Enclosure Frame Sealing for Corrosion-Resistant PCB Components
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Solution Overview
Problem
Electronic components in high-power circuit boards, such as those in charging piles for electric vehicles, are prone to corrosion due to exposure during air-cooled heat dissipation, especially at the pins and components that protrude above the board surface, leading to reduced service life.
Innovation Solution
The use of an enclosure frame that encloses the electronic component, with a cavity or open end, allowing for sealing with a sealant to protect the pin and component from corrosion, and incorporates a heat sink for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air-cooled heat dissipation is performed on the circuit board, then heat dissipation efficiency is improved, but the circuit board and electronic components are exposed to contaminants causing corrosion
Solution Approach 1:
The patent applies conformal coating, a thin film protective layer, to cover the circuit board surface and electronic components. This coating forms a barrier that prevents contaminants from directly contacting and corroding the components while allowing the air-cooled heat dissipation system to function effectively beneath the protective layer
2Temperature
If a gap is reserved between the electronic component body and circuit board to extend heat conduction path, then heat impact on component body is reduced, but the pin becomes exposed and more easily corroded
Solution Approach 1:
The conformal coating is applied to cover the exposed pin that extends into the gap between the electronic component body and circuit board. This thin film protective layer prevents contaminants from corroding the pin while maintaining the necessary gap for heat conduction path extension
3Object-affected harmful factors
If conformal coating is applied to cover all surfaces, then protection against contaminants is improved, but it is difficult to ensure proper coating on protruding surfaces and corners
Solution Approach 1:
The electronic component body is positioned and fixed to the circuit board before applying the conformal coating. This preliminary positioning ensures that the coating can be applied uniformly to all accessible surfaces including corners and edges, while the protruding portions of the component body naturally guide the coating application process
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 enclosure frame effectively seals the pin and component, preventing corrosion and extending the service life of the circuit board while maintaining efficient heat dissipation.
Implementation Method 1
heat dissipation processing is usually performed on these circuit boards in an air-cooled heat dissipation manner
Implementation Method 2
extend a heat conduction path between the electronic component body and the pad
Data Source
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AI summary
This application relates to the field of electronic device technologies, and provides an electronic component with an enclosure frame, a circuit board with an electronic component, and an electronic device, to effectively protect the circuit board from being corroded, thereby prolonging a service life of the electronic device. This application is applied to a charging pile for charging a new energy electric vehicle. An electronic component (32) with an enclosure frame includes an enclosure frame (33) and an electronic component (32). The enclosure frame (33) defines a cavity (34) that is closed or that has one open end; when the electronic component (32) with an enclosure frame is connected to a circuit board (3), the enclosure frame (33) and the circuit board (3) can define a cavity (34) that is closed or that has one open end; when the electronic component (32) with an enclosure frame is connected to a circuit board (3), the enclosure frame (33) and another enclosure frame (33) of another electronic component (32) with the another enclosure frame can define a cavity (34) that is closed or that has one open end; or when the electronic component (32) with an enclosure frame is connected to a circuit board (3), the enclosure frame (33), the circuit board (3), and another enclosure frame (33) of another electronic component (32) with the another enclosure frame can define a cavity (34) that is closed or that has one open end. The electronic component (32) includes an electronic component body (321) and a pin (322).