Pb-Sb grid material for storage battery

Abstract

The invention provides a Pb-Sb grid material for a storage battery, which comprises the following components in percentage by weight: 0.5-3.5 percent of Sb, 0.01-2 percent of La as a rare earth element and the balance of Pb. The rare earth element is added into Pb-Sb alloy, thereby leading a crystal grain of the alloy to become small and even, solving the problem of the thermal cracking of the Pb-Sb alloy and obviously improving the toughness, the aging strength and the erosion resistance of the alloy. The added rare earth element obviously restrains the growth of a Pb (II) oxide film and reduces the resistance of the Pb (II) oxide film, thereby improving the charge-discharge performance and the deep-cycle performance of the storage battery. A Pb-acid battery grid assembled electrocar battery produced by the alloy has the advantages of erosion resistance, deep cycle, large current discharge and long service life.

Description

Technical field:

[0001] The invention relates to the field of metallurgy, in particular to alloys, in particular to a lead-antimony grid material for storage batteries. Background technique:

[0002] With the shortage of energy, electric bicycles and hybrid vehicles are more and more popular in the market, but the charging and discharging performance and deep cycle performance of batteries are not very satisfactory at present. In this regard, countries all over the world are researching and developing high-performance batteries to solve problems such as reliability, maintainability, deep cycle, and corrosion resistance of lead-acid batteries. As the main part of the battery, the grid material plays an important role in the development process of the battery.

[0003] At present, the grid material widely used in lead-acid batteries is lead-antimony alloy. Its main defect is that the alloy has poor mechanical properties and low mechanical strength, and the surface of the grid...