Lithium plating yog hais txog cov xwm txheej tsis zoo nyob qhov twg lithium eons tsis muaj kev cuam tshuam rau cov txheej txheem ntxiv, tsis txhob ua rau cov txheej txheem hluav taws xob hauv hluav taws xob. Qhov no ua rau muaj kev tsim cov yam ntxwv ntawm cov yam ntxwv nyiaj-grey hlau txheej hlau lossis dendritic lithium muaju nyob rau ntawm anode nto.
Conventionally, roj teeb disassembly tau thawj txoj kev rau kev lees paub lithium plating, tshwj xeeb thaum pom muaj zog lossis pom kev loj hlob dendritic yog tam sim no. Txawm li cas los xij, kev ua kom tsis tau txais kev puas tsuaj cov tswv yim kev puas tsuaj tam sim no ua kom muaj kev tshawb nrhiav tau yog los ntawm kev txheeb xyuas cov khoom siv electrochicical.
Ⅰ. Advanced tsis muaj kev puas tsuaj mus kuaj cov txheej txheem:
1. Voltage profile deconvolution tsom xam
Thaum lub sij hawm tas li tam sim no (CC) Charging Kauj loo, Lithium-ion roj teeb feem ntau ua rau pom kev nkhaus voltage nkhaus rau xeev (soc). Qhov tshwm sim ntawm kev ua neeg npau suav ntawm lub sij hawm colutioneau muaj kev nyuaj siab thaum lub sijhawm them-voltage (CV) them nyiaj ua ib qho kev nyuaj siab ntawm lithium plating. Qhov tshwm sim no tshwm sim vim yog cov khoom siv litatingible ntawm kev ua kom muaj kev cuam tshuam lithium los ntawm kev ua plating kev cuam tshuam thiab muaj peev xwm thim rov qab muaj peev xwm thim rov qab thiab cov hluav taws xob thim rov qab.
2. Kev txheeb xyuas muaj peev txheej (DV \/ DQ)
Tus txheej txheem analytical no suav nrog kev xam cov thawj zaug ntawm voltage nrog rau kev muaj peev xwm (DQ) los txheeb xyuas cov xeeb ceem theem hloov pauv hauv graphite anodes. Lithium plating manifests los ntawm cov kev hloov pauv txawv hauv theem hloov pauv no, suav nrog:
• Peak position displacement (>20MV ua haujlwm qhia tau kev cuam tshuam loj heev)
• Kev siv lub zog (txo qhov ntau qhia qhov ntau qhia tau zoo li kev ua kom muaj qhov sib luag ntawm Kinetics)
• Lub ntsej muag tsw qab distortion (asymmetric broupening cuam tshuam heterogeneous cov tshuaj tiv thaiv kev faib tawm)
3. Electrochemical impedance spectroscopy (Eis) Kev kuaj mob
Lithium plating induces Cov kev hloov tseem ceeb hauv Interfacial tus nqi hloov pauv hloov pauv hluav taws xob:
• Tsim ntawm hluav taws xob cais tawm "kev tso nyiaj lithium" depunits nce ionic thauj khoom
• SEI (khoom siv hluav taws xob hauv tshuab hluav taws xob) txheej Advassase interacase) txheej Advassase intergase ulitable nqi hloov impedance (RCT)
• HEEV HEEV SIMEMIC KAUJ ROOJ NYOB RAU HAUV NYQUATSt PERTS
• Lub caij nyoog nruab nrab ntawm lub caij nyoog deformation deformation muaj kev cuam tshuam lithium depepition-induced hloov chaw
4. Lub sijhawm siv hluav taws xob ultrasonic-ntawm-davhlau (rub) tus xeeb ntxwv
Qhov kev sib txawv ntawm cov txheej txheem acoustic tsim cov txheej txheem lithium-ion roj teeb 'stratified architecture:
• Lub hauv paus taofalation los npaj cov acoustic signatures
• Lithium Deposition tsim Acoustic Impedance Transpontinitities (ΔZ> Qhia Txog Kev Plating Tseem Ceeb)
• ECHO Wetform tsom kwm ntes:
- Kos npe rau attitude attishuation (5-15 db kev hloov)
- Phase shift anomalies (>5 degree sib txawv)
- Time-domain reflection coefficient changes (>8% kev pib)
Cov kev txwv tam sim no:
• Feem ntau siv rau lub hnab kev teeb tsa ntawm tes (txhuas casing hauv prismatic cell ua rau 90% + ultrasonic attenuation)
• Kev kuaj pom tau yooj yim yuav tsum muaj tsawg kawg nkaus 2.8% ntim ntim ntawm nws yog xim hlau lithium
• Yuav tsum muaj cov teeb liab sophisticms (piv txwv li, wavelet transform denoing)
Ⅱ. Ntxiv cov cim qhia tau:
• Cov kev mob siab ua kom muaj kev nyuaj siab (ΔCE> {0. 5% rau ib lub voj voog)
• Qhib cov hluav taws xob voltage (OCV) so kom txaus
• Kev txheeb xyuas voltage (DQ \/ DV) kev nthuav dav
• Lub khob kos npe rau hluav taws xob anomalies thaum lub sijhawm so
Ⅲ. Kev siv cov txheej txheem:
• Tsim cov hauv qab baseline los ntawm thawj zaug tsim mus ncig
• Siv cov kev sib xyaw ntau cov qauv sib xyaw
• Thov siv tshuab kev kawm txog cov qauv lees paub
• Ua cov ntoo khaub lig-kev siv tau nrog siv hluav taws xob ntsuas
This comprehensive approach enables early-stage lithium plating detection with >92% tseeb thaum tswj cov roj teeb kev ncaj ncees, ua rau muaj kev nyab xeeb cov kev nyab xeeb hauv kev tswj hwm roj teeb hauv kev tswj hwm cov roj teeb roj teeb (BMS).
Ⅳ. Txhawb nqa koj cov roj teeb kev nyab xeeb nrog lub zog tob tshiab
NtawmTob Lub Zog Tshiab, Peb tau cog lus tias yog koj tus khub zoo tus khub hauv kev nce qib cia cov thev naus laus zis. Los ntawm high-inticial cov ntaub ntawv canhode thiab cov roj teeb tshwj xeeb, peb muab cov roj teeb electrolytes tsim los txhawb koj cov khoom kom muaj kev ntseeg tau thiab ua haujlwm tau zoo. Peb cov nyiaj txuas mus rau txiav-ntugRoj teeb tsim khoomthiabNtsuas cov roj teeb, ua kom muaj kev sib xyaw ua ke ntawm txhua theem ntawm cov roj teeb ntau lawm. Nrog rau kev ua kom pom tseeb, kev sib zog, thiab kev sib koom tes tsim kho, peb xa cov kev daws teeb meem uas hloov kho kom haum rau kev lag luam xav tau. Txawm hais tias koj ua kom zoo tsim qauv lossis tho kev tsim hluav taws xob tom ntej no, peb pab pawg muaj nyob ntawm no los txhawb koj cov hom phiaj nrog kev txawj ntse thiab teb cov kev pabcuam.
Cia peb tsim lub neej yav tom ntej ntawm lub zog cia ua ke. Hu rau peb hnub no tshawb nrhiav li cas peb cov kev sib xyaw ua tau zoo li koj txoj kev vam meej.
