Lithium-ion roj teebtawg ua rau:
1. Loj sab hauv polarization;
2. Cov ncej ncej absorbs dej thiab reacts nrog electrolyte gas nruas;
3. Qhov zoo thiab kev ua haujlwm ntawm cov electrolyte nws tus kheej;
4. Tus nqi ntawm cov tshuaj txhaj tshuaj tsis ua raws li cov txheej txheem;
5. Tsis zoo sealing kev ua tau zoo ntawm laser vuam nyob rau hauv cov txheej txheem sib dhos thiab cov pa tawm thaum ntsuas huab cua to;
6. Plua plav, ncej daim plua plav yog yooj yim ua rau micro-short circuit hauv thawj qhov chaw;
7. Qhov zoo thiab qhov tsis zoo ntawm cov ncej yog tuab dua li cov txheej txheem ntau, thiab nws nyuaj rau nkag mus rau hauv lub plhaub;
8. Cov teeb meem kev txhaj tshuaj sealing, steel pob sealing kev ua haujlwm tsis zoo ua rau lub nruas roj;
9. Plhaub tuaj lub plhaub phab ntsa thickness, plhaub deformation cuam tshuam lub thickness;
10. Sab nraum qhov kub ambient kub kuj yog ib qho tseem ceeb ntawm kev tawg.
Kev tiv thaiv los ntawm lub roj teeb:
Lithium-ion roj teebcov hlwb tau dhau mus rau qhov hluav taws xob siab dua 4.2V thiab yuav pib tshwm sim. Qhov siab dua qhov overcharge voltage, siab dua qhov txaus ntshai. Thaum qhov hluav taws xob ntawm lithium cell siab dua 4.2V, tsawg dua li ib nrab ntawm cov lithium atoms tseem nyob hauv cov khoom siv electrode zoo, thiab qhov chaw cia khoom feem ntau poob qis, ua rau lub roj teeb muaj peev xwm poob mus tas li. Yog tias them nyiaj txuas ntxiv, raws li qhov chaw cia ntawm qhov tsis zoo electrode twb tag nrho ntawm lithium atoms, cov lithium hlau tom ntej yuav sib sau rau ntawm cov khoom tsis zoo electrode. Cov lithium atoms yuav loj hlob dendritic crystals los ntawm anode nto nyob rau hauv cov kev taw qhia ntawm lithium ions. Cov lithium hlau crystals no yuav dhau los ntawm daim ntawv diaphragm thiab luv luv rau qhov zoo thiab tsis zoo electrodes. Qee lub sij hawm lub roj teeb tawg ua ntej lub luv luv Circuit Court tshwm sim, qhov no yog vim nyob rau hauv cov txheej txheem overcharging, cov electrolyte thiab lwm yam ntaub ntawv yuav tawg kom tshwm sim roj, ua rau lub roj teeb lub plhaub los yog lub siab valve bulge rupture, thiaj li hais tias cov pa oxygen mus rau hauv cov tshuaj tiv thaiv nrog rau tsub zuj zuj. ntawm lithium atoms ntawm qhov chaw ntawm qhov tsis zoo electrode, thiab tom qab ntawd tawg.
Yog li ntawd, thaum them nyiajlithium-ion roj teeb, lub siab voltage txwv yuav tsum tau teem nyob rau hauv thiaj li yuav coj mus rau hauv tus account lub neej, muaj peev xwm, thiab kev ruaj ntseg ntawm lub roj teeb nyob rau tib lub sij hawm. Qhov zoo tshaj plaws sab sauv txwv ntawm kev them hluav taws xob yog 4.2 V. Tseem yuav tsum muaj qhov txwv qis dua thaum tso cov lithium cell. Thaum lub cell voltage poob qis dua 2.4V, qee cov ntaub ntawv yuav pib puas. Thiab vim hais tias lub roj teeb yuav tso tawm tus kheej, ntev npaum li cas koj tso qhov qis dua qhov voltage, yog li ntawd, nws yog qhov zoo tshaj kom tsis txhob tso tawm rau 2.4V ua ntej nres. Lub zog tso tawm thaum lub sijhawm ntawm 3.0V txog 2.4V tsuas yog suav txog li 3% ntawm lub peev xwm ntawm lithium-ion roj teeb. Yog li, 3.0V yog qhov zoo tshaj plaws txiav tawm hluav taws xob rau kev tawm. Thaum them nyiaj thiab tso tawm, ntxiv rau qhov txwv voltage, kev txwv tam sim no kuj tseem tsim nyog. Thaum cov tam sim no siab dhau lawm, cov lithium ions tsis muaj sijhawm nkag mus rau hauv qhov chaw cia khoom thiab yuav sau rau ntawm qhov chaw ntawm cov khoom.
Cov nolithium ionsnce electrons thiab crystallize lithium atoms nyob rau saum npoo ntawm cov khoom, uas yog tib yam li overcharging thiab yuav ua tau txaus ntshai. Nyob rau hauv cov ntaub ntawv ntawm ib tug rupture ntawm lub roj teeb rooj plaub, nws yuav tawg. Yog li ntawd, kev tiv thaiv ntawm lithium-ion roj teeb yuav tsum muaj tsawg kawg yog peb yam khoom: lub siab txwv ntawm kev them nqi hluav taws xob, qis qis ntawm qhov hluav taws xob tawm hluav taws xob, thiab qhov txwv siab tshaj ntawm tam sim no. Cov roj teeb lithium-ion dav dav, ntxiv rau cov roj teeb lithium-ion, yuav muaj cov phaj tiv thaiv, cov phaj tiv thaiv no tseem ceeb heev los muab cov kev tiv thaiv peb.
Post lub sij hawm: Dec-07-2023