In-Vehicle Wireless Charger With RF Power Reception and Inductive Output
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Solution Overview
Problem
Existing chargers for electrical devices in vehicles are limited in their installation location due to the need for a wired connection to a power source, making them inconvenient to use.
Innovation Solution
A charger system that includes a power receiving unit for wireless power supply via radio waves from a power transmitting device in the vehicle, a power storage unit for charging, and a power transmission unit for wireless charging of electrical devices via electromagnetic induction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charger is connected to a power source terminal by a connection cord, then the charger can perform wired power supply, but the charger can be installed only at a location relatively near the power source terminal
Solution Approach 1:
A power storage unit is introduced as an intermediary between the power receiving unit and the power transmission unit. The power storage unit stores power received wirelessly from a power transmitting device, enabling the charger to operate independently from fixed power source terminals while maintaining reliable power supply capability.
Solution Approach 2:
The mechanical connection system (connection cord and power source terminal) is replaced with a wireless power transmission system. The charger receives power wirelessly through a power receiving unit and transmits power wirelessly through a power transmission unit, eliminating the need for physical connection to power source terminals.
2Reliability
If the charger uses wired connection for power supply, then the power supply is stable, but the charger is not easy to use
Solution Approach 1:
The wired mechanical connection system is replaced with wireless electromagnetic fields for power transmission. The power receiving unit receives power wirelessly from a power transmitting device, and the power transmission unit transmits power wirelessly to electrical devices, providing usage flexibility without sacrificing power supply stability.
Solution Approach 2:
The charger is designed with dual functionality: it can receive power wirelessly from a power transmitting device and simultaneously transmit power wirelessly to electrical devices. This multi-functional design enables the charger to operate in various locations including inside and outside the vehicle, enhancing adaptability while maintaining reliable power supply.
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 solution increases the flexibility in installing the charger, allowing it to be used at various locations within the vehicle, including the passenger compartment and outside the vehicle, thereby enhancing user convenience.
Implementation Method 1
a power receiving unit configured to receive, through wireless power supply via radio waves, power transmitted from a power transmitting device
Implementation Method 2
a power transmission unit configured to transmit, through wireless power supply via electromagnetic induction, the power stored in the power storage unit to an electrical device
Data Source
AI summary
A charger includes a power receiving unit, a power storage unit, and a power transmission unit. The power receiving unit is configured to receive, through wireless power supply via radio waves, power transmitted from a power transmitting device disposed in a vehicle. The power storage unit is configured to be supplied and charged with the power received by the power receiving unit. The power transmission unit is configured to transmit, through wireless power supply via electromagnetic induction, the power stored in the power storage unit to an electrical device that is to be charged.