Dual Power Path Control for Vehicle Load Fault Isolation
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Solution Overview
Problem
Existing power source systems for vehicles struggle to continuously supply power when abnormalities occur in some loads, hindering continuous travel.
Innovation Solution
A power source control system with dual power sources, fuses, and voltage detectors that switch power paths to maintain supply to non-faulty loads by detecting abnormalities and switching between power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a switch in the power supply path is turned off when an abnormality occurs in a load, then the abnormal load is isolated from the power source, but the vehicle cannot travel continuously because power supply is interrupted
Solution Approach 1:
The power supply system is divided into multiple independent conductive paths (first conductive path for first load, second conductive path for second loads). Each path has its own fuse and switching mechanism, allowing selective isolation of abnormal loads while maintaining power supply to normal loads through alternative paths.
Solution Approach 2:
A control unit acts as an intermediary that monitors voltage across loads and coordinates the switching between conductive paths. When an abnormality is detected in one path, the control unit activates alternative paths to maintain continuous power supply, thus mediating between abnormality isolation and continuous operation requirements.
2Duration of action of moving object
If multiple conductive paths and switching mechanisms are added to maintain continuous power supply during abnormalities, then continuous operation is enabled, but the system complexity increases
Solution Approach 1:
The first conductive path serves dual purposes: it supplies power to the first load normally and can also supply power to second loads when needed. The control unit universally manages both conductive paths, enabling flexible power distribution that reduces the need for completely separate dedicated paths for each load.
Solution Approach 2:
Multiple conductive paths are merged at the control unit and power source level, allowing dynamic reconfiguration of power flow. The first and second conductive paths share common elements (power source, control unit, second switch), reducing overall system complexity while maintaining the ability to isolate individual abnormal loads.
Data Source
AI summary
A power source control system includes a first power source, a second power source, a first switch, a second switch, a first voltage detector, a second voltage detector, and a control unit. The first power source supplies power to a first load and a second load. The second power source supplies power to the second load when an abnormality occurs. The control unit detects the presence or absence of an abnormality based on a voltage detected by the first voltage detector and/or the second voltage detector. In addition, the control unit switches on the first switch and switches off the second switch in a normal state. Further, the control unit switches off the first switch and switches on the second switch when an abnormality is detected.