Integrated LED Lighting System with Adaptive Power Management
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Solution Overview
Problem
Existing LED street-light systems face inefficiencies due to long wiring causing power loss, increased system complexity, and reliance on utility power grids, which increase costs and reduce reliability.
Innovation Solution
An integrated LED lighting system with a multiple-input power converter that spatially positions a solar panel, battery assembly, and lighting assembly close together, using adaptive power management to optimize energy use and minimize wiring, allowing efficient operation even with low battery power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the battery is placed on or under ground due to its heavy weight, then the battery can be positioned away from the LED light, but long wiring is required causing increased electrical resistance and power loss
Solution Approach 1:
The patent merges the battery, solar panel, and LED light into a single integrated housing unit. This eliminates the need for long wiring connections between separate components, thereby reducing electrical resistance and power loss while accommodating the heavy battery within the same structure as the light source.
2Ease of operation
If long wiring is used to connect the battery to the LED light and PV panel, then the battery can be positioned away from the light, but electrical resistance increases causing waste power consumption
Solution Approach 1:
The patent combines all components (battery, solar panel, LED light, and control circuitry) into a single integrated unit housed together. This eliminates the need for long external wiring connections, thereby reducing electrical resistance and waste power consumption while maintaining full operational flexibility.
3Adaptability or versatility
If multiple power converters are used to convert power between PV panel, battery, and LED light, then power conversion is achieved, but system complexity increases
Solution Approach 1:
The patent employs a single multi-functional power conversion system that can operate in multiple modes: charging the battery from the solar panel, powering the LED light from the battery, and potentially interfacing with AC power sources. This universal converter replaces what would otherwise require multiple separate converters, thereby reducing system complexity while maintaining full adaptability.
4Power
If the battery voltage is low and current is high for high-power LED lights, then the LED light can operate at high power, but power loss in wiring increases significantly
Solution Approach 1:
The patent integrates the battery, solar panel, and LED light within the same housing structure, minimizing the length of wiring required to connect these high-power components. This close integration dramatically reduces the resistance-induced power losses that would otherwise occur in long wiring runs carrying high currents for high-power LED operation.
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
The system enhances energy efficiency, reduces reliance on utility grids, and increases reliability by optimizing power distribution and extending lighting duration without excessive energy consumption.
Implementation Method 1
a prior-art street light system usually comprises a photovoltaic (PV) panel for harvesting solar energy
Implementation Method 2
a battery for storage of the harvested energy. The battery receives and stores the electrical power converted from solar energy
Data Source
Figure 1~2
Figure 3~4B
Figure 5~6
AI summary
A lighting system has a power source formed by a solar panel and a battery assembly, a lighting assembly having a plurality of lighting devices arranged into a plurality of lighting groups, the light assembly having a predetermined maximum power, and a multiple-input power converter electrically coupled to the power source and the lighting assembly for powering the lighting assembly using the power source, and for charging the battery assembly using the solar panel. The multiple-input power converter is configured for calculating a power upper-bound based on the level of stored energy in the battery assembly and the length of a night time, and selecting at least a subset of the lighting groups and powering the selected lighting groups for illumination using the battery assembly for preventing exhausting the stored energy of the battery assembly before the battery assembly can be charged by the solar panel.