Abstract

Achieving fast and accurate temperature measurement is critical to a battery management system (BMS) to protect battery cells against unusual situations. The BMS needs support for sufficient temperature measurement channels for multi-string battery packs. Some standards, such as GB/T 34131-2023, require measuring the temperature of every single cell with an error of less than ±1°C from -20°C to 65°C.

This document shows the user how to expand the thermistor measurement channels and improve the temperature measurement accuracy with using BQ769x2 series battery monitor and TMP6x linear thermistor.