Ukushaja ibhethri le-lithium elizikhiphayo elizikhiphayo kanye nendlela yokulinganisa

著者：Iflowpower – Olupese Ibusọ Agbara to ṣee gbe

Leli phepha lichaza imiphumela yezinto ezinhle ze-electrode, izinto ezingezinhle ze-electrode, ama-electrolyte, nezindawo zokugcina ngesilinganiso sokuzikhipha kwamabhethri e-lithium ion. Ngesikhathi esifanayo, yethula indlela yokulinganisa yebhethri ye-lithium-ion evame ukusetshenziswa esetshenziswa manje kanye nendlela yokulinganisa ngokushesha yezinga lokuzikhipha. Kusuka kunjiniyela we-Guoxuan high-tech, wamukele wonke umuntu ukwabelana! Ukusabela kokuzikhipha kwebhethri le-lithium-ion akuvimbeki, kodwa akukhona nje kuphela ukuncishiswa kwebhethri ngokwalo, kodwa futhi kuthinta kakhulu ibhethri noma impilo yomjikelezo.

Isilinganiso sokuzikhipha kwebhethri le-lithium-ion ngokuvamile singu-2% kuya ku-5% ngenyanga, futhi singahlangabezana ngokugcwele nezidingo zebhethri le-monomer. Kodwa-ke, uma ibhethri ye-lithium ion ye-monomer isiqoqwe kumojula, ngenxa yezimpawu zebhethri le-lithium ion le-monomer ngayinye, i-voltage yokugcina yebhethri ye-lithium ion ngayinye ayikwazi ukuhambisana ngokuphelele ngemva kokushajwa nokukhipha ngakunye, ukuze kuvele Ibhethri le-monomer kumojuli yebhethri ye-lithium-ion, ukusebenza kwebhethri le-lithium ion le-monomer kuzowohloka. Njengoba inani lokushaja nokukhishwayo kwenyukile, izinga lokuwohloka lizokhula nakakhulu, futhi impilo yomjikelezo yehle kakhulu kunebhethri le-monomer elingabhangqiwe.

Ngakho-ke, ucwaningo olujulile ngezinga lokuzikhipha kwebhethri ye-lithium ion yisidingo esiphuthumayo sokukhiqizwa kwebhethri. Okokuqala, ukuzikhipha ngokwakho kwesici sokuzikhipha kwebhethri okuyisici esizikhiphayo kubhekisela esimweni sokulahlekelwa uma ibhethri lishintshana, futhi kwaziwa nangokuthi umthamo ongashajwa. Ukuzikhipha ngokwakho ngokuvamile kungahlukaniswa ngezinhlobo ezimbili: ukuzikhipha okubuyisela emuva kanye nokuzikhipha ngokwakho okungahlehliseki.

Umthamo wokulahlekelwa ungabuyiselwa emuva ukuze kunxeshezelwe ukuzikhipha ngokwakho okubuyisela emuva, futhi isimiso sifana nokusabela okuvamile kokukhipha kwebhethri. Umthamo wokulahlekelwa awukwazi ukuthola isinxephezelo sokuzikhiphela ngokwakho ekuzikhipheni ngokwakho okungabuyiseleki emuva, futhi isizathu esibalulekile sokuthi ingaphakathi lebhethri lenzeke liguquliwe, okuhlanganisa i-electrode ephozithivu nokusabela kwe-electrolyte, isisombululo se-electrolytic electrolytic, ukusabela okubangelwa i-electrolyte autobiosis, futhi lapho kukhiqizwa Ukusabela okungenakuhlehliswa okubangelwa amasekhethi amancane amafushane abangelwa ukungcola. Izici ezinomthelela wokuzikhulula zichazwe ngezansi.

1 Umthelela wempahla ye-electrode ekhangayo ibalulekile ukuthi insimbi eguquguqukayo ye-electrode ekhangayo kanye nokungcola kukhishwa isikhashana ngaphakathi kwemvula ye-electrode eyinegethivu, ngaleyo ndlela isanda kukhishwa kubhethri ye-lithium-ion. Yah-Meiteng et al. Ufunde izakhiwo zomzimba neze-electrochemical zezinto ezimbili ezinhle ze-LIFEPO4.

