Lithium-ion roj teeb ua haujlwm li cas
Nov 28, 2023
Siv LiCoO system lithium-ion thib ob roj teeb ua piv txwv los piav qhia nws txoj hauv kev ua haujlwm. Feem ntau, cov roj teeb lithium-ion thib ob yog tsim los ntawm cov khoom siv hluav taws xob zoo, cov khoom siv hluav taws xob, cov khoom sib cais, thiab cov hluav taws xob tsis zoo. Thaum them nyiaj, cov lithium ions hauv qhov zoo electrode raug tso tawm los ntawm LiCoO txheej txheej. Lub valence ntawm cov khoom Co nce ntawm + III mus + IV. Cov khoom siv electrode zoo dhau los ua cov tshuaj tiv thaiv oxidation. Nyob rau tib lub sijhawm, lithium ions tsiv mus rau qhov tsis zoo electrode ntawm lub roj teeb los ntawm electrolyte. LiCx yog tsim los ntawm kev sib txuas nrog cov pa roj carbon hauv cov txheej txheem ntawm cov khoom siv carbon. Thaum lub roj teeb txuas nrog lub nra, cov kev cuam tshuam uas tshwm sim ntawm ob lub electrodes yog qhov rov qab ntawm cov kev tshwm sim uas tshwm sim thaum them nyiaj. Lub separator yog nyob nruab nrab ntawm qhov zoo thiab tsis zoo cov tshuaj tiv thaiv electrodes. Lub separator tuaj yeem xa cov ions tab sis tsis tso cai rau cov electrons hla. Nyob rau tib lub sijhawm, thaum muaj qee qib ntawm micro luv luv Circuit Court tshwm sim ntawm qhov zoo thiab qhov tsis zoo ntawm lub roj teeb, lub separator tseem ua lub luag haujlwm thaiv thiab tiv thaiv.
Cov roj teeb lithium-ion raug ntsuas ntawm 3.6V. Qhov hluav taws xob thaum lub roj teeb tau them tag nrho (hu ua qhov kev txiav tawm hluav taws xob) feem ntau yog 4.2V; Qhov kev txiav tawm voltage ntawm lithium-ion roj teeb yog 2.5V. Yog tias lub roj teeb lithium-ion txuas ntxiv siv tom qab qhov hluav taws xob poob mus rau 2.5V thaum siv, nws yog hu ua over-discharge, uas yuav ua rau lub roj teeb puas.
Lithium-ion roj teeb kuj kim heev. Yog tias nws cov kev them nqi thiab kev siv tsis tau raws li qhov xav tau, nws yooj yim tawg thiab txo nws txoj sia. Vim tias cov roj teeb lithium-ion muaj qhov kub thiab txias heev, overvoltage, overcurrent thiab overdischarge, tag nrho cov roj teeb muaj kev sib xyaw thermistors (saib xyuas qhov kub thiab txias) thiab tiv thaiv circuits tiv thaiv overvoltage, overcurrent thiab overdischarge.