1. Kuchepetsa moto kwa electrolyte
Electrolyte flame retardants ndi njira yabwino kwambiri yochepetsera chiopsezo cha kuthawa kwa matenthedwe kwa mabatire, koma zotsalira zamoto izi nthawi zambiri zimakhudza kwambiri ntchito ya electrochemical ya mabatire a lithiamu ion, kotero ndizovuta kugwiritsa ntchito pochita. Kuti athetse vutoli, a yunivesite ya California, San Diego, YuQiao gulu [1] ndi njira kapisozi ma CD adzakhala lawi retardant DbA (dibenzyl amine) kusungidwa mkati mwa kapisozi yaying'ono, anamwazikana mu electrolyte, mu Nthawi zokhazikika sizingakhudze magwiridwe antchito a mabatire a lithiamu-ion adawonekera, koma maselo akawonongeka ndi mphamvu yakunja monga extrusion, The retardants lawi mu makapisozi awa amamasulidwa, kuwononga batri ndikupangitsa kuti lilephereke, potero limachenjeza. kuthawa kwa matenthedwe. Mu 2018, gulu la YuQiao [2] linagwiritsanso ntchito ukadaulo womwe uli pamwambapa, kugwiritsa ntchito ethylene glycol ndi ethylenediamine ngati zoletsa moto, zomwe zidakulungidwa ndikuyikidwa mu batri ya lithiamu ion, zomwe zidapangitsa kutsika kwa 70% pa kutentha kwakukulu kwa batri ya lithiamu ion panthawiyi. kuyesa kwa pini, kuchepetsa kwambiri chiopsezo cha kutentha kwa batri ya lithiamu ion.
Njira zomwe tazitchula pamwambazi ndizodziwononga zokha, zomwe zikutanthauza kuti moto woyaka moto ukagwiritsidwa ntchito, batire yonse ya lithiamu-ion idzawonongedwa. Komabe, gulu la AtsuoYamada ku yunivesite ya Tokyo ku Japan [3] linapanga ma electrolyte oletsa moto omwe sangakhudze magwiridwe antchito a mabatire a lithiamu-ion. Mu electrolyte iyi, kuchuluka kwa NaN (SO2F) 2 (NaFSA) kapenaLiN (SO2F) 2 (LiFSA) idagwiritsidwa ntchito ngati mchere wa lithiamu, ndipo trimethyl phosphate TMP yoletsa moto wamba idawonjezedwa ku electrolyte, yomwe idakulitsa kukhazikika kwamafuta. batire ya lithiamu ion. Komanso, kuwonjezera lawi retardant sanali kukhudza mkombero ntchito ya lithiamu ion batire. Electrolyte imatha kugwiritsidwa ntchito mopitilira 1000 (1200 C / 5 mizungu, 95% yosunga mphamvu).
Makhalidwe oletsa malawi a mabatire a lithiamu ion kudzera mu zowonjezera ndi imodzi mwa njira zodziwitsira mabatire a lithiamu ion kuti azitenthedwa osatha kuwongolera. Anthu ena amapezanso njira yatsopano yoyesera kuchenjeza za kuchitika kwa dera lalifupi mu mabatire a lithiamu ion omwe amayamba chifukwa cha mphamvu zakunja kuchokera ku muzu, kuti akwaniritse cholinga chochotsa pansi ndikuchotseratu zochitika za kutentha kosalamulirika. Poganizira zamphamvu zomwe zingakhudze mabatire a lithiamu ion omwe amagwiritsidwa ntchito, GabrielM.Veith wochokera ku Oak Ridge National Laboratory ku United States adapanga electrolyte yokhala ndi kumeta ubweya wa ubweya [4]. Electrolyte iyi imagwiritsa ntchito mphamvu zamadzi omwe si a Newtonian. Mu chikhalidwe chachibadwa, electrolyte ndi madzi. Komabe, ikakumana ndi chiwopsezo chadzidzidzi, imawonetsa mawonekedwe olimba, imakhala yamphamvu kwambiri, ndipo imatha kukwaniritsa zotsatira zachitetezo cha zipolopolo. Kuchokera muzu, imachenjeza za chiopsezo cha kuthawa kwamoto chifukwa chafupipafupi mu batire pamene mphamvu ya lithiamu ion batire ikugunda.
