Lead-calcium-tin-copper-silver-sodium rare earth grid alloy, positive grid and lead-acid storage battery

The invention discloses a lead-calcium-tin-copper-silver-sodium rare earth grid alloy, a positive grid and a lead-acid storage battery, and belongs to the technical field of lead-acid storage batteries. On the first aspect, the invention relates to a positive grid, and the grid contains 0.03 wt%-0.2 wt% of rare earth elements; wherein the rare earth element is a composition of lanthanum, cerium, samarium and yttrium in any ratio. In the second aspect, the invention provides a preparation method of the positive plate grid, and rare earth elements are used in the method. On the third aspect, the invention provides the lead-acid storage battery, and the positive plate grid is used in the lead-acid storage battery. The lead-calcium-tin-copper-silver-sodium rare earth grid alloy designed by the invention not only can effectively reduce the impedance of an oxide film on the surface of a grid and improve the deep cycle performance, but also can promote the growth of lead dioxide, improve the corrosion resistance of