The invention discloses a storage battery grid with refined
alloy grains and a manufacturing method thereof, and belongs to the technical field of storage battery manufacturing. The storage battery grid adopts a lead-
tin-silver-
lanthanum-
cerium alloy, furthermore, an
antimonide is added, and the grains are refined, so that the
corrosion resistance and strength of the
alloy are improved, and the performance of a storage battery is improved. The manufacturing method comprises the steps that firstly, mutual melting is carried out on grain-changing agents which cannot be easily molten in combination with ultrasonic
waves under the conditions of high temperature and high shearing and stirring, and then the mixture is mixed with a large amount of molten lead, so that the uniform mixing of the grain-changing agents is guaranteed, and segregation is avoided in the solidification process; an alternating
magnetic field is applied in the
ingot casting process, the changed
magnetic field damages the solidification structure of the grains, and the grains are refined; and when the grid is cast, the
magnetic field and the
ultrasonic vibration are adopted at the same time, and the grains are further refined under the double action of the magnetic field and the vibration energy. By adopting the grain refining method, the high-temperature
corrosion resistance of the manufactured grid is improvedby 60%, the capacity, the low temperature performance and the charging acceptance performance of the storage battery are improved and the service life of the storage battery is prolonged correspondingly to different degrees, and the service life is prolonged by 30% or more.