IEC 62830-2:2017

Overview

IEC 62830-2:2017 is an international standard published by the International Electrotechnical Commission (IEC) that focuses on semiconductor devices designed for thermo power based thermoelectric energy harvesting. This standard specifically addresses the measurement procedures and definitions for thermo power in thin-film semiconductor materials, which are crucial components in micro-scale thermoelectric energy generators, micro heaters, and micro coolers. Applicable to thin films with thicknesses less than 5 µm as well as wire and bulk thermoelectric materials, IEC 62830-2 provides the test methods and characteristic parameters essential for accurately evaluating thermoelectric properties.

The standard caters to energy harvesting devices used across diverse sectors, including consumer electronics, general industry, military, and aerospace, without restrictions on device technology or size. Its core objective is to ensure reliable, repeatable, and standardized measurements that facilitate the development and application of thermoelectric devices.

Key Topics

• Thermo Power Measurement Techniques
  IEC 62830-2 describes two main methods for measuring thermo power (Seebeck coefficient):

  • Integral method: This straightforward approach calculates thermo power by measuring the voltage difference generated between a reference material and the sample material formed in wire thermocouples.
  • Differential method: More precise than the integral method, it involves measuring very small voltage changes related to incremental temperature differences between thermoelectric materials.

• Thermal Conductivity Measurement Methods
  To fully characterize the thermoelectric performance, thermal conductivity is measured using techniques such as the transient 3ω method, suitable for thin films on substrates or freestanding thin films. This method allows detailed evaluation of heat conduction properties critical for efficient energy conversion.

• Electrical Resistivity & Conductivity Testing
  Accurate measurement of electrical resistivity is essential for calculating thermoelectric figure of merit (Z). The IEC standard recommends four-point probe methods with rapid DC or AC switching to isolate resistive voltage from Seebeck-induced voltages, particularly on wire-type samples and thin films deposited on insulating layers.

• Standardized Terms and Parameters
  The document defines crucial terms like Seebeck coefficient (S), thermal conductivity (k), electrical conductivity (σ), and thermoelectric figure of merit (Z), aligning with IEC and ISO terminologies. These definitions ensure consistent understanding and communication between manufacturers, researchers, and users.

Applications

IEC 62830-2:2017 supports the advancement and quality assurance of thermoelectric energy harvesting devices used in:

• Consumer Electronics: Powering wireless sensors and portable electronics through ambient heat conversion.
• Industrial Systems: Enhancing energy efficiency by reclaiming waste heat for electricity generation in machinery and manufacturing processes.
• Military Equipment: Providing reliable power sources for remote or portable devices in harsh environments where conventional power options are limited.
• Aerospace Technology: Enabling long-life power generation from temperature gradients in spacecraft and satellites, ensuring energy autonomy and reliability.

By standardizing measurement techniques, IEC 62830-2 facilitates innovation in micro-scale thermoelectric generators, micro-heaters, and coolers, advancing energy harvesting technologies toward widespread commercial deployment.

Related Standards

• IEC 62830 Series: Complements other parts in the IEC 62830 series covering various semiconductor devices for energy harvesting and generation, ensuring cohesive guidelines across different energy conversion technologies.
• IEC 60050 (International Electrotechnical Vocabulary): Provides foundational definitions used in IEC 62830-2 to maintain terminological consistency.
• ISO/IEC Directives, Part 2: Governs the drafting procedures of standards like IEC 62830-2, ensuring internationally accepted standardization practices.
• Other Thermoelectric Standards: While IEC 62830-2 focuses on thin films and micro-scale devices, related standards may address bulk thermoelectric materials, assembly, and device safety.

Keywords: IEC 62830-2, thermoelectric energy harvesting, semiconductor devices, thermo power measurement, Seebeck coefficient, thermal conductivity, thermoelectric thin films, energy harvesting standards, micro-scale thermoelectric generators, thermoelectric testing methods, electrical resistivity measurement, thermoelectric devices standards, semiconductor energy generation.