ISO 21782-7:2021

Electrically propelled road vehicles - Test specification for electric propulsion components - Part 7: Operating load testing of the DC/DC converter

This document specifies the operating load test and test criteria for the DC/DC converter designed as a voltage class B electric propulsion system of electrically propelled road vehicles.

Véhicules à propulsion electrique — Spécification d'essai pour les composants de propulsion électrique — Partie 7: Test de charge de fonctionnement du convertisseur DC/DC

General Information

• Status: Published
• Publication Date: 16-May-2021
• ICS: 43.120 - Electric road vehicles
• Technical Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Drafting Committee: ISO/TC 22/SC 37/WG 4 - Systems and components connected to electric propulsion systems
• Current Stage: 6060 - International Standard published
• Start Date: 17-May-2021
• Due Date: 11-Dec-2021
• Completion Date: 17-May-2021

Overview

ISO 21782-7:2021 is an international standard that defines the test specifications for operating load testing of DC/DC converters used in electrically propelled road vehicles. As part of the ISO 21782 series, this standard specifically targets voltage class B electric propulsion systems and outlines rigorous procedures to assess the endurance and reliability of DC/DC converters under simulated operational loads. The standard supports manufacturers and suppliers in validating component performance, ensuring long-term durability, and meeting quality criteria essential for electric vehicle propulsion systems.

Key Topics

• Scope and Application: Applies to DC/DC converters designed for electric propulsion systems classified as voltage class B in electrically propelled road vehicles.
• Operating Load Test: Specifies detailed test methods, including endurance testing under representative electrical current output patterns to simulate real-world operating conditions.
• Test Conditions: Defines temperature, voltage, current, ambient conditions, coolant type, and flow rates to be maintained during testing. These parameters may be mutually agreed upon by suppliers and customers to ensure relevance and accuracy.
• Test Procedures: Includes standardized test patterns representing various load cycles (with and without specific output current parameters), designed to provoke stress conditions and identify potential failures in power conversion components.
• Performance Criteria: Introduces ranking from S to F to categorize the DC/DC converter’s operational endurance based on the time before physical or functional deterioration occurs. Requires measurement of output voltage stability, efficiency after tests, and physical inspection of key components such as power semiconductor chips, DC bus capacitors, transformers, and choke coils.
• Documentation: Outlines comprehensive test reporting formats, ensuring transparent recording of test conditions, procedures, results, and compliance status.

Applications

• Electric Vehicle Component Validation: Ensures DC/DC converters used in electric propulsion meet endurance expectations for reliable, safe operation.
• Quality Assurance in Manufacturing: Manufacturers leverage these operating load tests to verify component robustness before market distribution, reducing risk of field failures.
• Supplier-Customer Agreements: Provides a standardized testing framework that facilitates consistent evaluation criteria and trust between suppliers and buyers in the automotive industry.
• Research and Development: Enables engineers to identify design weaknesses and optimize converter components through iterative endurance testing.
• Compliance with International Standards: Helps manufacturers align with ISO standards and related regulations for electric vehicle component testing, fostering global market acceptance.

Related Standards

• ISO 21782-1:2019 - General test conditions and definitions for electric propulsion components in electrically propelled road vehicles; provides foundational terms, conditions, and symbols referenced in ISO 21782-7.
• ISO 21782 Series - Covers various parts related to test specifications for electric propulsion system components, allowing comprehensive evaluation across component types.
• IEC and ISO Joint Standards - Collaborations between IEC and ISO on electrotechnical standardization complement ISO 21782-7 for harmonized testing approaches.
• Technical Barriers to Trade (TBT) Principles - ISO standards like 21782-7 adhere to WTO TBT rules, ensuring they support fair trade and global interoperability in electric vehicle technologies.

Keywords: ISO 21782-7, DC/DC converter testing, electric propulsion components, operating load test, electric vehicle standards, electric vehicle components reliability, endurance testing, electric vehicle quality assurance, voltage class B propulsion system, ISO electric vehicle standards

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21782-7
First edition
2021-05
Electrically propelled road vehicles —
Test specification for electric
propulsion components —
Part 7:
Operating load testing of the DC/DC
converter
Véhicules à propulsion electrique — Spécification d'essai pour les
composants de propulsion électrique —
Partie 7: Test de charge de fonctionnement du convertisseur DC/DC
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 1
5 Operation endurance test and requirements . 1
5.1 General . 1
5.2 Test diagram . 1
5.3 Test conditions . 2
5.4 Test procedure . 3
5.5 Test requirements . 5
5.5.1 General. 5
5.5.2 Energizing . 5
5.5.3 Disassembling . 5
6 Test report . 5
Annex A (informative) Test report . 6
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 37,
Electrically propelled vehicles.
A list of all parts in the ISO 21782 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 21782-7:2021(E)
Electrically propelled road vehicles — Test specification
for electric propulsion components —
Part 7:
Operating load testing of the DC/DC converter
1 Scope
This document specifies the operating load test and test criteria for the DC/DC converter designed as a
voltage class B electric propulsion system of electrically propelled road 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 (includi
...