Aluminum alloy for battery water-cooling plate and preparation method of aluminum alloy

The invention relates to an aluminum alloy for a battery water cooling plate and a preparation method thereof, the aluminum alloy comprises the following materials in percentage by mass: 4-6% of Ni, 0.4-0.6% of Mn, 0.4-0.8% of Fe, 0.5-0.8% of Si, 0.5-0.8% of Mo, 0.2-0.3% of Zr and the balance of aluminum and inevitable impurity elements, the content of each impurity element is less than or equal to 0.1%, and the total amount of the impurity elements is less than or equal to 0.3%. The AlFeMoSi quaternary high-temperature stable phase is innovatively introduced, the high-temperature strength of the alloy is further improved, the melting point of the precipitated phase is larger than 600 DEG C, the high-temperature welding technology is not affected, meanwhile, part of Fe and Si elements are consumed through addition of Mo, the allowable dosage of the Fe and Si elements in the alloy is increased, and the casting alloy cost is effectively reduced. 本发明涉及一种电池水冷板用铝合金及其制备方法，包括质量百分比的以下材料：Ni4-6％、Mn0.4-0.6％、Fe0.4-0.8％、S