Battery Charge Voltage Control for Thermal Stress and Swelling
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Solution Overview
Problem
Battery swelling issues due to temperature sensitivity in information handling systems, leading to performance degradation and reliability concerns.
Innovation Solution
A method to manage thermal stress by determining a degradation factor based on battery parameters, calculating thermal stress time, and adjusting the charge voltage when thresholds are exceeded to prevent swelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery operates at elevated temperatures, then the chemical reactions proceed faster and power output increases, but undesired reactions generate gas causing battery swelling
Solution Approach 1:
The patent dynamically adjusts charging parameters (current and voltage) based on real-time temperature monitoring and battery state estimation. When temperature exceeds thresholds or swelling risk is detected, the system modifies charging parameters to reduce thermal stress and prevent gas generation, thereby resolving the contradiction between maintaining power output and preventing swelling.
Solution Approach 2:
The system implements continuous monitoring of battery temperature, voltage, and state of charge, using this feedback to dynamically adjust charging parameters. The control algorithm processes real-time data and modifies charging current/voltage to prevent thermal runaway and swelling while maximizing power delivery, thus resolving the power-output-versus-swelling contradiction.
2Productivity
If fast charging is applied to increase productivity, then charging time is reduced, but thermal stress increases leading to accelerated degradation
Solution Approach 1:
The patent employs dynamic charging parameter adjustment based on real-time battery state estimation. The system continuously monitors temperature, voltage, and state of charge, adapting charging current and voltage profiles on-the-fly to prevent thermal stress accumulation. This dynamic approach enables fast charging when conditions permit while protecting battery lifespan when thermal stress becomes excessive, resolving the productivity-reliability contradiction.
Solution Approach 2:
The system performs preliminary thermal management and state estimation before initiating fast charging sequences. By predicting thermal stress accumulation and battery state in advance, the system pre-adjusts charging parameters to prevent degradation before it occurs, enabling safe fast charging that maintains both productivity and reliability.
3Reliability
If continuous monitoring of battery parameters is implemented to improve reliability, then swelling can be detected earlier, but system complexity increases
Solution Approach 1:
The patent integrates multiple monitoring functions (temperature sensing, voltage measurement, state of charge estimation, thermal stress calculation) into a unified battery management system. This multi-functional approach detects swelling risks through综合分析 of multiple parameters while avoiding the need for separate dedicated systems, thus improving reliability without proportionally increasing complexity.
Solution Approach 2:
The system uses the battery's own operational parameters (voltage, current, temperature) to self-diagnose swelling conditions through state estimation algorithms. By leveraging existing sensor data and computational algorithms rather than requiring additional external monitoring equipment, the system achieves reliable swelling detection with minimal added complexity.
Data Source
AI summary
Managing a battery of an information handling system, including determining a degradation factor of the battery based on one or more parameters of the battery; determining a first thermal stress time of the battery over a first time period, including: identifying a voltage of the battery over the first time period; identifying a temperature of the battery over the first time period; calculating the first thermal stress time of the battery over the first time period based on the voltage and the temperature of the battery over the first time period; comparing the first thermal stress time of the battery of the first time period to a time threshold, the time threshold based on the degradation factor of the battery; determining, based on the comparison, that the first thermal stress time of the battery is greater than the time threshold, and in response, adjusting a charge voltage of the battery.