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Revision 1.04
KiloVault
®
LLC • 330 Codman Hill Road, Boxborough, MA 01719 • +1 (888) 218-5924 •
4.2.4.
Recharging
Generally speaking, lead sulfate will be produced on the battery negative plate when they are
stored for a long time. KiloVault® 2100 PLC batteries can be stored for up to 24 months. Because
lead sulfate is an electrical insulator, it negatively affects the performance of the battery. We
recommend the following recharge schedule based on storage temperatures.
If a battery is stored under 68°F (20°C), it should be recharged every 9 months, at a constant
13.38V to 13.62V, current limit 0.25C
10
for 2 to 3 days.
If it is stored between 68°F and 86°F (20°C to 30°C), it should be recharged every 6 months at
13.8V to 14.4V, current limit 0.25C
10
for 10 to 16 hours.
If it is stored between 86°F and 104°F (30°C to 40°C), it should be recharged every 3 months at
13.8V to 14.4V (temperature compensated -3mV/°C), current limit 0.1C
10
for 8 hours or 0.05 C
10
for 16 hours.
4.2.5.
Open-Circuit Voltage (OCV) vs. State of Charge (SoC)
The open-circuit voltage of lead acid batteries varies with the specific gravity of the electrolyte.
While discharging, the specific gravity of the electrolyte changes greatly but cannot be
measured in a closed battery, so the open-circuit voltage is measured and the approximate
residual capacity is calculated.
Figure 9: OCV/Cell vs. SoC
