CN103618500A - Testing and grading method for crystalline silicon solar cell - Google Patents

Testing and grading method for crystalline silicon solar cell Download PDF

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Publication number
CN103618500A
CN103618500A CN201310488940.5A CN201310488940A CN103618500A CN 103618500 A CN103618500 A CN 103618500A CN 201310488940 A CN201310488940 A CN 201310488940A CN 103618500 A CN103618500 A CN 103618500A
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CN
China
Prior art keywords
battery
efficiency
impp
cell piece
electric current
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Pending
Application number
CN201310488940.5A
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Chinese (zh)
Inventor
徐华浦
陈康平
金浩
蒋方丹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jinko Solar Co Ltd
Jinko Solar Co Ltd
Original Assignee
Zhejiang Jinko Solar Co Ltd
Jinko Solar Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Zhejiang Jinko Solar Co Ltd, Jinko Solar Co Ltd filed Critical Zhejiang Jinko Solar Co Ltd
Priority to CN201310488940.5A priority Critical patent/CN103618500A/en
Publication of CN103618500A publication Critical patent/CN103618500A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention relates to a testing and grading method for a crystalline silicon solar cell. The method includes testing and segmenting of battery efficiency and testing and grading of a battery working current. Battery pieces with a battery efficiency deviation <= delta e are classified into a same efficiency segment; battery pieces with the battery working current of an Impp + /- delta I are classified; battery pieces which are >= an Impp - delta I and also <= an Impp are classified into a same grade; and battery pieces which are > an Impp and also <= an Impp + delta I are classified into another grade. The delta e value ranges from 0.05% to 0.2%; the Impp value ranges from 7.500A to 9.000A; and the delta I value ranges from 0.030A to 0.080A. The method of the invention can effectively test and grade the battery, so that the performance of the cell unit in series connection with the structural component is quite consistent; the power loss caused by mismatch of the battery unit is reduced; the package loss from the battery to the component is reduced; and the output from the battery to the component is improved.

