Vehicle On-Board Device Power Management via Virtual Battery Scoring
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Solution Overview
Problem
On-board electrical devices in vehicles face long boot times due to increasing functions and hardware development, leading to significant user inconvenience, with existing solutions either consuming battery life or being difficult and ineffective to implement.
Innovation Solution
A method that manages electrical consumption by determining a virtual battery level and calculating a score based on user benefit and energy cost to keep devices active only when providing added value, using an expert system to decide whether to keep devices in standby or operation during battery discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the device is kept in standby mode to avoid long boot times, then the user convenience is improved, but the battery life is reduced due to continuous energy consumption
Solution Approach 1:
The system performs preliminary actions by keeping only essential functions in standby mode before the device is actually needed, rather than keeping all functions active. This allows the device to be ready for critical operations while consuming minimal energy, resolving the contradiction between quick availability and battery conservation.
Solution Approach 2:
The system applies partial action by selectively maintaining only the most critical functions in standby mode rather than all functions. This partial standby approach reduces energy consumption significantly while still providing adequate responsiveness for essential vehicle operations, balancing boot time requirements with battery conservation.
2Use of energy by moving object
If the device is completely stopped to conserve battery life, then the energy consumption is reduced, but the boot time increases significantly causing user inconvenience
Solution Approach 1:
The system performs preliminary actions by pre-initializing critical subsystems and keeping essential data in memory before the device is fully shut down. This allows for a faster reboot process while still achieving significant energy savings compared to keeping the entire device in standby mode.
Solution Approach 2:
The system extracts and separates critical functions from non-critical functions, keeping only the essential ones in a reduced standby state while stopping others completely. This extraction allows the device to consume minimal energy while maintaining readiness for critical vehicle operations.
3Ease of operation
If multiple functions are kept active in standby mode, then the system responsiveness is improved, but the complexity of managing energy distribution increases
Solution Approach 1:
The system segments functions into critical and non-critical categories, with only critical functions maintained in standby mode. This segmentation simplifies energy management by reducing the number of functions that need to be monitored and controlled, while still ensuring system responsiveness for essential vehicle operations.
Solution Approach 2:
The system applies different quality states to different functions: critical functions are kept in a responsive standby state while non-critical functions are completely stopped. This local differentiation of function states simplifies overall energy management while maintaining necessary system responsiveness.
Data Source
AI summary
A method for managing the electrical consumption of an on-board device in a vehicle including an electric power supply battery, the device having a virtual battery, corresponding to a maximum energy quota available to keep the device active, the method includes determining a level of charge of the virtual battery depending on the level of charge of the electric power supply battery, and, in a discharge situation of the electric power supply battery: determining a probable duration of the discharge situation, calculating a score for the benefit of keeping the device active depending on at least one parameter of the vehicle and/or of the user, and, determining an instruction to keep the device active or to stop the device depending on the score and on the probable duration of the discharge situation, and stopping the on-board device if the stop instruction is determined.