Tsim thiab tsim cov lithium{0}}ion roj teeb

Tsim lub hauv paus ntawm lithium{0}}ion roj teeb

Basic Design Principles

Lub roj teeb tsim yuav tsum ua raws li cov kev xav tau tshwj xeeb ntawm cov khoom siv hluav taws xob thiab cov yam ntxwv ntawm covroj teebnws tus kheej. Ua ntej, cov txheej txheem kev tsis sib xws ntawm txhua yam, suav nrog electrodes, electrolyte, cais, thiab casing, yuav tsum tau txhais kom meej. Tsis tas li ntawd, cov txheej txheem kev tsim khoom yuav tsum tau kho kom zoo kom ntseeg tau tias cov roj teeb zaum kawg ua tau raws li cov kev qhia ua ntej thiab cov ntsuas kev ua tau zoo (xws li voltage, peev, thiab ntim). Tsim nyog thiab siv tau zoo yog qhov tseem ceeb rau kev txhim kho lub roj teeb kev ua tau zoo hauv kev siv tiag tiag; yog li ntawd, nrhiav kev daws teeb meem thoob plaws hauv tus txheej txheem tsim yog qhov tseem ceeb tshwj xeeb.

Kev tsim qauv tsim

Hauv kev tsim roj teeb, nws yog ib qho tseem ceeb kom nkag siab txog cov kev cai tshwj xeeb ntawm lub hom phiaj ntaus ntawv rau cov roj teeb kev ua tau zoo thiab nws qhov chaw ua haujlwm. Feem ntau, cov hauv qab no tseem ceeb yuav tsum tau xav txog:

Lithium-Ion roj teeb tau siv dav vim lawv qhov ua tau zoo heev. Txawm li cas los xij, hauv qee daim ntawv thov, lawv yuav tsum ua kom tau raws li ntau qhov kev xav tau ntxiv, xws li tiv thaiv kev poob siab thiab kev vibrations, hloov mus rau qhov kub thiab txias, thiab ua haujlwm nyob rau hauv qis - qhov chaw siab. Thaum tsim cov roj teeb no, ntxiv rau kev xav txog cov yam ntxwv tseem ceeb ntawm lub cev, nws yuav tsum ua tib zoo xav txog yam xws li kev xaiv cov khoom siv raw, yam tseem ceeb uas txiav txim siab cov yam ntxwv ntawm roj teeb, kev ua tau zoo tag nrho, cov txheej txheem tsim khoom, tus nqi- kev tsom xam cov txiaj ntsig, thiab kev ua haujlwm kub.

Cov cim tseem ceeb rau kev ntsuas kev ua haujlwm ntawm cov roj teeb fais fab

1) Muaj peev xwm

Lub peev xwm roj teeb yog hais txog tag nrho cov hluav taws xob uas lub roj teeb tuaj yeem muab tau raws li cov xwm txheej tshwj xeeb. Lub tswv yim no feem ntau yog qhia raws li cov khoom tam sim no thiab lub sijhawm, thiab feem ntau ntsuas hauv ampere - teev (Ah). Qhov kev ntsuas no ncaj qha cuam tshuam rau lub roj teeb lub siab tshaj plaws ua haujlwm tam sim no thiab lub sijhawm ua haujlwm tas mus li.

2) Tshem tawm cov yam ntxwv thiab Internal Resistance

Lub roj teeb cov yam ntxwv tso tawm cuam tshuam txog kev ruaj ntseg ntawm nws cov zis hluav taws xob, qhov hluav taws xob toj siab, thiab nws qhov siab tshaj -tam sim no tawm kev ua haujlwm nyob rau hauv cov xwm txheej tshwj xeeb. Cov no yog cov cim tseem ceeb rau kev ntsuas lub roj teeb lub peev xwm. Tsis tas li ntawd, muaj ob hom kev tiv thaiv hauv lub roj teeb: ohmic internal resistance thiab polarization internal resistance. Ob hom kev tiv thaiv sab hauv no muaj kev cuam tshuam tshwj xeeb rau kev ua haujlwm tawm tag nrho thaum lub sij hawm siab - tawm tam sim no.

3) Kev khiav hauj lwm qhov kub thiab txias

Txhawm rau kom muaj kev ruaj ntseg ntawm cov khoom siv hluav taws xob nyob rau hauv ntau yam kev mob ib puag ncig, cov roj teeb yuav tsum muaj kev ua tau zoo nyob rau hauv qhov kub thiab txias.

4) Kev ua haujlwm ruaj khov
Tom qab qee lub sijhawm ntawm kev cia, roj teeb kev ua tau zoo yuav hloov pauv vim muaj ntau yam, ua rau tus kheej - tso tawm, electrolyte to, luv Circuit Court, thiab lwm yam, yog li cuam tshuam rau nws cov kev ua tau zoo.

5) Cycle Performance
Lub voj voog kev ua tau zoo yog hais txog tus lej ntawm tus nqi - tso tawm mus rau lub roj teeb thib ob tuaj yeem tiv taus raws li cov nqi tshwj xeeb- cov cai tawm mus txog thaum nws qhov kev ua tau zoo poob mus rau qib uas tau txiav txim siab. Nws yog ib qho ntawm cov cim tseem ceeb rau kev ntsuas qhov ntev - lub sij hawm cia siab ntawm lub roj teeb.

