I-TianJinlishen, i-Guoxuan Hi-Tech namanye amaqembu azuze ucwaningo nokuthuthukiswa kwamabhethri anamandla angu-300 Wh/kg. Ngaphezu kwalokho, kusenenani elikhulu lamayunithi enza umsebenzi ohlobene nentuthuko nocwaningo.

Ukwakheka kwamabhethri e-lithium-ion okupakisha aguquguqukayo ngokuvamile kuhlanganisa ama-electrode amahle, ama-electrode angalungile, izihlukanisi, ama-electrolyte, nezinye izinto ezidingekayo ezisizayo, njengamathebhu, amateyipu, namapulasitiki e-aluminium. Ngokwezidingo zengxoxo, umbhali waleli phepha uhlukanisa izinto ezisebhethri ye-lithium-ion ye-soft-pack zibe izigaba ezimbili: inhlanganisela ye-pole piece unit kanye nezinto ezingenayo amandla. Iyunithi yocezu lwesigxobo ibhekisela ku-electrode ephozithivu kanye ne-electrode eyinegethivu, nawo wonke ama-electrode aqondile kanye I-electrode eyinegethivu ingabhekwa njengenhlanganisela yamayunithi ocezu lwesigxobo akhiwe amayunithi amaningana esiqephu sesigxobo; izinto zamandla ezingafaki sandla zibhekisela kuzo zonke ezinye izinto ngaphandle kwenhlanganisela yamayunithi ocezu lwesigxobo, njengama-diaphragm, ama-electrolyte, izigxobo zezigxobo, amapulasitiki e-aluminium, amateyipu okuvikela kanye nokuqedwa. itheyipi njll. Okwejwayelekile i-LiMO 2 (M = Co, Ni kanye ne-Ni-Co-Mn, njll.)/carbon system Amabhethri e-Li-ion, inhlanganisela yamayunithi ocezu lwesigxobo inquma umthamo namandla ebhethri.

Njengamanje, ukuze kuzuzwe umgomo ongu-300Wh/kg wamandla akhethekile webhethri, izindlela eziyinhloko zifaka:

(1) Khetha isistimu yezinto eziphezulu zomthamo, i-electrode ekhangayo yenziwe nge-nickel ternary ephezulu, futhi i-electrode engalungile yenziwe nge-silicon carbon;

(2) Dizayina i-electrolyte ene-voltage ephezulu ukuze uthuthukise i-voltage yokunqamula ukushaja;

(3) Lungiselela ukwakhiwa kwe-electrode slurry enhle nengalungile futhi ukwandise ingxenye yezinto ezisebenzayo ku-electrode;

(4) Sebenzisa ucwecwe lwethusi oluncane oluncane kanye nocwecwe lwe-aluminium ukuze unciphise inani labaqoqi bamanje;

(5) Khulisa inani lokumboza lama-electrode alungile noma angalungile, futhi wandise ingxenye yezinto ezisebenzayo kuma-electrode;

(6) Lawula inani le-electrolyte, wehlise inani le-electrolyte futhi wandise amandla athile amabhethri e-lithium-ion;

(7) Lungiselela ukwakheka kwebhethri futhi unciphise ingxenye yamathebhu nezinto zokupakisha ebhethrini.

Phakathi kwezinhlobo ezintathu zebhethri ye-cylindrical, igobolondo eliqinile eliyisikwele kanye neshidi le-soft-pack laminated, ibhethri le-soft-pack linezici zedizayini eguquguqukayo, isisindo esilula, ukumelana okuphansi kwangaphakathi, akulula ukuqhuma, nemijikelezo eminingi, namandla athile. ukusebenza kwebhethri nakho kuvelele. Ngakho-ke, ibhethri ye-laminated soft-pack ye-lithium-ion iyisihloko socwaningo esishisayo okwamanje. Enqubweni yokuklama imodeli yebhethri ye-laminated soft-pack ye-lithium-ion, okuguquguqukayo okuyinhloko kungahlukaniswa ngezici eziyisithupha ezilandelayo. Ezokuqala ezintathu zingabhekwa njengezinqunywa izinga lesistimu ye-electrochemical kanye nemithetho yokuklama, kanti ezintathu zokugcina ngokuvamile ziyi-design model. okuguquguqukayo kwentshisekelo.

