Power Distribution Device Projected Portion Collision Safety
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Solution Overview
Problem
In fuel cell vehicles, the power distribution device tends to move rearward during a collision, potentially damaging high-voltage power lines due to the lack of effective suppression mechanisms, leading to increased vehicle weight and cost.
Innovation Solution
A power distribution device is installed in the front portion of the vehicle with projected portions that interfere with vehicle components behind it, and ribs that absorb impact, preventing further movement and reducing the risk of damage to high-voltage power lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power distribution device is installed in the front portion of the vehicle with high-voltage power lines disposed behind it, then the power distribution can be efficiently organized, but the power distribution device may move rearward during collision and damage the high-voltage power lines
Solution Approach 1:
The projected portion is designed to preemptively counteract the rearward movement force during collision by interfering with the vehicle component (seat backrest) before the power distribution device can move far enough to damage the high-voltage power lines. This preliminary opposing action prevents the harmful movement.
Solution Approach 2:
The projected portion acts as an intermediary element between the power distribution device and the high-voltage power lines. During collision, it transmits the stopping force through interference with the seat backrest, preventing direct contact between the moving power distribution device and the vulnerable power lines.
2Reliability
If protectors and spaces are provided for each harness to secure safety during vehicle collision, then the safety is improved, but the vehicle weight and cost increase
Solution Approach 1:
The projected portion integrates the protective function directly into the power distribution device housing, merging the protector function with the existing device structure. This eliminates the need for separate protectors and additional spatial provisions for each harness, thereby reducing vehicle weight while maintaining collision safety.
Solution Approach 2:
The power distribution device provides its own protection through the projected portion that interferes with the seat backrest during collision. This self-protective mechanism eliminates the need for external protectors and additional safety components, reducing overall vehicle weight and cost.
3Reliability
If a projected portion is provided on the power distribution device to suppress rearward movement, then the movement during collision is suppressed, but the device complexity increases
Solution Approach 1:
The projected portion is designed as a simple protruding segment from the power distribution device case, dividing the protective function from the main device body while maintaining structural simplicity. This segmented approach adds minimal complexity while effectively suppressing rearward movement during collision.
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
The solution effectively suppresses the movement of the power distribution device during a collision, protecting high-voltage power lines and avoiding the need for additional reinforcement, thus maintaining vehicle weight and cost efficiency.
Implementation Method 1
when an external force is applied from ahead of the vehicle during a vehicle collision
Implementation Method 2
the projected portion interferes with the vehicle component that is disposed behind the power distribution device
Data Source
AI summary
A power distribution device is electrically connected to a battery, a power control unit that controls electric power in a vehicle, and high-voltage driven devices driven at a specified voltage or higher. The power distribution device distributes electric power supplied from the battery to the high-voltage driven devices, the power distribution device is installed in a front portion of the vehicle, and a high-voltage power line is disposed behind a position at which the power distribution device is installed. The power distribution device includes a projected portion provided on a surface of a case of the power distribution device, the projected portion having a height corresponding to a vehicle component disposed behind the power distribution device in the vehicle.