IEC 62259 pdf download Secondary cells and batteries containing alkaline or other non-acid electrolytes – Nickel-cadmium prismatic secondary single cells with partial gas recombination
This International Standard specifies marking，designation，dimensions,tests and require-ments for vented nickel-cadmium prismatic secondary single cells where special provisionshave been made in order to have partial or，under very specific conditions,full gasrecombination.
NOTE ln this context, “prismatic” refers to cells having rectangular sides and base.
When there exists an lEC standard specifying test conditions and requirements for cells usedin special applications and which is in conflict with this standard， the former shall takeprecedence.
The following referenced documents are indispensable for the application of this document.For dated references,only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60050-486,International Electrotechnical Vocabulary (IEV) – Chapter 486: Secondarycells and batteries
IEC 60051 (all parts), Direct acting indicating analogue electrical measuring instruments andtheir accessories
IEC 60410,Sampling plans and procedures for inspection by attributesIEC 60417-DB:20021,Graphical symbols for use on equipment
IEC 60485, Digital electronic d.c. voltmeters and d.c. electronic analogue-to-digital converters
IEC 61434，Secondary cells and batteries containing alkaline or other non-acid electrolytes -Guide to the designation of current in alkaline secondary cell and battery standards
IEC 61438，Possible safety and health hazards in the use of alkaline secondary cells andbatteries – Guide to equipment manufacturers and users
3 Terms and definitions
For the purposes of this document, the terms and definitions contained in IEC 60050-486 and
the following apply.
a secondary cell having a cover provided with an opening through which gaseous products may escape
NOTE The opening may be fitted with a venting system, which may include an overpressure vent.
the nominal voltage of a vented nickel-cadmium rechargeable single cell with partial gas recombination is 1 ,2 V
quantity of electricity C 5 Ah (ampere hours), declared by the manufacturer, which a single cell can deliver during a 5 h period when charged, stored and discharged under the conditions
specified in clause 7.2.1
partial gas recombination
ability of a cell to recombine most of the gases evolved during charging under the conditions specified in 7.9
4 Parameter measurement tolerances
The overall accuracy of controlled or measured values, relative to the specified or actual values, shall be within these tolerances:
a) + 1 % . for voltage;
b) + 1 % for current;
c) + 2 °C for temperature;
d) + 0,1 % for time;
e) + 1 % for capacity;
f) + 5 % for gas volume.
These tolerances comprise the combined accuracy of the measuring instruments, the measurement techniques used and all other sources of error in the test procedure.
For assistance in selecting instrumentation, see IEC 60051 for analogue instruments and IEC 60485 for digital instruments. The details of the instrumentation used shall be provided in any report of results.