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4. FLOAT
Keeps the battery at constant voltage and fully charged.
5. STORAGE
Keeps the battery at reduced constant voltage to limit gassing and corrosion of the positive plates.
6. READY (battery fully charged)
The battery is fully charged when the FLOAT or STORAGE LED is on.
7. REFRESH
Slow self discharge is prevented by an automatic weekly refresh of the battery with a short absorption
charge.
3.2 Lithium-ion (LiFePO
₄
) batteries
When charging a Lithium-ion battery, the
Blue Power Charger
uses a specific charging algorithm for Lithium-
ion batteries, to ensure optimum performance.
Select LI-ION with the mode button.
3.3 When a load is connected to the battery
A load can be applied to the battery while charging. Please note that the battery will not be charged if the current
to the load is higher than the output current of the charger.
Reconditioning is not possible when a load is connected to the battery.
3.4 Triggering a new charge cycle
A new charge cycle will start when:
a)
The charger has reached float or storage, and, due to a load, current increases up to maximum current
during more than four seconds.
b)
The MODE button is pressed during charging.
c)
The AC supply has been disconnected and reconnected.
3.5 Estimating charge time
A lead-acid battery is about 80% charged at the beginning of the absorption period.
The time
T
to 80% charged can be calculated as follows:
T = Ah / I
Where:
I
is the charge current (= charger output minus load current).
Ah
is the amount of Ah to be charged.
A full absorption period of up to 8 hours is needed to charge the battery to 100%.
Example:
Charge time to 80% of a fully discharged 220Ah battery when charged with a 30A Charger: T = 220 / 30 = 7,3
hours. Charge time to 100%: 7,3 + 8 = 15,3 hours.
A Li-ion battery is more than 95% charged at the beginning of the absorption period, and reaches 100% charge
after approximately 30 minutes absorption charge.
3.6 High internal resistance
When a battery reaches the end of its cycle- or float life, or when it dies prematurely due to sulfation or corrosion,
capacity will dramatically drop and internal resistance will increase. The charger will not reject such a battery
during the test phase (it could as well be a nearly fully charged battery).
A very short bulk phase when charging a supposedly discharged battery does however indicate that the battery
has reached the end of its useful life.
Remark: sulfation can sometimes be partially reversed by repeated application of the RECONDITION MODE.
3.7 Can be used as a power supply
The charger will supply DC loads when no battery is connected.
