Ngokunyuka kwentengiso kunye nobunini bezithuthi zamandla amatsha, iingozi zomlilo zezithuthi zamandla amatsha nazo zenzeka amaxesha ngamaxesha.Uyilo lwenkqubo yolawulo lwe-thermal yingxaki ethintela uphuhliso lwezithuthi zamandla amatsha.Ukuyila inkqubo yokulawula i-thermal ezinzileyo nesebenzayo ibaluleke kakhulu ekuphuculeni ukhuseleko lwezithuthi zamandla amatsha.
Imodeli ye-thermal ye-Li-ion yebhetri isisiseko solawulo lwe-thermal yebhetri ye-Li-ion.Phakathi kwabo, ukutshintshwa kweempawu zokufudumala kunye nokuvelisa ukufudumala kweempawu zemodeli yimiba emibini ebalulekileyo ye-lithium-ion ibhetri ye-thermal modeling.Kwizifundo esele zikhona kwimodeli yeempawu zokuhambisa ubushushu kwiibhetri, iibhetri ze-lithium-ion zithathwa njenge-anisotropic thermal conductivity.Ngoko ke, kubaluleke kakhulu ukufunda impembelelo yeendawo ezahlukeneyo zokutshintshwa kobushushu kunye neendawo zokutshintshwa kobushushu kwi-thermal dissipation kunye ne-thermal conductivity yeebhetri ze-lithium-ion kuyilo lweenkqubo ezisebenzayo nezithembekileyo zokulawula ubushushu kwiibhetri ze-lithium-ion.
I-50 A·h i-lithium yentsimbi ye-phosphate i-cell cell isetyenziswe njengento yophando, kunye neempawu zayo zokuziphatha zokushisa ukushisa zahlaziywa ngokubanzi, kwaye ingcamango entsha yoyilo lolawulo lwe-thermal yaphakanyiswa.Ubume beseli buboniswe kwi-Figure 1, kunye neeparitha zobukhulu obuthile ziboniswa kwiThebhile 1. Isakhiwo sebhetri ye-Li-ion ngokuqhelekileyo ibandakanya i-electrode efanelekileyo, i-electrode engalunganga, i-electrolyte, i-separator, i-electrode lead lead, i-electrode engalunganga, i-terminal terminal, izinto ezigqumayo, ivalve yokhuseleko, i-coefficient yobushushu obufanelekileyo (PTC)(Isifudumezi esiPholisayo se-PTC/Isifudumezi-moya se-PTC) i-thermistor kunye nebhetri yecala.Isahluli sidityaniswe phakathi kweziqwenga zepali ezilungileyo nezingalunganga, kwaye undoqo webhetri wenziwa ngokujija okanye iqela lepali lenziwe ngokulanywa.Yenza lula i-multi-layer cell structure ibe yi-cell material enobungakanani obufanayo, kwaye wenze unyango olulinganayo kwiiparamitha ze-thermophysical zeseli, njengoko kuboniswe kuMzobo 2. Izinto zeseli yebhetri zithathwa njengeyunithi ye-cuboid eneempawu ze-anisotropic ze-thermal conductivity. , kunye ne-thermal conductivity ( λz ) i-perpendicular ukuya kwi-stacking direction ye-stacking imiselwe ukuba ibe yincinci kune-thermal conductivity ( λ x, λy ) ngokuhambelana nesikhokelo sokupakisha.
(1) Umthamo wokutshatyalaliswa kobushushu beskimu solawulo lwe-thermal ye-lithium-ion ibhetri iya kuchatshazelwa ziiparamitha ezine: i-thermal conductivity perpendicular to the surface dissipation surface, umgama wendlela phakathi kombindi womthombo wobushushu kunye nendawo yokulahla ubushushu, ubungakanani bomphezulu wokutshatyalaliswa kobushushu beskimu solawulo lwe-thermal, kunye nokwahlukana kweqondo lokushisa phakathi kwendawo yokulahla ubushushu kunye nokusingqongileyo.
(2) Xa ukhetha indawo yokulahla ubushushu kuyilo lolawulo olushushu lweebhetri ze-lithium-ion, iskimu sokuhambisa ubushushu kwicala lento ekhethiweyo yophando ingcono kunenkqubo yokuhambisa ubushushu bomgangatho ophantsi, kodwa kwiibhetri zesikwere ezinobungakanani obahlukeneyo, kuyimfuneko. ukubala umthamo wokulahla ubushushu kwiindawo ezahlukeneyo zokulahla ubushushu ukuze kumiselwe eyona ndawo ingcono yokupholisa.
(3) Ifomula isetyenziselwa ukubala nokuvavanya amandla okutshatyalaliswa kobushushu, kwaye ukulinganisa kwamanani kusetyenziselwa ukuqinisekisa ukuba iziphumo zihambelana ngokupheleleyo, ebonisa ukuba indlela yokubala iyasebenza kwaye inokusetyenziswa njengesalathiso xa uyila ulawulo lwe-thermal. yeeseli zesikwere. (I-BTMS)
Ixesha lokuposa: Apr-27-2023
