Analysis on the life issues of lithium batteries for electric vehicles

How many years can lithium batteries for electric vehicles be used? I believe that most consumers have heard that the life of a lithium battery is 500 times, 500 times of charging and discharging, beyond this number, the battery will die, many friends in order to extend the battery life, every time the battery is completely consumed Charge it when it is exhausted. Does this really extend the life of the battery? The answer is not fixed. The life of a lithium battery is 500 times, which does not refer to the number of times of charging, but a cycle of charging and discharging. A charging cycle means the process of using all the power of the battery from full to empty, and then from empty to full. This is not the same as charging once. For example, a lithium battery used only half of its power on the first day, and then it was fully charged. If it is still the case the next day, that is, use half of the charge, and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several times to complete a cycle. Every time a charging cycle is completed, the battery capacity will decrease a bit. However, this amount of power is very small. A high-quality battery will still retain 80% of its original capacity after being charged for many cycles. Many lithium-powered products will still be used as usual after two or three years. Of course, the lithium battery needs to be replaced after the end of its life. The so-called 500 times means that the manufacturer has achieved about 625 charging times at a constant depth of discharge, reaching 500 charging cycles. Due to various influences in real life, especially the depth of discharge during charging is not constant, 500 charging cycles can only be used as a reference battery life. Overflowing once a day, once used up, counts as a cycle; overflowing half, use half, count as half a cycle. Therefore, according to the correct use of the battery, the life of the lithium battery is conservative, and the life of the lithium battery is at least three years or more. We often have the misunderstanding that the lithium battery is recharged after it is exhausted or the lithium battery is continuously charged after overflowing, and it must be charged for 12 hours. As everyone knows, if you overcharge or overdischarge the lithium battery in this way, not only will the life of the lithium battery of electric vehicles not be extended, but it will be shortened. 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 article: How to control the safety of energy storage lithium battery manufacturers?