IEC63202-1 晶体硅太阳电池初始光致衰减测试方法

| Company | Presentation Title I Date www.jinkosolar.com IEC63202-1 PHOTOVOLTAIC CELLS – Part 1: Measurements of light-induced degradation of crystalline silicon solar cells 2 OUTLINE Progress updates Revision presentation Collection of comments 3 IEC63202-1 key facts ◆ 2017 August-September, feedbacks from local and international committees received. ◆ CDV submitted in April 2018 ◆ Results and comments received in August 2018 ◆ Latest improved version completed and discussed during Oct Busan IEC TC 82 meeting 2018 August voting results Editorial comments: 35 (all accepted) Technical comments: 16 (revised accordingly) Approval Criteria Result P-Members voting: 25 P-Members in favour: 23 = 92% =66.7% APPROVED Total votes cast: 28 Total against: 2 = 7.1% =25% APPROVED Final Decision: APPROVED 5 Methodology and Outcomes 4.4 4.42 4.44 4.46 4.48 4.5 4.52 4.54 4.56 4.58 4.6 0 5 6 7 8 9 10 11 Pm p(W) Exposure Dose(kWh/m2) Cells Temperature at 60± 5℃ 1 2 3 4 5 6 7 8 Revision details: General changes 1. New ID: 63202-1 2. Add Section 3 “Terms and definitions”, more reference documents 3. Wording improvement through the documents 4. Term “solar cell” convert into “PV cell” 5. Extra requirements for the test report Revision details: description clarification Scope section changes CDV LID magnitude is one important factor of cell quality. However, it is not recommend using it as the sole determination factor. For example, compared to LID magnitude, quasi-stabilized Imp and Pmp, along with their distributions, affect more directly to module quality. Revision LID magnitude is one important factor of cell quality. For cells from the same sorting bin, the most important factor is the distribution of output power after LID. Comments regarding sample storage It is not clear when the cells are to be stored in a dark container. Immediately after what? It has been revised as “Selected solar cells shall be stored in a sealed and dark container immediately after I-V measurements to minimize the ambient light exposure.” What temperature should the cells be held at during storage? Document has been revised as ”It is recommended to conduct the test without time delay between cycles; otherwise, put the samples at room temperature (25± 5 °C) in a dark container, which is sealed or with nitrogen gas purging.” Revision details: extra requirements for the test report Comments asking for more detailed report More details about where the cells camefrom should be included in the test report if they are to serve as a basis for moduledesign. Section 7 e) requests the cells’ details. The document has been further revised as “e)Description and identification of the item tested, including the specimen size, testing cells details such as their origin and pedigree” Should add some detail about themeasurement uncertainly. section 7 l) requires the report to provide the “A statement of the estimated uncertainty of the test results, where relevant.”The uncertainty of the measurements depends on many factors, such as the measurement tools, sampling principles, cell structures and so on. It is very difficult to provide an estimation of the test uncertainty for all scenarios. Just having a list of LID values is not particularlyinteresting. What is of more value is to perform some statistics on the data. The standardshould at least ask for standard deviations, ranges, etc so that someone looking at the testreport can get an idea of the distribution of results. The section 7 m) has been added to clarify this: “A statistical analysis of the experimental data, when requested.” However, due to the small specimen size, it is considered not compulsory for all users. Revision details Comment 3 different types of apparatus are now mentioned to be required, a AAA solar simulator for performance measurements at STC, an environmental chamber and a BBB solar simulator for light soaking in between IV tests. In the worst case, this would mean walking back and forth with the solar cell between different test setups as much as 15 times, which is labour intensive and error sensitive. For solar cells, there are plenty AAA lightsoakers with temperature control for 25 °C to 60 °C available in the market that would completely avoid this problem. Suggest to add the option of using such a setup 用带控温功能的 IV 测试仪来完成 LID 测试实验 Response We believe the suggestion mentioned here is not ideal. Multiple samples are used for the test and the distribution of output power after LID is critical. Therefore, to make sure that all samples are treated under the same conditions is very important. While using the IV tester to perform both the IV testing and the irradiance exposure would cause large variations due to the individual and inaccurate temperature control history. Here an environmental chamber is strongly suggested to guarantee the conditions described in this standard can be well replicated by the users. Revision details Comment Why should 3 seconds be enough to guarantee temperature returning to pre-exposure value? Response The project team has investigated most of the available I-V testers in the market, and all of the them guarantees that test cells temperature can recover within 3 seconds. As a result. 3 seconds is used to make sure of that. However, for those old type testers or customized tools, slightly longer rest time might be required, where the description “to allow the cell temperature to recover to its initial value” needs to be followed. Thanks for contributions from all working group members and PV experts