Smart auxiliary contact-based contactor state detection system and method
The battery system uses auxiliary contacts to monitor contactor status, addressing the inefficiencies of conventional methods by providing a cost-effective and reliable solution for rapid detection of abnormalities in high-voltage systems.
WO2026127503A1PCT designated stage Publication Date: 2026-06-18LG ENERGY SOLUTION LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2025-12-03
- Publication Date
- 2026-06-18
AI Technical Summary
Technical Problem
Conventional methods for detecting contactor status in battery systems are costly and prone to failure, leading to maintenance issues and potential damage due to fused contactors that fail to respond to control signals.
Method used
A battery system utilizing auxiliary contacts (COM, NC, NO pins) for monitoring contactor status, providing a cost-effective and reliable solution by continuously detecting contactor conditions with minimal additional components, allowing rapid diagnosis of abnormalities.
Benefits of technology
The system accurately and efficiently monitors contactor status, reducing downtime and maintenance costs by continuously checking contactor conditions, suitable for high-voltage systems like electric vehicles and renewable energy systems.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure KR2025020637_18062026_PF_FP_ABST
Abstract
A battery system for monitoring a state of a battery sub-pack can be provided. The battery system may comprise: a battery unit; a positive contactor which is electrically connected to a positive terminal of the battery unit, and which has a main positive contactor and an auxiliary positive contactor that includes a common (COM) pin, a normally closed (NC) pin and a normally open (NO) pin; a negative contactor electrically connected to a negative terminal of the battery unit; a microprocessor for controlling the positive contactor and the negative contactor; a COM control circuit for providing an electrical signal to COM pin; an NC sensing circuit for monitoring an electrical signal from the NC pin and transmitting first information related to the electrical signal from the NC pin to the microprocessor; and an NO sensing circuit for monitoring an electrical signal from the NO pin and transmitting second information related to the electrical signal from the NO pin to the microprocessor.
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