Nkag siab txog lithium roj teeb kev nyab xeeb technology los ntawm peb yam: khoom siv, tsim thiab txheej txheem
Kev phom sij ntawm lithium-ion roj teeb
Cov roj teeb lithium-ion yog cov khoom siv hluav taws xob muaj peev xwm txaus ntshai vim lawv cov yam ntxwv ntawm cov tshuaj lom neeg thiab cov kab ke.
(1). Cov tshuaj lom neeg ua haujlwm siab
Lithium yog ib qho tseem ceeb ntawm pawg I hauv lub sijhawm thib ob ntawm lub sijhawm ntawm cov ntsiab lus thiab muaj cov tshuaj lom neeg muaj zog heev.
(2). Siab zog ceev
Cov roj teeb lithium-ion muaj lub zog tshwj xeeb heev (Ntau dua lossis sib npaug ntawm 140 Wh / kg), ob peb zaug ntawm cov roj teeb nruab nrab xws li nickel-cadmium thiab nickel-hydrogen. Cov tshuaj tiv thaiv thermal runaway tso tawm cua sov thiab tuaj yeem ua rau tus cwj pwm tsis zoo.
(3). Siv cov organic electrolyte system
Cov kuab tshuaj organic ntawm cov organic electrolyte system yog hydrocarbon, uas muaj qhov tsis tshua muaj hluav taws xob decomposition thiab nquag oxidation. Cov kuab tshuaj kuj yog flammable; lub roj teeb yuav ntes hluav taws, hlawv, lossis tawg yog tias muaj dej ntws tawm.
(4). Muaj feem ntau ntawm cov tshuaj tiv thaiv sab
Thaum lub sij hawm ib txwm siv ntawm lithium-ion roj teeb, tshuaj muaj txiaj ntsig zoo nyob rau hauv uas hluav taws xob thiab tshuaj lom neeg lub zog hloov mus rau ib leeg yog nqa tawm sab hauv. Txawm li cas los xij, nyob rau hauv qee qhov xwm txheej, xws li overcharging, over-discharge, los yog over-tam sim no ua hauj lwm, nws yog ib qho yooj yim ua rau cov tshuaj sab hauv lub roj teeb. Thaum cov tshuaj tiv thaiv sab no hnyav zuj zus, nws yuav cuam tshuam rau kev ua haujlwm thiab kev pabcuam lub neej ntawm lub roj teeb. Cov pa roj ntau yuav raug tsim tawm, ua rau lub siab hauv lub roj teeb kom nrawm nrawm thiab tom qab ntawd tawg thiab ntes hluav taws, ua rau muaj teeb meem kev nyab xeeb.
(5). Cov qauv ntawm cov khoom siv electrode tsis ruaj khov
Cov tshuaj tiv thaiv overcharging ntawm lithium-ion roj teeb yuav hloov cov qauv ntawm cov khoom siv cathode, ua rau cov khoom muaj zog oxidation thiab ua rau cov kuab tshuaj nyob rau hauv cov electrolyte muaj zog oxidation. Cov nyhuv no yog irreversible, thiab yog hais tias lub tshav kub tshwm sim los ntawm cov tshuaj tiv thaiv accumulates, muaj kev pheej hmoo ntawm thermal runaway.
Kev tshuaj xyuas qhov ua rau muaj teeb meem kev nyab xeeb hauv cov khoom siv roj teeb lithium-ion
Tom qab 30 xyoo ntawm kev tsim kho kev lag luam ntawm cov khoom siv roj teeb lithium-ion, kev siv tshuab kev nyab xeeb tau ua tiav zoo, tswj tau qhov tshwm sim ntawm kev cuam tshuam sab hauv lub roj teeb thiab ua kom muaj kev nyab xeeb ntawm roj teeb. Txawm li cas los xij, vim tias cov roj teeb lithium-ion tau siv ntau thiab ntau dua thiab lawv lub zog ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom tau siv ntau xyoo dhau los. Peb sau cov ntsiab lus tseem ceeb ua rau muaj teeb meem kev nyab xeeb hauv cov khoom siv roj teeb lithium-ion raws li hauv qab no:
1. Cov teeb meem ntawm cov khoom siv roj teeb
Cov ntaub ntawv siv hauv cov tub ntxhais roj teeb muaj xws li cov khoom siv zoo, cov khoom siv tsis zoo, cov khoom sib cais, electrolyte thiab plhaub, thiab lwm yam. Kev xaiv cov khoom siv thiab kev sib txuam ntawm cov txheej txheem tsim los txiav txim siab txog kev nyab xeeb ntawm lub roj teeb tseem ceeb. Thaum xaiv cov khoom siv zoo thiab tsis zoo thiab cov khoom sib cais, cov chaw tsim khoom tsis tau ua qee qhov kev ntsuam xyuas ntawm cov yam ntxwv thiab kev sib txuam ntawm cov khoom siv raw, uas ua rau muaj qhov tsis zoo hauv kev nyab xeeb ntawm cov roj teeb.
