Current detection device with stepped copper bar

A current detection device with a stepped copper bar comprising a stepped copper bar, a current shunting copper bar, a magnetic induction module, and a circuit board, wherein the magnetic induction module is secured on the circuit board;

• the stepped copper bar and the current shunting copper bar are connected in series and parallel to form a to-be-measured current input module, the magnetic induction module and the circuit board form a signal output module, and the to-be-measured current input module is electrically isolated from the signal output module;
• the side of the stepped copper bar facing the magnetic induction module is stepped, and the stepped copper bar comprises at least a first step and a second step;
• the magnetic induction module at least includes a first magnetic sensing unit and a second magnetic sensing unit, the first magnetic sensing unit and the second magnetic sensing unit are located on the same horizontal plane, the horizontal plane is parallel to the plane where the circuit board is located, and in a direction perpendicular to the circuit board, the first magnetic sensing unit is located above the first step, and the second magnetic sensing unit is located above the second step;
• a current to be measured flows through a cross section perpendicular to the stepped copper bar and the current shunting copper bar, and generates a magnetic field at the position of the magnetic induction module;
• the first magnetic sensing unit and the second magnetic sensing unit sense, in a differential manner, the magnetic field generated by the current to be measured flowing through the to-be-measured current input module, and generate a voltage signal, which forms an output signal of the current detection device with a stepped copper bar.