With the successive industrial revolutions, the society is making continuous progress, and science and technology are also innovating day by day. At the same time, the energy problem has become one of the major challenges facing mankind in the next 50 years.

Since the reform and opening up, China's energy industry has developed rapidly. At the same time, the increasing demand for energy and the irrational energy structure have led to the increasing consumption of fossil fuels and the increasingly prominent environmental pollution problems, which have seriously restricted the development of China's social economy. The development of low-carbon, energy-saving and environment-friendly new energy and the research and development of new energy storage technologies, materials and equipment systems supporting the new energy have become the only way for the development of new energy in China and the world.

Taking this opportunity, Kunming Polytechnic Hengda Technology Co., Ltd. (hereinafter referred to as "Kunming Polytechnic Technology") conforms to the needs of the times, relies on its own patented technology, innovates the new technology of lead-carbon batteries, develops new energy storage materials and new energy storage batteries, and puts them on the market, strongly promoting the development strategy of new energy in Yunnan and the country.

Independent innovation and development of new energy storage technology

Established in August 2000, Kungong Science and Technology is a key high-tech enterprise of the Torch Plan of the Ministry of Science and Technology of the People's Republic of China, integrating the research and development of new nonferrous metal materials, product design, processing and manufacturing, product sales and technical services. Its main business is the research and development, design and industrial production of new energy saving electrode materials and products, new energy materials and energy storage battery products. Since its establishment, with the support of the Party committees and governments at all levels, Kungong Technology has actively expanded and innovated low-carbon green technologies. Since 2008, the scientific research team has been committed to independent research and development of green carbon reduction technology and core products. The high-efficient, energy-saving and consumption-reducing palisade aluminum-based lead alloy composite anode developed by the company is the first in the world, which has changed the history of the traditional lead-based alloy anode used in the hydrometallurgy industry for more than 150 years, and is a major technical breakthrough. The lead alloy consumption has been reduced by 30%, and the energy saving is more than 5%.

Since entering the 21st century, under the pressure of increasing scarcity of fossil energy and serious environmental pollution, solar energy and wind energy are the new energy with the greatest development potential, as well as the "inexhaustible and inexhaustible" clean energy. It is reasonable to invest for a long time and is deeply favored by users, so the development prospect is broad. However, renewable energy such as solar energy and wind energy has very obvious intermittent characteristics, and its shortcomings such as discontinuity, uncontrollability and instability lead to the limitations of direct utilization, which is the key bottleneck of vigorously developing. Therefore, people hope to find a way to store electric energy, that is, to store it when the power is surplus and release it when the power is short, so as to meet the needs of real-time balance between supply and demand. Energy storage, especially large-capacity energy storage, has become the key supporting point of the energy revolution and plays an important strategic role in the multi-energy complementary system.

Professor Guo Zhongzhong, the founder of Kungong Science and Technology, and his scientific research team are well aware that energy storage technology is a key link in the implementation of the national energy revolution, a major strategic requirement to ensure energy security, implement energy conservation and emission reduction, and promote the green and low-carbon development of the whole society, and has an irreplaceable role in effectively promoting the energy revolution. To this end, Kungong Science and Technology Co., Ltd. continues to carry out scientific and technological revolution and innovation around energy storage technology, overcome difficulties, solve technical problems, and develop new long-term energy storage technology.

The first large-capacity lead-carbon long-term energy storage battery technology

In recent years, China has continuously strengthened the regulation and guidance of electrochemical energy storage technology. In 2010, the development of energy storage was written into the bill for the first time. In March 2022, the National Development and Reform Commission and the National Energy Administration jointly issued the Implementation Plan for the Development of New Energy Storage in the "Fourteenth Five-Year Plan" to promote the rapid, high-quality and large-scale development of new energy storage. The domestic energy storage technology has been continuously developed, especially the lead-carbon battery energy storage technology in electrochemical energy storage, which has made great breakthroughs and improvements. The large-capacity long-term energy storage technology is an important link to enhance the security and flexibility of the energy system supply and improve the comprehensive efficiency, and is the key technology to support the efficient and safe energy transformation in the future. Whether it is new energy vehicles or new energy power generation, the core pain point is energy storage.

Professor Guo Zhongzhong, the founder of Kunming University of Technology, has summarized the advantages and disadvantages of lithium-ion batteries and conventional lead-carbon batteries by taking advantage of his professional advantages in metallurgical and electrochemical research and application, summarized and drew lessons from the research and application status of electrochemical energy storage batteries at home and abroad, and combined with the company's years of experience in producing lead alloy anodes, especially the first low-carbon green aluminum-based lead alloy composite anode, First of all, starting with the core grid material preparation technology of lead-carbon batteries, the company's original aluminum-based lead alloy composite material was applied to conventional lead-carbon batteries to replace the original lead alloy grid (see the figure below), and the new large-capacity lead-carbon long-term energy storage battery preparation technology and products were pioneered, which greatly expanded the market application prospects and space of new energy storage. In 2022, Kungong Technology will soon build the first industrial production line of 1GWh large-capacity lead-carbon long-term energy storage battery at home and abroad.

