Renata SA Safety Guidelines - Manual (Page 6)

UL safety tests
Safety Guidelines
56
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Temperature Cycling
Eighteen button cells of each CR2032 and
CR2430 were left in following conditions. The
cells were exposed to alternate temperatures of
+20° and +100°C. The batteries were submitted
to these temperatures in 60 cycles of two hours
each and then discharged over a load of 8,25 k
Ohms down to 2 volts in order to detect remaining
capacity.
The cells showed no visible change as
a result of the temperature cycling and relevant
discharge results are shown in the diagrams of
this page.
Results
Ten each of the Modules 1000-2 and 500-1 were
conditioned in this exposure. The modules were
exposed to alternate temperatures of -54°C
(-65°F) and 71°C (160°F) for a total of ten
exposures at each temperatures. The modules
were exposed at each temperature for periods of
16 h with 8 h periods at room temperature
between each exposure. The temperatures of the
oven and the cold box were monitored by means of iron-constantan thermo-couples connected to a
recording potentiometer.
None of the modules had a weight loss
greater than 0.01 g and the maximum change in
open circuit voltages was 0.1 V. There were no
visible changes as a result of this exposure.
Results
"Further tests have been executed, mainly with
Models 500-1 and 1000-2: Discharge, Drop Test,
Vibration Test, Oven Exposure and Humidity Test."