Page 351 - Battery Reference Book

30122 Primary batteries

71 r

-18 u
-18 1111
44 88 132 44 88 132
Energy density (W h/dm3) Energy density (W h/dm3)
(a) 0.16 A drain equivalent to 0.12 W/in3, (bl 0.4 A drain equivalent to 0.30 W/in3,
4.6 W hlkg, 7.3 W h/dm3 at 24 OC 11.9 W h/kg, 18.3 W h/dm3 at 24 OC

711-

j:v , ,

f
e
$ 4
-18 1- -18
61 122 183 61 122 183
Energy density (W h/dm3) Energy density (W h/dm3)
(c) 0.8 A drain equivalent to 0.56 W/in3, (d) 1.6 A drain equivalent to 1.04 W/in3,
22.2 W h/kg, 34 W h/dm3 at 24 "C 41 W h/kg, 63 W h/dm3 at 24 "C
Figure 30.57 Effect of current density and temperature on the continuous discharge of a Marathon CD-size magnesium cell (Courtesy of
Marathon)

Another useful method of presenting the overall magnesium cell for discharge rates between 0.16 and
temperature performance of batteries is a plot showing 1.6 A at a temperature of 24°C. The highest watt hour
the energy dependence of W h/dm3 on temperature output (about 190 W h/dm3) is obtained at the lowest
at different continuous discharge rates. Figure 30.57 discharge current and the highest temperature (0.16 A
shows such curves for the Marathon CD-size and 71°C).