Introduction

2026 marks a historic turning point for the power battery industry, widely recognized as the first year of mass production for semi-solid-state batteries. Leading manufacturers including CATL, BYD, Ganfeng Lithium Battery, and WeLion New Energy have successively announced mass-production and vehicle-installation plans, with the sulfide-based all-solid-state battery technology route becoming increasingly clear.

In early April 2026, the CLNB 2026 Solid-State Battery Conference held in Suzhou reached a professional consensus:2026–2030 will be the critical window for the industrialization of solid-state batteries.

However, accelerated industrialization also means an upgraded demand for testing and certification.Solid-state batteries fundamentally differ from traditional liquid lithium-ion batteries in material systems, interface characteristics, and failure modes. Whether the existing testing standard system can sufficiently cover their safety assessment has become a core question urgently requiring industry-wide answers.

I. Industrialization of Solid-State Batteries: From Proof of Concept to Mass Production

1.1 Semi-Solid-State Takes the Lead; All-Solid-State Is Ready to Launch

In 2026, the industrialization of solid-state batteries follows a clear two-step strategy:

Semi-Solid-State Batteries have achieved economically viable mass production and vehicle integration.Represented by WeLion New Energy and Ganfeng Lithium Battery, semi-solid-state batteries are now officially used in mass-produced models.CATL’s condensed battery system has also achieved breakthroughs in aviation applications.

All-solid-state batteries remain in the critical pilot stage.In February 2026, BYD’s sulfide-based all-solid-state battery passed full automotive-grade reliability certification by CATARC (China Automotive Technology and Research Center), marking a landmark industry event.The sulfide route has become the mainstream technical path due to its high ionic conductivity, with supporting industrial chains rapidly improving.

1.2 Dual Drivers: Policy and Capital

National and local governments continue to strengthen support for solid-state batteries, with targeted subsidies and industrial funds widely implemented.The Judging Method for All-Solid-State Batteries (T/CSAE 434-2025), released in 2025, clarified technical definitions and laid a classification foundation for industrialization.

In early 2026, many regions included solid-state battery industrial bases in key projects of the 15th Five-Year Plan, forming a triangular driving structure:policy guidance + enterprise mass production + capital investment.

II. Technical Challenges in Solid-State Battery Testing

2.1 Incompatibility with Current Standard Systems

As of April 2026, no dedicated mandatory national standard for solid-state batteries has been officially issued.Testing currently mainly references existing power battery standards, including:

• GB 38031-2020 Safety Requirements for Traction Batteries for Electric Vehicles(for on-board battery pack safety testing)
• IEC 62619:2022 Safety requirements for secondary lithium-ion cells and batteries for industrial applications(for energy storage scenarios)
• GB/T 36276-2023 Lithium-ion Batteries for Power Energy Storage(for performance and safety testing of energy storage systems)

However, all these standards were designed for liquid electrolyte batteries and face major compatibility challenges:

表格

2.2 Special Importance of Lithium Plating Detection

Lithium plating is especially critical in solid-state batteries.The interface stability between solid electrolytes and lithium metal anodes directly affects battery safety and cycle life.

Drawing on the newly added cycle aging lithium plating detection requirement in GB 47372-2026, lithium plating assessment for solid-state batteries will become one of the key focuses in future dedicated standard development.

2.3 Reference Framework of International Standards

The IEC Technical Committee (TC21/SC21A) has initiated pre-research on dedicated solid-state battery standards.The IEC 63203 series is refining test methods for solid-state batteries in wearable and portable devices, providing a reference framework for domestic standard formulation.

III. Export Tax Rebate Adjustment Increases Compliance Testing Pressure

Starting April 1, 2026, China’s tax policy was adjusted:the export tax rebate rate for energy storage and power battery products was reduced from 9% to 6%,and will be completely abolished on January 1, 2027.

This policy forces battery exporters to accelerate international certification planning.Demand has surged significantly for:

• UN 38.3 transportation safety testing
• IEC 62619 industrial safety certification
• UL 1973 North American energy storage certification

Under cost pressure, enterprises rely more on high-quality testing reports to prove compliance, maintain international competitiveness, and avoid order losses due to missing certifications.

FAQ

Q1: Are there dedicated national testing standards for solid-state batteries?

As of April 2026, no dedicated mandatory national standard has been officially released and remains under development.Current testing for solid‑state and semi‑solid‑state batteries mainly references existing standards such as GB 38031-2020 and IEC 62619:2022.Dedicated standards are expected to be gradually issued between 2026 and 2027.

Q2: What is the testing difference between semi-solid and all-solid-state batteries?

Semi-solid-state batteries still contain partial liquid electrolyte, so their testing methods are close to traditional lithium batteries with good compatibility with current standards.All-solid-state batteries use solid electrolytes and differ fundamentally in thermal runaway, lithium plating, and interface degradation, requiring dedicated test methods.At present, testing mainly focuses on performance verification, while safety test methods are still under industry discussion and improvement.

Q3: What certifications are required for exporting solid-state batteries?

Typical certifications include:

• UN 38.3 (mandatory for air and sea transportation)
• IEC 62619 (industrial & energy storage safety)
• Target market certifications: EU CE (IEC 62133), North America UL 1973, etc.

Following the 2026 export tax rebate adjustment, enterprises are advised to plan certification schedules early to ensure full compliance.

Q4: What specific services does Guangdong Energy Storage Testing Technology Co., Ltd. provide?

We issue third-party testing reports for solid‑state and semi‑solid‑state batteries based on current standards including GB 38031-2020, IEC 62619:2022, UN 38.3, etc.Services include:

• Electrical safety testing
• Mechanical safety testing
• Thermal safety testing
• Cycle aging testing
• Lithium plating risk assessment
• Transportation safety testing

Testing cycles vary by project; detailed inquiries are welcome.

Q5: What is the latest progress in national solid-state battery standards in 2026?

MIIT and the Standardization Administration have included solid-state battery standards in priority development plans.The China Society of Automotive Engineers released T/CSAE 434-2025 in 2025 to define technical criteria.The IEC has also started pre-research.Formal mandatory national standards are expected to be implemented around 2027.

Conclusion

2026, the first year of solid-state battery mass production, is not only a technological milestone but also a major challenge and opportunity for the testing and certification system.Guangdong Energy Storage Testing Technology Co., Ltd. will continuously track standard updates and provide professional technical support to help China’s solid-state battery industry develop safely, standardizedly, and with high quality.

For more details about solid-state battery testing services, please contact us.