Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary sealed cells and batteries for portable applications - Part 1: Nickel-Cadmium

IEC 61951-1:2017 specifies marking, designation, dimensions, tests and requirements for secondary sealed nickel-cadmium small prismatic, cylindrical and button cells and batteries, suitable for use in any orientation, for portable applications.
This edition includes the following significant technical changes with respect to the previous edition:
- addition of battery type;
- revision of Figure 3 (6.1.3.1);
- addition of “Optional pip” note to positive contact;
- changed leader line position from pip to flats of positive contact (B and G).

Accumulateurs alcalins et autres accumulateurs à électrolyte non-acide - Accumulateurs étanches pour applications portables - Partie 1: Nickel-Cadmium

L'IEC 61951-1:2017 spécifie le marquage, la désignation, les dimensions, les essais et les exigences applicables aux éléments et batteries d’accumulateurs parallélépipédiques, cylindriques et boutons, étanches, au nickel-cadmium, pouvant être utilisés dans toutes les orientations, pour applications portables.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- ajout du type de batterie;
- révision de la Figure 3 (6.1.3.1);
- ajout de la note "picot facultatif" au contact positif;
- modification de la position de la ligne de repère du picot aux surfaces planes du contact positif (B et G).

General Information

Status
Published
Publication Date
06-Mar-2017
Current Stage
PPUB - Publication issued
Start Date
07-Mar-2017
Completion Date
07-Mar-2017
Ref Project

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IEC 61951-1
Edition 4.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Secondary sealed cells and batteries for portable applications –
Part 1: Nickel-cadmium
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –
Accumulateurs étanches pour applications portables –
Partie 1: Nickel-cadmium
IEC 61951-1:2017-03(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 61951-1
Edition 4.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Secondary sealed cells and batteries for portable applications –
Part 1: Nickel-cadmium
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –
Accumulateurs étanches pour applications portables –
Partie 1: Nickel-cadmium
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.30 ISBN 978-2-8322-4010-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61951-1:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 7

4 Parameter measurement tolerances ................................................................................ 9

5 Cell and battery designation and marking ........................................................................ 9

5.1 Cell and battery designation .................................................................................... 9

5.1.1 Small prismatic cells and cylindrical cells ......................................................... 9

5.1.2 Button cells.................................................................................................... 11

5.1.3 Batteries ........................................................................................................ 11

5.2 Cell or battery termination ..................................................................................... 11

5.3 Marking ................................................................................................................. 11

5.3.1 Small prismatic cells and cylindrical cells ....................................................... 11

5.3.2 Button cells.................................................................................................... 12

5.3.3 Batteries ........................................................................................................ 12

5.4 Exemption of wording............................................................................................ 12

6 Dimensions.................................................................................................................... 12

6.1 Small prismatic cells and cylindrical cells .............................................................. 12

6.1.1 General ......................................................................................................... 12

6.1.2 Small prismatic cells ...................................................................................... 13

6.1.3 Cylindrical cells ............................................................................................. 13

6.2 Button cells ........................................................................................................... 15

7 Electrical tests ............................................................................................................... 16

7.1 General ................................................................................................................. 16

7.2 Charging procedure for test purposes ................................................................... 16

7.2.1 Charging procedure for cell............................................................................ 16

7.2.2 Charging procedure for battery ...................................................................... 16

7.3 Discharge performance ......................................................................................... 17

7.3.1 General ......................................................................................................... 17

7.3.2 Discharge performance at 20 °C .................................................................... 17

7.3.3 Discharge performance at –18 °C .................................................................. 19

7.3.4 Discharge performance for rapid charge cells (R cells) .................................. 20

7.4 Charge (capacity) retention ................................................................................... 20

7.5 Endurance ............................................................................................................ 20

7.5.1 Endurance in cycles....................................................................................... 20

7.5.2 Permanent charge endurance ........................................................................ 24

7.6 Charge acceptance at constant voltage ................................................................. 28

7.7 Overcharge ........................................................................................................... 28

7.7.1 Small prismatic cells ...................................................................................... 28

7.7.2 L, M, H or X cylindrical and button cells ......................................................... 29

7.7.3 LT/LU, MT/MU or HT/HU cylindrical cells ....................................................... 29

7.7.4 J cylindrical cells ........................................................................................... 29

7.7.5 JT cylindrical cells ......................................................................................... 30

7.7.6 R cylindrical cells ........................................................................................... 30

7.8 Safety device operation ........................................................................................ 31

---------------------- Page: 4 ----------------------
IEC 61951-1:2017 © IEC 2017 – 3 –

7.9 Button cells or batteries storage, small prismatic cells or batteries storage,

cylindrical cells or batteries storage ...................................................................... 31

