Since the invention of lead-acid batteries by French scientist Prante in 1859, lead-acid batteries have been widely used in various important fields such as transportation, communication, electricity, railways, mines, ports, national defense, computers, scientific research, etc. due to their advantages of high safety, low price, and high reuse rate. They are currently the world's largest production and most widely used type of battery.

At the same time, lead-acid batteries also have various advantages in application, such as low price, mature technology, excellent high and low temperature performance, stability and reliability, high safety, and good resource reuse. The market competitive advantage is very obvious. As of 2020, the market size of lead-acid batteries in China reached 165.9 billion yuan, a year-on-year increase of 4.65%.

With the continuous increase in market share of lead-acid batteries, there is a significant amount of energy consumption in their production and recycling processes, as well as serious environmental pollution caused by the scrapping of billions of batteries every year. How to maintain and repair aging lead-acid batteries, and how to improve their efficiency and lifespan have become a common focus of attention for countries around the world.

It is understood that in developed countries in Europe and America, there are only hundreds of thousands of employees engaged in the maintenance and repair of lead-acid batteries, as well as the recycling and reuse of waste batteries, with annual profits of hundreds of millions of dollars. In Japan, there are over 100000 employees engaged in lead-acid battery industry, with annual profits reaching hundreds of millions of dollars.

In China, in order to promote energy conservation and environmental protection, with the approval of the State Council, a consumption tax of 4% will be levied on lead-acid batteries starting from January 1, 2016. At the same time, in the "Technical Policy for the Prevention and Control of Waste Battery Pollution" jointly issued by the State Environmental Protection Administration, the National Development and Reform Commission, the Ministry of Construction, the Ministry of Science and Technology, and the Ministry of Commerce, it is clearly pointed out that in order to prevent waste lead-acid battery pollution, scientific and technological research on waste battery resource regeneration is encouraged, and economic and efficient waste battery resource regeneration processes are developed to improve the resource regeneration rate of waste batteries.

Experts have shown that the main reason for the performance degradation and early scrapping of lead-acid batteries is the internal generation of lead sulfate crystals during the battery use process, which cover the surface of the electrode plate, leading to an increase in battery internal resistance and a decrease in battery storage capacity, ultimately leading to the early end of battery life. Practice has proven that using lead-acid battery repair and maintenance technology can truly extend the service life of batteries, save battery usage costs, reduce waste such as lead and dilute sulfuric acid, as well as CO2 emissions, and protect precious resources. It is a new generation of energy-saving and environmental protection technology that adapts to society and sustainable development.

It is not difficult to see that in today's increasingly severe global energy consumption and battery pollution, how to solve the rational reuse of waste batteries, use lead-acid battery repair technology to extend their lifespan, reduce the increase in scrapped batteries, build a sustainable development path for batteries, and promote the application and promotion of lead-acid battery repair and maintenance technology and equipment have extremely profound historical significance.

The repair and maintenance technology of lead-acid batteries can turn waste batteries into treasures, which is in line with the latest national policies and new development directions. While generating huge economic benefits, it also implements the basic national policy of "energy conservation and emission reduction", and makes contributions to protecting the natural environment on which humans rely for survival. It will definitely be widely respected in the future.