Adaptive Battery Charging Profiles Under Dynamic Device Loads
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Solution Overview
Problem
Existing battery charging systems do not effectively adapt to the dynamic conditions of a battery during normal operation of a device, leading to inefficient charging and potential battery degradation.
Innovation Solution
A system that monitors parameters such as impedance and condition of the battery during simultaneous charging and discharging, adapting the charging profile based on these measurements to optimize battery health and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed charging profile is used for battery charging, then the charging process is simple and easy to control, but the charging efficiency is low and battery degradation occurs due to inability to adapt to dynamic battery conditions
Solution Approach 1:
The charging profile is transformed from a fixed static pattern to a dynamic adaptive profile that continuously adjusts charging parameters based on real-time battery conditions. The system monitors battery impedance, temperature, and charge/discharge currents dynamically, then modifies charging voltage and current accordingly to optimize charging efficiency while preventing battery degradation.
Solution Approach 2:
The system implements a feedback mechanism where battery parameters (impedance, temperature, current) are continuously monitored during charging operations. This feedback information is used to adjust the charging profile in real-time, creating a closed-loop control system that adapts to changing battery conditions and optimizes charging performance.
2Reliability
If the battery is monitored continuously during normal operation to determine impedance and condition, then battery health is optimized and charging is adapted appropriately, but the system complexity and power consumption increase
Solution Approach 1:
The monitoring system is integrated into the existing power management circuitry of the portable device, allowing the same hardware components to serve dual purposes: normal power management functions and battery health monitoring. This eliminates the need for separate dedicated monitoring hardware, reducing overall system complexity while maintaining continuous surveillance of battery conditions.
Solution Approach 2:
The battery monitoring system utilizes the device's own operational characteristics (charge and discharge currents during normal use) to gather diagnostic information about battery condition. By analyzing parameters already present during normal operation, the system determines impedance and health status without requiring external testing equipment or additional active components.
3Loss of time
If impedance measurement is performed during simultaneous charging and discharging, then accurate battery condition assessment is achieved without interrupting device operation, but measurement precision may be compromised due to dynamic load conditions
Solution Approach 1:
The system performs preliminary characterization of battery impedance by analyzing the relationship between charge/discharge currents and voltage during normal operation. By continuously tracking these parameters throughout the battery's charge/discharge cycles, the system builds an accurate impedance profile without requiring separate measurement phases, thus avoiding interruptions while maintaining measurement accuracy.
Solution Approach 2:
Instead of attempting to measure impedance under ideal static conditions, the system accepts and utilizes the dynamic, partially disturbed conditions during simultaneous charging and discharging. By processing the noisy, variable current conditions present during normal operation, the system extracts accurate impedance information that reflects real-world battery behavior, achieving sufficient precision for adaptive charging control.
Data Source
AI summary
A method of adapting a battery charging profile of a battery may include monitoring one or more parameters associated with the battery during normal operation of a device powered from the battery and while the battery is simultaneously charged by a charger and is discharged by a dynamic system load of the device, determining an impedance of the battery based on the one or more parameters, determining a condition of the battery based on the impedance and the one or more parameters, and adapting the battery charging profile based on the condition.