Multi-Voltage Power Tool Battery Interface With Terminal Detection
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Solution Overview
Problem
Existing power tools are limited to using battery packs with specific dimensions and voltage specifications, requiring complex and unreliable identification methods, which complicates the use of multiple battery packs and poses risks to the tool's components due to voltage mismatches.
Innovation Solution
A power tool body designed to accommodate multiple battery packs with different nominal voltages and output terminal sets, featuring a versatile input terminal set that identifies battery packs through terminal configuration and signal detection, and a voltage regulation mechanism to ensure safe and efficient operation across a range of voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power tool is designed to adapt to only one specific battery pack specification, then the connection reliability is high, but the adaptability is poor
Solution Approach 1:
The power tool body is designed with a universal input terminal set that can accommodate multiple battery pack specifications. The terminal set includes multiple input terminals that can be selectively electrically connected to different output terminal sets of battery packs with different nominal voltages, enabling one power tool to work with multiple battery pack types without requiring multiple specialized interfaces.
Solution Approach 2:
A controller acts as an intermediary between the input terminal set and the power tool body. The controller acquires connection states of preset terminals and determines which battery pack is connected, then selectively connects the appropriate input terminals to the power tool body through switching circuits, ensuring reliable operation regardless of which battery pack is used.
2Adaptability or versatility
If the power tool uses a universal input terminal set to accommodate multiple battery packs, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The input terminal set is segmented into multiple independent input terminals, each corresponding to specific terminals in different battery pack output terminal sets. This segmentation allows the system to handle different battery pack configurations through selective connection of individual terminals rather than requiring a completely different interface for each battery pack type.
Solution Approach 2:
The controller monitors the connection state of preset terminals and uses this feedback information to automatically determine which battery pack is connected and to selectively activate the appropriate input terminals. This feedback mechanism simplifies the user experience by automatically adapting the terminal connections based on the detected battery pack type.
3Reliability
If the power tool body selectively connects input terminals based on battery pack type, then the reliability is improved, but the measurement precision required for terminal identification increases
Solution Approach 1:
The controller performs preliminary detection of the connection state of preset terminals before activating the power tool. By acquiring connection states in advance and determining the appropriate battery pack type beforehand, the system ensures reliable voltage matching and prevents incorrect operation before the tool is actually used.
Data Source
AI summary
A power tool includes a power tool body. The power tool body is configured to be adapted to at least a first battery pack having a first nominal voltage and a first output terminal set and a second battery pack having a second nominal voltage and a second output terminal set, where the first nominal voltage is different from the second nominal voltage. The power tool body includes a first input terminal set configured to be selectively electrically connected to one of the first output terminal set and the second output terminal set to supply power to the power tool body.