Battery Cell Terminal Housing Structure for Space-Saving Sealing
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Solution Overview
Problem
The challenge of increasing the energy density of battery cells in electric vehicles is hindered by the difficulty in optimizing the space utilization of terminal posts and insulating structures, which occupy significant volume and compromise the overall capacity and reliability of the battery.
Innovation Solution
A case assembly design with a first accommodating groove and a first extension platform for the terminal post, combined with an insulating sealing structure, allows for the integration of the fitting structure within the groove, thereby optimizing space utilization and enhancing structural strength and mounting reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal post and insulating structures are designed with sufficient structural strength and mounting reliability, then the reliability is improved, but the occupied space increases, reducing the volumetric energy density
Solution Approach 1:
The insulating sealing structure including the first fitting structure is nested within the first accommodating groove of the case wall. This nesting arrangement allows the insulating and sealing functions to be integrated into the existing case structure without occupying additional space that would otherwise be available for cell assembly, thereby improving volumetric energy density while maintaining reliable mounting and insulation
Solution Approach 2:
The design merges multiple functions into the first accommodating groove structure: it provides mechanical support for the terminal post, accommodates the insulating sealing structure, and ensures proper positioning. By combining these functions into a single integrated feature, the design eliminates the need for separate components, reducing overall occupied space while maintaining reliability
2Volume of moving object
If the case provides sufficient arrangement space for the cell assembly, then the volumetric energy density is improved, but the space for mounting the terminal post and insulating structures is reduced
Solution Approach 1:
The first accommodating groove is pre-formed in the case wall design, creating a dedicated space that anticipates the need for both terminal post mounting and insulating structure accommodation. This preliminary structural preparation ensures that subsequent assembly operations are simplified, as components are guided into their correct positions by the pre-designed groove geometry, maintaining ease of assembly while maximizing space utilization
Data Source
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AI summary
A housing assembly, a battery cell, a battery, and an electrical apparatus. The housing assembly comprises a housing, a terminal post, and an insulating and sealing structure. The housing comprises a first housing wall, a first accommodation groove is formed in the first housing wall, and a mounting through hole is formed in the bottom wall of the first accommodation groove. The first terminal post comprises a terminal post body and a first extending platform, the first extending platform being arranged on the first housing wall on the side where the first accommodation groove is formed. The insulating and sealing structure comprises a first matching structure, the first matching structure is matched between the first housing wall and the first extending platform, and at least part of the first matching structure is accommodated in the first accommodation groove.