Lithium yog qhov tsawg tshaj plaws thiab feem ntau reactive hlau nyob rau hauv lub sij hawm. Vim nws qhov me me, nws muaj peev xwm ceev thiab tau txais tos los ntawm cov neeg siv khoom thiab cov engineers. Txawm li cas los xij, cov khoom siv tshuaj muaj zog heev, uas ua rau muaj kev pheej hmoo siab heev. Thaum cov hlau lithium raug rau huab cua, nws yuav ua rau muaj kev kub ntxhov oxidation nrog oxygen thiab tawg. Txhawm rau txhim kho kev nyab xeeb thiab hluav taws xob, cov kws tshawb fawb tau tsim cov khoom siv xws li graphite thiab lithium cobalt oxide los khaws cov lithium atoms. Cov qauv molecular ntawm cov ntaub ntawv no tsim cov lattices me me ntawm qib nanometer, uas tuaj yeem siv los khaws cov lithium atoms. Nyob rau hauv txoj kev no, txawm tias lub roj teeb lub plhaub tawg thiab cov pa nkag mus, cov pa oxygen molecules yuav loj dhau mus rau hauv cov chaw cia me me no, kom cov lithium atoms tsis tuaj yeem tiv nrog oxygen kom tsis txhob tawg. Lub hauv paus ntsiab lus ntawm lithium-ion roj teeb no tso cai rau tib neeg kom ua tiav lub peev xwm siab ceev thaum tseem ua tiav kev nyab xeeb.
Thaum lub roj teeb lithium-ion raug them, cov lithium atoms hauv qhov zoo electrode poob electrons thiab oxidized rau lithium ions. Lithium ions ua luam dej mus rau qhov tsis zoo electrode los ntawm electrolyte, nkag mus rau hauv qhov chaw cia ntawm qhov tsis zoo electrode, tau txais ib qho hluav taws xob, thiab raug txo rau lithium atoms. Thaum tso tawm, tag nrho cov txheej txheem yog thim rov qab. Txhawm rau tiv thaiv qhov zoo thiab tsis zoo electrodes ntawm lub roj teeb los ntawm kev sib chwv ncaj qha thiab ua rau luv luv, ib daim ntawv sib cais nrog ntau qhov pores yog ntxiv rau lub roj teeb kom tiv thaiv luv luv Circuit Court. Daim ntawv sib cais zoo kuj tseem tuaj yeem kaw qhov pores thaum lub roj teeb kub siab dhau, ua rau nws tsis tuaj yeem ua rau lithium ions hla dhau, yog li kov yeej lub hom phiaj thiab tiv thaiv kev phom sij.
Tiv thaiv
Tom qab lub lithium roj teeb ntawm tes yog overcharged mus rau ib tug voltage siab tshaj 4.2V, nws yuav pib tsim kev phiv. Qhov siab dua qhov overcharge voltage, qhov kev pheej hmoo siab dua. Tom qab lithium roj teeb cell voltage siab dua 4.2V, tus naj npawb ntawm lithium atoms nyob rau hauv cov khoom zoo electrode yog tsawg dua ib nrab. Lub sijhawm no, lub cim xeeb ntawm lub hlwb feem ntau yuav vau, ua rau lub roj teeb muaj peev xwm txo qis mus tas li. Yog tias them nyiaj txuas ntxiv, txij li qhov chaw cia ntawm qhov tsis zoo electrode tau ntim nrog lithium atoms, cov lithium hlau tom ntej yuav sib sau rau ntawm cov khoom tsis zoo electrode. Cov lithium atoms no yuav loj hlob dendrites los ntawm qhov chaw ntawm qhov tsis zoo electrode nyob rau hauv kev coj ntawm lithium ions. Cov lithium hlau crystals no yuav dhau los ntawm cov ntawv sib cais thiab luv luv rau qhov zoo thiab tsis zoo electrodes. Qee lub sij hawm lub roj teeb tawg ua ntej qhov luv luv tshwm sim. Qhov no yog vim hais tias thaum lub sij hawm overcharge txheej txheem, cov electrolyte thiab lwm yam ntaub ntawv yuav tawg thiab tsim roj, ua rau lub roj teeb lub plhaub los yog lub siab valve kom o thiab rupture, tso cai rau oxygen nkag mus rau thiab reacts nrog cov lithium atoms nyob rau saum npoo ntawm cov electrode tsis zoo. Thiab ces tawg. Yog li ntawd, thaum them cov roj teeb lithium, lub siab voltage txwv yuav tsum tau teeb tsa kom lub roj teeb lub neej, muaj peev xwm, thiab kev nyab xeeb tuaj yeem coj mus rau hauv tus account tib lub sijhawm. Qhov zoo tshaj plaws sab sauv txwv ntawm them voltage yog 4.2V.
