Why do pure electric vehicles use energy storage lithium batteries instead of lead-acid batteries?

Speaking of electric vehicles, we all know that they use motor batteries and electric control. Whether low-speed or pure electric vehicles, they are all electric vehicles but have different treatment. The vehicles use batteries while pure electric vehicles use lithium batteries instead of Lower-cost lead-acid batteries, from the perspective of environmental protection, lithium batteries are more environmentally friendly than lead-acid batteries. 1. Energy density The energy density of lead-acid batteries is about 5070wh/g, while the energy density of energy storage lithium batteries is 200260wh/g, which means that the discharge efficiency and endurance of lead-acid batteries with the same weight of the two batteries The capacity is not as high as that of energy storage lithium batteries. Moreover, battery life has always been a rigid demand in the new energy market. If lead-acid batteries are used continuously, new energy vehicles will not be developed. 2. Safety and environmental protection. Based on the two principles, we can easily find that energy storage lithium batteries are safer than lead-acid batteries. Energy storage lithium batteries are also difficult to explode when subjected to external impacts, while lead-acid batteries are relatively dangerous. It is still more dangerous in the face of external pressure or severe impact. If leakage occurs, lead-containing compounds will cause great pollution to the environment. In terms of environmental protection, energy storage lithium batteries are greener in relation to storage batteries and cause little environmental pollution. 3. Performance The discharge performance of lead-acid batteries at low temperature is actually very good. When discharged at sub-zero temperature, the discharge time is more than 90s when the voltage is above 10V, while the low-temperature discharge performance of energy storage lithium batteries is weak. less. The second is the high current characteristics. As far as the current technology of energy storage lithium batteries is concerned, the performance will drop sharply in the process when the instantaneous current is relatively large, which affects daily use and may even cause accidents. 4. In terms of technology, lead-acid batteries are far inferior to energy storage lithium batteries in terms of waterproof and dustproof. The batteries of pure electric vehicles are generally placed on the chassis, so they will inevitably encounter bumps and bumps during daily driving. Soaked. It is clear that the battery must have good waterproof and dustproof performance, so that the energy storage lithium battery that reaches the IP67 level will be safer than the lead-acid battery. 5. The driving kilometer is also a 48-volt battery. In the case of overflowing electricity, both lead-acid batteries and energy storage lithium battery electric vehicles can travel 3,040 kilometers. The speed depends critically on the size of the motor used. 6. Battery life. Lead-acid batteries generally only support 400 times of deep charge and deep room, and their life span is only two years; while lithium batteries can support cycle discharge more than 3000 times, and the performance can still be above 70%, and the life span can also reach 3- 8 years. Of course, if you want lithium batteries to have a long life, they need to be well maintained. Although the market share of energy storage lithium batteries is far less than that of lead-acid batteries, in terms of use, lead-acid batteries are obviously more suitable for low-speed electric vehicles, electric bicycles, and special electric vehicles that are not strict in terms of volume and weight. The scope of pure electric vehicles is not yet in its scope. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to improve the performance of the power lithium battery pack?