Flexible Printed Circuit Openings for Battery Module Alignment
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Solution Overview
Problem
Existing voltage detection circuits in battery modules require additional positioning means to prevent positional misalignment between plate-like connection portions and contact pads, leading to complex operations and potential misalignment issues.
Innovation Solution
A flexible printed circuit with inlet openings larger than protruding portions and narrower entrance openings that allow for easy alignment and connection of conductive members, reducing the need for additional positioning means and simplifying the connection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plate-like connection portions are arranged on contact pads for voltage detection, then electrical connection is achieved, but additional positioning means is required to prevent positional misalignment
Solution Approach 1:
The inlet opening and entrance opening configuration enables the connection structure to automatically perform positioning functions. The protruding portion inserted into the inlet opening is guided by the entrance opening to achieve precise alignment with the contact pad, eliminating the need for external positioning jigs or fixtures.
Solution Approach 2:
The inlet opening and entrance opening act as intermediary structures that facilitate the connection between the protruding portion and the contact pad. These openings provide a transition path that guides the protruding portion into proper alignment with the contact pad, mediating the positioning process without requiring additional positioning devices.
2Manufacturing precision
If precise positioning is achieved between contact pads and connection portions, then connection accuracy is improved, but operational complexity increases due to individual positioning requirements
Solution Approach 1:
The connection structure performs its own positioning function through the inlet opening and entrance opening configuration. When the protruding portion is inserted into the inlet opening, the entrance opening automatically guides it to the correct position on the contact pad, eliminating the need for separate positioning operations.
Solution Approach 2:
The inlet opening and entrance opening are pre-configured in the flexible printed circuit board to provide a guiding path. This preliminary structural arrangement ensures that when connection is made, the protruding portion is automatically positioned correctly without requiring prior positioning adjustments.
3Manufacturing precision
If positioning measures are taken to prevent misalignment, then connection accuracy is maintained, but the number of operations and process complexity increase
Solution Approach 1:
The structure itself provides the positioning function through its geometric configuration. The inlet opening and entrance opening work together to automatically align the protruding portion with the contact pad during the insertion process, eliminating the need for separate positioning steps and maintaining high assembly speed.
Solution Approach 2:
The positioning function and connection function are merged into a single integrated structure. The inlet opening and entrance opening simultaneously provide both the connection pathway and the positioning guidance, combining multiple functions into one structural element to simplify the overall process.
Data Source
AI summary
A flexible printed circuit includes a plurality of conductive paths to which connection protruding portions of connection protruding pieces protruding from conductive members to be connected to electrode terminals of power storage elements are to be connected. The flexible printed circuit includes a plurality of inlet openings that are larger in size than the external shapes of the connection protruding portions and into which the connection protruding portions can be inserted with a gap being formed around each protruding portion, and a plurality of entrance openings that are provided corresponding to the inlet openings, have a configuration in which the protruding portions can be moved thereinto from the inlet openings, and extend in the form narrower than the inlet openings. Each of the conductive paths includes a land that is located at an edge portion of the entrance opening and to which the connection protruding portion is to be connected.