Backpack Power Supply Heat Dissipation and Intelligent Shutdown
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Solution Overview
Problem
Conventional waist belt power supplies have limited capacity and do not effectively manage heat dissipation or user comfort during extended use of power tools.
Innovation Solution
A backpack-type power supply system with a high-capacity battery pack, air-passaging design for heat dissipation, and intelligent shutdown circuits to prevent overcharging and errors, along with a modular adapter for efficient power delivery and user-friendly operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a high-capacity battery pack is used to increase power supply capacity, then the battery capacity is improved, but the heat generation increases causing user discomfort
Solution Approach 1:
The patent converts the harmful heat generated by the high-capacity battery into a beneficial cooling effect by introducing a cooling fan that actively removes heat from the battery compartment, transforming the thermal problem into a managed heat dissipation system
Solution Approach 2:
The patent employs a cooling fan to create forced air convection through the battery compartment, using pneumatic principles to circulate air and enhance heat removal from the high-capacity battery pack
2Quantity of substance
If a backpack-type design is used to increase battery capacity, then the power supply capacity is improved, but the device complexity increases
Solution Approach 1:
The adapter serves multiple functions: it connects the battery pack to the charger, provides battery identification signals, and enables communication between the battery-side microcomputer and charger-side microcomputer, reducing the need for separate dedicated components
Solution Approach 2:
The adapter acts as an intermediary device between the battery pack and charger, facilitating electrical connection and signal transmission while isolating the complex control logic from the user interface
3Reliability
If intelligent shutdown circuits are added to prevent overcharging, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The battery-side microcomputer continuously monitors battery status and communicates with the charger-side microcomputer to provide feedback on charging state, enabling intelligent shutdown decisions based on real-time battery conditions
Solution Approach 2:
The system performs self-diagnosis and automatic shutdown when overcharging is detected, with the microcomputers managing the charging process autonomously without requiring manual intervention or complex external control circuits
Data Source
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Figure 2(b)
AI summary
A rechargeable system includes: a charger; a battery pack; an adapter configured to be electrically connected between the charger and the battery pack, a cable configured to be electrically connected between the battery pack and the adapter. A battery-side microcomputer controls the shutdown circuit such that the shutdown circuit disconnects the at least one of the positive terminal of the battery pack and the negative terminal of the battery pack from the rechargeable battery when detection of the battery-side microcomputer indicates occurrence of at least one of two following events: one event is such that the rechargeable battery is fully charged. Another event is such that the rechargeable battery has some errors.