CN108447921B (en) * | 2018-04-24 | 2024-02-02 | 通威太阳能（安徽）有限公司 | Electrode structure of P-type IBC solar cell |
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