Polyhedral Battery Cell Layout for Impact and Vibration Stiffness
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Solution Overview
Problem
Conventional battery technologies face challenges in enhancing the stiffness and strength of battery cells, particularly in electric vehicles, where impact and vibration can lead to performance degradation and safety risks due to insufficient structural integrity.
Innovation Solution
The design of battery cells as polyhedral structures with a first wall perpendicular to the direction of gravity and a second wall with the largest area oblique to the first direction, allowing adjacent cells to interact and bind through oblique second walls, thereby increasing overall stiffness and strength, and incorporating spacers and thermal management components for enhanced stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional battery cell structures are used, then manufacturing simplicity is maintained, but stiffness and strength are insufficient leading to safety risks under impact and vibration
Solution Approach 1:
The battery cell employs an asymmetric polyhedral structure where the second wall is oblique to the first direction (gravity direction) while the first wall is perpendicular to the first direction. This asymmetric geometry creates interaction forces between adjacent cells that enhance overall structural strength and stiffness, resolving the contradiction between maintaining manufacturing simplicity and improving mechanical strength.
2Reliability
If battery cells are arranged to maximize interaction forces, then stiffness and strength are enhanced, but device complexity increases due to multiple components like spacers and thermal management components
Solution Approach 1:
The polyhedral battery cell structure serves multiple functions: the oblique second wall provides both structural strength enhancement through interaction forces and thermal management capability. By integrating these functions into the fundamental cell geometry rather than adding separate components, the design improves reliability while controlling complexity.
Solution Approach 2:
The patent combines structural support function and thermal management function into the same polyhedral cell structure. The oblique second wall simultaneously contributes to mechanical strength through interaction forces with adjacent cells and provides thermal management pathways, merging multiple functions into a unified design that enhances reliability without proportionally increasing component count.
Data Source
AI summary
Embodiments provide a battery, an electric apparatus, a method for manufacturing battery, and an apparatus for manufacturing battery, so as to enhance stiffness and strength of the battery. The battery includes: a box; and at least one row of battery cells accommodated in the box, where the battery cell is a polyhedral structure and includes a first wall and a second wall connected to each other, the first wall being perpendicular to a first direction, the second wall being a wall with a largest area in the battery cell and oblique to the first direction, and the first direction being parallel to the direction of gravity. Each row of battery cells in the at least one row of battery cells are arranged along a second direction perpendicular to the first direction, and adjacent ones of the battery cells are attached to each other via the second wall.