IEC 61982-4:2015

Secondary batteries (except lithium) for the propulsion of electric road vehicles - Part 4: Safety requirements of nickel-metal hydride cells and modules

IEC 61982-4:2015 specifies test procedures and acceptance criteria for safety performance of nickel-metal hydride (Ni-MH) secondary cells and modules used for the propulsion of electric vehicles (EV) including battery electric vehicles (BEV) and hybrid electric vehicles (HEV). This standard intends to secure the basic safety performance of the cell as used in a battery system under intended use and reasonably foreseeable misuse, during the normal operation of EV. The safety requirements of the cell in this standard are based on the premise that the cells and modules are properly used in a battery pack and system within the limit of voltage, current and temperature as specified by the cell manufacturer. The evaluation of the safety of batteries during transport and storage is not covered by this standard.

Accumulateurs (excepté lithium) pour la propulsion des véhicules routiers électriques - Partie 4: Exigences de sécurité pour les éléments et modules d'accumulateurs nickel métal-hydrure

L'IEC 61982-4:2015 spécifie les procédures d'essai et les critères d'acceptation pour les performances de sécurité des éléments et modules d accumulateurs nickel métal-hydrure (Ni-MH) utilisés pour la propulsion des véhicules électriques (EV), y compris les véhicules électriques à batterie (BEV) et les véhicules électriques hybrides (HEV). La présente norme entend encadrer les performances de sécurité fondamentale de l'élément tel qu'il est utilisé dans un système de batterie en utilisation prévue et en utilisation abusive raisonnablement prévisible, pendant le fonctionnement normal du véhicule électrique. Les exigences de sécurité de l'élément dans la présente norme sont basées sur l'hypothèse que les éléments et les modules sont correctement utilisés dans un système et un bloc de batterie dans les limites de tension, de courant et de température telles que spécifiées par le fabricant de l'élément. L'évaluation de la sécurité des batteries pendant le transport et le stockage n'est pas couverte par la présente norme.

General Information

• Status: Published
• Publication Date: 27-Oct-2015
• ICS: 29.220.20 - Acid secondary cells and batteries
• Technical Committee: TC 21 - Secondary cells and batteries
• Drafting Committee: JWG 69 Pb-Ni - TC 21/JWG 69 Pb-Ni
• Current Stage: PPUB - Publication issued
• Start Date: 28-Oct-2015
• Completion Date: 31-Jan-2016

Standards Content (Sample)

IEC 61982-4 ®
Edition 1.0 2015-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary batteries (except lithium) for the propulsion of electric road vehicles –
Part 4: Safety requirements of nickel-metal hydride cells and modules

Accumulateurs (excepté lithium) pour la propulsion des véhicules routiers
électriques –
Partie 4: Exigences de sécurité pour les éléments et modules d’accumulateurs
nickel métal-hydrure
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IEC 61982-4 ®
Edition 1.0 2015-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary batteries (except lithium) for the propulsion of electric road vehicles –

Part 4: Safety requirements of nickel-metal hydride cells and modules

Accumulateurs (excepté lithium) pour la propulsion des véhicules routiers

électriques –
Partie 4: Exigences de sécurité pour les éléments et modules d’accumulateurs

nickel métal-hydrure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-2973-6

– 2 – IEC 61982-4:2015 © IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General test requirements . 7
4.1 Accuracy of measuring instruments . 7
4.1.1 Electrical measuring instruments . 7
4.1.2 Tolerance . 8
4.2 General test conditions . 8
4.2.1 Test temperature . 8
4.2.2 Temperature measurements . 8
4.2.3 Dimension measurement . 9
5 Electrical measurement . 9
5.1 General charge conditions . 9
5.2 Capacity . 10
5.3 State of charge (SOC) adjustment. 10
6 Safety tests . 10
6.1 General . 10
6.2 Mechanical test . 10
6.2.1 Mechanical shock . 10
6.2.2 Crush . 11
6.2.3 Vibration . 12
6.3 Thermal test . 12
6.3.1 High temperature endurance. 12
6.3.2 Temperature cycling . 13
6.4 Electrical test . 13
6.4.1 External short circuit . 13
6.4.2 Overcharge . 14
6.4.3 Forced discharge . 14
Bibliography . 15

