IEC 62928:2017

Overview

IEC 62928:2017 is an international standard developed by the International Electrotechnical Commission (IEC) specifically for railway applications involving rolling stock equipped with onboard lithium-ion traction batteries. This standard provides comprehensive guidelines covering the design, operational parameters, safety protocols, data exchange, testing requirements, and marking/labeling criteria essential for lithium-ion battery systems used as energy storage solutions in railway vehicles, including hybrid traction systems.

The purpose of IEC 62928:2017 is to ensure the reliability, safety, and efficient operation of lithium-ion traction batteries aboard railway vehicles by harmonizing technical requirements and testing methods. It thus plays a vital role in advancing electric traction technology in modern railway rolling stock.

Key Topics

• Design Configuration
  The standard defines various components and configurations of the battery system including battery pack, modules, battery management system (BMS), and battery thermal management system (BTMS). This hierarchical configuration ensures proper integration and functionality within railway vehicles.

• Operational Conditions
  IEC 62928 specifies mechanical, environmental, electrical, and electromagnetic compatibility (EMC) conditions. It details acceptable temperature ranges, vibration and shock resistance, insulation coordination, and software requirements to ensure battery reliability under railway operating conditions.

• Safety Requirements
  Safety is paramount with specific guidelines on fire protection, isolation for maintenance, and safety signage. The standard emphasizes preventive measures and test protocols to minimize hazards associated with lithium-ion batteries.

• Testing Methods
  A wide range of tests including electrical, mechanical, performance, endurance, dielectric, self-discharge, and operational balancing are prescribed. These tests ensure battery system performance, safety, and longevity comply with railway industry demands.

• Marking and Documentation
  The standard mandates proper designation, nameplates, and marking of battery cells, packs, and components. Adequate documentation supports traceability and operational transparency crucial for maintenance and regulatory compliance.

Applications

IEC 62928:2017 applies to lithium-ion traction battery systems used in railway rolling stock such as:

• Energy storage systems (ESS) in hybrid traction vehicles conforming to IEC 62864-1:2016.
• Electric trains and trams requiring onboard energy storage for traction power.
• Battery modules and packs integrated into hybrid propulsion systems for enhanced energy efficiency and reduced emissions.

This standard supports manufacturers, integrators, and operators striving for safe, efficient, and standardized battery solutions in electric railway transport, enabling consistent performance and interoperability across different railway systems.

Related Standards

• IEC 62864-1:2016 - Defines hybrid traction vehicle requirements relevant to battery system integration.
• IEC 62619:2017 - Safety tests for large-format lithium-ion batteries, referenced for safety testing protocols.
• IEC Technical Committees (e.g., TC 9) - Develop additional rolling stock electrical components standards contributing to coherent railway system design.
• Railway-specific EMC and insulation standards - Complement operational requirements outlined in IEC 62928 to ensure electromagnetic compatibility and electrical safety.

For manufacturers, operators, and engineers working in railway electrification and rolling stock design, IEC 62928:2017 is an essential standard to implement onboard lithium-ion traction batteries conforming to global safety, performance, and testing requirements, supporting the advancement of sustainable and reliable railway propulsion technologies.