Uhlalutyo lokuthotywa kweebhetri zeLithium-Ion zoRhwebo kwindawo yokuGcina ixesha elide

Uhlalutyo lokuthotywa kweebhetri zeLithium-Ion zoRhwebo kwindawo yokuGcina ixesha elide. Iibhetri zeLithium-ion ziye zaba yimfuneko kuwo wonke amashishini ahlukeneyo ngenxa yoxinano lwamandla aphezulu kunye nokusebenza kakuhle. Nangona kunjalo, ukusebenza kwabo kuyehla ngokuhamba kwexesha, ngakumbi ngexesha elongezelelweyo lokugcina. Ukuqonda iindlela kunye nezinto eziphembelela oku kuthotywa kubalulekile ekwandiseni ubomi bebhetri kunye nokwandisa ukusebenza kwazo. Eli nqaku lijonge kuhlalutyo lokuthotywa kweebhetri ze-lithium-ion zorhwebo kwindawo yokugcina ixesha elide, enikezela ngezicwangciso ezisebenzayo zokunciphisa ukwehla kokusebenza kunye nokwandisa ubomi bebhetri.

IiNdlela zokuSebenza eziPhambili:

Ukuzikhupha

Ukusabela kweekhemikhali zangaphakathi ngaphakathi kweebhetri ze-lithium-ion kubangela ukulahleka okuthe ngcembe kwamandla nangona ibhetri ingasebenzi. Le nkqubo yokuzikhupha, nangona ngokuqhelekileyo icotha, inokukhawuleziswa ngamaqondo obushushu aphakamileyo okugcina. Isizathu esiphambili sokuzikhupha kukusabela kwecala okubangelwa ukungcola kwi-electrolyte kunye neziphene ezincinci kwizinto ze-electrode. Ngelixa ezi ntshukumo zihamba kancinane kwiqondo lobushushu begumbi, izinga lazo liphinda kabini ngokunyuka kweqondo lobushushu nge-10°C. Ke ngoko, ukugcina iibhetri kumaqondo obushushu aphezulu kunokuba kunconyiwe kunokunyusa kakhulu izinga lokuzikhupha, okukhokelela ekuncipheni okukhulu kwamandla phambi kokusetyenziswa.

Iimpendulo ze-Electrode

Ukuphendula kwecala phakathi kwe-electrolyte kunye ne-electrodes kubangela ukubunjwa kobume obuqinileyo be-electrolyte (SEI) kunye nokuthotywa kwezinto ze-electrode. Uluhlu lwe-SEI lubalulekile ekusebenzeni okuqhelekileyo kwebhetri, kodwa kubushushu obuphezulu, buqhubeka buqina, busebenzisa i-lithium ion kwi-electrolyte kunye nokwandisa ukumelana kwangaphakathi kwebhetri, ngaloo ndlela ukunciphisa umthamo. Ngaphezu koko, amaqondo obushushu aphezulu anokwenza ukuba ukwakheka kwesixhobo se-electrode kungazinzi, kubangele iintanda kunye nokubola, kunciphise ngakumbi ukusebenza kwebhetri kunye nobomi.

Ilahleko yeLithium

Ngexesha lemijikelezo yokukhupha intlawulo, ezinye ii-ion ze-lithium zibanjiswa ngokusisigxina kwi-electrode ye-lattice structure, ezenza zingafumaneki kwiimpendulo zexesha elizayo. Le lahleko ye-lithium yongezwa kubushushu obuphezulu bokugcina ngenxa yokuba amaqondo obushushu aphezulu akhuthaza ii-ion ze-lithium ezininzi ukuba zifakwe ngokungenakuguqulwa kwiziphene ze-lattice. Ngenxa yoko, inani le-ion ze-lithium ekhoyo liyancipha, likhokelela ekuphelelweni kwamandla kunye nobomi obufutshane bomjikelezo.

Imiba echaphazela izinga lokuthotywa kwesidima

Ubushushu bokugcina

Ubushushu sesona sigqibo siphambili sokuhla kwebhetri. Iibhetri kufuneka zigcinwe kwindawo epholileyo, eyomileyo, ephakathi kwe-15°C ukuya kuma-25°C, ukucothisa inkqubo yokuthotywa. Amaqondo obushushu aphezulu akhawulezisa amanqanaba okusabela kweekhemikhali, ukwandisa ukuzikhupha kunye nokwakheka kwe-SEI layer, ngaloo ndlela kukhawulezisa ukuguga kwebhetri.

Imeko yentlawulo (SOC)

Ukugcina i-SOC inxalenye (malunga ne-30-50%) ngexesha lokugcina kunciphisa uxinzelelo lwe-electrode kwaye kunciphisa izinga lokuzikhupha, ngaloo ndlela ukwandisa ubomi bebhetri. Omabini amanqanaba aphezulu kunye aphantsi e-SOC anyusa uxinzelelo lwempahla ye-electrode, ekhokelela kutshintsho lwesakhiwo kunye neempendulo ezininzi zecala. Inxalenye ye-SOC ilinganisa uxinzelelo kunye nomsebenzi wokuphendula, ithoba isantya sokuthotywa.

Ubunzulu bokukhutshwa (DOD)

Iibhetri eziphantsi kokukhutshwa okunzulu (i-DOD ephezulu) zithomalalisa ngokukhawuleza xa zithelekiswa nezo zikhutshwa ngokungekho nzulu. Ukukhutshwa okunzulu kubangela utshintsho olubaluleke ngakumbi kwisakhiwo kwimathiriyeli ye-electrode, ukudala iintanda ezininzi kunye neemveliso zempendulo zecala, ngaloo ndlela kwandisa izinga lokuthotywa. Ukunqanda ukukhupha iibhetri ngokupheleleyo ngexesha lokugcinwa kunceda ukunciphisa le mpembelelo, ukwandisa ubomi bebhetri.