Figure 1 – Example of temperature measurement of cell . 8
Figure 2 – Examples of maximum dimension of cell . 9
Example A . 11
Example B . 11
Figure 3 – Example of crush test . 11

Table 1 – Frequency and acceleration . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY BATTERIES (EXCEPT LITHIUM)
FOR THE PROPULSION OF ELECTRIC ROAD VEHICLES –

Part 4: Safety requirements of nickel-metal hydride cells and modules

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61982-4 has been prepared by IEC technical committee 21:
Secondary cells and batteries.
The text of this standard is based on the following documents:
CDV Report on voting
21/852/CDV 21/866/RVC
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.

– 4 – IEC 61982-4:2015 © IEC 2015
A list of all parts in the IEC 61982 series, published under the general title Secondary
batteries (except lithium) for the propulsion of electric road vehicles, can be found 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.
INTRODUCTION
The electric road vehicles (EV) including hybrid electric vehicles (HEV) begin to diffuse in the
global market with backing from global concerns on CO reduction and clean energy, as well
as from relevant technology advancement and cost reduction. Nickel-metal hydride (Ni-MH)
batteries have advantages in cost and balanced performance, and have been used
extensively for EV application, especially for the propulsion of HEV.
This standard provides the safety test procedures and acceptance criteria of Ni-MH batteries
(cells and modules) for EV application in order to evaluate their basic safety performance. For
automobile application, it is important to note the designing diversity of battery packs and
systems, and specific requirements for cells corresponding to each of such designs. Based on
these facts, the purpose of this standard is to provide a basic level of safety test methodology
and criteria with general versatility, which serves a function in common primary testing of cells
or modules to be used in a variety of battery systems.
For specific requirements for the safety of cell differ depending on the system designs of
battery pack or vehicle, final pass-fail criteria of cell are to be based on the agreement
between the cell manufacturers and the customers.

– 6 – IEC 61982-4:2015 © IEC 2015
SECONDARY BATTERIES (EXCEPT LITHIUM)
FOR THE PROPULSION OF ELECTRIC ROAD VEHICLES –

Part 4: Safety requirements of nickel-metal hydride cells and modules

1 Scope
This Part of IEC 61982 specifies test procedures and acceptance criteria for safety
performance of nickel-metal hydride (Ni-MH) secondary cells and modules used for the
propulsion of electric vehicles (EV) including battery electric vehicles (BEV) and hybrid
electric vehicles (HEV).
This standard intends to secure the basic safety performance of the cell as used in a battery
system under intended use and reasonably foreseeable misuse, during the normal operation
of EV. The safety requirements of the cell in this standard are based on the premise that the
cells and modules are properly used in a battery pack and system within the limit of voltage,
current and temperature as specified by the cell manufacturer.
The evaluation of the safety of batteries during transport and storage is not covered by this
standard.
NOTE 1 In this standard, Ni-MH cells mean the sealed nickel-metal hydride cells: these are sealed cells that use
nickel hydroxide at the positive electrode, a hydrogen absorbing alloy at the negative electrode, and alkaline
aqueous solution such as potassium hydroxide as the electrolyte. Sealed-type cells are those that can maintain
their sealed condition and do not release gas or liquid when electrically charged and discharged within the
temperature range specified by the cell manufacturer. These cells are equipped with a gas release mechanism to
prevent explosion.
NOTE 2 In this standard, all the description on the cell are applicable to the module under the test.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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 61434, Secondary cells and batteries containing alkaline or other non-acid electrolytes –
Guide to designation of current in alkaline secondary cell and battery standards
3 Terms and definitions
For the purposes of this document, the terms and definitions and those given in
IEC 60050-482, as well as the following apply.
3.1
battery electric vehicle
BEV
electric vehicle with only a traction battery as power source for vehicle propulsion

