Lead-acid batteries for propulsion and operation of lightweight vehicles and equipment - General requirements and methods of test

This document is applicable to lead-acid batteries powering electric two-wheelers (mopeds)
and three-wheelers (e-rickshaws and delivery vehicles), and also to golf cars and similar light
utility and multi-passenger vehicles.
a) operate them most often in an environment with many bystanders who are unaware of the
possible risks involved. The batteries have thus to be eminently reliable, consumer friendly
and minimize risks of fire, explosions, electrical shocks and chemical burns.
These batteries are submitted to frequent and deep discharges with electrical power delivered
to the propulsion system in short surges of high current when accelerating, followed by lower
current levels when at cruising speed. The subsequent charge of the battery can also occur in
areas accessible to the public.
The document specifies methods of tests tailored to batteries destined for the
above-referenced types of vehicles so as to ensure satisfactory and safe battery performance
in the intended application.
This document does not apply for example to lead acid cells and batteries used for:
• vehicle engine starting applications (IEC 60095 series);
• traction applications (IEC 60254 series);
• stationary applications (IEC 60896 series);
• general purpose applications (IEC 61056 series); or to
• motorized wheelchairs and similar personal assist vehicles.

Bleibatterien für den Antrieb von Leichtkraftfahrzeugen - Allgemeine Anforderungen und Prüfverfahren

Batteries d'accumulateurs au plomb pour la propulsion et le fonctionnement de véhicules et équipements légers - Prescriptions générales et méthodes d'essai

L'IEC 63193:2020 applique aux batteries au plomb qui alimentent les véhicules à deux roues (cyclomoteurs) et à trois roues (cyclopousses électriques et véhicules de livraison) ainsi que les voiturettes de golf et véhicules industriels et multipassagers légers similaires. Le document spécifie les méthodes d'essai adaptées aux batteries destinées aux types de véhicules mentionnés ci-dessus. Il s'agit d'assurer les performances satisfaisantes et sûres de la batterie dans l'application prévue. Le présent document ne s'applique pas, par exemple, aux éléments et batteries au plomb utilisés pour: le démarrage du moteur d'un véhicule (série IEC 60095); la traction (série IEC 60254); les applications stationnaires (série IEC 60896); les applications générales (série IEC 61056); ou les fauteuils roulants motorisés et véhicules d'aide à la personne similaires.

Svinčeno-kislinske baterije za pogon in obratovanje lahkih vozil in opreme - Splošne zahteve in preskusne metode

General Information

Status
Published
Publication Date
21-Jan-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Jan-2021
Due Date
20-Mar-2021
Completion Date
22-Jan-2021

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SLOVENSKI STANDARD
SIST EN IEC 63193:2021
01-februar-2021
Svinčeno-kislinske baterije za pogon in obratovanje lahkih vozil in opreme -
Splošne zahteve in preskusne metode

Lead-acid batteries for propulsion and operation of lightweight vehicles and equipment -

General requirements and methods of test

Batteries d'accumulateurs au plomb pour la propulsion et le fonctionnement de véhicules

et équipements légers - Prescriptions générales et méthodes d'essai
Ta slovenski standard je istoveten z: EN IEC 63193:2021
ICS:
29.220.20 Kislinski sekundarni členi in Acid secondary cells and
baterije batteries
SIST EN IEC 63193:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 63193:2021
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SIST EN IEC 63193:2021
EUROPEAN STANDARD EN IEC 63193
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2021
ICS 29.220.20
English Version
Lead-acid batteries for propulsion power of lightweight vehicles -
General requirements and methods of test
(IEC 63193:2020)

Batteries au plomb pour la puissance de propulsion des Bleibatterien für den Antrieb von Leichtkraftfahrzeugen -

véhicules légers - Exigences générales et méthodes d'essai Allgemeine Anforderungen und Prüfverfahren

(IEC 63193:2020) (IEC 63193:2020)

