Battery FPCB Side Connection Layout for Impact Buffering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices with flexible printed circuit boards face challenges in buffer functionality and space utilization due to V/W bending and S bending, which can lead to separation issues and reduced area for other components around the battery protection module.
Innovation Solution
The electronic device incorporates a flexible printed circuit board with specific bending configurations, including a 'U' shape and V/W bending portions, extending from the battery protection module to the main circuit board, enhancing buffer functionality and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V/W bending or S bending is used in the flexible printed circuit board, then buffer function is provided to prevent separation during impact, 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 with multiple bending portions (first, second, third, and fourth portions at different angles and positions). This spatial arrangement allows the FPCB to provide buffer function through vertical and angular displacement rather than horizontal occupation, thereby maintaining circuit board utilization area while ensuring impact protection
Solution Approach 2:
The flexible printed circuit board is divided into multiple distinct portions (first portion extending in second direction, second portion bent at angle, third portion extending in third direction, fourth portion extending in first direction). Each segment serves specific functional purposes: the first and fourth portions provide connection paths, while the second and third portions create buffer zones. This segmentation enables the FPCB to distribute stress across multiple points rather than concentrating it in a single bending area, providing effective buffer function while optimizing space utilization
2Reliability
If the flexible printed circuit board extends from the battery protection module, then electrical connection is achieved, but the risk of separation during impact increases
Solution Approach 1:
The flexible printed circuit board incorporates predetermined bending portions (second portion bent at angle, third portion extending in opposite direction) that create natural buffer zones before impact forces can transmit to the connection points. These pre-formed geometric features act as shock absorbers, dissipating impact energy through controlled deformation of the flexible material. The bending portions are strategically positioned to provide cushioning effect before stress reaches the electrical connection points, thereby preventing separation while maintaining reliable electrical connection
Solution Approach 2:
The flexible printed circuit board utilizes the inherent flexibility of thin FPCB material to its advantage. The thin, flexible nature of the circuit board allows it to deform elastically during impact events, absorbing shock forces without breaking or separating. The flexible material can bend and flex around the predetermined angles and directions, providing mechanical compliance that protects the rigid electrical connections at both the battery protection module and main circuit board interfaces
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.