What are the advantages of the 18650 lithium battery that made Tesla choose as the power source?

Tesla electric vehicles are now quite famous, but Tesla's use of 18650 lithium batteries in its early products really makes many users confused. What are the advantages of 18650 lithium batteries that make Tesla choose as a power source? Isn't the failure rate of the densely connected battery packs higher? Is this really the case? On the contrary, the 18650 lithium battery is currently the most mature battery model. In addition to autopilot technology, Tesla is actually very invested in the depth of research on the battery management system BMS. The electric vehicles produced by Tesla are firstly autonomous driving technology, then the management of the battery, and finally the performance of the vehicle. High consistency of process maturity Before entering the field of new energy vehicles, 18650 batteries have been widely used in electronic products. It is the earliest, most mature, and most stable lithium-ion battery. After years of accumulation of relevant experience, Japanese manufacturers have applied the advanced technology accumulated in consumer products in 18650 batteries to the field of automotive batteries. Panasonic is one of the largest battery technology and scale companies in the world. Compared with other manufacturers, its products have fewer defects, large size, and easy selection of batteries with good consistency. In contrast, other batteries such as cascaded lithium-ion batteries are far from mature enough. Many products cannot even be unified in size and size, and the production processes of battery manufacturers cannot meet the requirements. In general, the stability of the battery is not as good as the 18650 battery. If the consistency of the battery does not meet the requirements, a large number of battery series and parallel management will not make the performance of each battery better, and the 18650 battery is a good solution. High safety performance 18650 lithium ion battery has high safety performance, non-explosive, non-combustible; non-toxic, non-polluting, RoHS trademark certification; high temperature resistance performance, 100% power efficiency below 65 degrees. The 18650 battery is usually encapsulated in a steel shell. In extreme cases such as a car collision, the occurrence of safety accidents is reduced as much as possible, so as to achieve higher safety. In addition, the size of each battery of the 18650 is very small, which means that the energy of each battery can be controlled within a small range. Even if one battery in the battery pack fails, it can be reduced compared to using a larger battery. The impact of the failure. The capacity of high energy density 18650 lithium ion battery is generally between 1200mah~3600mah, and the general battery capacity is only about 800mah. If combined with 18650 lithium ion battery pack, 18650 lithium ion battery pack can exceed 5000mah. Its capacity is 1.5 to 2 times that of a nickel-hydrogen battery of the same weight, and its self-discharge rate is very low. The energy density of the 18650 battery can currently reach 250Wh/kg, which meets Tesla's high-range requirements. Low-cost, cost-effective 18650 lithium-ion battery has a long service life, and its cycle life in normal use is more than 500 times that of ordinary batteries and more than twice that of ordinary batteries. The technical maturity, structural design, manufacturing process and manufacturing equipment of the 18650 product, as well as the technical maturity of the derived 18650 module reduce its operation and maintenance statement: Some pictures and content of the articles published on this site are from the Internet, if there is any infringement Please contact to delete the previous article: Relevant regulations that need to be known for import and export of lithium ion batteries