Smart Battery Pack With Motion Sensing for Electric Tool Cutoff
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Solution Overview
Problem
Electric tools face safety issues such as recoil or dropping during operation, which can cause damage or injury, and also experience lifespan or malfunction problems due to the nature of tasks performed.
Innovation Solution
An intelligent battery with an integrated control device, including an inertial measurement unit and a communication and control module, that measures motion parameters of the electric tool, generates state indication signals, and controls the power output to prevent accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intelligent battery with control device is integrated into the electric tool, then safety protection is improved, but device complexity increases
Solution Approach 1:
The patent merges the control device, inertial measurement unit, and communication module into an integrated battery assembly. This combining of multiple functional components into a single integrated unit provides safety protection functions while avoiding the complexity of separate distributed control systems throughout the tool.
Solution Approach 2:
The battery serves as an intermediary component that mediates between the motor and the external environment. The control device within the battery monitors tool state through sensors and autonomously controls power delivery, acting as a smart intermediary that simplifies the overall system architecture while enhancing safety.
2Reliability
If motion sensors and control modules are integrated into the battery, then safety monitoring is improved, but manufacturing complexity increases
Solution Approach 1:
The battery is designed as a universal platform that can be applied to multiple types of electric tools. The control device and sensor integration create a multi-functional battery that provides power storage, safety monitoring, and communication capabilities across different tool applications, simplifying manufacturing through standardized components.
Solution Approach 2:
The control device is pre-integrated into the battery assembly during manufacturing, rather than being added to individual tools. This preliminary integration of safety monitoring functionality into the battery allows for standardized production of the control system, reducing overall manufacturing complexity while enabling safety monitoring across all tools using this battery type.
3Reliability
If the control device continuously monitors motion parameters, then safety protection is improved, but energy consumption increases
Solution Approach 1:
The control device employs periodic sampling of motion parameters rather than continuous monitoring. The inertial measurement unit takes measurements at predetermined time intervals, which maintains adequate safety monitoring capability while significantly reducing the average power consumption compared to continuous real-time monitoring.
Solution Approach 2:
The system uses feedback control where the control device monitors motion parameters and only takes corrective action when abnormal conditions are detected. The processor compares sensor readings against threshold values and only activates power cutoff or reduction when safety thresholds are exceeded, minimizing energy consumption during normal operation while maintaining protection capability.
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
The intelligent battery effectively prevents damage to the electric tool or other objects by controlling power output during accidents, and simplifies maintenance and adaptation across different electric tools.
Implementation Method 1
the inertial measurement unit includes: at least one sensor configured to measure at least one motion parameter of the electric tool
Data Source
AI summary
An electric tool includes an electric motor and a battery for supplying electric power to the motor. The battery includes: a battery cell; a control device integrated into the battery cell, the control device comprising an inertial measurement unit and a communication and control module, wherein the inertial measurement unit includes: at least one sensor configured to measure at least one motion parameter of the electric tool, and a controller configured to receive the motion parameter output by the at least one sensor and generate a state indication signal indicating the motion state of the electric tool; the communication and control module comprising: a communication unit configured to communicate with external devices, and a processor configured to receive the state indication signal and generate a switch control signal; a switch network configured to receive the switch control signal generated by the control device and control the power output of the battery based on the switch control signal.