SIST EN 61056-1:2013

General purpose lead acid batteries (valve regulated types) - Part 1: General requirements, functional characteristics - Methods of test

This Part of IEC 61056 specifies the general requirements, functional characteristics and methods of test for all general purpose lead-acid cells and batteries of the valve-regulated type : - for either cyclic or float charge application; - in portable equipment, for instance, incorporated in tools, toys, or in static emergency, or uninterruptible power supply and general power supplies. The cells of this kind of lead-acid battery may either have flat-plate electrodes in prismatic containers or have spirally wound pairs of electrodes in cylindrical containers. The sulphuric acid in these cells is immobilized between the electrodes eiThis part of IEC 61056 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), or - stationary applications (IEC 60896 series). Conformance to this standard requires that statements and claims of basic performance data by the manufacturer correspond to these test procedures. The tests may also be used for type qualification.ther by absorption in a microporous structure or in a gelled form.

Bleibatterien für allgemeine Anwendungen (verschlossen) - Teil 1: Allgemeine Anforderungen, Eigenschaften - Prüfverfahren

Batteries d'accumulateurs au plomb-acide pour usage général (types à soupapes) - Partie 1: Prescriptions générales et caractéristiques fonctionnelles - Méthodes d'essai

La CEI 61056-1:2012 spécifie les exigences générales, les caractéristiques fonctionnelles, ainsi que les méthodes d'essais pour tous les éléments et batteries d'accumulateurs au plomb-acide pour usage général de types à soupapes:   - dans le cadre d'applications soit cycliques, soit à charge flottante;  - inclus dans des équipements portatifs, par exemple, incorporés dans des outils, jouets, ou dans des sources centrales pour éclairage de sécurité ou des alimentations de secours et générales. Cette troisième édition annule et remplace la deuxième édition de la CEI 61056-1 publiée en 2002. Elle constitue une révision technique.  Les principales modifications consistent en l'ajout de nouvelles désignations de batteries et en la mise à jour des exigences, comme celles concernant le marquage.

Svinčeve kislinske baterije (tipi z ventilsko regulacijo) - 1. del: Splošne zahteve, funkcijske karakteristike - Metode preskušanja

Ta del standarda IEC 61056 določa splošne zahteve, funkcijske karakteristike in metode preskušanja za vse svinčeve kislinske baterije tipa z ventilsko regulacijo: – za uporabo s cikličnim ali krožnim polnjenjem; – pri prenosni opremi, na primer vključene v orodja, igrače, ali v statičnih izrednih razmerah ali neprekinjenih napajalnikih in splošnih napajalnikih. Celice te vrste v svinčevi kislinski bateriji imajo lahko elektrode na ploščati ploščici v prizmatičnih shranjevalnikih ali imajo spiralno zavite pare elektrod v cilindričnih shranjevalnikih. Žveplova kislina je v teh celicah negibna med elektrodami. Ta del standarda IEC 61056 se ne nanaša na svinčeve kislinske celice in baterije, ki se uporabljajo za: – naprave za zagon vozil (serija IEC 60095), – vlečne naprave (serija IEC 60254) ali – vgrajene naprave (serija IEC 60896). Za skladnost s tem standardom je zahtevano, da se izjave in zagotovila o osnovnih podatkih o zmogljivosti, ki jih priskrbi proizvajalec, ujemajo s temi preskusnimi postopki. Preskusi se lahko uporabljajo tudi za kvalifikacijo tipov z absorpcijo v mikroporozno strukturo ali v želatinasti model.

General Information

• Status: Published
• Publication Date: 21-Jan-2013
• ICS: 29.220.20 - Acid secondary cells and batteries
• Technical Committee: ISCB - Secondary cells and batteries
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 11-Jan-2013
• Due Date: 18-Mar-2013
• Completion Date: 22-Jan-2013
• Ref Project: EN 61056-1:2012 - General purpose lead-acid batteries (valve-regulated types) - Part 1: General requirements, functional characteristics - Methods of test