Description

A kind of method of crystal silicon solar batteries test stepping
Technical field
The invention belongs to photovoltaic technology field, particularly relate to a kind of method of crystal silicon solar batteries test stepping.
Background technology
At present, crystal silicon solar batteries market is all according to the power of the assembly lattice of fixing a price, and high power assembly just becoming the main flow in market, and the power that improves assembly has become the research direction of manufacturing enterprise, and Zhe Yejiangwei manufacturing enterprise directly brings interests.In order to obtain required current/voltage and power output, simultaneously also in order to protect battery not suffer mechanical damage and environmental nuisance, cell piece series connection or parallel connection must be packaged into assembly.Under general condition, the power output of the assembly after encapsulation all can be less than theoretical component power, is conventionally referred to as encapsulation loss.And the factor that affects component package loss is a lot, comprise cell piece stepping mode, component package material, packaging technology and mating of cell piece technique etc., by optimizing these aspects, can reduce the encapsulation of assembly and lose.
The encapsulation loss of assembly is inevitably, importantly goes to reduce encapsulation loss as far as possible.If can reduce the encapsulation loss of assembly, the power of assembly correspondingly will increase so, will bring income.Because the operation principle of most of assembly is the cascaded structure of battery, and this just needs the operating current of battery to approach to mate, and so just can avoid not mating of assembly, and causes component package loss larger.
Common assembly is all to adopt battery series connection form, if sneak into low current battery in the normal battery of series connection, so according to electric current minimum principle, the output current of assembly is just determined by minimum electric current, the power output of assembly can reduce, and the encapsulation loss of assembly can become large.Reduce battery match penalties and obtain maximum power output, need to select the battery strings of identical or close unit for electrical property parameters to be unified into assembly.
Solve the unmatched problem of battery unit in assembly, just need to different cell pieces be retested, and test stepping according to suitable rule, thereby cell piece is divided into dissimilar group, carry out respectively again establishment of component, just can reach good component power output.
Summary of the invention
The object of the invention is to provide a kind of method of crystal silicon solar batteries test stepping, by test stepping, then carries out respectively establishment of component by stepping, realizes battery component coupling, reduces encapsulation loss.
The present invention realizes the technical scheme taked of innovation object, a kind of method of crystal silicon solar batteries test stepping, and it comprises battery efficiency test and by battery efficiency segmentation and battery operated testing current and by battery operated electric current stepping step;
The test of described battery efficiency is also segmented into by battery efficiency: cell piece is carried out to battery efficiency test, and carries out battery efficiency segmentation according to test gained battery efficiency, by battery efficiency poor≤δ ecell piece be divided into same efficiency section; Described δ espan be 0.05%~0.2%;
Described battery operated testing current by battery operated electric current stepping is also: each efficiency section cell piece through battery efficiency segmentation is carried out to battery operated testing current, and getting the battery operated electric current of test gained is Impp ± δ icell piece carry out battery operated electric current stepping, by battery operated electric current>=Impp-δ iand the cell piece of≤Impp is divided into same shelves, by battery operated electric current > Impp and≤Impp+ δ icell piece be divided into another shelves; The span of described Impp is 7.500A~9.000A, described δ ispan be 0.030A~0.080A.
As a kind of preferred, described δ espan be 0.1%.
As a kind of preferred, the span of described Impp is 8.000A~8.500A, described δ ispan be 0.030A~0.050A.
In the present invention, δ econventionally according to the concrete efficiency numerical value of stepping to be tested batch cell piece distribution situation, in its span, set.Impp refers to the battery recommended current of the cell piece of corresponding efficiency section, Impp and δ iaccording to the concrete battery operated current values distribution situation of stepping efficiency section cell piece to be tested, in its span, set.
The present invention breaks through traditional efficiency stepping, adopts the simultaneously preferential principle of efficiency and operating current Impp, realizes stepping refinement.According to the requirement to assembly, first cell piece is carried out battery efficiency test and carries out segmentation by battery efficiency, then each efficiency section cell piece is carried out respectively battery operated testing current and carries out stepping by battery operated electric current.By segmentation, in same shelves, the Performance Ratio of cell piece is more consistent, and not only battery efficiency is more approaching, and battery operated electric current is also more approaching.In the present invention, be divided into the poor less (δ of battery efficiency of the cell piece of same efficiency section e), that is battery efficiency consistency is higher; And the cell piece of same efficiency section is carried out to the stepping of battery operated electric current again, therefore, further, be divided into the less (δ of battery operated difference between current of the cell piece of same shelves i), that is the consistency of battery operated electric current is higher.Therefore in same shelves, the mutual matching degree of cell piece improves greatly, and the interior cell piece of same shelves of take is battery unit packaged battery assembly, and encapsulation loss is little.
