Kev them nyiaj ntau dhau lithium-ion roj teeb lub hlwb kom siab dua 4.2V yuav pib tsim cov kev mob tshwm sim. Qhov siab dua qhov overcharge voltage, qhov txaus ntshai ntau dua. Thaum qhov hluav taws xob ntau tshaj 4.2V, tsawg dua ib nrab ntawm cov lithium atoms nyob hauv cov khoom siv electrode zoo. Nyob rau lub sijhawm no, cov cell khaws cia feem ntau vau, ua rau muaj peev xwm mus tas li. Yog tias them nyiaj txuas ntxiv, txij li cov tsis zoo electrode cia cov hlwb twb muaj tag nrho ntawm lithium atoms, cov lithium hlau tom ntej yuav sib sau rau ntawm cov khoom tsis zoo electrode. Cov lithium atoms no yuav loj hlob mus rau hauv dendritic muaju los ntawm qhov tsis zoo electrode nto nyob rau hauv cov kev taw qhia los ntawm cov lithium ions originated. Cov lithium hlau muaju tuaj yeem nkag mus rau qhov sib cais, ua rau luv luv ntawm qhov zoo thiab qhov tsis zoo electrodes. Qee lub sij hawm lub roj teeb tawg ua ntej qhov luv luv tshwm sim vim thaum lub sij hawm overcharging, cov electrolyte thiab lwm yam ntaub ntawv decompose, tsim cov roj uas ua rau lub roj teeb casing los yog siab valve rau bulge thiab rupture, tso cai rau cov pa oxygen nkag mus rau thiab ua rau cov lithium atoms nyob rau hauv qhov chaw tsis zoo electrode, ua rau tawg.
Yog li ntawd, thaum them cov roj teeb lithium -ion roj teeb, nws yog ib qho tseem ceeb uas yuav tsum tau teeb tsa lub siab voltage txwv kom sib npaug roj teeb lub neej, muaj peev xwm, thiab kev nyab xeeb. Qhov zoo tshaj plaws them voltage txwv yog 4.2V. Cov roj teeb lithium-ion roj teeb kuj tseem muaj qhov txwv qis dua thaum tso tawm. Thaum lub cell voltage poob qis dua 2.4V, qee cov ntaub ntawv pib deteriorate. Tsis tas li ntawd, vim tias cov roj teeb tus kheej - tso tawm, qhov hluav taws xob txo qis dua qhov lawv tso tawm ntev dua; Yog li ntawd, nws yog qhov zoo tshaj kom tsis txhob tso tawm rau 2.4V ua ntej nres. Thaum lub sijhawm tso tawm los ntawm 3.0V txog 2.4V, lub zog tso tawm los ntawm lithium{13}}ion roj teeb tsuas yog kwv yees li 3% ntawm nws lub peev xwm. Yog li ntawd, 3.0V yog ib qho zoo tagnrho tso tawm voltage. Dhau li ntawm qhov txwv tsis pub muaj hluav taws xob, cov kev txwv tam sim no kuj tseem tsim nyog thaum them thiab tawm. Yog tias qhov tam sim no siab dhau lawm, lithium ions yuav tsis muaj sijhawm txaus los nkag mus rau hauv lub cell cia thiab yuav khaws cia rau ntawm cov khoom siv.
