Battery Pack Theft Protection via Locking Data Storage
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Solution Overview
Problem
Existing hand-held power tools with theft protection devices require continuous power supply for code signal transmission, limiting the portability of external devices and lacking protection for rechargeable battery packs, leading to inefficient and inconvenient operation.
Innovation Solution
A wired or wireless interface between the hand-held power tool's control electronics and battery pack allows for the transmission and storage of locking data, integrating the battery pack into the theft protection system, enabling active theft protection without the need for sophisticated electronics in the battery pack, and allowing for energy-saving operation of external transceiving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external transceiving device is provided for continuous code signal transmission, then theft protection is improved, but portability and battery life are worsened
Solution Approach 1:
The patent implements periodic authorization checks where the hand-held power tool requests authorization codes at predetermined time intervals or under specific conditions (startup, battery change) rather than requiring continuous transmission. This allows the external transceiving device to operate intermittently, significantly extending battery life while maintaining effective theft protection.
Solution Approach 2:
The battery pack is integrated into the theft protection system, with locking data stored in its memory device. The battery pack actively participates in authorization verification by providing stored locking data to the control electronics, reducing the need for continuous external device operation and enabling the system to protect itself autonomously.
2Reliability
If locking data is stored only in the hand-held power tool, then device complexity is reduced, but theft protection reliability is worsened
Solution Approach 1:
The patent divides the theft protection system into two functional segments: the hand-held power tool contains the transceiving device and control electronics for communication and verification, while the battery pack contains the memory device for storing locking data. This segmentation distributes complexity across components and enhances security through data redundancy.
Solution Approach 2:
The patent combines the theft protection functionality with the battery pack by integrating a memory device into it. This merging allows the battery pack to serve dual purposes: power supply and security data storage, simplifying the overall system architecture while improving theft protection reliability through redundant data storage.
3Reliability
If code signal transmission is continuous, then authorization reliability is improved, but energy consumption is worsened
Solution Approach 1:
The system performs authorization verification at discrete time intervals or under specific conditions (startup, battery replacement) rather than continuously. The control electronics request authorization codes periodically, allowing the external transceiving device to remain in low-power mode between transmissions, significantly reducing energy consumption while maintaining authorization reliability.
Solution Approach 2:
The battery pack stores locking data in advance in its memory device, prepared for future authorization requests. This preliminary action eliminates the need for continuous data transmission, as the pre-stored data can be quickly retrieved and transmitted only when needed, reducing energy consumption while ensuring authorization reliability.
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
Enhances theft deterrence by allowing the battery pack to be included in the theft protection, reducing the need for continuous power supply in external devices and improving user convenience by enabling intermittent operation and extended battery life.
Implementation Method 1
a transceiving device (12) which can be addressed in a wireless and non-contact fashion
Implementation Method 2
a wired or wireless interface (22) between the control electronics (14) and the battery pack (4)
Data Source
AI summary
The invention relates to a battery-operated electric hand tool device (2) comprising control electronics (14), a wirelessly and contactlessly responding transceiver (12), and a storage unit (16) in which an authorization code is stored, a locked mode of operation and a released mode of operation being distinguishable. In order to improve theft protection, a wire-bound or wireless interface (22) is provided from the control electronics (14) of the electric hand tool device to a battery pack (4) such that locking data can be transmitted from the control electronics (14) of the electric hand tool device (2) to the battery pack (4), be stored in a storage device (24) of the battery pack (4), and be read out of the storage device (24) again.