Amprius batteries power first stratospheric flight for BAE Systems drone

Amprius Technologies announced that its high-density silicon anode batteries played a significant role in powering BAE Systems first successful stratospheric flight trial. PHASA-35, the High-Altitude Pseudo Satellite (HAPS) Uncrewed Aerial System (UAS) designed by BAE Systems’ subsidiary Prismatic Ltd., is planned to operate above the weather and conventional air traffic.

During a recent test-flight, the PHASA-35 crossed an altitude of more than 66,000 feet, reaching the stratosphere, before landing successfully. The trial, completed last month in New Mexico, allowed engineers to assess the experimental solar-electric drone within the edges of the planet’s atmosphere.

PHASA-35’s first stratospheric showcases BAE Systems’ commitment to technological innovation and market expansion. As a High-Altitude Long Endurance (HALE) vehicle, the PHASA-35 (standing for Persistent High Altitude Solar Aircraft) is powered by the sun during the day and by batteries overnight. The long-life battery and highly efficient solar technology allow the aircraft to potentially maintain flight for up to a year, operating in the upper regions of Earth’s atmosphere. The novel aero structure design and advanced solar technology make PHASA-35 a game changer in the air and space market.

Amprius announced in October of 2022 that it had entered into a three-year cooperation agreement with BAE Systems. Both parties agreed to investigate business opportunities enabled by the use and supply of Amprius’ silicon anode batteries for electric products being developed by BAE Systems in the UK.

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