Deformation mechanism thiab kev tiv thaiv zoo ntawm Aluminium prismatic casing

Automotive roj teeb txhuas cov ntaub ntawv yog dav siv nyob rau hauv teb xws li lub zog tshiab tsheb vim lawv cov qauv kev cai thiab siab zog ceev. Txawm li cas los xij, vim nws cov yam ntxwv anisotropic, tsis sib npaug ntawm qhov ntev thiab dav cov lus qhia thaum lub sijhawm tsim khoom tuaj yeem yooj yim ua rau muaj teeb meem deformation xws li kev tsis sib xws, uas cuam tshuam rau kev nyab xeeb thiab kev pabcuam lub neej ntawm lub roj teeb. Qhov tshwm sim ntawm cov teeb meem deformation yog ze ze rau ntau yam xws li cov khoom siv, cov txheej txheem tsim khoom, thiab kev tswj ib puag ncig sab hauv ntawm cov roj teeb hluav taws xob.

Los ntawm qhov kev xav ntawm cov khoom siv thiab cov qauv tsim, kev xaiv thiab lub zog tsim ntawm Aluminium rooj plaub rau cov khoom siv hluav taws xob tshiab yog qhov tseem ceeb. Yog tias cov ntaub ntawv uas tsis muaj zog tensile tsis txaus (xws li 3003 aluminium alloy) los yog Lithium roj teeb txhuas cov khoom siv nrog lub thickness tsawg dua 0.6 hli, lawv yuav ua rau deformation nyob rau hauv siab thiab thermal stress. Nyob rau tib lub sijhawm, cov yam ntxwv ntawm qhov chaw vuam tsis tuaj yeem raug ignored: lub tshav kub cuam tshuam cheeb tsam tsim thaum lub sij hawm vuam yuav txo tau lub zog hauv zos los ntawm 20% mus rau 30% vim lub lattice reorganization, dhau los ua ib qho kev nyuaj siab concentration cheeb tsam uas yog nquag deformation thaum muaj kev ntxhov siab tom ntej.

Qhov laj thawj ntawm cov txheej txheem vuam muaj qhov kev txiav txim siab ntawm kev ruaj ntseg ntawm Aluminium prismatic casing. Laser welding, raws li cov txheej txheem tseem ceeb, yog tias cov khoom siv hluav taws xob tsis raug tswj xyuas kom zoo (xws li lub zog siab tshaj 300 W lossis vuam ceev hauv qab 30 mm / s), nws tuaj yeem ua rau cov kub hauv zos kom deb tshaj qhov melting point ntawm txhuas (660 degree), lub pas dej molten kom tob dhau, thiab cov cua txias shrinkage kev nyuaj siab nce sharply; Kev tsim cov hlaws tsis tsim nyog, xws li qhov tsis muaj kev ntxhov siab rau kev ntxhov siab nyob rau hauv lub nplhaib txuas txuas ntxiv thiab cov hlaws hlaws dav tsawg dua 0.8 hli, tuaj yeem txo cov load-cov kabmob muaj peev xwm ntawm cov vuam thiab ua rau muaj kev pheej hmoo ntawm deformation.

Qhov txawv txav sab hauv ntawm lub roj teeb yog lwm qhov tseem ceeb thermodynamic ua rau deformation. Thaum qhov kub siab tshaj 45 degree, cov kev cuam tshuam sab xws li electrolyte decomposition thiab kev puas tsuaj rau SEI zaj duab xis yuav ua rau kom cov roj ntau lawm. Thaum lub siab sab hauv siab tshaj 10 kPa, nws yuav thawb lub deformation ntawm Prismatic cell case. Nyob rau tib lub sijhawm, hauv lub xeev them tag nrho, qhov tsis zoo electrode nthuav dav tuaj yeem ncav cuag 20% ​​mus rau 30%. Yog tias qhov sib txawv ntawm lub roj teeb ntawm tes thiab cov phab ntsa sab hauv ntawm lub plhaub ntau tshaj 1.0 hli (kev lag luam tus qauv sib txawv yog 0.3 mus rau 0.8 hli), qhov kev nthuav dav tsis tuaj yeem cuam tshuam zoo los ntawm lub plhaub, thiab yuav tig mus rau qib siab ntawm kev ywj pheej nyob rau hauv txoj kab ntsug, ua rau deformation ntawm lub phaj npog lossis sab phab ntsa.

Tsis tas li ntawd, cov txheej txheem tswj kev sib txawv ntawm cov txheej txheem tsim khoom kuj tseem tuaj yeem ua rau muaj teeb meem deformation ntau dua: thaum qhov sib txawv ntawm cov phaj npog thiab lub zog tshiab txhuas cov roj teeb ntau dua 0.2 hli thaum sib dhos, vuam thermal kev nyuaj siab yuav ncaj qha ua rau deformation los ntawm superimposing nrog qhov sib txawv txav txav; Thaum lub tshuab nqus tsev kawm ntawv thaum lub sij hawm sealing yog tsawg dhau (qis dua -90 kPa), sab nraud atmospheric siab yuav ua rau lub cev tsis muaj zog ntawm lub plhaub, ua rau tsis muaj zog compression deformation.

