Ukugcinwa kwamandlaiibhetri ze-lithium iron phosphatezisetyenziswa kakhulu kwindawo yokugcina amandla, kodwa azikho iibhetri ezininzi ezinokwenza ukuba isebenze ngokuzinzileyo ixesha elide.Ubomi bokwenene bebhetri ye-lithium-ion buchatshazelwa yizinto ezahlukeneyo, kubandakanywa neempawu zomzimba zeseli, ukushisa kwendawo, ukusebenzisa iindlela kunye nokunye.Phakathi kwabo, iimpawu zomzimba zeseli zinempembelelo enkulu kubomi bokwenene beebhetri ze-lithium-ion.Ukuba iimpawu zomzimba zeseli azihlangabezani nemeko yangempela okanye ukuba ibhetri ineengxaki ezithile ngexesha lokusetyenziswa, iya kuchaphazela ubomi bayo bokwenene kunye nomsebenzi wangempela.
1. Umrhumo ogqithisileyo
Ngaphantsi kokusetyenziswa okuqhelekileyo, inani lemijikelo yokutshaja yelithium iron phosphate ibhetrikufuneka ibe ngamaxesha angama-8-12, kungenjalo kuya kubangela ukutshaja.Ukugqithisa kuya kubangela ukuba izinto ezisebenzayo zeseli zidliwe kwinkqubo yokukhupha kwaye zingaphumeleli.Ubomi benkonzo buyancipha njengoko umthamo webhetri uyancipha ngokuthe ngcembe.Kwangaxeshanye, ubunzulu bokutshaja obuphezulu kakhulu buya kukhokelela ekwandeni kwepolarization, ukonyusa izinga lokubola kwebhetri kunye nokwenza bufutshane ubomi bebhetri;ukutshaja ngokugqithisileyo kuya kukhokelela ekubolekeni kwe-electrolyte kwaye kwandise ukubola kwenkqubo yangaphakathi ye-electrochemical yebhetri.Ngoko ke, ubunzulu bokutshaja kufuneka bulawuleke ngexesha lokusetyenziswa kwebhetri ukunqanda ukutshaja.
2. Iseli yebhetri yonakele
Lithium iron phosphate ibhetrikweyona sicelo nayo iyakuchatshazelwa yimeko yangaphandle.Ngokomzekelo, ngempembelelo okanye izinto zomntu, ezifana ne-short-circuit okanye ukubola kwamandla ngaphakathi kumbindi;ingundoqo kwinkqubo yokutshaja kunye nokukhupha amandla ombane angaphandle, ubushushu, okubangela umonakalo wesakhiwo sangaphakathi, ukukhukuliseka kwezinto zangaphakathi, njl.Kwinkqubo yokusebenzisa ukukhutshwa kwebhetri ukubola kwemeko yokubola kufuneka kuhlawulwe ngexesha elifanelekileyo, xa kungavunyelwanga ukutshaja kufuneka kukhutshwe kuqala emva kokutshaja;iseli kwinkqubo yokutshaja kunye nokukhupha izinto ezingaqhelekanga kufuneka iyeke ukutshaja okanye ibuyisele iseli ngexesha elifanelekileyo ixesha elide ngaphandle kokusetyenziswa okanye ukutshaja ngokukhawuleza kuya kubangela ulwakhiwo lwangaphakathi lomonakalo webhetri kwaye lukhokelele ekulahlekeni kwamanzi eseli.Ukongeza, kufuneka ubeke ingqalelo kumgangatho weeseli zebhetri kunye nemiba yokhuseleko kunye nezinye izinto kubomi bebhetri kunye nomsebenzi.
