Dual-Voltage Battery Pack USB Output With Self-Locking Protection
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Solution Overview
Problem
Existing battery packs are limited in functionality, primarily providing power to electric tools and lacking the ability to charge external devices like mobile phones, and there is a need to enhance their versatility.
Innovation Solution
A battery pack power supply system with a switch control circuit, main control chip, wake-up circuit, USB circuit, and self-locking circuit, allowing series or parallel connection of battery sets, and incorporating a USB interface for charging external devices, along with a self-locking mechanism to protect the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional dual-voltage lithium battery pack is used to power electric tools, then the battery pack can provide power supply functionality, but it cannot charge external devices such as mobile phones
Solution Approach 1:
The battery pack is designed with a USB circuit that enables it to perform multiple functions: powering electric tools through the original electrical connection and charging external devices such as mobile phones through the USB interface. This multi-functionality transforms the battery pack from a single-purpose power source into a universal power supply device that can serve both electric tools and portable electronic devices.
Solution Approach 2:
The patent combines the original power supply circuit for electric tools with a USB charging circuit into a single integrated battery pack system. The main control chip coordinates both functions, allowing the battery pack to simultaneously support traditional electrical tool operation and modern USB device charging through shared battery sets and control logic.
2Adaptability or versatility
If electronic switches are used to switch between series and parallel connection of battery sets, then the battery pack can provide dual voltage specifications, but the system becomes more complex and vulnerable to damage
Solution Approach 1:
The self-locking circuit is designed to preemptively prevent potential system damage by automatically disabling the electronic switches when abnormal conditions are detected or when the battery pack is connected to electric tools. This preliminary protective action occurs before damage can occur, ensuring system safety while maintaining the dual-voltage switching capability during normal operation.
3Adaptability or versatility
If the battery pack is designed to charge external devices, then the versatility is improved, but additional circuits and components are required
Solution Approach 1:
The battery pack integrates a USB circuit that enables charging of external devices while sharing the existing battery sets and control systems. This approach adds charging capability without requiring completely separate power supply systems, achieving multi-functionality with reasonable complexity by leveraging existing components for dual purposes.
Data Source
AI summary
A battery pack is provided. The battery pack includes a housing, a plurality of battery sets arranged in the housing, and a power supply system. The power supply system includes a switch control circuit for controlling a series-parallel connection mode of the plurality of battery sets, a main control chip for controlling the discharge of the plurality of battery sets by the switch control circuit, a wake-up circuit for waking up the power supply system of the battery pack when the main control chip receives a wake-up signal, a self-locking circuit connected to the switch control circuit which switches to a disabled state when the self-locking circuit is triggered; and a USB circuit and an extended power output interface, connected to the plurality of battery sets for outputting power to charge external devices.