Vehicle Power Distribution Branch Unit Vibration Isolation
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Solution Overview
Problem
The connection strength of the wiring branch part in the power distribution branch unit of vehicles is compromised due to vibrations from travel motors or engines, leading to potential electrical connection issues.
Innovation Solution
A vehicle design where the first power distribution branch unit is fixed to a part of the vehicle body different from the sub frame and main frame, which supports the travel motor and energy storage device respectively, thereby isolating it from vibrations, and includes a retainer to absorb external vibrations, allowing for improved layout flexibility and reduced wiring length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power distribution branch unit is fixed to the sub frame or main frame, then the wiring layout is simplified, but the connection strength deteriorates due to vibration transmission from the travel motor
Solution Approach 1:
The power distribution branch unit is separated from the vibration-generating components (travel motor and energy storage device) by being fixed to a different location on the vehicle body. This spatial segmentation prevents vibration transmission while maintaining wiring functionality.
Solution Approach 2:
The power distribution branch unit acts as an intermediary component located between the energy storage device and the power conversion device, but physically fixed to a separate location. This intermediary positioning allows wiring connection while isolating from vibration through location separation.
2Reliability
If the power distribution branch unit is fixed to isolate it from vibrations, then the connection strength improves, but the wiring length increases and layout flexibility decreases
Solution Approach 1:
The power distribution branch unit is fixed to a specific location on the vehicle body that has different vibration characteristics from the sub frame and main frame. This localized fixation strategy optimizes both vibration isolation and wiring length by selecting an appropriate mounting position.
Data Source
AI summary
A vehicle includes a first power distribution branch unit disposed between an energy storage device and a power conversion device and configured to branch current from the energy storage device and supply the current to the power conversion device and an electric auxiliary machine. A travel motor and the power conversion device are supported by a sub frame. The energy storage device is supported by a main frame. The first power distribution branch unit is fixed to a part of a vehicle body that is different from the sub frame or the main frame (for example, fixed to a dashboard).