Relion Lithium Charging Instructions

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Charging Instructions 06.13.18
CHARGING INSTRUCTIONS
Charging Series or Parallel Systems
When connecting batteries in series or parallel, please make sure each battery is within 50mV (0.05V) of each other before
putting them in service. This will minimize the chance of imbalance between batteries. If your batteries get out of balance, the
voltage of any battery is >50mV (0.05V) from another battery in the set, you should charge each battery individually to rebalance.
You can charge each battery individually periodically to avoid imbalance. When charging LiFePO batteries in series, it is best to
use a multi-bank charger that charges each battery individually to ensure the cells remain balanced.
If you charge batteries in series or parallel with one single bank charger (1 set of charge leads) for the entire system, please follow
the instructions below.
CC Charge Profile – 1 Stage
1-STEP CHARGE
DESCRIPTION
STEPS DESCRIPTION CHARGE PARAMETERS
Step 1 - Charge
at a constant
current until
the battery
reaches
termination
voltage.
1
*Recommended
Charge Current
≤0.5C
**Maximum
Charge Current
1C or 100A (the lower of the two values)
SYSTEM VOLTAGE 12V 24V 36V 48V
Stop
Termination
Voltage
14V 28V 42V 56V
* Charge current must be reduced at temperatures <0C (32F). See details in Charge Temperature section.
** For optimum life, charge at recommended rate. Some models are specially designed to allow for higher current.
If your charger’s voltage is lower than those listed in the tables above, it will not damage your battery, however it will be under-
charged, and it will not provide the full rated capacity of the battery. If your charger’s voltages are higher than those listed in the
tables above, the BMS will disconnect the battery circuit and you will have to remove the load to reconnect. We recommend you
replace the charger to avoid this inconvenience.
Fuel Gauges
If you are using a voltage-based fuel gauge that is designed for lead-acid batteries it will not accurately provide state of charge
(SOC). Please replace your fuel gauge with one that measures current rather than voltage.