Vehicle Power Conversion Redundancy With Switched Load Rerouting
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Solution Overview
Problem
Existing vehicle power supply systems are costly and lack redundancy to ensure traffic safety during abnormal conditions.
Innovation Solution
A power supply system with parallel first and second power conversion circuits that convert voltages to multiple levels, utilizing switches to reroute power from an auxiliary machine power supply during abnormalities, ensuring continued power supply to critical loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vehicle power supply system includes separate main and backup power supply systems with multiple DC/DC converters, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The first and second DC/DC converters are designed with identical circuit configurations and conversion capabilities, allowing either converter to serve both the first load group and second load group. This multi-functionality enables redundancy without requiring completely separate dedicated power supply paths, reducing overall system cost while maintaining reliability.
Solution Approach 2:
The patent combines the power supply paths by allowing both DC/DC converters to connect to both load groups through switching elements. This merging of functionality means that instead of having completely separate main and backup systems, the system shares resources while maintaining redundancy, thereby reducing manufacturing costs.
2Reliability
If multiple power conversion circuits are used to ensure continued power supply during abnormalities, then safety is improved, but device complexity increases
Solution Approach 1:
The power supply system is segmented into modular components: two identical DC/DC converters, multiple switching elements, and distinct load groups. This segmentation allows for simplified control of each module while maintaining overall system redundancy, making the complex system more manageable and easier to implement safely.
Solution Approach 2:
The switching elements dynamically reconfigure the power supply paths based on system state and abnormality conditions. This dynamic switching capability allows the system to adapt to failures without requiring complex permanent hardwired redundancy, reducing overall system complexity while maintaining safety.
3Reliability
If parallel power conversion circuits with switching elements are implemented, then redundancy is improved, but ease of operation increases due to automatic switching
Solution Approach 1:
The control device automatically monitors the power supply system and switches between power paths without operator intervention. When an abnormality is detected in one converter or power path, the control device automatically reconfigures the switching elements to route power through the healthy path, providing self-service operation that enhances both reliability and ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces manufacturing costs and ensures continued power supply to vehicle loads during abnormalities, enhancing traffic safety by maintaining minimal risk maneuvers.
Implementation Method 1
each of the first power conversion circuit and the second power conversion circuit is capable of converting a voltage of the first level into a voltage of a second level and a voltage of a third level
Data Source
AI summary
In a non-started-up state of a vehicle, a first power conversion circuit operates to convert a voltage of a second level from a second power supply into a voltage of a third level, a first and a second switches are each controlled to a connection state, the voltage of the second level from the second power supply is supplied to a first load and the first power conversion circuit, the voltage of the second level from the second power supply is supplied to a second load via the first switch, the voltage of the third level from the first power conversion circuit is supplied to the first load, and the voltage of the third level from the first power conversion circuit is supplied to the second load via the second switch.