Hybrid EV Charging Device With Inductive Converter
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Solution Overview
Problem
Existing inductive charging systems for electric vehicles face challenges such as the need for precise alignment of coils, large and costly components, electromagnetic interference issues, and limited availability of charging terminals, which hinder the adoption of wireless charging solutions.
Innovation Solution
A hybrid charging system that includes a kit with a wireless inductive energy transfer system capable of restructuring energy into a 230 V-50 Hz signal, allowing for both wireline and inductive charging, and featuring a converter to match the energy characteristics of the mains power source, enabling flexible and adaptable charging solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inductive charging is used to eliminate extension cables, then ease of operation is improved, but device complexity increases due to the need for primary and secondary coils with precise alignment requirements
Solution Approach 1:
The patent introduces an intermediary device (the portable inductive charging unit with integrated coil and power electronics) that mediates between the power source and the vehicle battery. This intermediary handles the complexity of coil alignment and power conversion internally, presenting a simple user interface while managing the technical complexity through its integrated design.
Solution Approach 2:
The inductive charging system is designed to be universally applicable to different vehicle types and charging scenarios. The portable unit can serve multiple functions: it can charge different vehicle models, work with various power sources, and adapt to different parking positions, thereby reducing operational complexity despite the underlying technical complexity.
2Ease of operation
If the distance between primary and secondary inductors is increased to provide flexibility, then ease of operation is improved, but power transfer efficiency deteriorates due to weak coupling
Solution Approach 1:
The system employs dynamic adjustment of operating parameters (such as frequency and power level) based on the detected distance and coupling condition between coils. When the distance increases, the system dynamically adapts its parameters to maintain efficient power transfer, thereby preserving both operational flexibility and energy efficiency.
Solution Approach 2:
The system incorporates prior cushioning by pre-adjusting power levels and having backup power sources ready. When coupling becomes weak due to increased distance, the system has already prepared compensatory measures (increased power output, alternative charging paths) to prevent efficiency deterioration before it occurs.
3Object-generated harmful factors
If high frequency is used for inductive charging to avoid audible interference, then object-generated harmful factors are reduced, but manufacturing precision requirements increase for the power generator
Solution Approach 1:
The system changes the operating frequency parameter to fall within the optimal range (16-150 kHz) that avoids audible interference while maintaining efficient power transfer. This parameter selection balances the reduction of harmful acoustic effects with the practical constraints of manufacturing precision for power electronic components.
4Adaptability or versatility
If inductive charging terminals are made widely available, then adaptability is improved, but loss of substance increases due to the infrastructure required
Solution Approach 1:
Instead of bringing the heavy infrastructure (primary coils and power systems) to fixed locations, the patent inverts the approach by making the inductive charging capability portable and vehicle-side. This inversion reduces the need for extensive fixed infrastructure while maintaining high adaptability, as the charging unit can be moved to different locations as needed.
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 versatile and adaptable charging options for electric vehicles, allowing for efficient and convenient charging using either wireline or inductive methods, while ensuring compliance with electromagnetic compatibility standards and reducing the need for specific charging installations.
Implementation Method 1
a secondary inductive device capable of being connected to the primary inductive device for energy transfer between the primary inductive device and the secondary inductive device, thereby generating an induced electric signal
Data Source
AI summary
A charging device for electric vehicles includes two power sources interacting with a primary inductive device. The charging device also includes an input circuit having a first input connectable to a first power source, a second input and at least one output connectable to a charger, a secondary inductive device capable of being coupled to the primary inductive device for energy transfer between the primary inductive device and the secondary inductive device, thereby generating an induced electric signal at the output of the secondary inductive device, and a converter from the induced electric signal to an electric signal towards the second power supply input of the input circuit, the converter being configured such that the electric signal is similar to the electric signal of the first power source.