Cov roj teeb lithium kuj yuav tsum muaj qhov txwv qis dua thaum tso tawm. Thaum lub cell voltage qis dua 2.4V, qee cov ntaub ntawv yuav pib puas. Thiab vim hais tias lub roj teeb yuav tso tawm nws tus kheej, qhov ntev nws tawm, qhov qis dua qhov voltage yuav. Yog li, nws yog qhov zoo tshaj kom tsis txhob tso tawm ntawm 2.4V. Thaum lub sij hawm thaum lub roj teeb lithium tawm ntawm 3.0V txog 2.4V, lub zog tso tawm tsuas yog kwv yees li 3% ntawm lub roj teeb muaj peev xwm. Yog li ntawd, 3.
Thaum them nyiaj thiab tso tawm, ntxiv rau qhov txwv voltage, kev txwv tam sim no kuj tseem tsim nyog. Thaum qhov tam sim no loj dhau lawm, lithium ions tsis muaj sijhawm nkag mus rau qhov chaw cia thiab yuav khaws cia rau saum npoo ntawm cov khoom. Tom qab cov lithium ions tau txais cov khoom siv hluav taws xob, lawv yuav tsim cov lithium atom crystals rau saum npoo ntawm cov khoom, uas yog qhov txaus ntshai li overcharging. Yog hais tias lub roj teeb rooj ruptures, nws yuav tawg.
Yog li ntawd, kev tiv thaiv ntawm lithium-ion roj teeb yuav tsum muaj tsawg kawg yog: kev txwv sab sauv ntawm kev them hluav taws xob, qis qis ntawm qhov hluav taws xob tawm, thiab kev txwv siab ntawm tam sim no. Feem ntau, hauv pob lithium roj teeb, ntxiv rau cov roj teeb lithium, yuav muaj cov phaj tiv thaiv. Cov phaj tiv thaiv no feem ntau muab cov kev tiv thaiv peb. Txawm li cas los xij, peb qhov kev tiv thaiv ntawm lub rooj tsav xwm tiv thaiv no pom tseeb tsis txaus, thiab qhov xwm txheej ntawm lithium roj teeb tawg tseem muaj ntau thoob ntiaj teb. Txhawm rau kom muaj kev nyab xeeb ntawm lub roj teeb system, yuav tsum ua tib zoo tshuaj xyuas ntau dua ntawm qhov ua rau lub roj teeb tawg.
Ua rau lub roj teeb tawg
1. Loj sab hauv polarization!
2. Cov ncej ncej absorbs dej thiab reacts nrog cov electrolyte.
3. Qhov zoo thiab kev ua haujlwm ntawm cov electrolyte nws tus kheej.
4. Thaum txhaj cov kua, cov kua tshuaj txhaj tsis tau raws li cov txheej txheem.
5. Thaum lub sij hawm sib dhos txheej txheem, sealing kev ua tau zoo ntawm laser welding tsis zoo, ua rau huab cua to thiab to detection.
6. Plua plav, ncej daim plua plav tuaj yeem ua rau micro luv luv ua ntej, qhov laj thawj tshwj xeeb tsis paub.
7. Cov phaj zoo thiab tsis zoo electrode yog tuab dua li cov txheej txheem ntau thiab nyuaj rau ntxig rau hauv lub plhaub.
8. Cov teeb meem ntawm cov kua dej sealing, tsis zoo sealing kev ua tau zoo ntawm cov pob steel ua rau huab cua bulging.
9. Cov khoom siv plhaub tuaj yeem muaj lub plhaub phab ntsa tuab, thiab qhov deformation ntawm lub plhaub cuam tshuam rau lub thickness.
Kev ntsuam xyuas tawg hom
Cov hom roj teeb tseem ceeb tawg tuaj yeem raug suav hais tias yog sab nraud luv luv, sab hauv luv luv thiab overcharge. Sab nraud ntawm no yog hais txog sab nraud ntawm lub roj teeb ntawm tes, suav nrog luv luv Circuit Court los ntawm kev tsim hluav taws xob tsis zoo hauv lub pob roj teeb.
