Battery Holder Structure for Collision-Resistant Cell Support
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Solution Overview
Problem
Battery packs in vehicles face significant challenges in protecting battery cells from deformation and damage during collisions, as existing designs lack effective mechanisms to absorb and distribute impact loads efficiently.
Innovation Solution
The battery pack design incorporates a battery holder with a planar portion and protruding portions that fit the side portions of the battery case, allowing for confining pressure on the broad width surfaces and reducing deformation likelihood by distributing loads through recessed areas, while the electrode body's design includes clearances to prevent contact with the case during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a battery holder with planar portion and protruding portions is used to hold battery cells, then the load-resistant capacity is improved and plastic deformation is reduced, but the device complexity increases
Solution Approach 1:
The battery holder is segmented into a planar portion and multiple protruding portions, each serving specific functions. The protruding portions are further segmented into recessed portions that fit into side portions of battery cases, creating a modular structure that distributes load effectively while maintaining manageable complexity
Solution Approach 2:
Different portions of the battery holder have different structural qualities optimized for their specific functions. The planar portion provides broad support surface, while the protruding portions with recessed portions provide localized constraint at critical load points. This local differentiation of structural properties enhances overall load resistance without requiring uniform complexity throughout
2Stability of the object's composition
If confining pressure is applied to broad width surfaces of battery cases, then deformation is reduced, but the stress concentration increases
Solution Approach 1:
The solution transitions from applying pressure in a single dimension to distributing constraints across multiple dimensions. The planar portion provides support in one dimension while protruding portions extend in perpendicular directions to constrain side portions, creating a multi-dimensional load distribution system that reduces stress concentration while maintaining deformation resistance
3Reliability
If clearances are provided between electrode body and battery case, then contact during deformation is prevented, but the manufacturing precision requirements increase
Solution Approach 1:
Clearances between the electrode body and battery case are designed as predetermined protective spaces that act as cushioning zones. These clearances are built into the design to prevent contact between components during deformation events, absorbing potential damage before it occurs rather than relying on precise real-time positioning
Data Source
AI summary
A battery pack disclosed herein includes a plurality of arranged battery cells and a battery holder configured to hold the battery cells. The battery holder includes a planar portion extending along a broad width surface of each of the battery cells and a protruding portion provided at each of both ends of the planar portion and protruding from the broad width surface. The protruding portion includes two recessed portions each being configured such that a corresponding one of side portions provided at both ends of the broad width surface fits therein.