Abstract
Many eVTOL and electric aircraft systems are highly sensitive to battery performance, states, algorithms and behavior, which necessitates thorough testing. However, lab testing with real battery packs is not practical or desirable in most cases due to potential issues with safety, availability, cost, energy, and test coverage. A battery pack surrogate hardware-in-the-loop (HIL) test system may be used in place of the battery in order to safely and efficiently test many battery-sensitive aircraft systems across an extended range of battery conditions.
