Resistance Alloys for Sensors and Battery Management Systems

    Low TCR and high thermal stability alloys for reliable, ultra-high precision resistors

    a diagram of an electrical tester

    Accurate Battery Management Systems with Evanohm® R

    The battery management system (BMS) is an integral part of electric vehicles and consumer electronic devices. Some people call it the “brain” of EV. The current and voltage monitoring in the battery management system is controlled via resistors. The expectation from the resistor is to demonstrate constant resistance value at different operating temperatures to provide reliable feedback to the system.

    Evanohm R provides a low temperature coefficient of resistance (TCR) to enable a reliable BMS system for EV and consumer electronics applications.

    Highly Precise and Stable Resistance Alloys

    Evanohm® R

    Sensors and control systems in electric vehicles and precision instruments, as well as aerospace and defense systems, must provide highly accurate electrical measurements at high operating temperatures. These electrical circuits require resistors with a low temperature coefficient of resistance (TCR) to operate reliably and accurately.

    Evanohm R has the lowest TCR available. It provides highly stable electrical resistance across a wide range of operating temperatures, remaining stable up to 200°C. This makes it more effective in high-power applications, such as electric vehicles, and is well suited for applications that require precise measurements across a range of operating temperatures. Battery management systems that feature Evanohm R resistors regulate voltage and current more precisely.

    Highly Precise and Stable Resistance Alloys

    No. 1 JR® (Type 1 and Type 2)

    An oxidation-resistant steel with a high specific electrical resistance as well as resistance scale. No. 1 JR has a low temperature coefficient of resistance (TCR).

    The available types have different electrical resistivities for greater adaptability for resistor design. No. 1 JR alloys are typically used in electric wire wound, edge wound, and dynamic braking resistors. The corrosion resistance properties of this alloy are suited for high reliability under severe operating conditions.

    a voltmeter on a circuit board

    Learn How to Maximize Performance From Our Alloy Experts

    Looking for material data sheets or more information on how our electrical resistance alloys have improved performance in electric systems? Visit our resource center to learn more from our experts with webinars, case studies, videos, and more available for download.


    Related Resources

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