Detachable Battery Power Tool Control for Safe Motor Operation
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Solution Overview
Problem
Power tools with detachable power sources face issues such as short working time, overtemperature events, and safety risks due to the use of incompatible or incorrectly selected power supplies with varying capacities and voltage ratings.
Innovation Solution
A power tool with a power controller that retrieves information about the detachable power source via the power source connector, controlling the motor to operate in different modes based on the retrieved information, including capacity, cell number, type, or model, using a lookup table to determine optimal power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a smaller capacity battery pack with smaller footprint and lower weight is selected, then portability and ease of operation are improved, but working time and usability are reduced
Solution Approach 1:
The power controller retrieves information about the detachable power source (capacity, voltage, model) and uses this feedback to automatically adjust motor operating parameters. This ensures optimal performance and working time extraction from each battery pack capacity, maximizing usability regardless of the selected battery size.
Solution Approach 2:
The system dynamically adjusts motor operating parameters based on the detected power source characteristics. The power controller modifies motor settings in real-time according to the retrieved power source information, allowing the system to adapt its behavior to match the available energy capacity.
2Ease of operation
If an incorrect power supply lead with inappropriate voltage/power rating is selected, then ease of connection is improved, but safety and reliability deteriorate due to overloading and overtemperature
Solution Approach 1:
The power controller retrieves and verifies information about the connected power source including voltage and power ratings. This feedback mechanism enables the system to detect incompatible or incorrect power supplies and prevent operation that would lead to overloading or overtemperature conditions, thereby maintaining safety while preserving ease of connection.
Solution Approach 2:
The system performs preliminary verification of power source compatibility before allowing motor operation. By checking the retrieved power source information against safe operating parameters, the system prevents harmful conditions from occurring in the first place, rather than reacting to them after they arise.
3Adaptability or versatility
If detachable power sources with varying capacities and voltage ratings are used, then adaptability and versatility are improved, but working time and safety deteriorate due to incompatibility issues
Solution Approach 1:
The power controller is designed to retrieve and recognize information from various types of detachable power sources with different capacities and voltage ratings. This universal compatibility allows the system to work with multiple power source types while the intelligent control ensures optimal performance and working time extraction from each specific power source.
Solution Approach 2:
The system dynamically adjusts its operation based on the specific power source connected. By retrieving power source information and adapting motor parameters accordingly, the system maximizes working time for each power source capacity while maintaining safety across different voltage and power ratings.
4Adaptability or versatility
If detachable power sources with varying capacities and voltage ratings are used, then adaptability and versatility are improved, but reliability deteriorates due to overloading and overtemperature events
Solution Approach 1:
The power controller retrieves information about the connected power source and uses this feedback to adjust operating parameters that prevent overloading and overtemperature. This feedback mechanism maintains safety and reliability across different power source types and capacities.
Solution Approach 2:
The system performs preliminary checks of power source compatibility and adjusts operating parameters before operation begins. This prevents overloading and overtemperature conditions from occurring, maintaining reliability while allowing versatility in power source selection.
Data Source
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AI summary
A power tool comprises a working component, a motor for driving the working component, a power source connector and a power controller for controlling the motor, where the power controller is configured to retrieve information about a detachable power source connected to the power source connector, and control the motor to operate in one of a plurality of different modes according to the retrieved information of the detachable power source.