Vehicle Key Mode Control for Gear-Based Power Saving

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Vehicle keys powered by built-in batteries face issues of 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 vehicle gear information and position/state to reduce power consumption, including sending instructions to change modes to optimize connection intervals and save power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the vehicle key maintains continuous broadcasting and communication with the vehicle, then the response speed for vehicle control operations is improved, but the power consumption increases

Engineering Contradiction:

Improveresponse speedVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic adjustment of the vehicle key's working modes based on vehicle gear information. The key transitions between first mode (higher power consumption, faster response) and second mode (lower power consumption, slower response) depending on whether the vehicle is in gear or in park mode, making the system adaptable to different operational requirements

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the vehicle key by adjusting its working mode. When the vehicle is in park mode, the key switches to second mode with reduced broadcasting frequency and lower power consumption parameters, while maintaining the ability to respond to vehicle control operations when needed

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the vehicle key uses high power consumption mode for broadcasting and communication, then the connection reliability with the vehicle is improved, but the battery life decreases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidbattery life

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent implements periodic switching between different working modes based on vehicle state. The key operates in first mode when the vehicle is in gear (requiring reliable connection) and switches to second mode when in park mode, creating a periodic pattern that balances reliability requirements with battery conservation

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The vehicle system automatically sends instructions to the key to adjust its mode based on gear information, enabling the system to self-regulate power consumption without manual intervention while maintaining appropriate connection reliability

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250254621A1Method for processing vehicle key, vehicle, vehicle key and storage medium

Publication Date: 2025.08.07 XIAOMI EV TECH CO LTD

AI summary

A method for processing a vehicle key includes: obtaining gear information of the vehicle; and sending 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.