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.

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. 

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