Analyze the types and specifications of cylindrical lithium-ion batteries

What are the models and specifications of cylindrical lithium-ion batteries? There are three important lithium-ion battery packaging: cylindrical, square and flexible packaging. There are many types of cylindrical lithium-ion batteries, such as 14650, 17490, 18650, 21700, 26650, etc. Cylindrical lithium-ion batteries are very popular among lithium-ion battery companies in Japan and South Korea. What are the types and specifications of cylindrical lithium-ion batteries? Cylindrical lithium-ion battery models Cylindrical lithium-ion batteries are divided into lithium cobalt oxide, lithium manganese oxide, and ternary materials. The three batteries have their own advantages and are widely used in notebook computers, digital cameras, lighting fixtures, toy products, power tools, portable energy and other fields. 1.10440 battery The 10440 battery is a lithium ion battery with a diameter of 10mm and a height of 44mm. Its size and are not the same. We usually call it a battery. Such as flashlights, mini speakers, power amplifiers, etc. 2.14500 battery 14500 battery is a lithium-ion battery with a diameter of 14 mm and a height of 50 mm. We are called the battery 5 size. The battery is 3.7V and 3.2V. The rated capacity is very small, slightly larger than the 10440 battery, generally 1600mah, with superior discharge performance. Important consumer electronic products in the application field, such as wireless audio, electric toys, digital cameras, etc. 3.16340 battery The 16340 battery is a lithium-ion battery with a diameter of 16mm and a height of 34mm. This kind of battery is often used in flashlights, LED flashlights, headlights, laser lights, illuminators, etc. because the height of the ruler is relatively short and the capacity is not very small. 4.18650 battery The 18650 battery is a lithium-ion battery with a diameter of 18 mm and a height of 65 mm. Its biggest feature is that it has a very high energy density, almost reaching 170 watts/kg, so the battery is very cost-effective. We often see The most is the battery, because it is a relatively mature lithium-ion battery with good quality in all aspects of system stability. It is widely used in the case of about 10KWH battery capacity, for example, in mobile phones, notebook computers and other small electrical appliances. 5.21700 battery The 21700 battery is a lithium-ion battery with a diameter of 21 mm and a height of 70 mm. Because of its size, space utilization, energy density, battery cells and the system can be improved, its volumetric energy density is much higher than that of the 18650 battery. Used in digital, electric vehicles, balance, solar car lithium-ion battery lights, LED lights, power tools, etc. Structural characteristics of cylindrical lithium-ion batteries (1) An ordinary cylindrical lithium-ion battery is composed of a shell, a cap, a positive electrode, a negative electrode, a diaphragm and an electrolyte. Generally speaking, the battery case is the negative electrode of the battery, and the battery cover is the positive electrode of the battery. (2) The important difference of the power cylindrical lithium-ion battery lies in the conductive connection structure of the battery. Because the power lithium battery generally uses high current, it is necessary to specially design the high current structure. In order to facilitate the connection, a special connection combination device is designed based on the original cylindrical lithium-ion battery structure. Cylindrical lithium-ion batteries adopt a relatively mature winding process, which has a high degree of automation, stable product quality and relatively low cost. The advantages of cylindrical lithium-ion batteries Cylindrical lithium-ion batteries have formed a series of internationally unified specifications and models, and the technology is relatively mature and suitable for continuous mass production. The cylinder has a large specific surface area and good heat dissipation effect. Cylindrical lithium-ion batteries are generally sealed batteries, and there are no maintenance problems during use. The pressure of the lithium-ion battery casing is high, and there will be no battery expansion phenomena such as square shape and flexible packaging during use. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Comparative analysis of the advantages and disadvantages of lithium iron phosphate batteries and ternary lithium ion batteries