电动车锂电池寿命

用多久:电动车锂电池能用几年?相信绝大部分消费者都听说过，锂电池的寿命是“500次”，500次充放电，超过这个次数，电池就“寿终正寝”了，许多朋友为了能够延长电池的寿命，每次都在电池电量完全耗尽时才进行充电，这样对电池的寿命真的有延长作用吗?答案是否定的。锂电池的寿命是“500次”，指的不是充电的次数，而是一个充放电的周期

一个充电周期意味着电池的所有电量由满用到空，再由空充到满的过程，这并不等同干充一次电。比如说，一块锂电在第一天只用了一半的电量，然后又为它充电慢电。如果第二天还如此，即用一半就充，总共两次充电下来，这只能算作一个充电周期，而不是两个。因此，通常可能要经过好几次充电才完成一个周期。每完成一个充电周期，电池容量就会减少一点。

不过，这个电量较少幅度非常小，高品质的电池充过多次周期后，仍然会保留原始容量的80%，很多锂电供电产品在经过两三年后仍然照常使用。当然，锂电寿命到了最终后仍是需要更换的。而所谓500次，是指厂商在恒定的放电深度实现了625次左右的可充次数，达到了500个充电周期。由于实际生活的各种影响，特别是充电时的放电深度不是恒定的，所以“500个充电周期”只能作为参考电池寿命。

误区:我们经常有“锂电池电量用尽后再充电”或者是“锂电池充满后继续冲，一定要充够12小时”的误区。殊不知，如果您如此的使锂电池过度充电或过度放电，非但不能使电动车锂电池寿命延长，反而会缩短。那么如何正确使用锂电池呢?

Electric vehicle lithium battery life

How long does it last: How many years can a lithium battery for an electric vehicle be used? I believe that most consumers have heard that the life of a lithium battery is "500 times", and 500 times of charge and discharge. After this number of times, the battery will "end of life". In order to prolong the life of the battery, many friends charge when the battery is completely exhausted. Does this really prolong the life of the battery? The answer is no. The life of a lithium battery is "500 times", which refers not to the number of times of charging, but a cycle of charging and discharging

A charging cycle means that all the power of the battery is from full to empty, and then from empty to full, which is not equivalent to a dry charge. For example, a lithium battery is only half full on the first day, and then recharges it slowly. If it's still the same the next day, that's half of the charge, for a total of two charges, which counts as one charge cycle, not two. Therefore, it may usually take several charges to complete a cycle. Each time a charge cycle is completed, the battery capacity decreases a little.

However, this power reduction is very small. After a high-quality battery has been charged for many cycles, it will still retain 80% of its original capacity. Many lithium-ion battery-powered products are still used as usual after two or three years. Of course, the lithium battery still needs to be replaced after the end of its life. The so-called 500 times means that the manufacturer has achieved about 625 rechargeable times at a constant depth of discharge, reaching 500 charging cycles. Due to various effects of real life, especially the depth of discharge during charging is not constant, "500 charging cycles" can only be used as a reference battery life.

Misunderstanding: We often have the misunderstanding of "recharge after the lithium battery is exhausted" or "continue to charge after the lithium battery is fully charged, it must be charged for 12 hours". However, if you overcharge or overdischarge the lithium battery in this way, instead of prolonging the life of the lithium battery for electric vehicles, it will shorten it. So how to use lithium batteries correctly?