Underfloor Power Supply Layout for Shorter Vehicle Wire Harnesses
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Solution Overview
Problem
The existing wiring structure in hybrid vehicles requires long wire harnesses to connect high-voltage and low-voltage power supplies, which complicates the routing and increases the length of wiring, necessitating a more compact solution.
Innovation Solution
A power supply apparatus is designed to be mounted below the vehicle's floor panel, with a wiring structural body routing multiple wire harnesses, high-voltage and low-voltage electricity storage devices, and electric devices in a compact manner, allowing for reduced wire harness length and easy replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the high-voltage power supply and low-voltage power supply are disposed in separate locations (under floor/trunk and engine room respectively), then the power supply capacity is sufficient, but the wire harness length increases and wiring structure becomes complex
Solution Approach 1:
The patent combines the high-voltage power supply and low-voltage power supply into a single integrated power supply device disposed below the floor panel. This merging of previously separate power supply components eliminates the need for long wire harnesses to connect them, directly resolving the technical contradiction between maintaining sufficient power supply capacity and reducing wire harness length.
Solution Approach 2:
The patent relocates both power supplies from traditional horizontal distributions (engine room and trunk) to a vertical arrangement below the floor panel. This dimensional change in spatial organization allows the power supplies to be close together vertically while maintaining adequate power capacity, thereby reducing the horizontal wire harness length needed to connect them.
2Adaptability or versatility
If the wire harness is routed from the low-voltage power supply to the rear of the vehicle under the floor, then power can be supplied to rear electric devices, but the wiring structure becomes more complex
Solution Approach 1:
The integrated power supply device serves multiple functions: it provides both high-voltage and low-voltage power, and acts as a central hub for routing wire harnesses to various electric devices throughout the vehicle including rear devices. This multi-functionality eliminates the need for separate power supply locations and complex routing arrangements.
Solution Approach 2:
The patent segments the wire harness routing into organized paths from the integrated power supply device, with separate harnesses extending to different electric devices. This segmentation of the wiring system from a central point simplifies the overall structure compared to having distributed power supplies requiring multiple routing paths.
Data Source
AI summary
Provided is a power supply apparatus that can be disposed below a floor panel of a vehicle, including: a wiring structural body that is disposed below the floor panel, and is routed such that a first high-voltage wire harness, a second high-voltage wire harness, and a low-voltage wire harness extend along the wiring structural body; a high-voltage electricity storage device disposed below the wiring structural body; a first low-voltage electricity storage device and a second low-voltage electricity storage device that are disposed below the wiring structural body; and a 100-V charger, a first DC/DC converter, and a second DC/DC converter that are disposed below the wiring structural body.