I-TianJinlishen, i-Guoxuan Hi-Tech kunye namanye amaqela aphumelele uphando kunye nophuhliso lwe-300 Wh / kg iibhetri zamandla. Ukongeza, kusekho inani elikhulu leeyunithi eziqhuba umsebenzi onxulumene nophuhliso kunye nophando.

Ukubunjwa kweebhetri ze-lithium-ion zokupakisha ngokuqhelekileyo ziquka i-electrodes efanelekileyo, i-electrodes engalunganga, i-separators, i-electrolytes, kunye nezinye izinto eziyimfuneko ezincedisayo, ezifana neethebhu, iiteyipu, kunye neeplastiki ze-aluminium. Ngokweemfuno zengxoxo, umbhali weli phepha uhlula izinto kwi-soft-pack ye-lithium-ion ibhetri kwiindidi ezimbini: ukudibanisa kweyunithi yesiqhekeza kunye nezinto ezingenayo amandla. Iyunithi yesiqwenga sepali ibhekiselele kwi-electrode ephozithisiweyo kunye ne-electrode ekhabayo, kunye nazo zonke ii-electrode ezilungileyo kunye ne-electrode engakhiyo inokuthathwa njengendibaniselwano yeeyunithi zesiqwenga sepali ezenziwe ngeeyunithi ezininzi zeepali; izinto zamandla ezingafaki galelo zibhekisa kuzo zonke ezinye izinto ngaphandle kwendibaniselwano yeeyunithi zesiqwenga sepali, ezinje nge-diaphragm, i-electrolytes, i-pole lugs, iiplastiki ze-aluminiyam, iiteyiphu zokukhusela kunye nokupheliswa. i-tape njl. Kwi-LiMO 2 eqhelekileyo (M = Co, i-Ni kunye ne-Ni-Co-Mn, njl.)/inkqubo yekhabhoni Iibhetri ze-Li-ion, udibaniso lweeyunithi zesiqwenga se-pole sinquma umthamo kunye namandla ebhetri.

Okwangoku, ukuze ufezekise injongo ye-300Wh/kg yobunzima bebhetri amandla athile, iindlela eziphambili ziquka:

(1) Khetha inkqubo yezinto eziphathekayo eziphezulu, i-electrode efanelekileyo yenziwe nge-nickel ternary ephezulu, kunye ne-electrode engafanelekanga yenziwe nge-silicon carbon;

(2) Yila i-electrolyte ephezulu yokuphucula i-voltage cut-off voltage;

(3) Ukwandisa ukuqulunqwa kwe-electrode slurry efanelekileyo kunye ne-negative kunye nokwandisa umlinganiselo wezinto ezisebenzayo kwi-electrode;

(4) Sebenzisa i-foil yobhedu encinci kunye ne-aluminium foil ukunciphisa umlinganiselo wabaqokeleli bangoku;

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(6) Lawula ubungakanani be-electrolyte, ukunciphisa inani le-electrolyte kunye nokwandisa amandla athile eebhetri ze-lithium-ion;

(7) Lungiselela ubume bebhetri kwaye unciphise ubungakanani beethebhu kunye nezinto zokupakisha ebhetrini.

Phakathi kweefom ezintathu zebhetri ze-cylindrical, i-square hard shell kunye ne-soft-pack laminated sheet, ibhetri ye-soft-pack ineempawu zoyilo oluguquguqukayo, ubunzima obulula, ukuchasana okuphantsi kwangaphakathi, akukho lula ukuqhuma, kunye nemijikelezo emininzi, kunye namandla athile. ukusebenza kwebhetri nako kubalaseleyo. Ke ngoko, i-laminated soft-pack power lithium-ion ibhetri sisihloko sophando esishushu ngoku. Kwinkqubo yoyilo lwemodeli ye-laminated soft-pack power lithium-ion ibhetri, izinto eziguquguqukayo eziphambili zinokwahlulwa zibe yimiba emithandathu elandelayo. Ezokuqala ezintathu zinokuthi ziqwalaselwe kwinqanaba lenkqubo ye-electrochemical kunye nemithetho yoyilo, kwaye ezintathu zokugqibela zihlala ziyimodeli yoyilo. ezahlukeneyo zomdla.

