A groundbreaking technology has been developed in South Korea to prevent temperature rise during high-pressure hydrogen charging, revolutionizing the efficiency and safety of hydrogen refueling systems. Led by Principal Researcher Dae-Hwan Kim at the Korea Institute of Machinery and Materials, the innovative method eliminates the need for pre-cooling by using an incompressible fluid, thus significantly reducing infrastructure costs and shortening refueling times. Through successful demonstration tests, the technology proved that internal temperature rise can be controlled within 5°C during 350 bar hydrogen charging. This advancement not only accelerates the adoption of hydrogen mobility but also strengthens global competitiveness in the hydrogen economy. Traditionally, hydrogen refueling required cooling the hydrogen to -40°C, resulting in longer charging times and higher infrastructure costs. The newly developed method pre-fills the hydrogen tank with an incompressible fluid, such as water, to prevent adiabatic compression and temperature increase during charging. This approach offers faster and more efficient refueling, enhances user convenience, and reduces maintenance costs by preventing thermal degradation of tank components. Principal Researcher Dae-Hwan Kim highlighted the technology's potential application in various sectors beyond vehicles, including large-capacity hydrogen containers for ships, trains, and military vehicles. The research, supported by the Korea Institute of Machinery and Materials, aims to propel the hydrogen economy forward by improving infrastructure efficiency and promoting global market competitiveness. This innovative development marks a significant step towards a sustainable and efficient hydrogen ecosystem.