Wiring Module Busbar Accommodation for Compact Battery Packs
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Solution Overview
Problem
Conventional wiring modules for electricity storage element groups are difficult to miniaturize due to the presence of auxiliary walls, which increase the distance between partition walls and hinder size reduction.
Innovation Solution
The design incorporates accommodating portions with first and second adjoining walls, where the second adjoining wall has openings to house auxiliary walls, and reinforcing ribs are added to maintain structural integrity, allowing for reduced distances between adjacent accommodating portions and connectable units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If auxiliary walls are added to partition walls for insulation and reinforcement, then the reliability and strength are improved, but the distance between adjacent partition walls increases, making it difficult to reduce the size of the wiring module
Solution Approach 1:
The auxiliary wall is nested within the opening formed in the second adjoining wall of the adjacent accommodating portion. This allows the auxiliary wall to be accommodated within the space already defined by the partition structure, eliminating the need for additional space between partition walls while still providing the necessary insulation and reinforcement functions.
Solution Approach 2:
The auxiliary wall extends from the first adjoining wall in a direction toward the second adjoining wall, utilizing the third dimension (depth/thickness) of the partition structure. This dimensional approach allows the auxiliary wall to provide insulation and reinforcement without increasing the planar footprint or distance between adjacent partition walls.
2Volume of moving object
If openings are formed in the second adjoining wall to accommodate auxiliary walls, then the distance between adjacent accommodating portions is reduced, but the strength of the second adjoining wall may decrease
Solution Approach 1:
The second adjoining wall is segmented by forming openings in it to accommodate the auxiliary walls. This segmentation allows the wall to be divided into solid portions that maintain structural strength and opening portions that enable space reduction. The solid portions between openings continue to provide structural support.
Solution Approach 2:
The auxiliary wall is nested within the opening of the second adjoining wall, allowing the opening to serve a dual purpose: reducing the distance between adjacent accommodating portions while the nested auxiliary wall provides the necessary insulation and reinforcement without compromising overall structural integrity.
3Volume of moving object
If the distance between adjacent partition walls is reduced to minimize wiring module size, then the volume is reduced, but it becomes difficult to accommodate auxiliary walls for insulation and reinforcement
Solution Approach 1:
The auxiliary wall is nested within the opening of the second adjoining wall, allowing it to be accommodated within the compact space between adjacent partition walls. This nesting arrangement ensures that the auxiliary wall can provide its insulation and reinforcement functions even when the distance between partition walls is minimized.
Solution Approach 2:
The auxiliary wall utilizes the depth dimension by extending from the first adjoining wall toward the second adjoining wall, allowing it to provide insulation and reinforcement functions within the limited space between adjacent partition walls without requiring increased planar distance.
Data Source
AI summary
A wiring module to be attached to an electricity storage element group in which a plurality of electricity storage elements having electrodes are lined up includes a plurality of busbars to be connected to the electrodes and a plurality of accommodating portions in which the busbars are respectively accommodated. Each of the accommodating portions has an accommodating wall that is disposed around the busbar, and the accommodating wall includes a first adjoining wall and a second adjoining wall opposing the first adjoining wall. The first adjoining wall of one accommodating portion and the second adjoining wall of another accommodating portion are arranged adjoining each other. The first adjoining wall has a first locking portion that locks the busbar and an auxiliary wall that protrudes toward the second adjoining wall and covers the first locking portion from the second adjoining wall side. The second adjoining wall has an opening in which the auxiliary wall is accommodated.