(1) Izinto zokwakha kanye nokubunjwa kwama-electrode okuhle nokubi;

(2) Ukuminyana kokuqina kwama-electrode aqondile noma angalungile;

(3) Isilinganiso somthamo we-electrode ongemuhle (N) kuya kumthamo we-electrode omuhle (P) (N/P);

(4) Inani lamayunithi ocezu lwesigxobo (elilingana nenani lezingcezu zezigxobo eziphozithivu);

(5) Inani lokumboza i-electrode Positive (ngokwesisekelo sokunqunywa kwe-N/P, qala ngokunquma inani le-electrode elihle lokunamathela, bese unquma inani elibi le-electrode enamathelayo);

(6) Indawo enohlangothi olulodwa lwe-electrode eyodwa ephozithivu (enqunywa ubude nobubanzi be-electrode eqondile, lapho kunqunywa ubude nobubanzi be-electrode eqondile, ubukhulu be-electrode eyinegethikhi nayo iyanqunywa, futhi ubukhulu beseli bunganqunywa).

Okokuqala, ngokusho kwezincwadi [1], ithonya lenani lamayunithi esiqephu se-pole, inani le-electrode enamathelayo kanye nendawo yohlangothi olulodwa lwesiqephu esisodwa se-electrode enhle kumandla athile namandla ibhethri kuyaxoxwa. Amandla athile (ES) ebhethri angavezwa ngesibalo (1).

isithombe

Kufomula (1): x inombolo yama-electrode aqukethwe kubhethri; y inani lokumboza le-electrode enhle, kg/m2; z indawo enohlangothi olulodwa lwe-electrode eyodwa, i-m2; xN*, y > 0, z > 0; U-e(y, z) amandla iyunithi yocezu lwesigxobo enganikela ngayo, Wh, ifomula yokubala iboniswa kufomula (2).

isithombe

Kwifomula (2): I-DAV iyi-voltage yokukhipha eyisilinganiso, V; I-PC isilinganiso sesisindo sento esebenzayo ye-electrode enenani eliphelele le-electrode esebenzayo esebenzayo kanye ne-ejenti eqhubayo ne-binder, %; I-SCC umthamo othize wezinto ezisebenzayo ze-electrode, Ah / kg; m(y, z) yisisindo seyunithi yocezu lwesigxobo, kg, futhi ifomula yokubala iboniswa kufomula (3).

isithombe

Kufomula (3): I-KCT isilinganiso sengqikithi yendawo ye-electrode eqondile ye-monolithic (isamba sendawo yokumboza kanye nendawo yephepha lethebhu) endaweni enohlangothi olulodwa lwe-electrode eqondile ye-monolithic, futhi okukhulu kuno-1; I-Tal ubukhulu bomqoqi wamanje we-aluminium, m; ρAl ukuminyana komqoqi wamanje we-aluminium, kg/m3; I-KA isilinganiso sengqikithi yendawo ye-electrode enegethivu ngayinye endaweni enohlangothi olulodwa lwe-electrode eyodwa ephozithivu, futhi inkulu kuno-1; I-TCu ubukhulu bomqoqi wamanje wethusi, m; I-ρCu ingumqoqi wamanje wethusi. Ukuminyana, kg/m3; I-N/P isilinganiso somthamo we-electrode ongemuhle kumthamo we-electrode omuhle; I-PA isilinganiso se-electrode eyinegethivu yesisindo esisebenzayo nesamba sengqikithi ye-electrode eyinegethivu esebenzayo kanye ne-ejenti eqhubayo ne-binder, %; I-SCA yisilinganiso se-electrode esebenzayo esebenzayo Umthamo, Ah/kg. U-M(x, y, z) yisisindo somkhiqizo onganawo amandla, kg, ifomula yokubala iboniswa kufomula (4)

