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

●Case: The aluminum-packed lithium-ion battery case is firm and not easily deformed; the soft-packed lithium-ion battery case is soft and easily deformed. ●Technology: The aluminum shell technology for packaging lithium-ion batteries in aluminum shell is very mature, and the requirements for indicators such as inflation rate and expansion rate are not high, and there are no technical barriers in the industry. ; The soft-packed lithium-ion battery is easy to expand during the battery cycle, and there are still many problems that have not been solved. ●Cost: The aluminum shell battery has a high degree of automation, low manufacturing cost, and simple processing. It has been produced nationwide; the aluminum-plastic film material of the soft-pack lithium-ion 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 is considerable in the market field; soft-pack lithium-ion battery is mainly for the mid-to-high-end market, and the profit rate per unit product is relatively high. Under the same output conditions, The relative profit is higher than that of aluminum shell batteries, and the capital return cycle is also short. ●Technology: The aluminum shell packaging lithium-ion 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-ion battery pack generates a lot of heat, which causes the electrolyte to decompose and vaporize. The lithium-ion battery pack will swell up, the gas cannot be dissipated, and the lithium-ion battery pack will explode to a certain extent. ●Compared with soft-packed lithium-ion batteries, aluminum shell-packed lithium-ion batteries have a harder shell, which is an advantage and disadvantage. After sealing, the impact of accidental explosions is relatively new. ●The soft-packed lithium-ion battery adopts a hot-melt process, and the burst pressure is much lower than that of an aluminum shell battery. In the event of a safety accident such as an internal short circuit, the battery is easy to blow up and exhaust, reducing the risk of explosion. ●Energy density: The mass and energy density of soft-packed lithium-ion batteries is higher than that of aluminum shell batteries. The battery statement of the same size: 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 one: Solve the power What are the important methods for thermal runaway of lithium-ion batteries?