Temperature‑Compensated Multi‑Channel Monitoring for Power Batteries: Reducing Thermal Runaway Risk in New Energy Vehicles

Abstract

The safety and reliability of power batteries constitute critical bottlenecks in the rapidly expanding new energy vehicle industry, as temperature fluctuations directly impair capacity, efficiency, and thermal stability. This study proposes a high‑precision detection system incorporating temperature compensation, integrating a multi‑type thermocouple sensor array, cold junction compensation, and intelligent algorithm optimization to enable real‑time multi‑channel monitoring with a sampling accuracy of ±0.2 °C and a response time under 50 ms. Experimental results confirm effective suppression of environmental temperature interference across the ‑20 °C to 80 °C range, providing accurate data support for the Battery Management System (BMS). The system reduces thermal runaway risk by over 30%, significantly enhancing battery safety and service life, with meaningful implications for advancing the green and low‑carbon development of new energy vehicles.