Rechargeable Battery Compatibility Control for Fall Damage Prevention
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Solution Overview
Problem
Rechargeable batteries for handheld power tools lack effective protection against damage from falls, as existing control methods do not adequately ensure compatibility and safety thresholds are met before energizing the tool.
Innovation Solution
A control method that activates the rechargeable battery to deliver electrical energy to a handheld power tool only when a system characteristic value, based on both tool and battery properties, meets predefined safety thresholds, allowing the tool to transition from a non-energizing to an energizing state, with parameters like discharge current, voltage, and temperature being considered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rechargeable battery is activated to deliver electrical energy without checking system characteristic values, then the ease of operation is improved, but the reliability deteriorates due to potential damage from falls
Solution Approach 1:
The logic circuit performs preliminary checking of system characteristic values (mass, drop height) before activating the rechargeable battery to deliver electrical energy. This preliminary verification ensures that the battery is only activated when used with suitable handheld power tools, preventing damage from falls while maintaining ease of operation through automatic safety verification
2Reliability
If the rechargeable battery is activated only after verifying system characteristic values meet safety thresholds, then the reliability is improved, but the loss of time increases due to verification processes
Solution Approach 1:
The system performs preliminary verification of system characteristic values (mass, drop height) through automatic communication between the handheld power tool and rechargeable battery before activation. This preliminary checking ensures reliability by preventing unsafe operations while minimizing time loss through automated rather than manual verification processes
3Productivity
If the rechargeable battery allows energy delivery in all operating states, then the productivity is improved, but the object-affected harmful factors increase due to potential damage from falls
Solution Approach 1:
The rechargeable battery dynamically adjusts its energy delivery capability based on verified system characteristic values. The battery is activated to deliver electrical energy only when the system characteristic values (mass, drop height) meet safety thresholds, and remains inactive or restricted when thresholds are not met. This dynamic activation ensures productivity when safe while preventing harmful effects from falls
Data Source
AI summary
Control method for a rechargeable battery that has an interface for communicating with a handheld power tool and for supplying power to the handheld power tool, wherein a machine characteristic value characterizing the handheld power tool is received via the interface of the rechargeable battery, the machine characteristic value representing at least one physical property of the handheld power tool, and the rechargeable battery being activated to deliver electrical energy to the handheld power tool if a logic circuit of the rechargeable battery determines that a system characteristic value, which is based on the machine characteristic value and on a rechargeable battery characteristic value representing a physical property of the rechargeable battery, exceeds or falls short of a predefined safety threshold.