Polyhedral Battery Cell Layout for Swelling and Vibration Resistance
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Solution Overview
Problem
Current battery technologies face challenges in enhancing safety and energy density due to deformation and vibration impacts during charge and discharge, leading to potential safety risks and inefficient space utilization.
Innovation Solution
The design incorporates polyhedral battery cells of different shapes within a battery, where specific walls are inclined to interact with attachment walls, distributing forces and reducing deformation, and utilizing a separation member for structural support and thermal management, allowing for efficient assembly and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are arranged in conventional configurations, then assembly is simple, but space utilization is inefficient and deformation occurs during charge and discharge
Solution Approach 1:
The patent employs asymmetric polyhedral battery cell shapes with inclined walls instead of conventional symmetric cylindrical or prismatic designs. The inclined walls are specifically configured to interlock with attachment walls at defined angles, creating an asymmetric arrangement that maximizes space utilization while distributing mechanical stresses during charge and discharge cycles, thereby reducing deformation.
Solution Approach 2:
The battery pack is segmented into multiple polyhedral battery cells with distinct geometric configurations. Each cell is designed as a separate polyhedral unit with specific wall inclinations, allowing independent optimization of each cell's shape to fit the overall battery envelope while maintaining structural integrity and reducing individual cell deformation under load.
2Reliability
If battery cells are secured with strong attachment forces, then vibration impact resistance improves, but the cells cannot accommodate swelling during charge and discharge
Solution Approach 1:
The attachment mechanism employs local quality differentiation where specific walls of the polyhedral battery cells are designed with different properties. The inclined walls provide rigid attachment for vibration resistance, while other surfaces allow controlled movement to accommodate swelling. The attachment walls are selectively positioned and angled to provide localized structural support without constraining overall cell expansion during charge and discharge.
Solution Approach 2:
The attachment system is designed to be dynamic rather than fully rigid. The inclined walls create a mechanical interlock that can accommodate changes in cell volume and shape during operation. The geometric configuration allows the cells to swell and deform within defined parameters while maintaining attachment integrity, adapting to operational conditions without compromising vibration resistance.
3Strength
If conventional battery cell shapes are used, then manufacturing is simple, but energy density and structural strength are insufficient
Solution Approach 1:
The patent designs polyhedral battery cells with asymmetric polyhedral geometries featuring inclined walls at specific angles. These asymmetric shapes provide enhanced structural strength and optimized space utilization compared to conventional symmetric designs. The manufacturing process accommodates these complex shapes through specialized molding and assembly techniques, achieving the strength benefits despite increased manufacturing complexity.
Data Source
AI summary
Embodiments provide a battery, an electric device, and a method and device for manufacturing battery. The battery includes: a box; and at least one first battery cell and at least one second battery cell that are accommodated in the box, the first battery cell and the second battery cell being polyhedral structures of different shapes. The first battery cell and the second battery cell each include two interconnected walls, one of which is perpendicular to a first direction and the other one of which is inclined with respect to the first direction, where the first direction is perpendicular to an upper cover or a bottom wall of the box, and the inclined wall is configured to be attached to a wall of an adjacent battery cell so that interaction forces in the first direction are generated between the inclined wall and the adjacent wall.