Amabhethri e-Lithium-Ion Ezimotweni Zikagesi
Ukuthuthukiswa kwezimoto zikagesi (ama-EV) eminyakeni eyishumi edlule kuxhunywe ngokungenakuhlukaniswa nesici esisodwa esibalulekile: ibhethri. Phakathi kobuchwepheshe obuhlukahlukene bokugcina amandla obuke bathuthukiswa, amabhethri e-lithium-ion (i-Li-ion) abe yisinqumo esivelele sezimoto zikagesi, izithuthuthu zikagesi, amabhasi kagesi, kanye namadivayisi ahlukahlukene asekela uhlelo lwe-EV. Lokhu akuyona nje "indlela yokuthambekela," kodwa ngoba i-Li-ion inikeza inhlanganisela engenakuqhathaniswa: ukuminyana kwamandla aphezulu, ukusebenza kahle okuhle, isisindo esincane, kanye nekhono lokuphinda ushaje ngokuphindaphindiwe ngokuwohloka okulawulwayo.
Kungani i-Lithium-Ion Iba Yindinganiso Kuma-EV?
Izimoto zikagesi zidinga umthombo wamandla ongagcina ugesi omningi ngenkathi uhlala uqinile. Uma kuqhathaniswa namabhethri e-lead-acid ayesetshenziswa kakhulu ngaphambilini, amabhethri e-Li-ion anomthamo wamandla ophezulu kakhulu. Lokhu kusho ukuthi ngenani elifanayo lamandla, amabhethri e-Li-ion angaba mancane futhi alula—izici ezimbili ezithinta kakhulu ibanga lemoto, ukusebenza kwesivinini, kanye nokusebenza kahle kwayo yonke indawo.
Ngaphezu kwalokho, amabhethri e-Li-ion anekhono eliphezulu lokushaja nokukhipha ishaja. Amabhethri amaningi e-EV anamuhla angafeza ukusebenza kahle kakhulu kokuya nokubuya, okuvumela amandla amaningi avela kushaja ukuthi anikeze amandla amasondo. Lokhu kuholela ezindleleni zokusebenza eziphansi kanye nokusetshenziswa kwamandla okuphumelelayo.
Isakhiwo Esiyisisekelo kanye Nendlela Amabhethri e-Li-ion Asebenza Ngayo
Amabhethri e-lithium-ion asebenza ngokuhambisa ama-ion e-lithium phakathi kwama-electrode amabili: i-anode kanye ne-cathode. Lapho ibhethri liphuma, ama-ion e-lithium ahamba esuka ku-anode aye ku-cathode nge-electrolyte, kuyilapho ama-electron egeleza ngesekethe yangaphandle ukuze anike amandla injini kagesi. Lapho ishaja, inqubo iyaguqulwa: ama-ion e-lithium aphoqelelwa ukubuyela ku-anode.
Kumongo we-EV, ibhethri alikho njengeseli elilodwa. Lakhiwe ngamaseli amaningi ahlanganiswe abe amamojula, abese ehlanganiswa abe yiphakethe. Ukuxhumeka kochungechunge kwandisa i-voltage, kuyilapho ukuxhumeka okuhambisanayo kwandisa umthamo (Ah) kanye nomthamo wamanje. Ezingeni lephakethe, amabhethri afakwe izinhlelo zokuphepha, ukupholisa, izinzwa, kanye nekhompyutha yokuphatha ukuqinisekisa ukusebenza nokuphepha.
Izinhlobo Zekhemistri Ezivamile Ze-Lithium-Ion Ezimotweni Zikagesi
Igama elithi “lithium-ion” empeleni liyigama elibanzi elihlanganisa ukuhlukahluka okuningi kwamakhemikhali. Kuma-EV, amanye avame kakhulu yile:
1. I-NMC (i-Nickel Manganese Cobalt)
Isetshenziswa kabanzi ngoba inikeza ibhalansi enhle phakathi kokuminyana kwamandla, isikhathi sokuphila, kanye nokusebenza. Okuqukethwe kwe-nickel kuvame ukwandisa ukuminyana kwamandla, kuyilapho i-manganese inegalelo ekuzinzeni. I-Cobalt isekela ukusebenza kanye nokuzinza, kodwa ivame ukuba sendaweni evelele ngenxa yezinkinga zezindleko kanye nochungechunge lokuhlinzekwa.
