Battery Abnormality Detection via Voltage Decay Measurement

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Solution Overview

Problem

Existing electronic devices face challenges in quickly determining whether a battery is abnormal, as current methods require significant time to measure leakage current, which can take several hours.

Innovation Solution

An electronic device with a power interface, a battery, a system circuit, a resistor, and switches, along with a power management circuit that connects the battery to an external power source, then to a resistor to verify electrical characteristics, determining battery abnormality based on these characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If leakage current measurement is performed using conventional methods, then battery abnormality can be detected, but testing time is excessively long (several hours)

Engineering Contradiction:

Improvebattery abnormality detectionVSAvoidtesting time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs preliminary charging of the battery to a full state before conducting the leakage current measurement. This preliminary preparation ensures the battery is in a known initial state (fully charged), which allows for more efficient and accurate subsequent measurement. By pre-establishing the battery's charge state, the system avoids the need for lengthy charging periods during the actual testing phase, thereby reducing total testing time while maintaining detection reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the measurement parameters by switching from conventional leakage current measurement methods to a method that measures voltage decay characteristics after disconnecting the charging power source. Instead of measuring small leakage currents directly over extended periods, the system measures the rate of voltage change (dV/dt) during self-discharge, which provides equivalent diagnostic information in a much shorter time frame. This parameter transformation enables rapid battery health assessment.

Inventive Principle:

Principle #35Parameter changes

2Loss of time

If battery testing is performed rapidly, then testing time is reduced, but measurement precision may be compromised

Engineering Contradiction:

Improvetesting timeVSAvoidleakage current measurement accuracy

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The patent replaces direct electrical measurement of leakage current with a voltage-based measurement system. Instead of using sensitive current measurement equipment to detect small leakage currents over long periods, the system measures voltage changes across the battery terminals during controlled discharge. This substitution of measurement methodology enables rapid testing while maintaining precision, as voltage measurements can be taken quickly with high accuracy using standard ADC converters, avoiding the need for lengthy current integration measurements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method allows for rapid detection of battery abnormality, reducing testing time from hours to minutes, enabling timely battery management and preventing potential issues like overheating or fire.

Implementation Method 1

a battery (1196) and may be powered by the battery

Methodology Applied

Scientific EffectBattery (electricity): Battery (electricity)

Implementation Method 2

verifying an electrical characteristic of a current applied to the resistor

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS10298045B2Electronic device for checking battery abnormality and control method thereof

Publication Date: 2019.05.21 SAMSUNG ELECTRONICS CO LTD

AI summary

A method of controlling an electronic device is provided which includes electrically connecting a battery with an external power source using a first switch such that a first portion of a first current supplied from the external power source is supplied to a system circuit of the electronic device and a second portion of the first current is supplied to the battery, determining whether a specified condition is satisfied, electrically disconnecting the battery from the external power source using the first switch and electrically connecting the battery with a resistor using a second switch, if the specified condition is satisfied, verifying an electrical characteristic of a current applied to the resistor while the battery is electrically disconnected from the external power source and is electrically connected with the resistor, and determining whether an operation of the battery is abnormal, based at least on a part of the electrical characteristic.