6) Cov yam ntxwv ntawm kev nyab xeeb
Roj teeb kev nyab xeeb yog feem ntau cuam tshuam rau nws qib kev nyab xeeb raws li kev siv tsis zoo. Cov kev siv txawv txav no muaj xws li overcharging, luv luv Circuit Court, kev ntsuam xyuas ntsia thawv nkag, kev ntsuam xyuas tsoo, kub lub thawv raug, cov khoom hnyav cuam tshuam, thiab kev vibrations. Lub roj teeb muaj peev xwm tiv taus cov xwm txheej hnyav no yog ib qho tseem ceeb hauv kev txiav txim siab nws qhov tsim nyog rau daim ntawv thov loj -.

Cov khoom siv rau kev npaj thiab ua tus cwj pwm ntawm cov khoom zoo thiab tsis zoo electrode

kev npaj

kev npaj

Cov khoom siv hluav taws xob zoo thiab tsis zoo yog cov khoom tseem ceeb ntawm lithium{0}} ion roj teeb, xws li cov electrodes zoo xws li LFePO4 lossis LiCoO2, thiab cov electrodes tsis zoo xws li graphite lossis silicon / carbon. Cov ntaub ntawv sib txawv xav tau kev npaj sib txawv. Tshooj lus no siv cov ntaub ntawv ternary zoo electrode ua piv txwv los qhia cov khoom siv uas xav tau hauv kev npaj.

Cim xeeb

Cov ntaub ntawv tseem ceeb ntawm lithium- ion roj teeb, xws li cov khoom zoo thiab tsis zoo electrode, yog tag nrho cov khoom siv hluav taws xob ua haujlwm uas cuam tshuam rau kev ua haujlwm ntawm electrochemical ntawm lithium - ion roj teeb. Muaj ntau qhov kev qhia txog kev xav txog thaum lub sij hawm tsim khoom thiab kev loj hlob, nrog rau cov roj teeb tsim thiab daim ntawv thov, tab sis lawv feem ntau poob rau hauv peb pawg: thawj qeb yog cov khoom siv lead ua qauv thiab microstructure; qeb thib ob yog cov khoom siv physicochemical ntsuas, suav nrog particle loj faib, thaj chaw tshwj xeeb, kais ntom ntom, thiab cov khoom muaj pes tsawg leeg (xws li impurities); thiab qeb thib peb yog cov khoom siv electrochemical kev ua tau zoo, xws li lub peev xwm, kev ua haujlwm pib, thiab electrochemical impedance. Kev tshawb nrhiav thiab kev ua tus cwj pwm ntawm ntau qhov ntsuas ntawm lithium-Ion roj teeb cov ntaub ntawv tseem ceeb yog qhov tseem ceeb rau kev tshawb fawb thiab kev tsim khoom, kev tswj hwm kev tsim khoom, thiab kev ruaj ntseg zoo.

Khawm lithium{0}}ion roj teeb tsim khoom

Ib lub xovtooj ntawm npib, tseem hu ua khawm xovtooj lossis ib nrab- xovtooj ntawm tes, feem ntau siv lithium hlau ua cov electrode tsis zoo thiab cov khoom siv electrode zoo li cov electrode zoo; los yog lithium hlau raws li qhov zoo electrode thiab cov khoom tsis zoo electrode raws li qhov tsis zoo electrode. Nws qhov me me, tsis siv cov khoom siv hauv electrode fabrication, thiab kev hloov pauv siab ua rau nws yog ib qho tseem ceeb rau kev txhim kho thiab kuaj cov khoom siv rau lithium - ion roj teeb.

Nyob rau hauv lub electrode fabrication theem, cov ntaub ntawv thiab reagents yuav tsum muaj xws li zoo thiab tsis zoo electrode cov ntaub ntawv, conductive agents, binders, thiab tam sim no collectors. Ua ntej, cov khoom siv zoo thiab tsis zoo electrode active cov khoom, cov neeg ua haujlwm, thiab cov binders yog sib xyaw ua ke hauv ib qho piv txwv uas siv phau ntawv sib tsoo lossis tshuab homogenization. Tom qab ntawd, lub resulting slurry yog coated mus rau tus coj tam sim no collector. Hauv chav kuaj txheej, txheej txheej txheej yog txiav txim siab raws li tus nqi ntawm slurry. Rau cov slurries loj, lub tshuab me me yog siv (Daim duab (a)); rau cov slurries me me, ib zaj duab xis- cov cuab yeej tsim yog siv rau txheej txheej (Daim duab (b)). Tom qab ntawd cov electrode yog qhuav hauv qhov cub kom qhuav thiab compacted los ntawm cov menyuam nias. Slicing yog txheej txheem kom raug txiav cov electrode rau hauv cov voj voog. Feem ntau, cov menyuam - nias electrode yog clamped ntawm daim ntawv hnyav thiab muab tso rau hauv lub tshuab xuas nrig kom nrawm nrawm tawm cov khoom me me. Txoj kab uas hla ntawm cov khoom me me tuaj yeem hloov kho los ntawm kev xuas nrig ntaus tuag loj ntawm lub tshuab xuas nrig ntaus.