Overview
- Texas Instruments formally introduced the BQ79826Z-Q1 at PCIM in Nuremberg, which the company showed on Tuesday as a 26-cell-per-device battery monitor now available in preproduction with volume production expected by the end of 2026.
- The chip embeds an EIS engine that TI says provides continuous, cell-level chemical-state data to enable earlier detection of fault conditions including signs that can precede thermal runaway.
- TI reports technical performance of under 2 mV voltage accuracy across –40°C to +125°C and EIS measurements five times faster than prior solutions, and the company says the device meets ISO 26262 ASIL D functional-safety targets.
- By supporting 26 cells per device, TI says the part delivers roughly 44% more channels than its prior generation and eight more cells than competing monitors, which should cut component count, board area and bill-of-materials for EV and energy-storage packs.
- Those claims come from TI’s announcement and demonstrations and have not been independently verified; EIS is a growing industry tool that measures electrochemical behavior inside cells to improve state-of-charge and state-of-health estimates and to give engineers earlier, cell-level visibility as systems scale.