Selling Point Descriptions - Hitachi uc 24yfb Technical Data And Service Manual

4-1. Selling Point Descriptions

4-1-1. Capable of handling both nickel cadmium (Ni-Cd) and nickel metal hydride (Ni-MH) batteries
Through application of HITACHI-microcomputer and electronic-circuit control technology, Model UC 24YFB is
capable of handling both Ni-Cd and Ni-MH batteries.
4-1-2. Rapidly charges Hitachi EB 2420 and 2430 HA batteries
NOTE: The recharging time may vary depending on the ambient temperature and the power supply voltage.
: Ni-MH batteries
4-1-3.Recharging/discharging cycles of battery (ambient temperature range between 10˚C and 30˚C)
Ni-Cd battery: about 1,000 times
Ni-MH battery: about 500 times
4-1-4. Capable of recharging batteries with internal temperatures as high as 60 ˚C
When a battery with S terminal is used, as shown in Fig. 2, the 60 ˚C thermistor operates to permit recharging of
batteries heated up to 60 ˚C, and as shown in Fig. 3, the 55 ˚C thermistor operates heated up to 55 ˚C.
(Note 1) • Wiring diagrams for batteries are shown below.
• The 95 ˚C thermal protector in the batteries EB 2420 and 2430 HA interrupts the recharging circuit
when the battery temperature reaches 95 ˚C.
• A discriminating resistor is provided in Ni-MH batteries EB 2430HA and EB 2430H to distinguish
them from Ni-Cd batteries.
• Because Ni-MH battery EB 2430HA is heated to high temperatures during recharging, this charger
operates within a range of a 10 ˚C temperature difference between the maximum battery
temperature when starting recharging (45 ˚C) and the temperature when stopping recharging (55 ˚C).
Table 1 Recharging time (approx. min.) at 20 ˚C
Battery capacity
Battery
voltage
2.0 Ah
24 V 50 min.
EB2420
3
3.0 Ah
70 min.
EB2430HA