PULSE CHARACTERISTICS OF SODIUM SULFUR CELLS FOR ELECTRIC VEHICLE PROPULSION

Sodium-sulfur cells have been tested under steady and pulse load conditions at 350 deg C. The power and energy delivered during the pulses are found to be a function of the state of charge of the battery, decreasing sharply as the cell approaches the fully discharged state. Peak power densities in excess of one watt per square centimeter of ceramic electrolyte surface have been achieved for periods as long as 15 seconds. These peak values exceed extrapolated steady state data. The Na/S cell is extremely efficient in accepting pulse charging. The superior regeneration characteristics are due to the presence of discharge products near the ceramic electrolyte-graphite felt electrode interface. These characteristics are especially useful for electric vehicle propulsion.

Media Info

  • Pagination: p. 662-665

Subject/Index Terms

Filing Info

  • Accession Number: 00193327
  • Record Type: Publication
  • Report/Paper Numbers: SAE 789393
  • Files: TRIS
  • Created Date: Jun 13 1979 12:00AM