Flexible Printed Circuit Wiring Member for Battery Connection Deviation
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Solution Overview
Problem
In eco-friendly vehicles, the use of flexible printed circuit boards for battery voltage detection is hindered by dimensional tolerances in batteries, leading to connection position deviations that cause twisting and unreasonable forces on the wiring member, compromising the wiring state.
Innovation Solution
A flexible printed circuit board wiring member with deformable branch sections and a second deflection portion that absorbs deviations in the straight section, ensuring reliable connections by adapting to dimensional tolerances through deformable cutouts and projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible printed circuit board is used as a wiring member to reduce weight, then the weight of the power supply device is reduced, but the wiring member is twisted and unreasonable force is applied to the wiring pattern due to connection position deviation
Solution Approach 1:
The wiring member incorporates deflection portions that can dynamically deform to accommodate connection position deviations. These deflection portions are designed to flex and adjust their position within a predetermined range, allowing the wiring member to adapt to dimensional tolerances of batteries while maintaining reliable electrical connections without twisting or applying unreasonable force to the wiring pattern.
Solution Approach 2:
The wiring member is designed with deflection portions that change their geometric parameters (position, angle) in response to connection position deviations. By allowing controlled changes in the shape and configuration of the deflection portions, the wiring member can compensate for dimensional variations in battery assemblies while maintaining electrical connectivity and preventing damage to the wiring pattern.
2Adaptability or versatility
If dimensional tolerances of batteries are accumulated when coupling multiple batteries, then the position of connection deviates, but the wiring member becomes twisted and unreasonable force is applied to the wiring pattern
Solution Approach 1:
The deflection portions are designed with dynamic deformation capabilities that allow them to adapt to connection position deviations caused by accumulated dimensional tolerances. The deflection portions can flex and adjust their configuration within a predetermined range, enabling the wiring member to accommodate variations in battery positions while preventing twisting and maintaining reliable wiring connections.
Solution Approach 2:
The wiring member incorporates deflection portions that serve as pre-designed compensation mechanisms for anticipated connection position deviations. By built-in these deflection portions beforehand, the wiring member can absorb and cushion the effects of dimensional tolerance accumulation without transmitting harmful forces to the wiring pattern, thereby maintaining wiring reliability.
3Reliability
If the branch section is made rigid to maintain wiring state, then the wiring pattern is protected, but the wiring member cannot accommodate connection position deviation
Solution Approach 1:
The wiring member is segmented into different functional portions: rigid sections that maintain wiring pattern integrity and deflection portions that accommodate connection position deviations. By dividing the wiring member into these distinct segments with different mechanical properties, the design protects the wiring pattern while allowing the deflection portions to flex and adapt to dimensional tolerances of battery connections.
Solution Approach 2:
Different portions of the wiring member are assigned different mechanical qualities: the sections carrying the wiring pattern are made rigid to protect the electrical connections, while the deflection portions are made flexible to accommodate position deviations. This local differentiation of material or structural properties allows simultaneous achievement of wiring protection and adaptability to dimensional variations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively maintains a good wiring state by absorbing connection position deviations, preventing twisting and unreasonable forces, and can be implemented at low cost by forming the second deflection portion with projections and holes.
Implementation Method 1
the branch sections have deflection portions which can be deformed in response to a displacement of the straight section in a longitudinal direction thereof
Data Source
AI summary
A wiring member is provided that can suppress an influence due to deviation of a position of connection as much as possible so as to maintain a good wiring state. The wiring member 11 is formed of a flexible printed circuit board to be connected to terminals of a plurality of batteries. The wiring member 11 includes a straight section 21 which is disposed along arrangement of aligned terminals, and a plurality of branch sections 22 which extend toward positions of connection to the respective terminals from the straight section 21 so as to be connected thereto. The branch sections 22 have deflection portions 32 which can be deformed in response to displacement of the straight section 21 in the longitudinal direction.