More
    HomeTechnologySTMicroelectronics makes lithium batteries perform better and last longer with high-accuracy BMS...

    STMicroelectronics makes lithium batteries perform better and last longer with high-accuracy BMS controller

    STMicroelectronics’ L9961 battery-management-system (BMS) device provides market-leading accuracy and flexibility to enhance the performance, lifetime, and safety of Li-ion and Li-polymer batteries.

    Suitable for battery packs up to 25V, the L9961 provides monitoring, balancing, and protection of batteries for diverse applications requiring the high energy density of lithium batteries. Cordless power tools, backup energy-storage systems, uninterruptible power supplies, portable and semi-portable equipment, and medical devices can benefit from the L9961’s advanced features.

    The many built-in features include a dual pre-driver for controlling battery-pack safety relays, which can be programmed for high-side and low-side connection.  An embedded non-volatile memory for configuration data relieves the microcontroller from reprogramming the device at each startup. An I2C interface handles configuration and host communication to share battery state-of-charge (SOC) and state-of-health (SOH).

    Thanks to a high-resolution analog-to-digital converter (ADC) and current-sense amplifier, the L9961 senses cell voltages with an accuracy of ±15mV and battery current to within 0.25%. The accurate measurements enable high-accuracy passive cell balancing and coulomb counting, and support safety features including overvoltage and undervoltage detection, balance undervoltage protection, overcurrent detection, and short-circuit in-discharge protection. When an external thermistor is connected, the L9961 performs pack temperature monitoring with over/under-temperature detection and pack-fuse management. The L9961 is also highly robust to support hot plugging.

    While extending the battery lifetime and increasing safety, the L9961 consumes minimal energy from the battery pack. Two power-saving modes cut the current consumption down to 2μA in deep-sleep and 5μA in standby with the integrated voltage regulator active to resume operation quickly.

    The L9961 is in production and is available now in a 32-lead 5mm x 5mm x 1mm VFQFPN package, prices start from $1.19 for orders of 1000 pieces.

    Related Post

    Most Popular

    Best Picks

    STM32CubeMonitor 1.7, STM32CubeMonitor-UCPD 1.3, and STM32CubeMonitor-RF 2.12, more powerful data manipulations

    Author: STMicroelectronics STM32CubeMonitor 1.7 became more flexible thanks to new UI improvements in an effort to adapt to the many use cases it must handle. For...

    Driving the Future: Exploring Innovations in the Automotive Power...

    The global automotive power electronics market is set to achieve a valuation of US$ 6 billion by 2033, advancing at 4.1% CAGR from 2023 to 2033, as...

    Empowering Karnataka’s Electronics Industry: An Insightful Conversation with CLIK...

    Karnataka, a shining star in India's technological landscape, has earned international acclaim for its thriving electronics and IT sectors. Fuelled by a legacy of...

    Aimil Ltd.: Setting the Benchmark for Instrumentation Solutions at...

    Aimil Ltd., an ISO 9001:2015 certified company with a heritage tracing back to 1932, holds a prominent position as a leading provider of cutting-edge...

    Electrify Your Future: A Thriving Career in the E-Mobility...

    In an era where sustainability and innovation reign supreme, the E-Mobility sector has emerged as the driving force behind a transformative shift in the...

    X0115ML, the smallest SCR now supports a surge peak...

    Author: STMicroelectronics The X0115ML is our first compact silicon control rectifier (SCR) for ground fault circuit interrupters (GFCIs) and arc-fault circuit interrupters (AFCIs) that can withstand a...

    Exploring the Future of Electronics: Unveiling the Power of...

    In a recent interview conducted by technology journalist Himanshu Vaibhav of eletimes.com and timesev.com, Dr. John W. Mitchell, President & CEO of IPC, discussed...

    Navigating Defense Challenges: Insights from Chris Peters, USPAE Founding...

    In a recent interview conducted by technology journalist Himanshu Vaibhav from eletimes.com and timesev.com, Mr. Chris Peters, the Founding Executive Director of the U.S....

    Driving Innovation: Cientra’s Leadership in Automotive and Telecom Technology...

    Cientra stands as a prominent leader in the realm of technology solutions. Consistently, they innovate and advance their proprietary technologies to cater to the...

    Must Read