Ucwaningo lwathola ukuthi izinga lokuzikhipha kokuqukethwe kokungcola kwensimbi ezintweni zokusetshenziswa kanye nenqubo yokushaja nokukhipha kwakuphezulu, isizathu sasiwukuthi insimbi yancishiswa kancane kancane yi-electrode engalungile, ibhoboza i-diaphragm, okuholela ekujikelezeni okufushane ebhethri, ngaleyo ndlela kubangele ukuzikhipha okuphezulu. 2 Umphumela wezinto ezingezinhle ze-electrode ekuzikhipheni ngokwakho ubalulekile ngenxa yokusabela okungenakuhlehliswa kwezinto ezingezinhle ze-electrode kanye ne-electrolyte. Kusukela ngo-2003, u-Aurbach et al.

Kuphakanyiswe ukuthi i-electrolyte ibuyiselwe futhi ikhishwe igesi, ukuze ubuso bengxenye yegraphite buvezwe ku-electrolyte. Phakathi nenqubo yokushaja nokukhipha, i-lithium ion ingokwemvelo, isakhiwo se-graphite layered sibhujiswa kalula, okuholela ekulinganiseni okukhulu kokuzikhipha. 3 Umthelela we-electrolyte yesisombululo se-electrolyte: ukugqwala kwe-electrolyte noma ukungcola ebusweni be-electrode engalungile; izinto ze-electrode zincibilika ku-electrolyte; i-electrode ichithwa yisisombululo se-electrolytic sichithwa yi-insoluble solid noma igesi ukuze kwakhiwe isendlalelo se-passivation, njll.

Njengamanje, inani elikhulu labasebenzi bocwaningo lizibophezele ekuthuthukiseni izithasiselo ezintsha zokuvimbela imiphumela ye-electrolyte ekuzikhipheni. Junliu et al. Isengezo sebhethri ye-MCN111 ye-electrolyte yokwengeza izithasiselo, sithole ukuthi ukusebenza komjikelezo webhethri lokushisa okuphezulu kuyathuthukiswa, nezinga lokuzikhipha ngokwalo ngokuvamile liyehliswa.

Isizathu siwukuthi lezi zithasiselo zingathuthukisa ulwelwesi lwe-SEI ukuvikela i-electrode engemihle yebhethri. 4 Isimo sokulondoloza Izinga lesitoreji Izinto ezivamile ezinomthelela izinga lokushisa lokulondoloza kanye ne-SOC yebhethri. Ngokuvamile, uma izinga lokushisa liphezulu, i-SOC iphakama, ibhethri lizikhipha ngokwalo.

UTAKASHI et al. Ukuhlolwa okunamandla kumabhethri e-ion phosphate ngaphansi kwezimo zokusetha kabusha. Imiphumela ibonisa ukuthi isilinganiso sokugcinwa kwamandla siyancipha kancane kancane ngesikhathi seshalofu, futhi ibhethri liyakhushulwa.

U-Liu Yunjian nabanye basebenzisa ibhethri ye-lithium manganethi esebenza ngamandla e-lithium. Ithole ukuthi amandla ahlobene we-electrode eqondile aya ngokuya ekhuphuka. Amandla ahlobene we-electrode engalungile aya ngokuya Aphansi, impahla yawo yokunciphisa nayo iya iba namandla, zombili zingasheshisa imvula ye-MN, okuholela ekwenyukeni kwezinga lokuzikhulula.

5 Ezinye izici zithinta izici zezinga lokuzikhipha kwebhethri ngokwalo, ngaphandle kwezimbalwa ezichazwe ngenhla, kukhona futhi izici ezilandelayo: Enqubweni yokukhiqiza, ama-burrs okwenzeka lapho isigxobo sisika, kanye nendawo yokukhiqiza yethulwa ebhethrini. Ukungcola, njengothuli, impushana yensimbi epuletini, njll., lokhu kungase kubangele isekethe yangaphakathi yebhethri emfushane encane; kukhona isekethe ye-elekthronikhi yangaphandle lapho imvelo yangaphandle imanzi, ukuvala umugqa wangaphandle akuphelele, ikesi yebhethri impofu, okuholela kumjikelezo we-electronic wangaphandle, okuholela ekuzikhipheni; ngesikhathi sokugcina isikhathi eside, izinto ezisebenzayo ze-electrode material kanye nokubopha komqoqi wamanje, okuholela ekunciphiseni komthamo, futhi ukwanda kokuzikhipha.

