Nyob rau hauv xyoo tas los no, cov ntawv ceeb toom ntawm hluav taws kub thiab txawm tias tawg los ntawm lithium-ion roj teeb yog ib qho tshwm sim.Lithium-ion roj teeb feem ntau yog tsim los ntawm cov khoom siv hluav taws xob tsis zoo, cov khoom siv hluav taws xob thiab cov khoom zoo electrode. Cov tshuaj lom neeg ua haujlwm ntawm cov khoom siv tsis zoo electrode graphite hauv lub xeev them yog me ntsis zoo li hlau lithium. SEI zaj duab xis nyob rau saum npoo yuav decompose ntawm qhov kub thiab txias, thiab lithium ions embedded nyob rau hauv lub graphite yuav hnov ​​​​mob nrog cov electrolyte thiab cov binder polyvinylidene fluoride thiab thaum kawg yuav tso tawm ntau cua sov.

Alkyl carbonate organic tov yog feem ntau siv los ua electrolytes, uas yog flammable. Cov khoom siv electrode feem ntau yog hloov pauv hlau oxide, uas muaj zog oxidizing zog hauv lub xeev them, thiab yooj yim decomposes tso pa tawm ntawm qhov kub thiab txias. Cov pa oxygen tso tawm reacts nrog cov electrolyte kom oxidize, thiab tom qab ntawd los tawm ntau heev.

Apperately, lub roj teeb lithium ion yuav tsis ruaj khov thaum cua sov nrog kub siab. Txawm li cas los xij, yuav muaj dab tsi tshwm sim yog tias peb ua kom sov lub roj teeb? Ntawm no peb tau ua qhov kev sim tiag tiag rau qhov them tag nrho NCM cell nrog voltage ntawm 3.7 V thiab muaj peev xwm ntawm 106 Ah.

Txoj Kev Xeem:

1. Nyob rau hauv chav tsev kub (25 ± 2 ℃), tib lub xov tooj ntawm tes yog thawj zaug tawm mus rau qhov qis qis voltage nrog rau tam sim no ntawm 1C thiab sab laug rau 15 feeb. Tom qab ntawd siv 1C tsis tu ncua tam sim no kom them rau lub siab txwv qhov hluav taws xob thiab hloov mus rau qhov hluav taws xob tas li, nres them thaum lub them tam sim no poob rau 0.05C, thiab muab tso rau 15 feeb tom qab them nyiaj;

2. Ua kom kub ntawm chav tsev kub mus rau 200 ° C ntawm 5 ° C / min, thiab khaws cia ntawm 5 ° C ib liter rau 30 feeb;

Xaus:

Lithium hlwb yuav thaum kawg ntes hluav taws thaum qhov ntsuas kub tsis tu ncua ntxiv. Los ntawm cov txheej txheem saum toj no peb xub pom lub valve qhib, cov kua ejected; Raws li qhov kub nce ntxiv, qhov thib ob ua kua ejection tshwm sim thiab pib combustion. Cov roj teeb ua tsis tau tiav ntawm ib puag ncig 138 ° C, uas twb tau siab dua li cov qauv ntsuas kub ntawm 130 ° C.