Ground Contact Unit Switching for EV Charging
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Solution Overview
Problem
Existing vehicle battery charging systems require manual intervention and have complex electrical connections, leading to potential faulty contacts and increased costs due to the need for multiple electrical drive switches and cabling.
Innovation Solution
A ground contact unit with a plate-shaped base body, multiple potential layers, and switching units connected via switching lines, allowing for automatic electrical connection and disconnection of contact areas without individual cabling for each switching unit, reducing the number of required electrical drive switches and cabling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual electrical drive switches and cabling are provided for each switching unit, then reliable switching control is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
Multiple switching units that share the same switching state requirement are electrically connected in parallel to a single drive switch. This merging approach allows one drive switch to control multiple switching units simultaneously, reducing the total number of drive switches and cabling while maintaining reliable switching control for all connected switching units
2Ease of operation
If manual intervention is used for vehicle battery charging connection, then system simplicity is maintained, but automation and operational efficiency are reduced
Solution Approach 1:
The ground contact unit is equipped with switching units that can automatically switch between different potential layers based on vehicle presence detection and charging requirements. The system performs self-service by automatically establishing and terminating electrical connections without manual intervention, thereby achieving automation while maintaining ease of operation through automatic vehicle recognition
3Adaptability or versatility
If multiple potential layers are provided for different charging functions, then charging versatility is improved, but the number of required switching units and cabling increases
Solution Approach 1:
Switching units are designed to be multi-functional by connecting them to multiple potential layers through shared drive switches. A single switching unit can serve multiple charging functions by switching between different potential layers, thereby achieving charging versatility without proportionally increasing the number of switching units and cabling
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
Enables a simple, cost-effective, and automatic electrical connection between the vehicle and ground contact units, preventing faulty contacts and reducing component complexity while maintaining functionality.
Implementation Method 1
each switching unit is coupled to at least one of the contact areas such that the switching unit can electrically connect and interrupt the corresponding at least one contact area to the at least one potential layer assigned to the contact area
Data Source
AI summary
A ground contact unit for a vehicle battery charging system comprises a base body, at least one potential layer, a plurality of contact areas, a plurality of switching units and a plurality of switching lines by means of which the switching units can be actuated, wherein a plurality of switching units are provided on each of the switching lines. The switching lines are subdivided into at least two groups, and each of the switching units is provided on at least two switching lines from at least two different groups, so that the switching state of the switching unit depends on the signal state on its associated switching lines. Each switching unit is coupled to at least one contact area such that the switching unit can electrically connect and interrupt the corresponding at least one contact area to the at least one potential layer assigned to the contact area.A method of switching a contact area is also shown.