Zvinhu zvinokanganisa PACK kuburitsa simba re lithium-ion mabhatiri

lithium-ion-1

Lithium ion bhatiri PACK chigadzirwa chakakosha chinoitisa bvunzo yekushanda kwemagetsi mushure mekutarisa, kurongedza, kuunganidza uye kuungana kwesero, uye inoona kana iyo simba uye mutsauko wekumanikidza unokodzera.

Battery series-parallel monomer ndiko kuwirirana pakati pekufunga kwakakosha mubhatiri PACK, iine simba rakanaka, yakachaja nyika, senge yemukati kuramba, kuzviburitsa kuenderana kunogona kuwanikwa kutamba uye kuburitsa, cpacity yebhatiri kana kusagadzikana kwakashata kunogona kukanganisa zvakanyanya. kuita kwebhatiri rese, kunyangwe chikonzero chekuchaja kana kuburitsa izvo zvinokonzeresa dambudziko rakavanzika.Yakanaka kuumbwa nzira inzira inoshanda yekuvandudza kuenderana kwemonomer.

Lithium ion bhatiri inodzivirirwa neambient tembiricha, yakanyanya kukwira kana yakaderera tembiricha inokanganisa huwandu hwebhatiri.Hupenyu hwekutenderera kwebhatiri hunogona kukanganisa kana bhatiri rikashanda pakupisa kwakanyanya kwenguva yakareba.Kana tembiricha yakadzikira, kugona kunenge kwakaoma kutamba.Chiyero chekubuda chinoratidza kugona kwebhatiri pakuchaja uye kuburitsa panguva yakakwirira.Kana chiyero chekuburitsa chiri chidiki zvakanyanya, kumhanyisa uye kuburitsa kumhanya kunononoka, izvo zvinokanganisa kuyedza kushanda.Kana chiyero chakanyanya kukura, huwandu huchadzikiswa nekuda kweiyo polarization mhedzisiro uye thermal mhedzisiro yebhatiri, saka zvinodikanwa kusarudza chaji yakakodzera uye chiyero chekuburitsa.

1. Kuenderana kwekugadzirisa

Kurongeka kwakanaka hakugone kungovandudza chiyero chekushandiswa kwesero, asi zvakare kutonga kuenderana kwesero, inova hwaro hwekuwana yakanaka yekuburitsa kugona uye kutenderera kugadzikana kwebhatiri pack.Nekudaro, iyo dispersion degree ye AC impedance ichawedzerwa mune yekushata kwebhatiri huwandu, izvo zvinonetesa kutenderera kuita uye kuwanikwa kwebhatiri pack.Nzira yekugadzirisa bhatiri yakavakirwa pahunhu hwevheti yemabhatiri inokurudzirwa.Iyi ficha vector inoratidza kufanana pakati pechaji uye discharge voltage data yebhatiri rimwe chete uye rebhatiri rakajairwa.Iyo iri pedyo nechaji-kuburitsa curve yebhatiri kune yakajairwa curve, iyo yakakwirira kufanana kwayo, uye padyo neiyo coefficient yekubatanidza ndeye 1. Iyi nzira inonyanya kuenderana neiyo coefficient yekubatanidza yemonomer voltage, yakasanganiswa nemamwe maparameter. kuwana zvibereko zviri nani.Chinetso neiyi nzira ndeyekupa yakajairwa bhatiri chimiro vector.Nekuda kwezvimhingamipinyi zvedanho rekugadzira, panofanirwa kuve nemusiyano pakati pemaseru anogadzirwa mubatch yega yega, uye zvakanyanya kuoma kuwana chinhu chevheji chinokodzera batch yega yega.

Quantitative analysis yakashandiswa kuongorora nzira yekuongorora mutsauko pakati pemasero mamwechete.Chekutanga, mapoinzi akakosha anobata mashandiro ebhatiri akaburitswa nenzira yemasvomhu, uyezve masvomhu abstraction akaitwa kuti aone kuongororwa kwakazara uye kuenzanisa kwekuita kwebhatiri.Kuongororwa kwemhando yekushanda kwebhatiri kwakashandurwa kuita kuongororwa kwehuwandu, uye nzira inoshanda iri nyore yekugovera kwakaringana kwekuita kwebhatiri yakaiswa pamberi.Inorongedzerwa yakavakirwa pasero sarudzo seti ye yakazara performance evaluation system, ichava subjective Delphi giredhi yegrey correlation degree uye chinangwa kuyerwa, bhatiri multi-parameter grey correlation modhi inotangwa, uye kukunda imwe-sidedness ye single index seyero yekuongorora, zvishandiso. Kuongororwa kwekuita kwesimba remhando yesimba lithium ion bhatiri, Iyo dhigirii yekubatanidza yakawanikwa kubva mumhedzisiro yekuongorora inopa yakavimbika theoretical hwaro hwekupedzisira kusarudzwa uye kugoverwa kwemabhatiri.

