GB/Z 46984.2-2026Photovoltaic cells - Part 2: Electroluminescence imageing of crystalline silicon solar cells (English PDF)

Foreword

This document is a standard or guiding technical document.

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document is Part 2 of GB/T (Z)46984 "Photovoltaic Cells". GB/T (Z)46984 has already published the following parts.

---Part 1: Test Methods for Light-Induced Degradation of Crystalline Silicon Photovoltaic Cells;

---Part 2: Electroluminescence images of crystalline silicon photovoltaic cells;

---Part 3: Measurement of Current-Voltage Characteristics of Bifacial Photovoltaic Cells;

---Part 4: Test methods for photothermal induced degradation of crystalline silicon photovoltaic cells.

This document is equivalent to IEC TS63202-2:2021 "Photovoltaic cells - Part 2: Luminescent images of crystalline silicon photovoltaic cells".

The type has been changed from IEC technical specifications to my country's national standardization guidance technical documents.

Introduction

GB/T (Z)46984 "Photovoltaic Cells" proposes test methods for photovoltaic cells, providing positive guidance for their testing.

The definition, GB/T (Z)46984, is proposed to consist of the following parts.

---Part 1: Test Methods for Light-Induced Degradation of Crystalline Silicon Photovoltaic Cells. The purpose is to specify test methods for light-induced degradation of photovoltaic cells.

---Part 2: Electroluminescence Images of Crystalline Silicon Photovoltaic Cells. The purpose is to define the methods for obtaining the EL (electroluminescence) of photovoltaic cells and various optical methods.

Description of defects in EL images of a volt-volt cell.

---Part 3: Measurement of Current-Voltage Characteristics of Bifacial Photovoltaic Cells. The purpose is to specify the measurement of IV of bifacial photovoltaic cells. method.

---Part 4: Test Methods for Photothermal Induced Degradation of Crystalline Silicon Photovoltaic Cells. The purpose is to specify the power output of photovoltaic cells under photothermal induction.

Attenuation test methods;

---Part 6: Water Bath Testing Method for Crystalline Silicon Photovoltaic Cells. The purpose is to evaluate the performance of crystalline silicon photovoltaic cell pastes under high temperature and high humidity conditions.

Whether the lining has fallen off, and the extent of the falloff;

---Part 7: Test Methods for Bending Strength of Crystalline Silicon Photovoltaic Cells. The purpose is to evaluate the bending strength of crystalline silicon photovoltaic cells and reduce... Risk of cell breakage;

---Part 8: Test Methods for UV-Induced Degradation of Crystalline Silicon Photovoltaic Cells. The purpose is to evaluate the UV resistance of crystalline silicon photovoltaic cells.

Capabilities that reduce encapsulation losses at the component level.

This document aims to provide guidance for acquiring electroluminescence (EL) images of unencapsulated crystalline silicon (c-Si) photovoltaic cells and to clarify the EL imaging process.

Various detectable defects, and different methods for detecting and differentiating these defects. When a single EL image cannot detect a particular type of defect... When providing conclusive information, it is recommended to use other methods in combination.

Some batteries possess unique EL characteristics, and using these batteries to manufacture components may introduce certain potential risks. This document addresses these risks.

This provides relevant information.

1 Scope

This document specifies a method for detecting cell defects using electroluminescence (EL) images of crystalline silicon (c-Si) photovoltaic cells under forward bias.

This document provides guidelines for acquiring electroluminescence images of unencapsulated c-Si photovoltaic cells and clarifies the various defects that can be detected by EL images.

This involves identifying and differentiating these defects using various methods. When a single EL image cannot provide conclusive information about a particular type of defect... In such cases, it is recommended to use other methods in combination. Some batteries have unique EL characteristics, which may introduce when these batteries are used to make components.

This document provides information on some potential risks.

This document applies to the field of crystalline silicon photovoltaic cells, and also to photovoltaic cells of other wafer types.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document.

Note: GB/T 2297-2025 Terminology for Solar Photovoltaic Energy Systems (IEC TS61836:2025, NEQ)

IEC TS62446-3 Photovoltaic System Testing, Documentation and Maintenance Requirements Part 3: Outdoor Infrared Thermography of Photovoltaic Modules and Equipment

3 Terms and Definitions

The terms and definitions defined in IEC TS61836:2025 and the following terms and definitions apply to this document.