Electric Vehicle

Texas Instruments introduces automotive battery monitor and balancer

Texas Instruments (TI) introduced a new automotive battery monitor and balancer that reports high-accuracy voltage measurements in systems up to 800 V. In addition, the BQ79616-Q1 streamlines Automotive Safety Integrity Level (ASIL) D compliance in hybrid electric vehicles (HEVs) and electric vehicles (EVs).

Filtering system-level noise to accurately measure battery-cell voltage and temperature and reliably reporting this information to the microcontroller (MCU) are key design challenges for automotive manufacturers. The BQ79616-Q1 addresses both of those challenges to assist engineers achieve battery safety goals and maximize distance per charge in wired and wireless battery management systems.

When paired with the BQ79600-Q1 SPI/UART communication interface, it enables total system shutdown when the vehicle is parked or turned off. This helps design engineers conserve battery power, improve cell balancing and support safety requirements.

Maximize driving range with high-accuracy battery monitors and balancers

The BQ79616-Q1 is a family of TI battery monitors and balancers to support high-accuracy monitoring for a broad spectrum of battery chemistries, including lithium-iron-phosphate (LiFePO4). This enables automotive manufacturers to more precisely measure battery state-of-charge and state-of-health, thereby reducing cost. The BQ79616-Q1’s integrated digital low-pass filter and high-precision digitizer converter optimize signal measurement accuracy, delivering cell-voltage measurements with less than 2 mV of error.

Streamline ASIL D certification with the industry’s fastest diagnostics

TI’s new monitor and balancer meets component-level requirements of ISO 26262, supporting ASIL D compliance for voltage measurement, temperature measurement and communication – dramatically reducing bill of materials (BOM) and software overhead. With the industry’s fastest time in diagnosing battery failures, 100 ms in 400-V systems, the BQ79616-Q1 enables greater system reliability and battery safety.

Improve system reliability with robust communication and advanced thermal management

The BQ79616-Q1 offers robust electromagnetic compatibility (EMC) performance to face up to the tough, noisy environments of HEVs and EVs without compromising the reliability of daisy-chain communication. In addition, the device’s pin rating enables it to face up to high-voltage transients and hot-plug events, and it incorporates autonomous cell balancing to simplify thermal management.

Scale battery designs to reduce cost and time to market

TI’s new family of monitors and balancers offers multiple channel options within the same package, providing pin-to-pin compatibility and 100% reuse of established software. Further, the BQ79616-Q1 integrates bus-bar measurement, enabling engineers to maximize channel usage across various combinations of battery module sizes. Combining the BQ79616-Q1 with the BQ79600-Q1, engineers can design their battery management system during a closed-loop configuration with just one communication interface to further reduce component count.

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