Battery Housing Side Wall Cavity Structure for Impact Dampening
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Solution Overview
Problem
Existing battery housing designs with metallic frames transfer mechanical impacts undampened to plastic outer walls, potentially causing functional impairment or destruction.
Innovation Solution
A framework-like cavity structure in the side wall of the housing part that deforms upon impact to dampen and weaken mechanical forces, incorporating reinforcing ribs and a cavity structure with webs and cavities to form a crash protection zone, potentially produced in one piece for cost-efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic frame is used in the battery housing, then structural strength is improved, but mechanical impacts are transferred undampened to the plastic outer wall causing damage
Solution Approach 1:
The side wall structure is segmented into multiple cavities separated by webs, creating a framework-like cavity structure. This segmentation allows the structure to deform in a controlled manner during impact, absorbing energy while maintaining overall structural integrity. The multiple cavities act as individual energy absorption zones that collectively protect the battery compartment.
Solution Approach 2:
The side wall structure utilizes parameter changes through plastic deformation of the cavity structure during impact. The cavities are designed to collapse and deform in a controlled sequence, changing their geometric parameters from an initial state to a compressed state, thereby absorbing impact energy and preventing undampened force transfer to the battery compartment.
2Object-affected harmful factors
If a framework-like cavity structure is formed in the side wall, then impact dampening is improved, but production complexity increases
Solution Approach 1:
The framework-like cavity structure is integrated directly into the side wall structure of the housing part, merging the protective cavity function with the structural side wall function. This integration eliminates the need for separate protective components and allows the complex cavity structure to be produced as a single integrated part, reducing assembly complexity while maintaining impact protection.
3Loss of energy
If the cavity structure deforms upon impact, then energy absorption is improved, but structural integrity may be compromised
Solution Approach 1:
The side wall structure incorporates dynamic characteristics through its cavity design, allowing the structure to transition from a rigid state during normal operation to a deformable state during impact. The cavities are designed to collapse in a controlled manner during impact events, absorbing energy dynamically, while the overall framework structure maintains its integrity to continue protecting the battery compartment.
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 deformation of the cavity structure effectively reduces damage to the inner wall and battery unit by absorbing external mechanical impacts, enhancing crash protection and reducing production costs.
Implementation Method 1
The cavity structure has several webs, which are adjacent to one another in the circumferential direction and which, in the cavity structure, form several cavities, which are adjacent in the circumferential direction and which connect the inner wall to the outer wall
Implementation Method 2
In the case of an external mechanical impact on the housing part, in particular on the outer wall, the external mechanical impact is at least partially dampened and/or weakened by means of a deformation of the cavity structure
Data Source
AI summary
A housing part for a multi-part housing of a battery unit may include a bottom portion and a side wall structure arranged circumferentially on the outside along the bottom portion in the circumferential direction. The side wall structure may form at least one side wall portion along the circumferential direction. The side wall portion may have an inner wall facing the bottom portion and an outer wall, which may be spaced apart from the inner wall and may face away from the bottom portion. The inner wall may be connected to the bottom portion. The inner and outer walls may be connected to one another via a framework-like cavity structure having several webs, which may be adjacent to one another in the circumferential direction and which, in the cavity structure, may form several cavities adjacent in the circumferential direction and connecting the inner wall to the outer wall.