Nickel plated heat treated steel sheet for battery case having excellent surface corrosion resistance with conductivity

A method of manufacturing a nickel-plated heat-treated steel sheet, comprising:

• forming a nickel layer by plating Ni on one or more sides of the base steel plate;
• and
• heat treating the base steel plate and the nickel layer to form a Ni—Fe diffusion layer therebetween,
• wherein the nickel-plated heat-treated steel sheet includes a base steel plate, a nickel layer with a thickness of 0.5 to 6 μm, which is formed on one or more sides of the base steel plate, and a Ni—Fe diffusion layer formed between the base steel plate and the nickel layer,
• the Ni—Fe diffusion layer includes 0.3 to 25 wt % of Ni,
• the nickel layer has a surface contact resistance of 0.8 mΩ or less, and
• the base steel plate has an average roughness (Ra) of 0.5 to 1.3 μm and a maximum height (Ry) of 5 to 8 μm.