Circuit Board Shielding Element for Stable EMC Assembly
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Solution Overview
Problem
Existing EMC protective structures for electrical devices in vehicles are cumbersome to assemble, costly, and provide insufficient mounting stability, leading to inefficient production and inadequate electromagnetic interference protection.
Innovation Solution
A shielding element with deformable protrusions and elastic piece bodies that fit into recesses on the circuit board, allowing for stable pre-positioning and easy assembly, and incorporating welding parts for fixed mounting, reducing production costs and enhancing electromagnetic compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EMC shielding elastic pieces are pre-fixed to printed circuit boards by tooling, then electromagnetic protection is provided, but production processes become cumbersome and production costs increase
Solution Approach 1:
The shielding element performs self-positioning through its own deformable protrusions that elastically deform during assembly to fit into recesses on the circuit board, eliminating the need for external tooling fixtures and achieving self-service assembly
Solution Approach 2:
The shielding element incorporates deformable protrusions that dynamically change shape during the assembly process - deforming to pass through recesses and then recovering to create interference fits, enabling a simple assembly structure to achieve stable mounting
2Reliability
If EMC shielding elastic pieces are pre-fixed to printed circuit boards by tooling, then electromagnetic protection is provided, but production costs increase
Solution Approach 1:
The shielding element performs self-positioning through its own deformable protrusions that elastically deform during assembly to fit into recesses on the circuit board, eliminating the need for external tooling fixtures and achieving self-service assembly
Solution Approach 2:
The positioning and shielding functions are merged into a single integrated element - the shielding element itself contains the deformable protrusions that provide both electromagnetic shielding and self-positioning, eliminating separate positioning fixtures
3Productivity
If simple shielding structures are used, then production efficiency increases, but mounting stability becomes insufficient
Solution Approach 1:
The shielding element incorporates deformable protrusions that dynamically change shape during the assembly process - deforming to pass through recesses and then recovering to create interference fits, enabling a simple assembly structure to achieve stable mounting
Solution Approach 2:
The physical state of the protrusions changes during assembly - transitioning from a deformed state during insertion to a recovered state that creates interference fit, using parameter change to achieve both simple assembly and stable mounting
4Productivity
If simple shielding structures are used, then production efficiency increases, but electromagnetic protection becomes insufficient
Solution Approach 1:
The shielding element incorporates deformable protrusions that dynamically change shape during the assembly process - deforming to pass through recesses and then recovering to create interference fits, enabling a simple assembly structure to achieve stable mounting
Solution Approach 2:
The physical state of the protrusions changes during assembly - transitioning from a deformed state during insertion to a recovered state that creates interference fit, using parameter change to achieve both simple assembly and stable mounting
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
Simplifies assembly, reduces production costs, and improves EMC shielding effectiveness by providing stable mounting and enhanced electromagnetic isolation between high-voltage and low-voltage areas.
Implementation Method 1
the deformable protrusion of the plug-in part can be in interference fit with the circuit board
Implementation Method 2
EMC protective structures are usually provided around important components of electronic devices... the shielding element... improves EMC shielding effectiveness by providing stable mounting and enhanced electromagnetic isolation between high-voltage and low-voltage areas
Data Source
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Figure 3~5
Figure 6
AI summary
The present disclosure provides an electrical device, an electric drive assembly system and a vehicle. The electrical device includes: a housing; a circuit board, which is arranged in the housing and provided with a recess thereon; and a shielding element, which is arranged on the circuit board and abuts the housing, wherein the shielding element includes a first plug-in part and a second plug-in part capable of being inserted into a corresponding recess on the circuit board, the first plug-in part having a deformable protrusion protruding in a first direction transverse to a plug-in direction, and the second plug-in part having a deformable protrusion protruding in a second direction opposite to the first direction.