3.2
explosion
failure that occurs when a cell container opens violently and major components are forcibly
expelled
3.3
fire
emission of flames from a cell
3.4
hybrid electric vehicle
HEV
vehicle with both a rechargeable energy storage system and a fuelled power source for
propulsion
3.5
module
group of cells connected together in a series and/or parallel configuration with or without
protective devices, e.g. fuse or positive temperature coefficient (PTC), not yet fitted with its
final housing, terminal arrangement and electronic control device
3.6
rated capacity
capacity value of a cell or battery determined under specified conditions and declared by the
manufacturer
Note 1 to entry: The rated capacity Cn of a cell or battery is declared by the cell manufacturer.
[SOURCE: IEC 60050-482:2004, 482-03-15, modified – Addition of Note to entry.]
3.7
ambient temperature
temperature of 25 °C ± 2 K
3.8
state of charge
SOC
available capacity in a battery expressed as a percentage of the rated capacity
4 General test requirements
4.1 Accuracy of measuring instruments
4.1.1 Electrical measuring instruments
4.1.1.1 Range of measuring devices
The instruments used shall enable the values of voltage and current to be correctly measured.
The range of these instruments and measuring methods shall be chosen so as to ensure the
accuracy specified for each test. For analogue instruments, this implies that the readings shall
be taken in the last third of the graduated scale. Any other measuring instruments may be
used provided they give an equivalent accuracy.
4.1.1.2 Voltage measurement
The instruments used for voltage measurement shall be voltmeters of an accuracy class equal
to 0,5 or better. The resistance of the voltmeters used shall be at least 1 000 Ω/V (see
IEC 60051 series).
– 8 – IEC 61982-4:2015 © IEC 2015
4.1.1.3 Current measurement
The instruments used for current measurement shall be ammeters of an accuracy class equal
to 0,5 or better. The entire assembly of ammeter, shunt and leads shall be of an accuracy
class of 0,5 or better (see IEC 60051 series or refer to IEC 60359).
4.1.2 Tolerance
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 K for temperature;
d) ± 0,1 % for time;
e) ± 0,1 % for dimensions.
These tolerances comprise the combined accuracy of the measuring instruments, the
measurement technique used, and all other sources of error in the test procedure.
4.2 General test conditions
4.2.1 Test temperature
If not otherwise defined, before each test, the cell shall be stabilised at the ambient
temperature for a period between 1 h and 4 h.
Unless otherwise stated in this standard, the cell shall be tested at the ambient temperature.
4.2.2 Temperature measurements
The cell temperature shall be measured by use of a surface temperature measuring device
capable of an equivalent scale definition and accuracy of calibration as specified in 4.1.2. The
temperature should be measured at a location which most closely reflects the cell temperature.
The temperature may be measured at additional appropriate locations, if necessary.
The examples for temperature measurement are shown in Figure 1. The instructions for
temperature measurement specified by the cell manufacturer shall be followed.
Prismatic cell Cylindrical cell
Temperature measuring device
Cell Cell Cell
Insulating material
IEC
Figure 1 – Example of temperature measurement of cell

