Lithium battery thermal runaway early warning system and method based on cavity ring-down spectroscopy technology

The invention discloses a lithium battery thermal runaway early warning system and method based on a cavity ring-down spectroscopy technology. The system comprises an intermediate infrared quantum cascade laser, an optical isolator, a collimating lens, an optical resonant cavity, a focusing mirror,...

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Hauptverfasser: CHEN DA, HAO CHAOLONG, ZHANG QINGSONG, ZHANG WEI
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creator CHEN DA
HAO CHAOLONG
ZHANG QINGSONG
ZHANG WEI
description The invention discloses a lithium battery thermal runaway early warning system and method based on a cavity ring-down spectroscopy technology. The system comprises an intermediate infrared quantum cascade laser, an optical isolator, a collimating lens, an optical resonant cavity, a focusing mirror, a photoelectric detector and a main control unit. The quantum cascade laser outputs laser with characteristic gas absorption wavelength, and the laser passes through the optical isolator, is adjusted and coupled by the collimating lens and enters the measuring cavity; after multiple times of reflection, resonance is generated, and a laser beam is output and reaches a photoelectric detector after being focused by a focusing mirror; when the photoelectric detector detects the laser with the set intensity, the main control unit turns off the optical isolator, and the concentration of the detected characteristic gas is calculated by detecting the time interval of the output laser attenuating to the set intensity. The s
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The system comprises an intermediate infrared quantum cascade laser, an optical isolator, a collimating lens, an optical resonant cavity, a focusing mirror, a photoelectric detector and a main control unit. The quantum cascade laser outputs laser with characteristic gas absorption wavelength, and the laser passes through the optical isolator, is adjusted and coupled by the collimating lens and enters the measuring cavity; after multiple times of reflection, resonance is generated, and a laser beam is output and reaches a photoelectric detector after being focused by a focusing mirror; when the photoelectric detector detects the laser with the set intensity, the main control unit turns off the optical isolator, and the concentration of the detected characteristic gas is calculated by detecting the time interval of the output laser attenuating to the set intensity. 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subjects BASIC ELECTRIC ELEMENTS
COLORIMETRY
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
RADIATION PYROMETRY
TESTING
title Lithium battery thermal runaway early warning system and method based on cavity ring-down spectroscopy technology
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