Deformable Bracket for Vehicle Battery Crash Stroke
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Solution Overview
Problem
Existing battery support structures for vehicles face challenges in securing both a sufficient crashable stroke during side-on collisions and maintaining a high battery loading capacity, often requiring increased component strength and weight, which affects fuel efficiency and drivability.
Innovation Solution
A deformable bracket is used to support the battery pack, allowing it to move inward and descend during a collision, thereby increasing the crashable stroke without increasing the battery pack's up-down dimension, and preventing interference with other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clearance between the battery pack and the side frame is increased to secure an allowable amount of lateral direction displacement in the side frame, then a crashable stroke can be secured, but a maximum loadable capacity of the battery pack decreases
Solution Approach 1:
The bracket is designed to be deformable rather than rigid, allowing it to dynamically change its support characteristics during collision. The bracket deforms in the vehicle width direction to provide crashable stroke while maintaining battery pack support, resolving the contradiction between securing crashable stroke and maintaining battery loading capacity
Solution Approach 2:
The bracket's physical state is changed from rigid to deformable, allowing it to change shape during collision events. This parameter change enables the bracket to provide both structural support for battery capacity and controlled deformation for crashable stroke
2Strength
If the strength of components such as the side frames and side sills is increased in order to absorb an input load, then energy absorption capability is improved, but weight and cost increase and fuel efficiency and drivability decrease
Solution Approach 1:
The energy absorption function is extracted from the side frames and side sills and transferred to the deformable bracket. This allows the main structural components to maintain their original strength and weight characteristics while the bracket provides the necessary collision energy absorption through controlled deformation
3Stability of the object's composition
If the bracket is made rigid to securely support the battery pack, then battery pack stability is improved, but crashable stroke cannot be secured
Solution Approach 1:
The bracket transitions from a static rigid structure to a dynamic deformable structure that can adapt its characteristics based on loading conditions. During normal operation, it provides stable support; during collision, it deforms to provide crashable stroke
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 enhances the vehicle's ability to absorb collision energy while maintaining a high battery loading capacity, reducing the need for increased component strength and weight, thus improving fuel efficiency and drivability.
Implementation Method 1
The deformable bracket deforms in response to an input from one end of the battery pack in the vehicle width direction so as to cause the other end of the battery pack to move in an input direction and descend relative to the vehicle body
Data Source
AI summary
There is provided a battery support structure for a vehicle. The battery support structure for a vehicle includes: a battery pack formed by housing a secondary battery in a case and disposed in a lower part of a vehicle body; and a deformable bracket that supports one end portion of the battery pack in a vehicle width direction. The deformable bracket deforms in response to an input from one end of the battery pack in the vehicle width direction so as to cause the other end of the battery pack to move in an input direction and descend relative to the vehicle body.