Capacitor Buffer for Cordless Tool Control During Battery Swap
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Solution Overview
Problem
Battery-operated tools with control devices, such as cordless screwdrivers, experience extended cycle times for machining due to the need to restart the operating system after replacing a discharged rechargeable battery, as the control device is deactivated when the battery is removed and must be rebooted upon insertion of a new battery.
Innovation Solution
A portable tool equipped with a capacitor to store electrical energy, allowing the control device to remain active during battery replacement, eliminating the need for system shutdown and immediate resumption of machining operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the rechargeable battery is replaced in battery-operated tools with control devices, then the battery can be renewed, but the operating system must be shut down and restarted, extending cycle times
Solution Approach 1:
The control device is designed to automatically save the current state and initiate a warm start sequence before the battery is fully removed, preparing the system in advance to minimize shutdown time and enable faster resumption of operations
Solution Approach 2:
A buffer power supply or energy storage element is introduced as an intermediary to maintain power to the control device during battery replacement, allowing the operating system to remain active or resume quickly without complete shutdown
2Productivity
If the control device is deactivated when removing the rechargeable battery, then power is saved, but the operating system must be rebooted, reducing productivity
Solution Approach 1:
The system performs preliminary actions by saving critical data and maintaining core system states in memory before battery removal, enabling rapid recovery and resumption of machining operations without full reboot, thus maintaining productivity
Solution Approach 2:
The control device maintains continuous operation or warm standby state during battery replacement through auxiliary power or energy buffering, ensuring the operating system remains active and machining can resume immediately, maximizing productivity
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
Enables continuous machining without interruptions by maintaining the control device's power supply during battery replacement, reducing downtime and enhancing operational efficiency.
Implementation Method 1
at least one substantially electrical element, in particular a capacitor (2), for storing electrical energy at least for a short time
Data Source
AI summary
A portable and battery-operated tool for machining a workpiece and to a method for replacing the rechargeable battery of the tool is disclosed. The tool has at least one drive device for driving a working head, at least one rechargeable battery for providing electrical energy, at least one control device with an operating system for controlling and/or regulating machining parameters, at least one storage device for storing machining data and at least one transmitting and receiving device for transmitting and/or receiving the machining data and also at least one substantially electrical element for storing electrical energy at least for a short time in order to make it possible to replace the rechargeable battery when the operating system is activated.