Page 115 - Battery Reference Book

Recombining sealed lead-acid batteries 3/6
Hawker Energy Ltd Cyclon range of sound electrode Table 3.1 Characteristics of standard cells
combination batteries and the Hawker Energy Inc.
range discussed above are equivalent and hence the D X BC
Chloride product, available in the UK, will not be Nominal voltage (v)
discussed in great detail here. 2.0 2.0 2.0
These batteries are contined in a polypropylene case Capacity rating (Ah)
with a metal outer canister and are available as single 10 h rate 2.5 5.0 25
cells and in battery packs including a lantern battery. (250mA) (500mA) (2.5 A)
Batteries will be specially designed and produced to 1 h rate 2.8 3.2 20
(5A)
(2.5A)
meet customers' requirements. Peak power rating (W) 135 200 (25 AI
600
The standard types of cell now available are the D, (at 135 A) (at 200A) (at 600A)
X and BC cells (Table 3.1). Internal resistance
Temperature ranges are -65 to +65T (storage and 10 6
discharge) and -40 to +65"C (charge). Storage lives (x10-3~) 2.2
from full charge are 18 years at o"C, 3 years at 25°C Diameter (mm) 34.2 44.4 65.7
and 1 year at WC. The expected cycle life varies from Height (mm) 67.6 80.6 176.5
300 to 2000 cycles and the float life is 8-10 years. Weight (kg) 0.181 0.369 1.67
Charging is by most conventional methods including
constant voltage, constant current, taper charging,
pulse charging, etc., according to the application. Batteries (6 and 12V) are available with capacities
Self-discharge is typically 6-8% per month at room in the range 2.7-52A (20h rate), 2.5-50A (10h rate).
temperature. The characteristics (including discharge characteris-
The manufacturers claig that the D cell will give tics, battery life, safety, storage and battery testing) of
instantaneous discharges of up to 100 A and sustained sealed lead-acid batteries have been discussed further
discharges of up to 30A. Double these figures can be in a book published by Gates Energy Products (see
obtained with the X cell, and up to 800A with the Bibliography).
BC cell.