2. Cov txheej txheem ntau lawm cov teeb meem
Cov ntaub ntawv raw ntawm cov roj teeb hlwb tsis raug kuaj nruj me ntsis. Qhov chaw tsim khoom tsis zoo, uas ua rau kev sib xyaw ntawm impurities hauv kev tsim khoom, uas tsis tsuas yog muaj qhov tsis zoo ntawm lub peev xwm ntawm lub roj teeb, tab sis kuj muaj kev cuam tshuam zoo rau kev nyab xeeb ntawm lub roj teeb; Tsis tas li ntawd, yog tias sib xyaw ntau dhau rau hauv cov electrolyte Moisture yuav ua rau muaj kev cuam tshuam sab hauv kom nce lub siab ntawm lub roj teeb, cuam tshuam rau kev nyab xeeb; vim muaj kev txwv nyob rau hauv cov txheej txheem ntau lawm, cov khoom tsis tuaj yeem ua tau zoo sib xws thaum lub sij hawm tsim cov txheej txheem ntawm cov roj teeb, xws li tsis zoo flatness ntawm lub hauv paus electrode, teeb meem xws li poob ntawm electrode active cov ntaub ntawv, sib tov ntawm lwm yam impurities nyob rau hauv cov ntaub ntawv nquag. , tsis muaj zog tab welding, tsis ruaj tsis khov vuam kub, burrs ntawm cov npoo ntawm ncej, thiab tsis siv cov ntaub nplaum insulating ntawm qhov tseem ceeb yuav cuam tshuam rau kev nyab xeeb ntawm lub roj teeb tub ntxhais. Cov teebmeem tsis zoo.
3. Lub roj teeb tseem ceeb tsim tsis raug thiab txo kev nyab xeeb kev ua haujlwm
Hais txog kev tsim qauv, ntau lub ntsiab lus tseem ceeb uas muaj kev cuam tshuam rau kev nyab xeeb tsis raug coj los ntawm cov tuam txhab tsim khoom, xws li tsis muaj cov ntaub nplaum insulating hauv cov ntsiab lus tseem ceeb, cov qauv sib cais tawm tsis muaj npoo los yog cov npoo tsis txaus, qhov zoo thiab qhov tsis zoo electrode muaj peev xwm. ratio tsim tsis tsim nyog, thiab qhov zoo thiab tsis zoo electrode kev ua ub no Cov khoom siv cheeb tsam piv tsim yog tsis tsim nyog, tab ntev tsim yog tsis tsim nyog, thiab lwm yam, uas tej zaum yuav ua rau muaj kev phom sij rau kev nyab xeeb ntawm lub roj teeb. Tsis tas li ntawd, nyob rau hauv cov txheej txheem ntawm cov roj teeb, kom txuag tau cov nqi thiab txhim kho kev ua haujlwm, qee cov tuam txhab roj teeb sim txuag thiab compress cov ntaub ntawv raw, xws li txo cov diaphragm cheeb tsam, thinning tooj liab ntawv ci, thiab aluminium ntawv ci, thiab tsis siv lub siab nyem li qub. thiab insulating tapes, thiab lwm yam., cov no yuav txo qhov kev nyab xeeb ntawm lub roj teeb.
4. Lub zog ceev yog siab dhau
Lub khw tab tom nrhiav cov khoom siv roj teeb uas muaj peev xwm ntau dua. Txhawm rau kom muaj kev sib tw ntawm cov khoom lag luam, cov tuam txhab txuas ntxiv nce lub ntim tshwj xeeb ntawm cov roj teeb lithium-ion, uas ua rau muaj kev pheej hmoo ntawm cov roj teeb ntau.
Kev ruaj ntseg Technology
Txawm hais tias cov roj teeb lithium-ion muaj ntau yam kev phom sij, nyob rau hauv cov kev mob tshwj xeeb ntawm kev siv thiab los ntawm kev siv qee yam kev ntsuas, qhov tshwm sim ntawm cov kev cuam tshuam sab nraud thiab kev kub ntxhov hauv cov hlwb tuaj yeem tswj tau zoo los xyuas kom meej tias lawv muaj kev nyab xeeb. Cov hauv qab no luv luv qhia txog ntau yam kev siv kev nyab xeeb rau cov roj teeb lithium-ion.
