Electric vehicle lithium battery life

Electric vehicle lithium battery life
How long: How many years can the lithium battery of an electric vehicle be used? I believe most consumers have heard that the lifespan of a lithium battery is "500 times", 500 times of charge and discharge. In order to prolong the life of the battery, my friend charges the battery only when the battery is completely exhausted. Does this really prolong the life of the battery?
the answer is negative. The life of a lithium battery is "500 times", which does not refer to the number of charges, but a cycle of charge and discharge.
A charging cycle means that all the power of the battery is used from full to empty, and then from empty to full, which is not the same as charging once. For example, a lithium battery only uses half of its power on the first day, and then recharges it slowly. If it is still the same the next day, then charge half of it, and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several charges to complete a cycle. Every time a charging cycle is completed, the battery capacity will decrease a little.
However, the power reduction is very small. High-quality batteries will still retain 80% of their original capacity after being charged for many cycles.
Years later it is still used as usual. Of course, lithium batteries still need to be replaced after the end of their life. The so-called 500 times means that the manufacturer has achieved about 625 times at a constant discharge depth.
Rechargeable times, up to 500 charging cycles. Due to various influences in real life, especially the depth of discharge during charging is not constant, so "500 charging cycles" can only be used as
For reference battery life.
Misunderstanding: We often have the misunderstanding of "recharge the lithium battery after it is exhausted" or "continue charging after the lithium battery is full, and must charge it for 12 hours". As everyone knows, if you overcharge or over-discharge the lithium battery in this way, instead of prolonging the life of the lithium battery of the electric vehicle, it will shorten it.