Relations

• Revised: SIST EN 61056-1:2003 - General purpose lead-acid batteries (valve regulated types) -- Part 1: General requirements, functional characteristics - Methods of test
• Effective Date: 15-Feb-2011
• Replaces: SIST EN 61056-1:2003 - General purpose lead-acid batteries (valve regulated types) -- Part 1: General requirements, functional characteristics - Methods of test
• Effective Date: 29-Jan-2023
• Revised: SIST EN 61056-1:2003 - General purpose lead-acid batteries (valve regulated types) -- Part 1: General requirements, functional characteristics - Methods of test
• Effective Date: 06-May-2014
• Replaces: SIST EN 61056-1:2003 - General purpose lead-acid batteries (valve regulated types) -- Part 1: General requirements, functional characteristics - Methods of test
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61056-1:2013
01-marec-2013
6YLQþHYHNLVOLQVNHEDWHULMHWLSL]YHQWLOVNRUHJXODFLMRGHO6SORãQH]DKWHYH
IXQNFLMVNHNDUDNWHULVWLNH0HWRGHSUHVNXãDQMD
General purpose lead acid batteries (valve regulated types) - Part 1: General
requirements, functional characteristics - Methods of test
Bleibatterien für allgemeine Anwendungen (verschlossen) - Teil 1: Allgemeine
Anforderungen, Eigenschaften - Prüfverfahren
Batteries d'accumulateurs au plomb-acide pour usage général (types à soupapes) -
Partie 1: Prescriptions générales et caractéristiques fonctionnelles - Méthodes d'essai
Ta slovenski standard je istoveten z: EN 61056-1:2012
ICS:
29.220.20 .LVOLQVNLVHNXQGDUQLþOHQLLQ Acid secondary cells and
EDWHULMH batteries
SIST EN 61056-1:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61056-1:2013

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SIST EN 61056-1:2013

EUROPEAN STANDARD
EN 61056-1

NORME EUROPÉENNE
December 2012
EUROPÄISCHE NORM

ICS 29.220.20 Supersedes EN 61056-1:2003


English version


General purpose lead-acid batteries (valve-regulated types) -
Part 1: General requirements, functional characteristics -
Methods of test
(IEC 61056-1:2012)


Batteries d'accumulateurs au plomb-acide Bleibatterien für allgemeine Anwendungen
pour usage général (types à soupapes) - (verschlossen) -
Partie 1: Exigences générales et Teil 1: Allgemeine Anforderungen,
caractéristiques fonctionnelles - Eigenschaften -
Méthodes d'essai Prüfverfahren
(CEI 61056-1:2012) (IEC 61056-1:2012)





This European Standard was approved by CENELEC on 2012-03-28. 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61056-1:2012 E

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SIST EN 61056-1:2013
EN 61056-1:2012 - 2 -

Foreword
The text of document 21/768/FDIS, future edition 3 of IEC 61056-1, prepared by IEC/TC 21 "Secondary
cells and batteries" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 61056-1:2012.

The following dates are fixed:
(dop) 2013-06-14
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-03-28
standards conflicting with the
document have to be withdrawn

This document supersedes EN 61056-1:2003.
The main changes consist in adding new battery designations and an update of the requirements like the
one concerning the marking.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.

Endorsement notice
The text of the International Standard IEC 61056-1:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60051-1 NOTE  Harmonized as EN 60051-1.
IEC 60051-2 NOTE  Harmonized as EN 60051-2.
IEC 60095 series NOTE  Harmonized in EN 60095 series.
IEC 60254 series NOTE  Harmonized in EN 60254 series.
IEC 60359 NOTE  Harmonized as EN 60359.
IEC 60896 series NOTE  Harmonized in EN 60896 series.
IEC 61429 NOTE  Harmonized as EN 61429.

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SIST EN 61056-1:2013
- 3 - EN 61056-1:2012

Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60417 Data- Graphical symbols for use on equipment - -
base


IEC 60445 - Basic and safety principles for man-machine EN 60445 -
interface, marking and identification -
Identification of equipment terminals,
conductor terminations and conductors


IEC 61056-2 2012 General purpose lead-acid batteries (valve- EN 61056-2 2012
regulated types) -
Part 2: Dimensions, terminals and marking

