Insulating backsheet for crystalline silicon solar cell modules
1Key Takeaways
The National Standardization Administration of China has released a new standard for Insulating Backsheets Used in Crystalline Silicon Solar Cell Modules, designated as GB/T 31034-2024. This standard is scheduled to be implemented on April 1st, 2025, and aims to provide detailed specifications and quality requirements…
2Expert Interpretation
In-depth analysis of the "National Standard of the People's Republic of China GB/T 31034-2024 Insulating Backsheet for Crystalline Silicon Solar Cell Modules", covering the standard background, technical requirements, performance indicators and implementation recommendations, to help you fully understand industry regulations.
1. Background and significance of standard formulation
As the core component of the photovoltaic industry, the performance and safety of crystalline silicon solar cell modules are directly related to the reliability and life of the entire system. The insulating backplane is an important component to protect the solar cell modules from the external environment, and it undertakes key functions such as insulation, weather resistance, and anti-aging.
2. Comparison of standard technical frameworks
| Serial number | Item | Unit | Requirements | ||
|---|---|---|---|---|---|
| Composite type | Coating type | Co-extrusion type | |||
| 1 | Unit area mass and allowable deviation thermal shrinkage rate | 一 | Nominal value±10% | ≤1.5 ≤1.0 | |
| Tensile strength | MPa | ≥70 | ≥15 | ||
3. Analysis of Standard Technology Evolution
Compared with the 2014 version, the new version of the standard mainly adds technical requirements for co-extruded backsheets and optimizes a number of performance indicators:
- New content:Added classification and performance requirements for co-extruded backsheets.
- Updated content:Adjusted technical parameters such as system maximum voltage and ultraviolet aging radiation dose.
- Deleted content:Cancelled the relevant provisions of wear resistance and electrolytic sensor method in test methods.
4. Implementation Suggestions
To ensure that the insulating backplane meets the requirements of GB/T 31034-2024 standard, the following measures are recommended:
- Supplier selection:Give priority to suppliers with rich industry experience and technical capabilities.
- Quality inspection:Test key indicators such as appearance, thickness, and tensile strength in accordance with standard requirements.
- Environmental adaptability verification:Test salt spray resistance, UV aging resistance and other performance in the actual use environment.
- Long-term monitoring:Establish a long-term tracking mechanism to ensure the stability and reliability of the backplane during use.