In the 150-year history of lead-acid batteries, technological progress has been the driving force for their sustainable development. It has roughly experienced the following three stages of development:
①The earliest open-type lead-acid battery of open-type (rich-liquid-type) battery has a flowing electrolyte inside. Gas and acid mist will be precipitated during charging and discharging. The internal sulfuric acid solution is easy to overflow during transportation and pollute the environment. There is a certain degree of danger, such as acid corrosion of clothes. Skin burns, equipment damage, etc., and due to the loss of water during charging, the battery needs to be frequently added with water for maintenance (frequently once a month), which is inconvenient to use.
② Flooded maintenance-free storage battery In the 1970s, flooded maintenance-free storage battery appeared. The use of lead-calcium alloy reduces the speed of water decomposition, which solves the problem of battery charging loss to a certain extent. -During the five-year service period, there is no need to add water, but the battery needs to be installed upright, and there is still a small amount of gas and acid mist overflow during charging. It is mainly used for starting vehicles such as automobiles.
③Valve-regulated sealed and maintenance-free battery In 1971, the American Gates Company invented the Absorbent Glass Mat technology, which is the AGM technology of the valve-regulated battery (VRLA). This technology practically solves the problem of compound circulation of oxygen inside the battery, enables lead-acid batteries to realize the dream of sealing and leak-free for more than 100 years, ends the era of lead-acid batteries opening, and creates a history in the development of lead-acid batteries. A new milestone. The valve-regulated sealed maintenance-free battery uses the adsorption-type AGM partition and the principle of gas recombination. The oxygen generated during the charging process can be recombined into water inside the battery. The sealed structure solves the battery leakage, corrosion and maintenance problems , The battery performance is greatly improved.