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SIST EN 61056-1:2013

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SIST EN 61056-1:2013



IEC 61056-1

®


Edition 3.0 2012-02




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











General purpose lead-acid batteries (valve-regulated types) –

Part 1: General requirements, functional characteristics – Methods of test




Batteries d'accumulateurs au plomb-acide pour usage général (types à

soupapes) –

Partie 1: Exigences générales et caractéristiques fonctionnelles – Méthodes


d'essai













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

S
CODE PRIX


ICS 29.220.20 ISBN 978-2-88912-926-3



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

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SIST EN 61056-1:2013
– 2 – 61056-1 © IEC:2012
CONTENTS
FOREWORD. 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 9
4.1 Construction . 9
4.2 Mechanical strength. 9
4.3 Designation . 9
4.4 Marking of polarity . 10
5 Functional characteristics and specific requirements . 10
5.1 Capacity . 10
5.2 Endurance . 11
5.2.1 Cycle service endurance . 11
5.2.2 Float service endurance . 11
5.3 Charge retention . 11
5.4 Maximum permissible current . 11
5.5 Charge acceptance after deep discharge . 11
5.6 High-rate discharge characteristics . 11
5.7 Gas emission intensity . 11
5.8 Operation of regulating valve and over pressure resistance . 12
5.9 Vibration resistant characteristics. 12
5.10 Shock resistant characteristics . 12
6 General test conditions . 12
6.1 Sampling and preparation of batteries for testing . 12
6.2 Measuring instruments . 13
6.2.1 Electrical measuring instruments . 13
6.2.2 Temperature measurement . 13
6.2.3 Time measurement . 13
6.2.4 Dimension measurement . 13
6.2.5 Gas-volume measurement . 13
6.2.6 Pressure measurement . 13
7 Test methods . 14
7.1 Test conditions . 14
7.2 Capacity C (actual capacity at the 20 h discharge rate) . 14
a
7.3 High rate capacity . 14
7.4 Endurance in cycles . 14
7.5 Float service endurance . 15
7.6 Float service endurance at 40 °C . 15
7.7 Charge retention . 16
7.8 Maximum permissible current . 16
7.9 Charge acceptance after deep discharge . 16
7.10 Gas emission intensity . 16
7.10.1 Gas emission intensity with constant voltage . 16
7.10.2 Gas emission intensity with constant current (gas recombination
efficiency test) . 18

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SIST EN 61056-1:2013
61056-1 © IEC:2012 – 3 –
7.11 Operation of regulating valve and over pressure resistance . 19
7.11.1 Operation of regulating valve . 19
7.11.2 Over pressure resistance . 19
7.12 Vibration resistant characteristics. 19
7.13 Shock resistant characteristics . 19
Bibliography . 20

Figure 1 – Example of gas collection device . 17

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SIST EN 61056-1:2013
– 4 – 61056-1 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

GENERAL PURPOSE LEAD-ACID BATTERIES
(VALVE-REGULATED TYPES) –

Part 1: General requirements, functional characteristics –
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 61056-1 has been prepared by IEC technical committee 21:
Secondary cells and batteries.
This third edition cancels and replaces the second edition of IEC 61056-1 published in 2002.
It constitutes a technical revision.
The main changes consist in adding new battery designations and an update of the
requirements like the one concerning the marking.

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SIST EN 61056-1:2013
61056-1 © IEC:2012 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
21/768/FDIS 21/774/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 61056 series, published under the general title General purpose
lead-acid batteries (valve-regulated types), 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 web site 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.

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SIST EN 61056-1:2013
– 6 – 61056-1 © IEC:2012
GENERAL PURPOSE LEAD-ACID BATTERIES
(VALVE-REGULATED TYPES) –

