Vehicle Base Bracket Geometry for Battery Displacement in Side Collisions
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Solution Overview
Problem
In existing vehicle base structures, the movement stroke of a battery unit during a broadside collision is limited, leading to inadequate displacement in the face of inertia forces, which can result in reduced safety and efficiency.
Innovation Solution
A vehicle base structure design featuring first and second structural members with a battery unit positioned between them, utilizing a bracket system with inclined and extending wall portions that allow for deformation under load, thereby increasing the movement stroke of the battery unit by generating a moment that displaces it outward and downward, enhancing its displacement during a broadside collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the battery unit is disposed using limited space between structural members, then the vehicle base structure is compact, but the movement stroke of the battery unit in a broadside collision is insufficient
Solution Approach 1:
The bracket's second wall portion is configured to extend in both the vehicle width direction and the vehicle height direction, creating a two-dimensional deformation path. When collision occurs, the battery unit can move not only horizontally but also vertically downward, effectively increasing the movement stroke by utilizing the vertical dimension in addition to the horizontal dimension.
Solution Approach 2:
The bracket is designed with flexible wall portions that can deform dynamically during collision. The second wall portion extends inward and downward, allowing the bracket to adapt its shape under load, thereby enabling the battery unit to achieve greater displacement through the dynamic deformation of the bracket structure rather than relying solely on static space.
2Length of moving object
If the bracket is made rigid to secure the battery unit, then the battery unit is firmly fixed, but the movement stroke during collision is limited
Solution Approach 1:
Different portions of the bracket have different rigidity characteristics. The first wall portion and third wall portion provide structural support and anchoring, while the second wall portion is designed to be more flexible to enable deformation. This local differentiation of quality allows the bracket to maintain overall strength while permitting controlled deformation in specific areas to increase battery unit displacement.
Solution Approach 2:
The second wall portion acts as an intermediary element between the rigid first wall portion and the battery case. It transmits and transforms the collision forces, converting horizontal impact into a combined horizontal and vertical movement of the battery unit through its inclined geometry and deformation capability.
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 design effectively lengthens the movement stroke of the battery unit, improving its displacement and stability during a broadside collision, while maintaining structural integrity and protecting the battery from external loads.
Implementation Method 1
inertia force acts on the battery unit toward the collision side
Implementation Method 2
moment centered on the connecting portion of the first wall portion and the second wall portion is generated
Implementation Method 3
the second wall portion extending inward in the vehicle width direction from an inner end portion of the first wall portion such that the second wall portion is inclined downward in a vehicle-height direction
Data Source
AI summary
A vehicle base structure includes first and second structural members extending along a vehicle front-rear direction and disposed respectively at first and second sides of a vehicle base in a vehicle width direction, a battery unit disposed between the first and second structural members, and a bracket including a first wall portion fixed to a lower surface of one of the first and second structural members, a second wall portion extending inward in the vehicle width direction from an inner end portion of the first wall portion and inclined downward in a vehicle-height direction from the inner end portion of the first wall portion, and a third wall portion extending inward in the vehicle width direction from an inner end portion of the second wall portion inward in the vehicle width direction and being fixed to a lower surface of a battery case.