Electric current detection device and electric current detection method

An electric current detection device, comprising:

• magnetism detector elements for detecting a strength of a magnetic field generated by an electric current flowing through an electric current path;
• a detection circuit for detecting a magnitude of an electric current flowing through the electric current path based on an output of the magnetism detector elements;
• a circuit board mounting the magnetism detector elements and comprising a plurality of terminals and a multilayer structure comprising a plurality of wiring layers;
• and
• a plurality of wires that are connected to the magnetism detector elements via the plurality of terminals of the circuit board and extend in a direction away from the electric current path,
• wherein each of the magnetism detector elements has a magneto-sensitive axis, and are arranged outside the electric current path such that a direction of each of their respective magneto-sensitive axes lies in a first plane parallel to a current-carrying direction of the electric current path and parallel to an extending direction of the plurality of wires,
• wherein the plurality of wires are arranged in a second plane orthogonal to the first plane, and
• wherein the plurality of wires are arranged on the plurality of wiring layers of the circuit board so as to be spaced from each other in a thickness direction of the circuit board.