Battery Pack FPCB Fixation in Molded Protection Circuit Modules
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Solution Overview
Problem
Existing battery packs face reliability issues due to unstable fixation of flexible printed circuit boards, which can lead to electrical connectivity problems and manufacturing complexities.
Innovation Solution
Incorporating a molding part with a fixing part that securely inserts and connects the flexible printed circuit board to the protection circuit module, eliminating the need for separate adhesives and enhancing board stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate adhesive member or adhesive tape is used to attach the flexible printed circuit board to the protection circuit module, then the board can be fixed, but the manufacturing process becomes more complex and reliability is compromised due to unstable fixation
Solution Approach 1:
The patent integrates the fixation function directly into the molding part by forming a fixing protrusion that engages with the flexible printed circuit board. This combines the structural support function of the molding part with the fixation function that was previously provided by separate adhesive members, thereby eliminating additional components and simplifying the manufacturing process while improving fixation stability.
Solution Approach 2:
The molding part provides its own fixation capability through the integrated fixing protrusion, eliminating the need for external adhesive members. The fixing protrusion is formed as part of the molding process itself, allowing the structure to serve both its protective enclosure function and its fixation function simultaneously, reducing manufacturing steps and improving reliability.
2Ease of manufacture
If separate adhesive members are used to fix the flexible printed circuit board, then the board can be attached, but additional materials and steps are required increasing manufacturing complexity
Solution Approach 1:
The fixation structure is merged into the molding part itself through the fixing protrusion. This integration eliminates the need for separate adhesive members and reduces the total component count, directly addressing the issue of manufacturing complexity while maintaining effective fixation of the flexible printed circuit board.
Solution Approach 2:
The fixation function is extracted from the category of separate adhesive components and integrated into the main molding part structure. By incorporating the fixing protrusion directly into the molding part, the patent removes the need for additional adhesive members, thereby simplifying the manufacturing process and reducing component inventory requirements.
Data Source
AI summary
A battery pack includes a battery cell; an electrode tab coupled to the battery cell; a protection circuit module electrically connected to the battery cell that includes a circuit board and a molding part covering the circuit board; and a flexible printed circuit board electrically connected to the protection circuit module. The molding part includes a fixing part to which the flexible printed circuit board is fixed.