Wiring Module Reinforcing Plate Mounting Recess
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Solution Overview
Problem
The existing methods for fixing flexible circuit boards to carrier trays in wiring modules, such as thermal welding, limit design freedom and complicate assembly due to the need for mounting holes and complex processes.
Innovation Solution
A wiring module configuration that includes a flexible printed circuit board, a reinforcing plate, and a protector with a mounting recess and engaging portions to securely attach and stabilize the reinforcing plate, allowing for easier assembly and design flexibility without the need for mounting holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal welding is used to fix the flexible circuit board to the carrier tray, then the flexible circuit board can be securely fixed, but mounting holes must be provided which limits the space for placing circuits and components
Solution Approach 1:
A reinforcing plate is introduced as an intermediary component between the flexible circuit board and the carrier tray. The flexible circuit board is attached to the reinforcing plate without requiring mounting holes, and the reinforcing plate is then mounted to the carrier tray via a mounting recess. This mediator allows secure fixing while preserving the full area of the flexible circuit board for circuit placement.
Solution Approach 2:
The fixing structure is segmented into three separate components: the flexible circuit board, the reinforcing plate, and the carrier tray with mounting recess. This segmentation allows each component to perform its specific function independently - the flexible circuit board maintains its full area for circuits, the reinforcing plate provides structural support and mounting interface, and the carrier tray provides positioning through the mounting recess.
2Reliability
If thermal welding processes are used to fix the flexible circuit board, then secure attachment is achieved, but the assembly work becomes complicated
Solution Approach 1:
The thermal welding process is replaced with a mechanical attachment system. The flexible circuit board is attached to the reinforcing plate using mechanical means (such as adhesive or mechanical fasteners on the rear surface), and the reinforcing plate is mechanically mounted to the carrier tray through the mounting recess structure. This substitution eliminates the need for thermal welding equipment and complex welding processes.
Solution Approach 2:
The reinforcing plate is pre-attached to the flexible circuit board before final assembly with the carrier tray. This preliminary action allows the flexible circuit board to be prepared and positioned without requiring immediate complex fixing operations, simplifying the overall assembly sequence.
3Reliability
If mounting holes are provided in the flexible circuit board for thermal welding, then secure fixing is achieved, but design freedom is limited
Solution Approach 1:
The reinforcing plate serves as a mediator that carries the mounting interface, separating the fixing function from the flexible circuit board itself. This allows the flexible circuit board to maintain its full design freedom for circuit placement while the reinforcing plate handles all mounting and positioning requirements through its integrated mounting holes and structure.
Data Source
AI summary
A wiring module is attached to a plurality of power storage elements and includes an FPC, a reinforcing plate attached to the FPC, and a protector for holding the FPC and the reinforcing plate. The FPC is electrically connected to electrode terminals of the plurality of power storage elements. The reinforcing plate has an attachment surface to which the FPC is attached. The protector is provided with a mounting recess where the reinforcing plate is mounted. The mounting recess includes a plurality of side surface portions for suppressing displacement of the reinforcing plate in a direction that is perpendicular to a plate thickness direction of the reinforcing plate and an engaging portion for engaging an end portion of the attachment surface and suppressing displacement of the reinforcing plate in the plate thickness direction.