Page 329 - Lindens Handbook of Batteries

BUTTOn CELL BATTErIES: SILVEr OxIDE–ZInC AnD ZInC-AIr SYSTEmS 13.35

620 ohm 16 h/day
95% confidence interval for the mean
110%

Relative capacity 100% 100%

90%

80%
Test humidity 20% 50% 80% 20% 50% 80% 20% 50% 80%
design A B C
FiGURE 13.35 The initial 20 and 80% relative humidity capacity performance as a percentage of each
design’s 50% relative humidity performance on the 620 ohm, 16 h/day test at 20°C.

620 ohm 16 h/day percent retention
after 7 days 20°C open stand 95% confidence interval for the mean
100%

Relative capacity retention 80%
90%

70%

60%

Humidity 20% 50% 80% 20% 50% 80% 20% 50% 80%
design A B C
FiGURE 13.36 The percentage retention of the initial capacity on the 620 ohm, 16 h/day test after 7 days
open stand in 20, 50, and 80% relative humidity open stand at 20°C.

was changed to 16 to 18 days, a significant loss to performance occurred at 20% relative humidity.
Design B with the middle limiting current range and higher internal battery relative humidity had a
15% performance loss in the low-humidity test environment.
Figure 13.36 summarizes the percent of the initial performance the various designs obtained on
the moderate drain 620 ohm test after 7 days open stand. For instance, a sample of design C was left