Segmented Through-Pipe Battery Assembly for Fastening Rigidity
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Solution Overview
Problem
The reduction of member size in battery assemblies for vehicles affects the size and rigidity of through pipes, compromising the fastening force and safety of the battery assembly to the vehicle body.
Innovation Solution
A battery assembly design with a through pipe comprising a first, second, and third through members, where the second member has a wider internal peripheral surface than the first, and a third member has a wider external peripheral surface than the second, maintaining rigidity and fastening force despite reduced member width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the size of the member dividing the internal space is reduced, then the battery capacity-to-weight ratio increases and space for auxiliary battery is secured, but the size and rigidity of the through pipe penetrating the member deteriorates
Solution Approach 1:
The through pipe is divided into multiple segments (first through member, second through member, third through member) that can be assembled together. This segmentation allows each segment to be optimized independently - the second through member provides structural support and rigidity while the overall assembly maintains a compact profile suitable for reduced member sizes in battery assemblies.
Solution Approach 2:
The through pipe structure uses nested arrangement where the second through member is positioned between the first and third through members, with varying internal peripheral surface widths. This nested configuration allows the through pipe to maintain structural integrity and rigidity while occupying minimal space, enabling reduced member size in the battery assembly.
2Productivity
If the size of the member dividing the internal space is reduced, then the battery capacity-to-weight ratio increases, but the fastening force of the through bolt deteriorates
Solution Approach 1:
The second through member is designed with a wider internal peripheral surface width compared to the first and third through members. This local quality enhancement concentrates structural strength and fastening force at the critical middle section where the through bolt engages, ensuring adequate fastening capability while allowing the overall member size to be reduced for improved battery capacity-to-weight ratio.
3Volume of moving object
If the member size is reduced to increase battery capacity-to-weight ratio, then space efficiency improves, but the through pipe structure becomes insufficient
Solution Approach 1:
The through pipe employs a dynamic design where the internal peripheral surface width varies along its length, with the second through member having a wider width. This dynamic configuration optimizes the strength-to-volume ratio, providing structural sufficiency and reliability while minimizing the overall volume of the member to increase battery capacity-to-weight ratio.
Data Source
AI summary
A battery assembly includes a housing in which a battery module is accommodated, members dividing an internal space of the housing, a through pipe penetrating the inside of each of the members on one point of the member, and a through bolt inserted into the through pipe.