The Lead Acid Battery is the very commonly used storage battery that uses Lead peroxide (PbO2), Sponge lead (Pb) and Dilute sulfuric acid (H2SO4) as the construction materials. Since the invention of lead acid batteries in the early 19th century, these batteries have become one of the most widely used chemical batteries because of their low cost, low manufacturing cost, large capacity, simple process, reliable performance and strong adaptability.

Sealed lead batteries are widely used in many fields. They can be divided into start-up batteries market, power batteries market and industrial batteries market. The industrial lead acid batteries market can also be divided into energy storage batteries market, emergency or standby batteries market and other batteries market. With the development of telecommunication industry and electric vehicle, electric bicycle, wind energy, solar energy, communications and other industries, its application field will continue to expand, and the market space will become larger and larger.

However, due to the dilute sulfuric acid solution is the main electrolyte in the traditional battery production, it also brings many disadvantages to sealed lead-acid batteries.

- Sealed lead-acid batteries with dilute sulfuric acid as electrolyte have large internal resistance and are easy to heat up during long-term charging, which leads to water loss and failure of batteries.

- Sealed lead-acid batteries have high self-discharge and are not suitable for long-term storage. If they are stored for more than one year, they may damage the batteries.

- Dilute sulfuric acid is easy to be stratified, which leads to the softening of the plate part and the passivation of the lower part, resulting in premature failure of the battery.

- Dilute sulfuric acid is easy to freeze at low temperature and decompose water at high temperature, so sealed lead-acid batteries are not suitable for working conditions below - 20 degrees and above 50 degrees.

- In the production, manufacture and use of sealed lead-acid batteries, corrosive sulfuric acid fog will be produced, which will cause harm to human body and environmental pollution. Waste batteries after failure contain a large amount of lead sulfate, which is prone to environmental pollution.