1. Flame retardant ye electrolyte
Electrolyte flame retardants inzira inobatsira zvikuru yekudzikisa njodzi yekupisa kwekupisa kwemabhatiri, asi izvi zvinopisa moto zvinowanzova nemigumisiro yakakomba pakushanda kwe electrochemical ye lithium ion mabhatiri, saka zvakaoma kushandisa mukuita. Kuti agadzirise dambudziko iri, yeyunivhesiti yeCalifornia, San Diego, YuQiao timu [1] ine nzira yekuisa capsule packaging ichapisa retardant DbA (dibenzyl amine) yakachengetwa mukati meiyo micro capsule, yakapararira mu electrolyte, mukati. nguva dzakajairwa hadzizokanganisa kuita kwemabhatiri e-lithium ion payakaonekwa, asi kana masero kubva pakuparadzwa nechisimba chekunze senge extrusion, Iwo anodzoreredza murazvo mumakapisi aya anobva aburitswa, achiisa muchetura mubhatiri uye oita kuti itadze, nekudaro achizivisa. kune thermal runaway. Muna 2018, timu yaYuQiao [2] yakashandisa tekinoroji iri pamusoro zvakare, ichishandisa ethylene glycol uye ethylenediamine sezvinodzora murazvo, izvo zvakavharirwa uye kuiswa mubhatiri re lithium ion, zvichikonzera kudonha kwe70% mukupisa kwakanyanya kwe lithium ion bhatiri panguva. iyo pini yepini bvunzo, zvakanyanya kuderedza njodzi yekudzora kupisa kwe lithium ion bhatiri.
Nzira dzataurwa pamusoro apa dzinozviparadza, izvo zvinoreva kuti kana murazvo wemoto unoshandiswa, iyo yose lithium-ion battery ichaparadzwa. Nekudaro, timu yaAtsuoYamada payunivhesiti yeTokyo muJapan [3] yakagadzira murazvo unodzoreredza electrolyte isingakanganise mashandiro emabhatiri e-lithium-ion. Mune iyi electrolyte, huwandu hwakanyanya hweNaN (SO2F) 2 (NaFSA) kanaLiN (SO2F) 2 (LiFSA) yakashandiswa se lithium munyu, uye murazvo unowanzo retardant trimethyl phosphate TMP yakawedzerwa kune electrolyte, iyo yakavandudza zvakanyanya kugadzikana kwekupisa. ye lithium ion bhatiri. Uyezve, kuwedzerwa kwemurazvo wemoto hakuna kukanganisa kutenderera kwekuita kwe lithium ion bhatiri. Iyo electrolyte inogona kushandiswa kune anopfuura 1000 cycles (1200 C/5 kutenderera, 95% kugona kuchengetedza).
Iyo flame retardant mabhatiri e lithium ion mabhatiri kuburikidza nezvinowedzerwa ndiyo imwe yenzira dzekunyevera mabhatiri e-lithium ion kupisa kunze kwekutonga. Vamwe vanhu vanowanawo nzira itsva yekuedza kuchenjerera kuitika kwechikamu chiduku mumabhatiri e-lithium ion anokonzerwa nemasimba ekunze kubva pamudzi, kuitira kuti vawane chinangwa chekubvisa pasi uye kubvisa zvachose kuitika kwekupisa kunze kwekutonga. Tichifunga nezvekugona kuitika kwechisimba kwemagetsi e-lithium ion mabhatiri ari kushandiswa, GabrielM.Veith anobva kuOak Ridge National Laboratory muUnited States akagadzira electrolyte ine shear thickening properties [4]. Iyi electrolyte inoshandisa zvimiro zvezvisina-Newtonian zvinwiwa. Mumamiriro akajairika, iyo electrolyte imvura. Nekudaro, kana yakatarisana nekukanganisa kwakangoerekana kwaitika, inoburitsa chimiro chakasimba, ichiva chakasimba zvakanyanya, uye kunyange inogona kuwana mhedzisiro yebulletproof. Kubva pamudzi, inozivisa njodzi yekupisa kwekupisa kunokonzerwa nepfupi pfupi mubhatiri kana simba lithium ion bhatiri colliders.
