How does Waterma increase the low temperature performance of lithium iron phosphate ion batteries?

Umbhali :Iflowpower-UMboneleli weSikhululo saMandla esiphathwayo

Kwiintsuku ezimbalwa ezidlulileyo, kwiNgqungquthela ye-7 ye-Global New Energy Automobile (GNEV7), iSekela likaMphathi Jikelele we-Watma u-Rao Minmin Upapashe umxholo othi "UPhando kwimiba echaphazelekayo echaphazela ibhetri yeLithium Ion yeLithium Ion". Umxholo uhlelwe ngolu hlobo lulandelayo: Okokuqala, uRao Minmin ungeniswa, i-Watma yasungulwa kwi-2002, ikomkhulu e-Shenzhen. Okwangoku kukho abasebenzi abangaphezu kwe-12,000, kunye nebhetshi yokuqala yeenkampani zebhetri ezingena kwi-lithium-ion battery directory enamandla kwi-Ofisi yoShishino kunye neTekhnoloji yoLwazi, kubandakanywa neebhetri ezingaphezu kwe-50,000 ze-Watma ezihamba endleleni.

Okwangoku, uninzi lweebhetri ze-lithium-ion zamandla kwintsimi yeemoto zabagibeli zombane ziyi-lithium iron phosphate. URao Dingmin uthe kukho iingenelo ezininzi zokuthelekisa i-lithium iron phosphate: ubomi bomjikelo kunye nokwandiswa kubhetele, kodwa ubushushu obuphantsi buya kuba bubude kancinci kunezinye iinkqubo zebhetri. Okwesibini, inqwelo yombane yangoku inomahluko omkhulu kakhulu kumaqondo obushushu ahlukeneyo.

Iimoto zombane ezinokubaleka iikhilomitha ezingama-160 kwiqondo lobushushu begumbi zinokuya kwi--20 degrees kuphela zibaleka iikhilomitha ezingama-60-80, kwaye ukusebenza kakuhle kucace ngakumbi. Okwesibini, ingxaki yokutshaja kweqondo lokushisa eliphantsi ebusika, kubandakanywa nzima ukuhlawula, iziganeko zokhuseleko. Kwibhetri ye-ion ye-ion ye-lithium ye-iron, i-Watma yenze uphando oluthe kratya malunga neempawu zayo zobushushu obuphantsi: enye yimpembelelo ye-electrode efanelekileyo, i-electrode ye-phosphate-positive ngokwayo yi-electron conductivity engafanelekanga, kwaye i-polarization inokuthi inyuke, inciphise. umthamo Dlala; okwesibini okubi, isibonda esibi oku kubalulekile kwintlawulo ephantsi yobushushu, kuba iya kuchaphazela imiba yokhuseleko; eyesithathu iqhekeza le-electrolyte, inokunyusa kwiqondo lokushisa eliphantsi, i-lithium ion impedance yokufuduka iya kwanda; Isine sisibophelelo, okwangoku esichaphazeleka ngakumbi kubushushu obuphantsi bebhetri.

Umbono wonke we-Watma usuka kwi-electrode elungileyo, i-electrode engalunganga, i-electro-hydraulic, kunye ne-adhesive enamaqhekeza amane obushushu obuphantsi bebhetri ye-lithium iron phosphate ion. Ngokumalunga ne-positive, ngoku i-nanomechanically, ubungakanani bayo bamasuntswana, ukuxhathisa, kunye nabavelisi be-AB planar axis baya kuchaphazela iimpawu zobushushu obuphantsi bebhetri. I-lithium lithium iron phosphate ilungiswa ngeenkqubo ezintathu.

Ukususela kwiimeko zethu zonke zokulungiselela, inkqubo ye-lithium ye-iron phosphate eyahlukileyo ye-nano-coated, sibheka kwi-axis ye-AB, i-lithium eyongeziweyo Isiteshi sokufuduka se-ion siya kuba sikhulu, esiza kunceda ukuphucula ukusebenza kwebhetri. Iinkqubo ezahlukeneyo zineempembelelo ezahlukeneyo kwi-electrode elungileyo, kunye neempawu zokukhutshwa kobushushu obuphantsi bebhetri eyenziwe yi-100 ukuya kwi-200 nano-particle diameter phosphate, enokukhulula i-94% kwi-degrees -20, eyi-particle diameter ye-nanofence efinyeza indlela. Ukufuduka, Kwakhona kuphucula ukusebenza kweqondo lokushisa eliphantsi kunye nokukhutshwa, kuba ukukhutshwa kwe-lithium phosphate kuhambelana ne-electrode efanelekileyo. Ukuqwalasela iimpawu zokutshaja kwi-electrode engalunganga, uRao Dingyi ukholelwa ukuba ukutshaja kobushushu obuphantsi kweebhetri ze-lithium-ion kubalulekile, kubandakanywa ubungakanani besuntswana lobungakanani besuntswana kunye nepitch ye-electrode engalunganga, khetha igraphite yokwenziwa ezintathu ezahlukeneyo njenge-electrode engalunganga ukuya. funda izithuba ezahlukeneyo zamaleko kunye neegranule.

