TianJinlishen, Guoxuan Hi-Tech thiab lwm pab pawg tau pib ua tiav cov kev tshawb fawb thiab kev loj hlob ntawm 300 Wh / kg fais fab roj teeb. Tsis tas li ntawd, tseem muaj ntau lub koom haum ua haujlwm cuam tshuam txog kev txhim kho thiab kev tshawb fawb.

Cov khoom sib xyaw ua ke ntawm cov roj teeb lithium-ion hloov pauv feem ntau suav nrog cov khoom siv hluav taws xob zoo, cov hluav taws xob tsis zoo, cov khoom sib cais, cov khoom siv hluav taws xob, thiab lwm yam khoom siv tsim nyog, xws li tabs, tapes, thiab aluminium plastics. Raws li qhov xav tau ntawm kev sib tham, tus sau ntawm daim ntawv no tau faib cov khoom siv hauv cov roj teeb lithium-ion rau hauv ob pawg: kev sib xyaw ntawm cov ncej ncej thiab cov khoom siv tsis muaj zog. Cov ncej ncej yog hais txog qhov zoo electrode ntxiv rau qhov tsis zoo electrode, thiab tag nrho cov electrodes zoo thiab qhov tsis zoo electrode tuaj yeem suav tau tias yog kev sib xyaw ntawm cov ncej piece units uas muaj li ntawm ob peb ncej ncej; Cov khoom siv hluav taws xob tsis yog xa mus rau tag nrho lwm yam khoom tshwj tsis yog kev sib xyaw ntawm cov ncej ncej, xws li diaphragms, electrolytes, ncej lugs, aluminium plastics, tiv thaiv daim kab xev thiab txiav. daim kab xev thiab lwm yam. Rau cov hom LiMO 2 (M = Co, Ni thiab Ni-Co-Mn, thiab lwm yam) / carbon system Li-ion roj teeb, kev sib xyaw ntawm cov ncej piece units txiav txim siab lub peev xwm thiab lub zog ntawm lub roj teeb.

Tam sim no, txhawm rau ua tiav lub hom phiaj ntawm 300Wh / kg ntawm roj teeb loj tshwj xeeb lub zog, cov txheej txheem tseem ceeb suav nrog:

(1) Xaiv cov khoom siv uas muaj peev xwm, qhov zoo electrode yog ua los ntawm cov nickel ternary siab, thiab cov electrode tsis zoo yog ua los ntawm silicon carbon;

(2) Tsim high-voltage electrolyte los txhim kho tus nqi txiav tawm voltage;

(3) Txhim kho cov qauv ntawm qhov zoo thiab qhov tsis zoo electrode slurry thiab nce qhov feem ntawm cov khoom siv hauv electrode;

(4) Siv cov ntawv nyias nyias thiab cov ntawv txhuas kom txo tau qhov feem ntawm cov khoom siv tam sim no;

(5) Ua kom cov txheej txheej ntawm qhov zoo thiab qhov tsis zoo electrodes, thiab ua kom muaj kev faib ua feem ntawm cov khoom siv hauv cov electrodes;

(6) Tswj tus nqi ntawm cov electrolyte, txo cov electrolyte thiab nce lub zog tshwj xeeb ntawm lithium-ion roj teeb;

(7) Ua kom zoo rau cov qauv ntawm lub roj teeb thiab txo qhov kev faib ua feem ntawm cov tab thiab cov khoom ntim hauv lub roj teeb.

Ntawm peb lub roj teeb hom cylindrical, square hard plhaub thiab cov ntawv mos-pob laminated, cov roj teeb muag muag muaj cov yam ntxwv ntawm kev tsim qauv yooj yim, lub teeb yuag, tsis muaj kev tiv thaiv sab hauv, tsis yooj yim tawg, thiab ntau lub voj voog, thiab lub zog tshwj xeeb. kev ua tau zoo ntawm lub roj teeb kuj tseem zoo heev. Yog li ntawd, lub laminated soft-pack fais fab lithium-ion roj teeb yog ib lub ntsiab lus kub tshawb fawb tam sim no. Nyob rau hauv cov qauv tsim txheej txheem ntawm laminated mos-pob fais fab lithium-ion roj teeb, lub ntsiab sib txawv yuav muab faib ua XNUMX yam nram qab no. Thawj peb tuaj yeem txiav txim siab los ntawm theem ntawm cov txheej txheem electrochemical thiab tsim cov cai, thiab peb qhov kawg yog feem ntau yog cov qauv tsim. hloov pauv ntawm kev txaus siab.