(1) Izinto ezilungileyo kunye nezingalunganga ze-electrode kunye nokwakheka;

(2) Uxinaniso lokuxinana kwee-electrode ezintle kunye nezingalunganga;

(3) Umlinganiselo womthamo we-electrode negative (N) ukuya kumandla ombane ofanelekileyo (P) (N / P);

(4) Inani leeyunithi zepali (ezilingana nenani leepali ezichanekileyo);

(5) Isixa se-electrode esilungileyo (ngokwesiseko sokuzimisela kwe-N / P, okokuqala sinqume inani le-electrode efanelekileyo yokwaleka, kwaye emva koko unqume inani le-electrode elibi);

(6) Indawo enecala elinye le-electrode echanekileyo (emiselwe bubude nobubanzi be-electrode elungileyo, xa ubude nobubanzi be-electrode elungileyo kumiselwa, ubungakanani be-electrode engalunganga nayo imiselwe, kwaye ubungakanani beseli bunokumiselwa).

Okokuqala, ngokoncwadi [1], impembelelo yenani leeyunithi zesiqwenga sepali, isixa se-electrode efanelekileyo yokwaleka kunye nendawo enecala elinye leqhekeza elinye le-electrode elungileyo kumandla athile kunye noxinzelelo lwamandla ombane. ibhetri iyaxoxwa. Amandla athile (ES) ebhetri angabonakaliswa nge-equation (1).

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Kwifomula (1): x linani lee-electrode eziphozithivu eziqulethwe ebhetrini; y yimali yokugubungela i-electrode efanelekileyo, kg / m2; z yindawo enecala elinye ye-electrode eyodwa, i-m2; xN*, y > 0, z > 0; i-e(y, z) ngamandla iyunithi yesiqwenga sepali enokuba negalelo, Wh, ifomula yokubala iboniswe kwifomula (2).

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Kwifomula (2): I-DAV yi-voltage yokukhupha i-avareji, i-V; I-PC ngumlinganiselo wobunzima be-electrode esebenzayo imathiriyeli kubunzima bubonke be-electrode esebenzayo imathiriyeli kunye ne-agent eqhubayo kunye ne-binder, %; I-SCC ngumthamo othile wezinto ezisebenzayo ze-electrode, Ah / kg; m(y, z) bubunzima beyunithi yeqhekeza lepali, kg, kwaye ifomyula yokubala iboniswe kwifomula (3).

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Kwifomula (3): I-KCT ngumlinganiselo wendawo eyonke ye-electrode echanekileyo ye-monolithic (isimbuku sendawo yokugquma kunye nommandla wefoyile yethebhu) ukuya kwindawo enecala elinye le-electrode elungileyo ye-monolithic, kwaye mkhulu kuno-1; I-Tal bubunzima bomqokeleli wangoku we-aluminium, m; ρAl bubuninzi bomqokeleli wangoku we-aluminiyam, kg/m3; I-KA ngumlinganiselo wendawo yonke ye-electrode engalunganga kwindawo enye ye-electrode enye, kwaye inkulu kuno-1; I-TCu bubunzima bomqokeleli wangoku wobhedu, m; ρCu ngumqokeleli wangoku wobhedu. Ukuxinana, kg/m3; I-N/P ngumlinganiselo womthamo we-electrode ongalunganga ukuya kumthamo we-electrode elungileyo; I-PA yireyishini ye-electrode engasebenziyo ubunzima bezinto ezisebenzayo ukuya kubunzima bubonke be-electrode negative esebenzayo imathiriyeli kunye ne-ejenti yokuqhuba kunye nesibophelelo, %; I-SCA yireyishini ye-electrode negative esebenzayo imathiriyeli Umthamo, Ah/kg. M(x, y, z) bubunzima bezinto ezingaba negalelo lamandla, kg, ifomula yokubala iboniswe kwifomula (4)