2. Battery chimiro
Tevere, ngatitarisei maitiro ekuisa mabhureki pane inopisa inotiza kubva padanho remabhatiri maseru. Parizvino, dambudziko rekupisa kwekupisa rakatariswa mukugadzirwa kwemaitiro emabhatiri e lithium ion. Semuyenzaniso, panowanzova nevhavhavha yekumanikidzira muvhavha yepamusoro yebhatiri ye18650, iyo inogona kuburitsa panguva yakakodzera kudzvinyirirwa kwakanyanya mukati mebhatiri kana kupisa kunotiza. Chechipiri, pachave paine yakanaka tembiricha coefficient zvinhu PTC muvhavha yebhatiri. Kana kupisa kwekupisa kwekushisa kuchikwira, kuramba kwePTC zvinhu kuchawedzera zvakanyanya kuderedza ikozvino uye kuderedza chizvarwa chekupisa. Mukuwedzera, mukugadzirwa kwechimiro chebhatiri imwe chete inofanirawo kufunga nezve anti-short-circuit design pakati pemapango akanaka uye asina kunaka, kuchenjerera nekuda kwekuita misoperation, masara esimbi uye zvimwe zvinhu zvinokonzera bhatiri pfupi, zvichiita kuti njodzi dzichengetedze.
Kana yechipiri dhizaini mumabhatiri, inofanirwa kushandisa iyo yakachengeteka zvakanyanya diaphragm, senge otomatiki yakavharwa pore yeatatu-layer composite pakupisa kwepamusoro diaphragm, asi mumakore achangopfuura, nekuvandudzwa kwebhatiri simba density, yakatetepa diaphragm pasi pemaitiro e matatu-layer composite diaphragm zvishoma nezvishoma yave isingachashandi, yakatsiviwa neceramic coating ye diaphragm, ceramic coating kune diaphragm yekutsigira zvinangwa, kuderedza kuputika kwediaphragm pakupisa kwakanyanya, Kuvandudza kugadzikana kwekupisa kwe lithium ion bhatiri uye kuderedza njodzi Thermal runaway ye lithium ion bhatiri.
3. Battery pack thermal safety design
Mukushandiswa, mabhatiri e-lithium ion anowanzo kuumbwa nemakumi, mazana kana kunyange zviuru zvebhatiri kuburikidza nenhevedzano uye parallel kubatana. Semuenzaniso, bhatiri paki yeTesla ModelS ine anopfuura 7,000 18650 mabhatiri. Kana imwe yebhatiri ikarasikirwa nekudzora kupisa, inogona kupararira mubhatiri pack uye kukonzera mhedzisiro yakaipa. Somuenzaniso, muna January 2013, bhatiri reLithium ion rekambani yekuJapan rakabatira moto muBoston, United States. Zvinoenderana nekuferefetwa kweNational Transportation Safety Board, 75Ah square lithium ion bhatiri mubhatiri pack yakakonzera kutiza kwemabhatiri ari padyo. Mushure mechiitiko ichi, Boeing yaida kuti mabhatiri ese mapaketi ave nemaitiro matsva ekudzivirira kusingadzoreki kupararira kwekupisa.
Kuti udzivise kutiza kwekupisa kubva pakupararira mukati memabhatiri e-lithium ion, AllcellTechnology yakagadzira iyo inopisa inomhanya yekuzviparadzanisa nevamwe zvinhu PCC yemabhatiri e-lithium ion zvichienderana nechikamu chekuchinja zvinhu [5]. PCC zvinhu zvakazadzwa pakati pe monomer lithium ion bhatiri, kana iri basa rakajairwa re lithium ion bhatiri pack, bhatiri pack mukupisa rinogona kupfuudzwa nePCC zvinhu nekukurumidza kusvika kunze kwebhatiri pack, kana kupisa kunotiza mu lithium ion. mabhatiri, zvinhu zvePCC neparafini yemukati inonyunguduka inotora kupisa kwakawanda, kudzivirira kupisa kwebhatiri kukwira zvakanyanya, Saka chenjerera kupisa kusingadzoreki mubhatiri pack kupararira kwemukati. Muyedzo yepinprick, kupisa kunotiza kwebhatiri rimwe mubhatiri pack rine 4 uye 10 tambo dze18650 bhatiri packs pasina kushandisa PCC zvinhu zvakazokonzera kutiza kwekupisa kwemabhatiri e20 mubhatiri pack, ukuwo kupisa kwekutiza kweimwe. bhatiri mubhatiri pack rakagadzirwa nePCC zvinhu hazvina kukonzera kutiza kwekupisa kwemamwe mabhatiri mapaketi.
Nguva yekutumira: Feb-25-2022