CN102707213A - Detection method for failure of encapsulated cells - Google Patents
Detection method for failure of encapsulated cells Download PDFInfo
- Publication number
- CN102707213A CN102707213A CN2012101417963A CN201210141796A CN102707213A CN 102707213 A CN102707213 A CN 102707213A CN 2012101417963 A CN2012101417963 A CN 2012101417963A CN 201210141796 A CN201210141796 A CN 201210141796A CN 102707213 A CN102707213 A CN 102707213A
- Authority
- CN
- China
- Prior art keywords
- battery sheet
- assembly
- voltage
- current
- test
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Classifications
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a detection method for failure of encapsulated cells. The detection method comprises the following steps: a) judging the abnormal type of an assembly according to the I-V curve of the assembly; b) if the assembly has abnormality caused by the current problem according to judgment of the I-V curve of the assembly, judging the position of suspected failed cell through EL test, testing the current of the suspected failed cell and the adjacent cell, and judging whether the tested cell has current failure according to current critical value Im; c) if the assembly has abnormality caused by the voltage problem according to the judgment of the I-V curve of the assembly, carrying out segmental measurement on each string in the assembly, finding out a low-voltage part, then testing the voltage of the cells at the low-voltage part one by one, and judging whether the tested cell has voltage failure according to the voltage critical value Vm. The detection method has the beneficial effect of fast judging the failure type of the encapsulated cell according to demand of users, and ensuring that the electric property of the assembly can meet the requirements of customers.
Description
Technical field
The present invention relates to a kind of detection method that back battery sheet lost efficacy that encapsulates.
Background technology
Along with the aggravation of market competition, the client requires increasingly highly to assembly quality, and on the instrument that characterizes the assembly inherent quality, EL (electroluminescence) test often is known as the eyes of photovoltaic module, is used to check the microdefect of assembly, reduces the risk of omission.
Summary of the invention
Technical matters to be solved by this invention is: a kind of detection method that back battery sheet lost efficacy that encapsulates is provided, can combines customer requirement, judge whether the battery sheet after the packing lost efficacy.
The technical solution adopted for the present invention to solve the technical problems is: a kind of detection method that encapsulates back battery sheet inefficacy has following steps:
A) according to the I-V curve determination component Exception Type of assembly, be current problems cause unusual, still voltage problem cause unusually;
B) if judge according to assembly I-V curve; There is unusual that current problems causes in assembly; Assembly is judged the position of doubtful dead battery sheet by the EL test; Test the electric current of doubtful dead battery sheet and adjacent cell sheet; Whether electric current lost efficacy to declare the battery sheet of testing according to current critical value Im, and the electric current of battery sheet is greater than Im, and the battery sheet is normal; The electric current of battery sheet is less than Im, and battery sheet electric current lost efficacy;
C) if judge according to assembly I-V curve; There is unusual that voltage problem causes in assembly; Every string in the assembly carries out areal survey; Find out voltage part on the low side, find out after the voltage part on the low side the voltage of the battery sheet of test voltage part on the low side piecewise, judge the whether voltage inefficacy of the battery sheet test according to charge threshold level Vm; The voltage of battery sheet is greater than Vm; The battery sheet is normal, and the voltage of battery sheet is less than Vm, and battery sheet voltage lost efficacy;
The method that obtains Im and Vm is: at first with the battery sheet of efficient section irradiation under equal light source condition, test is in its operate as normal and when reaching the lowest power Pm of customer demand, current corresponding value Im and magnitude of voltage Vm, with Im and Vm as critical value.
For better embodying the actual working environment of actual battery sheet, during test lowest power Pm, the setting range of irradiance is 700 ~ 1000wm/cm2.
The invention beneficial effect is: judge the failure type after the cell package fast according to customer demand, guarantee that the electrical component performance satisfies customer requirement.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the I-V curve map of assembly;
Fig. 2 is an assembly EL test pattern synoptic diagram;
Embodiment
The I-V curve abnormality of assembly directly influences the output electric property ability of assembly, investigates unusual reason fast, can reduce the encapsulation loss of assembly and the not matching property of electric current of reduction battery sheet, reduces time and difficulty that assembly is reprocessed.According to the equivalent-circuit model of solar cell, can be approximated to be straight line near near the curve the VOC, the slope of this straight line is Rs, also can be approximated to be straight line near near the curve the Isc, and the slope of this straight line is Rsh, and expression formula is following:
I=0;
Like Fig. 1 is the I-V curve of assembly and corresponding Pm, Im, Vm, is approximate constant current source section in the Pm left side, and the right side is approximately the constant pressure source section, and curve 1 can be regarded as unusually by current problems and causes unusually, and curve 2 can be regarded as by voltage problem and causes unusually.Pm=Im*Vm, Pm are peak power output, and Im and Vm are respectively peak power output point current corresponding and voltage;
If judge based on assembly I-V curve; There is unusual that current problems (curve one problem) causes in assembly; In the position of judging the dead battery sheet based on EL test, i.e. dark-coloured position among Fig. 2 connects the both positive and negative polarity binding post of tester the both positive and negative polarity of battery sheet; Carry out current measurement, confirm the type that the battery sheet lost efficacy based on reference contrast form;
If judge according to assembly I-V curve; There is unusual that voltage problem (curve two problems) causes in assembly; The both positive and negative polarity of the both positive and negative polarity connection terminal of tester connection battery strings, adopt component tester earlier the every string in the assembly to be carried out areal survey, find out voltage part on the low side; Confirm the type that the battery sheet lost efficacy according to reference contrast form, failure type is: voltage lost efficacy and electric current lost efficacy two kinds.