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Kwifomula (4): i-kAP ngumlinganiselo wendawo ye-aluminiyam-yeplastiki ukuya kwindawo enecala elinye le-electrode eyodwa echanekileyo, kwaye inkulu kuno-1; I-SDAP yingxinano yendawo ye-aluminium-plastiki, kg / m2; I-mTab bubunzima obupheleleyo bee-electrode ezilungileyo kunye nezingalunganga, ezinokubonwa ngokuqhubekayo; I-mTape bubunzima obupheleleyo beteyiphu, enokuthathwa njengento eqhubekayo; I-kS ngumlinganiselo wendawo epheleleyo yesahluli kwindawo epheleleyo yephepha le-electrode echanekileyo, kwaye inkulu kuno-1; I-SDS yingxinano yendawo yesahluli, kg/m2; I-kE bubunzima be-electrolyte kunye nebhetri Umlinganiselo womthamo, i-coefficient linani eli-positive. Ngokwale nto, kunokugqitywa ukuba ukunyuka kwayo nayiphi na into enye ye-x, y kunye ne-z kuya kwandisa amandla athile ebhetri.

Ukuze ufunde ngokubaluleka kwempembelelo yenani leeyunithi zesiqwenga sepali, isixa sokugquma se-electrode elungileyo kunye nendawo enecala elinye le-electrode elungileyo kumandla athile kunye noxinzelelo lwamandla ebhetri, i-electrochemical. inkqubo kunye nemithetho yoyilo (oko kukuthi, ukumisela imathiriyeli ye-electrode kunye nefomula, Uxinaniso lweCompaction kunye ne-N / P, njl.), kwaye emva koko udibanise ngokwe-orthogonally kwinqanaba ngalinye lezinto ezintathu, njengenani leeyunithi zesiqhekeza, inani leeyunithi. Ukugquma kwe-electrode elungileyo, kunye nendawo enecala elinye leqhekeza elinye le-electrode elungileyo, ukuthelekisa imathiriyeli ye-electrode egqitywe liqela elithile kwaye uhlalutyo lweRange lwenziwa kubalwa amandla athile kunye noxinzelelo lwamandla ebhetri esekwe ifomula, ingxinano edibeneyo kunye ne-N/P. Uyilo lwe-orthogonal kunye neziphumo zokubala ziboniswe kwiThebhile 1. Iziphumo zoyilo lwe-orthogonal zahlaziywa kusetyenziswa indlela yoluhlu, kwaye iziphumo ziboniswe kuMzobo 1. Amandla athile kunye noxinzelelo lwamandla ebhetri anyuka nge-monotonically kunye nenani leeyunithi zesiqhekeza. , ubungakanani bokugquma kwe-electrode elungileyo, kunye nendawo enecala elinye le-electrode eneqhekeza elinye. Phakathi kwezinto ezintathu yenani leeyunithi zesiqwenga sepali, ubungakanani bokugquma kwe-electrode eqinisekileyo, kunye nendawo enecala elinye le-electrode entle, ubungakanani bokugquma kwe-electrode enempembelelo enkulu kumandla athile ombane. ibhetri Phakathi kwezinto ezintathu zendawo enecala elinye, indawo enecala elinye le-monolithic cathode inempembelelo enkulu kubuninzi bamandla ebhetri.

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Inokubonwa kuMzobo 1a ukuba amandla athile ebhetri ayanda ngokwahlukileyo ngenani leeyunithi zesiqwenga sepali, ubungakanani bokugquma kwecathode, kunye nendawo enecala elinye lecathode yesiqwenga esinye, esiqinisekisa ukuchaneka kwe-cathode. uhlalutyo lwethiyori kwicandelo elingaphambili; eyona nto ibalulekileyo echaphazela amandla athile ebhetri sisixa sePositive coating. Inokubonwa kuMfanekiso 1b ukuba uxinano lwamandla ebhetri lonyuka ngokwahlukileyo ngenani leeyunithi zesiqwenga sepali, isixa sokutyabeka kwe-electrode elungileyo, kunye nendawo enecala elinye le-electrode eyodwa, ekwaqinisekisa ukuchaneka. kuhlalutyo lwethiyori yangaphambili; eyona nto ibalulekileyo echaphazela ukuxinana kwamandla ebhetri yindawo enecala elinye le-monolithic positive electrode. Ngokutsho kolu hlalutyo lungentla, ukwenzela ukuba kuphuculwe amandla athile ebhetri, kuyisitshixo sokwandisa inani le-electrode efanelekileyo yokugqoka kangangoko kunokwenzeka. Emva kokumisela umda ophezulu owamkelekileyo wexabiso le-electrode coating value, lungisa amanqanaba aseleyo ukuze ufezekise iimfuno zomthengi; Kuxinzelelo lwamandla ebhetri, sisitshixo sokunyusa indawo enecala elinye le-monolithic positive electrode kangangoko kunokwenzeka. Emva kokumisela umda ophezulu owamkelekileyo wendawo yecala elinye le-electrode ye-monolithic positive, lungisa amanqanaba aseleyo ukuze uhlangabezane neemfuno zomthengi.

