Guidelines for the use of monitor systems for lead-acid traction batteries

IEC TR 61431:2020 is an informative document relating to aspects of automatic monitor systems as utilized in lead-acid traction battery applications. It lists the characteristics and features that need to be monitored and evaluated to properly assess the operative status of a traction battery. Guidance concerning the accuracy and reliability of the generated information is also provided.

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IEC TR 61431

Edition 2.0 2020-09

Guidelines for the use of monitor systems for lead-acid traction batteries

IEC TR 61431:2020-09(en)

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IEC TR 61431


Edition 2.0 2020-09



Guidelines for the use of monitor systems for lead-acid traction batteries




ICS 29.220.20 ISBN 978-2-8322-8854-2

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® Registered trademark of the International Electrotechnical Commission

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– 2 – IEC TR 61431:2020  IEC 2020
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Desirable characteristics and features . 6
4.1 General . 6
4.2 Physical location of the monitoring device . 6
4.3 State of charge indication or "fuel gauge" . 7
4.4 Battery temperature information . 7
4.5 High battery temperature warning . 7
4.6 Low temperature warning . 7
4.7 Electrolyte level indication . 7
4.8 Electrolyte level maintenance log . 7
4.9 Uniformity of cell properties in a battery

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