IEC 62973-4:2021 pdf download

IEC 62973-4:2021 pdf download.Railway applications – Rolling stock – Batteries for auxiliary power supply systems
1 Scope
This part of IEC 62973 applies to secondary sealed nickel-metal hydride battery technologies for auxiliary power supply systems used on rolling stock. This document specifies the requirements of the characteristics and tests for the sealed nickel-metal hydride cells and supplements IEC 62973-1 which applies to any rolling stock types (e.g. light rail vehicles, tramways, streetcars, metros, commuter trains, regional trains, high speed trains, locomotives, etc.). Unless otherwise specified, the requirements of IEC 62973-1 apply. This document also specifies the requirements of the interface between the batteries and the battery chargers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60051 (all parts), Direct acting indicating analogue electrical measuring instruments and their accessories IEC 60077-1, Railway applications – Electric equipment for rolling stock – Part 1: General service conditions and general rules IEC 62485-2, Safety requirements for secondary batteries and battery installations – Part 2: Stationary batteries IEC 62675 , Secondary cells and batteries containing alkaline or other non-acid electrolytes – Sealed nickel-metal hydride prismatic rechargeable single cells IEC 62902:2019, Secondary cells and batteries – Marking symbols for identification of their chemistry IEC 62973-1:2018, Railway applications – Rolling stock – Batteries for auxiliary power supply systems – Part 1: General requirements IEC 63115-1:2020, Secondary cells and batteries containing alkaline or other non-acid electrolytes – Sealed nickel-metal hydride cells and batteries for use in industrial applications – Part 1: Performance IEC 63115-2:2021, Secondary cells and batteries containing alkaline or other non-acid electrolytes – Sealed nickel-metal hydride cells and batteries for use in industrial applications – Part 2: Safety
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http://www.electropedia.org/; ISO Online browsing platform: available at http://www.iso.org/obp. NOTE All typical battery related descriptions are defined in IEC 60050-482. 3.1.1 nickel-metal hydride battery Ni-MH battery secondary battery with an electrolyte of aqueous potassium hydroxide, a positive electrode containing nickel as nickel hydroxide and a negative electrode of hydrogen in the form of a metal hydride Note 1 to entry: Nickel-metal hydride battery contains assembly of sealed cells. [SOURCE: IEC 60050-482:2004, 482-05-08, modified – Abbreviation and Note 1 to entry have been added.] 3.1.2 cell basic functional unit, consisting of an assembly of electrodes, electrolyte, container, terminals and usually separators, that is a source of electric energy obtained by direct conversion of chemical energy Note 1 to entry: In this document cell means secondary sealed nickel-metal hydride cell, [SOURCE: IEC 60050-482:2004, 482-01-01, modified – Note 1 to entry has been replaced.] 3.1.3 sealed cell cell which remains closed and does not release either gas or liquid when operated within the limits specified by the manufacturer Note 1 to entry: A sealed cell may be equipped with a safety device to prevent a dangerously high internal pressure and is designed to operate during its life in its original sealed state. [SOURCE: IEC 60050-482:2004, 482-05-17]3.1.7 state of charge SOC remaining capacity to be discharged, normally expressed as a percentage of the full battery rated capacity as expressed in relevant standards Note 1 to entry: Practical definitions of SOC are dependent upon chosen technologies. [SOURCE: IEC 62973-1:2018, 3.1.6] 3.1.8 depth of discharge DOD capacity removed from a battery during discharge in relation to its full rated capacity expressed as a percentage Note 1 to entry: It is the complement of SOC. Note 2 to entry: As one increases, the other decreases by the same amount. Note 3 to entry: Practical definitions of DOD are dependent upon chosen technologies. [SOURCE: IEC 62973-1:2018, 3.1.7] 3.1.9 end user organization which operates the battery system Note 1 to entry: The end user is normally an organization which operates the vehicle equipped with the battery system, unless the responsibility is delegated to a main contractor or consultant. [SOURCE: IEC 62973-1:2018, 3.1.11] 3.1.10 system integrator organization which has the technical responsibility of the complete battery system and charging system Note 1 to entry: The system integrator can be the end user or the train manufacturer, or none of them. [SOURCE: IEC 62973-1:2018, 3.1.12]