In-Vehicle Charger Wireless Key Interference Control
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Solution Overview
Problem
The reliability of vehicle control systems, such as keyless entry, is compromised when mobile devices are charged in vehicles due to electromagnetic interference from charging coils, leading to potential communication failures and operational issues with door opening/closing and engine starting.
Innovation Solution
An in-vehicle charger with a controller and detection unit that verifies the installation state of the device to be charged and only turns on power supply after successful communication verification, ensuring that the keyless entry device operates correctly by performing first and second communication verifications and adjusting power supply accordingly, particularly when the vehicle is in motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the in-vehicle charger charges a wireless key using electromagnetic waves, then the mobile device can be charged in the vehicle, but the reliability of wireless communication between the wireless key and the transceiver is decreased
Solution Approach 1:
The system performs communication verification before enabling charging. The detection unit detects the installation state of the wireless key, the controller verifies communication between the wireless key and transceiver, and only after successful verification does the power supply unit enable charging. This preliminary communication check ensures that charging will not interfere with subsequent keyless entry operations.
Solution Approach 2:
The system continuously monitors communication status during and after charging. The detection unit detects installation state, the controller performs communication verification, and based on the verification result, the power supply unit adjusts charging status. This feedback mechanism ensures that if communication is interrupted during charging, the system can respond by stopping charging to maintain reliability.
2Ease of operation
If the charger is turned on continuously to ensure charging availability, then charging convenience is improved, but the risk of electromagnetic interference with keyless entry communication increases
Solution Approach 1:
Before enabling charging, the system performs preliminary detection of the wireless key's installation state and conducts communication verification between the wireless key and transceiver. Only after successful verification does the power supply unit activate the charger. This ensures charging is available when needed but prevents activation that would cause interference.
Solution Approach 2:
The charging state is dynamically controlled based on real-time communication verification results. The power supply unit adjusts charging status according to whether communication between the wireless key and transceiver is successful, rather than maintaining a fixed on/off state. This dynamic control balances charging availability with interference prevention.
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 communication failures and operational issues with keyless entry systems by ensuring that the wireless key is not charged during vehicle operation, maintaining the reliability of vehicle control systems.
Implementation Method 1
power is supplied by magnetic flux in such a way that the mobile device is accommodated in the case and the charging coil of the in-vehicle charger and a charging coil of the mobile device are placed to face each other
Implementation Method 2
electromagnetic waves emitted from a charging coil thereof affect the wireless communication between the wireless key and the transceiver of the vehicle
Data Source
AI summary
An in-vehicle charger includes a charger that charges a device to be charged including a wireless key of a keyless entry device, a controller connected to the charger, and a detection unit connected to the controller and that detects an installation state of the device to be charged relative to the charger. The controller turns on power supply to the charger and controls the keyless entry device to perform first communication verification when the installation state of the device to be charged relative to the charger is detected by the detection unit. The controller turns on the power supply to the charger when it is determined that the communication verification of the keyless entry device has been performed.