Portable Power Supply Layout for Compact High-Voltage DC Tools
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Solution Overview
Problem
Traditional power tools used in areas with inconvenient access to electricity often rely on noisy gasoline engines for power generation, and high-voltage battery packs, which increase tool size and reduce convenience.
Innovation Solution
A portable power supply device with a built-in power battery, multiple output terminals for different voltage levels, and an electrical energy conversion unit for charging and power distribution, allowing for quieter operation and reduced tool size while maintaining long battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high-voltage and high-power battery pack is used to supply power to the power tool, then the power supply capability is improved, but the overall volume of the power tool becomes larger
Solution Approach 1:
The power supply system is segmented into two independent parts: a portable power supply device with a built-in power battery and a separate battery pack that interfaces with the power tool. This segmentation allows the high-voltage power battery to remain in the portable device while the battery pack connected to the tool remains compact, resolving the contradiction between power supply capability and tool volume.
2Power
If a gasoline engine is used to generate power for the power tool, then the power supply capability is improved, but the operating noise becomes very loud
Solution Approach 1:
The mechanical gasoline engine system is replaced with an electrical power system consisting of a power battery, electrical energy conversion unit, and output terminals. This substitution eliminates the combustion process and mechanical moving parts that generate noise, providing quiet operation while maintaining power supply capability.
3Ease of operation
If access to electricity is inconvenient, then the portability is improved, but the charging capability becomes limited
Solution Approach 1:
The portable power supply device is designed with multi-functionality to address various charging scenarios. It includes multiple input terminals (AC charging terminal for grid power, photovoltaic charging terminal for solar power) and multiple output terminals (first output terminal for battery packs, second output terminal for DC power tools, third output terminal for AC electrical devices). This universal design enables charging capability in diverse environments regardless of electricity access convenience.
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 portable power supply device significantly reduces noise levels, enhances battery life, and provides convenient charging options, ensuring efficient power delivery to various power tools without the need for large battery packs, thus improving operational convenience.
Implementation Method 1
a power battery; the power battery is built into the housing
Implementation Method 2
an electrical energy conversion unit configured to convert the electrical energy inputted from the electrical energy input terminal into electrical energy for charging the battery pack
Data Source
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AI summary
A portable power supply device includes a housing; a power battery; an electrical energy input terminal into which at least electrical energy for charging the power battery is inputted; a first output terminal configured to be capable of being connected to at least a battery pack; and a second output terminal configured to be capable of being connected to at least a direct current (DC) power tool. The power battery is built into the housing, the first output voltage of the first output terminal is less than the second output voltage of the second output terminal, and the first output voltage is greater than 20 V.