IEC 62877-1:2023
(Main)Electrolyte and water for vented lead acid accumulators - Part 1: Requirements for electrolyte
Electrolyte and water for vented lead acid accumulators - Part 1: Requirements for electrolyte
IEC 62877-1:2023 applies to electrolytes and their components used for filling vented lead acid batteries with dry-charged cells and for electrolyte replenishment, replacement or electrolyte density adjustment of batteries in operation. This document defines the composition, purity and properties of electrolyte, for application where specific instructions from the battery manufacturer are not available. This second edition cancels and replaces the first edition published in 2016. This edition includes the following significant technical changes with respect to the previous edition:
- Addition of the concentration values of halogens in Table 4.
Electrolyte et eau pour accumulateurs plomb-acide ouverts - Partie 1: Exigences pour l'électrolyte
L' IEC 62877-1:2023 s'applique aux électrolytes et à leurs composants utilisés pour le remplissage des batteries plomb-acide ouvertes avec éléments chargés secs et pour le réapprovisionnement, le remplacement de l'électrolyte ou le réglage de la densité de l'électrolyte des batteries en fonctionnement. Le présent document définit la composition, la pureté et les propriétés de l'électrolyte pour application en l'absence d'instructions spécifiques du fabricant de batteries. Cette deuxième édition annule et remplace la première édition parue en 2016. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Ajout des valeurs de concentration des halogènes dans le Tableau 4.
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IEC 62877-1 ®
Edition 2.0 2023-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electrolyte and water for vented lead acid accumulators –
Part 1: Requirements for electrolyte
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
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IEC 62877-1 ®
Edition 2.0 2023-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electrolyte and water for vented lead acid accumulators –
Part 1: Requirements for electrolyte
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.220.20 ISBN 978-2-8322-7550-4
– 2 – IEC 62877-1:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Preparation of electrolyte for lead acid accumulators batteries . 5
5 Physical properties of diluted sulphuric acid as electrolyte . 8
5.1 Dependence of sulphuric acid electrolyte density on temperature . 8
5.2 Relationship of acid electrolyte density on at 25 °C with the content of
sulphuric acid at 25 °C . 9
5.3 Electrolyte density compared in relation to the state of discharge . 10
6 Requirements for sulphuric acid used as electrolyte . 10
6.1 Impurities of sulphuric acid of higher at high concentration degrees . 10
6.2 Impurities of limits of sulphuric acid electrolyte for first filling acid . 10
6.3 Impurities of operating limits for sulphuric acid electrolyte in operation . 11
7 Storage of electrolyte . 12
8 Remedy in the event of damage due to the electrolyte . 13
Bibliography . 14
Table 1 – Correction of density from measuring temperature to reference/specified
temperature factor to convert the acid electrolyte density found at the measuring
temperature to that at the specified reference temperature . 9
Table 2 – Acid electrolyte density at 25 °C versus percentage of sulphuric
acid at 25 °C . 9
Table 3 – Maximum allowed impurities of in diluted sulphuric acid in the density range
d ≤ 1,30 kg/l when used as filling electrolyte for lead acid batteries in the density
n
range ≤ 1,30 kg/l . 11
Table 4 – Maximum allowed impurity of diluted acid as operating electrolyte for lead-
acid batteries in the density range ≤ 1,30 kg/l impurities in diluted sulphuric acid in the
density range d ≤ 1,30 kg/l when this acid is acting as the operating electrolyte in lead
n
acid batteries . 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROLYTE AND WATER FOR VENTED
LEAD ACID ACCUMULATORS –
Part 1: Requirements for electrolyte
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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 62877-1:2016. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 4 – IEC 62877-1:2023 RLV © IEC 2023
IEC 62877-1 has been prepared by IEC technical committee 21: Secondary cells and batteries.
It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Addition of the concentration values of halogens in Table 4.
The text of this International Standard is based on the following documents:
Draft Report on voting
21/1169/FDIS 21/1172/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 62877 series can be found, under the general title Electrolyte and
water for vented lead acid accumulators, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
ELECTROLYTE AND WATER FOR VENTED
LEAD ACID ACCUMULATORS –
Part 1: Requirements for electrolyte
1 Scope
This part of IEC 62877 applies to electrolytes and their components used for filling vented lead
acid batteries, for example with dry-charged cells or batteries, and for electrolyte replenishment,
replacement or electrolyte density adjustment of batteries in operation. This document defines
the composition, purity and properties of electrolyte, for application where specific instructions
from the battery manufacturer are not available.
