TI launches BQ79826Z-Q1 battery monitor with EIS for safer, higher-performing EVs and ESS
Texas Instruments' new BQ79826Z-Q1 battery monitor supports up to 26 cells with built-in EIS to detect thermal runaway and improve battery life.
- 26
- 44%
- <2 mV
What Happened
Texas Instruments (TI) introduced the BQ79826Z-Q1, the industry's highest-cell-count battery monitor with an integrated electrochemical impedance spectroscopy (EIS) engine. The device supports up to 26 cells in series, tracking 44% more channels than previous generations. This reduces the number of components needed in a battery pack, lowering system cost and complexity without sacrificing reliability.
“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.”
<2 mVmV
Across a full temperature range of –40°C to +125°C, enabling more accurate state-of-charge calculations.
- Supports up to 26 cells per device, eight more than any competing solution.
- Integrated EIS engine detects fault conditions from inside cells, warning of thermal runaway.
- Voltage accuracy of <2 mV and five times faster EIS measurement than previous solutions.
- Compliant with Automotive Safety Integrity Level D and ISO 26262.
Why this matters
This chip makes electric vehicles and grid batteries safer by detecting failures inside cells early, while reducing system cost and complexity.
Terms in This Story
- EIS
- Electrochemical impedance spectroscopy, a technique that monitors battery health by measuring internal resistance.
- ESS
- Energy storage system, such as large-scale batteries for grid storage.
- BMS
- Battery management system, electronics that monitor and control battery charging and safety.
- SoC
- State of charge, the current charge level of a battery relative to its capacity.
Summarised from the linked release; details can be imperfect — always verify against the original source.