This European Standard was approved by CENELEC on 2020-12-23. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 63193:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 63193:2021
EN IEC 63193:2021 (E)
European foreword

The text of document 21/1056/FDIS, future edition 1 of IEC 63193, prepared by IEC/TC 21

"Secondary cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 63193:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-09-23

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-12-23

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

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

Endorsement notice

The text of the International Standard IEC 63193:2020 was approved by CENELEC as a European

Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN IEC 63193:2021
EN IEC 63193:2021 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),

the relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 60695-11-4 2011 Fire hazard testing - Part 11-4: Test flames - EN 60695-11-4 2011

50 W flame - Apparatus and confirmational
test method

IEC 60695-11-10 2013 Fire hazard testing - Part 11-10: Test flames EN 60695-11-10 2013

- 50 W horizontal and vertical flame test
methods
IEC/TR 61430 1997 Secondary cells and batteries - Test - -
methods for checking the performance of
devices designed for reducing explosion
hazards - Lead-acid starter batteries
IEC 62902 2019 Secondary cells and batteries - Marking EN IEC 62902 2019
symbols for identification of their chemistry
ISO 1043-1 2011 Plastics - Symbols and abbreviated terms – EN ISO 1043-1 2011
Part 1: Basic polymers and their special
characteristics
ISO 3864-1 2011 Graphical symbols - Safety colours and - -
safety signs - Part 1: Design principles for
safety signs and safety markings
ISO 3864-3 2012 Graphical symbols - Safety colours and - -
safety signs - Part 3: Design principles for
graphical symbols for use in safety signs
ISO 7000 - Graphical symbols for use on equipment - - -
Registered symbols
ISO 7010 - Graphical symbols - Safety colours and - -
safety signs - Registered safety signs
ISO 8608 2016 Mechanical vibration - Road surface profiles - -
- Reporting of measured data
---------------------- Page: 5 ----------------------
SIST EN IEC 63193:2021
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SIST EN IEC 63193:2021
IEC 63193
Edition 1.0 2020-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Lead-acid batteries for propulsion power of lightweight vehicles – General
requirements and methods of test
Batteries au plomb pour la puissance de propulsion des véhicules légers –
Exigences générales et méthodes d'essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-8717-0

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: 7 ----------------------
SIST EN IEC 63193:2021
– 2 – IEC 63193:2020 © IEC 2020
CONTENTS

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

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

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

4 Test set-up .................................................................................................................... 13

4.1 Accuracy of the measuring instruments ................................................................. 13

4.2 General test features and rules ............................................................................. 13

5 Test methods for batteries destined for electric two- and three-wheelers ....................... 15

5.1 General ................................................................................................................. 15

5.2 Capacity determination with the 2 h rate current at 25 °C ...................................... 16

5.3 Capacity determination with the 3 h rate current at 25 °C ...................................... 17

5.4 High-rate constant current capacity at 25 °C ......................................................... 18

5.5 Capacity at a battery temperature of −18 °C ......................................................... 19

5.6 Capacity recovery at a battery temperature of −10 °C ........................................... 20

5.7 Capacity recovery at a battery temperature of 25 °C with a time-limited fast

charge .................................................................................................................. 21

5.8 Cycle life with repetitive discharges at 25 °C to 90 % DoD of the rated

capacity ................................................................................................................ 22

5.9 Dynamic driving range at 25 °C ............................................................................. 24

5.10 Dynamic driving range at 5 °C ............................................................................... 25

5.11 Charge retention during storage at 40 °C .............................................................. 26

5.12 Cycle life with repetitive discharges at 40 °C to 50 % DoD of rated capacity ......... 27

5.13 Vibration resistance .............................................................................................. 28

5.14 Protection against internal ignition from external spark sources ............................ 30

5.15 Flammability rating of materials ............................................................................ 31

5.16 Content and durability of required marking ............................................................ 32

5.17 Material identification ............................................................................................ 35

