Ukutshaja okukhawulezayo ngokubanzi kokutshaja okunamandla aphezulu kwe-DC, isiqingatha seyure sinokuzaliswa ngama-80% ombane, ukutshaja okukhawulezayo kwe-DC yokutshaja ivoltheji ngokuqhelekileyo inkulu kunombane webhetri. Ke yeyiphi imingcipheko yokutshaja kwebhetri ye-lithium ngokukhawuleza malunga neengxaki zobugcisa bebhetri ye-lithium yokutshaja ngokukhawuleza?
Yeyiphi imingcipheko ehambelana nokutshaja ngokukhawuleza iibhetri ze-lithium?
Iindlela ezintathu ezisisiseko zokuqonda ukutshaja okukhawulezayo zezi: gcina i-voltage ingaguquguquki kwaye unyuse umsinga; gcina isigxina sangoku kwaye ukwandise i-voltage; kwaye unyuse i-current kunye ne-voltage ngexesha elinye. Nangona kunjalo, ukuqonda ngenene ukutshaja okukhawulezayo, kungekuphela nje ukuphucula langoku kunye ne-voltage inokuba njalo, itekhnoloji yokutshaja ngokukhawuleza yiseti epheleleyo yeenkqubo, kubandakanya iadaptha yokutshaja ngokukhawuleza kunye nenkqubo yolawulo lwamandla obukrelekrele.
Ukutshaja okukhawulezayo kwexesha elide kuchaphazela ubomi beebhetri ze-lithium, ibhetri ye-lithium ukutshaja ngokukhawuleza kukuhlawulela ubomi bomjikelezo webhetri, kuba ibhetri sisixhobo esenza umbane ngokusabela kwe-electrochemical reaction, ukutshaja kukwenzeka kwe-reverse chemical reaction. , kunye nokutshaja okukhawulezayo kuya kuba kwigalelo elikhawulezileyo langoku eliphezulu kwibhetri, ukusetyenziswa rhoqo kwemowudi yokutshaja ngokukhawuleza kuya kunciphisa umthamo wokunciphisa ibhetri, ukunciphisa inani lebhetri. imijikelo yokutshaja kunye nokukhupha.
Ibhetri yeLithium ukutshaja ngokukhawuleza kuzisa iziphumo ezintathu: ifuthe lobushushu, imvula yelithium kunye nefuthe lomatshini.
1. Ukutshaja ngokukhawuleza okukhawulezileyo kukhawulezisa i-polarization yeseli yebhetri
Xa umbane oqhubekayo wokutshaja mkhulu, i-ion concentration kwi-electrode iphakama, i-polarization iyanda, kwaye i-voltage ye-terminal yebhetri ayikwazi ukuhambelana ngokuthe ngqo kunye nomgca kunye nomthamo wombane ohlawulisiweyo. Ngexesha elifanayo, ukutshaja okuphezulu kwangoku, ukunyuka kokuchasana kwangaphakathi kuya kukhokelela ekwandiseni impembelelo yokufudumala kwe-Joule ebangelwa yimiphumo emibi, njengokubola kwe-electrolyte reaction, ukuveliswa kwegesi kunye noluhlu lweengxaki, umngcipheko wenyuka ngokukhawuleza, impembelelo kukhuseleko lwebhetri, ubomi beebhetri ezingasebenzisi mandla bufutshane kakhulu.
2. Ukutshaja ngokukhawuleza okuthe gqolo kunokukhokelela ekuqaqambiseni undoqo webhetri
Ibhetri yeLithium ukutshaja ngokukhawuleza kuthetha ukuba i-ion ze-lithium zikhutshwa ngokukhawuleza kwaye "ziqubhe ukuya" kwi-anode, efuna ukuba izinto ze-anode zibe nomthamo wokufakela i-lithium ngokukhawuleza, ngenxa yesakhono esifakiweyo se-lithium kunye ne-lithium precipitation enokubakho iphantse yafana, kwi-charge ekhawulezayo. okanye iimeko eziphantsi kweqondo lokushisa, i-lithium ion inokuthi iqhube phezu kwendawo yokubunjwa kwe-dendritic lithium. I-Dendritic lithium iya kugqobhoza i-diaphragm kwaye ibangele ukulahleka kwesibini, ukunciphisa umthamo webhetri. Xa i-lithium crystal ifikelela kwisixa esithile, iya kukhula isuka kwi-electrode engalunganga ukuya kwi-diaphragm, ibangele ingozi yebhetri emfutshane.
3. Ukutshaja okukhawulezayo rhoqo kuya kunciphisa ubomi bebhetri
Ukutshaja rhoqo nako kuthanda ukukhawulezisa ukuphela kobomi bebhetri, kwaye kude kukhokhelele kwiingxaki ezifana nokucutha ukusebenza kwebhetri kunye nobomi obufutshane bebhetri. Ngokukodwa emva kokongezwa kweteknoloji yokutshaja ngokukhawuleza, nangona isantya sokutshaja kwisigaba sokuqala sikhawuleza kakhulu, kodwa asizange sihlawule kwi-100% kwi-unplugging, okubangelwa ukutshaja okuninzi, ukwandisa inani lemijikelezo yebhetri, ixesha elide. ukusetyenziswa kwendlela enjalo kuya kunciphisa ukusebenza kwebhetri, ngaloo ndlela kukhawulezisa ukuguga kwebhetri.
Ukushisa okuphezulu ngoyena mbulali omkhulu we-lithium ibhetri yokuguga, ukutshaja ngokukhawuleza kwamandla aphezulu kuya kwenza ibhetri ngexesha elifutshane lokutshisa, ukutshaja okungakhawuleziyo nangona amandla ephantsi, ukushisa okuphantsi kwiyunithi nganye yexesha, kodwa kufuneka a ixesha elide-ngexesha. Ngale ndlela ubushushu bebhetri buya kuqokelelana ekuhambeni kwexesha, kwaye umahluko kubushushu obuveliswa ngexesha lokutshaja akwanelanga ukubangela umahluko kwisantya sokuguga kwebhetri.
Ukushwankathela oku ngasentla, sinokugqiba ukuba ukutshaja ngokukhawuleza kuneemfuno zomgangatho ophezulu webhetri, kunokulahlekelwa okukhulu kobomi bebhetri, kwaye ukhuseleko luya kuncitshiswa kakhulu, ngoko zama ukuyenza kancinci kangangoko xa kungekho mfuneko. Ukutshaja ngokukhawuleza okukhawulezileyo kwebhetri kuya kubangela ingozi kwibhetri, kodwa ngenxa yomahluko wokuxinana kweeseli zebhetri, izixhobo zokusebenza, ubushushu obuthile kunye nenkqubo yokulawula ibhetri, ibhetri inengxaki yokwenzakala ngexesha lokutshaja ngokukhawuleza.
Ixesha lokuposa: Oct-26-2023