Thaum lub luv luv Circuit Court tshwm sim sab nraum lub roj teeb tub ntxhais thiab cov khoom siv hluav taws xob tsis tuaj yeem txiav tawm hauv Circuit Court, cov cua kub siab yuav raug tsim rau hauv cov tub ntxhais roj teeb, ua rau ib feem ntawm cov electrolyte vaporize thiab nthuav lub plhaub roj teeb. Thaum qhov kub thiab txias ntawm lub roj teeb mus txog 135 degrees Celsius, daim ntawv sib cais zoo yuav kaw lub qhov hws, cov tshuaj tiv thaiv electrochemical yuav raug txiav lossis yuav luag tiav, qhov tam sim no yuav poob qis, thiab qhov kub kuj tseem yuav maj mam poob, yog li zam kom tsis txhob muaj teeb meem. tawg. Txawm li cas los xij, yog tias qhov pore kaw tsis zoo, lossis yog tias qhov pores tsis raug kaw tag nrho, lub roj teeb kub yuav nce ntxiv, electrolyte ntau yuav vaporize, thiab thaum kawg lub plhaub roj teeb yuav tawg, thiab lub roj teeb kub tseem yuav nce ntxiv mus. qhov chaw uas nws siv. Cov khoom kub hnyiab thiab tawg.
Internal luv Circuit Court feem ntau yog tshwm sim los ntawm burrs ntawm tooj liab ntawv nyiaj thiab txhuas ntawv ci nkag mus rau hauv lub diaphragm, los yog lub dendrites ntawm lithium atoms nkag mus rau hauv lub diaphragm. Cov hlau me me zoo li no tuaj yeem ua rau lub voj voog luv luv. Txij li thaum rab koob nyias nyias thiab muaj qee qhov kev tiv thaiv tus nqi, qhov tam sim no yuav tsis loj heev. Copper thiab aluminium foil burrs yog tshwm sim thaum lub sij hawm tsim khoom. Qhov tshwm sim pom tau yog tias lub roj teeb xau sai heev, thiab feem ntau ntawm lawv tuaj yeem raug tshuaj xyuas los ntawm lub Hoobkas roj teeb lossis lub Hoobkas sib dhos. Ntxiv mus, vim hais tias cov burrs me me, lawv qee zaum hlawv tawm, ua rau lub roj teeb rov qab mus rau qhov qub. Yog li ntawd, qhov tshwm sim ntawm kev tawg tshwm sim los ntawm burr micro-short circuit tsis siab.
Cov nqe lus no tuaj yeem txhawb nqa los ntawm kev txheeb cais los ntawm qhov tseeb tias feem ntau cov roj teeb tsis zoo uas tsis tshua muaj hluav taws xob sai tom qab them nyiaj hauv ntau lub tuam txhab roj teeb, tab sis kev tawg tsis tshua muaj tshwm sim. Yog li ntawd, kev tawg tshwm sim los ntawm kev luv luv Circuit Court yog feem ntau tshwm sim los ntawm overcharging. Vim tias tom qab them nyiaj ntau dhau, koob zoo li cov hlau lithium muaj nyob txhua qhov chaw ntawm tus ncej, cov ntsiab lus puncture nyob txhua qhov chaw, thiab micro short circuits tshwm sim txhua qhov chaw. Yog li ntawd, lub roj teeb kub yuav maj mam nce, thiab thaum kawg qhov kub siab yuav gas lub electrolyte. Nyob rau hauv rooj plaub no, txawm tias qhov kub thiab txias heev thiab cov khoom kub hnyiab thiab tawg, lossis lub plhaub tawg ua ntej, tso cai rau huab cua nkag mus thiab ua rau oxidize cov lithium hlau, nws yuav xaus rau qhov tawg.
Txawm li cas los xij, qhov tawg tshwm sim los ntawm ib qho luv luv Circuit Court tshwm sim los ntawm overcharging tsis tas yuav tshwm sim thaum lub sijhawm them nyiaj. Nws yog qhov ua tau tias thaum qhov kub ntawm lub roj teeb tsis siab txaus rau cov khoom siv los hlawv thiab cov roj tsim tawm tsis txaus los tawg lub plhaub roj teeb, cov neeg siv khoom nres them thiab nqa lawv lub xov tooj ntawm tes. Nyob rau lub sijhawm no, cov cua sov uas tsim los ntawm ntau lub micro-short circuits maj mam nce qhov kub ntawm lub roj teeb. Tom qab ib ntus, lub roj teeb tawg. Ib qho lus piav qhia los ntawm cov neeg siv khoom yog tias lawv pom lub xov tooj kub heev thaum lawv khaws nws, thiab tom qab ntawd tawg tom qab muab pov tseg.
