Page 342 - Battery Reference Book

Effect of operating temperature on service life 30/13

120 r 100

2,

0 bJ I I I I I I I I , , , , , , , ,,
-45 -23 -11 21 43 65 0
-50-40-30-20-10 0 10 20 30 40 50 MI 70 80
Discharge temperature ("C)
Temperature (" C!
Figure 30.33 Honeywell lithium-sulphur dioxide cell: discharge Figure 30.35 Effect of battery temperature on available capacity
as a function of load and temperature. 1, one-seventh rated load;
2, rated load; 3, seven times rated load (Courtesy of Honeywell) of a lithium-thionyl chloride cell (Courtesy of Mallory)
140 r
10 000

1000
I
Q
-.
E
c
C
E
I
CI
1W
2
-40 -29 -18 -7 4 15 27 38 49 66
1C I / I / I l i Temperature ("C)
-20 0 20 40 60
Temperature ("C) Figure 30.36 Union Carbide, Eveready E91 alkaline manganese
1.5Vdrycell: effect of temperatureon service lifeat 21"C, 24 h/day
Figure 30.34 Mallory hermetic D-size lithium-sulphur dioxide discharge, 1 .OV cut-off. 1, starting drain 200 mA, load 7.5 Q; 2,
cell: current and temperature limitsforvarlous capacity realizations starting drain 20 mA, load 75 Q (Courtesy of Union Carbide)
(Courtesy of Mallory)
Table 30.1 High-rate discharge performance of Mallory
The estimated current and temperature limits for the lithium-sulphur dioxide hermetic D-size cell: test performed on
hermetic D-size cell for 80, 90 and 100% capacity resistive loads after 6 months' storage at 20°C
realization are shown in Figure 30.34. It is interesting
that the high-rate properties have been optimized to Nominal Capacity (Ah)
the 20-30°C temperature range without great sacrifice discharge ab various discharge temperatures
at other temperatures. current
(mA) -23°C 0°C 24°C 49°C 60°C
Lithium-thionyl chloride primary batteries ~ ~
1000 3.7 5.8 9.1 6.9 6.8
Figure 30.35 shows the effect of battery temperatures 250 7.1 8.3 10.0 8.2 8.8
on available capacity for a lithium-thionyl chloride 50 9.7 9.7 10.1 8.9 9.5
cell. 10 10.1 10.3 10.2 10.5 10.5
Alkaline manganese dioxide primary batteries
Figure 30.36 shows a curve obtained for a 1.5V temperatures from 21°C to -2/+4"C approximately
dry cell. It can be seen that a reduction in battery halves the service life attainable.