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Go farther with TI’s new battery monitor

By Wisse Hettinga


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Our latest high-accuracy battery monitors and balancers for high-voltage battery management systems enable extended driving ranges and support communication robustness in hybrid and electric vehicles. 

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When paired with the  BQ79600-Q1 bridge device, the BQ79616-Q1 is the industry’s first to include a patented wake-up-at-fault feature that enables total system shutdown when the vehicle is parked or turned off, which conserves battery power, improves cell balancing and supports safety requirements.

That means, engineers can diagnose battery failures in high-voltage systems in half the time, achieve ASIL D certification and extend driving range in hybrid and electric vehicles

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 these challenges to help engineers achieve battery safety goals and maximise distance per charge in wired and wireless battery management systems.

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The BQ79616-Q1 battery monitor and balancer is the industry’s first to include a patented wake-up-at-fault feature. 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. To learn more about TI’s wake-up-at-fault feature, read the technical article, Conserve battery power in HEV/EVs with automatic host reverse wake-up.”

 Maximise driving range with high-accuracy battery monitors and balancers

 The BQ79616-Q1 is the first in a next-generation 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 analog-to-digital converter optimise 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.

This white paper  examines how battery monitoring ICs can help you meet ISO 26262 functional safety goals

 Scale battery designs to reduce cost and time to market

 TI’s new family of monitors and balancers offers multiple channel options in 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 maximise channel usage across various combinations of battery module sizes. Combining the BQ79616-Q1 with the BQ79600-Q1, engineers can design their battery management system in a closed-loop configuration with only one communication interface to further reduce component count.

 Improve system reliability with robust communication and advanced thermal management

 The BQ79616-Q1 offers robust electromagnetic compatibility (EMC) performance to withstand the harsh, noisy environments of HEVs and EVs without compromising the reliability of daisy-chain communication. In addition, the device’s pin rating enables it to withstand high-voltage transients and hot-plug events, and it incorporates autonomous cell balancing to simplify thermal management. To learn more about improving system reliability with advanced thermal management, read the technical article, “Enhance thermal management in EVs with autonomous cell balancing.

 


Our latest high-accuracy battery monitors and balancers for high-voltage battery management systems enable extended driving ranges and support communication robustness in hybrid and electric vehicles.


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