Engineers can leverage TI’s new BQ79826Z-Q1 battery monitor to build safer, higher-performance electric vehicles and energy storage systems
News Highlights:
- Industry-leading battery monitor supporting 26 series-connected cells with best-in-class detection accuracy, enabling more cells per device compared to competing solutions, thereby reducing system costs.
- Integrated intelligent EIS engine provides early warning of thermal runaway from within the cell, helping to ensure the safety of electric vehicles and energy storage systems.
- The BQ79826Z-Q1 is designed to help engineers build safer, higher-performance automotive and industrial applications, and is the latest addition to TI’s battery management system (BMS) product portfolio.
ShanghaiJune 11, 2026 /PRNewswire/ — Texas Instruments (TI) (NASDAQ: TXN) recently launched an industry-leading high-cell-count battery monitor with an integrated electrochemical impedance spectroscopy (EIS) engine, bringing predictive intelligence, comprehensive data, and real-time diagnostic capabilities to battery monitoring in electric vehicle (EV) and energy storage system (ESS) applications.
TI’s new BQ79826Z-Q1 battery monitor effectively enhances the safety and performance of electric vehicles and energy storage systems.
The BQ79826Z-Q1 battery monitor enhances safety and extends battery life by detecting potential faults within the cell. This single chip supports a higher number of monitored cells in its class, with tracking channels increased by up to 44% compared to previous generations. With the increased channel count, the device significantly reduces the number of components required in the battery pack, lowering system complexity and cost without sacrificing reliability. TI will showcase this innovation at electronica China 2026, held in Shanghai from July 1 to 3.
“The rapid expansion of transportation electrification and energy storage systems is redefining battery performance standards, and as a leader in battery management technology, TI is uniquely positioned to address this challenge,” said Wenjia Liu, Vice President and General Manager of TI’s Battery Management System (BMS) division. “Our battery monitor with a high cell count and built-in EIS engine acts like ‘turning on a light’ inside the cell, providing rich chemical state data that enables system software to make real-time, informed decisions about battery pack safety and performance, helping engineers tackle the toughest challenges in battery management.”
For more information, please visit ti.com/BQ79826Z-Q1.
Safety and High Performance with EIS Technology
Just as an electrocardiogram (EKG) monitors the heart, EIS is designed to monitor batteries. It provides continuous, real-time insights that reveal battery health and issue warnings before problems become critical. The integrated EIS technology enables the BQ79826Z-Q1 to detect fault conditions from within the cell earlier, helping maintain safety and alert passengers to potential vehicle hazards, such as thermal runaway.
These advantages also apply to energy storage systems, where reliable battery monitoring is crucial for meeting the growing power demands of AI data centers. In the ecosystem from grid to terminal, efficient energy storage solutions are becoming increasingly important, and EIS allows engineers to understand the state of charge and state of health of each cell in real time, regardless of system scale.
Maximizing Efficiency with Industry-Leading Cell Count
The performance of an electric vehicle or energy storage system fundamentally depends on its battery quality and efficiency. The BQ79826Z-Q1 supports up to 26 cells per single device, 8 more than competing solutions, setting a new industry standard. Fewer monitoring devices mean lower bill of materials costs, simplified architecture, and reduced board space requirements, enabling significant cost savings per channel without compromising quality or reliability.
When paired with the BQ79881-Q1 battery pack monitor and an optional TI communication bridge, these devices form a powerful chipset that adapts to different module sizes, battery chemistries, and mechanical designs, giving engineers the flexibility to “design once, deploy anywhere.” This scalability reduces engineering overhead and accelerates time-to-market for automotive and energy storage designers.
Calculating Charge Readings with Best-in-Class Accuracy
The BQ79826Z-Q1 features voltage accuracy of less than 2mV across the full temperature range of –40°C to +125°C, higher-resolution analog-to-digital converters, and ultra-low noise, enabling more precise state-of-charge calculations—addressing one of the biggest concerns for EV drivers: range anxiety. With EIS technology, the device can more accurately estimate temperature and state of charge, helping designers extend battery life and accelerate charging speeds without compromising battery health. Its EIS measurement time is five times faster than previous generation solutions, providing higher accuracy per cell for functional safety voltage readings. Compliant with Automotive Safety Integrity Level D and ISO 26262 standards, it offers designers a smarter, more efficient path to building safer, more durable batteries.
For more information, read the technical article “Advancing Battery Intelligence to the Next Stage.”
Exploring Next-Generation Power Innovations at electronica China 2026
Visitors to electronica China can stop by the TI booth (Hall N4, Booth 605) to see firsthand TI’s new products and solutions that help engineers innovate the future of power. The new BQ79826Z-Q1 battery monitor will be showcased as part of an EIS-enabled BMS reference design, alongside other innovations including an 11kW single-stage bidirectional onboard charger, a 50kVA solid-state transformer battery stack with Ethernet and fast serial interface communication, and a silicon carbide power MOSFET short-circuit protection solution using Flex technology.
Availability
- Pre-production batches of the BQ79826Z-Q1 battery monitor with integrated EIS engine are now available on TI.com, with production batches expected to be available by the end of 2026.
- To support designers, we provide complete development support including evaluation modules and reference designs.
About Texas Instruments
Texas Instruments (TI) (NASDAQ: TXN) is a global semiconductor company that designs, manufactures, and sells analog and embedded processing chips for markets including industrial, automotive, data centers, personal electronics, and communications equipment. We are committed to making electronics more affordable through semiconductor technology and making the world a better place. Today, each generation of innovation builds on the previous one, making our technology more reliable, more economical, and more energy-efficient, enabling the widespread use of semiconductors in electronic products. Visit TI.com.cn for more details.
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