Battery Charging Circuitry Temperature-Adaptive Voltage Control
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Solution Overview
Problem
Conventional rechargeable battery charging methods fail to optimize battery lifespan and performance, particularly in portable electronic devices like hearing aids and headphones, due to inefficiencies in charge voltage and current management based on environmental temperature and battery state.
Innovation Solution
A method and system that utilize a temperature sensor to calculate a constant charge voltage and current for rechargeable batteries, adjusting charging strategies based on environmental temperature and initial state of charge to optimize charging performance, including multi-zone charging techniques to prevent undercharging and extend battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charging methods are used, then charging simplicity is maintained, but battery lifespan and performance are not optimized
Solution Approach 1:
The charging system dynamically adjusts charge voltage and current based on real-time temperature measurements and battery state assessments. The charging parameters are not fixed but adapt continuously during the charging process, allowing the system to optimize battery lifespan while managing complexity through automated control algorithms.
Solution Approach 2:
The system changes charging parameters (voltage and current) based on temperature conditions and battery state. By modifying these electrical parameters dynamically, the system improves battery reliability and lifespan without requiring complex hardware changes, as the adjustments are made through software-controlled parameter modification.
2Productivity
If fixed charge voltage is used, then charging process is simple, but battery performance and capacity are not optimized
Solution Approach 1:
The system modifies charge voltage and current parameters based on temperature readings and battery state assessments. This dynamic parameter adjustment improves charging efficiency and battery performance by preventing undercharging and optimizing charge acceptance, while the complexity is managed through integrated control circuitry that automatically implements these changes.
Solution Approach 2:
The charging system incorporates feedback mechanisms where temperature sensors continuously monitor conditions and feed this information back to the charge controller. The controller uses this feedback to adjust charging parameters in real-time, improving productivity through optimized charging while managing complexity through closed-loop control systems.
3Reliability
If temperature-independent charging is used, then device simplicity is maintained, but battery aging effects are accelerated
Solution Approach 1:
The system changes charging parameters based on temperature conditions to counteract aging effects. By adjusting voltage and current according to temperature, the system extends battery cycle life and reliability, while the ease of operation is maintained through automated temperature-based control that requires no user intervention.
Solution Approach 2:
The system takes preliminary actions to counteract harmful temperature effects before they can damage the battery. By proactively adjusting charging parameters based on temperature readings, the system prevents thermal degradation and extends battery life, while maintaining operational simplicity through automatic protection mechanisms.
Data Source
AI summary
A method for charging a rechargeable battery comprises estimating an initial state of charge of the battery (SOC0), which may be estimated based on a time to polarization or an initial voltage of the battery. The method also comprises charging the battery according to a first charging strategy if the initial state of charge (SOC0) is greater than a threshold state of charge (SOCX) and according to a second charging strategy if the initial state of charge (SOC0) is less than the threshold state of charge (SOCX). The first charging strategy comprises charging, by charging circuitry, the battery at a temperature-independent constant charge voltage (CVXT) and at a first current (I1) with power provided from a power source in electrical communication with the charging circuitry. The second charging strategy comprises obtaining, by the charging circuitry, an environmental temperature (TE) measured by a temperature sensor in communication with the charging circuitry; calculating, by the charging circuitry, a temperature-based constant charge voltage (CVT) based on the environmental temperature (TE); and charging, by the charging circuitry, the battery at the temperature-based constant charge voltage (CVT) and at a second current (I2) with power provided from the power source.