Use and Care Manual

LEOCH Battery Corporation
6.4 Charge
6.4.1 Float Charge Parameters:
 Charge voltage: 2.23 ~2.30V/cell at 77°F (25°C)
 The maximum charge current: 0.30C10
 Temperature compensation coefficient: -3mV/cell (taking 77°F (25°C) as base point)
 Total variation range of charge voltage is ±0.02V/cell
Note:
1) All cell/bloc voltages of a battery group have a little difference at the beginning of use,
half year later they become matched.
2)
Effect from too high float voltage or too low float voltage as
below: Too high for a long time (overcharge): life shortened
Too low for a long time (not charge enough): Cannot meet load and/or make battery
voltages inconsistent. The battery group capacity will drop accordingly and life is shortened.
6.4.2 Cycle Usage Charge Parameters:
 Charge voltage: 2.40 ~2.50V/cell at 77°F (25°C)
 The maximum charge current: 0.30C10
 Temperature compensation coefficient: -5mV/cell (taking 77°F (25°C) as base point)
 Total variation range of charge voltage: ±0.02V/cell
 Charge capacity is 110% ~ 130% of discharge capacity.
6.4.3 Equalization Charge Parameters:

Charging voltage
:
2.35 ~ 2.40V/cell (25°C)
 Maximal charging current
:
0.30C
10
 Temperature equalization parameter
:
-3mV/cell(25°C)
 Variation scope of charging voltage
: ±0.02V/cell
Note:
Do not use equalization charging as the standard floating application. Adopt equalization charging
under situations below:
1. Discharging capacity is below 80% of rated capacity.
2. Batteries hasn’t been used for more than 3 months.
3. Float voltage of battery unit is less than 2.18V/cell
4.
Batteries have been floating for 3 ~ 6 months and found low voltage batteries in the string.
5. Batteries have been floating for a year.
6.
Batteries supplementary charged before used.
7. After performing a capacity test.