2. I-NCA (i-Nickel Cobalt Aluminium)
Yaziwa ngamandla ayo aphezulu futhi isetshenziswa kabanzi ezimotweni ezibeka phambili ububanzi, inselele isidingo sezinhlelo ezinhle kakhulu zokulawula ukushisa kanye nokuphatha.
3. I-LFP (i-Lithium Iron Phosphate)
Ithola ukuthandwa ngenxa yokuqina kwayo okuphezulu kokushisa, impilo yomjikelezo omude, kanye nokusebenza okuphephile ngokuvamile ngaphansi kwezimo ezimbi kakhulu. Inkinga ukuthi ivame ukuba namandla aphansi kune-NMC/NCA, yize ukusungulwa kwemiklamo yephakethe kunciphisa igebe.
Ukukhetha ikhemikhali yebhethri kuyisivumelwano phakathi kobubanzi, izindleko, ukuphepha, ukuqina, kanye nemakethe eqondiwe. Ama-EV asedolobheni agcizelela izindleko nokuqina avame ukusebenzisa i-LFP, kuyilapho izimoto ezihamba ibanga elide nezisebenza kahle zivame ukusebenzisa i-NMC noma i-NCA.
Iphakethe Lebhethri kanye Nendima Yohlelo Lokuphathwa Kwebhethri (i-BMS)
Iphakethe lebhethri le-EV liyisistimu eyinkimbinkimbi. Yilapho i-Battery Management System (BMS) idlala khona indima ebalulekile. I-BMS iqapha i-voltage, i-current, kanye nezinga lokushisa leseli ngalinye noma iqembu lamaseli, bese ilawula izici ezahlukahlukene ezifana nalezi:
- Ukuvikelwa ekushajeni ngokweqile, ekukhipheni ngokweqile, ekushiseni ngokweqile, nasekushiseni ngokweqile
– Ukulinganisela phakathi kwamaseli ukuze kungabikho seli eligcwele noma eliphelelwe “ngokushesha”, okungasheshisa ukuwohloka.
– Izilinganiso ze-State of Charge (SoC) kanye ne-State of Health (SoH) zinikeza abashayeli ulwazi olunembile
- Ukuxhumana nesistimu yokupholisa/yokushisa ukuze ibhethri lihlale lisezingeni elifanele lokushisa lokusebenza.
Ngaphandle kwe-BMS ethembekile, amabhethri e-Li-ion awagcini nje ngokuwohloka ngokushesha ekusebenzeni, kodwa futhi asengozini yokwehluleka.
Ukuphathwa Kokushisa: Isihluthulelo Sempilo Yebhethri Nokuphepha
Izinga lokushisa liyisici esibalulekile emhlabeni we-Li-ion. Ukushisa ngokweqile kusheshisa ukusabela kwamakhemikhali okungafuneki, kusheshisa ukuwohloka, futhi ezimweni ezimbi kakhulu kungabangela ukuqhuma kokushisa. Ngokuphambene nalokho, izinga lokushisa eliphansi kakhulu linciphisa ikhono lebhethri lokusingatha ukushaja okusheshayo futhi kunciphisa ukuphuma kwamandla.
Ngakho-ke, izimoto zikagesi zanamuhla zisebenzisa izinhlelo zokuphatha ukushisa: ukupholisa uketshezi, ukupholisa umoya, amaphampu okushisa, noma inhlanganisela yokushisa nokupholisa. Lezi zinhlelo zigcina ibhethri lingaphakathi kwebanga elifanele, ikakhulukazi ngesikhathi sokusheshisa okukhulu, ukushaja okusheshayo kwe-DC, noma ukushayela esimweni sezulu esibi kakhulu.
Ukushaja kanye nomthelela wako ekonakaleni
Okunye okukhathaza abasebenzisi be-EV ukwehla kwamandla ebhethri ngokuhamba kwesikhathi. Nakuba ukonakala kungenakugwenywa ngokuphelele, kungancishiswa ijubane. Izici ezithonya ukonakala zifaka:
– Imvamisa yokushaja okusheshayo: Ukushaja okusheshayo kwe-DC ngokuvamile kukhiqiza ukushisa okuningi kanye nokucindezeleka kwamakhemikhali kunokushaja kwe-AC okuhamba kancane.
– Umkhuba wokushaja kufike ku-100% noma ukukhipha kufike ku-0%: amabhethri avame ukuhlala isikhathi eside uma esebenza kububanzi obuthile be-SoC ekusetshenzisweni kwansuku zonke.
– Izinga lokushisa eliphakathi nendawo: ukushisa okuphezulu isikhathi eside kusheshisa ukuguga kwebhethri.
