GB/T 36146-2018 in English

1. Background and significance of the standard

GB/T 36146—2018 "Rolled Copper Foil for Lithium-ion Batteries" was formulated in response to the country's demand for the development of the new energy industry, especially in the context of increasing technological progress and quality requirements in the field of lithium-ion batteries. The standard was proposed by the China Nonferrous Metals Industry Association and managed by the National Technical Committee for Standardization of Nonferrous Metals, ensuring its scientificity and authority.

2. Comparison of standard frameworks

3. Technical Requirements Interpretation

3.1 Product Classification and Specifications

The brand and state of copper foil directly affect its application performance. For example, TU1 and TU2 are suitable for general use, while TSn0.12 is suitable for scenes that require higher oxidation resistance due to the addition of tin.

3.2 Chemical composition requirements

Precise control of chemical composition is the basis for ensuring stable performance of copper foil. For example, the tin content of TSn0.12 must be strictly between 0.10% and 0.15% to ensure the material's oxidation resistance and conductivity.

3.3 Dimensions and allowable deviations

The actual thickness of the copper foil is characterized by the mass per unit area, such as the mass per unit area of TU1 at 8μm is 68.0g/m², with an allowable deviation of ±2.0g/m². These data ensure the uniformity and reliability of the product.

3.4 Mechanical properties analysis

Mechanical properties are the guarantee for the long-term use of copper foil in lithium-ion batteries. For example, the tensile strength of TSn0.12 is required to be ≥400MPa, and the elongation after fracture A50mm% ≥1.0%, which is more durable than ordinary copper foil.

4. Implementation recommendations and precautions