Integrated PCB Shielding for High Voltage Motor Vehicle Systems
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Solution Overview
Problem
High voltage printed circuit boards in motor vehicles require significant installation space due to the need for separate low voltage boards for signal processing, which compromises electromagnetic compatibility and efficiency.
Innovation Solution
A single-piece printed circuit board integrating a high voltage section with a high current conductor and a low voltage section featuring shielding layers to isolate the signal processing device, eliminating the need for separate boards and optimizing space usage while maintaining electromagnetic compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate low voltage boards are used for signal processing, then electromagnetic compatibility is ensured, but installation space increases significantly
Solution Approach 1:
The patent combines the high voltage section and low voltage section into a single integrated printed circuit board. The low voltage section includes a signal processing device that is embedded between two shielding layers, which are positioned adjacent to the high voltage section. This merging eliminates the need for separate spaced-apart low voltage circuit boards while maintaining electromagnetic compatibility through the shielding structure.
Solution Approach 2:
The patent introduces shielding layers as an intermediary between the high voltage section and the low voltage section. These shielding layers act as a mediator that blocks electromagnetic interference from the high voltage section from reaching the sensitive signal processing device in the low voltage section, thereby ensuring electromagnetic compatibility while allowing close integration of both sections on the same board.
2Power
If high current conductors are embedded in the circuit board, then current carrying capacity increases, but electromagnetic interference to sensitive devices increases
Solution Approach 1:
The shielding layers serve as an intermediary that protects the signal processing device from electromagnetic interference generated by the high current conductor in the high voltage section, allowing the high current conductor to be embedded in the circuit board for high power transmission without harmful interference to sensitive devices.
Solution Approach 2:
The patent applies different structural qualities to different sections of the circuit board: the high voltage section contains the high current conductor for high power transmission, while the low voltage section contains the signal processing device protected by shielding layers. This local differentiation allows each section to be optimized for its specific function while minimizing interference between them.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for a space-saving arrangement of high current conductors and signal processing devices, ensuring electromagnetic compatibility and reducing installation space requirements, particularly in motor vehicles with on-board high voltage electrical systems.
Implementation Method 1
a low voltage section having two shielding layers to shield the low voltage section from the high voltage section
Data Source
AI summary
A printed circuit board includes a high voltage section, a high current conductor which is arranged in the high voltage section, and a low voltage section which is separated from the high voltage section. For this purpose, the low voltage section has shielding layers which shield the low voltage section from the high voltage section. A signal processing device is embedded between the shielding layers.