CN209056505U - A kind of PERC battery component - Google Patents
A kind of PERC battery component Download PDFInfo
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- CN209056505U CN209056505U CN201821909544.XU CN201821909544U CN209056505U CN 209056505 U CN209056505 U CN 209056505U CN 201821909544 U CN201821909544 U CN 201821909544U CN 209056505 U CN209056505 U CN 209056505U
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- back electrode
- perc
- welding
- cell piece
- battery component
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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
- Y02E10/547—Monocrystalline silicon PV cells
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Abstract
The utility model discloses a kind of PERC battery components, PERC battery component includes: PERC cell piece and welding, multiple PERC cell pieces are connected by welding, the back electrode of PERC cell piece meets: in the case that back electrode slurry usage amount is constant, back electrode width is 1.9~2.5 times of welding width.Battery back electrode width in the battery component increases, and can improve battery back electrode local pressure, to enhance the carrying of cell piece regional area, and then promotes the load performance of corresponding photovoltaic module product.
Description
Technical field
The utility model relates to manufacture of solar cells manufacture fields, and in particular to a kind of PERC battery component.
Background technique
With the development of photovoltaic module industry technology, many company's general components have upgraded to the higher PERC group of power
Part, it is to use the higher PERC cell piece of photoelectric conversion efficiency that PERC component, which is compared to the maximum difference of general components,.
PERC cell piece is compared to the maximum difference of conventional batteries piece overleaf technique, and technique increases back side growth
Al2O3With SiN passivation layer, backside laser cutting is then carried out again, is formed and is in electrical contact with back electrode；Laser grooving results in battery
The decline of piece mechanical strength, thereby reduces the load performance of component.
The mode for improving the load performance of component at present mainly has: increasing silicon wafer thickness, improves battery preparation technique and back
Electrode slurry, upgrade components encapsulating material (increase frame wall thickness or type chamber, increase back plate thickness) etc., these modes are significantly increased
Material cost, but can not have and thoroughly solve the problems, such as that photovoltaic module load performance is low.
As shown in Figure 1,60 type PERC photovoltaic modulies, carry out welding using 60 PERC photovoltaic cells and interconnect, electricity
The pond back side is provided with terminal box 2, and the circuit of battery passes through conductive welding and connect with terminal box 2.Wherein, in PERC photovoltaic module
The direct welding manner of cell piece is as shown in Fig. 2, the welding between cell piece is interconnected by making between cell piece connected two-by-two
Welding series connection is carried out with one short welding 3.Conventional, crack 80% or so is related to welding position after carrying out load test,
The accurate analysis of EL finds crack from from the crack of 6 position of back electrode 4 divergings outward.
Utility model content
Cost was not only increased for the scheme of material consumption added above etc but also cannot thoroughly improve that load performance is low to ask
Topic, the utility model provide a kind of PERC battery component, by increasing the back electrode width of battery in battery component, improve electricity
The local pressure of pond back electrode to enhance the carrying of cell piece regional area, and then promotes the load of corresponding photovoltaic module product
Lotus performance.
In order to realize the utility model aim, adopt the technical scheme that:
A kind of PERC battery component, comprising: PERC cell piece and welding, the back electrode on adjacent PERC cell piece pass through weldering
Band connection forms series connection, and the back electrode of PERC cell piece meets: the effective width of back electrode and welding vertical direction is that welding is wide
1.9~2.5 times of degree.
The PERC cell piece back side is provided with discontinuous back electrode, and back electrode effective width is not less than 1.8mm.
The back electrode is localized contact electrode, and localized contact electrode is arranged in cell backside with array pattern.
Array pattern is one-dimensional, two-dimentional geometric figure or one-dimensional and two-dimentional geometric figure combination, one-dimensional geometric figure choosing
From: line segment, camber line or grid line shape；Two-dimentional geometric figure is selected from: circle, spindle, annular, polygon or sector.
The effective width of the back electrode refers to the minimum widith with the perpendicular direction of back electrode arranged direction.
Compared with prior art, the utility model has the beneficial effects that
The utility model improves battery back electrode local pressure by optimization back electrode of solar cell, increases battery back
The width of electrode, it is desirable that back electrode effective width is not less than 1.8mm.Especially by rational design so that back electrode is vertical with welding
The effective width in direction is 1.9~2.5 times of welding width.Width by increasing back electrode makes welding welding contact more
Stablize, weld strength increases, and then enhances the carrying of cell piece regional area, promotes the load of corresponding photovoltaic module product
Energy.Especially the structure can be in the case where not increasing back electrode slurry usage amount, so that the cost of manufacture of battery is constant, also
Cell piece load performance can be promoted.
