Adaptive Battery Charging Circuitry for Swelling Management
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Solution Overview
Problem
Battery swelling poses a challenge in consumer electronics and electric vehicles, as it can lead to structural compromise and undesirable device specifications, necessitating effective monitoring and management to accommodate swelling without increasing device size.
Innovation Solution
The development of methods and systems to estimate battery swelling by determining capacity fade and state of health, using relationships formed through charge cycles, and adjusting charging sequences to mitigate swelling, including the use of inductive or capacitive sensors to measure displacement and correlate with swelling data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the device is made larger or thicker to accommodate battery swelling, then the battery swelling is accommodated, but the device specifications become less desirable
Solution Approach 1:
The system performs preliminary monitoring of battery swelling using sensors (capacitive, inductive, or optical) and predictive modeling before the swelling becomes severe. By detecting early signs of swelling through capacity fade relationships and real-time sensor data, the system can take preventive actions such as adjusting charging parameters or notifying users, thereby avoiding the need to design for maximum possible swelling and reducing the required device thickness.
Solution Approach 2:
The system implements continuous feedback monitoring of battery swelling through sensors and predictive algorithms. The swelling data is fed back to the charging management system, which adjusts charging parameters in real-time to prevent further swelling. This closed-loop control allows the device to maintain compact dimensions while actively managing battery swelling throughout its lifecycle.
2Productivity
If conventional charging is used, then charging speed is maintained, but battery swelling increases
Solution Approach 1:
The system dynamically adjusts charging parameters based on real-time battery swelling data and predictive models. The charging current and voltage are continuously optimized to balance charging speed with swelling prevention. When swelling is detected or predicted, the system automatically reduces charging intensity, creating a dynamic charging strategy that adapts to battery condition rather than using fixed conventional charging rates.
Solution Approach 2:
The system changes charging parameters (current, voltage, pulse duration) based on swelling data from sensors and predictive relationships. By modifying these electrical parameters in response to battery condition, the system can maintain acceptable charging speeds while preventing excessive swelling that would occur with conventional fixed-parameter charging.
3Measurement precision
If battery swelling is monitored using sensors, then swelling measurement precision is improved, but device complexity increases
Solution Approach 1:
The system uses sensors (capacitive, inductive, or optical) that can serve multiple functions: monitoring battery swelling, detecting foreign objects, and potentially other device functions. This multi-functionality reduces the need for dedicated swelling sensors, thereby minimizing the increase in device complexity while maintaining measurement precision.
Solution Approach 2:
The system employs predictive modeling and capacity fade relationships as intermediaries between direct physical measurement and swelling estimation. Instead of relying solely on complex direct measurement systems, the patent uses mathematical models that correlate easily measurable parameters (capacity, voltage, current) with swelling, reducing the complexity of the monitoring system while maintaining measurement precision.
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 allows for adaptive charging techniques that reduce battery swelling, extend cycle life, and maintain desired device form factors by correlating capacity retention with acceptable swelling levels, thereby enhancing battery life and safety.
Implementation Method 1
measuring battery swelling using capacitive or inductive sensors
Implementation Method 2
measuring battery swelling using capacitive or inductive sensors
Data Source
AI summary
Disclosed are methods and systems for measuring and managing swelling of rechargeable batteries in situ. Some implementations involve using capacity fade or state of health of rechargeable batteries to estimate swelling of the rechargeable batteries. Some implementations provide methods and systems for measuring battery swelling based on inductive or capacitive coupling between sensors and the battery. Some implementations provide means to manage or reduce swelling of rechargeable batteries by applying adaptive charging with consideration of battery swelling.