Battery Malfunction Detection via Vibration Response Spectrums

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Solution Overview

Problem

Existing methods for detecting the state of decommissioned electric vehicle batteries are time-consuming and cause damage to the batteries during the charging and discharging characteristic experiments.

Innovation Solution

A battery malfunction detection method that applies a series of vibration signals with different frequencies to the battery using a vibration generation device and collects the corresponding response amplitudes with a response collection device, allowing for quick and non-destructive malfunction determination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional battery charging and discharging equipment is used to detect battery state, then detection can be performed, but the detection process takes a long time and causes damage to the battery

Engineering Contradiction:

Improvebattery state detection accuracyVSAvoiddetection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces the traditional electrochemical charging and discharging testing method with a mechanical vibration-based detection method. By applying vibration signals to the battery and analyzing the vibration response characteristics, the system can quickly identify battery malfunctions without requiring time-consuming electrochemical tests, thus resolving the contradiction between detection accuracy and detection time.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes the fact that different battery states (normal vs. malfunctioning) produce distinct vibration response characteristics. By analyzing changes in vibration frequency, amplitude, or other dynamic characteristics, the system can rapidly detect battery state transitions or anomalies, enabling fast non-destructive detection without prolonged testing.

Inventive Principle:

Principle #36Phase transitions

2Reliability

If traditional battery charging and discharging experiments are performed, then battery state can be detected, but the battery suffers loss or damage

Engineering Contradiction:

Improvebattery state detection accuracyVSAvoidbattery damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent substitutes destructive electrochemical testing with non-invasive mechanical vibration analysis. By using vibration signals that do not stress the battery's chemical components and applying only minimal force through vibration, the system achieves accurate malfunction detection without causing battery degradation or damage, thus eliminating the harmful effects of traditional testing methods.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces vibration signals as an intermediary means to detect battery state. Instead of directly subjecting the battery to stressful electrochemical conditions, the system uses vibration as a mediator that can penetrate the battery structure and elicit characteristic responses from different components (electrodes, separator, case), providing detection information without direct harmful interaction with the battery chemistry.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If multiple charging and discharging experiments are conducted on decommissioned batteries, then comprehensive detection can be achieved, but the batteries are degraded

Engineering Contradiction:

Improvedetection comprehensivenessVSAvoidbattery remaining capacity

Core Design Contradiction:

Measurement precisionVSStrength

Solution Approach 1:

The patent replaces repeated electrochemical cycling tests with a single non-invasive vibration-based detection method. By analyzing the battery's vibration response characteristics, the system can comprehensively assess battery health status, including internal structural integrity and component conditions, without requiring multiple charging and discharging cycles that would degrade battery capacity and strength.

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

Enables rapid and non-destructive detection of battery malfunctions by analyzing the vibration characteristics of the battery, reducing the risk of damage and improving detection efficiency.

Implementation Method 1

a vibration generation device configured to apply a vibration signal to a battery to be detected

Methodology Applied

Scientific EffectVibration: Vibration

Data Source

PatentUS12253408B2Battery malfunction detection by correlating vibrations response spectrums

Publication Date: 2025.03.18 SHENZHEN UNIV

AI summary

A battery malfunction detection method includes: applying a preset number of vibration signals with different frequencies to a battery to be detected through a vibration generation device; collecting a response signal of the battery to be detected through a response collection device, where the response signal includes the preset number of vibration response amplitudes of the battery to be detected; determining whether the battery to be detected is malfunctioning according to the response signal.