IEC 61960-4:2020 pdf download

IEC 61960-4:2020 pdf download.Secondary cells and batteries containing alkaline or other non-acid electrolytes
1 Scope
This part of IEC 61960 specifies performance tests, designations, markings, dimensions and other requirements for coin secondary lithium cells and batteries for portable applications and backup power supply such as memory backup applications. The objective of this document is to provide the purchasers and users of coin secondary lithium cells and batteries with a set of criteria with which they can assess the performance of coin secondary lithium cells and batteries offered by various manufacturers. This document defines a minimum required level of performance and a standardized methodology by which testing is performed and the results of this testing reported to the user. Hence, users will be able to establish the viability of commercially available cells and batteries via the declared specification and thus be able to select the cell or battery best suited for their intended application. This document covers coin secondary lithium cells and batteries with a range of chemistries. Each electrochemical couple has a characteristic voltage range over which, during discharge, it releases its electrical capacity, a characteristic nominal voltage and a characteristic end-of- discharge voltage. Users of coin secondary lithium cells and batteries are requested to consult the manufacturer for advice. This document also provides guidelines for designers of equipment using lithium batteries (see Annex A).
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 60050-482:2004, International Electrotechnical Vocabulary (IEV) – Part 482: Primary and secondary cells and batteries IEC 62133-2:2017, Secondary cells and batteries containing alkaline or other non-acid electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications – Part 2: Lithium systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-482 and the following apply.3.1 charge recovery capacity recovery capacity that a cell or battery can deliver with subsequent recharge, after storage at a specific temperature, for a specific time, as a percentage of the rated capacity 3.2 coin cell coin battery small round cell or battery where the overall height is less than the diameter, containing non-aqueous electrolyte 3.3 end-of-discharge voltage specified closed circuit voltage at which a discharge of a cell or battery is terminated [SOURCE: IEC 60050-482:2004, 482-03-30, modified – The synonyms “final voltage”, “cut-off voltage”, and “end-point voltage” have been omitted and the words “closed circuit” and “cell” have been added to the definition.] 3.4 nominal voltage suitable approximate value of voltage used to designate or identify a cell, or a battery Note 1 to entry: The nominal voltages of coin secondary lithium cells are shown in Table 1. [SOURCE: IEC 60050-482:2004, 482-03-31, modified – “electrochemical system” has been omitted from the definition and the note has been added.] 3.5 rated capacity quantity of electricity mAh (milliampere-hours) that a single cell or battery can deliver, when charged, stored and discharged under specified conditions and declared by the manufacturer 3.6 secondary lithium battery unit which incorporates one or more secondary lithium cells and which is ready for use Note 1 to entry: This unit incorporates adequate housing and a terminal arrangement and may have electronic control devices. 3.7 secondary lithium cell secondary cell whose electrical energy is derived from oxidation and the reduction of lithium Note 1 to entry: This cell is not ready for use in an application because it is not yet fitted with its final housing, terminal arrangement and electronic control device.