IEC 62973-2-2020 pdf free.Railway applications – Rolling stock – Batteries for auxiliary power supply systems – Part 2: Nickel Cadmium (NiCd) batteries.
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.
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 60623:2017, Secondary cells and batteries containing alkaline or other non-acid electrolytes — Vented nickel-cadmium prismatic rechargeable single cells
IEC 61373:2010, Railway applications — Rolling stock equipment — Shock and vibration test
IEC 62259:2003, Secondary cells and batteries containing alkaline or other non-acid electrolytes — Nickel cadmium prismatic secondary single cells with partial gas recombination
IEC 62485-2:2010, Safety requirements for secondary batteries and battery installations — Part 2: Stationary batteries
IEC 62973-1:2018, Railway applications Rolling stock — Batteries for auxiliary power supply systems — Part 1: General requirements
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
4 General requirements
Definitions of components of a battery system, refer to Figure 1 (images are examples)
Some batteries may not include all the above components, e.g. single cells may be installed in a tray without crates.
4.2 Definitions of NiCd battery type
4.2.1 General
A battery consists of several cells or monoblocs, and!or assembled in trays, crates, and then assembled in a battery box. Internally, each cell has plate stacks consisting of several positive and negative plates that are separated by a single or multilayer separator. These are held by a supporting structure which in turn are connected to positive and negative terminals that extend to the outside of the cell container.
The positive active material is nickel hydroxide, and the negative active material is cadmiumhydroxide.IEC 62973-2 pdf free download.