Vehicle Backup Power Prioritization Under Low Battery Energy
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Solution Overview
Problem
Existing backup power-supply systems may not ensure that important loads receive electric power when the remaining energy in the power storage unit is low, leading to potential disruptions in critical vehicle systems.
Innovation Solution
A backup power-supply system with a detector to monitor abnormal power supply conditions and a controller that limits power distribution to prioritize important loads by imposing restrictions on less critical loads when the remaining energy falls below a threshold, ensuring continued operation of vital systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric power is supplied to all loads using time-sharing processing, then the power distribution is balanced, but important loads may not receive sufficient power when remaining energy is low
Solution Approach 1:
The patent applies local quality by differentiating power supply priorities among different loads. The controller identifies important loads (e.g., safety-critical systems) and allocates power preferentially to them when remaining energy is low, rather than treating all loads equally through time-sharing. This ensures that critical functions maintain operational reliability even under energy-constrained conditions.
2Reliability
If power is supplied to all loads simultaneously, then all loads receive power, but discharge current concentrates and depletes energy too quickly
Solution Approach 1:
The patent employs periodic action through time-sharing power distribution, where the controller alternately supplies power to different loads in sequential time slots rather than simultaneously. This periodic allocation prevents discharge current concentration, extends the duration of power supply from the power storage unit, and maintains continuous operation of loads while managing energy consumption rate.
3Use of energy by moving object
If time-sharing processing is used to distribute power, then energy consumption is managed, but important loads may be deprived of power when energy is low
Solution Approach 1:
The controller implements local quality by assigning different priority levels to different loads. When remaining energy falls below a threshold, the controller preferentially allocates power to important loads (such as safety-critical systems) while reducing or suspending power to non-critical loads. This differentiated approach ensures energy management efficiency while guaranteeing power supply reliability for essential functions.
Data Source
AI summary
A backup power-supply system according to the present invention includes a detector, a power storage unit, and a controller. The detector is configured to detect an abnormality of a power supply that supplies electric power to loads. The power storage unit is configured to supply electric power to the loads when the detector detects the abnormality of the power supply. The controller is configured to monitor a remaining electric energy remaining in the power storage unit, and impose, when the remaining electric energy of the power storage unit is smaller than a threshold electric energy, a limitation on the loads to which the power storage unit supplies the electric power.