Isitoreji samandlaamabhethri e-lithium iron phosphateasetshenziswa kabanzi emkhakheni wokugcinwa kwamandla, kodwa awekho amabhethri amaningi angenza ukuthi asebenze ngokuzinza isikhathi eside.Ukuphila kwangempela kwebhethri ye-lithium-ion kuthinteka yizinto ezihlukahlukene, kuhlanganise nezici zomzimba zeseli, izinga lokushisa elizungezile, izindlela zokusebenzisa njalonjalo.Phakathi kwazo, izici zomzimba zeseli zinomthelela omkhulu empilweni yangempela yamabhethri e-lithium-ion.Uma izici ezibonakalayo zeseli zingahlangabezani nesimo sangempela noma uma ibhethri inezinkinga ezithile phakathi nokusetshenziswa, izoba nomthelela empilweni yayo yangempela kanye nomsebenzi wangempela.
1. Imali engaphezulu
Ngaphansi kokusetshenziswa okuvamile, inani lemijikelezo yokushaja yeibhethri ye-lithium iron phosphatekufanele kube izikhathi ezingu-8-12, ngaphandle kwalokho kuzodala ukushajwa ngokweqile.Ukushaja ngokweqile kuzobangela ukuthi okusebenzayo kweseli kudliwe kunqubo yokukhipha futhi kuhluleke.Impilo yesevisi iyehla njengoba umthamo webhethri uncipha kancane kancane.Ngesikhathi esifanayo, ukujula kokushaja okuphezulu kakhulu kuzoholela ekukhuleni kwe-polarization, kukhuphule izinga lokubola kwebhethri futhi kufinyeze impilo yebhethri;ukushaja ngokweqile kuzoholela ekuboleni kwe-electrolyte futhi kwandise ukugqwala kwesistimu ye-electrochemical yangaphakathi yebhethri.Ngakho-ke, ukujula kokushaja kufanele kulawulwe ngesikhathi sokusebenzisa ibhethri ukugwema ukushajwa ngokweqile.
2. Iseli yebhethri yonakele
Ibhethri ye-lithium iron phosphateekusetshenzisweni kwangempela kuzophinde kuthinteke imvelo yangaphandle.Isibonelo, ngomthelela noma izici zomuntu, njenge-short-circuit noma ukubola kwamandla ngaphakathi komgogodla;core in the ukushaja kanye nokukhipha inqubo by voltage yangaphandle, izinga lokushisa, okuholela umonakalo isakhiwo sangaphakathi, ukuguguleka impahla yangaphakathi, njllEnqubweni yokusebenzisa amandla okukhipha ibhethri into ebolile idinga ukushajwa ngesikhathi, lapho kungavunyelwe ukushaja kufanele kukhishwe kuqala ngemuva kokushaja;iseli ohlelweni lokushaja nokukhipha okungavamile kufanele liyeke ukushaja noma lishintshe iseli ngesikhathi eside ngaphandle kokusebenzisa noma ukushaja ngokushesha kakhulu kuzodala ukwakheka kwangaphakathi kokonakala kwebhethri futhi kuholele ekulahlekeni kwamanzi eseli.Ukwengeza, udinga ukunaka ikhwalithi yamaseli ebhethri nezinkinga zokuphepha nezinye izici empilweni yebhethri nomsebenzi.
