H55 Completes First Propulsion Battery Module Certification Tests with EASA for Electric Aviation
H55 has successfully completed its first certification tests for aviation propulsion battery modules, overseen by EASA, marking a significant step toward the commercialization of electric aircraft. The tests confirmed the safe integration of commercial lithium battery cells into aviation systems, addressing critical safety concerns. This achievement paves the way for scalable certification across various aircraft platforms and supports ongoing electric aviation initiatives.
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H55 has successfully completed the first regulator-required certification test sequence for aviation propulsion battery modules, supervised by EASA, on December 19, 2025. This achievement addresses a significant barrier to the commercialization of electric aircraft programs.
The tests confirmed that commercial lithium battery cells can be safely integrated into aviation propulsion systems, capable of handling worst-case failure scenarios, including fire propagation. H55's certified production facility utilized serial-conforming hardware, establishing a pathway for scalable certification across multiple aircraft platforms.
This milestone supports ongoing customer programs, such as the BRM B23 Energic and hybrid-electric initiatives with Pratt & Whitney Canada. H55's Energy Storage System design incorporates monitoring and redundancy at the cell level, ensuring compliance with aviation safety standards and facilitating the transition from validation to scalable commercial deployment in the electric aviation sector.
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