6 Test methods for batteries destined for golf car and similar utility- and multi-

passenger vehicles ........................................................................................................ 36

6.1 General ................................................................................................................. 36

6.2 Capacity determination with the 5 h rate current at 30 °C ...................................... 36

6.3 Running time in minutes with a 56 A or 75 A current at 30 °C ............................... 38

6.4 Running time in minutes with a 56 A or 75 A current at 5 °C ................................. 39

6.5 Capacity recovery at a battery temperature of 30 °C and time-limited fast

charge .................................................................................................................. 40

6.6 Cycle life with repetitive discharges at 30 °C with the 5 h rate current to

1,75 V per cell ...................................................................................................... 41

6.7 Pulsed-power cycle life at 40 °C............................................................................ 42

6.8 Determination of electrolyte level maintenance interval – Flooded types only ........ 43

6.9 Charge retention during storage at 40 °C .............................................................. 44

6.10 Vibration resistance .............................................................................................. 45

6.11 Protection against internal ignition from external spark sources ............................ 47

6.12 Flammability rating of materials ............................................................................ 48

6.13 Content and durability of required marking ............................................................ 49

6.14 Material identification ............................................................................................ 52

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SIST EN IEC 63193:2021
IEC 63193:2020 © IEC 2020 – 3 –

Annex A (informative) Guidance on expected test results ..................................................... 53

A.1 General ................................................................................................................. 53

A.2 Expected outcomes for tests 5.2 to 5.17 with batteries destined for electric

two- and three-wheelers ........................................................................................ 53

A.3 Expected outcomes for tests in 6.2 to 6.14 with batteries destined for golf

car and similar utility- and multi-passenger vehicles .............................................. 55

Figure 1 – Examples of vehicles covered by this document ..................................................... 7

Figure 2 – Example of orientation of the monoblocs on the vibration table in relation to

their specified orientation in service ...................................................................................... 29

Figure 3 – Example of orientation of the monoblocs on the vibration table in relation to

their specified orientation in service ...................................................................................... 46

Table 1 – Listing of the number of monoblocs to be tested for Clause 5 applications ............ 15

Table 2 – Capacity at 25 °C determined with the 2 h rate discharge current I ...................... 17

Table 3 – Capacity at 25 °C determined with the 3 h rate discharge current I ...................... 18

Table 4 – Capacity at 25 °C determined with the high-rate discharge current 3,6 I .............. 19

Table 5 – Capacity at −18 °C determined with the 2 h rate discharge current I .................... 20

Table 6 – Capacity recovery after discharge and charge at −10 °C ....................................... 21

Table 7 – Capacity recovery at 25 °C with a time-limited fast charge .................................... 22

Table 8 – Cycle life with repetitive discharges to 90 % of the rated C capacity at 25 °C ...... 23

Table 9 – Cycle life with repetitive discharges to 90 % of the rated C capacity at 25 °C ...... 24

Table 10 – Dynamic discharge sequence .............................................................................. 24

Table 11 – Achieved discharge sequences at 25 °C .............................................................. 25

Table 12 – Dynamic discharge sequence .............................................................................. 25

Table 13 – Achieved discharge sequences at 5 °C ................................................................ 26

Table 14 – Capacity retained after 30 days of storage at 40 °C ............................................. 27

Table 15 – Cycle life with repetitive discharges to 50 % DoD of rated C capacity at

40 °C .................................................................................................................................... 28

Table 16 – Cycle life with repetitive discharges to 50 % DoD of rated C capacity at

40 °C .................................................................................................................................... 28

Table 17 – Capacity retained after 60 min vibration and subsequent 24 h OC stand ............. 30

Table 18 – Battery status after spark test .............................................................................. 31

Table 19 – Burning classification achieved when tested in accordance with

IEC 60695-11-10:2013 .......................................................................................................... 32

Table 20 – Content and durability of the required marking .................................................... 33