Part 1: General requirements, functional characteristics –
Methods of test



1 Scope
This Part of IEC 61056 specifies the general requirements, functional characteristics and
methods of test for all general purpose lead-acid cells and batteries of the valve-regulated
type :
• for either cyclic or float charge application;
• in portable equipment, for instance, incorporated in tools, toys, or in static emergency, or
uninterruptible power supply and general power supplies.
The cells of this kind of lead-acid battery may either have flat-plate electrodes in prismatic
containers or have spirally wound pairs of electrodes in cylindrical containers. The sulphuric
acid in these cells is immobilized between the electrodes either by absorption in a micro-
porous structure or in a gelled form.
NOTE The dimensions, terminals and marking of the lead-acid cells and batteries which are applied by this
standard are given in IEC 61056-2.
This part of IEC 61056 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), or
• stationary applications (IEC 60896 series).
Conformance to this standard requires that statements and claims of basic performance data
by the manufacturer correspond to these test procedures. The tests may also be used for type
qualification.
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 60417, Graphical symbols for use on equipment
IEC 60445, Basic and safety principles for man-machine interface, marking and identification
– Identification of equipment terminals, conductor terminations and conductors
IEC 61056-2:2012, General purpose lead-acid batteries (valve-regulated types) – Part 2:
Dimensions, terminals and marking
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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SIST EN 61056-1:2013
61056-1 © IEC:2012 – 7 –
3.1
general purpose lead-acid cells and batteries of the valve-regulated type
cells and batteries which provide the valve mechanism that opens when the internal pressure
of the battery rises and has a function to absorb oxygen at its negative plates
3.2
cell
basic functional unit, consisting of an assembly of electrodes, electrolyte, container, terminals
and usually separators, that is a source of electric energy obtained by direct conversion of
chemical energy
3.3
monobloc battery
battery with multiple separate but electrically connected cell compartments each of which is
designed to house an assembly of electrodes, electrolyte, terminals or interconnections and
possible separators
3.4
nominal voltage
suitable approximate value of the voltage used to designate or identify a cell, a battery or an
electrochemical system
3.5
final voltage
specified voltage of a battery at which the battery discharge is terminated
3.6
discharge current
I
20
discharge current for which the duration of discharge under the specified conditions is 20 h to
a final voltage of 1,75 V/cell
Note 1 to entry The unit of I shall be ampere (A).
20
3.7
discharge current
I
1
discharge current for which the duration of discharge under the specified conditions is 1 h to a
final voltage of 1,60 V/cell
Note 1 to entry The unit of I shall be ampere (A).
1
3.8
rated capacity
C
20
quantity of electricity, declared by the manufacturer, which under the specified conditions can
be discharged from the battery at a rate of I to a final voltage of 1,75 V/cell
20
Note 1 to entry The unit of C shall be ampere hour (Ah).
20
3.9
rated capacity
C
1
quantity of electricity, declared by the manufacturer, which under the specified conditions can
be discharged from the battery at a rate of I to a final voltage of 1,60 V/cell
1
Note 1 to entry The unit of C shall be ampere hour (Ah).
1

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SIST EN 61056-1:2013
– 8 – 61056-1 © IEC:2012
3.10
actual capacity
C
a
quantity of electricity, which can be discharged from the battery at a specified rate of
discharge to a specified final voltage
Note 1 to entry The unit of C shall be ampere hour (Ah).
a
3.11
DOD
depth of discharge
measure of a battery´s state of discharge, expressed in percent as the ratio between the
discharged capacity and the battery´s rated capacity
3.12
high-rate discharge characteristic
the discharge characteristics of a battery when discharged at a comparatively large current
relative to its capacity
3.13
gas recombination efficiency
the ratio between gas emitted from the cell and the amount of gas produced inside the cell by
the float current
Note 1 to entry Amount of gas = 0,63 L/Ah*cell at normal temperature pressure.
3.14
regulating valve
a valve which operates at a certain internal pressure to exhaust gas but prevents external air
from entering into the battery
3.15
charge retention
ability of a cell or battery to retain capacity on open circuit under specified conditions
3.16
deep discharge
discharge equivalent to the most portion of capacity of a battery
3.17
cyclic application
battery operation characterized by regular discharge followed by recharge
3.18
float application
battery operation where the battery is permanently connected to a d.c. constant voltage
source, keeping the battery fully charged
Note 1 to entry In the case of power outage or surge loads, the battery takes over or supports the load.

