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100%SOC
Bulk Vdc
CURRENT
I Max
I Min
• Charge with a Lithium charge profile matching the specifications for the AES LiFePO
battery.
• Do not charge using a lead-acid charging profile. Charging using a lead-acid profile
will void the warranty.
• 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
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
Bulk
Terminate at 2%-3% of
battery rated capacity
Figure 9. Charge Graph.
NOTICE
NOTE
Electrical Specifications for charging parameters.
4
Electrical Specifications for charging parameters.
4
Absorption
U1 Max
Absorption & Balancing
200 milliamps required for
balancing current
24
Float
U2 Float
4
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