CSA/ANSI C22.2 NO. 350:25

Preface This is the first edition of CSA/ANSI C22.2 No. 350, Test method for safety and performance of thermal barriers for use in batteries and battery-based energy storage systems . It is one of a series of Standards issued under Part II of the Canadian Electrical Code. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This Standard was prepared by the Working Group on Thermal Barriers Safety for Batteries and Energy Storage Systems, under the jurisdiction of the Subcommittee on Batteries and Battery Systems, the Technical Committee on Energy Storage Equipment & Systems, and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. Scope 1.1 Purpose This Standard provides requirements to properly assess the thermal and mechanical performance of thermal barriers used between cells in battery packs and battery systems. The purpose of this Standard is to provide testing requirements for thermal barriers used in battery packs and battery systems intended to limit the propagation of thermal runaway and to provide criteria to categorize thermal barriers based on their performance. Thermal barrier material’s property when tested according to this Standard may vary based on its use in a battery and in battery systems. Test results of this material property will provide thermal barrier property details for comparison with different materials. Testing for propagation of thermal runaway is to be conducted to meet the end product requirement. 1.2 Terminology In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.