3. Ukuphila kweyunithi yebhethri enganele
Izinga lokushisa eliphansi le-monomer lizoholela empilweni emfushane yeseli, ngokuvamile, i-monomer ekusetshenzisweni kwezinga lokushisa lenqubo ayikwazi ukuba ngaphansi kuka-100 ℃, uma izinga lokushisa lingaphansi kuka-100 ℃ kuzoholela ekudlulisweni kwama-electron ngaphakathi iseli kusuka ku-cathode kuya ku-anode, okuholela ekutheni ama-electron ebhethri angakwazi ukunxeshezelwa ngokuphumelelayo, okuholela ekwandeni komthamo weseli, okuholela ekuhlulekeni kwebhethri (ukunciphisa ukuminyana kwamandla).Izinguquko kumingcele yesakhiwo se-monomer zizophinde zibangele ukumelana kwangaphakathi, izinguquko zevolumu kanye nokushintsha kwamandla kagesi, njll. kuthinta impilo yomjikelezo webhethri, amabhethri amaningi e-lithium iron phosphate okwamanje asetshenziswa emkhakheni wokugcinwa kwamandla ibhethri eyinhloko, ibhethri yesibili. noma amasistimu amabhethri amathathu asetshenziswa ndawonye.Impilo yesistimu yebhethri yesibili ifushane futhi izikhathi zomjikelezo zincane (ngokuvamile izikhathi ezi-1 kuye kwezingu-2) ngemva kwesidingo sokushintsha, okuzokhuphula ibhethri ngokwalo izindleko zokusebenzisa kanye nezinkinga zokungcoliswa kwesibili (ukwehla kwezinga lokushisa ngaphakathi kweseli kuzokhulula amandla engeziwe futhi ukwehla kwamandla ebhethri) amathuba;impilo yesistimu yebhethri eyodwa yinde futhi izikhathi zomjikelezo ziningi (kufika ezikhathini ezingamashumi ezinkulungwane) ngemva kwenzuzo yezindleko (uma kuqhathaniswa namabhethri e-lithium e-ternary) (anokuminyana kwamandla aphezulu).Impilo yesevisi emifushane kanye nemijikelezo emincane phakathi kweseli eyodwa izoba nokwehla okukhulu kokuminyana kwamandla (lokhu kungenxa yokumelana okuphansi kwangaphakathi kweseli eyodwa) ukuletha ukumelana okuphezulu kwangaphakathi kwebhethri;impilo yesevisi ende kanye nemijikelezo eminingi phakathi kweseli eyodwa kuzodala ukumelana okuphezulu kwangaphakathi kwebhethri futhi kunciphise amandla ayo (lokhu kungenxa yesifunda esifushane sangaphakathi sebhethri) ukuze kubangele ukwehla kwamandla.
4. Izinga lokushisa le-ambient liphezulu kakhulu futhi liphansi kakhulu, lizophinde libe nomthelela empilweni yebhethri.
Amabhethri e-lithium-ion awanawo umthelela ku-conductivity yama-ion e-lithium ebangeni lokushisa elisebenzayo, kodwa uma izinga lokushisa le-ambient liphezulu kakhulu noma liphansi kakhulu, ukuminyana kokushaja okungaphezulu kwama-ion e-lithium kuyehla.Njengoba ukuminyana kokushaja kuncipha kuzoholela kuma-ion e-lithium endaweni engaphansi kwe-electrode eyinegethivu yokushumeka nokukhipha.Uma isikhathi sokuphuma siqhubeka, maningi amathuba okuthi ibhethri lizoshajwa kakhulu noma likhishwe ngokweqile.Ngakho-ke, ibhethri kufanele libe nendawo enhle yokugcina kanye nezimo zokushaja ezifanele.Ngokuvamile, izinga lokushisa le-ambient kufanele lilawulwe phakathi kuka-25℃~35℃ lingeqi ku-35℃;umthamo wokushaja akufanele ube ngaphansi kuka-10 A/V;ungadluli amahora angama-20;icala ngalinye kufanele likhishwe izikhathi ezi-5 ~ 10;umthamo osele akufanele udlule u-20% womthamo olinganisiwe ngemuva kokusetshenziswa;ungagcini izinga lokushisa elingaphansi kuka-5 ℃ isikhathi eside ngemva kokushaja;isethi yebhethri akufanele ifinyezwe noma ishiswe ngesikhathi sokushaja nokukhipha Iphakethe lebhethri akufanele libe lifushane noma lishiswe ngesikhathi ishaja futhi ishajwa.
5. Ukusebenza kabi kweseli yebhethri kubangela isikhathi sokuphila esiphansi kanye nokusetshenziswa kwamandla amancane ngaphakathi kweseli yebhethri.
Ekukhetheni impahla ye-cathode, umehluko ekusebenzeni kwe-cathode material kubangela izinga elihlukile lokusebenzisa amandla ebhethri.Ngokuvamile, isikhathi eside sokuphila kwebhethri, ukuphakama kwesilinganiso samandla wento ye-cathode kanye nomthamo wesilinganiso samandla we-monomer, kulapho izinga lokusebenzisa amandla liphezulu ngaphakathi kwebhethri.Kodwa-ke, ngokuthuthukiswa kwe-electrolyte, okuqukethwe okungeziwe kuyakhuphuka, njll., ukuminyana kwamandla kuphezulu futhi ukuminyana kwamandla we-monomer kuphansi, okuzoba nomthelela ekusebenzeni kokubalulekile kwe-cathode yebhethri.Ukuphakama kokuqukethwe kwezakhi ze-nickel ne-cobalt ku-cathode material, kuyanda amathuba okwenza ama-oxide amaningi ku-cathode;kuyilapho amathuba okwenza ama-oxide ku-cathode mancane.Ngenxa yalesi simo, izinto ze-cathode zinokuphikiswa okuphezulu kwangaphakathi kanye nezinga lokukhulisa ivolumu ngokushesha, njll.
Isikhathi sokuthumela: Nov-08-2022