This document discuss the prospects on the measurement of the differential cross section as a function of the polar angle of the $e^{-}e^{+}\rightarrow b\overline{b}$ process at 250 GeV centre of mass energy with the International Linear Collider. We show the results for an analysis assuming the integrated luminosity of 2000 $fb^{-1}$ foreseen in the baseline project. The measurement requires determining the charge of both jets identified as originated by a b-quark. The charge measurement is optimally performed using the precise micro-vertex detector of the detector ILD and the charged kaon identification provided by the $\frac{dE}{dx}$ information of its TPC. Thanks to the beam polarisation, we can separate the four independent chirality combinations of the electroweak coupling, enhancing in this way the sensitivity to new physics effects. The prospects on the precision on the electroweak couplings determination are presented and compared with the results from past experiments as LEP or SLC.