-Is it better to fully charge a lithium iron phosphate battery to 100% or to 95%?

Is it better to fully charge a lithium iron phosphate battery to 100% or to 95%?
author:enerbyte source:本站 click24 Release date: 2024-10-30 08:49:17
abstract:
Fully charging a lithium iron phosphate battery to 100% is better than charging it to 90%, and it is advisable to fully charge the battery at least once a week. There are some differences between it and ternary lithium batteries. For ternary lithium batteries, it is sufficient to charge them to 90%...

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Fully charging a lithium iron phosphate battery to 100% is better than charging it to 90%, and it is advisable to fully charge the battery at least once a week. There are some differences between it and ternary lithium batteries. For ternary lithium batteries, it is sufficient to charge them to 90% each time, as 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 their battery packs. When lithium iron phosphate batteries are being charged, especially during fast charging, the BMS system that distributes electricity among the various battery packs may not work promptly enough.


Consequently, the amount of electricity distributed to each battery pack will be different, leading to an imbalance among the batteries. The already fully charged battery packs will give the entire battery pack the wrong impression that it is fully charged, when in fact it isn't.


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


However, it is worth noting that there is a difference between "fully charging and discharging" and "overcharging and over-discharging". First of all, it is indeed recommended to "fully charge and discharge" lithium iron phosphate batteries, but this is in contrast to the "shallow charging and discharging" of ternary lithium batteries.


In other words, lithium iron phosphate batteries can be charged when the vehicle indicates that the battery power is too low. If you still don't charge the battery when it indicates low power but wait until the battery is completely dead before charging, that is over-discharging, and it will cause damage to the battery at this time.


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