Vehicle Key Mode Switching for Low-Power Connectivity
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Solution Overview
Problem
Vehicle keys powered by built-in batteries face issues with insufficient power and short battery life due to high power consumption during broadcasting and communication with vehicles.
Innovation Solution
A method and device that adjust the vehicle key mode based on gear information, position, and state information to reduce power consumption, including sending instructions to change modes and disconnect when not in use, thereby optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle key maintains continuous broadcasting and connection with the vehicle, then the connectivity and response speed are improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The patent implements dynamic mode switching between first mode (high connectivity, higher power consumption) and second mode (low connectivity, low power consumption) based on vehicle gear state. The vehicle key adjusts its operating parameters dynamically: in first mode it maintains frequent broadcasting and short connection intervals for responsive communication, while in second mode it reduces broadcasting frequency and extends connection intervals to conserve battery power during parking scenarios.
Solution Approach 2:
The patent changes key operating parameters including broadcasting interval, connection interval, and operating mode based on vehicle state. When the vehicle is in parking gear, the system transitions to second mode with extended connection intervals and reduced broadcasting frequency. When the vehicle is in driving gear, the system switches to first mode with shorter connection intervals and higher broadcasting frequency, optimizing the balance between connectivity and power consumption.
2Speed
If the vehicle key maintains frequent connection and broadcasting, then the response speed is improved, but the battery life decreases
Solution Approach 1:
The system dynamically adjusts the connection interval and broadcasting frequency based on vehicle operating state. In first mode (during vehicle operation), the key maintains short connection intervals and high broadcasting frequency to ensure fast response. In second mode (during parking), the key extends connection intervals and reduces broadcasting frequency to preserve battery life, eliminating the need for continuous high-speed communication when the vehicle is stationary.
3Duration of action of moving object
If the vehicle key reduces power consumption by entering low-power mode, then the battery life is extended, but the connectivity and response speed deteriorate
Solution Approach 1:
The patent implements bidirectional mode switching that adapts connectivity parameters to vehicle state. When transitioning to second mode for power saving, the system extends connection intervals and reduces broadcasting frequency. When transitioning back to first mode, the system restores short connection intervals and high broadcasting frequency, ensuring connectivity requirements are met during vehicle operation while enabling power conservation during parking.
Solution Approach 2:
The system uses vehicle gear state information as feedback to control the operating mode of the vehicle key. The vehicle sends gear information to the key, which then adjusts its broadcasting and connection behavior accordingly. This feedback mechanism ensures that connectivity is optimized when needed (vehicle in gear) and power consumption is reduced when not needed (vehicle in parking gear).
Data Source
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AI summary
A method for processing a vehicle key includes: obtaining (S21) gear information of the vehicle; and sending (S22) a first instruction to the vehicle key according to the gear information. The first instruction is configured to control the vehicle key to be adjusted from a current first mode to a second mode, and a power consumption of the vehicle key in the second mode is lower than a power consumption of the vehicle key in the first mode.