Rare earth/lead/calcium alloy plumbic acid battery panel grate material and preparation method thereof

Abstract

The invention discloses a rare earth / lead / calcium alloy plumbic acid battery panel grid material. The rare earth / lead / calcium alloy comprises 0.1-5 wt% of rare earth, 90-99 wt% of metal lead and 0.1-5wt% of metal calcium. The invention further comprises a preparation method of the rare earth / lead / calcium alloy plumbic acid battery panel grid material. The method comprises the steps that rare earth, metal lead and metal zinc are melted in a metal pot, rapid solidifying cooling is conducted before pouring is conducted, and the rare earth / lead / calcium alloy plumbic acid battery panel grid material is obtained. The method has the advantages of being simple and efficient, the resistance of a divalent lead compound on the surface of the plumbic acid battery panel grid material is lower, the porosity is higher, the conductivity is improved, and deep circulation performance of a plumbic acid battery is improved fundamentally.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a rare earth / lead / zinc alloy lead-acid battery grid material and a preparation method thereof. Background technique [0002] Lead-acid battery grid materials mainly include lead-antimony alloy and lead-calcium alloy. Lead-antimony alloy has excellent deep cycle performance and mechanical properties, so it has become the most important grid material for lead-acid batteries. However, lead-antimony alloy has poor maintenance-free performance. The hydrogen evolution potential of lead-calcium alloy is 200mV higher than that of lead-antimony alloy. Therefore, the loss of water during battery charging will be greatly reduced, which can make up for the disadvantage of poor maintenance-free performance of lead-antimony alloy. However, the lead-calcium alloy is easy to form a divalent lead compound passivation film with poor conductivity on the surface of the batte...

AI Technical Summary

Problems solved by technology

Lead-antimony alloy has excellent deep cycle performance and mechanical properties, so it has become the most important grid material for lead-acid batteries. However, lead-antimony alloy has poor maintenance-free performance

The hydrogen evolution potential of lead-calcium alloy is 200mV higher than that of lead-antimony alloy. Therefore, the loss of water during battery charging will be greatly reduced, which can make up for the disadvantage of poor maintenance-free performance of lead-antimony alloy.

However, lead-calcium alloy is easy to form a divalent lead compound passivation film with poor conductivity on the surface of the battery grid during charging and discharging, resulting in serious early capacity loss. Key Factors in Maintaining Performance