Vehicle Battery Pack Bracket Layout for Side-Impact Crash Stroke
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Solution Overview
Problem
Existing battery pack structures fail to ensure a crash stroke due to deformation of the storage case and reinforcing bracket when impacted from the side, as the shock absorber collapses and applies load to these components.
Innovation Solution
A battery pack design featuring a bracket and second cross member with opposing beads and recessed parts arranged to distribute and absorb impact loads, ensuring a stable crash stroke by compressing and deforming these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shock absorber is arranged outside the storage case to absorb impact, then the battery pack can receive side impacts, but the shock absorber collapses and displaces toward the battery stack side, applying load to the peripheral wall of the storage case or the reinforcing bracket, causing deformation and compromising crash stroke assurance
Solution Approach 1:
The cross member is divided into multiple beads (first bead, second bead, third bead) arranged at different positions along its length. This segmentation allows different portions of the cross member to independently deform and absorb impact energy at different stages of the collision, preventing single-point failure and ensuring reliable crash stroke throughout the impact event.
Solution Approach 2:
The cross member features localized bead structures with different properties at different positions. The first bead has different deformation characteristics than the second and third beads, allowing each local region to be optimized for specific impact scenarios. This local quality variation enables controlled deformation patterns that maintain overall structural reliability during side impacts.
2Ease of manufacture
If the bead of the bracket and the bead of the second cross member are arranged at the central point between the first cross members, then the structure is symmetric, but the beads may collide directly during side impact, concentrating load and reducing crash stroke
Solution Approach 1:
The bead structures are deliberately positioned asymmetrically relative to the central point between the first cross members. The first bead, second bead, and third bead are offset from the center, creating an asymmetric arrangement that prevents direct collision of beads during side impact. This asymmetry causes impact forces to be distributed across multiple beads in sequence rather than concentrating at a single central point, thereby maintaining crash stroke reliability.
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 suppresses the possibility of crash stroke failure by distributing impact loads through the opposing beads and recessed parts, maintaining structural integrity during side impacts.
Implementation Method 1
the bead of the bracket and the bead of the second cross member are arranged oppositely to and spaced apart from a central point between the plurality of the first cross members
Implementation Method 2
The design effectively suppresses the possibility of crash stroke failure by distributing impact loads through the opposing beads and recessed parts, maintaining structural integrity during side impacts
Data Source
AI summary
A battery pack adapted to suppress the possibility that a crash stroke cannot be ensured. The battery pack according to the present disclosure is mounted on a vehicle. The battery pack includes a storage case, a plurality of first cross members extending in a width direction of the vehicle, a second cross member extending in a longitudinal direction of the vehicle, a battery module, and a bracket. The battery module, the second cross member, and the bracket are arranged between the plurality of the first cross members, and the second cross member is arranged at a position separated from the battery module in a width direction of the vehicle. The bracket is arranged between the second cross member and the battery module. The battery module is attached to the storage case via the bracket. The bracket includes a bead protruding outward in a width direction of the vehicle.