(1) Cov ntaub ntawv zoo thiab tsis zoo electrode thiab formulations;

(2) Lub compaction ceev ntawm qhov zoo thiab tsis zoo electrodes;

(3) Qhov piv ntawm qhov tsis zoo electrode muaj peev xwm (N) rau qhov zoo electrode muaj peev xwm (P) (N / P);

(4) Tus naj npawb ntawm cov ncej ncej (sib npaug rau tus lej ntawm cov ncej zoo);

(5) Qhov zoo electrode txheej nyiaj (raws li kev txiav txim siab N / P, thawj zaug txiav txim siab qhov zoo electrode txheej, thiab tom qab ntawd txiav txim siab qhov tsis zoo electrode txheej);

(6) Lub cheeb tsam ib leeg ntawm ib qho zoo electrode (txiav txim siab los ntawm qhov ntev thiab dav ntawm qhov zoo electrode, thaum qhov ntev thiab dav ntawm qhov zoo electrode raug txiav txim siab, qhov loj ntawm qhov tsis zoo electrode kuj txiav txim siab, thiab qhov loj ntawm lub cell tuaj yeem txiav txim siab).

Ua ntej, raws li cov ntaub ntawv [1], kev cuam tshuam ntawm tus naj npawb ntawm cov ncej piece units, tus nqi ntawm qhov zoo electrode txheej thiab thaj tsam ntawm ib qho ntawm ib qho zoo electrode ntawm lub zog tshwj xeeb thiab lub zog ntom ntom ntawm cov roj teeb yog tham. Lub zog tshwj xeeb (ES) ntawm lub roj teeb tuaj yeem qhia tau los ntawm kev sib npaug (1).

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Nyob rau hauv cov mis (1): x yog tus naj npawb ntawm cov electrodes zoo muaj nyob rau hauv lub roj teeb; y yog cov txheej txheem ntawm qhov zoo electrode, kg / m2; z yog thaj tsam ib sab ntawm ib qho zoo electrode, m2; x∈N*, y> 0, z> 0; e(y,z) yog lub zog uas ib tug ncej piece unit tuaj yeem pab tau, Wh, tus lej suav yog qhia hauv mis (2).

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Nyob rau hauv formula (2): DAV yog qhov nruab nrab tawm voltage, V; PC yog qhov sib piv ntawm qhov loj ntawm cov khoom siv hluav taws xob zoo rau tag nrho cov khoom siv hluav taws xob zoo thiab cov khoom siv hluav taws xob thiab cov ntaub ntawv, %; SCC yog lub peev xwm tshwj xeeb ntawm cov khoom siv hluav taws xob zoo electrode, Ah / kg; m(y, z) yog qhov loj ntawm ib tug ncej piece unit, kg, thiab cov qauv kev suav yog qhia nyob rau hauv formula (3).

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Nyob rau hauv cov mis (3): KCT yog qhov piv ntawm tag nrho cov cheeb tsam ntawm lub monolithic zoo electrode (cov sum ntawm lub txheej txheej thiab tab foil cheeb tsam) mus rau ib leeg-sided cheeb tsam ntawm lub monolithic zoo electrode, thiab yog ntau dua 1; TAL yog lub thickness ntawm aluminium tam sim no collector, m; ρAl yog qhov ceev ntawm aluminium tam sim no collector, kg / m3; KA yog qhov piv ntawm tag nrho cheeb tsam ntawm txhua qhov tsis zoo electrode rau thaj tsam ib leeg ntawm ib qho zoo electrode, thiab ntau dua 1; TCu yog qhov tuab ntawm cov khoom siv tooj liab tam sim no, m; ρCu yog cov khoom siv tooj liab tam sim no. Qhov ceev, kg / m3; N / P yog qhov piv ntawm qhov tsis zoo electrode muaj peev xwm rau qhov zoo electrode muaj peev xwm; PA yog qhov piv ntawm qhov tsis zoo electrode active khoom loj rau tag nrho cov khoom ntawm qhov tsis zoo electrode active khoom ntxiv rau tus neeg saib xyuas thiab cov ntaub ntawv, %; SCA yog qhov piv ntawm qhov tsis zoo electrode active khoom Muaj peev xwm, Ah / kg. M (x, y, z) yog qhov loj ntawm cov khoom tsis muaj zog, kg, cov qauv kev suav qhia hauv mis (4)

