CURRENT SENSOR

A current sensor, fora vehicle battery in a vehicle, with an electrical conductor which has a first connection and a second connection for contacting a power circuit of a vehicle. The current sensor includes a first current measurement device and a second current measurement device for measuring the current flowing over the electrical conductor. An evaluation circuit receives measurement values of the first current measurement device and/or the second current measurement device to output a current measurement signal proportional to the current. The first current measurement device utilizes a Hall effect sensor disposed within a constriction with a reduced cross section of the electrical conductor.