EV Wireless Charging Station Magnetic Field Segmentation
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Solution Overview
Problem
Existing wireless charging systems for electric vehicles face challenges in efficiently and effectively identifying and pairing with charging stations, leading to inconvenient and cumbersome wired charging solutions.
Innovation Solution
The system uses a magnetic field with varying intensity levels to transmit both power and information signals, allowing electric vehicles to uniquely identify charging stations and establish communication links for guidance and alignment, separate from the power transmission frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless charging systems use a single magnetic field for both power transmission and information signaling, then the system complexity is reduced, but the power transmission efficiency and signal clarity are compromised
Solution Approach 1:
The patent segments the magnetic field transmission into two distinct operational modes: a first intensity level for power transmission and a second intensity level for information signaling. This segmentation allows each mode to operate independently with optimized parameters, preventing interference between power and data channels while maintaining system simplicity.
Solution Approach 2:
The system dynamically adjusts the intensity level of the magnetic field based on the operational phase. During power transmission, the field operates at a first intensity level optimized for energy transfer. During identification and pairing, it switches to a second intensity level optimized for signal clarity. This dynamic adjustment resolves the contradiction by allowing the system to have both simplicity and reliability at different times.
2Ease of operation
If electric vehicles navigate to find charging stations manually, then the vehicle has full control over the selection process, but the charging process becomes time-consuming and inconvenient
Solution Approach 1:
The system performs preliminary identification and pairing actions automatically before the vehicle begins charging. The magnetic field provides identification signals that allow the vehicle to automatically detect and pair with the charging station in advance, eliminating the need for manual navigation and selection during the charging process.
Solution Approach 2:
The vehicle and charging station perform self-identification and self-pairing through automatic communication via the magnetic field. The vehicle automatically detects the charging station's unique identifier and establishes communication without driver intervention, making the system serve itself rather than requiring manual operation.
3Measurement precision
If charging stations use high intensity magnetic fields for identification signals, then the signal clarity improves, but the safety risks and energy consumption increase
Solution Approach 1:
The patent changes the intensity parameter of the magnetic field based on the operational requirement. For identification and signaling, it uses a second intensity level that is lower than the first intensity level used for power transmission. This parameter change ensures signal clarity for detection while maintaining safety and reducing energy consumption during the identification phase.
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 efficient and convenient wireless charging by allowing electric vehicles to automatically identify and align with charging stations, reducing the need for manual intervention and improving safety and reliability.
Implementation Method 1
a transmitter comprising one or more coils configured to provide wireless power via a magnetic field
Implementation Method 2
the one or more coils further configured to provide an information signal via the magnetic field
Data Source
AI summary
Systems, methods, and apparatus are disclosed for communicating between a charging station and an electric vehicle. In one aspect, a method of pairing a charging station with an electric vehicle is provided, including providing wireless power via a magnetic field having a first intensity level that is sufficient to charge or power the electric vehicle, providing an information signal via the magnetic field when the magnetic field is set at a second intensity level that is lower than the first intensity level, the information signal uniquely identifying the charging station from a plurality of charging stations, communicating with the electric vehicle via a communication link that is different from the magnetic field, communicating comprising communicating with the electric vehicle parking guidance information to the location of the charging station, and establishing the communication link based at least in part on the information signal provided via the magnetic field.