Table 21 – Information to be present on the monobloc .......................................................... 34

Table 22 – Material identification and durability of the required marking................................ 35

Table 23 – Listing of the number of monoblocs to be tested for Clause 6 applications .......... 36

Table 24 – Capacity at 30 °C determined with the 5 h rate discharge current I .................... 37

Table 25 – Running time determined with the 56 A or 75 A discharge current at 30 °C.......... 38

Table 26 – Running time determined with the 56 A or 75 A discharge current at 5 °C ........... 39

Table 27 – Capacity recovery at 30 °C with a time-limited fast charge................................... 41

Table 28 – Cycle life with repetitive discharges at 30 °C to 1,75 V per cell with the I

current .................................................................................................................................. 42

Table 29 – Pulsed power discharge and charge sequence – Flooded types .......................... 42

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SIST EN IEC 63193:2021
– 4 – IEC 63193:2020 © IEC 2020

Table 30 – Pulsed power discharge and charge sequence – VRLA types .............................. 42

Table 31 – Achieved discharge and charge cycle sequences at 40 °C .................................. 42

Table 32 – Discharge and charge sequence for the determination of the electrolyte

level maintenance interval .................................................................................................... 43

Table 33 – Achieved discharge and charge sequences at 40 °C until the manufacturer

specified minimum electrolyte level mark is reached ............................................................. 44

Table 34 – Capacity retained after 30 days of storage at 40 °C ............................................. 45

Table 35 – Capacity retained after 60 min vibration and subsequent 24 h OC stand ............. 46

Table 36 – Battery status after spark test .............................................................................. 48

Table 37 – Burning classification achieved when tested in accordance with

IEC 60696‑11‑10:2013 .......................................................................................................... 49

Table 38 – Content and durability of the required marking .................................................... 50

Table 39 – Information to be present on the monobloc .......................................................... 51

Table 40 – Material identification and durability of the required marking................................ 52

---------------------- Page: 10 ----------------------
SIST EN IEC 63193:2021
IEC 63193:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LEAD-ACID BATTERIES FOR PROPULSION
POWER OF LIGHTWEIGHT VEHICLES –
GENERAL REQUIREMENTS AND METHODS OF TEST
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

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC

Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

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 63193 has been prepared by IEC technical committee 21:

Secondary cells and batteries.
The text of this International Standard is based on the following documents:
FDIS Report on voting
21/1056/FDIS 21/1066/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

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

---------------------- Page: 11 ----------------------
SIST EN IEC 63193:2021
– 6 – IEC 63193:2020 © IEC 2020

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

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

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 12 ----------------------
SIST EN IEC 63193:2021
IEC 63193:2020 © IEC 2020 – 7 –
LEAD-ACID BATTERIES FOR PROPULSION
POWER OF LIGHTWEIGHT VEHICLES –
GENERAL REQUIREMENTS AND METHODS OF TEST
1 Scope

This document is applicable to lead-acid batteries powering electric two-wheelers (mopeds)

and three-wheelers (e-rickshaws and delivery vehicles), and also to golf cars and similar light

utility and multi-passenger vehicles.
a) Electric two- and three-wheelers
b) Electric golf car and light utility and multi-passenger vehicles
Figure 1 – Examples of vehicles covered by this document

Persons with a low level of technical skills as regards these vehicles and associated batteries,

operate them most often in an environment with many bystanders who are unaware of the

possible risks involved. The batteries have thus to be eminently reliable, consumer friendly

and minimize risks of fire, explosions, electrical shocks and chemical burns.

These batteries are submitted to frequent and deep discharges with electrical power delivered

to the propulsion system in short surges of high current when accelerating, followed by lower

current levels when at cruising speed. The subsequent charge of the battery can also occur in

areas accessible to the public.
The document specifies methods of tests tailored to batteries destined for the

above-referenced types of vehicles so as to ensure satisfactory and safe battery performance

in the intended application.

