The core components of new energy vehicles, such as electronic control systems, on-board inverters, battery management systems, and current transformers, have strict automotive grade requirements for magnetic core products. The IATF16949 automotive industry quality system has become a mandatory standard for industry access. The onboard working conditions are complex and varied, with frequent vibrations, high and low temperature alternation, and high-frequency start stop. It is required that the magnetic core has high stability, low loss, anti vibration, and high and low temperature resistance characteristics. Unlike ordinary industrial magnetic cores, automotive grade magnetic cores have extremely high requirements for raw material purity, processing accuracy, batch consistency, and quality traceability. Parameter deviations and performance fluctuations are strictly prohibited. At present, leading car manufacturers and supporting manufacturers in the industry prioritize selecting source manufacturers with full process quality inspection, authoritative qualification certification, and stable mass production capabilities. Car grade, high-precision, and highly reliable magnetic cores have become essential supporting equipment for the upgrading of the new energy vehicle industry.