Reference contrast form:
The making of this form; At first with the battery sheet of efficient section irradiation under equal light source condition, the setting range of irradiance is 700 ~ 1000wm/cm2, and test is in its operate as normal and when reaching the lowest power Pm of customer demand; Current corresponding value Im and magnitude of voltage Vm, with Im and Vm as critical value.
For example: the lowest power of customer demand is 4.05 (7.95*0.51), and reference contrast form is:
Claims (2)
1. one kind encapsulates the detection method that back battery sheet lost efficacy, and it is characterized in that: have following steps:
A) according to the I-V curve determination component Exception Type of assembly, be current problems cause unusual, still voltage problem cause unusually;
B) if judge according to assembly I-V curve; There is unusual that current problems causes in assembly; Assembly is judged the position of doubtful dead battery sheet by the EL test; Test the electric current of doubtful dead battery sheet and adjacent cell sheet; Whether electric current lost efficacy to declare the battery sheet of testing according to current critical value Im, and the electric current of battery sheet is greater than Im, and the battery sheet is normal; The electric current of battery sheet is less than Im, and battery sheet electric current lost efficacy;
C) if judge according to assembly I-V curve; There is unusual that voltage problem causes in assembly; Every string in the assembly carries out areal survey; Find out voltage part on the low side, find out after the voltage part on the low side the voltage of the battery sheet of test voltage part on the low side piecewise, judge the whether voltage inefficacy of the battery sheet test according to charge threshold level Vm; The voltage of battery sheet is greater than Vm; The battery sheet is normal, and the voltage of battery sheet is less than Vm, and battery sheet voltage lost efficacy;
The method that obtains Im and Vm is: at first with the battery sheet of efficient section irradiation under equal light source condition, test is in its operate as normal and when reaching the lowest power Pm of customer demand, current corresponding value Im and magnitude of voltage Vm, with Im and Vm as critical value.
2. the detection method that encapsulation according to claim 1 back battery sheet lost efficacy is characterized in that: during test lowest power Pm, the setting range of irradiance is 700 ~ 1000wm/cm2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210141796.3A CN102707213B (en) | 2012-05-08 | 2012-05-08 | Detection method for failure of encapsulated cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210141796.3A CN102707213B (en) | 2012-05-08 | 2012-05-08 | Detection method for failure of encapsulated cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102707213A true CN102707213A (en) | 2012-10-03 |
| CN102707213B CN102707213B (en) | 2015-01-21 |
Family
ID=46900143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210141796.3A Active CN102707213B (en) | 2012-05-08 | 2012-05-08 | Detection method for failure of encapsulated cells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102707213B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218890A (en) * | 2013-06-03 | 2014-12-17 | 独立行政法人产业技术综合研究所 | I-v characteristic measuring apparatus and i-v characteristic measuring method for solar cell |
| CN107689771A (en) * | 2017-08-15 | 2018-02-13 | 华电电力科学研究院 | Photovoltaic module failure diagnosis tool and method |
| CN109557479A (en) * | 2017-09-25 | 2019-04-02 | 沃尔缇夫能源系统公司 | A kind of localization method, the apparatus and system of over-voltage power module |
| CN110855241A (en) * | 2019-12-04 | 2020-02-28 | 合肥阳光新能源科技有限公司 | Photovoltaic system fault diagnosis method and device |
| CN116699428A (en) * | 2023-08-08 | 2023-09-05 | 深圳市杰成镍钴新能源科技有限公司 | Defect detection method and device for retired battery |
| JP7425444B2 (en) | 2020-07-15 | 2024-01-31 | 株式会社トーエネック | Power generation performance evaluation device, power generation performance evaluation method, and program |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008096771A1 (en) * | 2007-02-08 | 2008-08-14 | Panasonic Ev Energy Co., Ltd. | Device and method for detecting abnormality of electric storage device |
| CN101976698A (en) * | 2009-10-30 | 2011-02-16 | 浙江正泰太阳能科技有限公司 | Method for positioning and repairing defective cell in I-V curve abnormal solar cell module |
-
2012
- 2012-05-08 CN CN201210141796.3A patent/CN102707213B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008096771A1 (en) * | 2007-02-08 | 2008-08-14 | Panasonic Ev Energy Co., Ltd. | Device and method for detecting abnormality of electric storage device |
