Daim Ntawv Qhia Kev Muag Khoom: 5 Cov Kev Ntsuas Tseem Ceeb rau Kev Ntsuas Qhov Zoo ntawm EV Fuse Ceramic Vaj Tsev

Tsis yog txhua qhov ceramics raug tsim sib npaug-thiab rau EV ceramic fuse vaj tse, siab -purity alumina (Al₂O₃) ceramic yog tus qauv kub. Vim li cas?

Alumina muaj qhov sib xyaw ua ke ntawm thermal resistance, mechanical zog, thiab hluav taws xob rwb thaiv tsev -peb yam tsis muaj -kev sib tham rau EV fuses, uas ua haujlwm nyob rau hauv ib puag ncig uas kub tuaj yeem nce mus txog 150℃(302℃F) lossis siab dua (piv txwv li, nyob ze cov roj teeb lossis lub zog hluav taws xob).

Alumina purity feem pua:Lub hom phiaj rau ntau dua lossis sib npaug rau 95% purity. qis dua -purity ceramics (piv txwv li, 90% alumina) yuav muaj cov impurities xws li silica lossis magnesium oxide, uas txo cov thermal stability thiab ua rau muaj kev pheej hmoo ntawm kev tawg hauv kev ntxhov siab.
Sintering txheej txheem cov ntsiab lus:High-cov vaj tsev zoo yog sintered ntawm qhov kub thiab txias ntau dua lossis sib npaug li 1,600℃(2,912℃F) kom ntseeg tau tias ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Tsis zoo sintering ua rau cov ntaub ntawv ntxeem tau uas nqus dej noo (kev cuam tshuam kev rwb thaiv tsev) lossis ua tsis tiav hauv thermal shock.
Tsis txhob siv lwm yam xws li zirconia lossis cordierite ceramics: thaum pheej yig dua, lawv tsis muaj alumina ntev -lub sij hawm ua haujlwm ntev hauv EV- tej yam kev mob tshwj xeeb.

EVs tsis ua haujlwm nyob rau hauv qhov kub thiab txias tsis tu ncua-lawv ntsib lub viav vias nrawm, los ntawm sub- xoom txias (-20℃/-4℃F hauv lub caij ntuj no) mus rau kub kub (120℃/ 248℃F thaum them ceev). Qhov "thermal shock" no yog ib qho ntawm cov ua rau lub cev tsis zoo: yog tias cov khoom tsis tuaj yeem nthuav dav thiab cog lus sib npaug, nws yuav tawg, nthuav tawm cov fuse thiab pheej hmoo hluav taws xob luv lossis hluav taws kub.
Txhawm rau ntsuas cov thermal shock resistance, siv cov qauv kev lag luam xws li IEC 60664-1 (kev sib koom ua ke rwb thaiv tsev rau cov khoom siv hauv cov tshuab hluav taws xob tsawg) thiab nug cov neeg muag khoom los muab cov ntaub ntawv xeem rau:
Thermal voj voog kev ua tau zoo: Lub cev yuav tsum tiv taus 50+ cycles ntawm cua sov (150℃/ 302℃F) thiab txias (-40℃/-40℃F) tsis muaj cracking los yog delaminating.
Coefficient ntawm thermal expansion (CTE): Ib qho qis, ruaj khov CTE (alumina's CTE yog ~ 7.5 x 10⁻⁶ / degree) ua kom lub vaj tse tsis warp lossis cais los ntawm cov khoom nyob ib sab (piv txwv li, hlau terminals) thaum kub hloov.
Yog tias tus neeg muag khoom tsis tuaj yeem muab cov ntawv ceeb toom thib peb ntawm - tog thermal shock test, xav txog qhov no yog tus chij liab - lawv cov khoom yuav tsis muaj sia nyob tiag - ntiaj teb EV siv.

EV fuse tshuab tau tsim kho zoo heev, nrog rau kev ua siab ntev (feem ntau ± 0.1mm) los xyuas kom meej haum nrog fuses, terminals, thiab vaj tsev enclosures. Ib lub cev ceramic nrog qhov tsis zoo ntawm qhov tseeb tuaj yeem:
Tsim qhov sib txawv ntawm lub tsev thiab fuse, cia cov plua plav lossis ya raws nkag mus (kev cuam tshuam kev rwb thaiv tsev).
Misalign terminals, ua rau cov hluav taws xob tsis zoo thiab muaj zog tiv thaiv (uas ua rau muaj cua sov ntau).
Ua tsis tau raws li tus qauv ceramic fuse fuse thawv, yuav tsum tau them nqi kho dua lossis hloov kho.
Thaum ntsuas qhov tseeb, tsom mus rau peb qhov tseem ceeb:
Sab hauv kab noj hniav: Yuav tsum phim lub fuse sab nraud raws nraim (piv txwv li, 10mm rau tus qauv 10A EV fuse).
Terminal hole alignment: Qhov rau cov hlau terminals yuav tsum yog nruab nrab thiab perpendicular mus rau lub tsev nyob saum / hauv qab qhov chaw ( kam rau ua ± 0.05mm) kom tsis txhob terminal dabtsi yog khoov.
Phab ntsa thickness uniformity: Cov phab ntsa tsis sib xws (xws li, 1.5mm ntawm ib sab, 2.0mm ntawm lwm qhov) ua rau tsis sib xws thaum tshav kub kub, ua rau muaj kev pheej hmoo tawg.
Thov CNC machining daim ntawv pov thawj lossis cov ntaub ntawv ntsuas kho qhov muag (xws li, siv lub tshuab ntsuas kev sib koom tes, CMMs) txhawm rau txheeb xyuas qhov tseeb ntawm qhov tseeb-qhov no ua kom lub vaj tsev yuav sib txuas seamlessly rau hauv koj cov kab sib dhos uas twb muaj lawm.

CovEV Fuse Ceramic Housingyog kom insulate lub fuse los ntawm ib puag ncig cov khoom, tiv thaiv hluav taws xob to (uas nkim zog) los yog luv luv (uas tuaj yeem ua rau hluav taws kub). Rau EVs- qhov twg siab -voltage systems (400V lossis 800V) yog ib txwm muaj-kev ua haujlwm rwb thaiv tsev yog qhov tseem ceeb tshaj.​
Cov kev ntsuas tseem ceeb rau kev sim suav nrog:
Volume resistivity: Ntsuas hauv ohm -centimeters (Ω·cm), qhov no qhia tau tias cov khoom tiv thaiv hluav taws xob tam sim no zoo npaum li cas. Lub hom phiaj siab tshaj lossis sib npaug ntawm 10¹⁴ Ω·cm ntawm 25℃(77℃F)- tus qauv yam tsawg kawg nkaus rau siab -voltage EV Cheebtsam (ib ISO 6469-3, uas tswj EV kev nyab xeeb).​
Dielectric zog: Qhov siab tshaj plaws voltage lub cev tuaj yeem tiv taus yam tsis muaj kev tawg. Rau 400V EV systems, nrhiav lub zog dielectric Ntau dua lossis sib npaug li 15kV / hli; rau 800V tshuab, tsom rau Ntau dua lossis sib npaug rau 20kV / mm ..
Kev tiv thaiv dej noo: Tom qab raug rau 95% txheeb ze av noo (RH) rau 100 teev (ib IEC 60068-2-3), lub vaj tse rwb thaiv tsev kev ua tau zoo yuav tsum tsis txhob poob ntau tshaj 10%. Kev nqus dej noo yog qhov teeb meem tshwm sim nrog cov khoom siv tsis zoo, vim nws txo qis kev tiv thaiv.