Masiku ano, makampani osiyanasiyana amagalimoto akugwiritsa ntchito mabatire a lithiamu pamlingo waukulu mu mabatire amphamvu, ndipo kachulukidwe ka mphamvu kakukwera kwambiri, koma anthu amapaka utoto ndi chitetezo cha mabatire amphamvu, ndipo si njira yabwino yothetsera chitetezo chamagetsi. mabatire.Thermal Runaway ndiye chinthu chachikulu chofufuzira chachitetezo cha batri yamphamvu, ndipo ndikofunikira kuyang'anapo.
Choyamba, tiyeni timvetsetse chomwe ndi kuthawa kwa matenthedwe.Thermal runaway ndi zochitika za unyolo zomwe zimayambitsidwa ndi zoyambitsa zosiyanasiyana, zomwe zimapangitsa kutentha kwakukulu ndi mpweya woipa wotulutsidwa ndi batire mkati mwa nthawi yochepa, zomwe zingayambitse ngakhale batire kuti igwire moto ndikuphulika muzochitika zazikulu.Pali zifukwa zambiri za kuthawira kwa matenthedwe, monga kutenthedwa, kuchulukirachulukira, dera lalifupi lamkati, kugundana, ndi zina zambiri. Kuwonongeka kwa diaphragm, zomwe zimapangitsa kuti electrode yoyipa ndi electrolyte, kutsatiridwa ndi kuwonongeka kwa electrode yabwino ndi electrolyte, motero kumayambitsa dera lalikulu lamkati lamkati, kuchititsa kuti electrolyte iyake, yomwe imafalikira ku maselo ena, kuchititsa kutha kwamphamvu kwamafuta ndikulola kuti batire lonselo liziyaka modzidzimutsa.
Zomwe zimayambitsa kuthawa kwamafuta zimatha kugawidwa m'magulu amkati ndi kunja.Zomwe zimayambitsa mkati nthawi zambiri zimakhala chifukwa cha maulendo afupipafupi amkati;zifukwa zakunja zimayamba chifukwa cha nkhanza zamakina, kugwiritsa ntchito mphamvu zamagetsi, nkhanza zamafuta, etc.
Dongosolo lalifupi lamkati, lomwe ndi kulumikizana kwachindunji pakati pa ma terminals abwino ndi oyipa a batri, amasiyana kwambiri pamlingo wa kukhudzana ndi zomwe zimachitika pambuyo pake.Nthawi zambiri chiwongolero chachikulu chamkati chomwe chimabwera chifukwa cha nkhanza zamakina ndi kutentha kumayambitsa kutha kwa kutentha.Mosiyana ndi zimenezi, mabwalo amkati amkati omwe amadzipangira okha amakhala ochepa, ndipo kutentha komwe kumapanga kumakhala kochepa kwambiri kotero kuti sikuyambitsa kutentha kwachangu.Kudzitukumula kwamkati nthawi zambiri kumaphatikizapo zolakwika zopanga zinthu, kuwonongeka kwa zinthu zosiyanasiyana zomwe zimayambitsidwa ndi ukalamba wa batri, monga kuchuluka kwa kukana kwamkati, ma depositi achitsulo a lithiamu omwe amayamba chifukwa chogwiritsa ntchito molakwika kwa nthawi yayitali, ndi zina zambiri. zifukwa zamkati zidzawonjezeka pang'onopang'ono.
Makina nkhanza, amatanthauza mapindikidwe a lithiamu batire monomer ndi batire paketi pansi pa zochita za mphamvu kunja, ndi kusamutsidwa wachibale wa mbali zosiyanasiyana palokha.Mitundu yayikulu yotsutsana ndi selo yamagetsi imaphatikizapo kugunda, kutulutsa ndi kuphulika.Mwachitsanzo, chinthu chachilendo chomwe chinakhudzidwa ndi galimotoyo pa liwiro lalikulu chinayambitsa kugwa kwa diaphragm ya mkati mwa batri, yomwe inachititsa kuti batire ikhale yochepa kwambiri ndipo inayambitsa kuyaka modzidzimutsa mkati mwa nthawi yochepa.
Kugwiritsidwa ntchito molakwika kwa magetsi kwa mabatire a lithiamu nthawi zambiri kumaphatikizapo kufupikitsa kwakunja, kuchulukirachulukira, kutulutsa mitundu ingapo, yomwe imatha kukhala njira yothawirako kutentha.Kunja kwafupipafupi kumachitika pamene ma conductor awiri omwe ali ndi mphamvu zosiyana amalumikizidwa kunja kwa selo.Akabudula akunja mu mapaketi a batri amatha kukhala chifukwa cha kusinthika komwe kumachitika chifukwa cha kugunda kwa magalimoto, kumizidwa m'madzi, kuipitsidwa kwa conductor kapena kugwedezeka kwamagetsi pakukonza.Nthawi zambiri, kutentha komwe kumatulutsidwa kuchokera kufupi kwakunja sikutenthetsa batire kusiyana ndi kuphulika.Kulumikizana kofunikira pakati pa dera lalifupi lakunja ndi kuthawa kwa kutentha ndi kutentha komwe kumafika mpaka kutenthedwa.Ndi pamene kutentha kopangidwa ndi dera lalifupi lakunja sikungatheke bwino kuti kutentha kwa batri kumakwera ndipo kutentha kwakukulu kumayambitsa kuthawa kwa kutentha.Chifukwa chake, kudula kwaposachedwa kwanthawi yayitali kapena kutaya kutentha kopitilira muyeso ndi njira zolepheretsera kagawo kakang'ono kakunja kuti zisawonongeke.Kuchulukirachulukira, chifukwa chokhala ndi mphamvu zambiri, ndi chimodzi mwazowopsa kwambiri zogwiritsa ntchito molakwika magetsi.Kapangidwe ka kutentha ndi gasi ndi zinthu ziwiri zomwe zimafala kwambiri pakuchulukirachulukira.Kutentha kwa kutentha kumachokera ku kutentha kwa ohmic ndi machitidwe a mbali.Choyamba, lithiamu dendrites imakula pamtunda wa anode chifukwa cha kuyika kwa lithiamu kwambiri.
Njira zodzitchinjiriza pakutha kwa kutentha:
Mu kudzikonda opangidwa kutentha siteji ziletsa matenthedwe kuthawira pachimake, tili ndi njira ziwiri, mmodzi ndi kusintha zinthu za pachimake, akamanena za kuthawira matenthedwe makamaka lagona kukhazikika kwa zinthu zabwino ndi zoipa elekitirodi ndi. electrolyte.M'tsogolomu, tiyeneranso kupanga zopambana apamwamba mu ❖ kuyanika zinthu cathode, kusinthidwa, ngakhale homogeneous electrolyte ndi elekitirodi, ndi kuwongolera matenthedwe madutsidwe pachimake.Kapena sankhani ma electrolyte okhala ndi chitetezo chambiri kuti musewere ngati choletsa moto.Kachiwiri, ndikofunikira kugwiritsa ntchito njira zowongolera zotenthetsera (PTC Coolant Heater/ PTC Air Heater) kuchokera kunja kuti athetse kutentha kwa batri ya Li-ion, kuti atsimikizire kuti filimu ya SEI ya selo silidzakwera kutentha kwa kutentha, ndipo mwachibadwa, kuthawa kwa kutentha sikudzachitika.
Nthawi yotumiza: Mar-17-2023
