Comprehensive Testing Methods for HJT Battery Module
Comprehensive Testing Methods for HJT Battery Module
HJT Battery Module Testing Methods Comparison
Category | Methods & Key Points | Standards/Equipment |
Electrical Performance of HJT battery module | - I-V curve test (Isc, Voc, Pm, FF)- Hysteresis mitigation (Dynamic I-V method)- Bifacial characterization (Equivalent irradiance method) | IEC 60904-1:2023Halm Dynamic Tester |
Optical Performance | - Spectral response (300-1200nm range)- Low-light performance (<200W/m² irradiance) | ISO 9060:2022 Spectrometer |
Reliability Testing | - LID test (1sun light 48h)- PID test (-1000V/85℃, 96h)- UV resistance (UV-A/B accelerated aging) | IEC 61215-2:2023QUV Accelerated Weathering Tester |
Material & Process | - Silver paste resistivity (Four-point probe, <5μΩ·cm)- Encapsulant WVTR (<0.1g/m²/day) | ASTM D3906-2024MOCON WVTR Analyzer |
Field Validation | - Bifacial gain test (Bifaciality≥90%)- Energy yield simulation (PVsyst 7.4+) | IEC 61853-3:2024 |
1. Electrical Performance Testing
· I-V Curve Analysis
o Measures: Short-circuit current (Isc), open-circuit voltage (Voc), maximum power (Pm), fill factor (FF).
o Hysteresis Mitigation: Dynamic I-V method (validated in Joule 2023) reduces capacitance-induced errors.
· Bifacial Characterization
o Equivalent irradiance method (per IEC 60904-1-2:2024) for bifaciality >85%.
2. Optical Performance Testing
· Spectral Response
o Wavelength range: 300–1200nm (ISO 9060:2022 Class A spectrometer).
· Low-Light Performance
o Efficiency drop <5% at 200W/m² (Solar Energy 2024 findings).
3. Reliability Testing
· LID/PID Resistance
o LID: <1% degradation after 48h @1sun (IEC 61215-2:2023).
o PID: -1000V/85℃, 96h test (pass criteria: ΔPmax≤5%).
· UV Stability
o 15kWh/m² UV-A/B exposure (QUV tester, ASTM G154-2023).
4. Material & Process Inspection
· Electrode Conductivity
o Silver paste resistivity: <5μΩ·cm (four-point probe, ASTM D3906-2024).
· Encapsulation
o Water vapor transmission rate (WVTR): <0.1g/m²/day (MOCON testing).
5. Field Validation
· Bifacial Gain
o ≥90% bifaciality in real-world conditions (IEC 61853-3:2024).
· Energy Yield Simulation
o PVsyst 7.4 with HJT-specific models (±3% accuracy, Progress in PV 2023).
