Lead-tin alloy for long-life lead-acid storage-battery plate grid

Abstract

The invention discloses a lead-tin alloy for a long-life lead-acid storage-battery plate grid, which comprises the following components in mass percentage: 0.7+ / -0.1 percent of metallic tin and the balance of metallic lead. When the plate grid made of the lead-tin alloy is used, the problems of serious water loss, large self-discharged electricity, large grains, no corrosion resistance and poor charge acceptance capability can not exist, the service life of a battery is prolonged to a large extent, and the quality of the battery is improved to a large extent.

Description

technical field [0001] The invention relates to a grid alloy of a maintenance-free lead-acid battery, in particular to a lead-tin alloy of a long-life lead-acid battery grid. Background technique [0002] For lead-acid batteries, pure lead is an ideal corrosion-resistant material in sulfuric acid, but pure lead often cannot meet the requirements of various applications, and the method of alloying is the main method to improve and improve the performance of materials. Traditional grid alloys are mainly lead-calcium and lead-antimony, which are helpful to the casting and conductivity of the grid, but they have derived new problems. First, the main disadvantages of lead-antimony grid alloys are: (1 ) reduces the hydrogen evolution potential in the battery, causing the battery to lose water seriously, and can only be used for open-type batteries, not for maintenance-free batteries. (2) Large self-discharge, (3) will produce toxic gas SbH 3 Second, the problems of lead-calcium g...

AI Technical Summary

Problems solved by technology

[0002] For lead-acid batteries, pure lead is an ideal corrosion-resistant material in sulfuric acid, but pure lead often cannot meet the requirements of various applications, and the method of alloying is the main method to improve and improve the performance of materials

Traditional grid alloys are mainly lead-calcium and lead-antimony, which are helpful to the casting and conductivity of the grid, but they have derived new problems. First, the main disadvantages of lead-antimony grid alloys are: (1 ) reduces the hydrogen evolution potential in the battery, causing the battery to lose water seriously. It can only be used for open-type batteries and cannot be used for maintenance-free batteries. (2) Large self-discharge, (3) will produce toxic gas SbH 3 Second, the problems of lead-calcium grid alloys are: (1) Calcium is oxidized during the casting process, the loss is large, and the content is not easy to control; (2) The crystal particles are large and the corrosion resistance is poor; (3) The charge acceptance is poor, Lead to low deep cycle performance; (4) Poor creep resistance; (5) Calcium is difficult to add to the alloy