Analysis of the difference between aluminum shell-packed lithium batteries and soft-packed lithium batteries

●Shell: The aluminum shell pack lithium battery has a firm shell and is not easy to deform; the soft pack lithium battery shell is soft and easy to deform. ●Technology: The aluminum shell technology for packaging lithium batteries with aluminum shells is very mature and does not require high inflation rate, expansion rate and other indicators, and there are no technical barriers in the industry. ; The soft-packed lithium battery is easy to expand during the battery cycle, and there are still many problems that have not been solved at present. ●Cost: The aluminum shell battery has a high degree of automation, low manufacturing cost, and simple production. Currently, it has been produced nationwide; the aluminum-plastic film material of the soft-packed lithium battery still needs to be imported. ●Market: Aluminum shell battery is easy to form scale effect, product qualification rate and cost are easy to control, and profit in the market field is considerable; soft-pack lithium battery is mainly used in the middle and high-end market, and the profit rate per unit product is relatively high. The profit is higher than that of the aluminum shell battery, and the capital return cycle is also short. ●Technology: The aluminum shell packaging lithium battery adopts laser sealing technology, which has good sealing performance and prevents aging and air leakage at the sealing place. At the same time, the air pressure is not easy to discharge in the sealed state, which increases the potential safety hazard. For example, a short-circuit violent reaction of a lithium battery pack generates a lot of heat, which causes the electrolyte to decompose and vaporize. The lithium battery pack will bulge up, the gas cannot be dissipated, and the lithium battery pack will explode to a certain extent. ●Compared with soft-packed lithium batteries, aluminum shell-packed lithium batteries have a harder outer shell, which is an advantage and disadvantage. After sealing, the impact of accidental explosions is relatively new. ●The soft-pack lithium battery adopts the hot-melt process, and the burst pressure is much lower than that of the aluminum shell battery. In the event of a safety accident such as an internal short circuit, the battery is easy to bulge and exhaust, reducing the risk of explosion. ●Energy density: The mass and energy density of soft-packed lithium batteries is higher than that of aluminum shell batteries. The battery statement of the same size: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one: Resolve power lithium What are the important methods for battery thermal runaway?