The progress of the technology of the present invention is to set up the test stepping method of crystal silicon solar batteries, thereby battery is effectively tested to stepping, make the Performance Ratio of battery unit of cascaded structure assembly more consistent, thereby the power loss that reduces battery unit not mate and cause, and then reduce battery to the encapsulation loss of assembly, improve battery to the output of assembly.By the present invention, can make same battery sheet improve 0.5W-1W to the power output of assembly.
Embodiment
embodiment 1:
A collection of fillet 156 single crystal battery sheets are carried out to battery efficiency test, choose battery efficiency and be 18.4%~18.6% cell piece and carry out battery efficiency segmentation.Set δ e=0.1%, be about to battery efficiency poor≤0.1% cell piece is divided into same efficiency section.Specifically by battery efficiency >=18.4% and≤18.5% cell piece is divided into the first efficiency section, by battery efficiency > 18.5% and≤18.6% cell piece is divided into the second efficiency section.
The first efficiency section cell piece is carried out to battery operated testing current, set battery recommended current Impp=8.300A, δ i=0.050A, be about to battery operated electric current>=8.300A-0.050A and≤cell piece of 8.300A is divided into first grade of the first efficiency section, by battery operated electric current > 8.300A and≤cell piece of 8.300A+0.050A is divided into the first efficiency section second gear.
The second efficiency section cell piece is carried out to battery operated testing current, set battery recommended current Impp=8.400A, δ i=0.050A, be about to battery operated electric current>=8.400A-0.050A and≤cell piece of 8.400A is divided into first grade of the second efficiency section, by battery operated electric current > 8.400A and≤cell piece of 8.400A+0.050A is divided into the second efficiency section second gear.
According to the method described above, by this batch of fillet 156 single crystal battery built-in testings and be divided into fourth gear, be respectively:
The first first grade of efficiency section: battery efficiency >=18.4% and≤18.5%, battery operated electric current >=8.300A-0.050A and≤8.300A;
The first efficiency section second gear: battery efficiency >=18.4% and≤18.5%, battery operated electric current > 8.300A and≤8.300A+0.050A;
The second first grade of efficiency section: battery efficiency > 18.5% and≤18.6%, battery operated electric current >=8.400A-0.050A and≤8.400A;
The second efficiency section second gear: battery efficiency > 18.5% and≤18.6%, battery operated electric current > 8.400A and≤8.400A+0.050A.
Above-mentioned each grade of cell piece made respectively assembly, and encapsulation loss is little.
embodiment 2:
A collection of right angle 156 polycrystalline cell pieces are carried out to battery efficiency test, choose battery efficiency and be 17.4%~17.6% cell piece and carry out battery efficiency segmentation.Set δ e=0.1%, be about to battery efficiency poor≤0.1% cell piece is divided into same efficiency section.Specifically by battery efficiency >=17.4% and≤17.5% cell piece is divided into the first efficiency section, by battery efficiency > 17.5% and≤17.6% cell piece is divided into the second efficiency section.
The first efficiency section cell piece is carried out to battery operated testing current, set battery recommended current Impp=8.100A, δ i=0.030A, be about to battery operated electric current>=8.100A-0.030A and≤cell piece of 8.100A is divided into first grade of the first efficiency section, by battery operated electric current > 8.100A and≤cell piece of 8.100A+0.030A is divided into the first efficiency section second gear.
The second efficiency section cell piece is carried out to battery operated testing current, set battery recommended current Impp=8.150A, δ i=0.030A, be about to battery operated electric current>=8.150A-0.030A and≤cell piece of 8.150A is divided into first grade of the second efficiency section, by battery operated electric current > 8.150A and≤cell piece of 8.150A+0.030A is divided into the second efficiency section second gear.
According to the method described above, by this batch of fillet 156 single crystal battery built-in testings and be divided into fourth gear, be respectively:
The first first grade of efficiency section: battery efficiency >=17.4% and≤17.5%, battery operated electric current >=8.100A-0.030A and≤8.100A;
The first efficiency section second gear: battery efficiency >=17.4% and≤17.5%, battery operated electric current > 8.100A and≤8.100A+0.030A;
The second first grade of efficiency section: battery efficiency > 17.5% and≤17.6%, battery operated electric current >=8.150A-0.030A and≤8.150A;
The second efficiency section second gear: battery efficiency > 17.5% and≤17.6%, battery operated electric current > 8.150A and≤8.150A+0.030A.
Above-mentioned each grade of cell piece made respectively assembly, and encapsulation loss is little.

