24
100%SOC
Bulk
Absorption
Float
U1 Max
Absorption & Balancing
CURRENT
VOL
TAGE
U2 Float
Bulk Vdc
I Max
I Min
Terminate at 2%-3% of
battery rated capacity
200 milliamps required for
balancing current
Figure 9. Charge Graph.
NOTICE
• Charge with a Lithium charge profile matching the specifications for the AES LiFePO
4
battery.
• Do not charge using a lead-acid charging profile. Charging using a lead-acid profile
will void the warranty.
NOTE
• Charging at 50% of nominal current or lower will extend the battery cycle life.
10.4.1 Bulk Charge
Bulk phase.
The Bulk Charge is the first phase of the charging process, also called
the constant current phase. This phase is when the charger’s maximum current
is directed to the battery until reaching the desired voltage. The Bulk phase will
recharge the battery to approximately 90-95% SOC.
If the charging source is a generator or other charge source that is not efficient at
low output current, a single-stage charge may be appropriate. A single-stage charge
will only complete the Bulk phase portion of the charge curve. This method should
return the battery to 90-95% SOC.
Refer to
Table 3-1, AES LiFePO
4
Electrical Specifications
for charging parameters.
10.4.2 Absorption Charge
Absorption phase.
The second phase of the charging process is Absorption Charge,
also called the constant voltage phase. In this phase, the charger reduces current
accordingly to maintain the desired voltage.
Refer to
Table 3-1, AES LiFePO
4
Electrical Specifications
for charging parameters.
Summary of Contents for Discover 42-48-6650
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