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Hauv cov mis (4): kAP yog qhov sib piv ntawm thaj chaw aluminium-yas rau thaj tsam ib sab ntawm ib qho zoo electrode, thiab ntau dua 1; SDAP yog qhov ntom ntom ntawm aluminium-yas, kg / m2; mTab ​​yog tag nrho qhov loj ntawm qhov zoo thiab qhov tsis zoo electrodes, uas tuaj yeem pom los ntawm qhov tsis tu ncua; mTape yog tag nrho qhov loj ntawm daim kab xev, uas tuaj yeem suav tias yog qhov tas li; kS yog qhov piv ntawm tag nrho cheeb tsam ntawm lub separator rau tag nrho cheeb tsam ntawm daim ntawv zoo electrode, thiab yog ntau tshaj 1; SDS yog qhov ntom ntom ntawm qhov sib cais, kg / m2; kE yog qhov loj ntawm cov electrolyte thiab lub roj teeb Qhov piv ntawm lub peev xwm, cov coefficient yog tus lej zoo. Raws li qhov no, nws tuaj yeem txiav txim siab tias qhov nce ntawm ib qho ntawm x, y thiab z yuav nce lub zog tshwj xeeb ntawm lub roj teeb.

Txhawm rau kawm txog qhov tseem ceeb ntawm kev cuam tshuam ntawm tus naj npawb ntawm cov ncej ncej, cov txheej txheem ntawm qhov zoo electrode thiab thaj chaw ib leeg ntawm ib qho zoo electrode ntawm lub zog tshwj xeeb thiab lub zog ntom ntom ntawm lub roj teeb, ib qho electrochemical. system thiab tsim cov cai (uas yog, txiav txim siab cov khoom siv electrode thiab mis, Compaction ntom thiab N / P, thiab lwm yam), thiab tom qab ntawd orthogonally muab txhua qib ntawm peb yam, xws li tus naj npawb ntawm cov ncej ncej, tus nqi ntawm zoo electrode txheej, thiab thaj tsam ib leeg ntawm ib qho ntawm ib qho zoo electrode, los sib piv cov khoom siv hluav taws xob txiav txim siab los ntawm ib pawg neeg thiab qhov Range tsom xam tau ua los ntawm kev suav cov zog tshwj xeeb thiab lub zog ntom ntom ntawm lub roj teeb raws li cov khoom siv. formula, compacted ceev thiab N / P. Cov txiaj ntsig ntawm orthogonal tsim thiab suav cov txiaj ntsig tau pom nyob rau hauv Table 1. Cov txiaj ntsig ntawm orthogonal tsim tau raug tshuaj xyuas los ntawm ntau txoj kev, thiab cov txiaj ntsig tau pom hauv daim duab 1. Lub zog tshwj xeeb thiab lub zog ntom ntom ntawm lub roj teeb nce monotonically nrog cov naj npawb ntawm cov ncej ncej. , tus nqi ntawm qhov zoo electrode txheej, thiab ib leeg-sided cheeb tsam ntawm ib qho zoo electrode. Ntawm peb yam ntawm tus naj npawb ntawm cov ncej ncej, tus nqi ntawm qhov zoo electrode txheej, thiab ib leeg-sided cheeb tsam ntawm ib qho zoo electrode, tus nqi ntawm qhov zoo electrode txheej muaj qhov cuam tshuam loj tshaj plaws ntawm lub zog tshwj xeeb. roj teeb; Ntawm peb qhov tseem ceeb ntawm thaj tsam ib leeg ntawm , thaj tsam ib leeg ntawm monolithic cathode muaj qhov cuam tshuam loj tshaj plaws ntawm lub zog ceev ntawm lub roj teeb.

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daim duab

Nws tuaj yeem pom los ntawm daim duab 1a tias lub zog tshwj xeeb ntawm lub roj teeb nce monotonically nrog cov naj npawb ntawm cov ncej ncej, tus nqi ntawm cov txheej txheem cathode, thiab thaj tsam ib sab ntawm ib qho cathode, uas txheeb xyuas qhov tseeb ntawm theoretical tsom xam nyob rau hauv lub dhau los ib feem; qhov tseem ceeb tshaj plaws uas cuam tshuam rau lub zog tshwj xeeb ntawm lub roj teeb yog qhov zoo txheej txheej. Nws tuaj yeem pom los ntawm daim duab 1b tias lub zog ceev ntawm lub roj teeb nce monotonically nrog cov naj npawb ntawm cov ncej piece units, tus nqi ntawm qhov zoo electrode txheej, thiab thaj tsam ib sab ntawm ib qho zoo electrode, uas kuj txheeb xyuas qhov tseeb. ntawm yav dhau los theoretical tsom xam; Qhov tseem ceeb tshaj plaws cuam tshuam rau lub roj teeb hluav taws xob ceev yog ib qho chaw ntawm cov monolithic zoo electrode. Raws li kev soj ntsuam saum toj no, txhawm rau txhim kho lub zog tshwj xeeb ntawm lub roj teeb, nws yog qhov tseem ceeb kom nce qhov zoo ntawm cov electrode txheej kom ntau li ntau tau. Tom qab txiav txim siab qhov kev lees txais sab saud ntawm qhov zoo electrode txheej, kho cov qib tseem ceeb kom ua tiav cov neeg siv khoom xav tau; Rau lub zog ntom ntom ntawm lub roj teeb, nws yog tus yuam sij kom ua rau thaj tsam ib sab ntawm lub monolithic zoo electrode kom ntau li ntau tau. Tom qab txiav txim siab qhov kev lees txais sab saud ntawm thaj tsam ib sab ntawm lub monolithic zoo electrode, kho cov qib tseem ceeb kom tau raws li cov neeg siv khoom xav tau.

