PCB Battery Conductor Layout for Low-Impedance Space Saving
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Solution Overview
Problem
The increasing use of dual batteries in terminal devices requires a power cable connecting their negative electrodes with lower impedance, often achieved with a wide steel sheet on the PCB, which occupies a large area, limiting space for other components.
Innovation Solution
A PCB assembly with a groove area where the power conductor is placed, acting as both a connection between batteries and a bracket for other components, reducing the area needed for the power cable and increasing space for other components by reusing the conductor as a bracket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wide steel sheet is used as power cable to reduce impedance, then the impedance of power cable is reduced, but the area occupied on PCB is increased
Solution Approach 1:
The first conductor is designed to serve dual functions: as a power cable connecting the negative electrodes of the first and second batteries, and as a bracket supporting the target component. This multi-functionality eliminates the need for separate power cable and bracket structures, thereby reducing the total area occupied on the PCB while maintaining low impedance requirements.
2Reliability
If a wide steel sheet is used as power cable, then the impedance requirement is met, but the area for other components is reduced
Solution Approach 1:
The patent merges the power cable function and bracket function into a single first conductor structure. By combining these two previously separate elements, the design reduces the total space required on the PCB, thereby increasing the area available for other components while still meeting the impedance requirements for dual-battery power supply.
3Strength
If a separate bracket is added to support the target component, then the component is secured, but the area occupied on PCB is increased
Solution Approach 1:
The first conductor is designed to simultaneously perform electrical connection and mechanical support functions. By making the power cable itself serve as the bracket, the design eliminates the need for additional support structures, thereby maintaining the support capability for the target component while reducing the total area occupied on the PCB.
Data Source
AI summary
Embodiments of this application are applied to the field of terminal technologies, and provide a PCB assembly and an electronic device, where the PCB assembly includes a PCB, a first conductor, a first battery, and a second battery. The PCB includes a groove area. The first battery and the second battery are disposed on different sides of the groove area. The first conductor is disposed in the groove area, and the first conductor is configured to connect the first battery and the second battery. That is, in the embodiments of this application, the first battery and the second battery are connected by using the first conductor in the groove area, which prevents a power cable connecting the first battery and the second battery from occupying an area on the PCB, thereby increasing an area in which other components can be installed on the PCB.