China Defines ‘True Solid-State’: New IEC Standard Sets Sub-0.5% Volatile Mass Loss Threshold for EV Batteries

STARNEWS China

Overview

The International Electrotechnical Commission (IEC) has approved a Chinese-led proposal establishing an international standard for electric vehicle (EV) all-solid-state batteries. This standard rigorously defines ‘true all-solid-state’ by requiring less than 0.5% volatile organic mass loss at 120°C in a vacuum, aiming to differentiate it from semi-solid solutions. Bolstered by government tax exemptions and aggressive investments from major manufacturers like Sunwoda and EVE Energy, China is rapidly advancing its pilot lines, targeting 400 Wh/kg energy density and 0.2 GWh/year production, positioning itself at the forefront of next-generation battery technology.

In Depth

Background

All-solid-state batteries represent a focal point of intense global research and development, lauded for their potential to deliver high energy density, superior safety, and extended lifespan – qualities positioning them as the widely anticipated next-generation power source for EVs. As the world’s largest market for EV adoption and battery production, China is aggressively pursuing leadership, not only in technological innovation but also in the crucial domain of standardization. Establishing international standards is a strategic imperative that streamlines technological diffusion, diminishes trade barriers, and strategically positions national technologies and products within the competitive global marketplace. This IEC approval unequivocally highlights China’s expanding international influence in defining the technological roadmap and market trajectory for all-solid-state batteries.

Key Findings

The International Electrotechnical Commission (IEC) has formally approved a Chinese-led proposal establishing a global standard for all-solid-state batteries in electric vehicles (EVs). This landmark decision is set to profoundly influence the worldwide development and commercialization trajectory of this critical technology. Crucially, the standard introduces a stringent definition for a ‘true all-solid-state battery,’ mandating a mass loss threshold of less than 0.5% due to volatile organic evaporation at 120°C under vacuum conditions, thereby drawing a clear line between fully solid and semi-solid battery chemistries.

Technical Details

Now formally adopted by the IEC, the Chinese-proposed international standard establishes new benchmarks for both the performance evaluation and safety criteria of all-solid-state batteries. The mandate for less than 0.5% volatile organic mass loss under the rigorous conditions of 120°C and vacuum directly addresses the core advantages expected from all-solid-state technology: superior thermal stability and the effective elimination of liquid electrolyte leakage risks. This stringent benchmark serves to distinguish true all-solid-state batteries not only from conventional liquid lithium-ion counterparts but also from certain semi-solid batteries utilizing gel electrolytes. Complementing this standardization effort, the Chinese government has introduced tax exemptions for all-solid-state batteries, valid until December 31, 2028, to foster domestic innovation. Concurrently, major Chinese battery manufacturers, including Sunwoda and EVE Energy, are rapidly advancing their pilot production lines, with ambitious targets of achieving an energy density of 400 Wh/kg and an annual production capacity of 0.2 GWh.

Strategic Significance & Outlook

The Chinese-led international standardization of all-solid-state batteries is set to profoundly reshape the development strategies of battery manufacturers and automakers across the globe. This newly established, rigorous definition will likely accelerate the pursuit of genuinely all-solid-state battery technologies, simultaneously crystallizing the distinction from semi-solid alternatives. Within China, the synergy of government-backed tax incentives and substantial investments from key manufacturers is expected to significantly propel the mass production and performance optimization of these advanced batteries. Through these integrated efforts, China is strategically positioning itself to exert substantial leadership in both technological advancement and standardization within the nascent next-generation battery market, ultimately shaping the long-term future of the global EV industry.

Get our weekly technology intelligence — free

Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.

Subscribe Free — Weekly Tech Intelligence

By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.

• Your email and selected fields are used only to deliver the newsletter.
• We never share your information with third parties.
• You can unsubscribe anytime via the link in each email.

See our Privacy Policy for details.

Agree & Continue ▶

Takes about a minute · Unsubscribe anytime