Crashworthy Battery Integration For A Medium-Lift Hybrid-Electric Helicopter

Abstract

This paper presents current research on the development of crashworthy battery integration in medium-lift helicopter airframes. First, an overview of regulatory requirements is presented, followed by an examination of battery installation areas, integration categories, and safety concepts such as Safety Cell and Mechanical Overload. Guidelines for Crash-Resistant Battery Systems (CRBS) are formulated based on existing Crash-Resistant Fuel Systems (CRFS) standards. The study then focuses on crucial technology bricks required for implementing crashworthy battery integration within the framework for the Mechanical Overload concept. A sample suggestion for crashworthy battery pod design using these technology bricks is included. The paper concludes by introducing methodologies for evaluating crashworthiness designs. This includes the use of battery surrogate models, methodologies to investigate the integration concept on the airframe and an overview of relevant load cases to consider.