Cov Ntsiab Cai Ua Haujlwm ntawm Lithium roj teeb: Cov txheej txheem them nqi, txheej txheem tshem tawm, thiab roj teeb npog phaj

Nyob rau hauv lub tshav pob ntawm niaj hnub lub zog cia, lithium roj teeb, raws li ib tug high efficiency theem nrab roj teeb, tau lug siv nyob rau hauv cov khoom siv hluav taws xob, hluav taws xob tsheb, hnub ci zog cia systems thiab lwm yam teb. Lub hauv paus ntsiab lus ua haujlwm ntawm lithium roj teeb yog ua raws li kev tsiv teb tsaws ntawm lithium ions ntawm qhov zoo thiab tsis zoo electrodes los khaws thiab tso tawm. Kab lus no yuav txheeb xyuas cov qauv hauv paus, kev them nqi thiab kev tso tawm thiab cov txheej txheem tseem ceeb ntawm cov roj teeb lithium. Prismatic Lithium Battery Annexe yog ib feem tseem ceeb ntawm prismatic lithium roj teeb, thiab nws cov qauv tsim thiab kev tsim khoom zoo yog ncaj qha ntsig txog kev sib khi thiab kev nyab xeeb ntawm lub roj teeb.

Cov roj teeb lithium muaj plaub yam tseem ceeb: qhov zoo electrode (cathode), qhov tsis zoo electrode (anode), electrolyte, thiab cov separator. Lub cathode feem ntau siv lithium-muaj cov khoom siv oxide- xws li lithium cobalt oxide, lithium manganese oxide, los yog lithium hlau phosphate- muaj peev xwm ntawm kev hloov pauv hloov pauv thiab de- intercalation ntawm lithium ions. Lub anode feem ntau siv cov pa roj carbon-raws li cov ntaub ntawv (xws li graphite) lossis lithium hlau, uas tuaj yeem nqus tau thiab tso tawm lithium ions. Cov electrolyte ua hauj lwm raws li ib tug ion-conductive nruab nrab- kua los yog khoom- yooj yim ionic conduction thaum hluav taws xob cais cov cathode thiab anode los tiv thaiv electron ntws ntawm lawv. Lub separator yog cov khoom ntxeem tau insulating nyob nruab nrab ntawm cov electrodes; Nws tiv thaiv kev sib cuag ncaj qha (thiab yog li luv luv Circuit Court) thaum tso cai rau lithium ions tsiv teb tsaws los ntawm nws qhov pores.

Tsis pub dhau lub roj teeb ntim cov qauv, lub hau saum toj kawg nkaus rau lub roj teeb prismatic ntawm tes ua haujlwm ntau yam, suav nrog kev sib khi, rwb thaiv tsev, thiab lub siab nyem. Lub hau yog laser-welded rau lub roj teeb casing los tsim lub hermetic foob, tiv thaiv electrolyte to thiab thaiv cov ingress ntawm sab nraud ya raws thiab oxygen. Feem ntau kev koom ua ke cov yam ntxwv tseem ceeb xws li lub davhlau ya nyob twg zoo, electrolyte filling chaw nres nkoj, thiab kev nyab xeeb siab nyem valve, lub hau saum toj kawg nkaus yog ib qho tseem ceeb rau kev ua kom lub roj teeb muaj kev ruaj ntseg thiab kev nyab xeeb.

Thaum lub sij hawm them nyiaj, cov tshuaj tiv thaiv electrochemical tshwm sim ntawm qhov zoo thiab tsis zoo electrodes ntawm lithium roj teeb. Thaum siv cov hluav taws xob sab nraud, lithium ions (Li⁺) tau muab rho tawm los ntawm cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob zoo, tso cov hluav taws xob tawm. Cov lithium ions migrate los ntawm cov electrolyte thiab cais mus rau qhov tsis zoo electrode, thaum electrons ntws los ntawm qhov zoo mus rau qhov tsis zoo electrode ntawm sab nraud Circuit Court, tsim ib tug them tam sim no. Ntawm qhov tsis zoo electrode, lithium ions intercalate rau hauv cov txheej txheem ntawm cov khoom siv carbon, ua ke nrog electrons, thiab khaws cia rau hauv cov khoom hauv lub xeev atomic. Cov txheej txheem no txuas ntxiv mus txog thaum tag nrho cov lithium ions extractable tau tsiv los ntawm qhov zoo mus rau qhov tsis zoo electrode los yog lub roj teeb mus txog nws qhov kev txiav tawm voltage.

Raws li kev them nyiaj pib, qhov sib txawv ntawm cov roj teeb tau nce, thiab cov khoom siv hluav taws xob khaws cia nce ntxiv. Txhawm rau kom muaj kev nyab xeeb, cov roj teeb lithium siv cov kev tswj xyuas hluav taws xob tshwj xeeb los tswj cov tam sim no thiab qhov hluav taws xob, tiv thaiv cov teeb meem xws li kev sib tsoo ntawm qhov zoo electrode, electrolyte decomposition, los yog lithium hlau plating los ntawm overcharging. Thaum cov roj teeb lub hlwb tau sib sau ua ke rau hauv ib pob, lub thawv roj teeb aluminium npog muab cov qauv kev tiv thaiv thiab kev tswj xyuas thermal, kom ntseeg tau tias cov qauv kev ua haujlwm ruaj khov thiab muaj txiaj ntsig zoo thaum lub sijhawm them nyiaj.

Thaum lub roj teeb lithium tso tawm, cov tshuaj tiv thaiv pib nyob rau hauv qhov kev taw qhia rov qab. Lithium ions khaws cia rau hauv qhov tsis zoo electrode de-intercalate los ntawm cov pa roj carbon txheej txheej thiab tsiv rov qab mus rau qhov zoo electrode los ntawm electrolyte thiab cais. Ib txhij, electrons ntws los ntawm qhov tsis zoo mus rau qhov zoo electrode ntawm sab nraud Circuit Court, muab hluav taws xob hluav taws xob rau sab nraud load. Ntawm qhov zoo electrode, lithium ions re-intercalate rau hauv cov khoom siv lead ua lattice ntawm cov khoom siv hluav taws xob thiab ua ke nrog cov khoom siv hluav taws xob los tsim cov lithium compounds ruaj khov. Cov txheej txheem no txuas ntxiv mus txog thaum qhov sib txawv ntawm cov electrodes poob mus rau qhov tso tawm hluav taws xob lossis cov lithium ion concentration hauv lub roj teeb mus txog qhov sib npaug.

Kev rov ua dua tshiab ntawm lithium ions ntawm qhov zoo thiab qhov tsis zoo electrodes thaum lub sij hawm them nqi - lub voj voog tawm yog hu ua "rocking- lub rooj zaum", uas yog vim li cas lithium roj teeb feem ntau hu ua "rocking- lub rooj zaum roj teeb." Cov txheej txheem kev khiav hauj lwm no yuav tsum muaj cov khoom siv hluav taws xob kom muaj kev ruaj ntseg zoo heev thiab ionic conductivity kom muaj peev xwm tuav tau ntau pua rau ntau txhiab lub voj voog. Hauv kev ntim roj teeb, lithium-ion roj teeb npog daim hlau siv siab- cov khoom siv stamping thiab rwb thaiv tsev kom ntseeg tau tias cov hluav taws xob sib cais thiab sib khi ntawm qhov zoo thiab qhov tsis zoo ntawm cov terminals thiab lub roj teeb casing, yog li tiv thaiv cov luv luv Circuit Court thiab sab nraud to.