Battery FPCB Side Connection Layout for PCB Space and Impact Buffering
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Solution Overview
Problem
Existing electronic devices with flexible printed circuit boards (FPCBs) face challenges such as the need for holes or openings for battery protection modules, and reduced space for other elements due to S bending, which affects the utilization area of the main circuit board.
Innovation Solution
The electronic device incorporates a flexible printed circuit board with a specific bent structure, including a first portion extending from the battery protection module, a second portion bent in a 'U' shape, a third portion extending in an opposite direction, a fourth portion extending back towards the main circuit board, and a connector connected to the main circuit board, allowing for efficient power transfer and reduced stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible printed circuit board includes S bending, then the buffer function is improved, but the area for utilization of the main circuit board is reduced
Solution Approach 1:
The flexible printed circuit board transitions from a planar configuration to a three-dimensional structure by extending in multiple directions (first direction perpendicular to the battery protection module, second direction toward the main circuit board, and third direction opposite to the second direction). This multi-directional extension allows the FPCB to provide buffering functionality while occupying less area on the main circuit board, as the circuit board可以利用 the vertical and lateral spaces rather than requiring extensive planar space.
2Reliability
If the flexible printed circuit board includes V/W bending, then the buffer function is improved, but holes or openings are required in the electronic device
Solution Approach 1:
The flexible printed circuit board itself serves as the buffering structure through its flexibility and multi-directional extension, eliminating the need for separate V/W bending structures or holes in the electronic device housing. The FPCB's ability to extend in multiple directions provides the necessary buffer function while maintaining a simpler overall device structure without requiring additional openings or complex housing modifications.
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing, a main circuit board, a battery, a battery protection module disposed on one side surface of the battery, a protective holder that surrounds at least part of the battery protection module, and a flexible printed circuit board that extends from one side surface of the battery protection module and that is connected to the main circuit board. The flexible printed circuit board includes a first portion extending from the battery protection module in a second direction perpendicular to a first direction toward the main circuit board, a second portion extending from the first portion while being bent, a third portion extending from the second portion in a third direction opposite to the second direction, a fourth portion extending from the third portion in the first direction, and a connector connected to an end portion of the fourth portion and connected to the main circuit board.