Energy efficiency calculation method and device for sheet metal resistance heating process and medium

The invention relates to an energy efficiency calculation method and equipment for a metal sheet resistance heating process and a medium. The method comprises the following steps: S1, acquiring voltage, current and temperature data in the metal sheet resistance heating process by utilizing an acquisition device; s2, calculating input electric energy based on voltage and current data in the resistance heating process; s3, virtual grid division is conducted on the metal plate, the heat energy change of each grid is calculated through numerical integration according to the temperature data, the heat energy change of the whole plate is obtained by integrating the heat energy change of each grid, and the heat energy stored by the plate is determined; and S4, calculating the resistance heating energy efficiency according to the input electric energy and the heat energy stored by the plate. Compared with the prior art, the method has the advantages that the characteristics of plate temperature distribution and plate