Battery Charge-State Timing for Abnormality Diagnosis
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Solution Overview
Problem
Existing methods for detecting abnormal lithium-ion battery conditions in electronic devices are sensitive to environmental factors and have low accuracy, leading to potential explosions or fires due to overcharge, internal shorts, or high temperatures.
Innovation Solution
An electronic device with a power management module that monitors the battery's charge state, identifies the time taken to change from a designated state to another, and determines abnormality based on this time, allowing for timely intervention to prevent accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods measure specific functions based on power and deterioration degree to determine battery abnormality, then the battery protection function is provided, but the accuracy falls due to sensitivity to environment (temperature, current consumption difference for each event)
Solution Approach 1:
The patent changes the detection parameter from power-based measurements to time-based measurements. Specifically, it measures the time required for the battery voltage to change between two designated states (first designated state and second designated state). This time parameter is less sensitive to environmental factors like temperature and current consumption variations, thereby improving measurement precision while maintaining battery protection functionality.
2Object-affected harmful factors
If the electronic device provides protection through overcharge prevention, overdischarge prevention, and charge blocking according to battery temperature, then the explosion prevention function is provided, but the detection accuracy falls due to environmental sensitivity
Solution Approach 1:
The patent replaces temperature-based and power-based detection parameters with time-based parameters. By measuring how long it takes for the battery voltage to transition between designated states, the system achieves more accurate abnormality detection that is not affected by temperature fluctuations or varying current consumption, thereby improving both detection accuracy and explosion prevention reliability.
3Reliability
If the electronic device determines battery abnormality by measuring specific function based on power, then the protection function is provided, but the accuracy falls due to current consumption difference for each event
Solution Approach 1:
The patent transitions from measuring power-based parameters to measuring time-based parameters. The time required for voltage change between designated states is measured, which remains consistent regardless of current consumption variations caused by different device events. This resolves the contradiction by maintaining protection functionality while eliminating accuracy degradation due to varying current consumption.
Data Source
AI summary
Various embodiments of the present invention relate to an electronic device for diagnosing a battery, and the electronic device may include a battery; and a power management module operatively connected with the battery, and including a charging circuit which controls charge of the battery, wherein the power management module is configured to monitor a charge state of the battery, if the battery reaches a first designated state, identify a time taken to change from the first designated state to a second designated state, and determine whether the battery is abnormal, based at least in part on the identified time. Other various embodiments are possible.