Engineered fluids partners with Dovetail Electric Aviation todevelop immersion-cooled battery for electric aircraft

The immersion-cooled battery will become an integral part of Dovetail’s electric propulsion systems, designed to convert conventional regional aircraft into zero-emission platforms, but DovePack will also become an energy solution for other electric aviation companies, whether eVTOL or eCTOL, to which Dovetail is offering its proprietary technology. The collaboration aims to validate immersion cooling technology as a breakthrough thermal management solution in electric aircraft. In aviation—where safety, thermal stability, and performance are mission critical—immersion cooling provides a breakthrough approach to energy storage management.

“Electric aviation cannot scale without better thermal management at the battery level,” said Lars Heeg, EMEA Director at Engineered Fluids. “By fully immersing battery cells in AmpCool, we can deliver dramatically better heat dissipation, prevent thermal runaway propagation, and extend battery performance in the most demanding environment imaginable flight.”

Unlike traditional air- or cold plate-cooled systems, AmpCool™ offers direct-contact cooling by surrounding each battery cell with a non-conductive, non-flammable, and chemically stable fluid. This provides 1,000x better thermal conductivity than air and serves as a built-in fire suppressant by isolating and containing failed cells without pressure relief systems or external cooling.

Additionally, immersion cooling enables simpler thermal management architectures, eliminating heavy and complex heat sinks, fans, pumps, and tubing—resulting in a lighter overall battery system. For aircraft, where weight is directly tied to range and efficiency, this reduction is a critical enabler for longer, cleaner flights.

Dovetail is currently testing this architecture in both Spain and Australia with very positive results, conducting a series of stringent tests. The tests form part of the integration roadmap for DovePack, which is designed to power certifiable retrofit aircraft under Dovetail’s zero-emissions electric propulsion architecture. These tests have successfully demonstrated AmpCool’s and DovePack’s ability to prevent propagation of thermal events and maintain thermal stability under stress conditions.

“Integrating immersion cooling with AmpCool into our DovePack system (Dovetail Electric Avaition’s proprietary battery technology) allows us to build safer, lighter, and more compact batteries—something essential for zero-emission flight,” said David Doral, CEO of Dovetail Electric Aviation. “Our mission is to make regional air travel fully electric, clean, and quiet—without compromising on safety. This collaboration marks a major step forward in enabling robust battery systems that meet aviation’s toughest demands.”

This collaboration marks a milestone in the future of sustainable aviation. With global attention on reducing carbon emissions in air travel, Engineered Fluids and Dovetail are tackling the key barrier to progress: enabling battery systems that meet the highest thermal and operational standards in flight