A Broken Line Detection Circuit for Multi-cell Li-ion Battery Module 1

This paper presents a novel broken line detection circuit for multi-cell Li-ion Battery modules. The broken line detection technique detects test lines between the battery pack and any following circuit, e.g., BMS (battery management system). The core of the broken line detection circuit consists of an RC filter, a Brokenline Detection Block, and a bias voltage source. A system-level experiment verifies that the proposed circuit can reliably detect any disconnection of Li-ion battery pack and the following circuit to ensure the safety of the system.