Ultrafine conductors, through meticulous material design at the microscale, offer a novel technological approach to addressing the critical needs of new energy vehicles in terms of endurance, charging, batteries, and power density. Ultrafine conductor technology is comprehensively driving the advancement of new energy vehicle technology, encompassing the three core systems of batteries, electric drives, and electronic controls, as well as the potential field of electromagnetic compatibility. These microscale materials collectively contribute to solving the core issues that users care most about, such as endurance, charging, and safety, by enhancing efficiency, reducing weight, improving heat dissipation, and ensuring stability.