– Isitayela sokushayela kanye nomthwalo: ukusheshisa okunamandla kanye nemithwalo esindayo kwandisa amandla kagesi, kukhiqiza ukushisa, futhi kubeka ukucindezeleka okwengeziwe kumaseli.
Abakhiqizi be-EV bavame ukusebenzisa ama-capacity buffer kanye namasu e-BMS ukuvikela ibhethri, njengokunciphisa ukushaja okusebenzayo okuphezulu noma ukulungisa ijika lokushaja ukuze liphephe.
Ukuphepha Kwebhethri Le-Lithium-Ion Kuma-EV
Izinkinga zokuphepha zivame ukugqanyiswa, ikakhulukazi mayelana nomlilo webhethri. Ngokwezibalo, izimbangela zingahlukahluka: ukukhubazeka kokukhiqiza, umonakalo ongokwenyama ovela ezingozini, ukwehluleka kwesistimu yokushisa, noma ukushaja okungafanele. Ama-EV aklanywe ngezingqimba eziningi zokuvikela, okuhlanganisa:
– Ama-baffle kanye nezakhiwo zokupakisha ezinciphisa ukusabalala kokushisa phakathi kwamaseli
– Izinzwa zokushisa kanye nezamanje eziqala ukuvala ngokuzenzakalelayo lapho kutholwa into engavamile.
– Uhlelo lwe-high voltage breaker (contactors) oluhlukanisa ibhethri uma kwenzeka izimo eziyingozi
- Izindinganiso zokuhlola eziqinile zokudlidliza, izinga lokushisa, umthelela kanye nokumelana nokungena
Ngomklamo ofanele, amabhethri e-Li-ion angasebenza ngokuphephile, yize esadinga ukunamathela ezinqubweni zokulungisa nokushaja.
Ukuvuselela, Ukuphila Kwesibili, Nokuzinza
Amabhethri e-EV awalahlekelwa ukusebenza kwawo uma amandla awo ehla ngaphansi kwezindinganiso zezimoto. Amaningi asenamandla anele kwezinye izinhlelo zokusebenza, njengokugcina amandla anganyakazi (impilo yesibili) emakhaya, ezakhiweni, noma ezinhlelweni zamandla avuselelekayo. Lokhu kusiza ukwandisa impilo ewusizo yebhethri ngaphambi kokuba lidinge ukuphinde lisetshenziswe.
Ukuvuselelwa kwamabhethri e-Li-ion kuyisihloko esibalulekile ngoba siqukethe izinto ezibalulekile njenge-nickel, i-cobalt, ithusi, ne-lithium. Imboni yokuvuselela iyakhula ukuze ikhiphe lezi zinto futhi izibuyisele ochungechungeni lokuhlinzeka. Ukuqhubekela phambili, ukuthuthukisa ukusebenza kahle kokuvuselela kanye nokuklama amabhethri okuvuselela kuzoba yizici ezibalulekile ekusimeni kwesistimu ye-EV.
Ikusasa: Ukusuka Esimweni Esiqinile Kuya Kwekhemistri Ehlukile
Nakuba i-Li-ion isabusa, ucwaningo luyaqhubeka. Enye indlela enamandla yibhethri le-solid-state, elithatha indawo yama-electrolyte aqinile ngama-solid. Imigomo ihlanganisa ukuthuthukisa ukuphepha, ukuvumela ukuminyana kwamandla okuphezulu, kanye nokusheshisa isivinini sokushaja. Okwamanje, ukuthuthukiswa kwe-LFP chemistry, izinhlobo ze-nickel ephezulu, kanye nobuchwepheshe be-silicon anode nakho kuyavuthwa, okuvumela ukusebenza okuthuthukisiwe ngaphandle kokubeka izindleko nokuphepha engcupheni.
Ekugcineni, amabhethri e-lithium-ion ayinhliziyo yezimoto zikagesi zanamuhla: ayinkimbinkimbi, ayabiza, kodwa athuthuka njalo. Ngokuhlanganiswa kokusungula izinto ezintsha ngamakhemikhali, ukwakheka kwamaphakethe okusebenza kahle ngokwengeziwe, ukuphathwa kokushisa okuhlakaniphile, kanye nesistimu yokuvuselela kabusha echumayo, amabhethri e-Li-ion azohlala ewubuchwepheshe obuyinhloko obuqhuba ukushintshela ekuhambeleni okuhlanzekile nokuphumelelayo.
