Page 597 - Battery Reference Book

51/34 Nickel batteries

cells is also available. These cells are housed in stain- Table 51.34 GEC charging equipment
less steel, magnesium and aluminium containers and
are equipped with a Safety Pippet valve. Energy dens- Model Cell Capacity Maximum GEC
ities are 26-36Whkg as cells and 19.5-33 Whkg as No. size (Ah) charge charger
batteries. Operating temperature is in the range -18 1 h rate rate (mA) model
to 52T, and storage temperature in the range -18 to GCI AA 0.5 50 BC-1
32°C. A minimum shelf life of 5 years is claimed, and GC2 C 1 .o 100 BC-1, BC-48B
a cycle life of 5000. Self-discharge rates per day at GC3 D 1.2 100 BC-1, BC-48
various temperatures are given in Table 51.41. A typi- GC4 D 3.5 350 BC-448
cal cell discharge curve is shown in Figure 51.25. The
effect of temperature on cell discharge characteristics
is shown in Figure 51.26. Ever Ready (Berec) (UK)
These cells have been used in applications such as
orbiting spacecraft, undersea power, environmental test This company supplies a range of sintered plate cylin-
sheds and sealed ground power units. drical cells and mass plate button cells (Tables 51.42

Table 51.35 Rechargeable Carefree II sealed nickel-cadmium button cells, ZA series, supplied by Eagle Picher

ZA30 ZA35 ZA60 a110 ZA180 ZA200 ZA280 ZA600
Nominal voltage (V) 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2
Nominal rating (at 5 h rate) (mA h) 30 35 60 110 180 200 280 600
when discharging down to 1.OV at (mA) 6 7 12 22 36 40 56 120
Rating typical = 100% (mA h) 33 40 75 120 190 220 310 650
Discharge rate, max. (mA) 30 50 75 165 250 100 280 300
Surge power (max. 2 s) (A) 0.3 0.5 0.7 1.5 2 1 2 3
Ri (charged, f = 50 cycles), approx. (ma) 700 350 300 170 120 170 120 70
Charge rate, max. (mA) 3 .O 3.5 6 11 18 20 28 60
Charge time (recommended) (h) 14-16 14-16 14-16 14-16 14-16 14-16 14-16 14-16
Charge voltage (V) 1.3-1.5 1.3-1.5 1.3-1.5 1.3-1.5 1.3-1.5 1.3-1.5 1.3-1.5 1.3-1.5
Current for trickle charge, max. (mA) 0.3 0.35 0.6 1.1 1.8 2.0 2.8 6.0
Cell diameter, d, approx. (mm) 11.Y9.5 15.5 15.5 22 25 22 25 35
Cell height, h, approx. (mm) 5.4 4 6 4.5 6 7.6 9 10
Cell weight, approx. (g) 2.0 2.50 4 6 9 10 13.5 30
Battery diameter, D, approx. (mm) 12 16 16 23 26 23 26 36
Up to 10 cells may be connected in series to form a battery

Table 51.36 Rechargeable Carefree II sealed nickel-cadmium button cells, Z2A series, supplied by Eagle Picher
Z2A 35 Z2A 110 Z2A 180 Z2A 250 Z2A 300

Nominal voltage (V) 2.4 2.4 2.4 2.4 2.4
Nominal rating (at 5 h rate) (mA h) 35 110 180 250 300
when discharging down to 2.0V at (mA) 7 22 36 50 60
Rating typical = 100% (mAh) 40 120 190 280 350
Discharge rate, max. (mA) 40 165 250 250 600
Surge power (max. 2 s) (A) 0.5 1.5 2 2 4
Ri (charged, f = 50 cycles), approx. (m Q) 700 340 240 240 130
Charge rate, max. (mA) 3.5 11 18 25 30
Charge time (recommended) (h) 14-16 14-16 14-16 14-16 14- 16
Charge voltage (V) 2.6-3.0 2.6-3.0 2.6-3.0 2.6-3.0 2.6-3.0
Current for trickle charge, max. (mA) 0.35 1.1 1.8 2.5 3.0
Cell diameter, d, approx. (mm) 15.5 22 25 25 35
Cell height, h, approx. (mm) 6.5 7.5 IO 13.5 10
Cell weight, approx. (g) 4 10 14 22 32
Battery diameter, D, approx. (mm) 16 23 26 26 36
~
Up to 10 cells may be connected in series to form a battery