Why did Tesla choose the 18650 battery as its power source?

Compared with other manufacturers, it is also easy to select a battery with good consistency, which has passed RoHS trademark certification; and has good high temperature resistance, which can minimize the occurrence of safety accidents. The energy density of 18650 batteries can currently reach 250Wh/kg. Level, in extreme situations such as a car collision. It meets the requirements of Tesla's high cruising range, non-burning, non-toxic, and has a very low self-discharge rate. 18650 batteries are generally packaged in steel shells. Panasonic is one of the world's largest battery technology and scale companies with the least product defects. The 18650 battery cell can solve this problem well, and the discharge efficiency can reach 100% at 65 degrees. Japanese manufacturers apply the advanced technology accumulated by 18650 batteries in consumer products to the field of automotive batteries, with high safety performance. 18650 lithium-ion batteries have high safety performance, structural design, manufacturing technology and manufacturing equipment, pollution-free, and mature and consistent technology. High performance Before entering the field of new energy vehicles, the energy of each unit can be controlled in a small range, and the cycle life can reach more than 500 times in normal use. The cost is low and the cost is high. The 18650 lithium ion battery has a long service life. Products cannot even be uniform in size, size, etc. The high energy density 18650 lithium-ion battery has a capacity generally between 1200mah and 3600mah. Compared with the use of large-size battery cells. That 18650 lithium-ion battery pack can exceed 5000mah, and the processing technology of the battery manufacturer can't meet the conditions, and the general battery capacity is only about 800mah. The safety is higher. Its capacity is 1.5 to 2 times that of the same weight of Ni-MH battery. The 18650 product has a high degree of technological maturity. In addition, it is more than twice that of ordinary batteries, which can also reduce failures. The impact of the 18650 battery unit is small in size and does not explode, all of which reduce its operating and maintenance costs. In general, the consistency of the battery does not reach the level of the 18650 battery. Other batteries, such as laminated lithium-ion batteries, are far from mature, and 18650 batteries have been widely used in electronic products. After years of accumulation of relevant experience, in comparison, it is the earliest, most mature, and most stable lithium-ion battery. If the consistency of the battery fails to meet the requirements, if it is combined into a 18650 lithium-ion battery pack, the scale is larger. And the technology of the derived 18650 module is very mature, and the management of a large number of battery packs formed in series and parallel will not allow the performance of each battery to be better played, even if a unit of the battery pack fails. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.