PCB Battery Groove Conductor Layout for Low-Impedance Connection
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Solution Overview
Problem
The use of dual batteries in terminal devices requires a low-impedance power cable connection between battery negative electrodes, which occupies a large area on the PCB, reducing space for other components.
Innovation Solution
A printed circuit board assembly with a groove area where batteries are positioned on opposite sides, and a conductor within this groove connects them, allowing the conductor to also serve as a bracket for other components, reducing the need for a separate power cable area and increasing space for other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steel sheet is used as a power cable to connect two battery negative electrodes, then the impedance is reduced, but the area occupied on the PCB increases
Solution Approach 1:
The patent merges the power cable function with the bracket structure by integrating the conductor into the bracket that supports the PCB. This combination allows the same structural element to serve dual purposes: providing mechanical support and conducting power between battery negative electrodes, thereby reducing the area occupied on the PCB while maintaining low impedance
Solution Approach 2:
The bracket is designed to perform multiple functions simultaneously: it provides structural support for the PCB cavity and serves as the power cable connecting the two battery negative electrodes. This multi-functionality eliminates the need for a separate dedicated power cable, thus reducing the area proportion on the PCB
2Reliability
If a wide steel sheet is used to reduce impedance, then the power cable performance is improved, but the area for other components is reduced
Solution Approach 1:
The power cable function is merged with the bracket structure, allowing the conductor to be integrated into the existing bracket design. This eliminates the need for additional wide steel sheets dedicated solely to power transmission, thereby preserving PCB area for other components while maintaining adequate power cable performance through the integrated conductor design
3Ease of operation
If a separate power cable is used to connect batteries, then the connection is simplified, but the PCB area is occupied
Solution Approach 1:
The connection function is merged with the bracket structure, where the bracket itself serves as the connection path between battery negative electrodes. This integration simplifies the overall design by eliminating separate connection components while reducing PCB area occupation, as the connection is achieved through the structural bracket rather than additional mounted components
Data Source
Figure 1~2(b)
Figure 3(a)~3(b)
Figure 4(a)~4(c)
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.