Detailed description of the invention
Fig. 1 is the low position view present in crack of 60 type PERC photovoltaic module back side load performances；
Fig. 2 is that the welding between the cell piece in Fig. 1 interconnects schematic diagram；
Fig. 3 is the improved cell piece structure schematic diagram of the utility model；
Fig. 4 is this practical improved cell piece back side schematic illustration；
Fig. 5 is this practical improved 60 type PERC photovoltaic module schematic rear view of an embodiment；
In figure, 1 is cell piece, and 2 be terminal box, and 3 be welding, and 4 is at crack, 5 are Al-BSF, and 6 be back electrode 6.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model
It can be easier to be understood by the person skilled in the art with feature.It should be noted that for the explanation of these embodiments
It is used to help understand the utility model, but does not constitute the restriction to the utility model.In addition, sheet disclosed below is practical new
Involved technical characteristic can be combined with each other as long as they do not conflict with each other in each embodiment of type.
As shown in figure 3, avoiding to solve the problems, such as crack using the scheme for increasing material consumption etc, this is practical new
The PERC cell piece of type, the PERC cell piece do not increase manufacturing cost to promote cell piece load performance, specifically in PERC electricity
The back side of pond piece improves.Since back electrode 6 is discontinuous metal electrode, in the silver of individual 6 monomer of back electrode
In the case that slurry usage amount is constant, so that the rectangular strip width of back electrode 6 increases.6 effective width of back electrode is not less than 1.8mm.
Here effective width refers to the minimum widith with the perpendicular direction of 6 arranged direction of back electrode.
Preferably, 6 width of cell piece back electrode of the utility model suitably increases, and width increases as original 14~
16%；Specific reference requires: the width of back electrode 6 is 1.9~2.5 times of 3 width of welding.
When cell piece back electrode actual production, if traditional back electrode 6 be rectangle structure, width be 1.4~
1.6mm, then improved 6 transverse width of back electrode is 1.96~2.56mm.It is corresponding in order not to increase cost, in entire slurry
In the case that dosage is constant, the longitudinal length of back electrode 6 is reduced.
When back electrode 6 is irregular shape, such as localized contact electrode, localized contact electrode is arranged in electricity with array pattern
The pond back side.Array pattern is one-dimensional, two-dimentional geometric figure or one-dimensional and two-dimentional geometric figure combination, one-dimensional geometric figure choosing
From: line segment, camber line or grid line shape；Two-dimentional geometric figure is selected from: circle, spindle, annular, polygon or sector.
The load performance of photovoltaic module is an important indicator for evaluating assembly property, generally passes through mechanical load reliability
Test obtains to characterize particular by the variation of component power after test weight bearing.It is negative that solar photovoltaic assembly is subjected to sandbag etc.
Deformation occurs for meeting after weight, and deformation process can be broken with solar battery sheet, and cell piece, which is crushed quantity, excessively will lead to photovoltaic group
The decline of part power, and then show as load test failure.
Such as: 72 type list glass PERC component of existing market, using Bom1 (aluminium 45mm*35mm& glass 4.0mm), or
Use Bom2 (aluminium 40mm*35mm& glass 3.2mm), corresponding cost bigger from scantling, that is, visible Bom1 material consumption
It is higher.But the problem that the program is not high there are still reliability test percent of pass.Relevant experimental data shows to carry when Bom2 is corresponding
When lotus percent of pass is below 20%, using Bom1 load percent of pass 50% or so；Another aspect, since material increase is led
The cost increase of cause also necessarily has a negative impact to product synthesized competitiveness.
As shown in figure 4, the utility model is improved 6 innings of battery back electrode by optimization back electrode of solar cell 6
Portion's pressure while especially by 6 slurry usage amount of back electrode is not increased, increases the width of battery back electrode 6, so that welding welds
More stable, weld strength increase is contacted, and then enhances the carrying of cell piece regional area, promotes corresponding photovoltaic module product
Load performance.Especially in the case where not increasing by 6 slurry usage amount of back electrode, this method makes the cost of manufacture of battery not
Become.
As shown in figure 5, the utility model additionally provides a kind of PERC battery component, comprising: PERC cell piece 1 and welding 3,
Back electrode 6 on adjacent PERC cell piece forms series connection by the connection of welding 3, and the back electrode 6 of PERC cell piece 1 meets: back electricity
The effective width of pole 6 and 3 vertical direction of welding is 1.9~2.5 times of 3 width of welding.