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SIST EN 61056-1:2013
61056-1 © IEC:2012 – 9 –
4 General requirements
4.1 Construction
4.1.1 Batteries of this kind are composed of one or more cells. Multicell-batteries may be
supplied either as monobloc batteries (see IEC 60050-482) or as mechanically and electrically
interconnected single cells.
The number of cells connected in series in a battery is designated by the letter “n” throughout
this standard.
4.1.2 Batteries shall be fitted with valves. The valve shall not allow gas (air) to enter into the
cell but shall allow gas to escape from the cell at a certain internal pressure which does not
lead to deformation or other damage of the cell or battery container.
4.1.3 Batteries or cells shall be designed so that neither water nor electrolyte can be added.
They shall be suitable for storage and discharge in any orientation (for example, upside down)
without leakage of liquid from valves and/or terminal seals. They shall also withstand storage
at 20 °C ± 5 K and maximum 80 % relative humidity for one year in inverted orientation
without leakage.
4.1.4 All battery components, for example, terminals, intercell connectors, containers, etc.
shall be designed for current rates as specified in 5.4.
4.1.5 For charging, batteries or cells shall not be installed in any direction beyond 90 ° from
the upright position.
4.2 Mechanical strength
Batteries shall be designed to withstand mechanical stresses, vibrations and shocks occurring
in normal transportation, handling and use.
4.3 Designation
The batteries shall be identified by at least the following information on the surface in durable
printing:
– supplier's or manufacturer's name or trade mark;
– type designation or product name;
– nominal voltage (n × 2,0 V);
– rated capacity C (see 5.1.2);
20
– polarity;
– date of manufacture, its abbreviation or code;
– safety symbols according to national or international standards;
– recycling symbols (see IEC 61429).
If the values of functional characteristics or specific requirements are different from the values
specified in Clause 5 below, these values shall be supplied with the battery or mentioned in
the battery instructions.
Additional data such as recommended charging voltage U or charging current I , capacity at
c c
other discharge rates, battery weight, etc. shall be supplied with the battery in a suitable way.

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SIST EN 61056-1:2013
– 10 – 61056-1 © IEC:2012
4.4 Marking of polarity
The battery shall carry a marking of polarity of both terminals by the plus symbol +
(60417-5005: Positive polarity) and the minus symbol – (60417-5006: Negative polarity) on
the lid adjacent to the terminals. In the case where the battery carries a marking of polarity of
both terminals by colour it shall be as specified in IEC 60446.The positive terminal shall be
identified with red and the negative terminal with black/blue colour.
5 Functional characteristics and specific requirements
5.1 Capacity
5.1.1 The essential characteristic of a cell or battery is its capacity for the storage of electric
energy. This capacity, expressed in ampere-hours (Ah), varies with the conditions of use
(discharge current, end of discharge voltage, temperature).
5.1.2 The rated capacity C is a reference value, to be declared by the manufacturer, which
20
is valid for the discharge of a new battery at the reference temperature of 25 °C and
a discharge current:
C
20
I = (1)
20
20
in which discharge time is 20 h, to a final voltage U = n × 1,75 V and
f
where
I is expressed in amperes, and
20
C is expressed in ampere-hours.
20
5.1.3 The rated capacity C is a reference value, optionally to be declared by the
1
manufacturer, valid for the discharge at 25 °C and a discharge current:
C
1
I = (2)
1
1
in which discharge time is 1 h, to a final voltage U = n × 1,60 V and
f
where
I is expressed in amperes, and
1
C is expressed in ampere-hours.
1

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SIST EN 61056-1:2013
61056-1 © IEC:2012 – 11 –
5.1.4 The actual capacity C shall be determined by discharging a fully charged battery
a
(see 6.1.3) with constant current I in accordance with 7.2. The resultant value shall be used
20
for comparison with the reference value C or for control of the state of a battery after long
20
periods of service.
5.1.5 The determination of the actual capacity C in accordance with 7.2 may also be used
a
for comparison with particular performance data (for example, C ) indicated by the supplier.
1
In this case, the current I shall be substituted by the particular current corresponding to
20
the relevant performance data.
5.2 Endurance
5.2.1 Cycle service endurance
The cycle service endurance represents the ability of a battery to perform repeated
discharge/recharge cycles. This performance shall be tested by a series of cycles under
specified conditions with 50 % DOD at I = 3,4 × I or at I = 5 × I after which the actual
20 20
capacity of the battery shall be not less than 50 % of the nominal capacity in ampere-hours
(see 7.4). The number of cycles shall be not less than 200.
5.2.2 Float service endurance
The float service endurance represents the life performance of a battery in float application.
The endurance determined in the test 7.5 and 7.6 shall not be less than two years at 25 °C or
260 days at 40 °C.
5.3 Charge retention
The charge retention is defined as that part of the actual capacit
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