Electric heating apparatus for deicing, method for manufacturing the same, blade and wind turbine including the same

A method for manufacturing an electric heating apparatus for deicing, comprising:

• laying a first substrate;
• laying, on the first substrate, a first thermally conductive encapsulating material, a heat generating module, a second thermally conductive encapsulating material, and a second substrate in the sequence listed;
• and
• heating and pressing said multi-layer structure to form a laminate, so that the first thermally conductive encapsulating material and the second thermally conductive encapsulating material cover a remaining portion of the heat generating module except a lead-out portion for connecting an external power supply;
• wherein the heat generating module comprises a heat generating element and a bus bar for conducting electricity to the heat generating element, the bus bar comprises the lead-out portion, and the heat generating module except the lead-out portion is insulated from the first thermally conductive encapsulating material and the second thermally conductive encapsulating material;
• wherein the first substrate is closer to a surface than the second substrate, and the surface is a target of the deicing;
• and
• wherein an electrical conductivity of the first substrate is smaller than an electrical conductivity of the second substrate, and a thermal conductivity of the first substrate is greater than a thermal conductivity of the second substrate.