Battery-Powered Machining Tool Feedback for Battery Power Limits
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Solution Overview
Problem
Rechargeable-battery-operated machining tools underperform when used with exchangeable batteries that exceed their power limits, leading to unsatisfactory work progress and user misperception of tool defects.
Innovation Solution
A sensing unit in the tool monitors power characteristics of the exchangeable battery at defined intervals, calculating the frequency at which the battery operates at its power limit, and provides advice to the user through a communication device or internal computing unit to switch to a more powerful battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rechargeable-battery-operated machining tool is used with an exchangeable rechargeable battery having excessively low current-supplying capability, then the battery can be used with any tool, but the machining tool cannot fully utilize its performance resulting in unsatisfactory work progress
Solution Approach 1:
The control device monitors the actual power delivery of the battery in real-time and provides feedback to the user interface. When the battery's current-supplying capability is insufficient, the system detects this through power characteristic variables and communicates the mismatch to the user, enabling informed battery selection and preventing productivity loss.
Solution Approach 2:
The system performs preliminary checking of battery power characteristics before full operation begins. By sensing power delivery capability in advance and comparing it against tool requirements, the system can warn users about incompatible batteries before they start work, preventing unsatisfactory work progress from the outset.
2Reliability
If the user continues to use an underpowered battery, then the tool may be perceived as defective, but repeated power limit exceedances cause battery damage from overheating
Solution Approach 1:
The system continuously monitors power characteristic variables and provides feedback to the user when power limits are repeatedly exceeded. This prevents the user from mistakenly believing the tool is defective while simultaneously warning them of the risk of battery damage, enabling timely battery replacement.
Solution Approach 2:
The control device takes preliminary protective action by detecting repeated power limit exceedances and warning the user before significant battery damage occurs. By monitoring power delivery and comparing it against battery capabilities, the system prevents harmful overheating conditions from developing.
3Loss of information
If the system monitors and calculates battery power limit frequency, then users receive accurate advice about battery performance, but the device complexity increases with additional sensing and computing requirements
Solution Approach 1:
The control device performs multiple functions using the same sensing and computing resources: it manages the electric drive, monitors battery status, calculates power limit frequency, and provides user advice. By making the control device multi-functional, the patent avoids adding separate dedicated hardware for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The system uses its own existing sensing capabilities and computing resources to monitor battery performance and generate advice, rather than requiring external monitoring equipment. The control device serves itself by utilizing its internal processors and sensors to perform the additional power characterization functions.
Data Source
AI summary
The disclosure relates to a method for interacting with a user of a rechargeable-battery-operated machining tool, which can be supplied with energy by means of an exchangeable rechargeable battery pack or exchangeable rechargeable battery. According to the disclosure, in one method step a power characteristic variable of the exchangeable rechargeable battery pack or exchangeable rechargeable battery is sensed by means of a sensing unit of the rechargeable-battery-operated machining tool and/or of the exchangeable rechargeable battery pack or exchangeable rechargeable battery at defined times during the operation of the rechargeable-battery-operated machining tool, and in an additional method step the frequency with which the exchangeable rechargeable battery pack or exchangeable rechargeable battery has been operated at its power limit is calculated. The disclosure also relates to a system, comprising a rechargeable-battery-operated machining tool and an exchangeable rechargeable battery pack or exchangeable rechargeable battery, for carrying out the method.