Xaiv cov khoom siv raw nrog kev nyab xeeb dua
Xaiv cov khoom muaj txiaj ntsig zoo thiab tsis zoo, cov khoom sib cais, thiab cov khoom siv electrolytes uas muaj kev nyab xeeb dua.
a) Xaiv cov khoom siv cathode
Kev nyab xeeb ntawm cov ntaub ntawv cathode feem ntau yog ua raws li peb yam hauv qab no:
1. Thermodynamic stability ntawm cov khoom;
2. Tshuaj stability ntawm cov ntaub ntawv;
3. Lub cev muaj zog ntawm cov khoom siv.
b) Kev xaiv cov khoom siv diaphragm
Lub luag haujlwm tseem ceeb ntawm lub tshuab cais tawm yog cais qhov zoo thiab tsis zoo electrodes ntawm lub roj teeb kom tiv thaiv qhov zoo thiab tsis zoo electrodes los ntawm kev sib cuag thiab ua rau luv luv. Nyob rau tib lub sijhawm, nws muaj peev xwm tso cai rau electrolyte ions hla dhau, uas yog, nws muaj hluav taws xob rwb thaiv tsev thiab ion conductivity. Cov ntsiab lus hauv qab no yuav tsum raug sau tseg thaum xaiv cov khoom sib cais rau cov roj teeb lithium-ion:
1. Nws muaj hluav taws xob rwb thaiv tsev thiab ua kom cov neeg kho tshuab kev sib cais ntawm qhov zoo thiab tsis zoo electrodes;
2. Nws muaj qee qhov pore loj thiab porosity kom ntseeg tau tias tsis muaj zog thiab siab ionic conductivity;
3. Cov khoom siv diaphragm muaj cov tshuaj lom neeg txaus thiab yuav tsum tiv taus electrolyte corrosion;
4. Lub diaphragm yuav tsum muaj kev ua haujlwm ntawm kev tiv thaiv tsis siv neeg kaw;
5. Lub thermal shrinkage thiab deformability ntawm lub diaphragm yuav tsum tsawg li tsawg tau;
6 Lub diaphragm yuav tsum muaj cov tuab tuab;
7 Lub diaphragm yuav tsum muaj lub cev muaj zog thiab muaj zog txaus rau kev sib tsoo.
c) Xaiv cov electrolyte
Cov electrolyte yog ib qho tseem ceeb ntawm cov roj teeb lithium-ion thiab ua lub luag haujlwm hauv kev thauj thiab ua tam sim no ntawm qhov zoo thiab tsis zoo electrodes ntawm lub roj teeb. Cov electrolyte siv nyob rau hauv lithium-ion roj teeb yog ib qho tshuaj electrolyte tsim los ntawm dissolving ib qho tsim nyog lithium ntsev nyob rau hauv ib qho organic aprotic mixed hnyav. Feem ntau nws yuav tsum ua raws li cov cai hauv qab no:
1. Muaj tshuaj lom neeg ruaj khov, tsis muaj tshuaj lom neeg nrog cov khoom siv hluav taws xob, cov khoom siv tam sim no, thiab cov khoom sib cais;
2. Zoo electrochemical stability thiab dav electrochemical qhov rais;
3 Lithium ions muaj cov conductivity siab thiab tsis tshua muaj hluav taws xob conductivity;
4. Cov kua dej dav dav;
5. Muaj kev nyab xeeb, tsis muaj tshuaj lom, thiab ib puag ncig zoo.
Txhim khu kev ruaj ntseg tag nrho ntawm cov roj teeb hlwb
Lub roj teeb tseem ceeb yog qhov txuas uas sib txuas ntau yam khoom siv hauv lub roj teeb. Nws ua ke nrog cov electrode zoo, tsis zoo electrode, separator, tab, thiab ntim zaj duab xis. Cov qauv tsim ntawm lub roj teeb tseem ceeb cuam tshuam tsis yog tsuas yog kev ua haujlwm ntawm ntau yam ntaub ntawv tab sis kuj tseem ua tau zoo tag nrho ntawm lub roj teeb. Electrochemical kev ua tau zoo thiab kev nyab xeeb kev ua haujlwm muaj qhov cuam tshuam tseem ceeb. Kev xaiv ntawm cov ntaub ntawv thiab cov qauv tsim ntawm lub roj teeb tseem ceeb yog nyob rau hauv ib nrab thiab tag nrho kev sib raug zoo. Cov yam ntxwv ntawm cov khoom siv yuav tsum tau muab tso rau hauv lub roj teeb tseem ceeb tsim los tsim cov qauv tsim nyog.