For the width requirement of irregular back electrode 6: the effective width of back electrode 6 and 3 vertical direction of welding is that welding 3 is wide
1.9~2.5 times of degree.Here the effective width of back electrode 6 refers to the minimum widith with 3 vertical direction of welding.
The utility model improves 6 local pressure of battery back electrode by the design of optimization back electrode of solar cell 6, thus
Enhance the carrying of cell piece regional area, and then promotes the load performance of corresponding photovoltaic module product.
By it is broken to the low EL picture analyzing cell piece of mechanical load performance be much to be initiated from back electrode 6, by into
The analysis of one step finds the case where module backside welding is often partially welded, and welding had not only touched back electrode 6 but also touched back at this time
Aluminium, load test is easy to cause cell piece broken in the case of this welding contact, and appropriate improvement 6 width of back electrode can be to avoid weldering
The case where band is partially welded promotes 6 region local strength of back electrode, and then promotes the mechanical load performance of product.
The utility model is partially welded by the optimization design of back electrode of solar cell 6 to improve battery back electrode 6, to enhance
The carrying of cell piece regional area, and then promote the load performance of corresponding photovoltaic module product.
It is tested by load performance, it is as follows to obtain related experiment demonstration:
Table 1
| Back electrode width | Cell piece crack quantity | Component power decaying |
| 2.2mm | 16 | 1.15% |
| 2.6mm | 5 | 0.37% |
| 3.0mm | 3 | 0.15% |
By the application it can be seen from upper table 1 by way of optimizing 6 width of back electrode, component is greatly improved
The load performance of product；The feature of its method maximum is not need to increase additional cost.
The above embodiments are only for explaining the technical ideas and features of the present invention, is a kind of preferred embodiment, mesh
Be that person skilled in the art can understand the content of the utility model and implement accordingly, this reality can not be limited with this
With novel protection scope.Equivalent transformation or modification made by all principles according to the present utility model should all be covered practical at this
Within novel protection scope.
In addition, the above embodiment of the utility model is example, have described in claims with the utility model
Technical idea be allowed to identical method and play the technical solution of identical function and effect, be all contained in the utility model.
Claims (5)
1. a kind of PERC battery component characterized by comprising PERC cell piece (1) and welding (3), adjacent PERC cell piece
On back electrode (6) series connection is formed by welding (3) connection, the back electrode (6) of PERC cell piece (1) meets: back electrode (6) with
The effective width of welding (3) vertical direction is 1.9~2.5 times of welding (3) width.
2. a kind of PERC battery component according to claim 1, which is characterized in that described PERC cell piece (1) back side
It is provided with discontinuous back electrode (6), back electrode (6) effective width is not less than 1.8mm.
3. a kind of PERC battery component according to claim 1, which is characterized in that the back electrode (6) is that part connects
Touched electrode, localized contact electrode are arranged in cell backside with array pattern.
4. a kind of PERC battery component according to claim 3, which is characterized in that array pattern is one-dimensional, two-dimensional geometry
Figure or one-dimensional and two-dimentional geometric figure combination, one-dimensional geometric figure are selected from: line segment, camber line or grid line shape；Two-dimensional geometry figure
Shape is selected from: circle, spindle, annular, polygon or sector.
5. a kind of PERC battery component according to claim 1, which is characterized in that effective width of the back electrode (6)
Degree refers to and the minimum widith in back electrode (6) perpendicular direction of arranged direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821909544.XU CN209056505U (en) | 2018-11-19 | 2018-11-19 | A kind of PERC battery component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821909544.XU CN209056505U (en) | 2018-11-19 | 2018-11-19 | A kind of PERC battery component |
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| Publication Number | Publication Date |
|---|---|
| CN209056505U true CN209056505U (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821909544.XU Active CN209056505U (en) | 2018-11-19 | 2018-11-19 | A kind of PERC battery component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009585A (en) * | 2019-10-17 | 2020-04-14 | 晋能清洁能源科技股份公司 | Four-segment back electrode back electric field screen printing plate |
-
2018
- 2018-11-19 CN CN201821909544.XU patent/CN209056505U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009585A (en) * | 2019-10-17 | 2020-04-14 | 晋能清洁能源科技股份公司 | Four-segment back electrode back electric field screen printing plate |
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