IEC 62973-2:2020 pdf download

IEC 62973-2:2020 pdf download.Railway applications – Rolling stock – Batteries for auxiliary power supply systems
1 Scope
This part of IEC 62973 applies to NiCd rechargeable batteries for auxiliary power supply systems used on railway vehicles. It is an extension of IEC 62973-1:2018 which specifies common requirements for all battery technologies of other parts of IEC 62973. Unless otherwise specified, the requirements of IEC 62973-1:2018 apply. Battery systems described in this document are used in conjunction with charging systems onboard rolling stock, as described in IEC 62973-1:2018. Charging systems (e.g. LVPS, converters, etc.) are excluded from the scope of this document. This document also specifies the design, operation parameters, safety recommendations, routine and type tests, as well as marking and designation. This document is used in addition to IEC 60623:2017 or IEC 62259:2003 for NiCd Cells. Specific requirements on subcomponents within the battery systems are covered in this document, e.g. temperature measurement components. When there is an existing IEC standard specifying additional test conditions and requirements for NiCd batteries used in specific railway applications and which conflicts with this document, the latter takes precedence. The main objective of this document is to achieve standardization of the electrical interfaces by considering NiCd battery parameters to allow for calculating the NiCd battery capacity required for a specific load profile.
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 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 battery crate container with frame walls for holding several cells or batteries Note 1 to entry: Refer to 4.1 and Clause 5. [SOURCE: IEC 60050-482:2004/AMD1:2016, 482-05-10, modified – Note 1 to entry has been added.] 3.1.2 battery tray container with a base and walls for holding several cells or batteries Note 1 to entry: Refer to 4.1 and Clause 5. [SOURCE: IEC 60050-482:2004/AMD1:2016, 482-02-35, modified – Note 1 to entry has been added.] 3.1.3 cell basic functional unit of NiCd battery, 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 [SOURCE: IEC 60050-482:2004/AMD1:2016, 482-01-01, modified – Note has been deleted and the specific use “of NiCd battery” has been added.] 3.1.4 monobloc battery battery with multiple separate but electrically connected cell compartments each of which is designed to house an assembly of electrodes, electrolyte, terminals or interconnections and possible separators Note 1 to entry: The cells in a monobloc battery can be connected in series or in parallel. [SOURCE: IEC 60050-482:2004, 482-02-17]3.1.5 nickel cadmium battery secondary battery with an alkaline electrolyte, a positive electrode containing nickel oxide and a negative electrode of cadmium [SOURCE: IEC 60050-482:2004/AMD1:2016, 482-05-02, modified – A synonym has been removed.] 3.1.6 rated capacity, <for railway NiCd cell> C n capacity value of a battery determined under IEC 60623:2017 specified conditions and declared by the battery manufacturer 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. 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. 3.1.9 ageing factor, <for railway NiCd cell> quantitative factor expressing the degradation in the ability of the battery, due to usage, to deliver electrical energy under specified operating conditions such as, but not limited to, operating ambient temperature, cycling considering depth of discharge (DOD), and maintenance practices