Raws li cov txheej txheem deformation saum toj no, kev tiv thaiv thiab kev tswj hwm tuaj yeem tsim los ntawm cov khoom xws li kev txhim kho cov khoom siv, kev txhim kho cov txheej txheem, kev tswj siab sab hauv, thiab kev txhim kho cov txheej txheem. Hais txog cov khoom siv thiab kev ua kom zoo, lub tswv yim tseem ceeb yog txhawm rau txhim kho cov load-cov kabmob muaj peev xwm ntawm Aluminium roj teeb casing, uas tuaj yeem ua tiav los ntawm kev siv 5052 aluminium alloy nrog lub zog tensile ntau dua, ntxiv 0.5 mus rau 1.0 hli siab reinforcement ribs nyob rau sab saum toj cover cheeb tsam, thiab nce lub plhaub thickness mus rau 0.8 mus rau 1.0.

Nyob rau tib lub sijhawm, cov txheej txheem vuam sib xyaw ua ke nrog cov laser vuam thiab ultrasonic vuam yog siv los txo cov ntsiab lus ntawm cov cua sov thiab txhim kho qhov ruaj khov ntawm thaj chaw vuam. Kev txhim kho cov txheej txheem vuam ntawm Rechargeable aluminium plhaub yuav tsum tau tsom rau kev tswj kom zoo, siv lub zog gradient vuam zoo (xws li kev sib xyaw ua ke ntawm ntu pib 200 W / 30 mm / s, nruab nrab ntu 250 W / 25 mm / s, thiab xaus ntu 180 W), thiab tswj qhov tob ntawm thaj chaw tshav kub tsis pub dhau 0.5 hli; Nyob rau tib lub sijhawm, cov hlaws txuas txuas txuas ntxiv yuav raug hloov mus rau segmented vuam hom (5 mus rau 8 hli ib ntu), nrog rau thaj tsam 2 hli kev ntxhov siab tso tawm, thiab cov hlaws hlaws dav yuav nce mus rau 1.2 hli txhawm rau txhim kho lub peev xwm weld bearing.

Kev tswj lub siab sab hauv yuav tsum tau pib los ntawm ob yam: kev them nyiaj ntxiv thiab kev tawm tsam roj. Hauv kev tsim ntawm Lithium- ion roj teeb txhuas lub plhaub qauv, cov txheej txheem elastic buffer nrog compression tus nqi siab tshaj 50% tuaj yeem ntsia tau rau sab hauv ntawm lub phaj npog, tawm hauv 0.5 mus rau 1.0 hli ntawm qhov chaw nthuav dav kom txo qis qhov cuam tshuam los ntawm qhov tsis zoo electrode expansion; Hais txog kev ua kom zoo ntawm cov tshuaj lom neeg, ntxiv 1% mus rau 2% FEC zaj duab xis- tsim cov khoom siv ntxiv thaum lub sijhawm txhaj tshuaj tuaj yeem tiv thaiv kev puas tsuaj txawv txav rau SEI zaj duab xis, tswj cov roj ntau lawm ntawm tag nrho cov load li ntawm 0.5 ml / Ah, thiab txo qis sab hauv siab los ntawm qhov chaw.

Lub zog ntawm kev tswj cov txheej txheem yuav tsum muaj kev qhia txog cov cuab yeej ntse, siv qhov muag pom kev hauv cov txheej txheem sib dhos kom tswj tau qhov tseeb ntawm qhov chaw nyob hauv ± 0.05 hli; Nyob rau tib lub sijhawm, txhim kho cov vuam fixture mus tas li lub zog clamping hom kom paub meej tias lub clamping quab yuam hloov ntawm 20 mus rau 30 N tsis tshaj 5%, txo qhov kev pheej hmoo ntawm deformation los ntawm kev sib dhos sib txawv. Ntxiv qhov chaw ntsuas siab thaum lub sij hawm tsim, uas yuav cia li suab lub tswb thaum lub siab tshaj 5 kPa. Ua ke nrog X-ray nrhiav pom ntawm EV lub tsheb roj teeb lub plhaub deformation tus nqi, qhov pib yuav raug tswj tsis pub dhau 0.3% kom ua tiav qhov kev txheeb xyuas ntxov thiab tswj cov teeb meem deformation.

Yog tias koj ntsib teeb meem kev cuam tshuam txog covAluminium prismatic casingdeformation los yog xav tau cov txheej txheem optimization kev txhawb nqa thaum lub sij hawm tsim khoom, thov koj xav tiv tauj peb los ntawm lub platform, thiab peb yuav muab koj nrog kev daws teeb meem thiab kev sab laj kev sib tham.