7.10 Charge acceptance at +55 °C for LT, MT or HT cylindrical cells ............................ 32

7.11 Trickle charge acceptance for JT cylindrical cells .................................................. 32

7.12 Internal resistance ................................................................................................ 33

7.12.1 General ......................................................................................................... 33

7.12.2 Measurement of the internal AC resistance .................................................... 33

7.12.3 Measurement of the internal DC resistance ................................................... 34

8 Mechanical tests ............................................................................................................ 34

9 Safety requirements ...................................................................................................... 34

10 Type approval and batch acceptance ............................................................................. 34

10.1 General ................................................................................................................. 34

10.2 Type approval ....................................................................................................... 35

10.2.1 Type approval for small prismatic cells .......................................................... 35

10.2.2 Type approval for cylindrical and button cells ................................................ 35

10.2.3 Type approval for batteries ............................................................................ 37

10.3 Batch acceptance ................................................................................................. 38

Bibliography .......................................................................................................................... 40

Figure 1 – Jacketed cylindrical cells ...................................................................................... 13

Figure 2 – Jacketed small prismatic cells .............................................................................. 13

Figure 3 – Jacketed cells dimensionally interchangeable with primary cells .......................... 14

Figure 4 – Button cells .......................................................................................................... 15

Table 1 – Dimensions of jacketed small prismatic cells ......................................................... 13

Table 2 – Dimensions of jacketed cylindrical cells dimensionally interchangeable with

primary cells ......................................................................................................................... 14

Table 3 – Dimensions of jacketed cylindrical cells not dimensionally interchangeable

with primary cells .................................................................................................................. 15

Table 4 – Dimensions of button cells..................................................................................... 16

Table 5 – Discharge performance at 20 °C for small prismatic cells and cylindrical cells ....... 17

Table 6 – Discharge performance at 20 °C for button cells .................................................... 18

Table 7 – Discharge performance at 20 °C for batteries ........................................................ 18

Table 8 – Rated capacity (mAh) compliance test (example) .................................................. 19

Table 9 – Discharge performance at –18 °C for small prismatic cells .................................... 19

Table 10 – Discharge performance at –18 °C for cylindrical cells .......................................... 19

Table 11 – Discharge performance at –18 °C for button cells ................................................ 20

Table 12 – Endurance in cycles for small prismatic cells and cylindrical cells not

dimensionally interchangeable with primary cells .................................................................. 21

Table 13 – Endurance in cycles for cylindrical cells dimensionally interchangeable with

primary cells ......................................................................................................................... 21

Table 14 – Endurance in cycles for H or X cells .................................................................... 22

Table 15 – Endurance in cycles for cylindrical X cells ........................................................... 22

Table 16 – Endurance in cycles for HR or XR cells ............................................................... 23

Table 17 – Endurance in cycles for button cells .................................................................... 23

Table 18 – Permanent charge endurance for L, M, J, H or X cylindrical cells......................... 24

---------------------- Page: 5 ----------------------
– 4 – IEC 61951-1:2017 © IEC 2017

Table 19 – Permanent charge endurance for button cells ...................................................... 24

Table 20 – Permanent charge endurance for LT, MT, or HT cylindrical cells ......................... 26

Table 21 – Permanent charge endurance for LU, MU, or HU cylindrical cells ........................ 28

Table 22 – Overcharge at 0 °C .............................................................................................. 29

Table 23 – Capacity deterioration due to storage period for cells or batteries ........................ 32

Table 24 – Charge and discharge at +55 °C .......................................................................... 32

Table 25 – Trickle charge acceptance for JT cylindrical cells ................................................ 33

Table 26 – Constant discharge currents used for measurement of DC resistance ................. 34

Table 27 – Sequence of tests for type approval for small prismatic cells ............................... 35

Table 28 – Sequence of tests for type approval for cylindrical cells ....................................... 36

Table 29 – Sequence of tests for type approval for button cells ............................................. 37

Table 30 – Sequence of tests for type approval for batteries ................................................. 38

Table 31 – Recommended test sequence for batch acceptance ............................................ 39

---------------------- Page: 6 ----------------------
IEC 61951-1:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SECONDARY SEALED CELLS AND BATTERIES
FOR PORTABLE APPLICATIONS –
Part 1: Nickel-cadmium
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61951-1 has been prepared by subcommittee 21A: Secondary

cells and batteries containing alkaline or other non-acid electrolytes, of IEC technical

committee 21: Secondary cells and batteries.

