Texas Instruments has introduced new automotive battery cell and pack monitors with what it claims are the most accurate measurement capabilities available on the market.
The BQ79718-Q1 battery cell monitor and BQ79731-Q1 battery pack monitor are the newest products in TI’s range, developed to provide accuracy and precision in measuring battery voltage, current and temperature.
“Auto makers aim to get the most range possible out of their EVs, and accurate state-of-charge estimations are vital to achieve this,” said Sam Wong, general manager for BMS at TI. “Our new devices bring substantially higher precision to voltage and current measurement, giving auto makers confidence to accurately measure an EV’s true range.”
The BQ79718-Q1 provides battery cell voltage measurements down to 1mV of accuracy, while the BQ79731-Q1 allows measurement of the battery pack current to an accuracy of 0.05%. Furthermore, voltage and current synchronization (64µs) enables instantaneous monitoring of battery pack power, providing a real-time snapshot of battery health. This level of synchronization enables electrochemical impedance spectroscopy, which provides vital insight into the cell core temperature, battery aging and state of charge of the battery.
