Page 328 - Lindens Handbook of Batteries

13.34 PrImArY BATTErIES

15

10
Battery weight change, mg 5

0

–5

Design A Design B Design C
–10

–15
20% 30% 40% 50% 60% 70% 80%
Relative humidity at 20°C
FiGURE 13.33 Change in battery weight of three different manufactures of Pr41 (312) zinc/air batteries after
7 days open stand at 20, 50, and 80% relative humidities.

1500 ohm 12 h/day
95% confidence interval for the mean

110%

Relative capacity 100% 100%

90%

80%
Test humidity 20% 50% 20% 50% 20% 50%
design A B C
FiGURE 13.34 The initial 20% relative humidity capacity performance as a percentage of each design’s
50% relative humidity result on the 1500 ohm, 12 h/day test at 20°C.

the three designs on this test in 20, 50, and 80% relative humidity. To normalize the different capaci-
ties of the designs, the results of each capacity test are plotted in Fig. 13.36 as a percentage of each
design’s average 620 ohm, 16 h/day result at 50% relative humidity.
For the short duration moderate 620 ohm test, none of the designs experienced a significant loss
of performance in high- and low-humidity conditions. However, when the typical test time frame