This fourth edition cancels and replaces the third edition published in 2013 of which it

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
• addition of battery type;
• revision of Figure 3 (6.1.3.1);
---------------------- Page: 7 ----------------------
– 6 – IEC 61951-1:2017 © IEC 2017
• addition of “Optional pip” note to positive contact;
• changed leader line position from pip to flats of positive contact (B and G).
The text of this standard is based on the following documents:
FDIS Report on voting
21A/622/FDIS 21A/630/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of the IEC 61951 series can be found, under the general title Secondary cells

and batteries containing alkaline or other non-acid electrolytes – Secondary sealed cells and

batteries for portable applications, on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
IEC 61951-1:2017 © IEC 2017 – 7 –
SECONDARY CELLS AND BATTERIES CONTAINING
ALKALINE OR OTHER NON-ACID ELECTROLYTES –
SECONDARY SEALED CELLS AND BATTERIES
FOR PORTABLE APPLICATIONS –
Part 1: Nickel-cadmium
1 Scope

This part of IEC 61951 specifies marking, designation, dimensions, tests and requirements for

secondary sealed nickel-cadmium small prismatic, cylindrical and button cells and batteries,

suitable for use in any orientation, for portable applications.
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 60086-1, Primary batteries – Part 1: General
IEC 60086-2, Primary batteries – Part 2: Physical and electrical specifications

IEC 61959, Secondary cells and batteries containing alkaline or other non-acid electrolytes –

Mechanical tests for sealed portable secondary cells and batteries

IEC 62133-1, 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 1: Nickel systems
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-482 and the

following 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
3.1
nominal voltage

suitable approximate value of voltage used to designate or identify a cell or a battery

Note 1 to entry: The nominal voltage of a sealed nickel-cadmium rechargeable single cell: 1,2 V.

---------------------- Page: 9 ----------------------
– 8 – IEC 61951-1:2017 © IEC 2017

Note 2 to entry: The nominal voltage of a battery of n series connected cells is equal to n times the nominal

voltage of a single cell.

[SOURCE: IEC 60050-482:2004, 482-03-31, modified – Addition of Notes 1 and 2 to entry.]

3.2
rated capacity

capacity value of a cell or a battery determined under specified conditions and declared by

the manufacturer

Note 1 to entry: The rated capacity is the quantity of electricity C Ah (ampere-hours) declared by the

manufacturer which a single cell can deliver during a 5 h period when charging, storing and discharging under the

conditions specified in 7.3.2.

Note 2 to entry: The capacity of a battery is the quantity of electricity C Ah (ampere-hours) declared by the

manufacturer which a battery can deliver during a 5 h period, when charged, stored and discharged under the

conditions specified in 7.3.2.

[SOURCE: IEC 60050-482:2004, 482-03-15, modified – Addition of Notes 1 and 2 to entry.]

3.3
small prismatic cell

cell in the form of a rectangular parallelepiped whose width and thickness dimensions are not

more than 25 mm
3.4
cylindrical cell

cell of circular cross-section in which the overall height is equal to, or greater than, the overall

diameter
3.5
button cell

cell of a circular cross-section in which the overall height is less than the overall diameter

3.6
nickel-cadmium cell

cell containing a nickel hydroxide compound for the positive electrode, a cadmium compound

for the negative electrode, and potassium hydroxide or other alkaline solution as electrolyte

Note 1 to entry: Positive electrodes are isolated from negative electrodes by a separator.

3.7
nickel- cadmium battery

assembly of secondary cell(s) as a source of electrical energy characterized by its voltage,

size, terminal arrangement, capacity and rate capability
3.8
sealed cell

cell which remains closed and does not release either gas or liquid when operated within the

limits of charge and temperature specified by the manufacturer

Note 1 to entry: The cell is equipped with a safety device to prevent dangerously high internal pressure.

Note 2 to entry: The cell does not require addition to the electrolyte and is designed to operate during its life in its

original sealed state.

[SOURCE: IEC 60050-482:2004, 482-05-17, modified – The existing note has been developed

into Notes 1 and 2 to entry.]
---------------------- Page: 10 ----------------------
IEC 61951-1:2017 © IEC 2017 – 9 –
3.9
portable cell
cell designed mainly for use in an easily hand-carried battery
3.10
battery for portable applications
battery for use in device or appliance which is conveniently hand-carried
4 Parameter measurement tolerances

The overall accuracy of controlled or measured values, relative to the specified or actual

values, shall be within the following tolerances:
a) ±1 % for voltage;
b) ±1 % for current;
c) ±1 % for capacity;
d) ±2 °C for temperature;
e) ±0,1 % for time;
f) ±0,1 mm for dimensions;
g) ±5 % for humidity.

These tolerances comprise the combined accuracy of the measuring instruments, the

measurement techniques used and all other sources of error in the test procedure.

The details of the instrumentation used shall be provided in each report of results.

5 Cell and battery designation and marking
5.1 Cell and battery d
...

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