[Overview of battery industry development]

The battery manufacturing industry is not only a traditional industry in China, but also an important part of the new energy industry. It is closely related to a number of strategic emerging industries such as new energy vehicles, renewable energy, modern electronic information, new materials, and equipment manufacturing. The battery manufacturing industry is also the most important basic industry in China's national economic construction, which is related to the national economy and the people's livelihood and the foundation for building a well-off society; Battery products have a wide range of applications and play a very important role in adapting to the development of the national economy under the new situation in China, ensuring the strategic needs of national defense, and meeting the diverse needs of the public in work and life consumption. Batteries include physical batteries and chemical batteries. Physical cells are devices that directly convert solar energy, thermal energy or nuclear energy into DC electric energy by using physical effects, such as solar cells, thermoelectric generators, nuclear cells, etc; Chemical battery is a device that directly converts chemical energy into direct current energy. Among batteries, chemical battery is the most important one. Chemical batteries can be divided into primary batteries and secondary batteries according to whether they can be recycled. Among them, primary battery is a battery that can only be used once for active substances, also known as primary battery, such as zinc manganese battery, alkaline manganese battery, etc; The secondary battery can be recharged and recycled, also known as battery. The battery uses the active substance in the battery to produce chemical reaction in the discharge state to output current, and reverse chemical reaction in the charge state to store electric energy.

According to different electrode materials and working principles, batteries are mainly divided into four categories: lead-acid batteries, lithium ion batteries, nickel metal hydride batteries and nickel cadmium batteries. Among them, lead-acid battery has the advantages of high cost performance, large capacity, high power, long life, safety and reliability, and is currently the largest output and most widely used battery in the world; Lithium ion batteries also occupy a certain market share with the advantage of high energy density.