PCB Suppressor Diode Layout for Compact Overvoltage Protection
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Solution Overview
Problem
Conventional electronic protective devices for battery electric vehicles require a large amount of installation space due to the arrangement of diode pairs on a single mounting surface, which limits their compactness.
Innovation Solution
The device employs a two-layer printed circuit board with unidirectional and bidirectional suppressor diodes arranged on separate mounting surfaces, connected in series within diode pairs, utilizing via-in-pad technology for electrical and thermal connections, resulting in a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all suppressor diodes are arranged on a single mounting surface, then the device structure is simple, but the installation space requirement increases
Solution Approach 1:
The patent transitions from arranging all diodes on a single mounting surface (2D planar arrangement) to utilizing both mounting surfaces of a two-layer PCB (3D spatial arrangement). This dimensional change allows diodes to be distributed across multiple layers, effectively reducing the footprint area while maintaining structural manageability through standardized PCB assembly processes
2Area of stationary object
If diode pairs are formed with unidirectional and bidirectional suppressor diodes connected in series, then the space requirement is reduced, but the device complexity increases
Solution Approach 1:
The patent divides each diode pair into two distinct functional components: a unidirectional suppressor diode and a bidirectional suppressor diode. This segmentation allows each component to be optimized for its specific function and arranged on separate mounting surfaces, reducing overall space requirements while maintaining manageable circuit configuration through clear functional division
Data Source
AI summary
An electronic protective device for protecting electrical and/or electronic systems against overvoltage may include a printed circuit board (PCB) and a plurality of diode pairs connected in parallel. Each diode pair of the plurality of diode pairs may include a unidirectional suppressor diode and a bidirectional suppressor diode connected in series with the unidirectional suppressor diode. The PCB may have two mounting surfaces facing away from each other. The printed circuit board may include a plurality of conductor tracks. The unidirectional suppressor diode of each diode pair may be arranged on a first mounting surface of the two mounting surfaces of the printed circuit board. The bidirectional suppressor diode of each diode pair may be arranged on a second mounting surface of the two mounting surfaces of the printed circuit board.