Kwiminyaka yakutshanje, iingxelo zomlilo kunye nokuqhuma okubangelwa iibhetri ze-lithium-ion zixhaphakile.Iibhetri ze-lithium-ion zenziwe ngokukodwa ngezinto ezingalunganga ze-electrode, i-electrolyte kunye nezinto ezintle ze-electrode. Umsebenzi weekhemikhali we-graphite ye-electrode engafanelekanga kwimeko ehlawuliswayo yinto efana ne-lithium yensimbi. Ifilimu ye-SEI phezu komhlaba yayiza kubola kwiqondo lokushisa eliphezulu, kwaye i-lithium ion efakwe kwi-graphite yayiza kusabela nge-electrolyte kunye ne-binder polyvinylidene fluoride kwaye ekugqibeleni yayiza kukhulula ubushushu obuninzi.

Izisombululo ze-Alkyl carbonate eziphilayo zisetyenziswa ngokuqhelekileyo njenge-electrolytes, ezinokutsha. Izinto eziphathekayo ze-electrode zidla ngokuba yi-oxide yensimbi yenguqu, eneempawu ezinamandla ze-oxidizing kwimeko ehlawulisiweyo, kwaye ibole ngokulula ukukhulula i-oksijini kwiqondo lokushisa eliphezulu. Ioksijini ekhutshiweyo idibana ne-electrolyte ukuze i-oxidize, kwaye emva koko iphume ubushushu obuninzi.

Ngokucacileyo, ibhetri ye-ion ye-lithium ayinakuzinza xa ifudumeza ngobushushu obuphezulu. Nangona kunjalo, kuya kwenzeka ntoni ukuba sihlala sifudumeza ibhetri? Apha senze uvavanyo lwangempela kwiseli ye-NCM egcwele ngokupheleleyo nge-voltage ye-3.7 V kunye nomthamo we-106 Ah.

Iindlela zoVavanyo:

1. Kwiqondo lokushisa kwegumbi (25 ± 2℃), iseli enye iqala ukukhutshwa kwi-voltage ephantsi yomda kunye nombane we-1C kwaye ushiye imizuzu eyi-15. Emva koko sebenzisa i-1C rhoqo yangoku ukuhlawulisa kwi-voltage yomda ophezulu kwaye utshintshe kwi-voltage yokutshaja rhoqo, yeka ukutshaja xa ukutshaja kwangoku kuhla ukuya kwi-0.05C, kwaye uyibeke ecaleni kwemizuzu eyi-15 emva kokutshaja;

2. Ukwandisa iqondo lokushisa ukusuka kwiqondo lokushisa ukuya kwi-200 ° C kwi-5 ° C / min, kwaye ugcine kwi-5 ° C ilitha nganye imizuzu engama-30;

Isiphelo:

Iiseli ze-lithium ekugqibeleni ziya kubamba umlilo xa ubushushu bovavanyo buqhubeka bunyuswa. Ukususela kule nkqubo ingasentla siqala ukubona ivalve yokukhupha ivuliwe, ulwelo lukhutshiwe; njengoko iqondo lobushushu linyuka ngakumbi, ukukhutshwa kolwelo okwesibini kwenzeke kwaye kuqalise ukutsha. Iiseli zebhetri aziphumelelanga malunga ne-138 ° C, eyayisele iphezulu kunobushushu obuqhelekileyo bovavanyo lwe-130 ° C.