Hunhu hwakakosha hunhu hune nzira yeboka inoenderana nekuchaja kwebhatiri uye kuburitsa curve kuti uite basa neboka, danho rayo rekuita kongiri nderekubvisa iyo nzvimbo pane curve, kutanga kugadzira chinhu vector, zvinoenderana nechero curve pakati pechinhambwe. pakati peiyo ficha yevheta yezviratidzi, nekusarudza algorithms akakodzera kuti uone kurongeka kwecurve, wobva wapedzisa bhatiri rekuita kweboka.Iyi nzira inotarisa kuchinja kwekushanda kwebhatiri mukushanda.Pahwaro hweizvi, mamwe maparamendi akakodzera anosarudzwa kuita bhatiri dhizaini, uye bhatiri rine maitiro akaenzana anogona kurongwa.

2. Kuchaja nzira

Iyo yakakodzera yekuchaja sisitimu ine mhedzisiro yakakosha pakuburitsa simba remabhatiri.Kana kudzika kwekuchaja kwakadzikira, simba rekuburitsa rinodzikira zvinoenderana.Kana kudzika kwekuchaja kwakadzikira, kemikari inoshanda zvinhu zvebhatiri zvinokanganiswa uye kukuvara kusingagadzirisike kuchakonzereswa, kuderedza huwandu uye hupenyu hwebhatiri.Naizvozvo, chiyero chakakodzera chekuchaja, yekumusoro muganho voltage uye inogara ichivharwa voltage cutoff ikozvino inofanirwa kusarudzwa kuti ive nechokwadi chekuti huwandu hwekuchaja hunogona kuwanikwa, uku uchikwenenzvera kunyatsochaja uye kuchengetedzeka uye kugadzikana.Parizvino, simba re lithium ion bhatiri rinonyanya kutora nguva dzose-yazvino - inoenderera-voltage yekuchaja mode.Nekuongorora iyo inogara-yazvino uye inogara-voltage yekuchaja mhedzisiro yelithium iron phosphate system uye ternary system mabhatiri pasi peakasiyana ekuchaja mafungu uye akasiyana cutoff voltages, zvinogona kuonekwa kuti:(1) kana iyo yekuchaja cutoff voltage iri panguva, iyo yekuchaja inowedzera, iyo inogara-yazvino chiyero inoderera, nguva yekuchaja inoderera, asi kushandiswa kwesimba kunowedzera;(2) Kana chaja yekuchaja iri panguva, nekudzikira kwechaji yekucheka-kudzima magetsi, chiyero chenguva dzose chekuchaja chinodzikira, kuchaja simba uye simba zvese zvinodzikira.Kuti ive nechokwadi chekugona kwebhatiri, iyo yekuchaja yakachekwa-kubvisa voltage ye lithium iron phosphate bhatiri haifanirwe kunge yakaderera kupfuura 3.4V.Kuti uenzanise nguva yekuchaja uye kurasikirwa kwesimba, sarudza yakakodzera kuchaja ikozvino uye yekucheka-nguva.

Kuenderana kweSOC yemonomer yega yega inonyanya kutarisisa huwandu hwekuburitsa kwebhatiri paki, uye kubhadharisa kwakaringana kunopa mukana wekuona kufanana kwekutanga SOC papuratifomu yeimwe neimwe monomer discharge, iyo inogona kuvandudza simba rekuburitsa uye kubuda zvakanaka (kuburitsa simba / kugadzirisa kugona. )Iyo balancing modhi mukuchaja inoreva kuenzanirana kwesimba lithium ion bhatiri mukuchaja.Iyo inowanzotanga kuenzanisa kana voltage yebhatiri pack inosvika kana yakakwirira kupfuura yakasetwa voltage, uye inodzivirira kuwandisa nekudzikisa kuchaja ikozvino.