4.2.3 Dimension measurement
The maximum dimension of the total width, thickness or diameter, and length of a cell shall be
measured up to three significant figures in accordance with the tolerances in 4.1.2.
The examples of maximum dimension are shown in Figures 2a) to 2d).
IEC IEC
Figure 2a) – Cylindrical cell (type a) Figure 2b) – Cylindrical cell (type b)
A B
A B
IEC IEC
Figure 2c) – Prismatic cell (type a) Figure 2d) – Prismatic cell (type b)
Key
A total width
B total thickness
C diameter
D total length (including terminals)
E total length (excluding terminals)
Figure 2 – Examples of maximum dimension of cell
5 Electrical measurement
5.1 General charge conditions
Unless otherwise stated in this standard, prior to electrical measurement, the cell shall be
charged as follows.
Step 1 Prior to charging, the cell shall be discharged at the ambient temperature at a
A down to a final voltage specified by the cell
constant current of 1/3 I
t
manufacturer.
Step 2 Then, the cell shall be charged, at the ambient temperature, according to the
charging method declared by the cell manufacturer.
E C
D
E
D
E C
D
D, E
– 10 – IEC 61982-4:2015 © IEC 2015
5.2 Capacity
Before the SOC adjustment in 5.3, the capacity of test cell shall be confirmed to be the rated
value in accordance with the following steps.
Step 1 The cell shall be charged in accordance with 5.1. After the charge, the cell
temperature shall be stabilized in accordance with 4.2.1.
Step 2 The cell shall be discharged at 1 I A down to 0,9 V at the ambient temperature.
t
The upper limit of the discharge current shall be 200 A. When testing modules, the
final voltage is the product of the final voltage of a cell and the number of cells
connected in series in the module.
The method of designation of test current I A is defined in IEC 61434.
t
Step 3 Measure the discharge duration until the specified final voltage is reached, and
calculate the capacity of the cell, expressed in Ah to three significant figures.
5.3 State of charge (SOC) adjustment
The test cells shall be charged as specified below. The SOC adjustment is the procedure to
be followed for preparing cells to the various SOCs for the tests.
Step 1 The cell shall be charged in accordance with 5.1.
Step 2 The cell shall be left at rest at ambient temperature in accordance with 4.2.1.
Step 3 The cell shall be discharged at a constant current of 1/3 I (A) at ambient
t
temperature for (100 – n)/100 × 3 h, where n is SOC (% Cn Ah ) to be adjusted for
each test.
6 Safety tests
6.1 General
The safety tests in this clause shall be performed on a cell or module that is not more than six
months old under the conditions specified by the cell manufacturer.
The number of cells under each test can be determined according to the agreement between
the cell manufacturer and the customer.
For all the tests specified in this clause, the test installation shall be reported including the
securement and wiring of the cell or module.
NOTE If necessary, to prevent deformation, the cell can be maintained during the test in a manner that does not
violate the test purpose.
6.2 Mechanical test
6.2.1 Mechanical shock
6.2.1.1 General
This test is to verify the safety performance of the cell under inertial loads which may occur
during a vehicle crash.
6.2.1.2 Test
The test shall be performed as follows.
Step 1 Adjust the SOC of the cell to 100 % Cn Ah for BEV application and 80 % Cn Ah for
HEV application in accordance with 5.3.
Step 2 The cell shall be secured to the testing machine by means of a rigid mount which
will support all mounting surfaces of the cell.

Step 3 Apply a half-sine shock of peak acceleration of 50 g and pulse duration of 11 ms
n
to the cell. The cell shall be subjected to three shocks in the positive direction
followed by three shocks in the negative direction of each of three mutually
perpendicular mounting positions of the cell for a total of 18 shocks.
6.2.1.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.
6.2.2 Crush
6.2.2.1 General
This test is performed to characterize the cell response to external load forces that may cause
deformation.
6.2.2.2 Test
The test shall be performed as follows.
Step 1 Adjust the SOC of the cell to 100 % Cn Ah for BEV application and 80 % Cn Ah for
HEV application in accordance with 5.3.
Step 2 The cell shall be placed on an insulated solid flat surface and be crushed with a
crushing tool in the shape of round or semi-circular bar, or in the shape of a
sphere or hemisphere with a 150 mm diameter. It is recommended to use the
round bar to crush a cylindrical cell and the sphere for a prismatic cell (see Figure
3). The force for the crushing shall be applied in direction nearly perpendicular to
the layered face of the positive and negative electrodes inside the cell. The force
shall be applied to the approximate centre of the cell as shown in Figure 3. The
crush speed shall be less than or equal to 6 mm/min.
Step 3 The force shall be released when an abrupt voltage drop of one-third of the
original cell voltage occurs, or a deformation of 15 % or more of initial cell
dimension occurs, or the force of 1 000 times the weight of the cell is applied,
whichever comes first. The cells shall be under observation for 24 h or until the
cell temperature declines by 80 % of the maximum temperature rise, whichever is
the sooner.
Crushing tool:
Crushing tool:
Hemisphere
Semicircular bar
Prismatic cell
Cylindrical cell
IEC IEC
: Crushing direction
Example A Example B
Figure 3 – Example of crush test
6.2.2.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.