Raws li qhov no, nws tuaj yeem txiav txim siab tias lub zog tshwj xeeb thiab lub zog ntom ntom ntawm lub roj teeb monotonically nce nrog cov naj npawb ntawm cov ncej ncej, tus nqi ntawm cov txheej txheem zoo electrode, thiab thaj tsam ib leeg ntawm ib qho zoo electrode. Ntawm peb yam ntawm tus naj npawb ntawm cov ncej ncej, tus nqi ntawm qhov zoo electrode txheej, thiab thaj tsam ib leeg ntawm ib qho zoo electrode, qhov cuam tshuam ntawm qhov zoo electrode txheej ntawm lub zog tshwj xeeb ntawm lub roj teeb yog qhov tseem ceeb tshaj plaws; Ntawm peb qhov tseem ceeb ntawm thaj tsam ib leeg ntawm , thaj tsam ib leeg ntawm monolithic cathode muaj qhov cuam tshuam loj tshaj plaws ntawm lub zog ceev ntawm lub roj teeb.

Tom qab ntawd, raws li cov ntaub ntawv [2], nws tau tham txog yuav ua li cas txo cov roj teeb kom zoo thaum tsuas yog lub peev xwm ntawm lub roj teeb yuav tsum tau, thiab lub roj teeb loj thiab lwm yam ntsuas kev ua haujlwm tsis tas yuav tsum tau ua raws li kev txiav txim siab ntawm cov khoom siv thiab kev siv tshuab. qib. Kev suav ntawm cov roj teeb zoo nrog cov lej ntawm cov phiaj zoo thiab qhov sib piv ntawm cov phiaj zoo raws li cov kev hloov pauv ywj pheej tau qhia hauv cov qauv (5).

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Hauv formula (5), M(x, y) yog tag nrho cov loj ntawm lub roj teeb; x yog tus lej ntawm daim phiaj zoo hauv lub roj teeb; y yog qhov sib piv ntawm cov phiaj zoo (nws tus nqi yog sib npaug rau qhov dav faib los ntawm qhov ntev, raws li pom hauv daim duab 2); k1, k2, k3, k4, k5, k6, k7 yog coefficients, thiab lawv qhov tseem ceeb yog txiav txim siab los ntawm 26 tsis muaj feem xyuam rau cov roj teeb muaj peev xwm, cov khoom siv thiab cov txheej txheem thev naus laus zis, saib Table 2. Tom qab qhov tsis muaj nyob hauv Table 2 tau txiav txim siab. , txhua coefficient Nws yog ces txiav txim siab tias kev sib raug zoo ntawm 26 tsis thiab k1, k2, k3, k4, k5, k6, thiab k7 yog heev yooj yim, tab sis cov txheej txheem derivation yog heev cumbersome. Los ntawm kev ua lej muab cov lus tshaj tawm (5), los ntawm kev kho cov naj npawb ntawm cov phiaj zoo thiab cov nam piv ntawm cov phaj zoo, cov roj teeb yam tsawg kawg nkaus uas tuaj yeem ua tiav los ntawm cov qauv tsim tuaj yeem tau txais.

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Daim duab 2 Schematic daim duab ntawm qhov ntev thiab dav ntawm lub laminated roj teeb

Table 2 Laminated cell design parameters

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Hauv Table 2, tus nqi tshwj xeeb yog tus nqi ntawm cov roj teeb uas muaj peev xwm ntawm 50.3Ah. Cov kev ntsuas cuam tshuam txiav txim siab tias k1, k2, k3, k4, k5, k6, thiab k7 yog 0.041, 0.680, 0.619, 13.953, 8.261, 639.554, 921.609 raws. , x yog 21, y yog 1.97006 (qhov dav ntawm qhov zoo electrode yog 329 mln, thiab qhov ntev yog 167 hli). Tom qab optimization, thaum tus naj npawb ntawm cov electrode zoo yog 51, lub roj teeb zoo yog qhov tsawg tshaj plaws.