Zvinoenderana nenzvimbo dzakasiyana dzemaseru ega ega mubhatiri pack, yakaringana yekuchaja yekudzora nzira yakarongwa kuti iite nekukurumidza kuchaja kwebhatiri pack uye kubvisa pesvedzero yemaseru asingaenderane ega ega pahupenyu hwekutenderera kwebhatiri paki nekugadzirisa zvakanaka kuchaja. ikozvino kwemaseru ega ega kuburikidza neyakaenzanirana yekuchaja yekudzora yedunhu modhi yebhatiri pack.Kunyanya, iyo simba rese re lithium ion bhatiri pack rinogona kuwedzerwa kune rimwe bhatiri nekuchinja masaini, kana simba rebhatiri rega rega rinogona kuchinjirwa kune yakazara bhatiri pack.Munguva yekuchaja tambo yebhatiri, iyo balancing module inotarisa voltage yebhatiri rega rega.Kana iyo voltage inosvika pane imwe kukosha, iyo balancing module inotanga kushanda.Ikozvino yekuchaja mubhatiri rimwe chete ndeye shunt kudzikisa magetsi ekuchaja, uye simba rinodzoserwa kubhazi rekuchaja kuburikidza nemodule yekushandura, kuitira kuti uwane chinangwa chekuenzanisa.

Vamwe vanhu vanoisa pamberi mhinduro yevariational kuchaja yakaenzana.Pfungwa yekuenzanisa nzira iyi ndeyokuti simba rekuwedzera chete rinopihwa kune rimwe sero rine simba rakaderera, izvo zvinodzivirira nzira yekutora simba resero rimwechete rine simba guru, iro rinorerutsa zvakanyanya topology yeequalization circuit.Kureva kuti, mareti ekuchaja akasiyana anoshandiswa kubhadharisa mabhatiri ega ega ane akasiyana masimba ematunhu kuti awane yakanaka kuenzanisa maitiro.

3. Chiyero chekubuda

Dicharge rate indekisi yakakosha kune simba mhando lithium ion bhatiri.Kuyerera kukuru kwebhatiri bvunzo yezvakanaka uye zvisina kunaka emagetsi emagetsi uye electrolyte.Kana iri lithium iron phosphate, ine chimiro chakadzikama, diki diki panguva yekuchaja uye kubuda, uye ine mamiriro ekutanga ekuyerera kukuru ikozvino, asi iyo isingafadzi ndiyo yakashata conductivity ye lithium iron phosphate.Mwero wekupararira kwelithium ion mu electrolyte chinhu chakakosha chinokanganisa kuyerera kwebhatiri, uye kupararira kweion mubhatiri kune hukama hwepedyo nechimiro uye electrolyte kuunganidzwa kwebhatiri.

Naizvozvo, mareti akasiyana ekuburitsa anotungamira kune akasiyana ekuburitsa nguva uye discharge voltage mapuratifomu emabhatiri, izvo zvinotungamira kune akasiyana ekudzimisa masimba, kunyanya kune akafanana mabhatiri.Nokudaro, chiyero chakakodzera chekubuda chinofanira kusarudzwa.Iko kunowanikwa kwebhatiri kunoderera nekuwedzera kwekuyerera ikozvino.

Jiang Cuina nezvimwewo kudzidza kuyerera kwesimbi phosphate lithium-ion bhatiri monoma inogona kuburitsa simba, pesvedzero yemhando imwe chete yemhando yekutanga kusachinja-chinja zviri nani monomer bhatiri iri mu 1 c ikozvino kuchaja kusvika 3.8 V, zvino zvakateerana ne 0.1, 0.2, 0.5, 1, 2, 3 c discharge rate yekubuda kusvika ku2.5 V, nyora hukama pakati pemagetsi uye kubuda kwemagetsi emagetsi, Ona Mufananidzo 1. Migumisiro yekuedza inoratidza kuti kusunungurwa kwe1 uye 2C ndiko 97.8% uye 96.5 % yesimba rakaburitswa reC/3, uye simba rakaburitswa i97.2% uye 94.3% yesimba rakaburitswa reC/3, zvichiteerana.Zvinogona kuonekwa kuti nekuwedzera kwekubuda kwezvino, simba rakasunungurwa uye simba rakabudiswa re lithium ion bhatiri rinoderera zvakanyanya.