| CN101976698A (en) * | 2009-10-30 | 2011-02-16 | 浙江正泰太阳能科技有限公司 | Method for positioning and repairing defective cell in I-V curve abnormal solar cell module |
Non-Patent Citations (3)
| Title |
|---|
| 《百度文库》 20100410 rocketwolf 组件测试曲线异常分析 2 , * |
| ROCKETWOLF: "组件测试曲线异常分析", 《百度文库》, 10 April 2010 (2010-04-10), pages 1 - 2 * |
| 孔凡建: "太阳电池组件I-V特性曲线异常", 《电源技术》, vol. 34, no. 2, 28 February 2010 (2010-02-28), pages 181 - 185 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218890A (en) * | 2013-06-03 | 2014-12-17 | 独立行政法人产业技术综合研究所 | I-v characteristic measuring apparatus and i-v characteristic measuring method for solar cell |
| CN107689771A (en) * | 2017-08-15 | 2018-02-13 | 华电电力科学研究院 | Photovoltaic module failure diagnosis tool and method |
| CN107689771B (en) * | 2017-08-15 | 2024-04-16 | 华电电力科学研究院 | Photovoltaic module fault diagnosis tool and method |
| CN109557479A (en) * | 2017-09-25 | 2019-04-02 | 沃尔缇夫能源系统公司 | A kind of localization method, the apparatus and system of over-voltage power module |
| CN110855241A (en) * | 2019-12-04 | 2020-02-28 | 合肥阳光新能源科技有限公司 | Photovoltaic system fault diagnosis method and device |
| JP7425444B2 (en) | 2020-07-15 | 2024-01-31 | 株式会社トーエネック | Power generation performance evaluation device, power generation performance evaluation method, and program |
| CN116699428A (en) * | 2023-08-08 | 2023-09-05 | 深圳市杰成镍钴新能源科技有限公司 | Defect detection method and device for retired battery |
| CN116699428B (en) * | 2023-08-08 | 2023-10-10 | 深圳市杰成镍钴新能源科技有限公司 | Defect detection method and device for retired battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102707213B (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102707213A (en) | Detection method for failure of encapsulated cells | |
| WO2009067526A3 (en) | High-efficiency, high current solar cell and solar module | |
| WO2013058558A3 (en) | Battery pack with improved safety | |
| CN103308847A (en) | Testing system for battery protection board and testing method thereof | |
| WO2010057216A3 (en) | Integrated bypass diode assemblies for back contact solar cells and modules | |
| CN104505412B (en) | A solar cell module having a topological structure | |
| CN102843022A (en) | System and method for suppressing repeat start of photovoltaic inverter | |
| CN102354913A (en) | Intelligent photovoltaic header box and manufacturing method thereof | |
| CN103063927A (en) | Earth impedance detecting circuit and method of photovoltaic inverter | |
| CN104362976B (en) | It is a kind of to utilize the method for covering method detection photovoltaic generating system trouble point | |
| CN203299293U (en) | Testing system for battery protective plates | |
| CN110729213A (en) | Final test method and automatic detection device for intelligent photovoltaic module | |
| CN104049161A (en) | Testing connecting structure and testing method for substation field lightning arrester without demounting primary high-voltage lead | |
| CN202395480U (en) | Lithium battery protection plate with balance display function | |
| CN101806863B (en) | Insulation detection system and detection method for power battery | |
| CN204045607U (en) | A kind of solar module with integrated optimization device | |
| CN202424109U (en) | Electric protection module | |
| CN104062595A (en) | Method for detecting failure of lead-acid storage battery | |
| CN104485875A (en) | Failure analysis method for judging failed photovoltaic component and photovoltaic component structure using failure analysis method | |
| CN104007319B (en) | Method for measuring equivalent parallel-connection resistance value of multi-junction concentrating solar battery | |
| CN102323510A (en) | Rapid and reliable flat cable assembly detection device | |
| CN103744029B (en) | A kind of evaluation method based on internal resistance measurement cell residual capacity | |
| CN201927622U (en) | Novel photovoltaic junction box | |
| CN102590725A (en) | Method for detecting and judging occurrence of polarization phenomenon of solar cell | |
| CN107978812A (en) | Temperature of powered cell voltage acquisition plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213031, No. 2, Tianhe Road, Xinbei Industrial Park, Jiangsu, Changzhou Patentee after: TRINA SOLAR Co.,Ltd. Address before: 213031, No. 2, Tianhe Road, Xinbei Industrial Park, Jiangsu, Changzhou Patentee before: trina solar Ltd. Address after: 213031, No. 2, Tianhe Road, Xinbei Industrial Park, Jiangsu, Changzhou Patentee after: trina solar Ltd. Address before: 213031, No. 2, Tianhe Road, Xinbei Industrial Park, Jiangsu, Changzhou Patentee before: CHANGZHOU TRINA SOLAR ENERGY Co.,Ltd. |