– 12 – IEC 61982-4:2015 © IEC 2015
6.2.3 Vibration
6.2.3.1 General
This test is to verify the safety performance of the cell under a vibration environment which
the cell will likely experience during the normal operation of the vehicle.
6.2.3.2 Test
The test shall be performed as follows.
Step 1 Adjust the SOC of the cell to 100 % for BEV application and 80 % for HEV
application in accordance with 5.3.
Step 2 The cell shall be subjected to a vibration having a sinusoidal waveform with a
logarithmic sweep between 7 Hz and 50 Hz and back to 7 Hz traversed in 15 min.
This cycle shall be repeated 12 times for a total of 3 h in the vertical direction of
the mounting orientation of the cell as specified by the cell manufacturer.
The correlation between frequency and acceleration shall be as shown in Table 1:
Table 1 – Frequency and acceleration
Frequency Acceleration
Hz m/s
7 to 18 10
18 to 30 gradually reduced from 10 to 2
30 to 50 2
NOTE 1 A higher acceleration level as well as a higher maximum frequency can be used at the request of the
cell manufacturer.
NOTE 2 A vibration test profile determined by the vehicle manufacturer can be used as a substitute for the
frequency – acceleration correlation of Table 1.

Step 3 The test shall end with an observation period of 1 h at the ambient temperature.
6.2.3.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.
6.3 Thermal test
6.3.1 High temperature endurance
6.3.1.1 General
This test is performed to simulate a high-temperature environment that the cell will experience
during the normal operation of the vehicle, and to verify the safety performance of the cell
under such conditions.
6.3.1.2 Test
The test shall be performed as follows.
Step 1 Adjust the SOC of the cell to 100 % Cn Ah for BEV application and 80 % Cn Ah for
HEV application in accordance with 5.3.
Step 2 The cell shall be placed in a gravity or circulating air convection oven. The oven
temperature shall be 60 °C ± 2 K. The cell shall remain at this temperature for 2 h.
Then, the cell shall be placed at ambient temperature and be observed for 1 h in
the oven.
NOTE If necessary, to prevent deformation, the cell can be maintained during the test in a manner that does not
violate the test purpose.
6.3.1.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.
6.3.2 Temperature cycling
6.3.2.1 General
This test is performed to simulate the low and high temperature environment alternately which
causes expansion and contraction of cell components, and to verify the safety performance of
the cell under such conditions.
6.3.2.2 Test
The test shall be performed as follows.
Step 1 Adjust the SOC of the cell to 100 % Cn Ah for BEV application and 80 % Cn Ah for
HEV application in accordance with 5.3.
Step 2 All protection devices, which would affect the function of the cell and which are
relevant to the outcome of the test shall be operational.
Step 3 The cell shall be stored for at least 6 h at a test temperature equal to
60 °C ± 2 K or higher if requested by the cell manufacturer, followed by storage
for at least 6 h at a test temperature equal to -40 °C ± 2 K or lower if requested by
the cell manufacturer. The maximum time interval between the test temperature
extremes shall be 30 min. This procedure shall be repeated until a minimum of 5
total cycles are completed, after which the cell shall be stored for 24 h at ambient
temperature.
Step 4 The test shall end with an observation period of 1 h at the ambient temperature.
6.3.2.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.
6.4 Electrical test
6.4.1 External short circuit
6.4.1.1 General
This test is performed to verify the safety performance of the cell for external short circuit.
6.4.1.2 Test
The test shall be performed as follows.
Step 1 The cell shall be fully charged in accordance with 5.1.
Step 2 The cell shall be short-circuited by connecting the positive and negative terminals
with an external resistance for 10 min. A total external resistance per cell shall be
equal to or less than 5 mΩ as agreed between the customer and the cell
manufacturer.
Step 3 The cell shall be observed for 1 h after the test at ambient temperature.
6.4.1.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.