Impembelelo yendlela eya kwiimpawu zeqondo lokushisa eliphantsi. Ukusuka kwizinto ezintathu, igraphite yengqolowa yomaleko inkulu, ukusuka kwi-impedance, i-impedance yomzimba kunye ne-ion impedance impedance incinci. Ngokumalunga nokushaja, uRao Shanyi ukholelwa ukuba ingxaki yokukhupha ayikho enkulu phantsi kweqondo lokushisa eliphantsi ebusika, kubalulekile ukuhlawulela ukushisa okuphantsi.

Ngenxa yokuba kwi-horizontal flow ratio, i-1C okanye i-0.5C ye-cross-flow ratio ibaluleke kakhulu, ukuya kuxinzelelo oluqhubekayo ukuba lube lude kakhulu, ngokuphucula uthelekiso lwegraphite ezintathu ezahlukeneyo, enye yazo inkulu ngokwentelekiso -20 degree ukutshaja rhoqo flow ratio Uphuculwe, ukusuka I-40% ukuya kwi-70%, ukunyuka kwezithuba zomaleko, kukho ukuhla kwe-particle size. Esi siqwenga se-electrolyte, kwi-degrees -20, -30 degrees, i-electrolyte, i-viscosity eyandisiweyo, kwaye iyancipha ukusebenza.

I-Electrolyte evela kwiinkalo ezintathu: i-solvent, ityuwa ye-lithium, i-additive. URao Dingmin uthe, “Ngovavanyo, sifumanise ukuba isinyibilikisi sichaphazela ubushushu obuphantsi bebhetri ye-lithium iron phosphate ion ukusuka kwi-70%, kukho ngaphezu kwe-90%, kukho amanqaku angaphezu kweshumi elinesibini; okwesibini, iityuwa ze-lithium ezahlukeneyo zine uphawu oluthile lwentlawulo yobushushu obuphantsi kunye nokukhutshwa.

Siyilungisile inkqubo ye-solvent kunye netyuwa ye-lithium, kwaye i-additive yokushisa ephantsi inokunyusa umthamo wokukhupha ukusuka kwi-85% ukuya kwi-90%, oko kukuthi, kuyo yonke inkqubo ye-electrolytic liquid, i-solvent, ityuwa ye-lithium, kunye nezongezo ze-lithium ion yethu yamandla. ibhetri. Kukho impembelelo ethile kwiimpawu zeqondo lokushisa eliphantsi, kubandakanywa nezinye iinkqubo eziphathekayo. "Ukunamathela, uRao Dingyi uthe kukho iintlobo ezintathu, amanqaku amabini, umgca.

Xa i-20 degree intlawulo kunye nokukhupha, amanqaku amabini mhlawumbi enze ngaphezu kwe-70 ukuya kwi-80 imijikelo, yonke i-pole yimeko yokusilela kwe-adhesive, kunye nokusetyenziswa kwezibophelelo zomgca azikho le ngxaki. Emva kwenkqubo yonke, ukusuka ekuphuculweni kwe-electrode elungileyo, i-electrode engalunganga, i-electrolyte ukuya kwi-binder, sinesiphumo esingcono kwi-lithium iron phosphate ion ibhetri monomer, enye ineempawu zokutshaja, -20, -30, - 40 idigri kwiqondo lobushushu le-0.5C ukutshaja umlinganiselo oqhubekayo wangoku ungafikelela kuma-62.

I-9%, - i-20 yokukhutshwa kweqondo lokushisa kunokukhutshwa kwi-94%, le yimpawu ezithile zokwandisa kunye nomjikelezo. Ngokubanzi, izithuthi zamandla amatsha zisebenza ngokuqhelekileyo kumntla, kungekhona nje i-monomer yebhetri enokusombulula iingxaki zokutshaja, kwaye kukho ukutsha kwe-BMS ngePakethi, kunye nokutsha kwemodeli yokuqinisekisa. Qinisekisa izithuthi zamandla amatsha kumantla obushushu obuphantsi bokusebenza okuqhelekileyo.

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