Texas Instruments just launched the BQ79826Z-Q1 battery monitor, the industry’s first to combine highest-cell-count monitoring with an integrated electrochemical impedance spectroscopy (EIS) engine. This isn’t just better battery monitoring; it’s predictive intelligence that catches failures before they become critical.
What makes it different
Think EIS like an electrocardiogram for batteries. Just as an EKG monitors your heart, EIS gives continuous, real-time insight into battery health, warning of issues from inside the cells themselves. Earlier fault detection that helps prevent thermal runaway and keeps passengers safe.
Key Specs
- 26 cells per device, 8 more than any competing solution
- 44% more channels than previous generations
- Voltage accuracy <2mV across –40°C to +125°C
- 5x faster EIS measurement than previous solutions
Why this cuts costs without compromising quality
Tracking more cells per chip means fewer monitoring devices in your battery pack. That’s a lower bill of materials, simpler architecture, less board space, and meaningful cost savings per channel all without sacrificing reliability.
For EVs and data center power
In electric vehicles, this translates to more accurate state-of-charge calculations, directly tackling range anxiety. Designers get longer battery life and faster charging without compromising health.
The same benefits apply to energy storage systems, where reliable monitoring is critical for AI data centers‘ growing power demands.
EIS gives engineers real-time visibility into state-of-charge and state-of-health for every cell, regardless of system size.
The chipset that scales
When paired with the BQ79881-Q1 pack monitor and optional TI communications bridge, you get a powerful chipset that works across module sizes, battery chemistries, and mechanical designs. Design once, deploy everywhere that’s how you reduce engineering overhead and accelerate time to market.
Safety credentials
Compliance with Automotive Safety Integrity Level D and ISO 26262 gives designers a smarter path to safer, longer-lasting batteries.
See it live at PCIM 2026, TI is showcasing the BQ79826Z-Q1 at PCIM 2026, June 9–11, Nuremberg, Germany (Hall 7, Booth 652). The battery monitor features in an EIS-enabled BMS reference design alongside an 11kW bidirectional onboard charger, 50kVA solid-state transformer, and SiC MOSFET short-circuit protection from Flex.
Leadership Comment
“The electrification of transportation and the rapid expansion of energy storage are redefining what battery performance must deliver, and as a leader in battery management technology, TI is uniquely positioned to meet that challenge,” said Wenjia Liu, vice president and general manager, battery management systems (BMS) at TI. “Our high-cell-count battery monitor with a built-in EIS engine helps ‘shine a light’ inside battery cells, delivering rich chemical-state data that enables systems’ software to make informed, real-time decisions on safety and performance of the battery pack, allowing engineers to address the most critical challenges in battery management.”
For more information on the BQ79826Z-Q1, see technical article “Enabling the next phase of battery intelligence.”
For more information about TI at PCIM, see ti.com/pcim.
Availability
- Preproduction quantities of the BQ79826Z-Q1 battery monitor with integrated EIS engine are now available on TI.com, with production quantities expected by the end of 2026.
- To support designers, complete development support including evaluation modules and reference designs are available.
For more information, see ti.com/BQ79826Z-Q1.
