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    How BMS Improves Range, Extends Battery Life, and Ensures Li-ion Safety and Reliability

    With the electric vehicle (EV) market gaining momentum and driven by enthusiastic consumer interest, there’s an urgent need to tackle critical issues related to EV range, reliability, and battery life. Concerns about range limitations, compounded by concerns about limited charging infrastructure and safety issues highlighted in media reports, have hindered the adoption of EVs. In this context, the semiconductor automated test equipment (ATE) sector can play a crucial role in addressing and mitigating these concerns.

    The Role of Battery Management Systems (BMS) in EV Evolution

    Battery management systems (BMS) are integral to the performance and safety of EV batteries. By performing detailed cell-by-cell monitoring, a BMS can ensure battery longevity, safety, and an extended driving range. Automated test equipment (ATE), such as Teradyne’s ETS-800, is essential for testing the accuracy of these battery monitors.

    Core Functions of BMS

    1. Monitoring and Managing Performance:
    • Ensures balanced charging across individual cells.
    • Uses semiconductors for multi-channel monitoring and balancing.
    • Manages charge distribution and monitors cell state and overall battery health amid temperature and voltage changes.
    1. Assessing Cell Voltage, Current, and Temperature:
    • Determines the state of charge (SoC) and health of the battery pack.
    • Relays information to a central processing unit for optimal performance management.

    Overcoming Range Anxiety

    Improving BMS technology can significantly reduce range anxiety among EV drivers by accurately measuring the vehicle’s charge status, thus optimizing battery use and extending the driving range. Enhanced accuracy in monitoring the SoC facilitates more efficient charge and discharge cycles, improving battery life and reducing the need for frequent charging stops.

    1. Accurate SoC Measurement:
    • Increases usable battery energy.
    • Extends driving range significantly.
    1. Competitive Advantage:

    Combined with advancements in battery technology and vehicle design, manufacturers can offer greater mileage on a single charge.

    Li-ion Batteries and BMS: Efficiency and Safety

    Accurate monitoring of EV battery cells is crucial for managing range anxiety and ensuring the safety and reliability of Li-ion batteries. These batteries, while offering advantages in energy efficiency, density, and lifespan, require careful energy management to mitigate ignition risks. A sophisticated battery management system (BMS) has the capability to safely oversee charge and discharge cycles, leading to an extension of battery life while also minimizing the risks associated with fires.

    Flexible ATE Solutions:

    • Support accurate SoC determination amid evolving battery chemistries.
    • Ensure safety and reliability.

    Navigating the complexities of evolving EV battery technologies presents a fresh set of challenges

    As the EV industry expands, it drives innovations in battery voltage and architecture, resulting in enhanced capabilities like extended range and rapid charging. This progression underscores the importance of future-proof test equipment that can accommodate new technologies and validate automotive quality standards.

    1. Advancements in Voltage Systems:
    • From 400V to 800V systems, requiring rigorous BMS innovation and testing.
    • Crafting strategies to alleviate consumer worries regarding range anxiety and battery longevity is crucial in the EV industry’s evolution.
    1. Advanced Instrumentation:

    Companies in the semiconductor ATE sector, such as Teradyne, are addressing this demand by introducing solutions like the ETS-800 platform, specifically engineered for precise and high-voltage BMS testing.

    Teradyne’s ETS-800 Platform

    The ETS-800 platform from Teradyne represents a cutting-edge automotive test platform designed for high throughput and rapid time to market. Its precision instrumentation and assured specifications ensure stable and repeatable results across testers and devices. The multi-sector architecture of the ETS-800 seamlessly scales from single or low-site-count program development applications to high-site-count programs with minimal effort, facilitating automatic achievement of high parallel test efficiency.


    In conclusion, the role of BMS in alleviating EV buyer anxiety cannot be overstated. As the EV market continues to grow, the semiconductor ATE sector’s contributions to BMS testing will be crucial in ensuring the safety, reliability, and extended range of EV batteries, ultimately driving broader adoption and acceptance of electric vehicles.

    Rashi Bajpai
    Rashi Bajpai
    Rashi Bajpai is a Sub-Editor associated with ELE Times. She is an engineer with a specialization in Computer Science and Application. She focuses deeply on the new facets of artificial intelligence and other emerging technologies. Her passion for science, writing, and research brings fresh insights into her articles and updates on technology and innovation.

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