Ukulawula njani ukulahleka kwe-thermal yeebhetri ze-lithium ion?

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1. I-Electrolytic liquid flame retardant electrolyte flame retardant yindlela esebenza kakhulu yokunciphisa i-thermal ephuma ngaphandle kolawulo, kodwa ezi retardants zedangatye zihlala zinefuthe elibi kwiipropati ze-electrochemical yeebhetri ze-lithium ion, ngoko kunzima ukuba ngokwenene Ukusetyenziswa. Ukuze kulungiswe le ngxaki, iqela le-Yuqiao laseSheng Diego, eCalifornia, eChina [1] ligcina i-DBA (i-dibenzylamine) ye-flame retardant (dibenzylamine) ngaphakathi kwe-microcapsules kwimeko yephakheji ye-capsule, i-dispersion in the electrolyte, ayiyi Xa iimpawu zombane zebhetri ye-lithium-ion, i-flame retardant kule capsules, ibhetri iya kutshatyalaliswa, kwaye ibhetri ikhutshwe. ukwenzeka kokulahleka kobushushu.

Iqela le-2018 Yuqiao [2] liphinda lisebenzise ubuchule obungasentla, i-ethylene glycol kunye ne-ethylenediamine zisetyenziswa njenge-flame retardant, kwaye inxalenye yangaphakathi yebhetri ye-lithium ion ilayishwe kwibhetri ye-lithium-ion iye yehla nge-70% kuvavanyo lwe-acupuncture. Ukunciphisa kakhulu umngcipheko we-thermal ngaphandle kolawulo lweebhetri ze-lithium ion. Indlela ekhankanywe ngasentla kukuzitshabalalisa, oko kukuthi, xa i-flame retardant isetyenzisiwe, yonke ibhetri ye-lithium-ion iya kuchithwa, kunye neqela le-Atsuoyamada leYunivesithi yaseTokyo, eJapan [3] liye laphuhlisa uhlobo oluvela kwi-lithium Flame retardant electrolyte ye-ion battery properties, isisombululo se-electrolytic sisebenzisa ukugxila okuphezulu kweNalin (SO2F) okanye i-Nalin (SO2F) (LIFSA) njengetyuwa ye-lithium, kunye ne-flame retardant eqhelekileyo yongezwa apho.

I-ester TMP ikwandisa kakhulu ukuzinza kwe-thermal yebhethri ye-lithium ion, enamandla ngakumbi. Ukongezwa kwe-retardant yomlilo akuchaphazeli ukusebenza komjikelo webhetri ye-lithium ion, kwaye ibhetri ithatha i-electrolyte iyakwazi ukuzinza ijikelezwe ngamaxesha angaphezu kwama-1000 (C / 5) amaxesha angama-1200 ekujikelezeni, izinga lokugcinwa kwamandla 95%). Ngokusebenzisa i-additive, ibhetri ye-lithium ion inophawu lokubuyiswa komlilo yenye yeendlela zokulahleka kobushushu bebhetri ye-lithium ion, kwaye abanye abantu banenye indlela, ezama ukwenzeka i-short-circuited kwibhetri ye-lithium-ion ukusuka kwingcambu yeengcambu, ngaloo ndlela kufezekiswa injongo ye-bottom yeketile, Ukuphelisa ngokucokisekileyo ukwenzeka kokulawula ukushisa.

Kwimeko yebhetri ye-lithium-ion eguqukayo, inokujongana neempembelelo zobundlobongela xa isetyenziswa. I-Gabrielm.veith ye-American Oak Ridge National Laboratory iyile i-electrolyte eneempawu zokuchetywa kwe-shear thickening [4], i-electrolyte isebenzisa i-non-Newton Ulwelo lubonakaliswe, kwimeko yesiqhelo, i-electrolyte ibonakaliswe kwimeko yolwelo, kodwa kwimeko yempembelelo yequbuliso, imeko eqinile ibonakaliswe, iba yomelele ngokungaqhelekanga, kwaye inokufikelela kwimpembelelo yomngcipheko we-lithiti emfutshane kwi-bullet. okubangelwa bubushushu obuphumayo bebhetri xa i-ion ibhetri ingqubana.

