Ukuze ufezekise ukutshaja okukhawulezayo, ibhetri, eyona nto ibalulekileyo kwisixhobo sokutshaja, nayo ifuna ukulungiswa.Ukutshaja ngokukhawuleza kwebhetri ikakhulu kuxhomekeke ekutshajweni nasekukhupheni ukukhulisa ibhetri.Kukho izizathu ezithathu eziphambili zokuchaphazela ukwandiswa kokutshaja: imathiriyeli ye-electrode, amandla okutshaja wemfumba yokutshaja kunye nobushushu bebhetri yamandla.Kumashishini ebhetri, amandla okutshaja iimfumba zokutshaja yinto enenjongo, kunye nezixhobo ze-electrode kunye nolawulo lobushushu kulapho iifektri zebhetri zinokwenza utshintsho.
Kwikhonkco lebhetri yamandla, ukukwazi ukutshaja ngokukhawuleza kwebhetri kuxhomekeke kwizinto ezininzi ezifana nesakhono se-lithium ekhawulezayo sokufakela i-electrode engalunganga, ukuqhutyelwa kwe-electrolyte, kunye nokukwazi ukulawula ukushisa kwenkqubo yebhetri.
Xa utshaja ngokukhawuleza, i-lithium ion kufuneka ikhawuleze kwaye ifakwe ngokukhawuleza kwi-electrode engalunganga.Oku kucela umngeni kwikhono le-electrode engalunganga ukufumana ngokukhawuleza i-lithium ion.Ukuba i-electrode engafanelekanga ayinayo i-high-speed lithium embedding capacity, i-lithium precipitation okanye i-lithium dendrite iya kwenzeka, okuya kukhokelela ekuthotyweni okungenakuguqulwa kwamandla ebhetri kunye nokunciphisa ubomi benkonzo.Ukongeza, i-electrolyte nayo ifuna ukuhanjiswa okuphezulu kwaye ifuna ukumelana nobushushu obuphezulu, i-flame retardant kunye ne-anti-overcharge.Kwelinye icala, ukutshaja okukhawulezileyo okunamandla aphezulu kuya kuzisa ukonyuka okukhulu kobushushu, kwaye ulawulo lwe-thermal yeepakethe zebhetri ezinombane omkhulu lubalulekile.
Ngokuqhelekileyo, kuyilo olukhuselekileyo lwepakethi yebhetri, ukukhuselwa kwe-thermal diffusion kunokwenziwa ngokufaka izinto zokugquma i-thermal kunye nokusebenza okuphezulu kokufakwa kwe-thermal, okufana ne-ceramic insulation pads kunye neebhodi ze-mica.Nangona kunjalo, ukongeza kukhuseleko lwe-thermal, izisombululo ezisebenzayo zokukhusela i-thermal nazo zibalulekile.KuMboniso weMoto weShanghai, amashishini ahlukeneyo ebhetri amandla nawo “abonise izakhono zawo” malunga nokuveliswa kwezinto ezintsha kunye nolawulo olupheleleyo lobushushu.
Ngaphambili, itekhnoloji yokutshaja ekhawulezayo kakhulu ngexesha le-Ningde igubungele uthungelwano lwe-elektroniki, iiringi ze-ion ezikhawulezayo, igraphite ye-isotropic, i-electrolyte ephezulu, i-pore diaphragms ephezulu, i-electrode ene-multi-gradient, iindlebe ezininzi, ukujonga okunokwenzeka kwe-anode, njl.
Itekhnoloji ye-Anotropic ivumela i-lithium ion ukuba ifakwe kwi-graphite channel 360 degrees ukuphucula kakhulu isantya sokutshaja.Ukubeka iliso okunokubakho kwe-Anode kunokulungelelanisa ukutshaja kwangoku ngexesha langempela, ukwenzela ukuba ibhetri inokunyusa umthamo wayo wokutshaja ngaphakathi koluhlu olukhuselekileyo ngaphandle kokuphendula kwe-lithium yecala, kunye nokufezekisa ukulingana phakathi kwesantya sokutshaja ngokugqithiseleyo kunye nokhuseleko.Ibhetri ye-ternary yeKirin ithatha i-nickel cathode ephezulu + i-silicon-based negative electrode system, ene-energy density ukuya kuma-255Wh/kg, exhasa i-5-minute ekhawulezayo yokuqalisa okushushu kunye ne-10min itshaja i-80%.Nangona kunjalo, ngexesha lokutshaja kunye nokukhutshwa kwenkqubo, ukwandiswa kwevolumu ye-silicon kunokuba phezulu kwi-400%, kwaye izinto ezisebenzayo zilula ukukhupha kwi-plate ye-polar, kubangela ukutshatyalaliswa ngokukhawuleza kwamandla kunye nokwenza i-membrane ye-SEI engazinzanga.Ke ngoko, izixhobo zokuqhuba ngexesha le-Ningde zisebenzisa i-carbon nanotubes enodonga olunye enobubanzi obuyi-1.5 ~ 2 nanotubes, ezibophelela ngakumbi kwi-silicon anode kwaye zinenethiwekhi eqhubayo.Nokuba amasuntswana e-silicon anode ayanda kumthamo kwaye aqale ukubonakala iintanda, angakwazi ukugcina unxibelelwano olulungileyo ngokusebenzisa i-carbon nanotubes enodonga olunye.Ukongeza, i-electrolyte yebhetri yeKirin ithatha i-LiFSI kwaye isebenzisa izongezo ze-FEC ukwenza i-lithium fluoride kwi-electrode engalunganga.I-ion radius incinci, enokulungisa iintanda ngexesha.Ngokumalunga nolawulo lwe-thermal, ibhetri yeKirin idibanisa inkqubo yokupholisa ulwelo kunye ne-thermal insulation pad kwi-multi-functional elastic sandwich phakathi kweeseli.Xa kuthelekiswa necebo lepleyiti elipholileyo lemveli elibekwe ngaphezulu kweseli, indawo yokuhambisa ubushushu iphindwe kane.Ndiyabulela kwindawo yokupholisa enkulu, ukusebenza kakuhle kokulawula ubushushu kweseli kuye kwanda ngama-50%.Ipleyiti yokupholisa ethe nkqo idala indawo ethe tyaba yokwahlulwa.Kukho iphepha lembuyekezo yokwandiswa + i-adiabatic airgel phakathi kweeseli ze-longitudinal, ezikhusela ngokufanelekileyo ubushushu ukuze kufezekiswe "zero thermal runaway".
Ixesha lokuposa: Jun-26-2023