Into ngayinye kulezi ezingenhla noma inhlanganisela yezinto eziningi ingabangela ukuziphatha kokuzikhipha kwebhethri le-lithium-ion, okunzima ukuthola nokulinganisa ukusebenza kwesitoreji sebhethri. Okwesibili, indlela yokulinganisa ye-self-discharge ratio ingabonwa ngokuhlaziywa okungenhla, njengoba izinga lokuzikhipha kwebhethri ye-lithium ion ngokuvamile liphansi. Izinga lokuzikhipha ngokwalo lithinteka izinga lokushisa, ukusetshenziswa kwemijikelezo kanye ne-SOC, ngakho-ke ukulinganisa okunembile kokuzikhipha kwebhethri kunzima kakhulu futhi kudla isikhathi.

1 Izinga lokuzikhipha ngokwakho Indlela Yokulinganisa Yendabuko Njengamanje, indlela evamile yokuhlonza ukuzikhipha ngokwayo inezinhlobo ezintathu ezilandelayo: Ukuzikhipha ukuze kutholwe ukulahleka komthamo webhethri. Izinga lokuzikhipha ngokwakho yileli: ngesimo: c amandla alinganiselwe ebhethri; I-C1 umthamo wokukhipha. Ngemva kokufakwa kokuvula, umthamo oyinsalela webhethri ungatholwa ibhethri.

Ngalesi sikhathi, iseli yebhethri iphinde ishajwe futhi iphinde ikhiphe ukusebenza komjikelezo, inqume umthamo ogcwele wegalikhi kagesi ngalesi sikhathi. Le ndlela inganquma ukuthi ibhethri alihlehliseki ekulahlekelweni kwamandla kanye nokulahlekelwa amandla okubuyiseleka emuva. ● Isilinganiso sokunciphisa amandla kagesi wesifunda esivulekile Indlela yokulinganisa I-voltage yesekethe evulekile kanye nesimo sokushajwa kwebhethri i-SOC inobudlelwane obuqondile, inqobo nje uma ikala izinga lokushintsha kwe-OCV yebhethri esikhathini esithile, okungukuthi, indlela ilula, imane irekhode i-voltage yebhethri nganoma yisiphi isikhathi.

Ngaphezu kwalokho, ngokusho kokuxhumana phakathi kwe-voltage ne-SOC yebhethri, isimo sokushajwa kwebhethri singatholakala. Izinga lokuzikhulula kwebhethri lingatholwa ngokubala kokuncishiswa kwe-voltage attenuation kanye nokubalwa kwamandla okunciphisa ahambisana nesikhathi seyunithi. ● Indlela yokubamba umthamo Ikala ugesi wokuvula ofunwa ibhethri noma amandla adingekayo ukuze yonge, okubangelwa izinga lokuzikhipha ngokwalo kwebhethri.

Okusho ukuthi, amandla okushaja lapho ukujikeleza kwebhethri okuvuliwe kukalwa, futhi izinga lokuzikhipha kwebhethri lingabhekwa njengomthamo wokushaja olinganiselwe. 2 Indlela Yokukala Esheshayo Isilinganiso Sokuzikhipha Ngokwakho Ngenxa yesikhathi eside esidingekayo endleleni yokulinganisa evamile, izinga lokuzikhipha ngokwakho liyindlela yokuhlunga ibhethri kunqubo yokuthola ibhethri ngenxa yesikhathi eside esidingekayo endleleni yokulinganisa evamile. Ukuvela kwenani elikhulu lezindlela zokulinganisa ezintsha nezilula, ukonga isikhathi esiningi namandla ezilinganisweni zokuzikhipha kwebhethri.