2. Ukwakhiwa kwebhetri Okulandelayo, siza kubona indlela yokunika ubushushu ngaphandle kolawulo, kwaye ibhetri ye-lithium-ion yangoku iqwalasela ingxaki ye-thermal ngaphandle kolawulo kuyilo lwesakhiwo, njengebhetri ye-18650. Kuya kubakho ivalve yokunciphisa uxinzelelo kwikhava, kwaye inokukhutshwa ngexesha xa ubushushu bungalawulekiyo, kwaye kuya kubakho i-coefficient ye-coefficient yobushushu obulungileyo kwibhetri yesibini ephezulu.

Ukuchasana kombane wezinto ze-PTC kwanda kakhulu ngexesha lokunyuka kobushushu bokulahleka kobushushu. Enkulu ukunciphisa ukuncipha kwangoku. Ukongeza, kuyilo lwesakhiwo seseli, qwalasela uyilo olufutshane lwesekethe phakathi kwee-electrode ezilungileyo nezingalunganga, kwaye isilumkiso sibangelwa ziimpazamo, kwaye izinto ezigqithisileyo zesinyithi zibangela ukuba ibhetri ibe nesekethe emfutshane yangaphandle, ebangela iingozi zokhuseleko.

Okwesibini, xa ibhetri iyilwe, kusetyenziswa i-diaphragm ekhuseleke ngakumbi, umzekelo, i-diaphragm enemigangatho emithathu ye-shuttle ezenzekelayo kumaqondo obushushu aphezulu, kodwa kwiminyaka yakutshanje, ngokuphuculwa okuqhubekayo koxinano lwamandla ebhetri, i-diaphragm edibeneyo enemigangatho emithathu iye yagqitywa, i-ceramic coating diaphragm ethe yapheliswa ngokuthe ngcembe, i-ceramic coating, i-diaphragm yokuxhasa i-diaphrag yokuxhasa i-diaphrag. isahluli kwiqondo lokushisa eliphezulu, ukuphucula ukuzinza kwe-thermal yebhetri ye-lithium ion, ukunciphisa umngcipheko we-thermal ngaphandle kolawulo lweebhetri ze-lithium ion. 3. Ipakethe yebhetri uyilo lokhuseleko lobushushu Ibhetri ye-lithium-ion idla ngokuvela kumashumi, amakhulu okanye amawaka ebhetri aquka ngokunxuseneyo, njengeeModels zikaTesla iipakethi zebhetri.

Ngaphezulu kwe-7,000 18650, ukuba enye yeebhetri i-thermal ngaphandle kolawulo, inokusasazeka kwipakethi yebhetri, ibangele imiphumo emibi. Ngokomzekelo, ngoJanuwari 2013, inkampani yaseJapan yaseBoston, eU.SA, inkampani yaseJapan, uphando lweKomishoni yoKhuseleko lwezoThutho yase-US, ngenxa ye-75AH ye-square ye-lithium-ion ibhetri kwi-pack yebhetri. Emva kokuba ubushushu bebhetri obukufuphi bungalawulekiyo, iBoeing ifuna amanyathelo okongeza ukusasazeka okushushu okuphuma kulawulo kuzo zonke iipakethi zebhetri.

Ukuze kuthintelwe ukuphuma kwe-thermal ekulawuleni ngaphakathi kwebhetri ye-lithium ion, i-US AllCelltechnology iphuhlise ibhetri ye-lithium-ion ibhetri ye-thermal ngaphandle kokulawula izinto zokuzihlukanisa ezisekelwe kwizinto zokutshintsha isigaba [5]. Izinto ze-PCC zizaliswe phakathi kwebhetri ye-lithium ion ye-monomer, kwaye xa i-lithium ion ibhetri ipakethe iyinto eqhelekileyo, ukushisa kwebhetri yepakethe kunokudluliselwa ngokukhawuleza kwi-battery pack nge-PCC impahla, kunye ne-PCC ibhetri ye-lithium ion. Isenokunyibilika ngezinto zeparafini apho isetyenziselwa ukufunxa ubushushu obukhulu, nto leyo ethintela ubushushu bebhetri ukuba bunyuke ngakumbi, ukuze ubushushu bungapheli kwipakethi yebhetri.

Kuvavanyo lwe-acupuncture, ipakethe yebhetri epakishwe kwiibhetri ze-18650, kwaye xa kungekho zixhobo ze-PCC, ibhetri ye-thermal ngaphandle kolawulo ekugqibeleni iya kukhokelela kwiibhetri ze-20 kwi-pack yebhetri, kwaye isebenzise izinto ze-PCC. Kwipakethi yebhetri, i-thermal yebhetri engalawulekiyo ayibangeli ezinye iipakethi zebhetri. .