Ukushaja ngokweqile kungenye yezinto ezinzima kakhulu ekuhlolweni kwamanje kokuphepha kwebhethri ye-lithium, ngakho-ke kuyadingeka ukuqonda indlela yokushaja ngokweqile kanye nezinyathelo zamanje zokuvimbela ukushajwa ngokweqile.
Isithombe 1 amajika kagesi kanye nezinga lokushisa lebhethri lesistimu ye-NCM+LMO/Gr lapho lishajwe ngokweqile.I-voltage ifinyelela ku-5.4V ephezulu, bese i-voltage yehla, ekugcineni ibangele ukubaleka okushisayo.Amajika kagesi kanye nezinga lokushisa lokushajwa ngokweqile kwebhethri le-ternary afana kakhulu nawo.
Lapho ibhethri ye-lithium ishajwe ngokweqile, izokhiqiza ukushisa negesi.Ukushisa kuhlanganisa ukushisa kwe-ohmic nokushisa okukhiqizwa ukusabela okuseceleni, lapho ukushisa kwe-ohmic okuyinhloko.Ukusabela okuseceleni kwebhethri okubangelwa ukushajwa ngokweqile okokuqala ukuthi i-lithium eyeqile ifakwa ku-electrode engalungile, futhi i-lithium dendrites izokhula ebusweni be-electrode engalungile (isilinganiso se-N/P sizothinta i-SOC yokuqala yokukhula kwe-lithium dendrite).Okwesibili ukuthi i-lithium eyengeziwe ikhishwa ku-electrode enhle, okwenza ukuba isakhiwo se-electrode enhle sidilike, sikhiphe ukushisa futhi sikhulule umoya-mpilo.I-oksijeni izosheshisa ukubola kwe-electrolyte, ukucindezela kwangaphakathi kwebhethri kuzoqhubeka nokukhuphuka, futhi i-valve yokuphepha izovuleka ngemva kwezinga elithile.Ukuthintana kwento esebenzayo nomoya kukhiqiza ukushisa okwengeziwe.
Ucwaningo luye lwabonisa ukuthi ukunciphisa inani le-electrolyte kuzonciphisa kakhulu ukushisa nokukhiqizwa kwegesi ngesikhathi sokushajwa ngokweqile.Ukwengeza, kuye kwacutshungulwa ukuthi uma ibhethri ingenayo i-splint noma i-valve yokuphepha ayikwazi ukuvulwa ngokujwayelekile ngesikhathi sokushajwa ngokweqile, ibhethri ijwayele ukuqhuma.
Ukushaja ngokweqile okuncane ngeke kubangele ukuphuma kokushisa, kodwa kuzodala ukufiphala kwamandla.Ucwaningo luthole ukuthi uma ibhethri ene-NCM/LMO hybrid material njengoba i-electrode ephozithivu ishajwa ngokweqile, akukho ukubola kwamandla okusobala lapho i-SOC ingaphansi kuka-120%, futhi amandla abola kakhulu lapho i-SOC ingaphezu kuka-130%.
Njengamanje, kunezindlela ezimbalwa zokuxazulula inkinga yokushaja ngokweqile:
1) I-voltage yokuvikela isethwe ku-BMS, ngokuvamile i-voltage yokuvikela iphansi kune-voltage ephezulu ngesikhathi sokushajwa;
2) Thuthukisa ukumelana nokushajwa ngokweqile kwebhethri ngokuguqulwa kwezinto (njengokumboza impahla);
I-3) Engeza izithasiselo zokulwa nokukhokhiswa ngokweqile, njengamapheya e-redox, ku-electrolyte;
I-4) Ngokusetshenziswa kwe-membrane ye-voltage-sensitive, lapho ibhethri likhokhiswa ngokweqile, ukumelana nolwelwesi kuncipha kakhulu, okusebenza njenge-shunt;
I-5) Imiklamo ye-OSD ne-CID isetshenziswa kumabhethri egobolondo le-aluminium yesikwele, okuyimiklamo evamile okwamanje yokulwa nokukhokhiswa ngokweqile.Ibhethri lesikhwama alikwazi ukuthola idizayini efanayo.
Izithenjwa
Izinto Zokugcina Amandla 10 (2018) 246–267
Kulokhu, sizokwethula izinguquko ze-voltage nezinga lokushisa kwebhethri ye-lithium cobalt oxide uma ishajwe ngokweqile.Isithombe esingezansi yi-voltage yokushajwa ngokweqile kanye nejika lezinga lokushisa lebhethri le-lithium cobalt oxide, futhi i-eksisi evundlile inani le-delithiation.I-electrode engeyinhle i-graphite, kanti i-electrolyte solvent yi-EC/DMC.Umthamo webhethri ngu-1.5Ah.Ukushaja kwamanje ngu-1.5A, futhi izinga lokushisa yizinga lokushisa langaphakathi lebhethri.
Zone I
1. I-voltage yebhethri ikhuphuka kancane.I-electrode ephozithivu ye-lithium cobalt oxide delithiates ngaphezu kuka-60%, futhi i-lithium yensimbi igxila ohlangothini lwe-electrode olunegethivu.
2. Ibhethri liyaqhuma, okungenzeka kungenxa ye-oxidation yokucindezela okuphezulu kwe-electrolyte ohlangothini oluhle.
3. Izinga lokushisa lizinzile ngokuyisisekelo ngokukhuphuka kancane.
Indawo II
1. Izinga lokushisa liqala ukukhuphuka kancane.
2. Ebangeni le-80 ~ 95%, i-impedance ye-electrode enhle iyanda, futhi ukumelana kwangaphakathi kwebhethri kuyanda, kodwa kwehla ngo-95%.
3. I-voltage yebhethri idlula i-5V futhi ifinyelela kwephezulu.
Indawo III
1. Cishe ku-95%, izinga lokushisa lebhethri liqala ukukhuphuka ngokushesha.
2. Kusukela cishe ku-95%, kuze kube sekusondele ku-100%, i-voltage yebhethri yehla kancane.
3. Uma izinga lokushisa langaphakathi lebhethri lifinyelela cishe ku-100 ° C, i-voltage yebhethri yehla kakhulu, okungenzeka kubangelwe ukwehla kokumelana kwangaphakathi kwebhethri ngenxa yokwanda kwezinga lokushisa.
Indawo IV
1. Uma izinga lokushisa langaphakathi lebhethri lingaphezu kuka-135 ° C, isihlukanisi se-PE siqala ukuncibilika, ukumelana kwangaphakathi kwebhethri kuphakama ngokushesha, i-voltage ifinyelela umkhawulo ongaphezulu (~ 12V), futhi okwamanje iyancipha ibe ngaphansi. inani.
2. Phakathi kuka-10-12V, i-voltage yebhethri ayizinzile futhi yamanje iyashintshashintsha.
3. Ukushisa kwangaphakathi kwebhethri kuphakama ngokushesha, futhi izinga lokushisa likhuphukela ku-190-220 ° C ngaphambi kokuba ibhethri iqhume.
4. Ibhethri liphukile.
Ukushajwa ngokweqile kwamabhethri e-ternary kufana nalokho kwamabhethri e-lithium cobalt oxide.Uma eshajwa kakhulu amabhethri e-ternary ngamagobolondo e-aluminium ayizikwele emakethe, i-OSD noma i-CID izovulwa isebenze uma kungena ku-Zone III, futhi elamanje lizonqanyulwa ukuze kuvikelwe ibhethri ekushajweni ngokweqile.
Izithenjwa
Ijenali ye-The Electrochemical Society, 148 (8) A838-A844 (2001)
Isikhathi sokuthumela: Dec-07-2022