Electric Vehicle Battery Housing uses aluminum alloy as raw material, which has high specific strength, specific modulus, fracture toughness, fatigue strength and corrosion resistance stability. Because aluminum alloy material has low density, non-magnetic, stable alloy phase at low temperature, low specific resistance in magnetic field, good air tightness, and rapid attenuation of induction radiation energy, it is widely used in aviation, aerospace, high-speed train, machinery engine parts, Marine, chemical industry.