RTCA DO-311A, Minimum Operational Performance Standards for Rechargeable Lithium Batteries and Battery Systems, is the primary aviation standard for lithium-ion batteries installed on civil aircraft. It defines performance, safety and environmental test requirements for rechargeable lithium battery systems, with particular emphasis on thermal runaway containment and propagation prevention.
DO-311A was developed jointly with EUROCAE ED-272 and is referenced in FAA Advisory Circulars and EASA certification guidance. It applies to batteries used for emergency power, auxiliary power and propulsion in civil aircraft and is a key document in the certification basis for eVTOL and electric regional aircraft programmes.
References: RTCA DO-311A (official product page)
See also: DO-160, EASA SC E-19, CS-25