For the current measurement of rectangular conductor in narrow space,a current measurement device based on elliptic array of Hall elements is proposed,and the relatively optimal array distribution is determined through theoretical calculation and finite element simulation analysis,and the feasibility of the method is verified by constructing an experimental platform and experimentally verifying the validity of the current measurement in the state of conductor eccentricity,and at the same time analyzing the eccentricity error of the current measurement in the state of conductor eccentricity is analyzed.Simulation and experimental results show that the elliptical array current measurement device designed in this paper is within the industrys allowable±1%error limit,allowing wire X-axis eccentricity of -4.1 to 4.1 mm,Y-axis is unlimited;and compared with the traditional current measurement device,the weight is reduced by 82.9%,and the installation occupancy area is reduced by 72.4%,and the applicability to the narrow space is much stronger,which provides technical support for new energy product lightweight,miniaturization,and continuous cost reduction.