GB/T 41203-2021Method for accelerated aging test of PV module encapsulating material (English PDF)
光伏组件封装材料加速老化试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2021
Implementation date
July 1, 2022
Scope
GB/T 41203-2021 is the English-translated version of 光伏组件封装材料加速老化试验方法.
GB/T 41203-2021 describes an accelerated aging test method for the materials used to encapsulate photovoltaic modules: glass, encapsulating adhesive film, backsheets and similar materials.
It specifies the two test chambers, a high pressure cooking aging box and an ultraviolet high temperature and high humidity aging box, and how the glass, film laminate and backsheet samples are prepared.
The test steps run from pretreatment and initial measurements through the pressure cooker (PCT) test and the UV exposure at 85 °C and 85% relative humidity to the measurements repeated after aging.
Results are expressed as the change in solar effective transmittance for glass, the yellowness index difference and peel strength for film, and the retention of elongation at break for backsheets, followed by the test report. It was issued on 31 December 2021 and has applied since 1 July 2022.
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Document preview — GB/T 41203-2021
National Standard of the People's Republic of China
- ICS
- 31.030
- Classification
- L 90
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative references4
- 3 Terms and Definitions4
- 4 Instruments and equipment5
- 4.1 High pressure cooking aging test box5
- 4.2 UV high temperature and high humidity aging test box5
- 5 Sample preparation5
- 6 Test steps6
- 6.1 Sample pretreatment6
- 6.2 Initial performance test6
- 6.3 High pressure cooking test (PCT test)6
- 6.4 Ultraviolet high temperature and high humidity test7
- 6.5 Performance test after aging test7
- 7 Test data processing7
- 8 Test report7
1 Scope
This document describes the accelerated aging test method for photovoltaic module encapsulating materials.
This document is applicable to glass, encapsulating adhesive film, backplane, and other encapsulating materials for photovoltaic modules.
2 Normative references
The following documents contain the provisions which, through normative reference in this document, constitute the essential provisions of this document. For the dated referenced documents, only the versions with the indicated dates are applicable to this document; for the undated referenced documents, only the latest version (including all the amendments) is applicable to this document.
GB/T 1040.3 Plastics -- Determination of tensile properties -- Part 3: Test conditions for films and sheets
GB/T 2790 Adhesives, 180° peel strength test method for a flexible-bonded-to-rigid test specimen assembly
GB/T 31034 Insulating back sheet for crystalline silicon terrestrial photovoltaic (PV) modules
JC/T 2170 Anti-reflective coated glass for photovoltaic modules
ASTM E 313 Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Retention rate
The ratio of the value after the test to the value before the test.
3.2 Yellowness index difference
deltaYI
The difference between the yellowness index YI after the test and the yellowness index YI before the test.
4 Instruments and equipment
4.1 High pressure cooking aging test box
The temperature control accuracy shall be ±0.5 °C, the relative humidity control accuracy shall be ±3%, and the air pressure in the test box shall change with the temperature and humidity.
4.2 UV high temperature and high humidity aging test box
Ultraviolet spectral distribution. 280 nm~400 nm [Middle-wave ultraviolet (UVB) wavelength is 280 nm~320 nm, and long-wave ultraviolet (UVA) wavelength is 320 nm~400 nm]; the irradiation intensity shall meet the ultraviolet irradiation conditions required for the test; the irradiation uniformity shall be better than ±15%; temperature control accuracy shall be ±2.0 °C, and temperature fluctuation shall be <= ±1.0 °C; relative humidity control accuracy shall be ±3%, and relative humidity fluctuation shall be <= ±(3~5)%; effective irradiation area shall be at least 400 mm×300 mm.
5 Sample preparation
5.1 Glass samples for photovoltaic modules. The size should be 300 mm×300 mm, and the number of samples should be 3 pieces.
5.2 Encapsulating adhesive film sample. After stacking the glass, adhesive film, and backplane in sequence, put it into a vacuum laminating machine, and perform curing and crosslinking according to the curing temperature and time required by the product to obtain a laminate. The glass shall be ultra-white patterned glass; the backplane shall have a composite structure; the size of the laminate should be 300 mm×300 mm, and the appearance shall not have obvious bubbles and delamination. The number of samples is 3.
5.3 Photovoltaic backplane samples. They are divided into bare chip samples and laminate samples. After stacking the glass, adhesive film, and backplane in sequence, put it into a vacuum laminating machine, and perform curing and crosslinking according to the curing temperature and time required by the product to obtain a laminate. The glass shall be ultra-white patterned glass.
6 Test steps
6.4 Ultraviolet high temperature and high humidity test
Put the sample into the ultraviolet high temperature and high humidity aging test box, and the test conditions are as follows. the sample's test temperature is 85 °C±2 °C; the relative humidity is 85%±2%; the ultraviolet spectral distribution is 280 nm~400 nm [middle-wave ultraviolet (UVB) wavelength is 280 nm~320 nm, and long-wave ultraviolet (UVA) wavelength is 320 nm~400 nm]; the irradiation intensity is 150 W/m²~200 W/m², and UVB accounts for 3%~10% of UV(A+B) energy. The cumulative irradiation amount of the glass used for photovoltaic modules should be 30 kW·h/m², 45 kW·h/m², 60 kW·h/m²; the cumulative irradiation amount of the encapsulating adhesive film should be 30 kW·h/m², 45 kW·h/m², 60 kW·h/m²; the cumulative irradiation amount of the photovoltaic backplane should be 45 kW·h/m², 60 kW·h/m², 75 kW·h/m². Close the box door and run the program.
Note: In addition to the recommended cumulative irradiation amount, other irradiation amounts can be agreed upon by the supplier and the buyer.
6.5 Performance test after aging test
After the aging test, take out the sample and test the performance of the sample after aging according to the test items in Table 1.
7 Test data processing
7.1 For glass used for photovoltaic modules, test the sunlight effective transmittance (380 nm~1100 nm) before and after the aging test according to the stipulations in Table 1, and calculate the difference according to the provisions in JC/T 2170.
7.2 For the encapsulating adhesive film, test the yellowness index YI and peeling strength of the glass surface of the sample before and after the aging test according to the stipulations in Table 1, and calculate the yellowing index deltaYI.
7.3 For the photovoltaic backplane, test the yellowness index YI, elongation at break, and peeling strength of the samples before and after the aging test respectively according to the stipulations in Table 1, and calculate the yellowing index deltaYI and the retention rate of elongation at break.
8 Test report
Unless otherwise specified, the report shall include the following. […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 1040.3Plastics—Determination of tensile properties—Part 3:Test conditions for films and sheets
- GB/T 2790Adhesives, 180-degree peel strength test method for a flexible-bonded-to-rigid test specimen assembly
- GB/T 31034Insulating back sheet for crystalline silicon photovoltaic (PV) modules
- JC/T 2170Anti-reflective coated glass for photovoltaic modules
ASTM E 313
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Related Standards
GB/T 1040.3-2006 — Plastics -- Determination of tensile properties -- Part 3: Test conditions for films and sheets
GB/T 1040.3-2026 — Plastics—Determination of tensile properties—Part 3:Test conditions for films and sheets
GB/T 2790-1995 — Adhesives, 180-degree peel strength test method for a flexible-bonded-to-rigid test specimen assembly
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