Patent ID: 9093713
Filing Date: 2015-07-28
Classification: C22C,C22F,H01M,Y02E

Abstract:
1. A method for producing a lead-base alloy grid for a lead-acid battery, comprising: casting a Pb—Ca—Sn alloy grid containing 0.06% by mass or less of calcium, performing natural aging of the Pb—Ca—Sn alloy grid, and performing heat treatment of the Pb—Ca—Sn alloy grid after conducting the natural aging, the heat treatment being conducted in a two step process including a first heat treatment step and a second heat treatment step, wherein the first heat treatment step is conducted at a temperature of 40° C. to 110° C. for a period of at least 0.5 hours, wherein the second heat treatment step is conducted at a temperature of 90° C. to 140° C. for a period of 0.5 hours to 10 hours, wherein the first heat treatment step is conducted at a lower temperature than the second heat treatment step, and wherein the natural aging is conducted for a period of 0.5 hours to about 3 hours.