Page 603 - Battery Reference Book

51/40 Nickel batteries

0 20 40 60 80 100 120 0 10 20 30 40 50 60 70 80 90 100
(a) Capacity (%I Capacity (%)
Figure 51.28 Temperature characteristic comparison of Yuasa
RS and NR-H sealed nickel-cadmium cells at 45 f 2°C: charging
at 1/3OC mA for 48 h, discharge at IC rnA (Courtesy of Yuasa)
-

1.6 -
RSF cell 1/3C mA X 4.5 h

1 0 20 40 60 80 . 100 120 140 160 3 ~
1.3 t
Charging quantity (%)
(b)

f,,,,,,,,
0 20 40 60 80 100 120 140 160
Charging quantity (%)
Figure 51.29 Standard charging voltage characteristics of a
Yuasa RSF sealed nickel-cadmium battery at 20-25°C (Courtesy
of Yuasa)

2 4 6 8 10 12 15
Charging time (h) 51.1.2 Unsealed (low-maintenance)
(C)
nickel-cadmium batteries
Figure 51.27 Standard discharge and charging characteristics for
Yuasa F type sealed nickel-cadmium button cells. (a) Discharge Vavta
afterchargeat O.lCmAforl5 h, chargeanddischargeat20-25°C.
(b,c) Charging at 0.1 C mA for 15 h (Courtesy of Yuasa)
Varta supply a non-sealed double cell (DTN) for
portable lamps. This battery is available in a capacity
shown in Figure 51.29. The basic data on Yuasa button range 4.5- 11 Ah (Table 5 1.46). It has a light weight,
and cylindrical cells are presented in Table 5 1.4 1, with even voltage level, good capacity, long service life,
button stack assemblies in Table 51.42. lack of maintenance and low self-discharge rate.

Table 51.46 Varta DTN range of low-maintenance nickel-cadmium batteries

Battery Type Nominal Nominal Medium Nominal Charging Filled Quantity of
type No. 333 capacity discharge discharge charging voltage weight electrolyte
in 5 h (Ah) current voltage current (V) (kg) (h3)
in 5 h (A) (VI in 7h (A)
DTN4.5K 2452010 4.5 0.9 2.4 0.9 0.42 0.08
DTN6.5K 2652 010 6.5 1.3 2.4 1.3 Increasing 0.61 0.11
DTN7K 2702010 7.0 1.4 2.4 1.4 from 2.7 0.75 0.14
DTN12K 3122020 11.0 2.2 2.4 2.2 to 3.6 0.90 0.20