Ukugqithisa ngenye yezinto ezinzima kakhulu kwi-lithium yokuvavanya ukhuseleko lwebhetri yangoku, ngoko ke kuyimfuneko ukuqonda indlela yokuhlawula ngokugqithiseleyo kunye nemilinganiselo yangoku yokuthintela ukugqithisa.
Umfanekiso we-1 yi-voltage kunye ne-curves yokushisa ye-NCM + LMO / Gr ibhetri yenkqubo xa igcwele kakhulu.I-voltage ifikelela kwinqanaba eliphezulu kwi-5.4V, kwaye emva koko i-voltage yehla, ekugqibeleni ibangela ukubaleka kwe-thermal.I-voltage kunye neqondo lokushisa elijikisiweyo lokutshajiswa kwebhetri ye-ternary zifana kakhulu nayo.
Xa ibhetri ye-lithium ihlawuliswa kakhulu, iya kuvelisa ukushisa kunye negesi.Ubushushu bubandakanya ubushushu be-ohmic kunye nobushushu obuveliswa ziimpendulo zecala, apho ubushushu be-ohmic yeyona nto iphambili.Ukusabela kwecala lebhetri okubangelwa ukutshaja ngokugqithiseleyo okokuqala ukuba i-lithium engaphezulu ifakwe kwi-electrode engalunganga, kwaye i-lithium dendrites iya kukhula phezu kwendawo ye-electrode engafanelekanga (umlinganiselo we-N / P uya kuchaphazela i-SOC yokuqala ye-lithium dendrite ukukhula).Okwesibini kukuba i-lithium engaphezulu ikhutshwe kwi-electrode efanelekileyo, ebangela ukuba ukwakheka kwe-electrode efanelekileyo kuphele, ukukhulula ukushisa kunye nokukhulula i-oksijini.I-oksijeni iya kukhawulezisa ukubola kwe-electrolyte, uxinzelelo lwangaphakathi lwebhetri luya kuqhubeka nokunyuka, kwaye i-valve yokukhusela iya kuvula emva kwezinga elithile.Uqhagamshelwano lwezinto ezisebenzayo kunye nomoya uvelisa ngakumbi ubushushu.
Uphononongo lubonise ukuba ukunciphisa umthamo we-electrolyte kuya kunciphisa kakhulu ubushushu kunye nokuveliswa kwegesi ngexesha lokutshaja.Ukongezelela, kuye kwafundwa ukuba xa ibhetri ingenayo i-splint okanye i-valve yokhuseleko ayikwazi ukuvulwa ngokuqhelekileyo ngexesha lokutshaja, ibhetri ilungele ukuqhuma.
Ukutshaja okugqithisileyo akusayi kubangela ukubaleka kwe-thermal, kodwa kuya kubangela ukuncipha kwamandla.Uphononongo lufumene ukuba xa ibhetri ene-NCM / LMO yezinto ezixubileyo njenge-electrode efanelekileyo igqithiswe, akukho nto ibonakalayo yokubola kwamandla xa i-SOC ingaphantsi kwe-120%, kwaye umthamo ubola kakhulu xa i-SOC iphezulu kune-130%.
Okwangoku, kukho iindlela ezininzi zokusombulula ingxaki yokutshaja kakhulu:
I-1) I-voltage yokukhusela isetyenziswe kwi-BMS, ngokuqhelekileyo i-voltage yokukhusela iphantsi kwe-voltage ephezulu ngexesha lokugqithisa;
2) Ukuphucula ukuxhathisa kwebhetri ngokuguqulwa kwezinto (ezifana nokugubungela izinto);
3) Yongeza izongezo ezichasene ne-anti-overcharge, njengezibini ze-redox, kwi-electrolyte;
4) Ngokusetyenziswa kwe-membrane ye-voltage-sensitive membrane, xa ibhetri igqithiswe, ukuchasana kwe-membrane kuyancipha kakhulu, okusebenza njenge-shunt;
I-5) Uyilo lwe-OSD kunye ne-CID lusetyenziswa kwi-square aluminiyam iibhetri ze-square, ezizizo ziyilo eziqhelekileyo zokulwa ne-overcharge.Ibhetri yesingxobo ayikwazi ukufikelela kuyilo olufanayo.
