IEEE 1679.2-2018

This document provides guidance for an objective evaluation of Sodium-Beta energy storage technology by a potential user for any stationary application. This document is to be used in conjunction with IEEE Std 1679¿¿¿ IEEE Recommended Practice for the Characterization and Evaluation of Emerging Energy Storage Technologies in Secondary Applications. For the purposes of this document, Sodium-Beta batteries include those secondary (rechargeable) electro-chemistries with sodium as the active species exchanged between the electrodes during charging and discharging, and operating above the melting point of sodium. These batteries use a solid ¿¿¿¿¿-alumina electrolyte, typically written as ¿¿¿¿¿-alumina. Examples of secondary Sodium-Beta batteries are sodium-metal chloride and sodium-sulfur batteries. Non-rechargeable batteries are beyond the scope of this document. The outline of IEEE Std 1679 is followed in this document, with tutorial information specific to Sodium-Beta batteries provided as appropriate. Examples of tutorial information include technology descriptions, operating parameters, failure modes, safety information, battery architecture, and qualification and application considerations. This document does not cover sizing, installation, or routine maintenance and testing requirements, except insofar as they may influence the evaluation of a Sodium-Beta battery for its intended application.