2. Mapangidwe a batri
Kenako, tiyeni tione mmene kuyika mabuleki pa matenthedwe kuthawa kuchokera mlingo wa maselo batire. Pakalipano, vuto la kuthawa kwamafuta likuganiziridwa pakupanga mapangidwe a mabatire a lithiamu ion. Mwachitsanzo, nthawi zambiri pamakhala chivundikiro chapamwamba cha batri la 18650, chomwe chimatha kumasula nthawi yake kupanikizika kwambiri mkati mwa batri pamene kutentha kwatha. Kachiwiri, padzakhala zabwino kutentha coefficient chuma PTC mu batire chivundikirocho. Pamene kutentha kwamoto kumakwera, kukana kwa zinthu za PTC kudzawonjezeka kwambiri kuti kuchepetsa zamakono komanso kuchepetsa kutentha kwa kutentha. Komanso, mu kamangidwe ka kamangidwe ka batire limodzi ayenera kuganiziranso odana ndi lalifupi dera kamangidwe pakati pa mizati zabwino ndi zoipa, tcheru chifukwa cha misoperation, zotsalira zitsulo ndi zinthu zina chifukwa batire yochepa dera, kuchititsa ngozi chitetezo.
Pamene kapangidwe wachiwiri mu mabatire, ayenera kugwiritsa ntchito kwambiri otetezeka diaphragm, monga basi chatsekedwa pore atatu wosanjikiza pore pa kutentha kwa diaphragm, koma m'zaka zaposachedwapa, ndi kuwongolera batire mphamvu kachulukidwe, woonda diaphragm pansi chizolowezi. diaphragm yokhala ndi zigawo zitatu yayamba kutha pang'onopang'ono, m'malo mwa zokutira za ceramic za diaphragm, zokutira za ceramic ku zolinga zothandizira diaphragm, kuchepetsa kutsika kwa diaphragm pa kutentha kwakukulu, Kupititsa patsogolo kutentha kwa batri ya lithiamu ion ndi kuchepetsa chiopsezo cha kuthawa kwamafuta kwa batri ya lithiamu ion.
3. Battery paketi chitetezo matenthedwe kapangidwe
Pogwiritsidwa ntchito, mabatire a lithiamu ion nthawi zambiri amapangidwa ndi mabatire angapo, mazana kapena masauzande ambiri kudzera mu mndandanda ndi kulumikizana kofananira. Mwachitsanzo, paketi ya batri ya Tesla ModelS imakhala ndi mabatire opitilira 7,000 18650. Ngati imodzi mwa mabatire itaya mphamvu yamafuta, imatha kufalikira mu paketi ya batri ndikuyambitsa zowopsa. Mwachitsanzo, mu January 2013, batire ya kampani ya ku Japan yotchedwa Boeing 787 lithium ion inapsa ndi moto mumzinda wa Boston, m’dziko la United States. Malinga ndi kafukufuku wa National Transportation Safety Board, batire ya 75Ah square lithium ion mu batire ya batri idapangitsa kuti mabatire oyandikana nawo athawe. Izi zitachitika, Boeing adafuna kuti mapaketi onse a batri akhale ndi njira zatsopano zopewera kufalikira kosalamulirika kwa kutentha.
Pofuna kupewa kuthawira kwa matenthedwe kufalikira mkati mwa mabatire a lithiamu ion, AllcellTechnology idapanga zida zodzipatula zotenthetsera PCC zamabatire a lithiamu ion kutengera zinthu zosintha gawo [5]. PCC zakuthupi wodzazidwa pakati monomer lifiyamu ion batire, pa nkhani ya ntchito yachibadwa ya lifiyamu ion batire paketi, batire paketi kutentha akhoza kudutsa zinthu PCC mwamsanga kunja kwa paketi batire, pamene matenthedwe kuthawa mu lithiamu ion Mabatire, zinthu za PCC mwa kusungunuka kwake kwa parafini kusungunuka zimayamwa kutentha kwambiri, zimalepheretsa kutentha kwa batri kukwera kwambiri, motero kuchenjeza kuti kutentha sikutha kulamulira mu batire paketi kufalikira kwamkati. Pakuyesa kwa pinprick, kutha kwa batire imodzi mu batire yopangidwa ndi zingwe za 4 ndi 10 za mapaketi a batri a 18650 popanda kugwiritsa ntchito zinthu za PCC pamapeto pake zidapangitsa kuti mabatire a 20 athawe mu paketi ya batri, pomwe kutha kwa batire imodzi. batire mu paketi ya batri yopangidwa ndi zinthu za PCC silinapangitse kuthawa kwa mapaketi ena a batri.
Nthawi yotumiza: Feb-25-2022