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 62877-2, Electrolyte and water for vented lead acid accumulators – Part 2: Requirements
for water
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
lead dioxide lead battery
lead acid battery
secondary battery with an aqueous electrolyte based on dilute sulphuric acid, a positive
electrode of lead dioxide and a negative electrode of lead
[SOURCE: IEC 60050-482:2004, 482-05-01, modified – Note 1 deleted and the term "lead acid
battery" added.]
3.2
electrolyte
diluted sulfuric acid (H SO ) for lead-acid accumulators
2 4
dilute solution of sulphuric acid (H SO ) in purified water
2 4
Note 1 to entry: The electrolyte is prepared by mixing concentrated sulphuric acid or sulphuric acid with high density
of d > 1,30 kg/l and purified water to achieve the density values specified by the battery manufacturer or specified in
standards related to the type and battery design in question for a defined state of charge. Its purity meets the
requirements laid down in Table 3.
– 6 – IEC 62877-1:2023 RLV © IEC 2023
Note 2 to entry: Concentrated sulphuric acid is a colourless and highly corrosive and etching liquid with a density
1,84 kg/l d > 1,82 kg/l.
3.3
water
purified water (H O) used for the preparation of electrolyte for
batteries and for the replacement (topping up) of water loss in the operating electrolyte due to
decomposition of water by overcharge and evaporation
Note 1 to entry: The requirements for purified water are specified in IEC 62877-2.
3.4
filling electrolyte
diluted sulphuric acid used for the first filling of dry-charged
batteries or for the replenishment, density adjustment or replacement of contaminated operating
ele
...
IEC 62877-1 ®
Edition 2.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrolyte and water for vented lead acid accumulators –
Part 1: Requirements for electrolyte
Electrolyte et eau pour accumulateurs plomb-acide ouverts –
Partie 1: Exigences pour l'électrolyte
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
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IEC 62877-1 ®
Edition 2.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrolyte and water for vented lead acid accumulators –
Part 1: Requirements for electrolyte
Electrolyte et eau pour accumulateurs plomb-acide ouverts –
Partie 1: Exigences pour l'électrolyte
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-7424-8
– 2 – IEC 62877-1:2023 © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Preparation of electrolyte for lead acid batteries . 7
5 Physical properties of diluted sulphuric acid as electrolyte . 8
5.1 Dependence of sulphuric acid electrolyte density on temperature . 8
5.2 Relationship of acid electrolyte density at 25 °C with the content of sulphuric
acid. 8
5.3 Electrolyte density in relation to the state of discharge . 9
6 Requirements for sulphuric acid used as electrolyte . 10
6.1 Impurities of sulphuric acid at high concentration . 10
6.2 Impurities limits of sulphuric acid electrolyte for first filling . 10
6.3 Impurities limits for sulphuric acid electrolyte in operation . 11
7 Storage of electrolyte . 11
8 Remedy in the event of damage due to the electrolyte . 12
Bibliography . 13
Table 1 – Correction factor to convert the acid electrolyte density found at the
measuring temperature to that at the specified reference temperature . 8
Table 2 – Acid electrolyte density at 25 °C versus percentage of sulphuric acid . 9
Table 3 – Maximum allowed impurities in diluted sulphuric acid in the density range
d ≤ 1,30 kg/l when used as filling electrolyte for lead acid batteries . 10
n
Table 4 – Maximum allowed impurities in diluted sulphuric acid in the density range
d ≤ 1,30 kg/l when this acid is acting as the operating electrolyte in lead acid batteries . 11
n
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROLYTE AND WATER FOR VENTED
LEAD ACID ACCUMULATORS –
Part 1: Requirements for electrolyte
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.
IEC 62877-1 has been prepared by IEC technical committee 21: Secondary cells and batteries.
It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Addition of the concentration values of halogens in Table 4.
– 4 – IEC 62877-1:2023 © IEC 2023
The text of this International Standard is based on the following documents:
Draft Report on voting
21/1169/FDIS 21/1172/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 62877 series can be found, under the general title Electrolyte and
water for vented lead acid accumulators, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
ELECTROLYTE AND WATER FOR VENTED
LEAD ACID ACCUMULATORS –
Part 1: Requirements for electrolyte
1 Scope
This part of IEC 62877 applies to electrolytes and their components used for filling vented lead
acid batteries with dry-charged cells and for electrolyte replenishment, replacement or
electrolyte density adjustment of batteries in operation. This document defines the composition,
purity and properties of electrolyte, for application where specific instructions from the battery
manufacturer are not available.
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 62877-2, Electrolyte and water for vented lead acid accumulators – Part 2: Requirements
for water
...
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