With the continuous development of electric energy storage technology, sodium ion battery has gradually become an important technical route in the field of electric energy storage due to its advantages of abundant resources, low cost and environmental friendliness. In order to standardize the application of sodium ion battery in electric energy storage power station and ensure its safety, reliability and performance, the National Standardization Management Agency has issued GB/T ‑2024 "technical specifications for sodium ion batteries of power storage power stations". This standard is centrally managed by the National Technical Committee for Standardization of electric energy storage (TC550). As a National recommended standard, it puts forward system specifications for the design, manufacture, testing and application of sodium ion batteries in electric energy storage systems. This article will focus on the main content of the standard and its technical requirements for detailed analysis.

I. Overview of standards

GB/T ‑2024 is a national recommended standard for sodium ion battery technology in electric energy storage power stations, which is under centralized management by the National Technical Committee for Standardization of electric energy storage (TC550). This standard aims to unify the technical specifications of sodium ion batteries in power energy storage systems, and ensure that the safety, stability and performance indicators of sodium ion batteries meet the practical application requirements, promote the standardized application of sodium ion battery technology in the field of electric energy storage.

The standard covers the basic terms and definitions, technical requirements, test methods, acceptance rules, safety protection measures and other aspects of sodium ion batteries, and has strong pertinence and practicability, it is an important technical basis for the design, manufacture and application of sodium ion batteries.

II. Main contents of the standard

firstly, the standard defines the basic terms of sodium ion batteries and related power energy storage systems, unifies the technical language, and facilitates communication and understanding inside and outside the industry. For example, basic concepts such as the composition structure, Performance Index and use environment of sodium ion battery are defined in detail to ensure the consistency of relevant technical documents and practical operations.

2. Technical requirements

GB/T 44265-2024 puts forward specific requirements for the technical performance of sodium ion batteries, covering electrochemical performance, safety performance, environmental adaptability and Life Index.

• Electrochemical Performance: including the rated capacity, rated voltage, energy density, charge and discharge efficiency, internal resistance, cycle life and other key indicators of the battery. The standard requires that sodium ion batteries should have stable charging and discharging characteristics to meet the energy storage and release requirements of power energy storage systems.
• Security Performance: focus on standardizing the safety protection measures such as overcharge, overdischarge, overcurrent, short circuit and abnormal temperature of the battery to ensure the safe operation of the battery under various working conditions. The standard requires that the battery design must have multiple safety protection mechanisms to prevent fire, explosion and other accidents.
• Environmental adaptability: it is stipulated that the battery must adapt to the operating environment of the power storage power station, such as temperature range, humidity, vibration and impact, to ensure that the battery still maintains good performance in complex environment.
• Life Index: put forward clear requirements for the cycle life and calendar life of the battery to ensure the battery in the power energy storage systemLong-term reliable operation in.

3. Test method

the standard lists the test methods of sodium ion battery performance and safety in detail to ensure the scientificity and repeatability of the test results. Including capacity test, charge and discharge efficiency test, cycle life test, safety performance test (such as overcharge and short circuit test) and environmental adaptability test.

The test method is formulated according to the international standard and the actual needs of the industry, which not only ensures the advanced technology, but also takes into account the feasibility of practical operation, and provides a unified standard procedure for testing the technical indexes of sodium ion batteries.

4. Acceptance rules

GB/T 44265-2024 sodium ion battery products acceptance process and judgment criteria. The acceptance includes visual inspection, dimensional measurement, electrical performance test, safety performance test and environmental adaptability assessment. Through strict acceptance rules, ensure that the sodium ion battery delivered to use meets the technical specifications and quality requirements.

The acceptance rules clearly define the criteria for judging qualified and unqualified products, and put forward the treatment methods for unqualified products, providing strong technical support for the procurement and use process.

the standard particularly emphasizes the safety protection design of sodium ion batteries, requiring the battery system to be equipped with perfect monitoring and protection equipment to monitor the battery status in real time and respond to abnormal conditions in a timely manner. Including the design requirements of battery management system (BMS) to prevent battery overcharge, overdischarge, abnormal temperature, etc.

In addition, the standard also regulates the safety measures of battery installation, transportation and maintenance to ensure the safety management throughout the life cycle.

III. Importance of standards

as a national recommended standard, GB/T ‑2024 has the following important significance:

• standardize industry technical standards: unify the technical indicators and testing methods of sodium ion batteries to promote the improvement and standardized development of the industry's technical level.
• Ensure the safety and reliability of energy storage system: improve the safety and stability of sodium ion battery in power energy storage system through perfect safety requirements and protective measures.
• Promote product quality improvement: clarify acceptance rules and quality control standards, and help sodium ion battery manufacturing enterprises to improve product quality and enhance market competitiveness.
• Promote the application of electric energy storage: sodium ion battery in power energy storage power stationIt provides technical support for the efficient and green operation of the power system.

As a national recommended standard, GB/T ‑2024 technical specification for sodium ion batteries of electric energy storage power station systematically regulates the technical requirements and application specifications of sodium ion batteries in the field of electric energy storage, it provides scientific basis for the safe and efficient application of sodium ion battery. The release and implementation of the standards will help promote the standardized and standardized development of sodium ion battery technology, ensure the safe and stable operation of power storage power stations, and contribute to the optimization of China's energy structure and the green and low-carbon transformation.