Bi-Metallic Conversion Terminal for Dissimilar Metal Coupling
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Solution Overview
Problem
The transition between aluminum-based and copper-based electrical components in automotive wiring systems often results in galvanic corrosion due to the incompatibility of the two metals, leading to material degradation and reduced electrical contact.
Innovation Solution
A conversion terminal device is developed, comprising a body with layers of dissimilar metals (e.g., aluminum and copper) that are metallurgically bonded through cladding, featuring connector portions designed to couple with respective metal components, thereby preventing galvanic corrosion and ensuring electrical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If aluminum-based cable is used to reduce weight and cost, then weight and cost are reduced, but galvanic corrosion occurs at the transition to copper-based terminal
Solution Approach 1:
The patent introduces a bi-metallic terminal as an intermediary component between aluminum cable and copper-based equipment. This terminal contains both aluminum and copper layers, allowing it to connect to aluminum cable on one side and copper equipment on the other side, thereby mediating the transition and preventing direct galvanic corrosion between dissimilar metals.
Solution Approach 2:
The patent employs a bi-metallic composite terminal structure that combines aluminum and copper layers. This composite material approach allows the terminal to exhibit properties of both metals - electrical compatibility with aluminum cable and compatibility with copper equipment, while preventing galvanic corrosion through proper metallurgical bonding between the layers.
2Reliability
If copper-based terminal is used to ensure electrical compatibility, then electrical contact is maintained, but weight and cost increase
Solution Approach 1:
The bi-metallic terminal applies local quality by having different metal compositions in different regions or layers. The aluminum layer interfaces with aluminum cable to prevent galvanic corrosion, while the copper layer interfaces with copper equipment to ensure electrical compatibility. Each layer is optimized for its specific function.
Solution Approach 2:
The terminal uses a composite bi-metallic structure that combines aluminum and copper in a single component, reducing the need for separate heavy copper terminal while maintaining electrical compatibility through the copper layer.
3Device complexity
If direct connection between aluminum cable and copper terminal is made, then device complexity is reduced, but galvanic corrosion destroys materials
Solution Approach 1:
The bi-metallic terminal serves as a mediator between aluminum cable and copper equipment, eliminating the need for complex external corrosion protection systems. The terminal's internal bi-metallic structure handles the dissimilar metal transition internally, preventing galvanic corrosion without adding external complexity.
Solution Approach 2:
The patent extracts the corrosion protection function from the connection system by incorporating it directly into the terminal's bi-metallic structure. Instead of adding separate protection mechanisms, the harmful galvanic interaction is eliminated by taking out the direct dissimilar metal contact and replacing it with metallurgically bonded layers.
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 effectively reduces or prevents galvanic corrosion and maintains electrical contact between dissimilar metal components, enhancing the reliability and longevity of electrical connections while reducing material costs and weight.
Implementation Method 1
The first layer and the second layer are coupled together to form a body. In one embodiment, the first layer and the second layer are cladded together to form a bi-metallic body.
Implementation Method 2
a connection between dissimilar metals such as aluminum based cable and a copper based terminal can produce an unwanted galvanic corrosion. The conversion terminal device effectively reduces or prevents galvanic corrosion
Data Source
AI summary
In one aspect, a conversion terminal device for electrically coupling dissimilar metal components is provided. The device includes a body having a first layer coupled to a second layer. The first layer is formed from a first metal and the second layer is formed from a second metal different from the first metal. The body includes a first connector portion and a second connector portion. The first connector portion is configured to couple to a first electrical component made of the first metal, and the second connector portion is configured to couple to a second electrical component made of the second metal to facilitate electrically coupling the first electrical component and the second electrical component.