-Is it better to charge lithium iron phosphate batteries to 100% or 95%?

Is it better to charge lithium iron phosphate batteries to 100% or 95%?
author:enerbyte source:本站 click102 Release date: 2024-10-18 08:41:52
abstract:
Charging lithium iron phosphate batteries to 100% is better than charging to 90%, and the battery should be fully charged at least once a week. It is different from ternary lithium batteries. For ternary lithium batteries, it is sufficient to charge to 90% each time because this is the optimal value...

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Charging lithium iron phosphate batteries to 100% is better than charging to 90%, and the battery should be fully charged at least once a week. It is different from ternary lithium batteries. For ternary lithium batteries, it is sufficient to charge to 90% each time because this is the optimal value set by the manufacturer.


As for why it is recommended to fully charge lithium iron phosphate batteries, we have to mention its battery pack. When lithium iron phosphate batteries are charging, especially during fast charging, the bms system that distributes power to each battery pack may not work in a timely manner.


So the power distributed to each battery pack is different, which will lead to imbalance among the batteries. The battery pack that has been fully charged will mislead the entire battery pack, making it think that the battery is fully charged, but in fact it is not.


The slow charging time at the later stage of the battery gives the system enough time to restore the balance of the battery. Therefore, for lithium iron phosphate batteries, it is best to fully charge each time.


But it should be noted that there is a difference between "full charge and full discharge" and "overcharge and overdischarge". First of all, lithium iron phosphate batteries are indeed recommended to be "fully charged and fully discharged", but this is based on the shallow charge and shallow discharge of ternary lithium batteries.
That is to say, lithium iron phosphate batteries can be charged when the vehicle prompts that the battery power is too low. If charging is still not performed when the battery power is too low, and instead waiting until the battery is completely dead before charging, that is overdischarge, which will damage the battery at this time.


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