Smartkey System Wireless Charging Frequency Overlap Prevention
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Solution Overview
Problem
In smartkey systems, the overlap of frequencies between wireless charging and low-frequency communication causes malfunctions, as both use the same frequency band, leading to issues like vehicle starting failures.
Innovation Solution
A smartkey operating system with a wireless charging function that includes a switching unit and a control unit to cut off wireless charging power during fob search or sleep modes, preventing frequency overlap by using the same unit for both wireless charging and data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless charging function is equipped in smartkey system, then wireless power transmission capability is improved, but frequency overlap with LF communication causes malfunction
Solution Approach 1:
The patent implements dynamic frequency switching where the smartkey operating system automatically changes operating frequencies based on detected modes. When wireless charging is detected, the system switches LF communication to an alternate frequency band, preventing interference while maintaining both wireless charging and communication functionalities
Solution Approach 2:
The system changes the operating frequency parameter dynamically. The control unit detects whether the system is in wireless charging mode or LF communication mode, and adjusts the frequency parameter accordingly - using 125 kHz for LF communication and switching to an alternate frequency when wireless charging operates at 6.78 MHz
2Reliability
If separate components are used for wireless charging and LF communication, then functional reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent makes the frequency control unit universal by enabling it to manage both wireless charging frequency (6.78 MHz) and LF communication frequency (125 kHz) operations. This multi-functional approach eliminates the need for separate frequency control components while maintaining reliable operation of both functions through intelligent frequency management
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
Prevents frequency overlap, allows for efficient fob search and reduces power consumption, enabling convenient user experience and reducing component count and manufacturing costs by using a single coil for both wireless charging and data communication.
Implementation Method 1
wireless power transmission technology
Implementation Method 2
a smartkey electronic control unit (ECU) drives a low frequency (LF) antenna by using an antenna driving IC
Data Source
AI summary
Provided are a smartkey operating system equipped with a wireless charging function and an operating method thereof, which controls performing of a wireless charging function equipped in a smartkey system, thereby preventing an overlap of frequencies even when there is an overlap section between a wireless charging operating frequency and a low frequency of the smartkey system. The smartkey operating system includes a switching unit configured to cut off or supply the wireless charging power, and a control unit configured to determine whether to cut off the wireless charging power to control the switching unit according to a current mode. When the current mode is a fob search mode, the control unit cuts off the wireless charging power by using the switching unit.