Lithium batteries and lead-acid batteries are the most commonly used electric car batteries, with the update of electric car battery technology, the development and application of lithium batteries are rising year by year. However, it is only rising, limited by the performance of lithium batteries, cost performance and other reasons want to replace the position of replacing the traditional lead-acid battery big brother has a long way to go.
So, what is the difference between lithium batteries and lead-acid batteries? Let's learn about the difference between lithium batteries and lead-acid batteries for electric vehicles comparison.
1, safety comparison: power lithium batteries (lithium manganate, lithium iron phosphate) materials vary in safety, lead-acid battery technology has been quite mature, higher safety than lithium batteries.
2, environmental protection comparison: lithium batteries do not pollute, while lead-acid batteries have heavy metal lead pollution. So the use of lead-acid battery electric cars will still pollute the environment.
3、Price comparison: the price of lithium battery with the same capacity in the market is more than double of lead-acid battery. This is the reason why the electric car using lithium battery is more expensive.
4、Energy comparison: The mass ratio, volume ratio and energy ratio of lithium battery are higher than that of lead-acid battery by about 40%.
5, self-discharge rate comparison: lithium battery monthly self-discharge is less than 3%, while the lead-acid battery 15 ~ 30%, a large difference.
6, life comparison: the current general lithium iron phosphate charging 1500 times, no memory effect, about 85% of the storage capacity after charging 1500 times, while the lead-acid batteries for about 500 times, the storage capacity will also be significantly reduced, and the memory effect is obvious. So the use of lithium battery electric car battery life will be longer.
7, voltage platform comparison: lithium battery voltage platform are greater than 3V, lead-acid battery is 2V.
8, discharge characteristics comparison: simply put the same capacity of the battery, high current discharge, lithium batteries than lead-acid batteries to discharge about 30% more electricity.
9, durability: lithium batteries are more durable, good resistance to vibration, fully charged state of the battery security fixed, slow consumption, charging and discharging more than 500 times, and no memory, the general life of 4-5 years. Lead-acid batteries are generally within 400 times of deep charging and discharging, with memory and a life span of about two years. If the maintenance-free lead-acid battery is used, it should be noted that its battery loses little water and generally does not need to add distilled water in use.
From the above analysis of the difference between lithium batteries and lead-acid batteries for electric vehicles, the lithium battery model is better than the lead-acid model in terms of range, battery life, environmental protection, vehicle handling or charging convenience, while the biggest advantage of the lead-acid model is the price.