Tsis tas li ntawd, qee qhov kev tiv thaiv ntxiv kuj tseem tuaj yeem txiav txim siab hauv cov qauv roj teeb lithium. Cov txheej txheem kev tiv thaiv ib puag ncig muaj xws li cov hauv qab no:
1. Siv cov khoom hloov pauv, thaum qhov kub hauv lub roj teeb nce, nws qhov kev tiv thaiv nce raws li. Thaum qhov kub thiab txias siab dhau lawm, lub hwj huam mov yuav raug tso tseg;
2. Teem lub valve kev nyab xeeb (lub qhov hluav taws xob nyob rau sab saum toj ntawm lub roj teeb). Thaum lub roj teeb sab hauv siab nce mus rau qee tus nqi, lub valve kev nyab xeeb yuav cia li qhib kom ntseeg tau tias nws muaj kev nyab xeeb.
Cov hauv qab no yog qee qhov piv txwv ntawm kev tsim qauv kev nyab xeeb ntawm cov qauv roj teeb ntawm tes:
a) Muaj peev xwm sib piv ntawm qhov zoo thiab tsis zoo electrodes thiab tsim loj ntawm nti
Xaiv qhov tsim nyog qhov zoo thiab tsis zoo electrode peev xwm piv raws li cov yam ntxwv ntawm cov khoom zoo thiab tsis zoo electrode. Qhov sib piv ntawm lub roj teeb tseem ceeb ntawm qhov zoo thiab qhov tsis zoo electrode muaj peev xwm yog qhov txuas tseem ceeb ntsig txog kev nyab xeeb ntawm lithium-ion roj teeb. Yog hais tias qhov zoo electrode muaj peev xwm loj heev, nws yog xim hlau lithium yuav tshwm sim ntawm qhov tsis zoo electrode. deposition, thiab yog hais tias qhov tsis zoo electrode loj heev, lub roj teeb muaj peev xwm yuav raug kev txom nyem ntau dua. Feem ntau hais lus, N / P=1.05 ~ 1.15 thiab cov kev xaiv tsim nyog yog tsim los ntawm cov roj teeb muaj peev xwm thiab kev nyab xeeb. Tsim qhov loj ntawm cov khoom kom qhov chaw ntawm qhov tsis zoo electrode paste (cov khoom siv) npog (yog loj dua) txoj hauj lwm ntawm qhov zoo electrode paste. Feem ntau, qhov dav yuav tsum yog 1 txog 5 hli loj dua thiab qhov ntev yuav tsum yog 5 txog 10 hli loj dua.
b) Kev tso cai rau diaphragm dav
Lub hauv paus ntsiab lus tag nrho ntawm kev sib cais dav tsim yog los tiv thaiv kev luv luv hauv Circuit Court los ntawm kev sib cuag ncaj qha ntawm qhov zoo thiab qhov tsis zoo electrodes. Vim lub thermal shrinkage ntawm lub separator thaum lub sij hawm them thiab tso tawm cov txheej txheem ntawm lub roj teeb thiab nyob rau hauv thermal shock thiab lwm qhov chaw, lub separator yuav deform nyob rau hauv qhov ntev thiab dav cov lus qhia, thiab lub separator yuav ua rau lub wrinkled cheeb tsam yuav ua rau kom lub polarization vim qhov nce. nrug ntawm qhov zoo thiab tsis zoo electrodes; qhov stretched cheeb tsam ntawm lub separator tsub kom muaj peev xwm ntawm micro luv luv Circuit Court vim lub thinning ntawm lub separator; qhov shrinkage ntawm qhov sib cais ntug cheeb tsam yuav ua rau qhov zoo thiab tsis zoo electrodes ncaj qha Internal luv Circuit Court tshwm sim vim kev sib cuag, uas yuav ua rau lub roj teeb nyob rau hauv kev txaus ntshai vim thermal runaway. Yog li ntawd, thaum tsim lub roj teeb, lub shrinkage yam ntxwv ntawm lub separator yuav tsum tau txiav txim siab thaum siv lub cheeb tsam thiab dav. Cov khoom sib cais yog loj dua cov anode thiab cathode. Xav txog cov txheej txheem tsis raug, cov yeeb yaj kiab cais yuav tsum muaj tsawg kawg yog 0.1 hli ntev dua li ntawm ntug ntawm tus ncej.
