The core technical parameters of new energy wiring harnesses directly determine their adaptability, safety, and service life, mainly encompassing six categories: First, voltage level, which is divided into high-voltage wiring harnesses (200V-800V, with mainstream being 400V and 800V) and low-voltage wiring harnesses (12V-48V). High-voltage wiring harnesses need to be compatible with high-voltage equipment such as battery packs and motors, while low-voltage wiring harnesses are used for control signal transmission. Second, rated current, with high-voltage power wiring harnesses having a rated current of 50A-500A, flexibly selected according to equipment power, and low-voltage signal wiring harnesses having a rated current of 0.5A-10A. Third, insulation performance, with high-voltage wiring harnesses having an insulation resistance of ≥100MΩ and a voltage resistance of ≥2 times the rated voltage +1000V to avoid high-voltage leakage. Fourth, temperature resistance, with the operating temperature range covering -40℃ to 150℃, and the internal wiring harness of the battery pack needing to withstand temperatures above 125℃ to cope with battery heating conditions. Fifth, protection level, with outdoor energy storage and charging pile wiring harnesses having a protection level of ≥IP67, and the internal wiring harness of the battery pack having a protection level of ≥IP65 to prevent water and dust intrusion. Sixth, shielding performance, with signal wiring harnesses having a crosstalk suppression better than -45dB@1GHz to avoid electromagnetic interference affecting equipment control accuracy. These parameters need to be precisely matched with the types of new energy equipment (automobiles, energy storage, photovoltaics) and operating conditions to ensure operational safety.