Ubudala bekhalenda

Iibhetri ngokwendalo ziwohloka ngokuhamba kwexesha ngenxa yeekhemikhali zendalo kunye neenkqubo zomzimba. Naphantsi kweemeko ezifanelekileyo zokugcina, amacandelo ekhemikhali ebhetri aya kubola ngokuthe ngcembe kwaye angaphumeleli. Izenzo ezifanelekileyo zokugcina zingayithothisa le nkqubo yokuguga kodwa ayikwazi ukuyithintela ngokupheleleyo.

IiNdlela zokuHlalutya ukuthotywa:

Umyinge wokuphela komthamo

Ukulinganisa umthamo wokukhupha ibhetri ngamaxesha athile kunika indlela ethe ngqo yokulandelela ukuthotywa kwayo ekuhambeni kwexesha. Ukuthelekisa umthamo webhetri ngamaxesha ahlukeneyo kuvumela ukuvavanya izinga lokuthotywa kwayo kunye nobungakanani, okwenza izenzo zokulondolozwa kwangexesha.

I-electrochemical impedance spectroscopy (EIS)

Obu buchule buhlalutya ukuxhathisa kwangaphakathi kwebhetri, kunika ulwazi oluneenkcukacha kwiinguqu kwiimpawu ze-electrode kunye ne-electrolyte. I-EIS inokubona utshintsho kwi-impedance yangaphakathi yebhetri, inceda ukuchonga oonobangela abathile bokuthotywa, njengokujiya kwe-SEI okanye ukuwohloka kwe-electrolyte.

Uhlalutyo lwasemva kwesidumbu

Ukuqhawula ibhetri eyonakeleyo kunye nokuhlalutya i-electrode kunye ne-electrolyte usebenzisa iindlela ezifana ne-X-ray diffraction (XRD) kunye ne-electron microscopy (SEM) yokuskena i-electron microscopy (SEM) inokubonisa utshintsho lomzimba kunye neekhemikhali ezenzeka ngexesha lokugcinwa. Uhlalutyo lwe-post-mortem lubonelela ngolwazi oluthe kratya malunga notshintsho lwesakhiwo kunye nokwakheka ngaphakathi kwebhetri, inceda ekuqondeni iindlela zokunciphisa umgangatho kunye nokuphucula uyilo lwebhetri kunye nezicwangciso zokulondoloza.

Amaqhinga okunciphisa

Ugcino olupholileyo

Gcina iibhetri kwindawo epholileyo, elawulwayo ukunciphisa ukuzikhupha kunye nezinye iindlela zokuthotywa kweqondo lokushisa. Ngokufanelekileyo, gcina ubushushu obuphakathi kwe-15°C ukuya kuma-25°C. Ukusebenzisa izixhobo zokupholisa ezizinikeleyo kunye neenkqubo zolawulo lokusingqongileyo kunokucothisa kakhulu inkqubo yokuguga kwebhetri.

Indawo yokugcina intlawulo

Gcina i-SOC inxalenye (malunga ne-30-50%) ngexesha lokugcina ukunciphisa uxinzelelo lwe-electrode kunye nokunciphisa ukuthotywa. Oku kufuna ukusetwa iindlela ezifanelekileyo zokutshaja kwisixokelelwano solawulo lwebhetri ukuqinisekisa ukuba ibhetri ihlala ikuluhlu lwe-SOC olulolona lufanelekileyo.

Ukubeka iliso rhoqo

Ngamathuba athile beka iliso kumthamo webhetri kunye nevoltheji yombane ukubona iindlela zokuthotywa. Ukuphumeza amanyathelo okulungisa njengoko kuyimfuneko ngokusekelwe kolu qwalaselo. Ukubeka iliso rhoqo kunokubonelela ngezilumkiso zakwangoko malunga nemiba enokwenzeka, ukuthintela ukusilela ngequbuliso kwebhetri ngexesha lokusetyenziswa.

Iinkqubo zolawulo lwebhetri (BMS)

Sebenzisa i-BMS ukujonga impilo yebhetri, ukulawula imijikelo yokukhupha intlawulo, kunye nokuphumeza iimpawu ezinjengokulinganisa iiseli kunye nolawulo lobushushu ngexesha lokugcina. I-BMS inokubona imeko yebhetri ngexesha lokwenyani kwaye ilungelelanise ngokuzenzekelayo iiparamitha zokusebenza ukwandisa ubomi bebhetri kunye nokwandisa ukhuseleko.

Ukuqukumbela

Ngokuqonda ngokupheleleyo iindlela zokuthotywa, izinto ezinempembelelo, kunye nokuphumeza izicwangciso ezisebenzayo zokunciphisa, unokuphucula kakhulu ulawulo lokugcinwa kwexesha elide lweebhetri ze-lithium-ion zorhwebo. Le ndlela yenza kube lula ukusetyenziswa kwebhetri kwaye yandise ubomi babo bonke, iqinisekisa ukusebenza okungcono kunye nokusebenza kakuhle kweendleko kwizicelo zemizi-mveliso. Ukufumana izisombululo eziphezulu zokugcina amandla, qwalaselaI-215 kWh iNkqubo yokuGcinwa kwamandla oRhwebo kunye noShishino by Kamada Amandla.

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