Kuzungulira kwa batri ndi vuto lalikulu: mphamvu yamankhwala yomwe imasungidwa mu batri idzatayika ngati mphamvu yotentha, chipangizocho sichingagwiritsidwe ntchito.Panthawi imodzimodziyo, dera lalifupi limapanganso mbadwo wotentha kwambiri, womwe umangochepetsa mphamvu ya batri, koma ukhoza kuyambitsa moto kapena kuphulika chifukwa cha kuthawa kwa kutentha.Pofuna kuthetsa zinthu zomwe zingatheke mu chipangizo chomwe chingakhale chozungulira chachifupi ndikuwonetsetsa kuti dera lalifupi silipanga vuto la opaleshoni, tingagwiritse ntchito COMSOL Multiphysics kuphunzira kukonzekera mabatire a lithiamu-ion.
Kodi batire lalifupi limachitika bwanji?
Batire imatha kusintha mphamvu yamankhwala yosungidwa kukhala mphamvu yamagetsi.Panthawi yogwira ntchito bwino, ma elekitirodi awiri a batire amatulutsa ma electrochemical reaction of reduction reaction of negative electrode ndi makutidwe ndi okosijeni a anode.Panthawi yotulutsa, electrode yabwino ndi 0.10-600 ndipo electrode yolakwika ndi yabwino;panthawi yolipiritsa, zilembo ziwiri za electrode zimasinthidwa, ndiko kuti, electrode yabwino ndi yabwino ndipo electrode yolakwika ndi yoipa.
Electrode imodzi imatulutsa ma electron mu dera, pamene electrode ina imatenga ma electron kuchokera kudera.Ndiko kumveka bwino kwamankhwala kumeneku komwe kumayendetsa zomwe zikuchitika mozungulira motero chipangizo chilichonse, monga mota kapena babu, chimatha kupeza mphamvu kuchokera ku batri ikalumikizidwa nayo.
Zomwe zimatchedwa kuti dera lalifupi ndi pamene ma elekitironi samayenda mozungulira dera lolumikizidwa ndi chipangizo chamagetsi, koma amasuntha mwachindunji pakati pa ma electrode awiri.Popeza ma elekitironi safunikira kuchita ntchito iliyonse yamakina, kukana kumakhala kochepa kwambiri.Chotsatira chake, zochita za mankhwala zimafulumizitsa ndipo batri imayamba kudziyimitsa yokha, kutaya mphamvu yake ya mankhwala popanda kugwira ntchito yothandiza.Pakafupikitsidwa, kuchuluka kwamphamvu kumapangitsa kuti kukana kwa batri kukhale kotentha (kutentha kwa Joule), komwe kumatha kuwononga chipangizocho.
Kuwonongeka kwamakina mu batire ndi chimodzi mwazoyambitsa zafupipafupi.Ngati chinthu chakunja chachitsulo chiboola batire paketi kapena ngati batire lawonongeka pokanda, lipanga njira yolumikizira mkati ndikupanga kanjira kakang'ono."Pinprick test" ndiyeso yoyezetsa chitetezo pamabatire a lithiamu-ion.Pakuyesa, singano yachitsulo imaboola batire ndikuifupikitsa.
Pewani kufupikitsa kwa batri
Batire kapena paketi ya batire iyenera kutetezedwa kufupikitsa, kuphatikiza njira zopewera batire ndi phukusi lomwelo la zida zowongolera kuti zigwirizane.Mabatire amaikidwa m'mabokosi oyendetsa ndipo amayenera kupatulidwa kuchokera kwa wina ndi mzake mkati mwa bokosilo, ndi mitengo yabwino ndi yoyipa yolunjika mbali imodzi pamene mabatire ayikidwa mbali ndi mbali.
Kupewa kufupikitsa kwa mabatire kumaphatikizapo, koma sikumangokhalira, njira zotsatirazi.
a.Ngati n'kotheka, gwiritsani ntchito choyikapo chamkati chotsekedwa ndi zinthu zosagwiritsa ntchito (monga matumba apulasitiki) pa selo iliyonse kapena pa chipangizo chilichonse choyendera batire.
b.Gwiritsani ntchito njira yoyenera yopatula kapena kuyika batire kuti isakhumane ndi mabatire ena, zida, kapena zida zoyendetsera (monga zitsulo) mkati mwa paketi.
c.Gwiritsani ntchito zisoti zodzitchinjiriza zosagwiritsa ntchito ma conductive, tepi yotsekera, kapena njira zina zoyenera zodzitetezera pama electrode kapena mapulagi owonekera.
Ngati choyikapo chakunja sichingakane kugundana, ndiye kuti choyikapo chakunja chokha sichiyenera kugwiritsidwa ntchito ngati muyeso woletsa ma elekitirodi a batri kuti asathyoke kapena kufupikitsa.Batire iyeneranso kugwiritsa ntchito padding kuti iteteze kusuntha, apo ayi kapu ya elekitirodi imakhala yotayirira chifukwa cha kusuntha, kapena ma elekitirodi amasintha njira kuti apangitse dera lalifupi.
Njira zotetezera ma elekitirodi zikuphatikiza, koma sizimangokhala, izi:
a.Kulumikiza maelekitirodi motetezedwa pachivundikiro cha mphamvu zokwanira.
b.Batire imayikidwa mu phukusi lapulasitiki lolimba.
c.Gwiritsani ntchito kamangidwe kameneka kapena khalani ndi chitetezo china cha maelekitirodi a batri kuti maelekitirodi asathyoke ngakhale phukusi litatsitsidwa.
Nthawi yotumiza: Feb-07-2023