TI Launches Industry-Leading Battery Monitor with Integrated EIS Technology for Smarter EV and Energy Storage Systems
Texas Instruments (TI) (NASDAQ: TXN) has introduced the industry's highest cell-count battery monitor featuring an integrated Electrochemical Impedance Spectroscopy (EIS) engine, bringing predictive intelligence, comprehensive battery insights, and real-time diagnostics to electric vehicle (EV) and energy storage system (ESS) applications. The new BQ79826Z-Q1 battery monitor enhances battery safety and longevity by identifying potential internal cell failures before they become critical issues.
Designed to deliver the highest cell monitoring capability available in a single device, the BQ79826Z-Q1 increases monitoring channels by up to 44% compared to previous generations. This expanded capacity reduces the number of components required within a battery pack, helping engineers lower system complexity and overall costs while maintaining reliability. TI will showcase the innovation at PCIM Europe 2026, taking place in Nuremberg, Germany, from June 9 to June 11.
“As electrification and energy storage technologies continue to evolve, battery systems require higher levels of intelligence, safety, and performance,” said Wenjia Liu, Vice President and General Manager of Battery Management Systems at TI. “Our new high-cell-count battery monitor integrates an EIS engine that provides detailed insights into battery chemistry and health, enabling system software to make informed real-time decisions regarding battery performance and safety.”
Advancing Battery Safety Through EIS Technology
Much like an electrocardiogram (EKG) continuously monitors heart health, Electrochemical Impedance Spectroscopy enables ongoing evaluation of battery condition. By providing real-time visibility into battery health, EIS can detect developing issues long before they become serious failures.
The integrated EIS engine within the BQ79826Z-Q1 enables earlier detection of internal battery cell abnormalities, helping prevent safety risks such as thermal runaway and improving overall system reliability. This capability allows EV manufacturers to enhance passenger safety while delivering more dependable battery performance.
The benefits extend beyond transportation. In large-scale energy storage systems, especially those supporting growing AI data center power demands, accurate battery monitoring is essential. EIS technology allows operators to continuously track the state of charge and state of health of individual battery cells, regardless of system size, improving operational efficiency and reliability.
Maximizing Efficiency with Industry-Leading Cell Monitoring
Battery performance is a critical factor in both EV and ESS applications. The BQ79826Z-Q1 supports monitoring of up to 26 battery cells per device—eight more than competing solutions—setting a new benchmark for the industry.
By increasing the number of monitored cells per device, designers can reduce the total number of monitoring units required in a battery pack. This results in a lower bill of materials (BOM), simplified system architecture, and reduced PCB space requirements, ultimately lowering system costs without compromising quality or reliability.
Combined with the BQ79881-Q1 pack monitor and optional TI communication bridge devices, the battery monitoring solution forms a scalable chipset platform that supports a wide variety of battery chemistries, module sizes, and mechanical designs. This flexibility allows engineers to develop a single design platform that can be deployed across multiple applications, reducing development costs and accelerating time-to-market.
Delivering Exceptional Measurement Accuracy
The BQ79826Z-Q1 also provides industry-leading measurement accuracy. With voltage accuracy better than 2mV across an operating temperature range of -40°C to +125°C, along with a higher-resolution analog-to-digital converter and ultra-low noise performance, the device enables more precise state-of-charge calculations.
This enhanced accuracy directly addresses one of the most significant concerns among EV users—driving range confidence. By leveraging EIS technology, engineers can achieve more accurate estimates of battery temperature and charge status, helping extend battery lifespan while enabling faster charging without compromising battery health.
Additionally, the integrated EIS engine performs measurements up to five times faster than previous solutions and provides advanced functional safety voltage monitoring at the individual cell level. Designed to support Automotive Safety Integrity Level D (ASIL-D) and compliant with ISO 26262 requirements, the BQ79826Z-Q1 offers engineers a smarter and more efficient pathway to developing safer, longer-lasting battery systems for both electric vehicles and energy storage applications.