What are the layout features and advantages of cylindrical lithium-ion battery packs?

Cylindrical lithium-ion batteries are divided into lithium cobalt oxide, lithium manganese oxide, and ternary materials. The three material system batteries have different advantages. In terms of battery application, the cylindrical 18650 lithium-ion battery is widely used. It is currently used in notebook computers, walkie-talkies, portable DVDs, instrumentation, audio equipment, model aircraft, toys , Video cameras, digital cameras and other electronic equipment, lighting equipment, miner’s lamps, alarm systems, and other industries, while the 18650 lithium-ion battery pack composed of it is also applied to the power supply of electric vehicles and other industries. Layout features of cylindrical lithium-ion battery packs: (1) A common cylindrical battery pack consists of a shell, a cap, a positive electrode, a negative electrode, a barrier and an electrolyte. Generally, the outer casing of a lithium ion battery is the negative electrode of the battery, the cap is the positive electrode of the battery, and the nickel-plated steel plate is recycled from the battery casing. (2) The important difference of the power cylindrical lithium-ion battery lies in the conductive connection layout of the battery, because the power lithium battery generally uses a large current and requires a special high-current layout design. In order to facilitate the connection, in the basic layout of the original cylindrical lithium-ion battery pack, a special connection combination device is designed, such as designing internal threads or studs on the positive and negative electrodes of the battery, and the conductivity is also enhanced. Advantages of cylindrical lithium-ion battery: the production process of cylindrical lithium-ion battery pack is mature, the PACK cost is low, the battery product yield and the consistency of the lithium-ion battery pack are high; because the lithium-ion battery pack has a large heat dissipation area, its heat dissipation performance is excellent It is a square battery; a cylindrical battery is convenient for a variety of combinations, and is suitable for a substantial mechanism for the space design of electric vehicles. However, cylindrical batteries are generally packaged in steel or aluminum shells, which are heavier and have relatively low specific energy. With the further expansion of the electric vehicle market and continuous improvement in the requirements for cruising range, vehicle companies have put forward higher requirements for power lithium-ion batteries in terms of energy density, manufacturing costs, cycle life, and product additional attributes. Under the premise that the scale of the raw materials has not yet been hugely broken, appropriately increasing the volume of cylindrical lithium-ion batteries to obtain more battery capacity has become a groping bias. 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: What are the important reasons for the excessive internal resistance of lithium-ion batteries?