With the development of global diversification, our lives are constantly changing, including all kinds of electronic products we come into contact with, so you must not know some of the components of these products, such as 21700 lithium batteries. In order to promote the development of new energy vehicles, subsidies for new energy vehicles have begun. As the core components of new energy vehicles, power batteries have always been an important field of new energy vehicles. In the power battery, the most attention is undoubtedly the lithium-ion battery. Lithium-ion batteries have high energy density, their capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight, and their self-discharge rate is low. In addition, lithium-ion batteries have almost no "memory effect" and no toxic substances. These advantages of lithium-ion batteries make them widely used in the field of new energy vehicles.
Today, the strength of the auto market is evident to all. Tesla replaced the traditional 18650 batteries with 21700 lithium batteries to improve cost performance, win more sales, and strive to become a pioneer of new energy vehicles. The energy density of the 21700 lithium-ion battery system is about 300Wh/kg, which is more than 20% higher than the energy density of the 18650 battery originally used. The battery capacity is increased by 35%, but the system cost is reduced by about 10%. 18650 batteries originally referred to Ni-MH and Li-Ion batteries. Since NiMH batteries are now rarely used, they are now called Lithium-Ion batteries.
It is understood that the market has already started research on the 21700 battery and is committed to achieving the highest energy density and lowest cost battery among mass-produced batteries. The power density of the 21700 lithium battery is currently the highest in the world, and the price will be more approachable.
Battery 21700 is a cylindrical battery model, specifically: 21 refers to a cylindrical battery with an outer diameter of 21mm; 700 refers to a cylindrical battery with a height of 70.0mm. This is a new model designed to meet the longer driving range of electric vehicles and improve the efficient use of vehicle battery space. Compared with the common 18650 cylindrical lithium battery with the same material, the 21700 has more than 35% higher capacity. According to the comparison data of 18650 battery and 21700 battery, the specific energy of 21700 battery is about 20% higher than that of 18650 battery, reaching 300Wh/kg, while maintaining the high reliability and stability of 18650 battery. in terms of cost. The capacity of the 21700 lithium rechargeable battery is about 35% higher than that of the 18650 battery. The increase in battery capacity reduces the number of batteries and accessories. The cost of the entire system is also reduced, with manufacturing costs down 9%.
Whether 21700 lithium batteries can be quickly marketed to achieve industrial production depends on the R&D technology and manufacturing process of battery companies. The demand for application terminals and the impact of the introduction of relevant national policies cannot be ignored. Its development path requires more than the efforts of battery companies. One of the major reasons why new energy vehicles are difficult to be fully accepted is the cruising range, so the improvement of energy density is the top priority. Switching to 21700 type batteries is in line with the future direction. With the upgrade of battery technology and the development of the market, the quality, production capacity and cost of 21700 batteries will continue to improve, accelerating the process of industrialization and commercialization. In the process of research and design, there are bound to be various problems, which requires our scientific researchers to constantly sum up experience in the design process, so as to promote the continuous innovation of products.
