Vehicle Power Management for Wireless Module Connection Retention
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Solution Overview
Problem
Conventional vehicle electrical systems disconnect power to wireless communication units when the main switch is turned off, preventing wireless connections with portable devices.
Innovation Solution
A power management method and device that temporarily supplies power to the wireless communication module upon switching the main switch to a non-conductive state, activates a timer, and stops power after a predetermined duration, allowing the module to maintain connections for a set period before resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is continuously supplied to the wireless communication module after the main switch is turned off, then wireless connection can be maintained, but battery power will be depleted
Solution Approach 1:
The patent applies periodic action by providing power to the wireless communication module for a predetermined time period after the main switch is turned off, then stopping power supply. This cyclic power provision allows the module to maintain connections temporarily while conserving battery power, resolving the contradiction between connection availability and energy conservation
Solution Approach 2:
The patent uses preliminary action by establishing wireless connections before the main switch is turned off, and then maintaining those connections for a predetermined time period after power is cut. This allows the system to prepare and complete communication tasks in advance while minimizing subsequent power consumption
2Loss of energy
If power is immediately cut off to the wireless communication module when the main switch is turned off, then battery power is conserved, but wireless connection is lost
Solution Approach 1:
The patent implements periodic action by cutting off power to the wireless communication module after a predetermined time period following the main switch being turned off. This delayed power cutoff maintains connection continuity long enough for most communication tasks while ultimately conserving battery power, resolving the contradiction between energy conservation and connection reliability
3Reliability
If power is supplied to the wireless communication module indefinitely after turning off the main switch, then connection reliability is improved, but the battery may be depleted over time
Solution Approach 1:
The patent applies periodic action by limiting power supply to the wireless communication module to a predetermined time period after the main switch is turned off, rather than providing indefinite power. This time-limited approach maintains connection stability during the power window while preventing long-term battery depletion, resolving the contradiction between connection reliability and battery lifespan
Data Source
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AI summary
A power management method for a vehicle (1) is provided, and includes: upon a power switch (201) of the vehicle (1) being switched from a conductive state to a non-conductive state, controlling an electrical system (20) of the vehicle (1) to temporarily supply a wireless communication module (22) of the vehicle (1) with electric power and activating a timer (213); determining whether an elapsed time has reached a predetermined duration according to the timer (213); when the determination is affirmative, controlling the electrical system (20) to stop supplying electric power; and when the determination is negative, controlling the timer (213) to stop timing upon the power switch (201) being switched from the non-conductive state to the activated state.