Movable Primary Coil for EV Charging Alignment
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Solution Overview
Problem
Existing charging stations for electric vehicles struggle to optimally position the primary coil relative to the secondary coil of the vehicle, especially when the vehicle is not centered or has varying heights, leading to inefficient energy transfer.
Innovation Solution
A charging station with a movably fastened primary coil that can be adjusted automatically by pivoting and translating along a rail, combined with a resilient telescopic device to compensate for lateral and height differences, ensuring optimal alignment with the secondary coil of the electric vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the primary coil is fixed in position, then the charging station structure is simple, but optimal alignment with the secondary coil cannot be achieved when the vehicle is not centered or has varying heights
Solution Approach 1:
The primary coil is made movable through a rail system that allows translation along the direction of travel and pivoting about a pivot axis. This dynamic positioning enables the coil to adapt to varying vehicle positions and heights, achieving optimal alignment without requiring complex active control systems.
Solution Approach 2:
The spring-loaded telescopic device automatically adjusts the primary coil's position and height in response to vehicle entry, compensating for parking tolerances and height variations without external intervention. The system self-regulates to maintain optimal coupling between primary and secondary coils.
2Reliability
If the primary coil is made movable to compensate for parking tolerances, then alignment precision is improved, but the device complexity increases
Solution Approach 1:
The rail-mounted primary coil can translate along the direction of travel and pivot about a pivot axis, providing two degrees of freedom for positioning. This mechanical flexibility ensures reliable charging by compensating for lateral and longitudinal parking tolerances.
Solution Approach 2:
The spring-loaded telescopic device changes the vertical position parameter of the primary coil automatically, adjusting height to match variations in vehicle suspension, tire pressure, or load conditions, thereby maintaining reliable coupling.
3Manufacturing precision
If the spring-loaded telescopic device is added to compensate for height differences, then vertical positioning accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The spring-loaded telescopic device dynamically adjusts the vertical position parameter of the primary coil, compensating for height variations caused by different vehicle designs, suspension conditions, or load states. This passive spring mechanism provides automatic height adaptation.
Solution Approach 2:
The telescopic device with spring loading automatically responds to vertical forces exerted by the vehicle, extending or retracting to maintain optimal coupling distance without requiring active sensors or actuators.
4Manufacturing precision
If the rail is made pivotable to accommodate lateral position variations, then lateral alignment is improved, but the mechanical complexity increases
Solution Approach 1:
The rail is designed to pivot about a pivot axis, providing rotational freedom that enables lateral repositioning of the primary coil. This simple mechanical degree of freedom allows the system to accommodate lateral parking tolerances and align with the vehicle's secondary coil.
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 precise positioning of the primary coil relative to the secondary coil, ensuring efficient energy transfer and accommodating parking tolerances and height variations, thereby optimizing the charging process.
Implementation Method 1
the primary coil being resiliently mounted on the rail in such a way that it can be pushed downwards by the electric vehicle when it enters the area of the primary coil
Implementation Method 2
a charging station (10) for the inductive charging of an electric vehicle (200)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates, inter alia, to a charging station (10) for inductively charging an electric vehicle (200). According to the invention, the charging station (10) has a movable primary coil (40) that can generate a magnetic field in order to charge the electric vehicle (200). The primary coil (40) is fixed in a movable manner such that the coil can be moved by the electric vehicle (200) and positioned relative to a secondary coil (220) of the electric vehicle (200) when the vehicle drives into the region of the charging station (10).