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CATL Aviation Battery Passes Thermal Runaway Test

August 23, 2026

2 min read

Key Takeaways

CATL's aviation power battery system passed thermal runaway test.
System uses prismatic cells with 350 Wh/kg energy density.
No thermal propagation occurred in adjacent cells.
Battery system ready for mass production.

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Strategic Implications

This breakthrough may indicate a significant improvement in eVTOL safety, which could accelerate the adoption of electric vertical takeoff and landing aircraft. The successful test suggests that CATL's technology may set a new standard for the industry, potentially influencing the development of future eVTOL power systems.

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What Happened

Breakthrough In Safety Performance For Evtol Power Systems

CATL’s aviation power battery system has successfully passed a verification test for no thermal runaway propagation for adjacent cells, marking a new benchmark in safety performance. The system, designed for passenger eVTOLs, uses prismatic cells with an energy density of 350 Wh/kg. The test was witnessed by representatives from the Civil Aviation Administration of China, laying the foundation for eVTOLs to meet civil aviation safety standards. The battery system is now ready for mass production and will be first used on AutoFlight’s passenger eVTOLs, as reported by Markets Insider.

Source | Originally Published: August 23, 2026

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