Vehicle HV Equipment Guard Member Collision Load Dispersion
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Solution Overview
Problem
Existing protection structures for high voltage electrical equipment units in vehicles require large guard members to effectively absorb collision loads, leading to increased vehicle weight and cost, which is not feasible for all vehicle designs.
Innovation Solution
A protection structure featuring a unit case with contact surfaces and a plate-shaped guard member fixed via a gap, where the guard member's flat section and swelling sections absorb and disperse collision loads, preventing excessive displacement and maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large unit support frame is used to protect the unit case, then the protection coverage is improved, but the device complexity and weight increase
Solution Approach 1:
The protection structure is divided into two functional parts: a unit support frame for structural support and attachment, and a separate plate-shaped guard member for collision protection. This segmentation allows each component to be optimized independently, reducing overall complexity while maintaining protection coverage.
Solution Approach 2:
The plate-shaped guard member acts as an intermediary element between the unit case and external collision forces. It absorbs and disperses impact loads before they reach the unit case, protecting the high voltage equipment without requiring the unit support frame to be excessively large or complex.
2Reliability
If the guard member size is increased to cover wider load input positions, then the protection reliability is improved, but the weight and cost increase
Solution Approach 1:
The plate-shaped guard member features localized structural variations including a flat section with increased protrusion and swelling sections at specific locations. These local quality enhancements concentrate protection where collision loads are most likely to occur, providing reliable protection without requiring uniform increase in guard member size and weight.
Solution Approach 2:
The guard member design utilizes controlled deformation parameters, allowing the plate structure to absorb collision energy through elastic and plastic deformation. The flat section and swelling sections are designed with specific geometric parameters that optimize load absorption while minimizing material usage and weight.
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 efficiently receives and disperses collision loads without increasing the guard member's size, effectively protecting high voltage equipment while minimizing weight and cost increments.
Implementation Method 1
when side frames of the vehicle body are displaced toward side surfaces of the unit case in a diagonal direction in accordance with bending displacement of the side frames
Implementation Method 2
a plate-shaped guard member that is fixed to the plurality of contact surfaces and that faces the flat section via a predetermined gap
Data Source
AI summary
The high voltage electric equipment unit is mounted in between left and right side frames of a vehicle body, and is disposed so that at least a portion of an outer side surface of the unit case in a vehicle width direction faces an inner side surfaces of the side frame in the vehicle width direction. A protective structure includes a plurality of contact surfaces formed on the outer side surface of the unit case in the vehicle width direction, a flat section formed in a region surrounded by the plurality of contact surfaces of the outer side surface so as to protrude outward in the vehicle width direction with respect to other area inside the region, and a plate-shaped guard member fixed to the plurality of contact surfaces and facing the flat section via a predetermined gap.