Kwiminyaka yakutshanje, umlilo kunye nokuqhuma kwenzeka rhoqo kwezinye iifektri ze-electronics, kwaye ukhuseleko lweebhetri ze-lithium luye lwaba yinto echaphazelekayo kubathengi.Umlilo wamandla ibhetri ye-lithium-ionipakethe inqabile kakhulu, kodwa yakuba yenzekile, iya kubangela ukusabela okunamandla kwaye ibangele ukuvezwa okuninzi.Imililo yepakethe yebhetri yelithium inokubangelwa yimpazamo ngaphakathi kwebhetri kunebhetri ngokwayo.Esona sizathu siphambili kukubaleka kwe-thermal.
Unobangela womlilo kumandla e-lithium battery pack
Esona sizathu siphambili somlilo we ibhetri ye-lithium pack kukuba ukushisa kwibhetri akukwazi ukukhutshwa ngokweemfuno zokuyila, kwaye umlilo ubangelwa emva kokufikelela kwindawo yokutshisa izinto zokutsha zangaphakathi nangaphandle, kwaye izizathu eziphambili zale nto yisiphaluka esifutshane sangaphandle, ubushushu obuphezulu bangaphandle kunye nangaphakathi. intambo emfutshane..
Njengomthombo wamandla wezithuthi zombane ezicocekileyo, eyona nto ibangela umlilo kwiipakethi zebhetri ze-lithium-ion kukubaleka kwe-thermal okubangelwa ukufudumala kwebhetri, okunokwenzeka ukuba kwenzeke ngexesha lokutshaja kunye nokukhupha ibhetri.Ekubeni ibhetri ye-lithium-ion ngokwayo inokuchasana okuthile kwangaphakathi, iya kuvelisa umlinganiselo othile wokushisa ngelixa ikhupha amandla ombane ukubonelela ngamandla kwizithuthi zombane ezicocekileyo, eziza kwandisa ubushushu bayo.Xa ubushushu bayo budlula ubushushu obuqhelekileyo bokusebenza, ibhetri yonke ye-lithium iya konakaliswa.Ubomi obude kunye nokhuseleko lweqela.
Iinkqubo yebhetri yamandlayenziwe ngeeseli ezininzi zebhetri zamandla.Ngexesha lenkqubo yokusebenza, ubushushu obuninzi buyenziwa kwaye buqokelelwe kwibhokisi encinci yebhetri.Ukuba ubushushu abukwazi ukutshatyalaliswa ngokukhawuleza ngexesha, ubushushu obuphezulu buya kuchaphazela ubomi bamandla e-lithium ibhetri yepakethe kunye nokubaleka kwe-Thermal kwenzeka, okukhokelela kwiingozi ezifana nomlilo kunye nokuqhuma.
Ngokubhekiselele kwi-thermal runaway ye-lithium-ion battery packs, izixazululo eziqhelekileyo zasekhaya zangoku ziphuculwe kakhulu kwiinkalo ezimbini: ukukhuselwa kwangaphandle kunye nokuphuculwa kwangaphakathi.Ukukhuselwa kwangaphandle kubhekiselele ekuphuculeni nasekuphuculeni inkqubo, kwaye ukuphuculwa kwangaphakathi kubhekiselele ekuphuculweni kwebhetri ngokwayo.
Nazi izizathu ezihlanu zokuba kutheni iipakethi zebhetri ze-lithium zibamba umlilo:
1. Isiphaluka esifutshane sangaphandle
Isiphaluka esifutshane sangaphandle sinokubangelwa ukusebenza okungafanelekanga okanye ukusetyenziswa kakubi.Ngenxa yesiphaluka esifutshane sangaphandle, ukukhutshwa kwangoku kwepakethi yebhetri ye-lithium kukhulu kakhulu, okuya kubangela ukuba intsimbi yentsimbi ishushu.Ukushisa okuphezulu kuya kubangela ukuba i-diaphragm ngaphakathi kwintsimbi yentsimbi iyancipha okanye yonakaliswe ngokupheleleyo, okubangela umjikelezo omfutshane wangaphakathi kunye nomlilo .
2. Isiphaluka esifutshane sangaphakathi
Ngenxa yesenzeko sesekethe esifutshane sangaphakathi, ukukhutshwa okuphezulu kwangoku kweseli yebhetri kudala ubushushu obuninzi, obutshisa i-diaphragm, okukhokelela kwisenzeko esikhulu sesekethe esifutshane, okukhokelela kubushushu obuphezulu, i-electrolyte ibola ibe yigesi, kwaye yangaphakathi. uxinzelelo lukhulu kakhulu.Xa igobolondo langaphandle le-core alikwazi ukumelana nolu xinzelelo, i-core ibamba umlilo.
3. Umrhumo ongaphezulu
Xa i-iron core ihlawuliswa kakhulu, ukukhululwa ngokugqithiseleyo kwe-lithium kwi-electrode efanelekileyo kuya kutshintsha isakhiwo se-electrode efanelekileyo.I-lithium eninzi ifakwe ngokulula kwi-electrode engalunganga, kwaye kulula ukubangela ukuba i-lithium iqhube phezu kwendawo ye-electrode engafanelekanga.Xa i-voltage idlula i-4.5V, i-electrolyte iya kubola kwaye ivelise inani elikhulu legesi.Zonke ezi zinto zinokubangela imililo.
4. Isiqulatho samanzi siphezulu kakhulu
Amanzi anokusabela nge-electrolyte kumbindi ukuze enze igesi.Xa utshaja, inokusabela kunye ne-lithium eyenziweyo ukuvelisa i-lithium oxide, eya kubangela ukulahlekelwa kwamandla angundoqo, kwaye kulula kakhulu ukuba kubangele ukuba i-core ihlawulwe ngokugqithisileyo ukuvelisa igesi.Amanzi anombane ophantsi wokubola kwaye abola ngokulula abe yigesi ngexesha lokutshaja.Xa ezi gesi ziveliswa, uxinzelelo lwangaphakathi lwe-core landa xa igobolondo langaphandle le-core alikwazi ukumelana nezi gesi.Ngelo xesha, i-core iya kuqhuma.
5. Umthamo we-electrode onganelanga ngokwaneleyo
Xa amandla e-electrode engalunganga xa ethelekiswa ne-electrode encomekayo enganelanga, okanye akukho mthamo kwaphela, enye okanye yonke i-lithium eyenziwe ngexesha lokutshaja ayinakufakwa kwisakhiwo se-interlayer yegraphite ye-electrode negative, kwaye iya kufakwa umphezulu we-electrode ongalunganga.I-"dendrite" ehamba phambili, inxalenye yale protuberance inokuthi ibangele imvula ye-lithium ngexesha lokuhlawuliswa okulandelayo.Emva kwamashumi ukuya kumakhulu emijikelezo yokutshaja kunye nokukhupha, "i-dendrites" iya kukhula kwaye ekugqibeleni igqobhoze iphepha le-septum, ifutshane ngaphakathi.
Ixesha lokuposa: Jan-10-2022