Recently, Rolls Royce announced that it had completed the flight test of its first electric aircraft. In the published photos, an electric plane with fashionable appearance looks dynamic against the background of the earth. "Innovative spirit" all electric aircraft The electric aircraft, called "innovative spirit", is part of Rolls Royce's "accelerated flight electrification" program. The machine is powered by 6000 battery packs with a power of 400 kW. This battery pack is also the propulsion battery pack with the highest energy density so far. Rolls Royce said that in the flight test, the "innovative spirit" electric aircraft set three world records. Reach the highest speed of 556 km / h within 3 km (exceeding the original record of 212 km / h), reach the speed of 531 km / h within 15 km (exceeding the original record of 292 km / h), and climb to the height of 3 km in 202 seconds (60 seconds faster than the original record). In addition, the maximum speed of the aircraft is 623 km / h, which is considered to be the fastest all electric equipment in the world. The brilliant flight performance of the "innovative spirit" electric aircraft is due to the high energy density battery pack. In the field of all electric equipment, battery energy density is the main factor restricting the development. Therefore, it is difficult for aircraft with high mobility requirements, especially fighter, to realize all electric propulsion. The breakthrough of "innovative spirit" electric aircraft in battery pack technology is expected to promote the development of electrification of military aircraft. Perhaps in the near future, the technology related to the "innovative spirit" electric aircraft will be popularized in the military field. At the same time, with the development of all electric propulsion technology, more high-energy density batteries that meet the needs of combat will be developed, and even replace the fuel power system. (outlook new era)