This document does not apply for example to lead acid cells and batteries used for:

• vehicle engine starting applications (IEC 60095 series);
• traction applications (IEC 60254 series);
---------------------- Page: 13 ----------------------
SIST EN IEC 63193:2021
– 8 – IEC 63193:2020 © IEC 2020
• stationary applications (IEC 60896 series);
• general purpose applications (IEC 61056 series); or to
• motorized wheelchairs and similar personal assist vehicles.
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 60695-11-4:2011, Fire hazard testing – Part 11-4: Test flames – 50 W flame – Apparatus

and confirmational test method

IEC 60695-11-10:2013, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and

vertical flame test methods
IEC TR 61430:1997, Secondary cells and batteries – Test methods for checking the

performance of devices designed for reducing explosion hazards – Lead-acid starter batteries

IEC 62902:2019, Secondary cells and batteries – Marking symbols for identification of their

chemistry

ISO 1043-1:2011, Plastics – Symbols and abbreviated terms – Part 1: Basic polymers and

their special characteristics

ISO 3864-1:2011, Graphical symbols – Safety colours and safety signs – Part 1: Design

principles for safety signs and safety markings

ISO 3864-3:2012, Graphical symbols – Safety colours and safety signs – Part 3: Design

principles for graphical symbols for use in safety signs

ISO 7000, Graphical symbols for use on equipment – Registered symbols (available at

http://www.graphical-symbols.info/equipment)

ISO 7010, Graphical symbols – Safety colours and safety signs – Registered safety signs

(available at https://www.iso.org/obp)

ISO 8608:2016, Mechanical vibration – Road surface profiles – Reporting of measured data

Directive 2012/19/EU of the European Parliament and of the Council of 4 July 2012 on waste

electrical and electronic equipment (WEEE)
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
---------------------- Page: 14 ----------------------
SIST EN IEC 63193:2021
IEC 63193:2020 © IEC 2020 – 9 –
3.1
acceptance test

contractual test to prove to the customer that the battery meets certain

conditions of its specification

Note 1 to entry: Such a test consists generally in a capacity determination carried out at the manufacturer's

premises prior to shipping and in the presence of the customer.

Note 2 to entry: Such a test could be also be combined with the commissioning test.

[SOURCE: IEC 60050-151:2001, 151-16-23, modified – The second preferred term "hand-over

test" has been omitted, "item" has been replaced with "battery" in the definition, and the

domain and notes to entry have been added.]
3.2
accuracy

quality which characterizes the ability of a measuring instrument

to provide an indicated value close to a true value of the measurand
Note 1 to entry: This term is used in the "true value" approach.

Note 2 to entry: Accuracy is all the better when the indicated value is closer to the corresponding true value.

[SOURCE: IEC 60050-311:2001, 311-06-08]
3.3
ambient temperature
average temperature of air or another medium in the vicinity of the battery

Note 1 to entry: During the measurement of the ambient temperature the measuring instrument/probe should be

shielded from draughts and radiant heating.
[SOURCE: IEC 60050-826:2001, 826-10-03, modified – The word "equipment" has been
replaced with "battery" in the definition.]
3.4
running time
autonomy time

extent of time over which the battery can support independently the electrical

load by providing all the load's required power

Note 1 to entry: This time is also called back-up or discharge duration and varies in function of battery age, load

size, state of charge and temperature.
3.5
capacity

electric charge which a cell or battery can deliver under specified

discharge conditions

Note 1 to entry: The SI unit for electric charge, or quantity of electricity, is the coulomb (1 C = 1 A·s) but in

practice, capacity is usually expressed in ampere hours (Ah).
[SOURCE: IEC 60050-482:2004, 482-03-14]
3.6
actual capacity

capacity value determined experimentally at a defined instant of time

with a discharge at a specified rate to a specified end-voltage and at a specified temperature

Note 1 to entry: Each actual capacity determination may yield a capacity value which may differ from the

preceding one.
----------------------
...

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