LG Chem has succeeded in flying at excessive altitude with a lithium-sulfur battery for the primary time in Korea – Drones Information
■ Charging a lithium-sulfur battery in a solar-powered unmanned aerial vehicle (EAV-3) developed by Korea Aerospace Research Institute
– Conducting a first flight test with a lithium-sulfur battery in Korea
■ Confirmation of a stable charge / discharge function of a lithium-sulfur battery in the extreme environment of the stratosphere
– Flying with a stable performance even at 70 degrees below zero and an atmospheric pressure of 1/25 of one near the ground
■ CTO / President Kisu Ro,
“LG Chem will cement its position as a leader in the global battery market by focusing on research and development in the next generation battery sector.”
In Korea, LG Chem has succeeded for the first time in testing an unmanned vehicle at the highest altitude with the next-generation battery.
In this regard, LG Chem announced that a high-altitude solar-powered unmanned vehicle (EAV-3) developed by the Korea Aerospace Research Institute has successfully completed flight tests in the stratosphere with its lithium-sulfur battery 10.
* Stratosphere: it is an atmospheric layer between 12 and 50 km in height between the troposphere (ground – 12 km) and the mesosphere (50 to 80 km).
EAV-3 is a small aircraft that can fly on solar energy and batteries for long periods at stratospheric altitude of 12 km or more. It charges energy using a solar cell located on top of the wing. During the day it flies with a solar cell and battery power as an energy source and at night with battery power that is charged during the day. It has wings 20 m long and a body 9 m long.
On August 30, LG Chem charged a lithium-sulfur battery on EAV-3 at the Korean Aerospace Research Institute’s Aviation Center in Goheung and conducted flight tests for approximately 13 hours from 8:36 a.m. to 9:47 p.m. LG Chem is the first company in Korea to do flight tests on a lithium-sulfur battery.
In particular, EAV-3 flew at an altitude of 22 km, which is unprecedented for an unmanned domestic aircraft, and set a new flight record at the highest attitude in the stratosphere in Korea. Also, it flew 7 hours out of a total of 13 hours of flight with a stable performance at the stratospheric altitude of 12 to 22 km where a general plane cannot fly.
These combat tests are of great importance as they confirm a stable charge / discharge function of a lithium-sulfur battery, the next generation battery in the extreme environment of the stratosphere with a low temperature of 70 degrees below zero and an atmospheric pressure of 1 / 25 of one near the ground that is near a vacuum state.
A lithium-sulfur battery is one of the next generation batteries that will replace a lithium-ion battery, and its energy density is 1.5 times higher than that of the existing lithium-ion battery, which is due to its light weight has high energy density by weight materials such as sulfur and carbon compounds for anode materials and lithium metal, etc. for cathode materials. The advantage of the lithium-sulfur battery is that it is lighter and more competitively priced compared to the existing lithium-ion battery because it does not use rare metals.
It is also seen as a key component that would determine the function of future transportation, such as: Electronic cars, as well as long-life drones and private planes, etc., and many countries around the world compete intensely for their development.
The Innovative Battery Project team at the LG Chem Future Technology Research Center has been researching the development of a lithium-sulfur battery at low temperature and atmospheric pressure for a year and six months by creating an extreme environment similar to the stratosphere that was successfully completed This flight test is based on such research.
In the future, LG Chem plans to demonstrate a long-haul flight lasting more than several days by producing additional test products for lithium-sulfur batteries. In addition, the mass production of a lithium-sulfur battery is planned, the energy density of which after 2025 will be more than twice that of the current lithium-ion battery.
Kisu Ro, CTO / President of LG Chem, said, “LG Chem has proven that it has the world’s best technology in next-generation, high-energy density battery technology from these flight tests.” And “It will cement its position as that leading company in the global battery market focused on research and development of the next generation battery sector. “