BMS Automatic Power Control Preventing Battery Drain
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Solution Overview
Problem
Conventional battery management systems (BMS) require manual control to prevent complete discharge of batteries, leading to inefficient energy use and reduced battery lifespan due to continuous power consumption by loads when the battery charge is low.
Innovation Solution
An automatic power supply control device and method for BMS that uses a manual control signal generator, a control signal conversion part with a time delay, and a microcontroller (MCU) to automatically control power supply to loads based on battery conditions, allowing the system to recognize low charge levels and cut off power without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If manual control is used to prevent complete discharge, then battery lifespan is extended, but energy efficiency is reduced due to continuous power consumption
Solution Approach 1:
The system enables automatic power supply control where the controller autonomously monitors battery charge levels and controls the converter without manual intervention. The controller automatically cuts off power when the battery charge level is low, eliminating the need for manual operation while preventing complete discharge and extending battery lifespan.
Solution Approach 2:
The system implements feedback control by continuously monitoring the battery charge level through the converter and automatically adjusting the power supply state based on the monitored charge level. When the charge level drops below a threshold, the controller automatically cuts off power, creating a closed-loop control system that optimizes both battery lifespan and energy efficiency.
2Productivity
If manual control signal is continuously active, then power supply to load is maintained, but battery is rapidly discharged
Solution Approach 1:
The system dynamically adjusts the power supply state based on real-time battery charge levels. The controller monitors the charge level and automatically transitions the converter between on and off states, making the power supply dynamic rather than static. This ensures continuous power supply when needed while preventing rapid discharge when battery charge is low.
3Duration of action of stationary object
If automatic control is implemented, then energy efficiency is improved and battery lifespan is extended, but device complexity increases
Solution Approach 1:
The controller performs multiple functions: it controls the converter's power supply state, monitors battery charge levels, and automatically makes control decisions. By consolidating these functions into a single controller, the system achieves automatic control and extended battery lifespan without proportionally increasing overall device complexity.
Data Source
AI summary
An automatic power supply control device of a battery management system (BMS) includes a converter receiving power of a battery to convert the power to power needed for a load, wherein the power input from the battery is controlled by a manual control signal IGON) generated by a button operation of a user or by a controller (MCU), a manual control signal generator generating the manual control signal (IGON) for controlling the converter, a control signal conversion part configured to, when the manual control signal (IGON) is activated and a predetermined time has elapsed, transmit a signal (NIG) to the controller (MCU) and inactivate the manual control signal (IGON), and the controller (MCU) driven by output power of the converter and configured to activate a signal (MWAKEUP) for controlling the converter and control power supplied to the load when the signal (NIG) is received.