T/SZBIA 0004-2025 Technical Specifications for the Use of Resin Materials in the Structural Components of Lithium-ion Battery Covers

Scope

Main technical content: The standard defines the terminology and definitions of materials used in the structural components of lithium-ion battery covers, clarifies the requirements for structural components applicable to lithium-ion battery covers, test methods, inspection rules, and marking, packaging, transportation, and storage. The main content of this standard includes: 1. Scope: Defines the types of resin materials covered by the standard and their performance when used to manufacture battery structural components. 2. Normative reference documents. 3. Terminology and definitions. 4. Requirements: Proposes key performance indicators that structural components should meet, including appearance and dimensions, processability (welding marks, delamination), chemical stability (resistance to electrolyte), air tightness when used in covers, and performance in batteries (insulation resistance, temperature cycling, extrusion, vibration, etc.). 5. Test methods: Specifies testing standards and methods for various performance indicators, providing a scientific basis for product quality control. The test method in section 5.4 of this standard adopts patented technology (patent numbers: CN112384782A, CN112384782B, and Patent No. 6687064), developed by Daikin Industries Ltd. of Japan, which is used to accurately test the processing performance of resins into structural components. The core of this method lies in accurately detecting the molding quality and processing stability of materials through the tensile strain curve of structural components. This method has been proven to be an important tool for evaluating processability and provides a reliable guarantee for the application of resin materials in battery structural components. 6. Inspection rules: Specifies unified inspection rules and judgment criteria, enabling timely detection and elimination of materials that do not meet requirements, enhancing product consistency and reliability, and ensuring the sa

Development Information

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