Ngokwale nto, kunokugqitywa ukuba amandla athile kunye noxinzelelo lwamandla ebhetri lonyuka ngokwahlukileyo ngenani leeyunithi zesiqwenga sepali, isixa sokutyabeka kwe-electrode elungileyo, kunye nendawo enecala elinye le-electrode entle. Phakathi kwezinto ezintathu yenani leeyunithi zesiqwenga sepali, ubungakanani bokugquma kwe-electrode eqinisekileyo, kunye nendawo enecala elinye le-electrode entle, ifuthe lomthamo we-electrode entle kumandla athile ebhetri. eyona ibalulekileyo; Phakathi kwezinto ezintathu zendawo enecala elinye, indawo enecala elinye le-monolithic cathode inempembelelo enkulu kubuninzi bamandla ebhetri.

Emva koko, ngokutsho koncwadi [2], kuxoxwa ngendlela yokunciphisa umgangatho webhetri xa kuphela umthamo webhetri efunekayo, kunye nobukhulu bebhetri kunye nezinye izikhombisi zokusebenza azifunwa phantsi kwenkqubo yezinto eziphathekayo kunye neteknoloji yokucubungula. inqanaba. Ukubalwa komgangatho webhetri kunye nenani leepleyiti ezintle kunye nomlinganiso we-aspect ratio yeepleyiti ezintle njengeziguquguquko ezizimeleyo ziboniswa kwifomula (5).

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Kwifomula (5), M(x, y) bubunzima bubonke bebhetri; x linani leepleyiti eziphozithivu kwibhetri; y ngumlinganiselo wecala lamacwecwe afanelekileyo (ixabiso layo lilingana nobubanzi obuhlulwe ngobude, njengoko kuboniswe kuMfanekiso 2); k1, k2, k3, k4, k5, k6, k7 zi-coefficients, kwaye ixabiso labo lichongwa ngama-26 parameters ezinxulumene nomthamo webhetri, inkqubo yezinto eziphathekayo kunye nenqanaba lobuchwepheshe bokucubungula, jonga iTheyibhile 2. Emva kokuba iiparameters kwiThebhile 2 zichongiwe. , i-coefficient nganye Kuye kunqunywe ukuba ubudlelwane phakathi kwee-parameters ezingama-26 kunye ne-k1, k2, k3, k4, k5, k6, kunye ne-k7 ilula kakhulu, kodwa inkqubo yokuphuma inzima kakhulu. Ngokufumana isibhengezo semathematika (5), ngokulungelelanisa inani leepleyiti ezintle kunye nomlinganiselo we-aspect ratio yeepleyiti ezintle, ubuncinci bexabiso lebhetri obunokufezekiswa ngoyilo lomzekelo unokufumaneka.

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Umfanekiso 2 Umzobo weSchematic wobude nobubanzi bebhetri elaminethiweyo

Itheyibhile 2 Iiparamitha zoyilo lweeseli eziLaminated

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KwiThebhile 2, ixabiso elithile lilona xabiso leparameter yebhetri enomthamo we-50.3Ah. Iiparamitha ezifanelekileyo zimisela ukuba i-k1, i-k2, i-k3, i-k4, i-k5, i-k6, i-k7 yi-0.041, 0.680, 0.619, 13.953, 8.261, 639.554, 921.609 ngokulandelelanayo. , x ngu-21, y ngu-1.97006 (ububanzi be-electrode echanekileyo yi-329 mln, kwaye ubude bu-167 mm). Emva kokulungelelaniswa, xa inani le-electrode elungileyo lingama-51, umgangatho webhetri ngowona umncinci.