Compared with lead-acid batteries, what are the advantages of lithium iron batteries?

Comparison of iron-lithium battery and lead-acid battery (1) Volume and mass: Lead-acid battery is relatively large and heavy, generally weighing more than 15kg; iron-lithium battery has the advantage of high energy density, weighing only 5kg, and the volume is only One third of lead-acid batteries. (2) Battery life: lead-acid batteries generally have a lifespan of about 2 to 3 years; iron-lithium batteries are more durable, with a lifespan of up to 10 years. (3) Durability and warranty: lead-acid batteries are generally fully charged and discharged for 300 cycles, and the warranty is usually one year; iron-lithium batteries have more than 2,000 full charge and discharge cycles, and BYD iron-lithium batteries are guaranteed for 6 years. (4) Power retention time u0026 battery capacity: Lead-acid batteries can only discharge 40% of the capacity when high current is discharged; iron-lithium batteries can discharge more than 90% of the capacity; at -20℃ low temperature, lead-acid batteries can only discharge 20% %~30% of the capacity, the iron-lithium battery can discharge more than 70% of the capacity; at -20℃, the iron-lithium battery can last for 20 days, and the lead-acid battery may run out in a week. (5) Fuel saving: The charge and discharge efficiency of lead-acid batteries is only 80%, and 20% of the energy is wasted during the charge and discharge process; the charge and discharge efficiency of the iron-lithium battery is over 97%, and only 3% of the energy is wasted during the charge and discharge process. Lithium batteries are more fuel-efficient. (6) Safety: The important components of lead-acid batteries are lead and sulfuric acid. As lead-acid batteries have good sealing properties, they are safe in normal use. However, if an accident such as a liquid leakage occurs, the harm caused by it will be higher than that of an iron-lithium battery. The iron-lithium battery has high thermal stability and structural stability, and is the safest lithium battery. Its safety is equivalent to that of a lead-acid battery, and the addition of an intelligent protection system to the iron-lithium battery makes its safety even further. (7) Cost of use: The current market sales of mainstream lead-acid batteries are about 400 yuan, and start-stop lead-acid batteries cost more than 1,000 yuan, but the warranty for ordinary lead-acid batteries is only one year; the price of lithium iron phosphate and the start-stop lead-acid batteries The price is similar, the start-stop type lead-acid warranty is 2 years, and the BYD lithium iron phosphate warranty is 6 years. At the same price, the lithium iron phosphate battery has a longer warranty, lower cost, and higher cost performance. Through the analysis and comparison of the above seven aspects, it can be found that the iron-lithium battery has obvious advantages. But why has iron-lithium battery not become the mainstream starting battery on the market? There may be three reasons: (1) Lead-acid batteries have been introduced into the automotive industry for more than 90 years. They have matured and deep-rooted. Consumers and automakers have become accustomed to its existence; while iron-lithium battery technology has matured. It only has a few years, and it has not received enough attention. (2) For price reasons, lead-acid batteries are inexpensive and can meet daily needs; while iron-lithium batteries have better performance, but the price is about three times that of ordinary lead-acid batteries. (3) In the process of buying a car, the proportion of the battery in the decision-making process is too small, and it is not an important concern of the manufacturer, so the introduction of new technologies and the ability to respond will be a bit slow. 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: How to test the performance of lithium batteries?