Aerosol Vaporiser Battery Replacement Indication by Voltage Tracking
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Solution Overview
Problem
Aerosol-generating devices that heat aerosol-forming substrates face challenges due to battery aging, which affects the properties of the aerosol produced, making it difficult for users to determine when battery replacement is necessary.
Innovation Solution
The device includes a control circuit that measures the battery voltage, generates error signals when the voltage drops below a threshold, and updates a usage record. If the number of error signals exceeds a threshold value, the control circuit activates a replacement indicator, signaling to the user that the battery needs replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device uses a battery with finite life, then the device can operate portably, but the battery capacity reduces over time causing changes in aerosol properties
Solution Approach 1:
The control circuit proactively monitors battery voltage across multiple operation cycles and stores error signals before the battery completely fails. By detecting voltage drops below threshold values during operation cycles and accumulating error signals in memory, the system prepares for battery replacement before performance degradation becomes critical, maintaining aerosol property consistency throughout the battery's operational life.
Solution Approach 2:
The system continuously monitors battery voltage during operation cycles and provides feedback through the replacement indicator. The control circuit measures voltage, compares it to threshold values, stores error signals in memory, and activates the indicator when error signals exceed a threshold count. This closed-loop feedback mechanism allows the device to track battery health and alert users proactively, ensuring aerosol properties remain consistent until replacement is needed.
2Measurement precision
If the device monitors battery voltage continuously, then it can detect battery aging, but the device complexity increases
Solution Approach 1:
The monitoring function is segmented into discrete operation cycles rather than continuous monitoring. The control circuit measures battery voltage at specific intervals corresponding to operation cycles, stores results in memory as error or no-error signals, and evaluates accumulated errors periodically. This segmentation reduces computational complexity while maintaining sufficient measurement precision to detect battery aging trends.
3Reliability
If the device provides clear battery replacement indication, then user experience remains consistent, but the device requires additional components
Solution Approach 1:
The replacement indicator serves multiple functions: it acts as an LED display element, a battery health status indicator, and a replacement alert mechanism. The same control circuit that monitors voltage and stores error signals also manages the indicator activation. This multi-functionality approach provides clear replacement indication while minimizing additional hardware requirements.
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
This solution effectively mitigates the change in aerosol properties due to battery aging by providing a clear indication to the user when battery replacement is required, thus ensuring a consistent user experience.
Implementation Method 1
the control circuit is configured to: measure a voltage across the battery; compare the measured voltage across the battery to a threshold voltage
Implementation Method 2
a vaporiser configured to vaporise an aerosol-forming substrate
Data Source
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AI summary
An aerosol generating device comprising a vaporiser configured to vaporise an aerosol-forming substrate; a battery connected to the vaporiser; a control circuit for controlling the supply of power from the battery to the vaporiser; a memory for storing a usage record of the device; and a replacement indicator for signalling to a user. The control circuit is configured to compare a measured voltage across the battery to a threshold voltage and to generate an error signal to update the usage record if the measured voltage is less than the threshold voltage during an operation cycle. The control circuit is configured to access the usage record and to activate the replacement indicator depending on the status of the usage record.