I-electrode enhle yeamabhethri e-lithium-ioni-lithium iron phosphate material, enezinzuzo ezinhle ekusebenzeni kokuphepha nokuphila komjikelezo.Lezi ezinye zezinkomba zezobuchwepheshe ezibaluleke kakhulu zebhethri lamandla.Ibhethri ye-Lifepo4 ene-1C yokushaja kanye nempilo yomjikelezo wokushaja ingafinyelelwa izikhathi ezingu-2000, ukubhoboza akuqhumi, akulula ukuvutha nokuqhuma uma kushajwe ngokweqile.Izinto ze-lithium iron phosphate cathode zenza amabhethri e-lithium-ion amakhulu abe lula ukuwasebenzisa ochungechungeni.
I-Lithium iron phosphate njenge-cathode material
Ibhethri ye-Lifepo4 ibhekisela ebhethri ye-lithium-ion esebenzisa i-lithium iron phosphate njengento esebenza kahle ye-electrode.Izinto ze-electrode ezinhle zamabhethri e-lithium-ion ikakhulukazi zifaka i-lithium cobaltate, i-lithium manganate, i-lithium nicklate, izinto ze-ternary, i-lithium iron phosphate, nokunye okunjalo.Phakathi kwazo, i-lithium cobaltate iyinto enhle ye-electrode esetshenziswa kumabhethri amaningi e-lithium-ion.Eqinisweni, i-lithium iron phosphate nayo iyinqubo yokushumeka kanye ne-deintercalation.Lesi simiso siyefana ne-lithium cobaltate ne-lithium manganenate.
izinzuzo zebhethri le-lifepo4
1. Ukushaja okuphezulu nokusebenza kahle kokukhipha
Ibhethri ye-Lifepo4 ibhethri lesibili le-lithium-ion.Inhloso eyodwa eyinhloko ngamabhethri kagesi.Inezinzuzo ezinhle ngaphezu kwamabhethri e-NI-MH ne-Ni-Cd.Ibhethri ye-Lifepo4 inokushajwa okuphezulu futhi ikhipha ukusebenza kahle, futhi ukushaja nokusebenza kahle kokukhipha kungafinyelela ngaphezu kwama-90% ngaphansi kwesimo sokuchithwa, kuyilapho ibhethri le-asidi yomthofu cishe lingama-80%.
2. ukusebenza kwebhethri ye-lifepo4 ephezulu
I-PO bond ku-lithium iron phosphate crystal izinzile futhi inzima ukubola, futhi ayiwi noma ukushisa njenge-lithium cobaltate noma yakha into eqinile ye-oxidizing ngisho nasezingeni eliphezulu lokushisa noma i-overcharge, futhi ngaleyo ndlela inokuphepha okuhle.ekusebenzeni kwangempela. , ingxenye encane yesampula itholwe inesimo esivuthayo ekuhlolweni kwe-acupuncture noma i-short-circuit, kodwa kwakungekho mcimbi wokuqhuma.Ocwaningweni lokushajwa kwe-overcharge, kwasetshenziswa amandla kagesi aphezulu aphindwe izikhathi ezimbalwa kune-voltage yokuzikhipha, futhi kwatholakala ukuthi kwakusenento yokuqhuma.Noma kunjalo, ukuphepha kwayo kokushajwa ngokweqile kuye kwathuthukiswa kakhulu uma kuqhathaniswa nebhethri elivamile le-electrolyte lithium cobalt oxide.
3. Impilo yomjikelezo omude webhethri le-Lifepo4
Ibhethri ye-Lifepo4 ibhekisela ebhethri ye-lithium-ion esebenzisa i-lithium iron phosphate njengento esebenza kahle ye-electrode.Ibhethri yempilo ende ye-lead-acid inokuphila komjikelezo izikhathi ezingaba ngu-300, futhi eliphakeme kakhulu izikhathi ezingu-500.Ibhethri lamandla e-lithium iron phosphate linempilo yomjikelezo izikhathi ezingaphezu kuka-2000, futhi inkokhiso evamile (isilinganiso samahora angu-5) ingasetshenziswa izikhathi ezifika ku-2000.Ibhethri ye-lead-acid yekhwalithi efanayo "iwuhhafu wonyaka omusha, isigamu sonyaka, ukugcinwa nokunakekelwa kwesigamu sonyaka", kuze kufike eminyakeni engu-1 ~ 1.5, futhi ibhethri ye-lifepo4 isetshenziswa ngaphansi kwezimo ezifanayo, impilo yethiyori iminyaka engu-7-8.Uma kucatshangelwa kabanzi, isilinganiso senani lokusebenza ngokomqondo singaphezu kokuphindwe kane kunesamabhethri e-lead-acid.Ukukhishwa okuphezulu kwamanje kungashajwa ngokushesha futhi kukhishwe nge-2C yamanje ephezulu.Ngaphansi kweshaja ekhethekile, ibhethri lingashajwa ngokugcwele phakathi kwemizuzu engu-1.5 yokushajwa okungu-1.5C, futhi isimanjemanje esiqalayo singafinyelela ku-2C, kodwa ibhethri le-asidi yomthofu alinakho ukusebenza okunjalo.
