American technology-based company, Texas Instruments (TI) has unveiled new automotive battery cell and pack monitors with the most accurate measurement capability available on the market, maximizing electric vehicle (EV) drive time and enabling safer operation.
The BQ79718-Q1 battery cell monitors and BQ79731-Q1 battery pack monitor are the newest products in TI’s comprehensive BMS offering.
The BQ79731-Q1 and BQ79718-Q1 devices provide an unprecedented level of accuracy and precision in measuring battery voltage, current and temperature to effectively determine the true range of a vehicle and increase the overall life and safety of the battery pack.
“Automakers 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 automakers confidence to accurately measure an EV’s true range.”
TI will demonstrate its BMS technology featuring the new BQ79718-Q1 and BQ79731-Q1 devices at CES 2023.
The BQ79718-Q1 allows automakers to maximize the true range of their EV with high-performance battery cell voltage measurements down to 1 mV of accuracy, and the BQ79731-Q1 allows measurement of the battery pack current down to 0.05% of accuracy.
These innovations will provide the clearest picture possible to measure the accurate state of charge and state of health at the individual cell and pack level, effectively reflecting true remaining mileage and instilling confidence in the battery life of their EV.
In addition, industry-leading voltage and current synchronization (64 µs) enable 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.
The BQ79718-Q1 battery cell monitoring integrated circuit achieves an unprecedented Automotive Safety Integrity Level (ASIL) accuracy (main path, redundant path and residual error seeking) giving automakers the ability to charge and discharge a vehicle battery pack beyond any cell monitor previously on the market.
The BQ79718-Q1 battery cell monitors and BQ79731-Q1 pack monitor join TI’s portfolio of high-precision battery monitors and balancers. Additionally, the family includes the BQ79600-Q1 SPI/UART communication bridge device, which enables reliable and fast daisy-chained communication using an isolated communication protocol.
This family adds to TI’s holistic offering for BMS, which also includes the CC2662R-Q1 wireless microcontroller (MCU) for wireless BMS, TPSI3050-Q1 isolated switch driver and TPSI2140-Q1 isolated switch device.
TI also provides a BMS design suite that includes a reference board, emulator and Automotive Open System Architecture complex device driver.