Vehicle Power Supply Relay Hold Logic for Solar Switching Wear
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Solution Overview
Problem
The existing vehicle power supply systems experience a significant reduction in relay life due to frequent switching ON and OFF when solar radiation levels are unstable, leading to increased relay wear and tear.
Innovation Solution
The proposed vehicle power supply system introduces a mechanism to keep the relay ON once the predetermined number of switching cycles is reached, thereby reducing the frequency of ON and OFF states and minimizing relay wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the relay switches ON and OFF frequently to manage power supply from drive battery to auxiliary unit, then the power supply control flexibility is improved, but the relay life is significantly reduced
Solution Approach 1:
The system dynamically adjusts relay switching behavior based on operating conditions. When solar power is sufficient, the relay remains OFF; when solar power is insufficient, the relay switches ON/OFF to manage power supply. This dynamic adaptation resolves the contradiction by making switching frequency conditional rather than constant.
Solution Approach 2:
The control unit monitors solar radiation intensity and power generation amount as varying parameters, and adjusts relay switching decisions based on these parameter changes. When solar power generation meets auxiliary unit demand, relay switching is minimized; when it falls short, switching occurs to supplement from drive battery.
2Reliability
If the relay is kept ON to reduce switching cycles, then the relay life is extended, but the power consumption of the drive battery increases
Solution Approach 1:
The relay state (ON/OFF) is dynamically determined based on real-time power generation capacity. The system keeps the relay OFF when solar power suffices, and only switches it ON when power supplementation is needed, thus balancing relay life extension with energy conservation.
Solution Approach 2:
The solar panel system serves itself by directly powering the auxiliary unit when sufficient, eliminating the need for drive battery intervention. The relay remains OFF in this self-sufficient state, extending its life while minimizing drive battery consumption.
3Adaptability or versatility
If the relay switches frequently to ensure charging opportunities from solar panel, then the power supply adaptability is improved, but the relay durability deteriorates
Solution Approach 1:
The system monitors changing parameters including solar radiation intensity, power generation amount, and auxiliary unit power demand. Relay switching decisions are made based on these parameter variations, ensuring adaptability while avoiding unnecessary switching that would reduce durability.
Solution Approach 2:
The control unit continuously receives feedback on power generation status and auxiliary unit power status, and adjusts relay switching accordingly. This feedback mechanism ensures the relay switches only when necessary to maintain power supply adaptability, thereby preserving relay durability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prolongs the relay's lifespan by reducing the number of switching cycles, while also optimizing power consumption by ensuring charging opportunities through solar power generation.
Implementation Method 1
a solar panel 11 and a drive battery 12, and supplies electric power from the solar panel 11 or the drive battery 12 to an auxiliary unit 13
Data Source
AI summary
A vehicle power supply system supplies electric power generated by a solar panel to an auxiliary unit, and supplies electric power from a drive battery to the auxiliary unit, and switches between ON and OFF of connection between the drive battery and the auxiliary unit by a relay. When the number of times the relay has been switched is greater than or equal to a predetermined number of times, the relay is kept ON.