● Ubuchwepheshe bokulawula idijithali Ubuchwepheshe bokulawula idijithali buyindlela entsha yokulinganisa ukuzikhipha ngokwakho yendlela yokulinganisa yokuzikhipha ngokwakho esuselwe ezindleleni ezivamile zokulinganisa ukuzikhipha. Le ndlela inezinzuzo zokunemba okufushane, okuphezulu, ukunemba okuphezulu, imishini elula. ● Indlela yesekethe elinganayo yesekethe iyindlela entsha yokulinganisa ukuzikhipha, elingisa ibhethri kumjikelezo olinganayo, ongakala ngokushesha nangempumelelo izinga lokuzikhipha ngokwakho lamabhethri e-lithium-ion.

Okwesithathu, ukulinganisa incazelo yesilinganiso sokuzikhulula Njengenkomba yokusebenza ebalulekile yebhethri ye-lithium ion, inomthelela obalulekile ekuhlolweni nasekugcwalisweni kwebhethri, ngakho-ke izinga lokuzihlukanisa lamabhethri e-lithium-ion linokubaluleka okufinyelele kude. 1 Qagela inkinga ye-bobbin efanayo ku-bob efanayo, izinto ezisetshenziswayo, izinto ezisetshenziswayo kanye nokulawulwa kokukhiqiza kuyafana ngokuyisisekelo. Uma ibhethri ngalinye likhulu ngokusobala, isizathu mhlawumbe singenxa yokungcola kanye ne-diaphragm ebhobozayo.

I-Micro short circuit. Ngoba umthelela we-micro-short ebhethrini uhamba kancane futhi awubuyiseleki emuva. Ngakho-ke, ukusebenza kwamabhethri anjalo akuhlukani kakhulu namabhethri avamile ngesikhathi esifushane, kodwa ngokujula kancane kancane kokusabela okungenakuhlehliswa kwangaphakathi, ukusebenza kwebhethri kuzoba ngaphansi kakhulu kunokusebenza kwefekthri nokunye ukusebenza kwebhethri okuvamile.

Ngakho-ke, ukuze kuqinisekiswe ikhwalithi yebhethri yefekthri, ibhethri elizikhiphayo kufanele likhishwe. 2 Ukuhlanganisa ibhethri ukuze iqoqe amabhethri e-lithium ion ukuze abe nokuvumelana okungcono, okuhlanganisa umthamo, i-voltage, ukumelana kwangaphakathi, nezinga lokuphuma elimhlophe, njll. Umthelela wesilinganiso sokuzikhipha kwebhethri ephaketheni lebhethri uwukubonakaliswa okubalulekile.

Uma isihlanganiswe ibe module, ngenxa yokuzithiba kwebhethri ye-lithium ion ngayinye ye-monomer, i-voltage izokwehla ngamadigri ahlukene, ochungechungeni ngesikhathi seshelufu noma umjikelezo Ngaphansi kokushaja, okwamanje iyalingana, ngakho-ke ingase ikhokhiswe ngokweqile noma ingagcwaliswa kumojula yebhethri ye-lithium-ion ngemva kokushaja, futhi ukusebenza kuzowohloka kancane kancane ngenani lokushaja nokukhipha. Impilo ejikelezayo uma iqhathaniswa namabhethri e-monomer angabhanqiwe. Ngakho-ke, iphakethe lebhethri lidinga ukulinganisa okunembile kanye nokuhlolwa kokuzithiba kwamabhethri e-lithium ion.

3 Isilinganiso sebhethri SOC Ukulungisa umthwalo kuphinde kubizwe ngokuthi amandla asele, amele isilinganiso sebhethri elisetshenziswe isikhathi esithile noma isikhathi eside liphethe umthamo osele kanye nesimo salo sokushajwa ngokugcwele, esivame ukusetshenziswa. Izinga lokuzikhiphela ngokwakho mayelana nesilinganiso se-SOC samabhethri e-lithium ion sinenani elibalulekile lesithenjwa. Ngemuva kwamandla azikhiphayo, ukulungiswa kwevelu yokuqala ye-SOC kungathuthukisa ukunemba kwesilinganiso se-SOC.

Ngakolunye uhlangothi, ikhasimende lingalinganisa isikhathi noma ibanga lokuhamba lomkhiqizo ngokwamandla asele; ngakolunye uhlangothi, ukunemba kokubikezela kwe-SOC kwe-BMS kungavimbela ngempumelelo ukushajwa kwebhethri okweqile kwe-Overlant, kunwebe impilo yebhethri. .