Standards Development

Scope

This document specifies test procedures and acceptance criteria for safety performance of secondary sodium-ion cells and cell blocks used for propulsion of electric vehicles (EV) including battery electric vehicles (BEV) and hybrid electric vehicles (HEV).

This document determines the basic safety performance of cells used in a battery pack and system under intended use and reasonably foreseeable misuse or incident, during the normal operation of the EV. The safety requirements of the cell in this document are based on the premise that the cells are properly used in a battery pack and system within the limits for voltage,current and temperature as specified by the cell manufacturer (cell operating region).

The evaluation of the safety of cells during transport and storage is not covered by this document. 

NOTE 1 The safety performance requirements for sodium-ion battery packs and systems are defined in ISO 6469 1.

Purpose

Sodium-ion cells work similarly to lithium-ion cells in a rocking chair, relying on sodium ions to move between the positive and negative electrodes. In recent years, sodium-ion cells have gradually entered the stage of large-scale production. With the increase in industrial investment, maturation of technology, and gradual improvement of the industrial chain, sodium-ion cells are expected to become an important complement to lithium-ion cells. The specification of sodium-ion cells in electric vehicles is p roposed due to the characteristics of lower cost, better low-temperature performance, and higher safety. Sodium-ion cells are considered the ideal choice for power cells. However, the international standard system for sodium-ion cells has not yet been established. There is no unified international standard for the development, production, testing, application, and maintenance of sodium-ion cells. The existence of these issues significantly hinders the practical application of sodium-ion cells and does not support the further enhancement of productivity. Therefore, it is urgent to establish a corresponding international standard system for sodium-ion cells modeled after lithium-ion cells to better guide and promote the practical application of sodium-ion cells.