Dual DC-DC Converter Layout for Vehicle Power Supply Continuity
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Solution Overview
Problem
Existing vehicle power supply systems are vulnerable to failures where both DC-DC converters fail, leading to vehicle shutdown, especially due to causes like collisions, flooding, or external radio wave interference, as they are often mounted at the same location, increasing the likelihood of simultaneous failure and wiring disconnection.
Innovation Solution
The system employs two DC-DC converters mounted at distant positions within the vehicle, with one outside and one inside the vehicle interior, at least one of which is bidirectional, to ensure power supply continuity even in emergency situations by allowing alternative power routing through separate wiring paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two DC-DC converters are mounted at the same location in the vehicle, then wiring complexity is reduced and installation is simplified, but the likelihood of simultaneous failure due to collisions, flooding, or external radio wave interference increases
Solution Approach 1:
The patent divides the DC-DC converter system into two spatially separated units: a first DC-DC converter mounted in the engine compartment and a second DC-DC converter mounted in the vehicle interior. This segmentation allows the converters to be distributed across different locations, reducing the risk of simultaneous failure while maintaining functional redundancy for power supply continuity
2Reliability
If both DC-DC converters fail simultaneously, then power supply continuity is lost and vehicle operation stops, but the probability of such simultaneous failure is high when converters are co-located
Solution Approach 1:
The patent implements a backup power supply architecture where the first and second DC-DC converters are positioned at different locations with separate wiring paths. This beforehand cushioning ensures that if one converter fails due to external interference (collisions, flooding, radio wave interference), the other converter can continue to supply power, preventing complete system failure and maintaining vehicle operability
3Reliability
If DC-DC converters are mounted distant from each other, then resistance to simultaneous failure from external factors increases, but wiring complexity and installation difficulty increase
Solution Approach 1:
The patent segments the power supply system into two geographically separated DC-DC converter units with independent wiring paths. The first converter serves the engine compartment while the second serves the vehicle interior, creating natural wiring routes that minimize complexity despite the spatial separation. This segmentation achieves failure independence while managing wiring complexity through logical system division
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
This configuration reduces the likelihood of both converters failing simultaneously and facilitates easier maintenance of vehicle operation during emergencies by enabling power supply through functional converters, even if one fails, thus ensuring continuous vehicle operation.
Implementation Method 1
a first DC-DC converter connected to a power supply wiring between the switch and the power converting apparatus, and a second DC-DC converter connected to a power supply wiring between the switch and the main battery
Data Source
AI summary
A vehicle power supply system mounted on a vehicle is provided. The vehicle power supply system includes a main battery, a power converting apparatus configured to convert DC power of the main battery into AC power, a switch configured to switch a state between energization and cutoff between the main battery and the power converting apparatus, a first DC-DC converter connected to a power supply wiring between the switch and the power converting apparatus, and a second DC-DC converter connected to a power supply wiring between the switch and the main battery. The first DC-DC converter and the second DC-DC converter are mounted at positions distant from each other in the vehicle.