isithombe

Kufomula (4): i-kAP isilinganiso sendawo ye-aluminium-plastic endaweni enohlangothi olulodwa lwe-electrode eyodwa ephozithivu, futhi inkulu kuno-1; I-SDAP ukuminyana kwendawo kwe-aluminium-plastic, kg/m2; I-mTab yisamba esiphelele sama-electrode aqondile noma angalungile, angabonwa kuwo ngokungaguquki; I-mTape iyinani eliphelele le-tape, elingathathwa njengento engaguquki; I-kS isilinganiso sengqikithi yendawo yesihlukanisi endaweni ephelele yeshidi le-electrode ephozithivu, futhi likhulu kuno-1; I-SDS ukuminyana kwendawo yesihlukanisi, kg/m2; I-kE isisindo se-electrolyte nebhethri Isilinganiso somthamo, i-coefficient inombolo ephozithivu. Ngokwalokhu, kungaphethwa ngokuthi ukwanda kwanoma iyiphi into eyodwa ka-x, y kanye no-z kuzokwandisa amandla athile ebhethri.

Ukuze kufundwe ukubaluleka kwethonya lenani lamayunithi ocezu lwesigxobo, inani lokumboza le-electrode eqondile kanye nendawo enohlangothi olulodwa lwe-electrode eyodwa eqondile kumandla athile kanye nokuminyana kwamandla ebhethri, i-electrochemical. isistimu nemithetho yokuklama (okungukuthi, ukunquma impahla ye-electrode kanye nefomula, Ukuminyana kwe-Compaction kanye ne-N/P, njll.), bese kuhlanganisa ngokwe-orthogonally izinga ngalinye lezici ezintathu, njengenani lamayunithi ocezu lwesigxobo, inani i-electrode enhle, kanye nendawo enohlangothi olulodwa lwengxenye eyodwa ye-electrode eqondile, ukuqhathanisa impahla ye-electrode enqunywe iqembu elithile futhi ukuhlaziywa kwe-Range kwenziwa kubaliwe amandla athile kanye nokuminyana kwamandla kwebhethri ngokusekelwe ifomula, ukuminyana okuhlanganisiwe kanye ne-N/P. Idizayini ye-orthogonal kanye nemiphumela yokubala ikhonjiswe kuThebula 1. Imiphumela yedizayini ye-orthogonal yahlaziywa kusetshenziswa indlela yobubanzi, futhi imiphumela ikhonjiswe kuMfanekiso 1. Ukuminyana okuthile kwamandla kanye namandla ebhethri kukhuphuka ngokulinganayo ngenani lamayunithi esiqephu sesigxobo. , inani lokumbozwa kwe-electrode ephozithivu, kanye nendawo enohlangothi olulodwa lwe-electrode eqondile yocezu olulodwa. Phakathi kwezinto ezintathu zenani lamayunithi ocezu lwesigxobo, inani le-electrode enamathelayo, kanye nendawo enohlangothi olulodwa lwe-electrode eyodwa eqondile, inani le-electrode enamathelayo linomthelela obaluleke kakhulu kumandla athile we-electrode. ibhethri; Phakathi kwezinto ezintathu zendawo ehlangothini olulodwa, indawo enohlangothi olulodwa lwe-monolithic cathode inomthelela obaluleke kakhulu kubuningi bamandla ebhethri.

isithombe

isithombe

Kungabonakala kuMfanekiso 1a ukuthi amandla athile ebhethri akhuphuka ngokulinganayo ngenani lamayunithi ocezu lwesigxobo, inani le-cathode coating, kanye nendawo enohlangothi olulodwa lwe-single-piece cathode, eqinisekisa ukulunga ukuhlaziya ithiyori engxenyeni edlule; into ebaluleke kakhulu ethinta amandla athile ebhethri inani le-Positive coating. Kungabonakala kuMfanekiso 1b ukuthi ukuminyana kwamandla ebhethri kukhuphuka ngokulinganayo ngenani lamayunithi ocezu lwesigxobo, inani le-electrode enamathelayo, kanye nendawo enohlangothi olulodwa lwe-electrode eyodwa, eqinisekisa futhi ukulunga. kohlaziyo lwangaphambili lwetiyori; into ebaluleke kakhulu ethinta ukuminyana kwamandla ebhethri indawo enohlangothi olulodwa lwe-monolithic positive electrode. Ngokusho kokuhlaziywa okungenhla, ukuze kuthuthukiswe amandla athile ebhethri, kuyisihluthulelo sokwandisa inani le-electrode coating elihle ngangokunokwenzeka. Ngemva kokunquma umkhawulo ophezulu owamukelekayo yenani lokuhlanganisa i-electrode elihle, lungisa amaleveli esici esisele ukuze ufeze izidingo zekhasimende; Ngokuminyana kwamandla ebhethri, kuwukhiye wokukhulisa indawo enohlangothi olulodwa lwe-monolithic positive electrode ngangokunokwenzeka. Ngemva kokunquma umkhawulo ophezulu owamukelekayo wendawo yohlangothi olulodwa lwe-electrode eqondile ye-monolithic, lungisa amaleveli esici esisele ukuze uhlangabezane nezidingo zekhasimende.

