电动汽车非车载充电机示值误差测得值的不确定度分析

Uncertainty Analysis of Indication Error of Off-board Charger for Electric Vehicles

电动汽车充电桩是用于贸易结算的计量器具,已列入市场监督总局发布的《实施强制管理的计量器具目录》中。目前充电桩正处于高速发展的时期,特别是需求旺盛的非车载充电机,其计量检定工作将逐步开展起来。本文分析了电动汽车非车载充电机示值误差测得值的测量不确定度,其主要来源于四个因素:测得值的重复性,检定装置的误差、数据修约和充电电缆电能损耗。

Charging pile of electric vehicle is a measuring instrument used for trade settlement,which has been included in the"Catalogue of Measuring Instruments for Compulsory Administration"issued by the state administration for market regulation.At present,charging pile is in the period of rapid development,especially for off-board charger with strong demand,the metrological verification work will be carried out gradually and comprehensively.This paper analyzes the measurement uncertainty of indication error of off-board charger for electric vehicles,it mainly comes from three factors:the repeatability of measurement results,the error of verification device,the data rounding and power loss of charging cable.