Advantages and characteristics of large-capacity lead-carbon long-term energy storage battery:

1. Large single capacity (500Ah/piece), small number of groups, convenient for battery system management, monitoring and maintenance;

2. The production process of large-capacity battery is different from that of conventional battery, which saves multiple processes, and there is no process of plate splitting and casting and welding, which reduces lead dust and smoke pollution in the workshop, thus saving equipment investment, reducing raw material consumption and occupational health hazards;

3. Recycling and disassembly is more convenient and safe, with higher residual value and lower use cost;

4. Better charge and discharge receiving capacity: after 100% deep discharge, charge at 2.35V/monomer constant voltage current limiting 0.15C, and discharge efficiency is more than 98%;

5. Temperature adaptability of overcharge and discharge performance: the operating ambient temperature range is - 40 ℃~+60 ℃;

6. Low self-discharge electrode: the residual capacity is more than 99% after standing for 7 days and more than 90% after standing for 60 days;

7.70% D0D cycle life is more than 4000 times;

8. The cost per kilowatt hour of energy storage battery is less than 0.5 yuan/KWh.

Large capacity lead-carbon battery has broad application prospects

With the proposal of the Kyoto Agreement and the Paris Agreement, countries around the world have reached an agreement on the concept of carbon reduction. The progress of science and technology has also led to the gradual implementation of carbon reduction through new energy technologies, and the "double carbon" concept of global carbon peak and carbon neutrality has emerged, and the wave of energy substitution has also come. In order to achieve the strategic goal of "carbon peak, carbon neutral", it is urgent to develop low-cost and efficient long-term energy storage technology as a medium to regulate the peak and valley of power output and improve the grid's acceptance of new energy such as photovoltaic and wind power.

From the perspective of China's future energy structure, the premise to promote the rapid development of wind power and photovoltaic power generation is to solve the bottleneck problem of large-scale access of wind energy, solar energy and other new energy to the grid, so as to realize the complementary and coupling utilization of multiple energy. Therefore, we must take the development of green electrochemical energy storage technology as the medium and guide for the development of new energy. Electrochemical energy storage has the advantages of being less affected by geographical conditions, short construction period, and flexible application in all aspects of the power system and other various scenarios. Its main products include lithium-ion batteries, lead-carbon batteries, and sodium-sulfur batteries. It is currently the most widely used energy storage technology product with the greatest development potential. Since the second half of 2020, the domestic carbon peak and carbon neutral policies have occurred frequently, and the cost of battery and wind, light and new energy power generation has decreased, which is good for both supply and demand, and the energy storage market is bound to usher in high growth.

From 2016 to 2020, electrochemical energy storage ushered in a small upsurge of development, with the global installed capacity increased from 1.8GW to 13.1GW, with a compound annual growth rate of 64.93%; Domestic installed capacity increased from 0.2GW to 2.8GW, with a CAGR of 84.37%. Among them, lithium battery energy storage accounts for the highest proportion (80.6%), and lead battery energy storage is an important part (17.8%). However, lithium-ion batteries still have problems in terms of safety, cost and operating temperature range. At the same time, the tight supply of lithium nickel resources has led to the price rise of lithium nickel and other metals, and the lithium battery recovery technology is not mature, which has limited the scale application of lithium ion energy storage batteries.

As an important part of the future energy storage technology, lead-carbon battery has the advantages of mature production process, low production cost, low raw material cost, safety and stability. With the continuous improvement of performance and technological progress, it will also show its absolute advantages in the field of energy storage in the future, such as large capacity, rich raw material reserves, recyclable and easy to manufacture. At the same time, the 99% recovery rate of lead-carbon batteries and strict regulations on lead environmental emissions have greatly improved the environmental friendliness of lead-carbon batteries and ensured a strong economic, technical and policy environment to support the rapid and long-term development of lead-carbon batteries. The global lead-carbon battery industry will continue to provide reliable and high-performance batteries to promote global electrification and achieve the goal of decarbonization of the whole society.

According to the prediction of China Photovoltaic Industry Association, during the "Fourteenth Five-Year Plan" period, the annual average installed capacity of photovoltaic wind power in China will be 150GW, at least 800GW by 2030, and at least 3000GW by 2060. According to the calculation of 10% to 20% allocation of energy storage, during the "Fourteenth Five-Year Plan" period, the average annual new installed capacity of photovoltaic wind power industry is 15GW/47GWh to 30GW/94GWh. According to the analysis, it is expected that the global new energy storage demand will reach 163GW/511GWh in 2025, the energy storage market space will exceed 600 billion, and the five-year compound growth rate will be 90%. In the long run, it is expected to reach trillion market space. Among them, large-capacity lead-carbon batteries have the most potential for energy storage, with a market of several trillion dollars.

It can be inferred that the field of energy storage is like a big cake. You can get as much cake as you have. The new type of lead-carbon long-term energy storage battery of Kunming Industrial Technology Co., Ltd. is bound to have a bright future