IEC 62973-4-2021 pdf free

IEC 62973-4-2021 pdf free.Railway applications – Rolling stock – Batteries for auxiliary power supply systems – Part 4: Secondary sealed nickel-metal hydride batteries.
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://wwwiso.orglobp.
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 Ito 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, 482-05-1 7J
3.1.4 secondary cell cell which is designed to be electrically recharged.IEC 62973-4 pdf free download.