Fault-Level Power Supply Control for Delayed Load Cutoff
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Solution Overview
Problem
Existing battery management systems (BMS) often fail to maintain power supply to electric devices for a sufficient duration when faults occur in fault monitoring or control components, leading to premature power cutoff and operation errors.
Innovation Solution
A power supply management apparatus with a determining unit to assess fault levels, a first control unit to set a control point for power cutoff, a second control unit to generate a maintaining command, and a third control unit to manage power supply using logic gates or a Function Inhibition Manager (FIM), ensuring power is maintained according to fault levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single control unit is used to manage power supply cutoff, then the device complexity is reduced, but the reliability of power supply maintenance deteriorates due to premature cutoff when errors occur
Solution Approach 1:
The control unit is segmented into multiple independent control units (first control unit, second control unit, third control unit), each responsible for specific functions: fault level determination, control point setting, and power supply command generation. This segmentation allows redundant control paths that prevent premature power cutoff while maintaining manageable system complexity through modular design.
Solution Approach 2:
The system implements beforehand cushioning by establishing multiple control units that can compensate for each other in case of errors. The first control unit sets a control point in time for cutoff, while the second control unit generates a maintaining command to prevent premature cutoff, cushioning against potential errors before they cause power supply failure.
2Reliability
If power supply is cut off immediately when a fault is detected, then the safety is improved, but the productivity deteriorates due to interruption of operation up to a certain point in time
Solution Approach 1:
The system dynamically adjusts the power supply cutoff timing based on fault levels. The first control unit determines the control point in time according to the fault level, allowing the system to extend power supply duration for lower-level faults while maintaining immediate cutoff for critical faults. This dynamic adjustment optimizes both safety and productivity based on the specific fault condition.
Solution Approach 2:
The system changes the parameter of power supply duration based on fault levels. By adjusting the control point in time parameter according to the determined fault level, the system allows operation to continue up to a certain point in time for non-critical faults while ensuring immediate cutoff for safety-critical situations, thus balancing safety and productivity.
3Reliability
If the control point in time is set too early, then the safety is improved, but the loss of time increases due to premature power cutoff
Solution Approach 1:
The system uses feedback by continuously monitoring fault levels and adjusting the control point in time accordingly. The determining unit assesses the fault level, and this information feeds back to the first control unit to set the appropriate control point in time, ensuring that power cutoff occurs at the optimal moment that balances safety requirements with minimizing unnecessary time loss.
Data Source
AI summary
A power supply management apparatus according to an embodiment disclosed herein includes a determining unit determining a level of a fault when the fault occurs, a first control unit setting a control point in time for cutting off power supply to a load according to the level of the fault and generating a first control command according to the control point in time, a second control unit generating a second control command corresponding to a power supply maintaining time when the fault occurs, and a third control unit generating a third control command for controlling the power supply to the load, based on the first control command and the second control command.