Why do pure electric vehicles use higher-cost lithium-ion batteries instead of lower-cost lead-acid batteries?

Lead-acid batteries are used extensively in the batteries of electric bicycles and fuel vehicles, so why do pure electric vehicles use high-cost lithium-ion batteries instead of lower-cost lead-acid batteries? There are reasons for this. First of all, in terms of waterproof and dustproof, lead-acid batteries are far less powerful than lithium-ion batteries. It is necessary to understand that the battery of a pure electric vehicle is generally placed on the chassis, so in the daily driving process, it is inevitable to encounter bumps and bumps and driving in water, which requires the battery to have good waterproof and dustproof performance, and the lithium battery reaches the IP67 level. Batteries are safer than lead-acid batteries. The second is volume. Because the energy density of lithium-ion batteries is relatively high, under the same power condition, the volume of lithium-ion batteries is only 2/3 of that of lead-acid batteries, and the weight is only 1/3 of that of lead-acid batteries. The reduction in power battery pack power means To improve the endurance of the vehicle. Finally, there is the life span. Lead-acid batteries generally only support 400 times of deep charge and deep discharge, with a lifespan of only two years; while lithium-ion batteries can support cyclic discharge more than 3000 times, and the SOC can still be above 70%, and the lifespan can reach 3-8 years. . To understand that cars are products that require long-term use, so the longer-life lithium-ion batteries are of course more popular. However, lead-acid batteries are still very popular in low-speed vehicles or electric bicycles that do not have strict requirements on volume, weight and lifespan. 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: Why do lithium-ion batteries need to be pre-charged?