Page 319 - Lindens Handbook of Batteries
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BUTTOn CELL BATTErIES: SILVEr OxIDE–ZInC AnD ZInC-AIr SYSTEmS 13.25
35
30
120 mA cathode
25
Limiting current, mA 20 90 mA cathode LC
15
10
5
0
0 2 4 6 8 10 12
Total circumference of air holes, mm
FiGURE 13.22 Battery limiting current as a function of air hole circumference and cathode limiting
current in a Pr48 (13) battery.
0
–5
–10
mg weight change –15
–20
–25
–30
10 15 20 25 30
Cell limiting current, mA
FiGURE 13.23 Pr48 (13) weight loss vs. cell limiting current after 6 days at 20°C, 20% rH.
the primary source of cell weight loss, the water vapor transport rate is directly related to cell limiting
current in a low-humidity environment.
In Fig. 13.24, a cell limiting current versus water vapor transport relationship also exists in high-
humidity conditions. A high cell limiting current increases the water vapor transport rate, increasing
the cell weight gain.