4. Ukusebenza kahle kwezinga lokushisa
Izinga lokushisa eliphakeme le-lithium iron phosphate lingafinyelela ku-350 ° C -500 ° C kuyilapho i-lithium manganate ne-lithium cobaltate izungeze kuphela u-200 ° C. Ububanzi bokushisa obubanzi bokusebenza (-20C–+75C), obunokumelana nezinga lokushisa eliphezulu, i-lithium iron phosphate isiqongo sokushisisa ngogesi singafinyelela ku-350 °C-500 °C, kuyilapho i-lithium manganate ne-lithium cobalt oxide kuphela ku-200 °C.
5. Ibhethri ye-Lifepo4 Umthamo ophezulu
Inomthamo omkhulu kunamabhethri ajwayelekile (i-lead-acid, njll.).Umthamo we-monomer ngu-5AH-1000AH.
6. Awukho umphumela wenkumbulo
Amabhethri aphinde ashajwe asebenza ngaphansi kwezimo ezivame ukungashajwa ngokugcwele, futhi umthamo uzokwehla ngokushesha ngaphansi komthamo olinganisiwe.Lesi simo sibizwa ngokuthi umphumela wenkumbulo.Inkumbulo efana ne-nickel-metal hydride namabhethri e-nickel-cadmium, kodwa ibhethri le-lifepo4 alinayo le nto, kungakhathaliseki ukuthi ibhethri likusiphi isimo, ingasetshenziswa ngokushajwa, asikho isidingo sokuyikhipha kanye nokushajwa kabusha.7.Ibhethri ye-lifepo4 engasindi
Ibhethri le-lifepo4 lomthamo ofanayo wokucaciswa ngu-2/3 wevolumu yebhethri le-asidi yomthofu, futhi isisindo singu-1/3 webhethri le-asidi yomthofu.
8. Amabhethri e-Lifepo4ziyayiphatha kahle imvelo
Ibhethri ngokuvamile libhekwa njengelingenazo izinsimbi ezisindayo nezinsimbi ezingavamile (amabhethri e-Ni-MH adinga izinsimbi ezingavamile), okungezona ubuthi (okuqinisekisiwe kwe-SGS), okungangcolisi, ngokuhambisana nemithetho ye-European RoHS, yisitifiketi sebhethri esiluhlaza ngokuphelele. .Ngakho-ke, isizathu sokuthi kungani amabhethri e-lithium ethandwa yimboni ikakhulukazi ukucatshangelwa kwemvelo.Ngakho-ke, ibhethri lifakiwe ohlelweni lwezwe lokuthuthukiswa kobuchwepheshe obuphezulu "863" phakathi nesikhathi "soHlelo Lweminyaka Eyishumi Yeminyaka Emihlanu" futhi seliphenduke iphrojekthi kazwelonke yokweseka nokukhuthazwa okuyinhloko.Ngokungena kweChina ku-WTO, umthamo wokuthekelisa wamabhayisikili kagesi e-China uzokhula ngokushesha, futhi amabhayisikili kagesi angena e-Europe nase-United States kudingeke ukuthi afakwe amabhethri angangcolisi.Ukusebenza kwebhethri ye-lithium-ion kuncike kakhulu ezintweni ezinhle nezimbi.I-Lithium iron phosphate yinto yebhethri ye-lithium ebonakale eminyakeni yamuva nje.Ukusebenza kwayo kokuphepha nempilo yomjikelezo ayinakuqhathaniswa nezinye izinto.Izinkomba zobuchwepheshe ezibaluleke kakhulu zebhethri.Ibhethri le-Lifepo4 linobuhle bokungafaki ubuthi, okungangcolisi, ukusebenza kahle kokuphepha, inhlobonhlobo yezinto zokusetshenziswa, amanani aphansi, nempilo ende.Kuyinto ekahle cathode impahla isizukulwane esishaamabhethri e-lithium-ion.