Adaptive Battery Management via DC Resistance Assessment
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Solution Overview
Problem
Portable electronic devices, such as e-book readers, face challenges with limited battery life due to smaller battery sizes, leading to frequent recharging needs, and difficulties in accurately measuring remaining battery capacity, especially with digital devices experiencing high current spikes that cause voltage drops and premature shutdowns.
Innovation Solution
Implementing adaptive battery management systems that periodically assess battery capacity by determining DC resistance values, adjusting threshold levels based on temperature, state of charge, and charge cycles to initiate power-saving modes, such as reducing display brightness or switching to lower power operations, to extend battery life without increasing device size or weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery capacity is increased to extend battery life, then the battery life is improved, but the device weight and thickness increase
Solution Approach 1:
The patent implements adaptive battery management that dynamically adjusts device operating parameters based on real-time battery capacity assessment. The system monitors battery voltage, current, and temperature to evaluate remaining capacity and automatically modulates power consumption to extend battery life without requiring a larger battery physically
Solution Approach 2:
The system changes operating parameters such as display brightness, processor speed, and power management policies based on assessed battery capacity. By adjusting these parameters dynamically, the device maximizes usage duration from a fixed battery size, effectively extending battery life without increasing physical battery capacity
2Duration of action of moving object
If the battery capacity is increased to extend battery life, then the battery life is improved, but the device thickness increases
Solution Approach 1:
The adaptive battery management system dynamically adjusts operating parameters based on real-time battery capacity assessment, allowing the same thin battery to provide extended usage duration through intelligent power management rather than physical expansion
Solution Approach 2:
The system modifies power consumption parameters dynamically, enabling extended battery life from a thin battery design by optimizing the electrical characteristics and power delivery profile rather than increasing physical battery dimensions
3Ease of operation
If current spikes are allowed to occur during device operation, then device functionality is maintained, but voltage drops cause premature shutdowns
Solution Approach 1:
The system performs preliminary battery capacity assessment by monitoring voltage, current, and temperature before and during high-power operations. This advance evaluation allows the system to prepare appropriate power management responses to prevent voltage drops from causing premature shutdowns
Solution Approach 2:
The adaptive battery management system continuously monitors battery voltage, current, and temperature, using this feedback to assess remaining capacity and adjust operating parameters in real-time. This closed-loop control prevents voltage drops from triggering premature shutdowns while maintaining device functionality
4Measurement precision
If precise measurement of remaining battery capacity is implemented, then battery management accuracy is improved, but measurement complexity increases
Solution Approach 1:
The battery management system uses the device's own existing sensors and processing capabilities to perform self-assessment of battery capacity. By utilizing readily available voltage, current, and temperature data from the device's normal operation, the system achieves accurate capacity measurement without adding complex external measurement equipment
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 approach effectively extends battery life in portable devices by accurately assessing remaining capacity and reducing power consumption through adaptive power-saving measures, preventing premature shutdowns and maintaining device functionality over longer periods.
Implementation Method 1
determining a DC resistance value of the battery cell during execution of the power-consuming operation
Data Source
AI summary
Systems and methods are provided for optimizing battery life in an electronic device. The device is configured to make periodic assessments of battery capacity by measuring the DC resistance value of the battery cell. The temperature of the battery cell and/or other characteristics of the device are used to determine a threshold DC resistance level. If the measured DC resistance value reaches a determined threshold level, the device can initiate a power-saving mode in which an operating parameter of the device is adjusted to decrease power consumption.