Compact Circuit Board Structure Using Segmented Conducting Wire Group Sheet
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Solution Overview
Problem
Conventional circuit board structures with large Flexible Printed Circuits (FPCs) covering bus bars are bulky and complex, making it difficult to create a compact design.
Innovation Solution
A circuit board structure featuring a conductive piece on a first circuit board with semiconductor elements, where specific terminals are connected via a reduced-size conducting wire group sheet, such as an FPC, to a second circuit board, allowing for a simpler and more compact layout by aligning terminals in the same direction and using an insulating film to adhere the conducting wire group sheet on the conductive piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the FPC is provided to cover approximately the entire surfaces of the pair of bus bars, then electrical connection is achieved, but the FPC becomes large and the electrical connection box becomes bulky
Solution Approach 1:
The FPC is divided into multiple separate FPCs, each covering only a portion of the bus bar surface. This segmentation allows each FPC to be smaller while collectively achieving the same electrical connection function, thereby reducing the overall size requirement and enabling a more compact electrical connection box.
Solution Approach 2:
Instead of providing a single large FPC that covers the entire bus bar surface uniformly, the solution uses multiple small FPCs that cover only specific local areas where electrical connection is needed. This local quality approach reduces the total FPC area while maintaining necessary connectivity.
2Reliability
If the FPC covers approximately the entire surfaces of the pair of bus bars, then electrical connection is achieved, but notches must be provided in the FPC according to terminal positions, making the FPC shape complex
Solution Approach 1:
By dividing the FPC into multiple separate smaller FPCs, each covering a specific portion of the bus bar, the need for complex notches in a single large FPC is eliminated. Each small FPC has a simpler, more regular shape that is easier to manufacture and assemble.
Solution Approach 2:
The problematic notches are extracted from the FPC design by using separate FPCs instead of one continuous FPC. This removes the complexity of cutting notches while maintaining the electrical connection function, as each FPC can be positioned independently without requiring cutouts.
Data Source
AI summary
Provided is a circuit board structure including a first circuit board having bus bars and a second circuit board arranged spaced apart from the first circuit board, multiple FET being arranged on the bus bars, and terminals of the multiple FETs being connected to the bus bars. The circuit board structure includes a conducting wire group sheet that covers a portion of the bus bar and is provided with multiple conducting wires that allow electricity to flow between gate terminals of the FETs and the second circuit board. The semiconductor element FETs, which are arranged side by side, are provided such that the gates terminals are arranged in the same direction with respect to the direction in which the semiconductor element FETs are arranged side by side.