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Absorption: To fully charge a battery a period of charging at a relatively high voltage
is needed. This period of the charging process is called absorption. This occurs when
the charging of a battery has reached reached 80% of its capacity. The remaining
charge equals 20% approximately. It makes the charger to hold the voltage at the
charger’s absorption voltage (between 14.1 VDC and 14.8 VDC, depending on charger
set points) and decreasing the current until the battery is fully charged.
Float: The charging voltage is reduced to between 13.0 VDC and 13.8 VDC and held
constant, while the current is reduced to less than 1% of battery capacity. This mode
can be used to maintain a fully charged battery indefinitely.
Equalisation: This is essentially a controlled overcharge that occurs at the end of the
Bulk mode and the absorption phase and is called the ‘equalisation voltage’. However,
this technically this phase has another function. Higher capacity wet (flooded) batteries
sometimes benefit from this procedure, particularly the physically tall batteries. The
electrolyte in a wet battery can stratify over time, if not cycled occasionally. In
equalisation, the voltage is brought up above typical peak charging voltage well into
the gassing stage and maintained for a fixed (but limited) period. This stirs up the
chemistry in the entire battery, ‘equalising’ the strength of the electrolyte, and knocking
off any loose sulphating that may be on the battery plates.
5.13. Setting Up a Lithium Battery
To set up a lithium-ion battery, click on the BATTERY icon and visit the ‘Batt Type’
column.
After installing a lithium battery, check on the communications page by clicking on the
‘Li BMS’ icon to see if the BMS information is visible. If some information is not
displayed correctly (it should look like the diagrams below) then there will be a
communication error.
What this page displays:
This information will only display if the
‘Lithium’ option is selected under ‘Batt
Type’.
The type of communion protocol.
Approved batteries.
What you can do from this page:
Set up your lithium battery.
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