Preparation process of maintenance-free lead storage battery grid lead-bismuth alloy

Abstract

The invention discloses a preparation process of a maintenance-free lead storage battery grid lead-bismuth alloy, wherein the lead-bismuth alloy contains metal lead and metal antimony, the mass percentage of antimony in the lead-bismuth alloy is 0.5+ / -0.1%, and the balance is lead. The grid using the lead-bismuth alloy does not have the problems of serious water loss, large self-discharge, large and no corrosion resistance particles and poor charging acceptance capability, which greatly improves the service life and quality of the battery.

Description

technical field [0001] The invention relates to a grid alloy of a maintenance-free lead-acid storage battery, in particular to a preparation process of a maintenance-free lead storage battery grid lead-antimony alloy. 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. The traditional grid alloys are mainly lead-calcium and lead-antimony, which are helpful to the casting and conductivity of the grid, but they generate new problems. First, the main disadvantages of lead-antimony grid alloys are: (1 ) reduces the hydrogen evolution potential in the battery, which makes the battery lose water seriously, and can only be used for open-type batteries, not maintenance-free batteries. (2) large self-discharge, (3) will produce toxic gas SbH ...

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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

The traditional grid alloys are mainly lead-calcium and lead-antimony, which are helpful to the casting and conductivity of the grid, but they generate new problems. First, the main disadvantages of lead-antimony grid alloys are: (1 ) reduces the hydrogen evolution potential in the battery, which makes the battery lose water seriously, and can only be used for open-type batteries, not 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; Lead to low deep cycle performance; (4) Poor creep resistance; (5) Calcium is difficult to add to the alloy