Inductive EV Charging Positioning Using Adaptive Signal References
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Solution Overview
Problem
Existing inductive charging methods for electric vehicles face challenges in achieving precise positioning due to fluctuations in electromagnetic signals caused by surrounding conditions, making it difficult to ensure reliable and standardized charging, especially across different manufacturers' systems.
Innovation Solution
A method that involves determining vehicle-specific and charging station-specific identification information, transmitting this data to a storage apparatus, and using the received positioning information to adapt process parameters for precise electromagnetic signal-based positioning, accounting for variations in vehicle and charging station combinations and surroundings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standardized LPE or LF positioning methods are used, then interoperability between charging systems is improved, but positioning reliability deteriorates due to signal fluctuations from surrounding conditions
Solution Approach 1:
The system performs preliminary actions by storing reference signal values from multiple surrounding conditions before actual positioning occurs. During positioning, these pre-stored reference values are retrieved and compared against current measurements, allowing the system to compensate for environmental variations without requiring real-time adaptation, thus maintaining both interoperability and reliability
Solution Approach 2:
The system implements feedback by continuously comparing current electromagnetic signal measurements against stored reference values from various surrounding conditions. When deviations are detected, the system uses this feedback to adjust positioning calculations, ensuring reliable positioning across different environments while maintaining standardized interoperable protocols
2Measurement precision
If additional modifications are made to infrastructure for positioning, then positioning precision is improved, but ease of operation deteriorates due to dependency on private owner willingness
Solution Approach 1:
The system achieves universal positioning capability by using the existing electromagnetic charging signals for dual purposes: both inductive charging and positioning. No separate positioning infrastructure is needed, as the charging coils themselves emit the signals used for positioning, eliminating dependency on private modifications while maintaining precision
Solution Approach 2:
The positioning system is self-service in that it uses the charging infrastructure's own electromagnetic signals for positioning purposes. The system automatically retrieves and compares signal values without requiring external positioning devices or private owner interventions, making deployment straightforward while achieving precise positioning
3Loss of time
If electromagnetic signal-based positioning is used, then positioning speed is improved, but measurement precision deteriorates due to signal dependency on surrounding conditions
Solution Approach 1:
The system performs preliminary measurements and stores reference signal values from multiple surrounding conditions before actual positioning occurs. During positioning, these pre-stored references enable rapid comparison and calculation, maintaining high positioning speed while compensating for environmental variations to ensure precision
Solution Approach 2:
The system implements feedback by comparing current electromagnetic signal measurements against stored reference values. When surrounding conditions cause signal variations, the feedback mechanism detects these deviations and adjusts positioning calculations accordingly, maintaining measurement precision without sacrificing the speed advantage of electromagnetic signal-based positioning
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 approach enables improved and adaptive positioning of electric vehicles on inductive charging stations, reducing errors and enhancing the efficiency of the charging process by accounting for specific vehicle and charging station combinations and surroundings, thus overcoming the limitations of existing methods.
Implementation Method 1
a weak magnetic field signal from the charging coils themselves is used for positioning
Data Source
AI summary
The invention relates to a method involving a vehicle or an inductive charging station for positioning the vehicle on the inductive charging station, at least having the method steps: determining vehicle-specific first identification information; determining charging station-specific second identification information; transmitting the first identification information and the second identification information to a storage apparatus; receiving positioning information, assigned to the combination of first identification information and second identification information, from the storage apparatus. The invention furthermore relates to a method involving a storage apparatus, having the method steps: receiving vehicle-specific first identification information and charging station-specific second identification information from a vehicle or a charging station; determining or updating positioning information with at least one item of information about a signal strength of at least one electromagnetic signal used to position the vehicle on the charging station; and transmitting the positioning information to the vehicle or to the charging station.