Hitachi UC 24YJ, Technical Data And Service Manual

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Relationship between temperature of battery/charger and charging current
Temperature
Battery temperature at the start of
charging is between -5˚C and 55˚C.
Battery temperature at the start of charging
is -5˚C or less.
Inside of the charger becomes hot during
charging at 9 A (see Fig. 13).
Charging current
Switch from 7.5 A to 5 A.
7.5 A
1.3 A (*)
Purpose
Protection of the charger
Protection of the battery
(*) The battery is also charged at 1.3 A when the battery is near the end of its service life.
Otherwise, the battery temperature becomes high due to the high internal resistance and it is
dangerous.
(3) 24 V Ni-Cd batteries
The charging current is switched (6 A/1.3 A) according to the battery temperature at the start of charging.
Charging time
Charging current (constant value)
(Min.)
Charging time
Battery temperature at the start of charging
Charging current (constant value)
In the case of 2.0 Ah Ni-Cd battery Model EB 24B
Temperature
Battery temperature at the start of
charging is between -5˚C and 55˚C.
Battery temperature at the start of charging
is -5˚C or less.
Charging current
6 A
1.3 A (*)
Purpose
Protection of the battery
Fig. 9 Relationship between battery temperature at the start of charging,
charging time and current
Relationship between temperature of battery/charger and charging current
(*) The battery is also charged at 1.3 A when the battery is near the end of its service life.
Otherwise, the battery temperature becomes high due to the high internal resistance and it
is dangerous.