– 14 – IEC 61982-4:2015 © IEC 2015
6.4.2 Overcharge
6.4.2.1 General
This test is performed to verify the safety performance of the cell for overcharge.
6.4.2.2 Test
The test shall be performed as follows.
Step 1 Adjust the SOC of the cell to 100 % Cn Ah in accordance with 5.3.
Step 2 Continue charging the cell beyond the 100 % Cn Ah SOC with the charging current
specified by the cell manufacturer at ambient temperature using a power supply
sufficient to provide the constant charging current.
When the voltage of the cell reaches 3 V, continue the charge to 200 % of the rated capacity
while maintaining the voltage at 3 V.
Step 3 The cell shall be observed for 1 h after the test at ambient temperature.
6.4.2.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.
6.4.3 Forced discharge
6.4.3.1 General
This test is performed to verify the safety performance of the cell for over discharge.
6.4.3.2 Test
Discharge a fully discharged cell at 1 I A for 90 min. When the voltage of the cell
t
reaches -3 V before 90 min, continue the discharge to a 150 % of the rated capacity while
maintaining the voltage of –3 V.
6.4.3.3 Acceptance criteria
During the test, the cell shall exhibit no evidence of fire or explosion.

Bibliography
IEC 60051 (all parts), Direct acting indicating analogue electrical measuring instruments and
their accessories
IEC 60359, Electrical and electronic measurement equipment – Expression of performance
IEC 61982, Secondary batteries (except lithium) for the propulsion of electric road vehicles –
Performance and endurance tests
IEC 62660-2, Secondary lithium-ion cells for the propulsion of electric road vehicles – Part 2:
Reliability and abuse testing
_____________
– 16 – IEC 61982-4:2015 © IEC 2015
SOMMAIRE
AVANT-PROPOS . 17
INTRODUCTION . 19
1 Domaine d’application . 20
2 Références normatives . 20
3 Termes et définitions . 20
4 Exigences générales relatives aux essais . 22
4.1 Précision des instruments de mesure . 22
4.1.1 Instruments de mesure électriques . 22
4.1.2 Tolérance . 22
4.2 Conditions générales d’essais . 22
4.2.1 Température d’essai . 22
4.2.2 Mesures de la température . 22
4.2.3 Mesure des dimensions . 23
5 Mesure électrique . 24
5.1 Conditions générales de charge . 24
5.2 Capacité . 24
5.3 Ajustement de l’état de charge . 25
6 Essais de sécurité . 25
6.1 Généralités . 25
6.2 Essai mécanique . 25
6.2.1 Choc mécanique . 25
6.2.2 Écrasement . 26
6.2.3 Vibrations . 27
6.3 Essai thermique . 27
6.3.1 Endurance à température élevée . 27
6.3.2 Cycles de températures . 28
6.4 Essai électrique . 28
6.4.1 Court-circuit externe . 28
6.4.2 Surcharge . 29
6.4.3 Décharge forcée . 29
Bibliographie . 30

Figure 1 – Exemple de mesure de la température d’un élément . 23
Figure 2 – Exemples de dimension maximale d’élément . 24
Figure 3 – Exemple d'essai d'écrasement . 26

Tableau 1 – Fréquence et accélération . 27

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
ACCUMULATEURS (EXCEPTÉ LITHIUM) POUR
LA PROPULSION DES VÉHICULES ROUTIERS ÉLECTRIQUES –

Partie 4: Exigences de sécurité pour les éléments et modules
d’accumulateurs nickel métal-hydrure

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation
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travaux. L’IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des
conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de l’IEC concernant les questions techniques représentent, dans la mesure
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référencées est obligatoire pour une application correcte d
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