TI Battery Cell Monitoring IC Achieves ASIL Standard
Battery pack current can be measured with 0.05% accuracy.

Texas Instruments (TI) introduced its Battery Management System (BMS) technology, which extends the driving range of electric vehicles and enables fast charging and safe driving.

TI held a media briefing on the 10th and announced its latest BMS technology and industry trends.

Samuel Wong, General Manager of TI Battery Management Solutions, took the stage as a presenter that day and explained BMS trends and TI's technology.

BMS technology plays a crucial role in achieving the driving range, reliability, economy, and safety of electric vehicles.

Today's BMS trends require improved cell monitoring accuracy to facilitate the widespread adoption of LFP battery materials.

In addition, there is a trend to connect the pack monitoring device of the Battery Junction Box (hereinafter BJB) to the Battery Control Unit (BCU) via a daisy-chain interface or to use a wireless interface.

The BQ79718-Q1 battery cell monitor device and the BQ79731-Q1 battery pack monitor device, which are additions to TI's BMS portfolio, provide high accuracy and precision in measuring battery voltage, current, and temperature.

Through this, by accurately measuring the battery state of charge (SOC) and battery performance (SOH), driving range is maximized and It enabled increased reliability of electric vehicle batteries.

“The BQ79718-Q1 can maximize the actual driving range of electric vehicles by accurately measuring high-performance battery cell voltage down to 1mV,” explained Samuel Wong, General Manager. “The BQ79718-Q1 battery cell monitoring IC can charge and discharge vehicle battery packs with accuracy that meets ASIL standards.”

▲ TI BQ79718-Q1 Features (Image Source: TI)

The BQ79731-Q1 used in the intelligent BJB architecture can measure battery pack current with an accuracy of up to 0.05%.

The BQ79731-Q1 also improves voltage and current measurement capabilities with low noise and can enhance the ability to predict battery charge status with low synchronization delay.

Samuel Wong said, “Vehicle manufacturers are aiming to maximize the driving range of electric vehicles, and this requires accurate prediction of battery charge status,” adding, “TI’s newly released device will give vehicle manufacturers the confidence to accurately measure the actual driving range of electric vehicles through superior voltage and current measurement accuracy.”