New energy vehicles are designed to operate reliably at precise voltage levels,and the DC/DC converters play a pivotal role in this operation.However,the existing control methods for these converters are predominantly linear and struggle to adapt to varying load and input voltage conditions.To address this,we propose the "PI Impedance Compensation Passive Control Strategy,"which incorporates a PI impedance feedback compensation loop based on non- linear control principles.To establish its superiority,a comparative analysis was conducted against existing methods. Simulations focused on assessing the strategy's performance under varying load and input voltage conditions.Results showed a mere 2 V fluctuation after an 8 V drop in input voltage.In the scenario of a sudden load transition to half of its initial value,the strategy swiftly readjusted to the designated voltage in under 0.01 seconds. These simulations confirmed the strategy's rapid response without overshooting.Even in instances of significant load and input voltage variations,the strategy effectively mitigated external disturbances,maintaining output voltage stability and achieving outstanding voltage ripple suppression,highlighting its robustness.