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GB/T 45330-2025Cathode materials for lithium ion batteries - Determination of water content - Karl Fischer coulometric method (English PDF)

锂离子电池正极材料水分含量的测定卡尔费休库伦法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

February 28, 2025

Implementation date

September 1, 2025

Scope

GB/T 45330-2025 is the English-translated version of 锂离子电池正极材料水分含量的测定卡尔费休库伦法.

GB/T 45330-2025 is the Chinese standard "Cathode materials for lithium ion batteries - Determination of water content - Karl Fischer coulometric method". Its scope clause reads: This document describes the Karl Fischer Coulometry method for the determination of water content in cathode materials for lithium-ion batteries.

This document is applicable to the determination of water content in positive electrode materials such as lithium cobalt oxide (LCO), lithium nickel cobalt manganese oxide (NCM), lithium nickel cobalt aluminum oxide (NCA), lithium manganese oxide (LMO), lithium iron phosphate (LFP), and lithium ferromanganese phosphate (LMFP).

The determination range is 0.0005%~0.5000%. Its clauses include terms and definitions; principle.

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Document preview — GB/T 45330-2025

National Standard of the People's Republic of China

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Terms and definitions4
4 Principle4
5 Reagents or materials5
6 Instruments and equipment5
7 Samples5
8 Test conditions6
9 Test steps6
10 Experimental data processing7
11 Precision7
12 Test report8
Appendix A (Informative) Original data of the precision test9

1 Scope

This document describes the Karl Fischer Coulometry method for the determination of water content in cathode materials for lithium-ion batteries.

2 Normative references

The provisions of the following documents constitute the essential clauses of this document through normative references in this text. Among them, for referenced documents with dates, only the versions corresponding to the dates are applicable to this document; for referenced documents without dates, the latest versions (including all amendments) are applicable to this document.

GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 dew point temperature

The temperature at which the vapor pressure of water in a gas is equal to the saturated vapor pressure of water at a certain temperature.

4 Principle

The sample is heated in a heating furnace, and the water in the sample evaporates into water vapor, which is carried into the titration cup of the Karl Fischer moisture titrator by dry carrier gas for measurement. The water in the sample reacts chemically with the […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 8170Rules of rounding off for numerical values & expression and judgement of limiting values

Cited by

Similar standards

GB 38031-2025|GB/T 1.1-2020|GB/T 8170|GB/T 42511|GB/T 42515|GB/T 41706|GB/T 19396|GB 38031-2020

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