Wireless EV Battery Heating and Charging by Frequency Switching
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Solution Overview
Problem
Existing vehicle charging systems require vehicle displacement to switch between charging and temperature raising, which is inefficient and inconvenient.
Innovation Solution
A vehicle charging system that includes a power receiver, charger, heat generator, and controller to selectively perform charging and temperature raising using electromagnetic waves without vehicle displacement, by adjusting the frequency of the electromagnetic wave to optimize power generation and heat generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle is parked outside the electromagnetic field for charging alone, then charging efficiency is improved, but the convenience of operation deteriorates due to requiring vehicle displacement
Solution Approach 1:
The system dynamically changes the frequency of the electromagnetic wave transmitted by the power transmitter. By adjusting the frequency to match either the power generation band or heat generation band of the power receiver, the system can selectively perform charging or temperature raising without requiring vehicle displacement, thus maintaining operational convenience while achieving efficient charging
Solution Approach 2:
The invention changes the frequency parameter of the electromagnetic wave to switch between different functional modes. When the frequency is set to the power generation band, the power receiver efficiently generates electric power for charging. When set to the heat generation band, the power receiver efficiently generates heat for temperature raising. This parameter change enables selective operation modes without vehicle displacement
2Adaptability or versatility
If the power generation band and heat generation band completely overlap, then the system complexity increases, but the ability to selectively perform charging and temperature raising improves
Solution Approach 1:
The system uses dynamic frequency adjustment to achieve selective operation. The power transmitter can change the electromagnetic wave frequency between the power generation band and heat generation band based on the desired operation mode (charging or temperature raising). This dynamic control provides versatility without requiring complex hardware modifications
Solution Approach 2:
The power receiver is designed to perform multiple functions by receiving electromagnetic waves at different frequencies. The same power receiver can efficiently generate electric power when the frequency matches the power generation band, and efficiently generate heat when the frequency matches the heat generation band. This multi-functionality achieves adaptability while keeping the device structure relatively simple
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 efficient and convenient simultaneous charging and temperature raising of vehicle batteries without requiring vehicle repositioning, maintaining battery performance and driver comfort.
Implementation Method 1
a power receiver (12) configured to receive an electromagnetic wave to generate electric power
Implementation Method 2
a heat generator (10) configured to receive the electromagnetic wave to generate heat
Data Source
AI summary
A vehicle includes a secondary battery, a power receiver, a charger, a heat generator, and a battery temperature raising unit. The power receiver receives an electromagnetic wave to generate electric power. The charger charges the secondary battery by using the electric power generated by the power receiver. The heat generator receives the electromagnetic wave to generate heat. The battery temperature raising unit raises temperature of the secondary battery by using the heat generator as a heat source. A part of a heat generation band, which is a frequency band of the electromagnetic wave in which the heat generator has an increased heat generation efficiency, does not overlap a power generation band, which is a frequency band of the electromagnetic wave in which the power receiver has an increased power generation efficiency, and a part of the power generation band does not overlap the heat generation band.