Kuyiniinsimbi ye-lithiumibhethri? Isingeniso esimisweni sokusebenza kanye nezinzuzo zebhethri yensimbi ye-lithium

Ibhethri lensimbi ye-lithium uhlobo lwebhethri emndenini webhethri le-lithium. Igama layo eliphelele yibhethri le-lithium iron phosphate lithium ion. Izinto ze-cathode ikakhulukazi yi-lithium iron phosphate. Ngenxa yokuthi ukusebenza kwayo kufaneleka kakhulu ekusetshenzisweni kwamandla, ibizwa nangokuthi “ibhethri lamandla lensimbi ye-lithium”. (ebizwa nangokuthi “ibhethri lensimbi ye-lithium”)

Isimiso sokusebenza sebhethri le-lithium iron (LiFePO4)
Isakhiwo sangaphakathi sebhethri le-LiFePO4: I-LiFePO4 enesakhiwo se-olivine ngakwesobunxele isetshenziswa njenge-pole enhle yebhethri, exhunywe nge-aluminium foil kanye ne-pole enhle yebhethri. Phakathi nendawo kukhona i-polymer diaphragm, ehlukanisa i-pole enhle ne-pole engemihle. Kodwa-ke, i-lithium ion i-Li+ ingadlula kodwa i-electronic e – ayikwazi. Ngakwesokudla kukhona i-pole engemihle yebhethri eyakhiwe nge-carbon (i-graphite), exhunywe nge-copper foil kanye ne-pole engemihle yebhethri. I-electrolyte yebhethri iphakathi kwezingxenye eziphezulu nezingezansi zebhethri, futhi ibhethri ivalwe ngegobolondo lensimbi.

Uma ibhethri le-LiFePO4 lishajwa, i-lithium ion Li+ku-electrode elungile ithuthela ku-electrode engalungile nge-membrane ye-polymer; Ngesikhathi senqubo yokukhipha, i-lithium ion Li+ku-electrode engalungile ithuthela ku-electrode elungile nge-diaphragm. Ibhethri le-lithium-ion liqanjwe ngokufuduka kwama-ion e-lithium ngesikhathi sokushaja nokukhipha.

Ukusebenza okuyinhloko kwebhethri le-LiFePO4
I-voltage ejwayelekile yebhethri le-LiFePO4 ingu-3.2 V, i-voltage yokushaja yokugcina ingu-3.6 V, kanti i-voltage yokukhipha yokugcina ingu-2.0 V. Ngenxa yekhwalithi ehlukene kanye nenqubo yezinto ze-electrode ezinhle nezimbi kanye nezinto ze-electrolyte ezisetshenziswa abakhiqizi abahlukahlukene, ukusebenza kwazo kuzohluka kancane. Isibonelo, umthamo webhethri wemodeli efanayo (ibhethri ejwayelekile ephaketheni elifanayo) uhlukile kakhulu (10% ~ 20%).

Izinzuzo zeibhethri yensimbi ye-lithium
Uma kuqhathaniswa namabhethri endabuko e-lead-acid, amabhethri e-lithium-ion anezinzuzo ezibalulekile ku-voltage yokusebenza, ukuminyana kwamandla, impilo yomjikelezo, njll. Uma kuqhathaniswa nebhethri lendabuko le-lead-acid, linalezi zinzuzo ezilandelayo: ukuminyana kwamandla aphezulu, ukuphepha okuqinile, ukusebenza kahle kwezinga lokushisa eliphezulu, amandla aphezulu okukhipha, impilo yomjikelezo omude, isisindo esincane, izindleko zokuqinisa igumbi lomshini ezonga imali, usayizi omncane, impilo yebhethri ende, ukuphepha okuhle, njll.