question

robert-larsson avatar image

Adaptive Charge curve and absorbtion time for Litium Batterys

Hei

I am using a Multi plus 24/3000/70-50 for 24 Volt/300 Ah Lithium Battery bank (Drop in Batterys,LITHIUM IRON PHOSPHATE)

I am uncertain about my charger configuration, especially Adabitve Charge curve and absorbtion time .

Charge current 52 A

Absorbtion Voltage 28,4 V (given by Battery producer)

Floate Voltage 27 Volt (given by Battery producer)

Repeated absorbtion time 1 Hour

Max Absorbtion time 1 Hour

Charge curve: Adaptive

Battery Safe: ON.

Lithium batterys: ON

.Are this OK ?

Is a Adabitve Charge curve suitable for Litium Batterys.

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Lithium Battery
1616660295473.png (146.7 KiB)
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1 Answer
Alexandra avatar image
Alexandra answered ·

@Robert Larsson

Most lithium batteries used the fixed charge for theirs. That being said they usually have comms with the GX device.

https://www.google.com/url?q=https://www.victronenergy.com/upload/documents/Adaptive_charging_how_it_works.pdf&sa=U&ved=2ahUKEwizkuTKksvvAhXyoFwKHSBZBkQQFjAAegQICRAB&usg=AOvVaw205HfI0jjoJqSqoJcZpBTR

A bit of reading if you would like to know more. It is mainly designed for lead based batteries, as absorption on a lithium is used for top balancing the cells it is not really reversing the cell chemistry anymore.

Top balancing is important in passively balanced batteries though. Your one hour even once a day is enough for most batteries.

You have followed recommend voltages from that point you should be ok. Having adaptive and battery safe that changes the charge algorithm completely though.

You may find they don't balance out as the absorption phase can be cut short. If you click on the charge curve description it does explain the differences.

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