Lead-acid batteries mainly focus on capacity, and it is the active material that determines the capacity. Lead powder is the most important raw material in the active material of lead-acid batteries
. To a certain extent, the quality of lead powder directly affects the capacity and life of the battery. Generally speaking, the grid material used in maintenance-free batteries is Pb-Ca-Sn alloy. Ca can change the strength of the grid, and the addition of Sn improves the casting performance of the alloy, and at the same time increases the hydrogen evolution overpotential of the grid and improves the corrosion resistance of the grid. At present, domestic manufacturers of storage batteries are not all the same in choosing the specific gravity of injected sulfuric acid, and some are a little higher. The specific gravity of the injected sulfuric acid directly affects the initial capacity of the battery and affects the service life of the battery. If the specific gravity of sulfuric acid is high, the initial capacity will be higher. Choosing sulfuric acid with a high specific gravity, although the initial capacity of the battery is high, it meets the discharge requirements within a certain period of time, which seems to show that the design capacity of the battery is far beyond the rated capacity, but the corrosion of the grid is intensified. A good battery must have good raw materials and good craftsmanship to ensure it, and it needs to be used and maintained correctly. Anything left will shorten the service life of the battery. During the charging and discharging process of lead-acid batteries, the water in the electrolyte will gradually decrease due to electrolysis and evaporation, resulting in a drop in the electrolyte level. If it is not replenished in time, it may shorten the service life of lead-acid batteries, and distilled water should be refilled in time.
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