Battery Cell Terminal Groove Layout for Higher Energy Density
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Solution Overview
Problem
Current battery cells face challenges in increasing energy density, which limits the endurance mileage of electric vehicles.
Innovation Solution
The battery cell design incorporates a housing assembly with a first post terminal featuring an accommodating part, such as a groove, to reduce the weight and space occupied by conductive parts, allowing for a larger active substance-coated part and improved electrolyte accommodation, thereby enhancing energy density and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the conductive part is accommodated in the accommodating part of the first post terminal, then the space occupied by the conductive part in the housing is reduced and gravimetric energy density is improved, but the structural complexity of the post terminal increases
Solution Approach 1:
The conductive part is nested within the accommodating part of the first post terminal, allowing the conductive part to occupy the internal space of the post terminal structure. This nesting arrangement reduces the space required for the conductive part in the housing while maintaining structural integrity, thereby improving gravimetric energy density without significantly increasing overall complexity.
Solution Approach 2:
The first post terminal is designed with multi-functionality by incorporating both the terminal function and the accommodating part for the conductive part. This universal design allows the post terminal to serve dual purposes: electrical connection and space optimization, reducing the need for separate structural components and thereby improving energy density while controlling complexity.
2Volume of moving object
If the conductive part is accommodated in the accommodating part of the first post terminal, then the volumetric energy density of the battery cell is improved, but the manufacturing complexity increases
Solution Approach 1:
The battery cell structure is segmented into distinct functional zones, with the accommodating part specifically designated for the conductive part. This segmentation allows for optimized space utilization and volumetric energy density, while the modular nature of the design facilitates standardized manufacturing processes and assembly procedures.
Solution Approach 2:
The accommodating part is pre-formed as an integral feature of the first post terminal during manufacturing. This preliminary action ensures that the conductive part has a predetermined accommodation space, simplifying the assembly process and reducing manufacturing complexity despite the enhanced volumetric energy density configuration.
3Weight of moving object
If the first post terminal is provided with an accommodating part, then the weight of the first post terminal is reduced, but the device complexity increases
Solution Approach 1:
The accommodating part is extracted as a distinct functional feature from the traditional post terminal design. By creating a dedicated space within the post terminal structure, the design removes the need for separate support structures or additional components, thereby reducing overall weight while maintaining manageable device complexity through functional integration.
Data Source
AI summary
A battery cell comprises: a casing assembly and a battery cell assembly, wherein the casing assembly comprises a casing and a first terminal arranged on the casing; and the battery cell assembly comprises an active-material coated portion and a conductive portion, the active-material coated portion being accommodated in the casing, the conductive portion being used for electrically connecting to the active-material coated portion and the first terminal, the first terminal being provided with an accommodating portion, and the conductive portion being at least partially accommodated in the accommodating portion.