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    Battery-Management Chip Offers 1-mV Accuracy

    Jan. 5, 2023
    Texas Instruments introduced its latest battery-management chip that's designed to provide more accurate mileage estimates for electric vehicles.
    Related To: Electronic Design

    Check out more of our CES 2023 coverage

    Texas Instruments unveiled its latest battery monitor, the BQ79718-Q1 (see figure), for electric-vehicle (EV) battery-management systems (BMS). It can provide a more accurate range estimate for an EV thanks to the 1-mV accuracy of its sensors. I talked with Sam Wong,  General Manager for Texas Instrument's Battery Management Solutions, about the chip and its design. 

    Texas Instruments
    The BQ7918-Q1 battery monitor is designed to handle an array of cells for an electric vehicle.
    The BQ7918-Q1 battery monitor is designed to handle an array of cells for an electric vehicle.

    One of the challenges TI encountered with such a sensitive sensing platform was maintaining the accuracy while putting it in a package to meet automotive ASIL D requirements. The chip is AEC-Q100-qualified with a temperature range of -40 to +125°C. It can measure from 9 to 18 cells per device with up to 35 devices per system. 

    Check out more of our CES 2023 coverage

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