Aerosol Generator Battery Charging Control Under Temperature Limits
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Solution Overview
Problem
Existing electrically heated aerosol-generating systems face inefficiencies and risks in charging and discharging processes due to inadequate temperature-based control of power supply, potentially damaging rechargeable batteries.
Innovation Solution
Implementing a method and system that monitor ambient temperature to adjust charging and discharging currents within specific temperature ranges, using weighted averages to optimize power supply and prevent excessive currents, thereby protecting the rechargeable power supplies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high charging current is used to charge the rechargeable power supply quickly, then charging speed is improved, but the risk of damaging the battery due to excessive current increases
Solution Approach 1:
The charging current is made dynamic rather than fixed. The system continuously monitors ambient temperature and adjusts the charging current accordingly - using higher currents (e.g., 0.2C or 1C) when temperature is within the optimal range (10°C to 45°C), and reducing or preventing charging when temperature is too low (0°C to 10°C) or too high (above 45°C). This dynamic adjustment resolves the contradiction by enabling fast charging when safe and preventing damage when conditions are unfavorable.
Solution Approach 2:
The system implements temperature feedback control by continuously monitoring ambient temperature and using this information to regulate charging current. The controller receives temperature data and automatically adjusts charging parameters - increasing current when temperature is optimal and reducing or stopping charging when temperature is extreme. This feedback mechanism ensures both fast charging capability and battery protection, resolving the contradiction between charging speed and safety.
2Reliability
If charging current is reduced to protect the battery, then battery safety is improved, but charging efficiency decreases
Solution Approach 1:
The system changes the charging current parameter based on temperature conditions. Instead of using a fixed conservative current that would always prioritize safety over speed, the system adjusts the current parameter dynamically - using higher currents (0.2C, 1C) when temperature is within the optimal range (10°C to 45°C) and lower or zero current when temperature is extreme. This parameter adjustment resolves the contradiction by achieving both safety and efficiency under appropriate conditions.
3Productivity
If fast charging is enabled regardless of temperature, then charging speed is improved, but the risk of battery damage in extreme temperatures increases
Solution Approach 1:
The system takes preliminary action by monitoring ambient temperature before initiating or adjusting charging. The temperature monitoring and control logic prevents fast charging from starting in extreme temperature conditions (below 0°C or above 45°C) and adjusts charging parameters before temperature-related damage can occur. This preliminary protection resolves the contradiction by enabling fast charging when safe and preventing temperature-related damage before it can happen.
Data Source
Figure 1(a)~1(b)
Figure 2
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AI summary
The present invention relates to a controller for recharging a rechargeable power supply of an electrically heatable aerosol-generating system, wherein the controller is configured to: provide a charging current of less than about 0.1 C to the rechargeable power supply when a temperature reading is within a first pre-determined range, provide a charging current of greater than about 0.1 C to the rechargeable power supply when the temperature reading is within a second pre-determined range, and prevent charging of the rechargeable power supply when the temperature reading is above a pre-determined temperature. The invention further relates to a method for recharging a rechargeable power supply of an electrically heatable aerosol-generating system.