Asymmetric Electrode Assemblies for Space-Efficient Battery Cells
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Solution Overview
Problem
Current battery technologies face challenges in optimizing space utilization, leading to inflexible design and reduced performance in electric vehicles, as conventional prismatic battery cells with uniform dimensions and capacities restrict efficient use of internal space.
Innovation Solution
The design of battery cells with first and second electrode assemblies of varying sizes and materials, allowing for flexible shapes and capacities, enabling polyhedral structures and improved space utilization within the battery cell, thereby enhancing energy density and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional prismatic battery cells with uniform dimensions and capacities are used, then manufacturing simplicity is maintained, but space utilization is reduced
Solution Approach 1:
The battery cell is divided into multiple compartments, each containing electrode assemblies of different sizes and capacities. This segmentation allows each compartment to be optimized independently for space utilization while maintaining standardized manufacturing processes for each module.
Solution Approach 2:
The patent employs asymmetric electrode assembly dimensions and capacities within the same battery cell, breaking the conventional uniform prismatic design. Different electrode assemblies are configured with varying lengths, widths, and capacities to match the irregular internal space of the battery cell, thereby improving overall space utilization.
2Volume of moving object
If battery cells are designed with flexible shapes and varying electrode assembly sizes, then space utilization is improved, but device complexity increases
Solution Approach 1:
Different regions of the battery cell are designed with locally optimized electrode assemblies that match the specific spatial requirements of each compartment. This allows the battery to achieve high space utilization through varied local configurations while maintaining a relatively simple overall cell structure and standardized manufacturing approaches for each local module.
3Quantity of substance
If electrode assemblies of different sizes and materials are used, then energy density is increased, but manufacturing precision requirements increase
Solution Approach 1:
The battery cell is divided into multiple compartments, each containing electrode assemblies of different sizes and capacities. This segmentation allows each compartment to be optimized independently for space utilization while maintaining standardized manufacturing processes for each module.
Solution Approach 2:
The patent varies multiple parameters of electrode assemblies simultaneously, including dimensions (length, width, thickness), capacity, and material composition, to optimize energy density. Different electrode assemblies use different active materials (e.g., lithium cobaltate, lithium iron phosphate, ternary lithium) and have different structural configurations to match specific performance requirements.
Data Source
AI summary
A battery cell includes a first electrode assembly and a second electrode assembly, where the first electrode assembly and the second electrode assembly differ in size and/or capacity so as to fit a structure of the battery cell.