Gas-pressure studies with Li(Si)/FeS{sub 2} thermal batteries
The internal gas pressure of thermal batteries can serve as an indicator of proper functioning. In the case of overheated batteries, venting of the gases can occur. Little information is available, however, as to the magnitude of the internal gas pressure under normal operating conditions. A study was undertaken to monitor the internal gas pressure of Li(Si)/FeS{sub 2} thermal batteries during discharge via a pressure transducer attached to the battery case. Factors that could influence the pressure were examined and included: temperature, FeS{sub 2} particle size, catholyte composition (lithiated vs. unlithiated), catholyte processing (fused vs. unfused), anode composition (flooded vs. unflooded), discharge load, and the presence of Li{sub 2}O in the separator. Representative gas examples were also taken during discharge for analysis by gas chromatography. The gas pressure was strongly influenced by the migration of electrolyte from the separator into the catholyte and anode during activation and discharge which impacted the gettering of gases by the anode.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10134535
- Report Number(s):
- SAND--91-2348C; CONF-920669--3; ON: DE92010801
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250901
250902
36 MATERIALS SCIENCE
360606
DESIGN AND DEVELOPMENT
ELECTRICAL PROPERTIES
ELECTROLYTES
GAS CHROMATOGRAPHY
IRON SULFIDES
LITHIUM
MATERIALS
MONITORING
PARTICLE SIZE
PERFORMANCE AND TESTING
PHYSICAL PROPERTIES
PRESSURE MEASUREMENT
SILICON
TEMPERATURE DEPENDENCE
THERMAL BATTERIES