Dual-Controller Power Supply Switching for Stable Emergency Shutdown
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery systems in devices like electric vehicles face sudden power cutoffs due to unexpected abnormal conditions in the controller, leading to safety accidents.
Innovation Solution
A power supply control apparatus with a main controller and an auxiliary controller that ensures continuous power supply by controlling a switching device to maintain operation during abnormal conditions, using predefined signals to manage power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single main controller is used to control the switching device, then the device complexity is reduced, but the reliability deteriorates due to sudden power cutoff when abnormality occurs
Solution Approach 1:
The controller is divided into a main controller and an auxiliary controller. The main controller handles normal operation, while the auxiliary controller takes over during abnormal conditions. This segmentation ensures that a single point of failure does not cause complete system shutdown, thereby improving reliability without significantly increasing overall complexity.
Solution Approach 2:
The auxiliary controller is pre-configured and ready to take over control of the switching device if the main controller fails. This preliminary preparation ensures that power supply can be maintained during abnormal conditions, preventing sudden power cutoffs and improving system reliability.
2Reliability
If the switching device is kept closed to maintain power supply during abnormality, then the reliability improves, but the object-generated harmful factors worsen due to potential safety accidents from uncontrolled power supply
Solution Approach 1:
The auxiliary controller continuously monitors the abnormal condition status and the main controller's operational state. Based on this feedback, it decides whether to maintain the switching device in the closed state or open it. This feedback mechanism ensures power supply continuity while preventing uncontrolled power supply that could lead to safety accidents.
Solution Approach 2:
The auxiliary controller acts as an intermediary between the main controller and the switching device during abnormal conditions. It takes over control to ensure proper power supply management, preventing both sudden power cutoff and uncontrolled power supply, thereby resolving the conflict between reliability and safety risks.
3Reliability
If the auxiliary controller takes over control immediately upon detecting main controller abnormality, then the power supply stability improves, but the device complexity increases due to additional control logic
Solution Approach 1:
The takeover control logic is extracted as a separate, dedicated function in the auxiliary controller rather than being integrated into the main controller's complex control logic. This extraction simplifies the overall control system architecture while maintaining controller redundancy, as the auxiliary controller's sole purpose is to take over during abnormalities.
Data Source
AI summary
A power supply control apparatus, located in a battery system which supplies power to a driving device, including: a switching device disposed on a power supply path between the battery and the driving device to electrically connect or disconnect the battery and the driving device; a main controller configured to control whether the battery should supply power to the driving device or not by controlling the switching device; and an auxiliary controller configured to control the switching device instead of the main controller in the instance that an abnormality occurs in the main controller.