EV Wireless Charging Timestamp Monitoring
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Solution Overview
Problem
Existing wired charging solutions for electric vehicles are inconvenient and prone to mechanical issues, safety hazards, and vandalism, while they also lack the ability to efficiently and safely transfer power without physical connectors.
Innovation Solution
A wireless power transfer system that uses induction coils to establish a magnetic field for charging electric vehicles, allowing for efficient and safe power transfer without physical connections, and includes a processor to manage charging cycles and generate timestamps for charging start and end times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wired charging connections with cables and connectors are used, then power transfer is reliable and controllable, but the system becomes inconvenient, cumbersome, and vulnerable to mechanical issues, safety hazards, and vandalism
Solution Approach 1:
The patent replaces the mechanical cable and connector system with a wireless electromagnetic field-based power transfer system. The transmitting pad generates an electromagnetic field that inductively couples with the receiving coil in the vehicle, eliminating mechanical connections entirely. This substitution resolves the contradiction by removing the mechanical wear and safety hazards of wired connections while maintaining reliable power transfer through electromagnetic coupling.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the power source and the vehicle battery. The transmitting pad creates an electromagnetic field that serves as the medium for power transfer, replacing the direct mechanical electrical connection. This intermediary approach allows power transfer without physical contact, improving convenience while maintaining reliability through field-based energy transfer.
2Ease of operation
If wireless power transfer is implemented, then charging convenience and safety are improved, but power transfer efficiency and control may be compromised
Solution Approach 1:
The patent implements a feedback mechanism where the controller monitors the charging state of the vehicle battery and adjusts the power transfer accordingly. The system receives status information from the vehicle about battery charge levels and uses this feedback to control the transmitting pad's power output, ensuring efficient energy transfer while preventing overcharging. This feedback loop maintains high efficiency despite the wireless interface.
Solution Approach 2:
The patent employs dynamic adjustment of the electromagnetic field parameters during charging. The controller can vary the power output, frequency, and other parameters of the transmitting pad based on real-time charging conditions and battery state. This dynamic control optimizes power transfer efficiency throughout the charging process, resolving the efficiency concern associated with wireless transfer.
3Device complexity
If charging duration is not monitored, then the system is simpler, but billing accuracy and grid management capabilities are reduced
Solution Approach 1:
The patent implements automatic timestamp generation and charging duration calculation without requiring manual intervention. The system automatically records start and end times of charging sessions and calculates duration for billing and grid management purposes. This self-service approach adds minimal complexity while providing precise measurement capabilities, as the system performs these functions autonomously as part of its normal operation.
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
The system provides convenient, reliable, and safe charging with reduced mechanical wear and exposure to environmental elements, enabling efficient energy transfer and potential Vehicle-to-Grid capabilities for power grid stabilization.
Implementation Method 1
A wireless power transfer system that uses induction coils to establish a magnetic field for charging electric vehicles
Data Source
AI summary
Systems, methods, and apparatus are disclosed for electric vehicle wireless charging. In one aspect, a method of transferring wireless power to an electric vehicle is provided, including initiating a charging cycle comprising at least one initialization state during which a wireless power link sufficient for charging is established between the wireless power transfer system and the electric vehicle and at least one charging state during which wireless power transfer from the wireless power transfer system to the electric vehicle is performed. The method further includes generating a first timestamp indicating a start time of the wireless power transfer in response to entering the at least one charging state and generating a second timestamp indicating an end time of the wireless power transfer.