Raws li cov hom kev tawg saum toj no, peb tuaj yeem tsom mus rau kev tiv thaiv kev tawg hauv peb yam: tiv thaiv overcharging, tiv thaiv sab nraud luv luv Circuit Court, thiab txhim kho cov roj teeb cell kev nyab xeeb. Ntawm lawv, kev tiv thaiv overcharge thiab kev tiv thaiv kev tiv thaiv luv luv sab nraud yog kev tiv thaiv hluav taws xob, uas muaj feem cuam tshuam nrog lub roj teeb tsim thiab kev sib dhos roj teeb. Lub hom phiaj ntawm kev txhim kho cov roj teeb ntawm tes kev nyab xeeb yog tshuaj lom neeg thiab kev tiv thaiv, uas muaj kev sib raug zoo nrog cov tuam txhab roj teeb.
tsim specifications
Txij li thaum muaj ntau pua lab lub xov tooj ntawm tes hauv ntiaj teb, kom ua tiav kev nyab xeeb, qhov tsis ua tiav ntawm kev tiv thaiv kev ruaj ntseg yuav tsum tsawg dua ib ntawm 100 lab. Vim tias qhov tsis ua hauj lwm ntawm Circuit Board yog feem ntau siab dua ib ntawm 100 lab. Yog li ntawd, thaum tsim lub roj teeb system, yuav tsum muaj ntau tshaj li ob kab ntawm kev tiv thaiv kev nyab xeeb. Ib qho kev tsim qauv yuam kev yog siv lub adapter kom them cov roj teeb ncaj qha. Nyob rau hauv txoj kev no, txoj haujlwm tseem ceeb ntawm kev tiv thaiv overcharge yog muab tag nrho rau lub phaj tiv thaiv ntawm lub roj teeb pob. Txawm hais tias qhov kev ua tsis tiav ntawm pawg thawj coj saib kev tiv thaiv tsis yog siab, txawm tias qhov ua tsis tiav yog tsawg li ib ntawm ib lab, kev sib tsoo tawg tseem yuav tshwm sim txhua hnub thoob ntiaj teb.
Yog tias lub roj teeb hluav taws xob tuaj yeem muab ob theem kev tiv thaiv kev nyab xeeb rau overcharge, tshaj tawm, thiab dhau tam sim no, yog tias qhov tsis ua tiav ntawm txhua qib kev tiv thaiv yog ib qho ntawm 10,000, ob theem kev tiv thaiv tuaj yeem txo. tus nqi tsis ua haujlwm rau ib ntawm 100,000,000. Ib lub roj teeb uas siv ntau lub kaw lus thaiv daim duab yog raws li hauv qab no, suav nrog lub charger thiab lub roj teeb pob. Lub charger muaj ob ntu: adapter thiab charger. Lub adapter hloov AC lub zog rau DC lub zog, thiab tus nqi tswj hwm txwv qhov siab tshaj plaws tam sim no thiab qhov hluav taws xob ntawm DC lub zog. Lub roj teeb pob muaj ob ntu: lub phaj tiv thaiv thiab lub roj teeb ntawm tes, nrog rau PTC kom txwv qhov siab tshaj plaws tam sim no.
Siv lub xov tooj ntawm tes roj teeb system ua piv txwv. Cov kev tiv thaiv overcharge siv lub charger tso zis voltage los ntawm ib ncig ntawm 4.2V kom ua tiav thawj theem ntawm kev tiv thaiv. Nyob rau hauv txoj kev no, txawm tias lub phaj tiv thaiv ntawm lub pob roj teeb ua tsis tiav, lub roj teeb yuav tsis raug overcharged. Kev phom sij tshwm sim. Qhov thib ob theem ntawm kev tiv thaiv yog kev tiv thaiv overcharge muaj nuj nqi ntawm lub rooj tiv thaiv kev tiv thaiv, uas feem ntau yog teem rau 4.3V. Nyob rau hauv txoj kev no, pawg thawj coj saib kev tiv thaiv feem ntau tsis tas yuav tsum tau ua lub luag haujlwm rau kev txiav tawm cov nqi them tam sim no. Nws tsuas yog yuav tsum tau ua thaum lub charger voltage siab txawv txav. Kev tiv thaiv overcurrent yog muab los ntawm cov phaj tiv thaiv thiab tam sim no limiting phaj. Cov no kuj yog ob txheej tiv thaiv tiv thaiv overcurrent thiab sab nraud luv luv Circuit Court. Vim tias kev tso tawm ntau dhau tsuas yog tshwm sim thaum cov khoom siv hluav taws xob tau siv. Yog li ntawd, kev tsim qauv dav dav yog rau lub rooj tsav xwm hauv Circuit Court ntawm cov khoom siv hluav taws xob los muab thawj theem ntawm kev tiv thaiv, thiab lub rooj tiv thaiv kev tiv thaiv ntawm lub roj teeb pob los muab kev tiv thaiv qib thib ob. Thaum cov khoom siv hluav taws xob pom tias qhov hluav taws xob hluav taws xob qis dua 3.0V, lawv yuav tsum tau kaw. Yog tias cov khoom tsis tsim nrog cov haujlwm no, lub rooj tsav xwm kev tiv thaiv yuav kaw qhov hluav taws xob tawm thaum qhov hluav taws xob tsawg li 2.4V.