Claims (3)

1. a method for crystal silicon solar batteries test stepping, is characterized in that, comprises battery efficiency test and by battery efficiency segmentation and battery operated testing current and by battery operated electric current stepping step;
The test of described battery efficiency is also segmented into by battery efficiency: cell piece is carried out to battery efficiency test, and carries out battery efficiency segmentation according to test gained battery efficiency, by battery efficiency poor≤δ ecell piece be divided into same efficiency section; Described δ espan be 0.05%~0.2%;
Described battery operated testing current by battery operated electric current stepping is also: each efficiency section cell piece through battery efficiency segmentation is carried out to battery operated testing current, and getting the battery operated electric current of test gained is Impp ± δ icell piece carry out battery operated electric current stepping, by battery operated electric current>=Impp-δ iand the cell piece of≤Impp is divided into same shelves, by battery operated electric current > Impp and≤Impp+ δ icell piece be divided into another shelves; The span of described Impp is 7.500A~9.000A, described δ ispan be 0.030A~0.080A.
2. the method for crystal silicon solar batteries test stepping according to claim 1, is characterized in that described δ espan be 0.1%.
3. the method for crystal silicon solar batteries test stepping according to claim 1, is characterized in that, the span of described Impp is 8.000A~8.500A, described δ ispan be 0.030A~0.050A.
CN201310488940.5A 2013-10-18 2013-10-18 Testing and grading method for crystalline silicon solar cell Pending CN103618500A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105609442A (en) * 2015-12-28 2016-05-25 光为绿色新能源股份有限公司 Novel test and grading method for crystal silicon solar cell
CN106098851A (en) * 2016-08-01 2016-11-09 芜湖格利特新能源科技有限公司 A kind of stepping method of crystal silicon solar energy battery
CN106129180A (en) * 2016-08-01 2016-11-16 芜湖格利特新能源科技有限公司 A kind of manufacturing process of crystal silicon solar energy battery
CN108735860A (en) * 2018-05-30 2018-11-02 浙江晶科能源有限公司 A kind of solar cell module and preparation method thereof
CN109347438A (en) * 2018-09-27 2019-02-15 苏州润阳光伏科技有限公司 A kind of test method of imbrication battery
CN111010086A (en) * 2019-12-06 2020-04-14 英利能源(中国)有限公司 Battery sorting method and system and terminal equipment

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CN101648186A (en) * 2008-08-12 2010-02-17 中茂电子(深圳)有限公司 Solar wafer classification system provided with moving device of load-bearing devices
CN102185007A (en) * 2010-12-02 2011-09-14 江阴浚鑫科技有限公司 Manufacturing method of solar battery pack
CN202178267U (en) * 2011-08-29 2012-03-28 深圳市金光能太阳能有限公司 Combined solar cell module
CN102544192A (en) * 2010-12-17 2012-07-04 上海山晟太阳能科技有限公司 Production process for photovoltaic cell assembly
CN103178160A (en) * 2013-03-19 2013-06-26 四川钟顺太阳能开发有限公司 Process for manufacturing linear condensation assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101648186A (en) * 2008-08-12 2010-02-17 中茂电子(深圳)有限公司 Solar wafer classification system provided with moving device of load-bearing devices
CN102185007A (en) * 2010-12-02 2011-09-14 江阴浚鑫科技有限公司 Manufacturing method of solar battery pack
CN102544192A (en) * 2010-12-17 2012-07-04 上海山晟太阳能科技有限公司 Production process for photovoltaic cell assembly
CN202178267U (en) * 2011-08-29 2012-03-28 深圳市金光能太阳能有限公司 Combined solar cell module
CN103178160A (en) * 2013-03-19 2013-06-26 四川钟顺太阳能开发有限公司 Process for manufacturing linear condensation assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105609442A (en) * 2015-12-28 2016-05-25 光为绿色新能源股份有限公司 Novel test and grading method for crystal silicon solar cell
CN105609442B (en) * 2015-12-28 2019-02-19 保定光为绿色能源科技有限公司 A kind of method of novel crystal silicon solar batteries test stepping
CN106098851A (en) * 2016-08-01 2016-11-09 芜湖格利特新能源科技有限公司 A kind of stepping method of crystal silicon solar energy battery
CN106129180A (en) * 2016-08-01 2016-11-16 芜湖格利特新能源科技有限公司 A kind of manufacturing process of crystal silicon solar energy battery
CN108735860A (en) * 2018-05-30 2018-11-02 浙江晶科能源有限公司 A kind of solar cell module and preparation method thereof
CN109347438A (en) * 2018-09-27 2019-02-15 苏州润阳光伏科技有限公司 A kind of test method of imbrication battery
CN111010086A (en) * 2019-12-06 2020-04-14 英利能源(中国)有限公司 Battery sorting method and system and terminal equipment

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