Vehicle Power Supply System Priority Load Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vehicle power source systems, when the output power from the main-power source drops, existing technologies fail to ensure sufficient electric power supply to auxiliary machine loads with high actuation priority, leading to potential failures in critical systems.
Innovation Solution
A power source system that includes a main-power source, a first load, a second load with higher actuation priority, a sub-power source, and a control unit that detects the output power of the main-power source and prioritizes electric power supply from the sub-power source to the second load, ensuring more power is delivered to high-priority loads by regulating and switching electric power through a DC-DC converter or relay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric power from the sub-power source is uniformly supplied to all auxiliary machine loads when main-power source output drops, then the power supply system is simple to control, but high-priority loads may not receive sufficient power
Solution Approach 1:
The patent segments the auxiliary machine loads into multiple priority groups (first priority, second priority, third priority) based on their actuation priority. The control unit distributes power from the sub-power source differently to each priority group, ensuring that high-priority loads receive sufficient power even when the main-power source output drops. This segmentation resolves the contradiction by enabling differentiated power allocation without requiring complex individual control of each load.
Solution Approach 2:
The patent applies local quality by assigning different power supply characteristics to different priority groups. High-priority loads receive preferential power allocation with higher guaranteed power ratios, while lower-priority loads receive remaining power. This localized differentiation in power quality and quantity ensures critical systems maintain operation while simplifying control compared to individual load management.
2Reliability
If the sub-power source supplies power to all auxiliary machine loads equally, then the power distribution is simple and uniform, but critical systems may fail when total power is insufficient
Solution Approach 1:
The patent implements dynamic power distribution where the control unit continuously monitors the main-power source output and adjusts the power allocation ratio to different priority groups in real-time. When main-power source output is sufficient, power is distributed more uniformly; when output drops, the system dynamically shifts to preferential allocation for high-priority loads. This dynamic adaptation maintains system safety while keeping operation management relatively simple through automated control.
Solution Approach 2:
The control unit receives feedback about the main-power source output status and the power consumption of auxiliary machine loads, then adjusts the power distribution strategy accordingly. This feedback mechanism ensures that critical systems receive adequate power during shortages while maintaining simple overall system operation through centralized automated decision-making based on real-time conditions.
3Reliability
If more power is allocated to high-priority auxiliary machine loads during main-power source failure, then critical systems remain operational, but low-priority loads may be underpowered or shut down
Solution Approach 1:
The patent applies partial action by allocating power preferentially to high-priority loads rather than attempting to maintain all loads at full capacity during main-power source failure. The control unit ensures sufficient power to critical systems (excessive action for priority loads) while accepting reduced or zero power to lower-priority loads. This partial focus on essential functions maintains critical system reliability while managing overall system capacity constraints efficiently.
Solution Approach 2:
The system changes the power allocation parameter dynamically based on main-power source output conditions. When output drops below required levels, the control unit modifies the power distribution ratio, increasing the proportion allocated to high-priority loads and reducing allocation to lower-priority loads. This parameter adjustment ensures critical systems remain operational while adapting overall auxiliary machine operation capacity to available power resources.
Data Source
AI summary
A power source system includes: a main-power source; a first load connected in parallel to the main-power source; a second load connected in parallel to the main-power source, the second load being higher in an actuation priority than the first load; a sub-power source connected in parallel to the first load and the second load; a first detection unit configured to detect output electric power of the main-power source; and a control unit configured to supply electric power from the sub-power source more to the second load than to the first load, when the output electric power of the main-power source is less than required electric power of the second load.