Wake-up device of battery management system and battery system including same
The wake-up device for the BMS in electric vehicles efficiently manages power consumption by switching the BMS to a shutdown mode using an auxiliary voltage source and control circuits, addressing unnecessary power usage when the vehicle is off.
WO2026141867A1PCT designated stage Publication Date: 2026-07-02LG ENERGY SOLUTION LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
The Battery Management System (BMS) in electric vehicles consumes power even when not in operation, leading to unnecessary power consumption, particularly when the vehicle's engine is turned off.
Method used
A wake-up device that includes a power supply unit and a wake-up control circuit to manage the Main Control Unit (MCU) of the BMS, utilizing an auxiliary voltage source to switch the BMS to a shutdown mode by controlling relays and transistors based on vehicle key signals and a watchdog timer to ensure efficient power management.
Benefits of technology
Reduces power consumption of the BMS by switching it to a shutdown mode when not in use, thereby optimizing battery system efficiency and extending battery life.
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Smart Images
Figure KR2025014972_02072026_PF_FP_ABST
Abstract
A wake-up device may be provided, which wakes up a main control unit (MCU) of a battery management system for managing a plurality of battery cells. The wake-up device includes: a power supply unit that receives, through a second relay of the vehicle, a first power supply signal from an auxiliary voltage source used to start a vehicle, and provides, using the first power supply signal, an MCU with a second power supply signal required for operation of the MCU; and a wake-up control circuit that receives the first power supply signal from the auxiliary voltage source through a first relay of the vehicle in response to a key-on signal of the vehicle, and drives the second relay in an on state in response to the first power supply signal.
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