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Why did Tesla choose 18650 lithium-ion batteries?

by:Vglory      2021-03-06
Tesla uses 18650 lithium batteries, which can be processed using the previous processing lines of manufacturers such as Panasonic. In the context of increasingly fierce competition for 18650 lithium batteries used in consumer electronics, the author thinks that manufacturers such as Panasonic are very willing to cooperate with Tesla to upgrade their products, and use the original processing line to improve the processing of power lithium-ion batteries. In addition, industrial processing has a scale effect. When the scale of processed products reaches an order of magnitude, the cost will be greatly reduced. A Tesla requires thousands of 18650 lithium batteries, so the purchase price of a single unit should be kept relatively low. 2. Consistency 18650 lithium battery is an earlier, very mature and stable lithium battery, which is widely used in electronic products, and the annual shipment volume is about several billion. Over the years, Japanese manufacturers have accumulated a lot of relevant experience in the processing technology of 18650 lithium batteries, so that the consistency and safety of the 18650 lithium batteries produced have reached a very high level. In the process of communicating with a professor in the battery industry in the United States, he said half jokingly: if you buy the same batch of batteries from a Japanese manufacturer, and then use your battery charge and discharge detection instrument to detect at the same time They, if you find that the discharge curves measured by different channels are not the same, you should doubt the consistency of your device rather than the battery. In contrast, stacked lithium batteries are far from mature (see Why does the electric vehicle industry not implement standardized batteries?), and even the size, size, and location of the tabs are not uniform. The relevant experience of battery manufacturers is also very good. Insufficient, the consistency of the battery does not reach the level of 18650 lithium batteries. If the consistency of the battery fails to meet the requirements, the management of the battery pack formed by a large number of batteries in series and parallel will be a nightmare. 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 is the correct way to use forklift lithium batteries
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