Conceptual design of a sodium sulfur cell for US electric-van batteries

Abstract

A conceptual design of aaa advanced sodium/sulfur cell for U.S. electric-van applications has been completed. The important design factors included specific physical and electrical requirements, service life, manufacturability, thermal management, and safety. The capacity of this cell is approximately the same as that for the "PB" cell being developed by Silent Power Limited (10 Ah). The new cell offers a 50% improvement in energy capacity and ne_z_,lya 100% improvement in peak power over the existing PB cells. A battery constructed with such cells would significantly exceed the USABC's mid-term performance specifications. In addition, a similar cell and battery • design effort was completed for an advanced passenger car application. A battery using the van cell would have nearly 3 times the energy compared to lead-acid batteries, yet weigh 40% less; a present-day battery using a cell • specifically designed for this car would provide 50% more energy in a package 60% smaller and 50% lighter. MTER

Operational Strategies to Improve the Performance and Long‐Term Cyclability of Intermediate Temperature Sodium‐Sulfur Batteries

“…[18] The commercialized HT-NaS and Zebra battery technologies prefer the central sodium anode to be encapsulated by tubular BASE than the stacked planner cell designed with flat plate BASE, owing to safety reasons and simplified manufacturing process. [19] To reduce the operating temperature, the cathodic side of IT-NaS was altered by presolvating the sulfur/polysulfide mixture in an organic solvent analogous to the one used in RT-NaS's electrolytes. [13,14,16] The selection of suitable organic solvent and co-solvent with adequate solubility for sulfur/polysulfide is of paramount importance, together with thermal, chemical, and electrochemical stability.…”

Dynamic Modeling of Sodium Sulfur Battery Grid Storage Units

“…The main goal of this research was to design a common sodium sulfur cell (and a module) that can be used in electric utility vans. Several cell configurations were evaluated and compared in terms of the medium risk option, calendar life and overall size of the cell[15].As discussed above, sodium-sulfur batteries can be used for a wide variety of applications including renewable integration, peak shaving(Figure 1.1) and load leveling(Figure 1.2), emergency backup power and distributed energy storage system (DESS)[2].…”