Optical Signal Battery Abnormality Detection
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Solution Overview
Problem
Lithium-ion batteries face challenges in detecting abnormalities such as abnormal voltage rises or temperature deviations during use, which can lead to undetected issues in assembled batteries.
Innovation Solution
A lithium-ion battery system with a signal output part in each unit cell that generates optical signals based on the cell's state, a signal receiving part to analyze these signals, and a state determination part to identify abnormal conditions by recognizing patterns indicative of abnormal states, allowing for timely detection of battery abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional voltage and temperature monitoring methods are used in assembled batteries, then abnormality detection capability is limited, but system complexity and wiring requirements increase
Solution Approach 1:
The patent replaces conventional electrical wiring and voltage/temperature sensor systems with an optical signal transmission system. Each unit cell includes a signal output part that generates optical signals representing cell state information, which are transmitted through optical fibers to a central analysis system. This substitution eliminates complex electrical wiring while maintaining reliable abnormality detection capability.
Solution Approach 2:
The patent divides the assembled battery into individual unit cells, each equipped with its own signal output part that independently monitors and transmits optical signals about its state. This segmentation allows each cell to be monitored individually, improving overall system reliability while using simple, standardized optical components that reduce overall complexity.
2Measurement precision
If optical signal patterns are used to represent unit cell states, then abnormality detection accuracy improves, but signal analysis complexity increases
Solution Approach 1:
The patent uses distinct optical signal patterns (analogous to color changes) to represent different unit cell states. Each state corresponds to a specific light emission pattern that can be easily distinguished by the analysis system. This approach improves detection accuracy by providing clear, unambiguous signals while keeping the analysis relatively simple through pattern recognition.
Solution Approach 2:
The optical signals are transmitted in periodic cycles, with each cycle representing a specific time period of unit cell operation. This periodic structure simplifies the analysis by providing regular, predictable signal intervals that make it easier to detect abnormalities through pattern comparison over time.
3Reliability
If individual signal output parts are installed in each unit cell, then monitoring coverage improves, but manufacturing complexity increases
Solution Approach 1:
The patent employs a universal signal output part design that can be installed in any unit cell regardless of its position or specific characteristics. Each signal output part performs the same function of generating optical signals based on cell state, allowing for standardized manufacturing and simplified assembly processes. This universality maintains complete monitoring coverage while reducing manufacturing complexity through standardization.
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 solution enables reliable and efficient detection of battery abnormalities, ensuring the safety and performance of lithium-ion batteries by simplifying the system configuration and reducing the need for complex wiring, thereby improving the reliability of determining the presence or absence of abnormalities in assembled batteries.
Implementation Method 1
the signal output part generates a first optical signal by changing an optical signal pattern during a predetermined unit period in accordance with the state of the unit cell
Implementation Method 2
a signal receiving part for receiving an optical signal output by the signal output part in each of the plurality of battery units
Data Source
AI summary
A lithium-ion battery system which can appropriately determine the presence or absence of an abnormality of a unit cell. It is provided with an assembled battery formed by stacking a plurality of battery units, each of the plurality of battery units including a unit cell consisting of a lithium-ion battery and a signal output part provided in the unit cell; a signal receiving part for receiving an optical signal output by the signal output part in each of the plurality of battery units; an analysis processing part for analyzing the optical signal received by the signal receiving part; and a state determination part for determining that the assembled battery is abnormal in accordance with the analysis result of the analysis processing part.