Ngokwalokhu, kungaphethwa ngokuthi amandla athile namandla ebhethri akhuphuka ngokulinganayo ngenani lamayunithi ocezu lwesigxobo, inani le-electrode enamathelayo, kanye nendawo enohlangothi olulodwa lwe-electrode eyodwa. Phakathi kwezinto ezintathu zenani lamayunithi ocezu lwesigxobo, inani le-electrode enamathelayo, kanye nendawo enohlangothi olulodwa lwe-electrode eyodwa eqondile, umthelela wenani le-electrode enamathelayo kumandla athile ebhethri okubaluleke kakhulu; Phakathi kwezinto ezintathu zendawo ehlangothini olulodwa, indawo enohlangothi olulodwa lwe-monolithic cathode inomthelela obaluleke kakhulu kubuningi bamandla ebhethri.

Khona-ke, ngokusho kwezincwadi [2], kuxoxwa ngendlela yokunciphisa ikhwalithi yebhethri uma kuphela umthamo webhethri odingekayo, futhi usayizi webhethri nezinye izinkomba zokusebenza azidingeki ngaphansi kwesistimu yezinto ezibonakalayo enqunyiwe kanye nokucubungula ubuchwepheshe. izinga. Isibalo sekhwalithi yebhethri nenani lamapuleti avumayo kanye ne-aspect ratio yamapuleti aqondile njengokuguquguqukayo okuzimele kuboniswa kufomula (5).

isithombe

Kufomula (5), M(x, y) iyisamba sesisindo sebhethri; x inombolo yamapuleti ebhethri; y isilinganiso sesici samapuleti amahle (inani layo lilingana nobubanzi obuhlukaniswe ubude, njengoba kuboniswe kuMfanekiso 2); I-k1, i-k2, i-k3, i-k4, i-k5, i-k6, i-k7 ama-coefficients, futhi amanani awo anqunywa amapharamitha angu-26 ahlobene nomthamo webhethri, isistimu yezinto ezibonakalayo kanye nezinga lobuchwepheshe bokucubungula, bheka Ithebula 2. Ngemva kokunqunywa kwamapharamitha kuThebula 2 , i-coefficient ngayinye Kube sekunqunywa ukuthi ubudlelwano phakathi kwamapharamitha angu-26 kanye ne-k1, k2, k3, k4, k5, k6, ne-k7 kulula kakhulu, kodwa inqubo yokukhipha inzima kakhulu. Ngokuthola isimemezelo ngokwezibalo (5), ngokulungisa inani lamapuleti avumayo kanye ne-aspect ratio yamapuleti avumayo, ubuncane bekhwalithi yebhethri engazuzwa ngedizayini yemodeli ingatholwa.

isithombe

Umfanekiso 2 Umdwebo ohleliwe wobude nobubanzi bebhethri elakhiwe nge-laminated

Ithebula 2 Amapharamitha wokuklama amaseli ane-laminated

isithombe

Kuthebula 2, inani elithile liyinani langempela lepharamitha yebhethri elinomthamo ongu-50.3Ah. Amapharamitha afanelekile anquma ukuthi i-k1, i-k2, i-k3, i-k4, i-k5, i-k6, ne-k7 ingu-0.041, 0.680, 0.619, 13.953, 8.261, 639.554, 921.609 ngokulandelanayo. , x yi-21, y ingu-1.97006 (ububanzi be-electrode eqondile yi-329 mln, futhi ubude buyi-167 mm). Ngemva kokwenza kahle, lapho inombolo ye-electrode ephozithivu ingu-51, ikhwalithi yebhethri incane kakhulu.