Challenges and key requirements of batteries for electric vertical takeoff and landing aircraft

Electric vertical takeoff and landing (eVTOL) aircraft have attracted considerable interest as a disruptive technology to transform future transportation systems. Their unique operating profiles and requirements present grand challenges to batteries. This work identifies the primary battery requirements for eVTOL in terms of specific energy and power, fast charging, cycle life, and safety, revealing that eVTOL batteries have more stringent requirements than electric vehicle batteries in all aspects. Notably, we find that fast charging is essential for downsizing aircraft and batteries for low cost while achieving high vehicle utilization rates to maximize revenues. We experimentally demonstrate two energy-dense Li-ion battery designs that can recharge adequate energy for 80 km eVTOL trips in 5-10 min and sustain over 2,000 fast-charge cycles, laying a foundation for eVTOL batteries.

Automated summary

Electric vertical takeoff and landing (eVTOL) aircraft, seen as a disruptive technology for future transportation systems, have high demands for batteries in terms of fast charging, long cycle life, and safety. Research shows that fast charging is crucial for downsizing aircraft and batteries to reduce costs, while maximizing utilization rates for revenue optimization.