Dual Electrode Assembly Battery Cell Layout for Higher Energy Density
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Solution Overview
Problem
Current battery technologies face challenges in maximizing energy density due to the space occupation and structural requirements of traditional battery cells, which limits the capacity and efficiency of batteries in electric vehicles and other devices.
Innovation Solution
The design of a battery cell with a housing accommodating two electrode assembly groups arranged along a direction, with electrode terminals on opposite walls, allowing independent operation and reducing space usage, thereby increasing energy density and reducing the number of cells needed for the same energy output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional battery cells use separate housings for each electrode assembly, then structural stability is maintained, but space utilization decreases and energy density is reduced
Solution Approach 1:
The patent merges multiple electrode assemblies into a single housing, forming an electrode assembly group. This consolidation eliminates the need for separate housings for each electrode assembly, reducing overall structure complexity and improving space utilization. The merged structure allows multiple electrode assemblies to share common housing walls, tabs, and connection structures, directly increasing energy density while maintaining structural integrity.
Solution Approach 2:
The housing in the patent serves multiple functions simultaneously: it provides structural containment for multiple electrode assemblies, acts as a common barrier against external environment, serves as a mounting structure for multiple tabs, and provides a unified connection interface for the electrode assembly group. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure.
2Quantity of substance
If electrode assemblies are arranged to increase battery cell height, then capacity increases, but internal resistance increases due to longer current paths
Solution Approach 1:
The patent transitions from a single vertical stack arrangement to a multi-dimensional layout where electrode assemblies are arranged both vertically and horizontally within the housing. This spatial redistribution optimizes current paths by providing multiple parallel conduction routes, reducing the effective length of current paths while maintaining increased capacity through additional electrode assemblies.
Solution Approach 2:
The electrode assembly group is segmented into multiple independent electrode assemblies arranged in specific patterns. This segmentation allows current to be distributed across multiple parallel paths rather than flowing through a single long path, reducing internal resistance while maintaining the capacity benefits of multiple electrode assemblies.
3Reliability
If multiple electrode assembly groups are placed in separate housings, then operational independence is achieved, but space efficiency decreases
Solution Approach 1:
The patent nests multiple electrode assemblies within a single housing structure, with each assembly grouped together while sharing common housing resources. This nested arrangement allows operational independence of individual electrode assemblies to be maintained while achieving high space efficiency through shared housing walls, tabs, and connection structures.
Data Source
AI summary
A battery cell includes a housing; and a first electrode assembly group and a second electrode assembly group that are accommodated within the housing, where the first electrode assembly group and the second electrode assembly group are arranged along a first direction, the first electrode assembly group and the second electrode assembly group each include at least one electrode assembly, and electrode terminals of the first electrode assembly group and electrode terminals of the second electrode assembly group are respectively located on two walls of the housing that are disposed opposite along the first direction.