3. Ubomi bebhetri obungonelanga
Ubushushu obuphantsi be-monomer bukhokelela kubomi obufutshane beeseli, ngokubanzi, imonomer ekusetyenzisweni kobushushu benkqubo ayinakuba ngaphantsi kwe-100 ℃, ukuba iqondo lobushushu lingaphantsi kwe-100 ℃ liya kukhokelela ekuhanjisweni kwee-electron ngaphakathi iseli ukusuka kwi-cathode ukuya kwi-anode, okubangela ukuba ii-electron zebhetri azikwazi ukuhlawulwa ngokufanelekileyo, okukhokelela ekunyuseni ukubola kwamandla eseli, okukhokelela ekungaphumeleli kwebhetri (ukunciphisa ubuninzi bamandla).Utshintsho kwiiparameters zesakhiwo se-monomer nazo ziya kubangela ukuchasana kwangaphakathi, utshintsho lwevolumu kunye nokutshintsha kwamandla ombane, njl. okanye iinkqubo ezintathu zebhetri ezisetyenziswa kunye.Ubomi benkqubo yebhetri yesibini bufutshane kwaye umjikelo amaxesha ngaphantsi (ngokubanzi 1 ukuya 2 amaxesha) emva imfuno yokutshintsha, nto leyo eya kwandisa ibhetri ngokwayo iindleko zokusetyenziswa kunye neengxaki zongcoliseko lwesibini (ubushushu obuphantsi ngaphakathi kwiseli iya kukhulula amandla amaninzi kwaye wenze ukwehla kwamandla ebhetri) ukubakho;ezintathu kwinkqubo yebhetri enye ubomi ubude kwaye umjikelo amaxesha ngaphezulu (ukuya kumashumi amawaka amaxesha) emva inzuzo iindleko (xa kuthelekiswa ternary lithium iibhetri) (kunye noxinano lwamandla aphezulu).Ubomi obufutshane benkonzo kunye nemijikelo encinci phakathi kweseli enye iya kuba nokuhla kwamandla amakhulu (oku kubangelwa ukuchasana okuphantsi kwangaphakathi kweseli enye) ukuzisa ukuchasana okuphezulu kwangaphakathi kwebhetri;ubomi obude benkonzo kunye nemijikelo emininzi phakathi kweseli enye iya kubangela ukuchasana okuphezulu kwangaphakathi kwebhetri kwaye kunciphise amandla ayo (oku kungenxa yesiphaluka esifutshane sangaphakathi sebhetri) ukubangela ukuhla kwamandla ombane.
4. Ubushushu be-ambient buphezulu kakhulu kwaye buphantsi kakhulu, buya kuchaphazela ubomi bebhetri.
Iibhetri ze-lithium-ion azinampembelelo kwi-conductivity ye-lithium ion kuluhlu lweqondo lokushisa, kodwa xa ubushushu be-ambient buphezulu kakhulu okanye buphantsi kakhulu, ukuxinana kwentlawulo kumphezulu we-lithium ion kuncipha.Njengoko ingxinano yentlawulo iyancipha iya kukhokelela kwi-lithium ion kwi-electrode negative surface deembedding kunye nokukhupha.Okukhona ixesha lokukhupha, kokukhona kunokwenzeka ukuba ibhetri iya kutshajwa kakhulu okanye ikhutshwe kakhulu.Ngoko ke, ibhetri kufuneka ibe nendawo efanelekileyo yokugcina kunye neemeko ezifanelekileyo zokutshaja.Ngokubanzi, ubushushu be-ambient kufuneka ilawulwe phakathi kwe-25℃~35℃ ingagqithi kwi-35℃;umjelo wokutshaja akufanele ube ngaphantsi kwe-10 A/V;zingagqithi kwiiyure ezingama-20;intlawulo nganye kufuneka ikhutshwe ngamaxesha angama-5 ~ 10;umthamo oseleyo akufanele udlule kwi-20% yomthamo olinganisiweyo emva kokusetyenziswa;musa ukugcina kubushushu obungaphantsi kwe-5℃ ixesha elide emva kokutshaja;Isethi yebhetri akufuneki ibe mfutshane okanye itshiswe ngexesha lokutshaja nokukhupha.
5. Ukusebenza kakubi kweseli yebhetri kubangela ukuba ubomi buphantsi kunye nokusetyenziswa kwamandla aphantsi ngaphakathi kwiseli yebhetri.
Ekukhetheni izinto ze-cathode, umahluko ekusebenzeni kwezinto ze-cathode kubangela umlinganiselo wokusetyenziswa kwamandla ohlukeneyo ebhetri.Ngokubanzi, ubude bomjikelo webhetri, kokukhona ubungakanani bomlinganiselo wamandla obuninzi bezinto zecathode kwaye kokukhona ubungakanani bomlinganiselo wamandla wemonoma, kokukhona unyuka umyinge wokusetyenziswa kwamandla ngaphakathi kwebhetri.Nangona kunjalo, ngokuphuculwa kwe-electrolyte, umxholo wokongeza uyanda, njl., Ubuninzi bamandla buphezulu kwaye i-monomer yamandla iphantsi, eya kuba nefuthe ekusebenzeni kwezinto ze-cathode yebhetri.Ukuphakama komxholo we-nickel kunye ne-cobalt kwizinto eziphathekayo ze-cathode, iphezulu amathuba okwenza i-oxides engaphezulu kwi-cathode;ngelixa ithuba lokwenza i-oxides kwi-cathode lincinci.Ngenxa yale nto, izinto ze-cathode zinokuchasana okuphezulu kwangaphakathi kunye nesantya sokwandisa umthamo okhawulezayo, njl.
Ixesha lokuposa: Nov-08-2022