oSIST prEN IEC 60623:2025

SLOVENSKI STANDARD
01-september-2025
Sekundarni členi in baterije z alkalnimi ali drugimi nekislinskimi elektroliti - Zračeni
nikelj-kadmij prizmatični ponovno polnljivi členi in baterije za industrijsko uporabo
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Vented
nickel-cadmium prismatic rechargeable cells and batteries for use in industrial
applications.
Akkumulatoren und Batterien mit alkalischen oder anderen nicht-säurehaltigen
Elektrolyten - Geschlossene prismatische wiederaufladbare Nickel-Cadmium-
Einzelzellen
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Batteries et
éléments parallélépipédiques rechargeables ouverts au nickel-cadmium pour application
industrielle
Ta slovenski standard je istoveten z: prEN IEC 60623:2025
ICS:
29.220.99 Drugi členi in baterije Other cells and batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

21A/935/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60623 ED6
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-07-25 2025-10-17
SUPERSEDES DOCUMENTS:
21A/903/CD, 21A/908A/CC
IEC SC 21A : SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR OTHER NON-ACID ELECTROLYTES
SECRETARIAT: SECRETARY:
France Mr Jean-Marie Bodet
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

TC 21
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Vented nickel-
cadmium prismatic rechargeable cells and batteries for use in industrial applications.

PROPOSED STABILITY DATE: 2026
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NOTE FROM TC/SC OFFICERS:
The compilation of comments has been analyzed and solved by the project team. The resolved comments have
been presented during IEC SC21A WG1 Virtual Meeting on 2025-04-07 and approved by the members of the
WG1.
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Link to Committee Draft for Vote (CDV) online document:
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IEC 60623 ED6 © DRAFT © IEC:2025 21A/935/CDV
IEC 2025
CONTENTS
CONTENTS . 1
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
3.1 Terms and definitions. 7
3.2 Abbreviated terms . 10
4 Parameter measurement tolerances . 10
5 Designation and marking . 11
5.1 Cell designation (mandatory) . 11
5.2 Cell designation (optional) . 11
5.3 Cell termination . 11
5.4 Battery designation . 12
5.4.1 Battery structure formulation . 12
5.4.2 Definitions of components of a battery system . 12
5.4.3 Classes of usage of battery system . 15
5.5 Marking . 16
5.6 Safety recommendations . 16
6 Dimensions . 16
7 Electrical tests for cells . 18
7.1 General . 18
7.2 Charging procedure for test purposes . 18
7.2.1 General . 18
7.2.2 Charge procedure based on constant current . 18
7.2.3 Charge procedure based on constant voltage at a given current . 18
7.2.4 Rapid charge current . 19
7.3 Discharge performances . 19
7.3.1 General . 19
7.3.2 Discharge performance at 20 °C . 19
7.3.3 Discharge performance at +5 °C . 20
7.3.4 Discharge performance at −18 °C . 20
7.3.5 Discharge performance at low temperature . 21
7.3.6 Discharge performance at high temperature . 22
7.3.7 High-rate current test . 22
7.3.8 Measurement of the internal DC resistance . 23
7.3.9 Pulse power calculation . 25
7.3.10 Constant power measurement test . 26
7.4 Charge retention . 26
7.4.1 Test method . 26
7.4.2 Acceptance criterion . 27
7.5 Endurance for cells . 27
7.5.1 Test conditions . 27
7.5.2 Endurance in cycles . 27
7.5.3 Final test after completion of endurance in cycles test . 28
7.5.4 Determination of durability parameters . 29
IEC 60623 ED6 © DRAFT © IEC:2025 21A/935/CDV
IEC 2025
7.5.5 Permanent charge endurance (optional) . 29
7.6 Charge acceptance at constant voltage. 30
7.6.1 Test method . 30
7.6.2 Acceptance criterion . 31
7.7 Vent plug operation . 31
7.8 Electrolyte retention test . 31
7.8.1 General . 31
7.8.2 Test method . 31
7.8.3 Acceptance criteria . 31
7.9 Storage . 31
7.9.1 Test method . 31
7.9.2 Acceptance criteria . 32
7.10 Overcharge . 32
8 Mechanical tests . 32
9 Physical appearance . 32
10 Requirements at battery level . 32
10.1 General requirements . 32
10.2 Environmental conditions . 32
10.3 Operating voltage range of the battery system . 32
10.4 Optional additional components to battery system. 33
10.4.1 General . 33
10.4.2 Battery information system . 33
10.4.3 Battery heater . 34
10.4.4 Thermostat or cut-off switch . 34
10.4.5 Mounting racks . 34
10.4.6 Deported components . 34
11 Performance requirement for the battery system . 34
11.1 Design energy and power calculation methodology . 34
11.1.1 General . 34
11.1.2 Requirements for battery capacity sizing . 35
11.1.3 Expected lifetime in years for the battery system . 36
11.1.4 Deep discharge of batteries . 37
11.1.5 Documentation . 37
11.2 End of life performance . 37
12 Conditions for approval and acceptance . 38
12.1 Type approval . 38
12.2 Batch acceptance . 39
Annex A (normative) CCCV charge methodology . 40
Annex B (normative) Ni-Cd load profile verification documentation . 42
B.1 General .
...