A positive electrode of lead-acid storage battery for electric bicycle

Abstract

The invention discloses a lead-acid storage battery positive electrode for an electric bicycle. The positive electrode consists of the following components in percentage by weight: 1.2 to 1.6 percent of Sn, 0.2 to 0.6 percent of Al, 0.01 to 0.02 percent of Bi, 0.02 to 0.08 percent of Ag, 0.02 to 0.05 percent of In, 0.05 to 0.10 percent of Cu, and the balance of Pb.

Description

technical field [0001] The invention relates to the field of electric bicycles, in particular to a positive electrode of a lead-acid storage battery for electric bicycles. 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. [0003] In theory, electric bicycles can choose fuel cells, lithium batteries, nickel-metal hydride batteries, lead-acid batteries, etc. as power sources. The advantages of lead-acid batteries are: (1) low cost, in line with popular requirements; (2) large-scale production, relatively mature technology; (3) no exhaust, zero emission...

AI Technical Summary

Problems solved by technology

Lead-antimony alloys have good mechanical casting properties and deep charge and discharge capabilities, but Sb 3+ Ions are easy to migrate between the separators and deposit on the surface of the negative electrode, thereby reducing the hydrogen evolution overpotential on the negative electrode, making the battery very easy to gas and lose water when it is charged or overcharged, which will cause the battery to dry up prematurely and terminate its life; Although the lead-calcium alloy has the advantages of small gas loss and water loss, and the battery does not need to add water for maintenance, but during the charging process, a layer of high-resistance anode corrosion layer and severe intergranular corrosion are easily grown on the surface of the positive grid.

As a result, the deep charge and discharge performance of the battery is greatly affected, and the service life of the battery is shortened.

Although the above two alloys have their own advantages, they are difficult to meet the long-life requirements of the battery. It is urgent to develop a new type of alloy that can not only eliminate the antimony that is easy to break and lose water, but also avoid the defects that calcium is easy to produce a high-resistance corrosion layer. Antimony-free, calcium-free positive grid alloy