IEC 62877-2:2016

Electrolyte and water for vented lead acid accumulators - Part 2: Requirements for water

IEC 62877-2:2016 applies to water for use with vented lead-acid cells and batteries, i.e. water for preparation of electrolyte and for topping up cells or batteries. The purity of refilling water has to meet higher requirements compared to filling electrolyte, because the impurities in the operating electrolyte will be gradually increased by regular addition of water. This international standard lays down requirements of the composition, purity and properties of water in the absence of specific recommendations from the manufacturer.

Electrolyte et eau pour accumulateurs plomb-acide ouverts - Partie 2: Exigences pour l'eau

L'IEC 62877-2:2016 s'applique à l'eau destinée à être utilisée avec les éléments et les batteries ouvertes, c'est-à-dire l'eau pour la préparation de l'électrolyte et pour le remplissage de complément des éléments ou des batteries. La pureté de l'eau utilisée pour les remplissages de réapprovisionnement doit satisfaire à des exigences plus sévères que celles applicables à l'électrolyte de remplissage, car la part des impuretés contenues dans l'électrolyte de fonctionnement va progressivement augmenter avec l'ajout régulier d'eau. La présente norme internationale établit les exigences pour la composition, la pureté et les propriétés de l'eau en l'absence de recommandations spécifiques du fabricant.

General Information

• Status: Published
• Publication Date: 26-Jan-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.220.20 - Acid secondary cells and batteries
• Technical Committee: TC 21 - Secondary cells and batteries
• Drafting Committee: PT 62877 - TC 21/PT 62877
• Current Stage: PPUB - Publication issued
• Start Date: 29-Feb-2016
• Completion Date: 27-Jan-2016

Standards Content (Sample)

IEC 62877-2 ®
Edition 1.0 2016-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrolyte and water for vented lead acid accumulators –
Part 2: Requirements for water

Électrolyte et eau pour accumulateurs plomb-acide ouverts –
Partie 2: Exigences pour l'eau

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IEC 62877-2 ®
Edition 1.0 2016-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrolyte and water for vented lead acid accumulators –

Part 2: Requirements for water

Électrolyte et eau pour accumulateurs plomb-acide ouverts –

Partie 2: Exigences pour l'eau

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.20 ISBN 978-2-8322-3138-8

– 2 – IEC 62877-2:2016 © IEC 2016
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Terms and definitions . 5
4 Physical and chemical requirements of water for lead-acid batteries . 6
5 Storage of purified water . 7
Bibliography . 8

Table 1 – Physical properties and requirements of purified water . 6
Table 2 – Chemical properties and requirements of purified water . 6

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROLYTE AND WATER FOR VENTED
LEAD ACID ACCUMULATORS –
Part 2: Requirements for water

FOREWORD
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International Standard IEC 62877-2 has been prepared by IEC technical committee 21:
Secondary cells and batteries.
The text of this standard is based on the following documents:
FDIS Report on voting
21/875/FDIS 21/882/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.

– 4 – IEC 62877-2:2016 © IEC 2016
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 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.
ELECTROLYTE AND WATER FOR VENTED
LEAD ACID ACCUMULATORS –
Part 2: Requirements for water

1 Scope
This part of IEC 62877 applies to water for use with vented lead-acid cells and batteries, i.e.
water for preparation of electrolyte and for topping up cells or batteries.
The purity of refilling water has to meet higher requirements compared to filling electrolyte,
because the impurities in the operating electrolyte will be gradually increased by regular
addition of water.
This international standard lays down requirements of the composition, purity and properties
of water in the absence of specific recommendations from the manufacturer.
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 62877-1, Electrolyte and water for vented lead acid accumulators – Part 1: Requirements
for electrolyte
3 Terms and definitions
3.1
electrolyte
diluted sulfuric acid (H SO ) for lead-acid accumulators. The electrolyte is prepared by mixing
2 4
concentrated sulfuric acid or sulfuric 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
Note 1 to entry: Concentrated sulfuric acid is a colorless, high corrosive and etching liquid with a density
1,84 kg/l.
3.2
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 overcharging and evaporation
3.3
reference temperature
value specified by the battery manufacturer for the indication of properties, such as the
nominal electrolyte density, the maximum electrolyte level and the nominal capacity of the
battery. The value of the nominal temperature for the indication of parameters may differ
depending on the battery type and application

– 6 – IEC 62877-2:2016 © IEC 2016
3.4
impurities
In practical use, the electrolyte may include impurities which cause damage to the battery or
reduce its power or its service life. Water added to the electrolyte will increase
...