Carbon Fiber Shielded Electrical Cable Weight Reduction
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Solution Overview
Problem
The weight of electrical cables in motor vehicles is a concern due to their numerous components, and existing solutions like copper shielding are heavy, while aluminum alternatives offer only partial weight reduction.
Innovation Solution
A shielded electrical line using a carbon fiber-plastic composite for electromagnetic shielding, combined with foamed plastic insulation and a non-metallic contact method via electrically conductive adhesive for grounding, reduces weight effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If copper wires are used for electromagnetic shielding, then shielding effectiveness is improved, but cable weight increases
Solution Approach 1:
The patent uses a composite material consisting of carbon fibers embedded in a plastic matrix for the shielding layer. This composite provides electromagnetic shielding effectiveness while significantly reducing weight compared to traditional copper wire screens. The carbon fibers conduct electromagnetic interference to ground through the plastic matrix, achieving shielding without the heavy metal construction.
Solution Approach 2:
The patent changes the material parameters from metallic copper wires to carbon fiber-reinforced plastic. This parameter change maintains the shielding function through the conductive properties of carbon fibers while dramatically reducing the density and overall weight of the shielding layer, directly resolving the contradiction between shielding effectiveness and weight.
2Weight of moving object
If aluminum conductors are used instead of copper, then cable weight is reduced, but electrical conductivity decreases
Solution Approach 1:
The patent employs a composite structure where carbon fibers provide the conductive pathway within a plastic matrix. This composite material achieves the necessary electrical conductivity for signal transmission while maintaining low weight, overcoming the limitations of aluminum conductors and providing both weight reduction and reliable electrical performance.
3Object-affected harmful factors
If traditional metal screening is used, then electromagnetic shielding is achieved, but fuel consumption increases due to weight
Solution Approach 1:
The carbon fiber-reinforced plastic shielding layer provides effective electromagnetic shielding while reducing cable weight. This weight reduction directly decreases the overall vehicle weight, leading to lower fuel consumption, thus resolving the contradiction between maintaining shielding effectiveness and reducing energy consumption.
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
This configuration results in a lighter cable with sufficient shielding, enabling reduced fuel consumption and improved vehicle performance by minimizing overall cable weight.
Implementation Method 1
The screen consists of carbon, with the electrical properties described above. The carbon is present, for example, in the form of fibers or threads
Implementation Method 2
The screen 3 is then exposed at this point. It can then be used according to the schematic representation in Fig. 3 be glued to a component 6 of the motor vehicle by means of an electrically conductive adhesive 5
Data Source
Figure 1~3
AI summary
An electrical conductor (L) is specified which has at least one electrical conductor (1) surrounded by insulation (2) and, in the case of a soft conductor, an electrically effective shield (3) is attached over the insulation (2) and is surrounded by a layer (4) of insulating material. The shield (3) consists of a plastic containing carbon fibers.