Under-Seat Power Supply Mounting Structure for Collision Load Relief
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Solution Overview
Problem
Existing power supply device mounting structures in vehicles face challenges in preventing damage during frontal collisions while maintaining normal operation, as they require complex designs to allow deformation during crashes without deforming under normal loads from occupants or luggage.
Innovation Solution
A power supply device mounting structure featuring a plate member with a contact portion that interacts with the seat surface when a load is applied, preventing the plate member's edge from contacting the seat and distributing the load through vertical and contact surface portions to minimize damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid disconnection point is provided to allow floor deformation during frontal collision, then battery protection is improved, but floor deformation occurs under normal loads from occupants or luggage
Solution Approach 1:
The plate member is designed with differentiated local properties: the main body provides rigidity for collision protection, while the edge portion is specifically designed with reduced rigidity to allow controlled deformation under normal loads. This local differentiation allows the floor to accommodate occupant or luggage loads without excessive deformation while maintaining battery protection during frontal collisions.
Solution Approach 2:
The plate member is segmented into functionally distinct portions: a main body portion that maintains structural rigidity for collision protection, and an edge portion that is designed to deform controllably under normal loads. This segmentation allows different regions of the same component to serve different functions, resolving the contradiction between needing rigidity for protection and flexibility for normal operation.
2Strength
If the plate member edge contacts the seat surface during collision, then structural support is improved, but damage to seat and plate member occurs
Solution Approach 1:
The contact portion is designed to make controlled contact with the seat surface beforehand during normal operation or low-impact events. This predetermined contact point serves as a cushioning mechanism that absorbs and distributes impact forces during frontal collisions, preventing the harder edge portion from directly contacting and damaging the seat surface while maintaining necessary structural support.
Solution Approach 2:
The contact portion acts as an intermediary element between the plate member and the seat surface. It is specifically designed to interface with the seat surface, distributing contact forces and preventing direct contact between the rigid edge portion and the seat, thereby protecting both components from damage while maintaining structural integrity during collisions.
Data Source
AI summary
A power supply device mounting structure for a power supply device disposed below a seat disposed in a vehicle interior is provided. The power supply device mounting structure includes a plate member and a contact portion. The plate member is disposed between the power supply device and a seat surface portion of the seat and the plate member covers an upper surface of the power supply device. The contact portion is provided at a position facing an edge portion of the plate member and the contact portion comes into contact with the seat surface portion when a load is input from the seat surface portion.