Iimbekiselo
Izinto zokuGcinwa kwamandla 10 (2018) 246-267
Ngeli xesha, siya kwazisa i-voltage kunye nokutshintsha kweqondo lokushisa kwebhetri ye-lithium cobalt oxide xa igcwele kakhulu.Umfanekiso ongezantsi yi-voltage ye-overcharge kunye ne-curve yeqondo lokushisa le-lithium cobalt oxide ibhetri, kunye ne-axis ethe tyaba yi-delithiation.I-electrode engalunganga yigraphite, kunye ne-electrolyte solvent yi-EC/DMC.Umthamo webhetri yi-1.5Ah.Umjelo wokutshaja ngu-1.5A, kwaye ubushushu bubushushu bangaphakathi bebhetri.
Zone I
1. Amandla ombane ebhetri anyuka kancinci.I-electrode enhle ye-lithium cobalt oxide delithiates ngaphezu kwe-60%, kwaye i-lithium yensimbi iyancipha kwicala elibi le-electrode.
2. Ibhetri iyagquma, enokuthi ibe ngenxa ye-high-pressure oxidation ye-electrolyte kwicala elihle.
3. Ubushushu buzinzile ngokunyuka okuncinci.
Ummandla II
1. Ubushushu buqala ukunyuka kancinci.
2. Kuluhlu lwe-80 ~ 95%, i-impedance ye-electrode efanelekileyo iyanda, kwaye ukuchasana kwangaphakathi kwebhetri kwanda, kodwa kuncipha kwi-95%.
3. Amandla ombane ebhetri adlula i-5V kwaye afikelele kubuninzi.
Ummandla III
1. Malunga ne-95%, ubushushu bebhetri buqala ukunyuka ngokukhawuleza.
2. Ukusuka malunga ne-95%, kude kube kufutshane ne-100%, i-voltage yebhethri yehla kancane.
3. Xa ukushisa kwangaphakathi kwebhetri kufikelela malunga ne-100 ° C, i-voltage yebhethri yehla ngokukhawuleza, enokuthi ibangelwa ukuncipha kokuchasana kwangaphakathi kwebhetri ngenxa yokunyuka kweqondo lokushisa.
Ummandla IV
1. Xa ukushisa kwangaphakathi kwebhetri kuphezulu kune-135 ° C, i-PE separator iqala ukunyibilika, ukuchasana kwangaphakathi kwebhetri kuphakama ngokukhawuleza, i-voltage ifikelela kumda ophezulu (~ 12V), kwaye i-current drops ibe ngaphantsi. ixabiso.
2. Phakathi kwe-10-12V, i-voltage yebhethri ayizinzile kwaye ikhoyo ngoku iyaguquguquka.
3. Ukushisa kwangaphakathi kwebhetri kuphakama ngokukhawuleza, kwaye ukushisa kuphakama kwi-190-220 ° C ngaphambi kokuba ibhetri iqhume.
4. Ibhetri yophukile.
Ukutshaja ngaphezulu kweebhetri ze-ternary kuyafana naleyo yeebhetri ze-lithium cobalt oxide.Xa utshaja iibhetri ze-ternary ezinamaqokobhe e-aluminium yesikwere kwimarike, i-OSD okanye i-CID iya kwenziwa xa ingena kwi-Zone III, kwaye yangoku iya kunqunyulwa ukukhusela ibhetri kwi-overcharging.
Iimbekiselo
Ijenali ye-Electrochemical Society, 148 (8) A838-A844 (2001)
Ixesha lokuposa: Dec-07-2022