Conductor Module Height Reduction via Segmented Fixing
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Solution Overview
Problem
Conductor modules for battery modules face challenges in reducing height while maintaining connection reliability, as stress at electrical connection points can lead to deteriorated connections due to relative movement between bus bars and film-like wiring members.
Innovation Solution
A conductor module design featuring a film-like wiring member with through-holes and a fixing member that restricts relative movement, ensuring secure mechanical connection between bus bars and the wiring member, thereby preventing stress and maintaining reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the plurality of bus bars and the voltage detector are fixed without using the accommodating member, then the height of the conductor module is reduced, but the connection reliability deteriorates due to stress generated in the electrical connection portion
Solution Approach 1:
The patent divides the fixing function from the electrical connection function by introducing through-holes in the wiring member and using separate fixing members (such as clips or fasteners) to mechanically secure the bus bars. This segmentation allows the electrical connection portion to remain free of mechanical stress while still achieving height reduction by eliminating the accommodating member.
Solution Approach 2:
The patent introduces fixing members as intermediary elements between the bus bars and the wiring member. These fixing members provide the mechanical attachment function without transmitting stress to the electrical connection portion, thus mediating between the need for secure fixation and the need to protect electrical connections from stress.
2Device complexity
If the bus bars are directly connected to the film-like wiring member at the electrical connection portion, then the structure is simplified, but stress causes relative movement and deteriorates connection reliability
Solution Approach 1:
The patent segments the functional zones by forming through-holes in specific regions of the wiring member, creating distinct areas for electrical connection and mechanical fixation. This allows the electrical connection portion to remain simple while adding fixation functionality through the through-holes and fixing members.
Solution Approach 2:
The patent moves the fixation function to a different spatial dimension by using through-holes that penetrate the wiring member thickness direction. This allows fixing members to attach bus bars from the sides or edges rather than at the electrical connection interface, separating the fixation function from the electrical connection in three-dimensional space.
Data Source
AI summary
A conductor module includes a wiring member, a plurality of bus bars, and a plurality of locking pieces. The wiring member is formed in a film shape with flexibility, and a plurality of wirings and through-holes are formed therein. The bus bar is electrically connected to one of two electrode terminals. The two through-holes are formed in a first opposing region opposing one end face between both end faces of the bus bar opposing each other in a width direction of the bus bar with an electrical connection portion where the bus bar and the wiring are electrically connected interposed therebetween when viewed from the width direction. The locking piece is formed integrally with the bus bar, is arranged in the through-hole, has a distal end positioned radially outward of the through-hole when viewed from an axial direction of the through-hole, and fixes the bus bar to the wiring member.