c) Kev kho rwb thaiv tsev
Internal luv Circuit Court yog ib qho tseem ceeb ntawm kev nyab xeeb ntawm cov roj teeb lithium-ion. Nyob rau hauv cov qauv tsim ntawm lub roj teeb ntawm tes, ntau qhov chaw uas muaj kev phom sij tuaj yeem ua rau lub cev luv luv. Yog li ntawd, cov kev ntsuas tsim nyog lossis kev rwb thaiv tsev yuav tsum tau teeb tsa ntawm cov chaw tseem ceeb no txhawm rau tiv thaiv qhov tshwm sim ntawm cov hluav taws xob luv luv nyob rau hauv qhov xwm txheej txawv txav. Yog hais tias ib tug luv luv Circuit Court tshwm sim nyob rau hauv lub roj teeb, piv txwv li, kom ib tug tsim nyog nyob deb ntawm lub pob ntseg zoo thiab tsis zoo electrode; thov insulating daim kab xev rau ntawm qhov kawg ntawm ib sab yam tsis muab tshuaj txhuam rau hauv nruab nrab, thiab npog tag nrho cov khoom raug; thov insulating daim kab xev ntawm qhov zoo aluminium ntawv ci thiab cov khoom siv tsis zoo; daim ntawv thov Insulating daim kab xev npog tag nrho cov vuam qhov chaw ntawm lub tabs; insulating daim kab xev yog siv rau sab saum toj ntawm lub roj teeb core.
d) Teem lub valve kev nyab xeeb (lub twj tso kua mis siab)
Cov roj teeb lithium-ion feem ntau muaj kev phom sij vim qhov kub thiab txias sab hauv lossis siab dhau, ua rau tawg lossis hluav taws kub; teeb tsa cov cuab yeej ua kom lub siab tsim nyog tuaj yeem tso tawm lub siab thiab kub hauv lub roj teeb sai sai thaum muaj kev phom sij, txo qhov kev pheej hmoo ntawm kev tawg. Cov cuab yeej siv siab tsim nyog yuav tsum tau ua kom tau raws li lub roj teeb lub zog sab hauv thaum lub sijhawm ua haujlwm ib txwm ua thiab cia li qhib kom tso tawm lub siab thaum lub siab sab hauv mus txog qhov kev txwv txaus ntshai. Thaum teeb tsa txoj haujlwm ntawm cov cuab yeej siv lub siab, qhov cuam tshuam ntawm qhov nce hauv lub siab sab hauv ntawm lub plhaub roj teeb yuav tsum xav txog. Tsim los ntawm cov yam ntxwv ntawm deformation, kev nyab xeeb li qub tuaj yeem tsim los ntawm lamellae, npoo, seams, thiab notches.
Txhim kho qib thev naus laus zis
Kev siv zog yuav tsum tau ua kom tus qauv tsim cov txheej txheem roj teeb ntawm tes. Nyob rau hauv cov kauj ruam ntawm kev sib xyaw, txheej, ci, compacting, slitting, thiab winding, standardize (xws li diaphragm dav, electrolyte txhaj ntim, thiab lwm yam) thiab txhim kho cov txheej txheem (xws li kev txhaj tshuaj tsawg, centrifugal loading, thiab lwm yam) Plhaub txoj kev, thiab lwm yam), ua haujlwm zoo hauv kev tswj cov txheej txheem, xyuas kom cov txheej txheem zoo, thiab nqaim qhov sib txawv ntawm cov khoom; teeb tsa cov txheej txheem tshwj xeeb hauv cov kauj ruam tseem ceeb uas muaj kev cuam tshuam rau kev nyab xeeb (xws li deburring lub phaj electrode, cheb hmoov, thiab siv cov vuam sib txawv rau cov khoom sib txawv), thiab lwm yam), siv cov qauv kev soj ntsuam zoo, tshem tawm cov khoom tsis zoo, thiab tshem tawm cov khoom uas tsis zoo (xws li ncej piece deformation, diaphragm puncture, active khoom ntog tawm, electrolyte to, thiab lwm yam); khaws lub chaw tsim khoom kom huv si thiab huv si, thiab siv 5S kev tswj hwm thiab 6 -sigma kev tswj kom zoo los tiv thaiv kev sib xyaw ntawm impurities thiab noo noo thaum tsim khoom thiab txo qhov cuam tshuam ntawm kev sib tsoo ntawm kev nyab xeeb thaum tsim khoom.
