Vehicle Battery Pack Support Member Distribution
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Solution Overview
Problem
Vehicle battery packs mounted under floor panels are prone to shock from road surfaces, leading to increased weight due to uniform distribution of support members, which are not necessary in all regions.
Innovation Solution
A non-uniform distribution of support members in the battery pack housing case, with a higher ratio in the central region and lower ratio in the rear region, optimized to reduce weight while effectively protecting against road surface shocks, and strategically positioned to align with wheel placements for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of support members are provided uniformly in the battery pack, then the battery pack can be protected against shock from the road surface, but the amount of support members increases and the weight of the battery pack increases
Solution Approach 1:
The patent applies local quality by providing support members at different densities in different regions of the battery pack. Specifically, the central region (which includes the battery control unit) has a higher support member density with smaller intervals between members, while the front and rear regions have lower density with larger intervals. This regional differentiation provides enhanced shock protection where needed (central region) while reducing overall weight by minimizing support members in less critical areas.
2Reliability
If support members are provided in all regions of the battery pack, then comprehensive protection is achieved, but unnecessary support members increase the weight
Solution Approach 1:
The patent implements local quality by strategically differentiating support member distribution across three distinct regions: the central region receives dense support member coverage to protect the battery control unit, while the front and rear regions receive sparse support member coverage. This localized approach ensures comprehensive protection for critical components while minimizing the total quantity of support members used.
Solution Approach 2:
The patent applies segmentation by dividing the battery pack into three distinct regions (front region, central region, and rear region) and applying different support member densities to each segment. This regional segmentation allows the design to optimize protection levels according to the specific shock vulnerability and component importance of each zone, rather than applying a uniform support structure throughout.
3Volume of moving object
If the battery pack is mounted under the floor panel, then space utilization is improved, but the battery pack becomes vulnerable to shock from road surface irregularities
Solution Approach 1:
The patent applies beforehand cushioning by pre-installing multiple support members between the battery pack housing and the road surface before any shock occurs. These support members act as cushioning elements that absorb and distribute shock forces from road surface irregularities, fallen objects, or height differences. The support members are positioned in advance to protect vulnerable components, particularly the battery control unit in the central region, from future shock events.
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 reduces the overall weight of the battery pack by minimizing unnecessary support members while providing adequate shock protection, especially in regions prone to interference from road surfaces, and ensures efficient absorption of shocks through deformable support members.
Implementation Method 1
efficient absorption of shocks through deformable support members
Data Source
AI summary
A vehicle includes: a floor panel; and a battery pack mounted under the floor panel. The battery pack includes: a plurality of cell stacks; a housing case including a bottom portion and configured to house the plurality of cell stacks; and a plurality of support members provided on the bottom portion and spaced apart from one another. When a front region, a central region and a rear region are defined in a bottom view of the housing case, a ratio of a total area where the support member is provided in the central region to an area of the central region is higher than a ratio of a total area where the support member is provided in the rear region to an area of the rear region.