Nyob rau hauv luv luv, thaum tsim ib lub roj teeb system, ob theem ntawm kev tiv thaiv hluav taws xob yuav tsum tau muab rau overcharge, over-discharge, thiab over-current. Lub rooj tiv thaiv kev tiv thaiv yog kab thib ob ntawm kev tiv thaiv. Tshem lub phaj tiv thaiv ua ntej them nyiaj. Yog tias lub roj teeb tawg, nws txhais tau tias tsim tsis zoo.
Txawm hais tias cov txheej txheem saum toj no muab ob txheej kev tiv thaiv, cov neeg siv khoom feem ntau yuav cov khoom siv hluav taws xob tsis yog thawj zaug rau kev them nyiaj tom qab lub charger so, thiab cov chaw tsim khoom charger, raws li kev txiav txim siab nqi, feem ntau tshem tawm tus nqi tswj kom txo cov nqi. . Raws li qhov tshwm sim, cov nyiaj tsis zoo ua rau cov nyiaj zoo, thiab ntau lub chargers uas tsis zoo tshwm sim hauv khw. Qhov no ua rau kev tiv thaiv overcharge poob thawj thiab tseem ceeb tshaj plaws ntawm kev tiv thaiv. Overcharging yog qhov tseem ceeb tshaj plaws uas ua rau lub roj teeb tawg. Yog li ntawd, inferior chargers tuaj yeem suav tias yog qhov ua txhaum ntawm cov roj teeb tawg.
Tau kawg, tsis yog txhua lub tshuab roj teeb siv cov kev daws teeb meem saum toj no. Qee qhov xwm txheej, lub pob roj teeb kuj tseem yuav muaj tus tswj hwm tus nqi tsim. Piv txwv li: Ntau lub khoos phis tawj phau ntawv muaj cov tswj hwm rau lawv cov roj teeb sab nraud. Qhov no yog vim lub khoos phis tawj phau ntawv feem ntau muaj tus nqi tswj hwm hauv lub khoos phis tawj thiab tsuas yog muab cov neeg siv khoom nrog lub adapter. Yog li ntawd, cov roj teeb sab nraud ntawm lub khoos phis tawj phau ntawv yuav tsum muaj tus tswj hwm kom muaj kev nyab xeeb ntawm cov roj teeb sab nraud thaum them nyiaj siv lub adapter. Tsis tas li ntawd, cov khoom uas raug them siv lub tsheb luam yeeb sib zog qee zaum muaj cov khoom siv hluav taws xob ua rau hauv pob roj teeb.
kab kawg ntawm kev tiv thaiv
Yog tias kev tiv thaiv hluav taws xob ua tsis tiav, kab kawg ntawm kev tiv thaiv yuav muab los ntawm lub roj teeb tseem ceeb. Qhov kev nyab xeeb ntawm cov tub ntxhais roj teeb tuaj yeem sib txawv raws li seb lub roj teeb tseem tuaj yeem dhau los ntawm sab nraud luv luv thiab overcharge. Vim hais tias, ua ntej lub roj teeb tawg, yog tias muaj lithium atoms nyob rau saum npoo ntawm cov khoom hauv, qhov tawg yuav muaj zog dua. Tsis tas li ntawd, kev tiv thaiv overcharge feem ntau tshuav nrog tsuas yog ib kab ntawm kev tiv thaiv vim tias cov neeg siv khoom siv cov chargers qis dua. Yog li ntawd, lub peev xwm ntawm lub roj teeb ntawm tes los tiv thaiv overcharge yog qhov tseem ceeb tshaj nws lub peev xwm los tiv thaiv cov kab hluav taws xob sab nraud.
Kev sib piv ntawm kev nyab xeeb ntawm txhuas-cased roj teeb thiab steel-cased batteries Aluminium plhaub muaj kev ruaj ntseg zoo tshaj cov hlau plhaub.