China has taken a step toward industrializing solid-state battery technology with the release of its first national standard, published by the National Automotive Standardization Technical Committee on December 30. The new standard aims to establish terminology and classifications for these advanced batteries.
Key Takeaways
- The draft includes a strict classification system based on ion transfer methods and electrolyte type.
- To qualify as solid-state, the weight loss rate must not exceed 0.5% under specific testing conditions.
- A more stringent verification criterion than previous industry guidelines is introduced to ensure quality control.
The new standard defines three types of batteries based on ion transfer methods: liquid electrolyte, hybrid solid-liquid, and pure solid-state. This classification system aims to clarify the technology’s progression from lab research to commercial applications.
Under this draft, genuine solid-state batteries must meet a stringent weight loss rate requirement of 0.5% under vacuum drying conditions. This is stricter than the previously proposed threshold of 1%, indicating China’s commitment to high standards for these emerging technologies.
The document also includes classifications by electrolyte type (sulfide, oxide, polymer, halide, or composite) and conducting ion type (lithium-ion, sodium-ion). These details will be crucial as the industry moves toward commercialization of solid-state batteries.
Separate technical specifications for solid-state electrolytes are also being drafted alongside this standard. This comprehensive approach signals China’s intent to lead in the development and regulation of next-generation battery technologies.
Frequently Asked Questions
What does ‘solid-state’ mean for batteries?
Solid-state refers to a type of battery that uses solid electrolytes instead of liquid ones. This can improve safety and energy density.
Why is the weight loss rate important?
The weight loss rate helps determine if a battery contains any residual liquid components, which affects its classification as ‘solid-state.’
This standard marks an important milestone in China’s efforts to dominate the global market for electric vehicle technologies. It sets the stage for further regulations on performance and safety.