Mukubuda kwemabhatiri e-lithium ion, chiyero chenyika 1C chinowanzosarudzwa, uye iyo yakanyanya kubuda ikozvino inongogumira ku2 ~ 3C.Paunenge uchibudisa nepamusoro-soro, pachava nekukwira kukuru kwekushisa uye kurasikirwa kwesimba.Naizvozvo, tarisa tembiricha yebhatiri tambo munguva chaiyo kudzivirira kukuvara kwebhatiri uye kupfupisa hupenyu hwebhatiri.

4. Tembiricha mamiriro

Kupisa kune zvakakosha pakuita kwe electrode zvinhu uye electrolyte kushanda mubhatiri.Kuwanda kwebhatiri kunokanganisa zvakanyanya nepamusoro kana kupisa kwakadzika.

Pakupisa kwakadzika, basa rebhatiri rakaderedzwa zvakanyanya, kukwanisa kunyudza uye kusunungura lithium kunoderera, kupikisa kwemukati kwebhatiri uye kuwedzera kwepolarization voltage, iyo chaiyo inowanikwa inoderedzwa, simba rekubudisa bhatiri rakaderedzwa. iyo yekuburitsa chikuva yakadzikira, bhatiri iri nyore kusvika pakubuda-kubvisa voltage, iyo inoratidzwa sezvo bhatiri inowanikwa simba inoderedzwa, bhatiri rekushandisa simba rekushandisa rinoderera.

Sezvo tembiricha ichikwira, iyo lithiamu ion inobuda uye yakanyura pakati peiyo yakanaka uye yakaipa matanda inove inoshanda, saka bhatiri kupikisa kwemukati kunoderera uye nguva yekubata inova yakareba, iyo inowedzera yemagetsi bande kufamba mudunhu rekunze uye inoita kuti kugona kuwedzere kushanda.Zvisinei, kana bhatiri ichishanda pakupisa kwepamusoro kwenguva yakareba, kugadzikana kwechimiro chakanaka chelatiti chichave chakanyanya kuipa, kuchengetedzwa kwebheteri kuchaderedzwa, uye hupenyu hwebheteri huchanyanya kupfupiswa.

Zhe Li et al.yakadzidza pesvedzero yetembiricha pane chaiyo yekuburitsa simba remabhatiri, uye yakanyora reshiyo yeiyo chaiyo yekuburitsa simba remabhatiri kune yakajairwa kubuda simba (1C kubuda pa25 ℃) patembiricha dzakasiyana.Kukodzera bhatiri shanduko yekuchinja nekushisa, tinogona kuwana: kupi: C ndiko kugona kwebhatiri;T is tembiricha;R2 ndiyo coefficient yekubatanidza yekukodzera.Mhedzisiro dzekuyedza dzinoratidza kuti bhatiri rinowora nekukurumidza pane yakaderera tembiricha, asi rinowedzera nekuwedzera kwekushisa pakamuri tembiricha.Kugona kwebhatiri pa -40 ℃ inongova chikamu chimwe muzvitatu chemutengo wezita, nepo pa 0 ℃ kusvika 60 ℃, kugona kwebhatiri kunokwira kubva pa80 muzana yezita rekuita kusvika kuzana muzana.

Kuongorora kunoratidza kuti chiyero chekuchinja kwe ohmic resistance pane yakadzika tembiricha yakakura kudarika iyo pakushisa kwepamusoro, iyo inoratidza kuti kutonhora kwakadzika kune simba guru pane basa rebhatiri, nokudaro kukanganisa bhatiri inogona kusunungurwa.Nekuwedzera kwekushisa, iyo ohmic kuramba uye polarization kuramba yekuchaja uye yekuburitsa maitiro inodzikira.Zvisinei, pakupisa kwepamusoro, kemikari inogadzirisa chiyero uye kugadzikana kwezvinhu mubhatiri zvichaparadzwa, zvichiita kuti zvigone kuitika, izvo zvichakanganisa kukwanisa uye mukati mekudzivirira kwebhatiri, zvichiita kuti hupenyu hupfupike uye kunyange kuderedza kuchengeteka.

Naizvozvo, zvese zviri zviviri tembiricha yakakwira uye yakaderera tembiricha zvinokanganisa mashandiro uye hupenyu hwesevhisi ye lithium iron phosphate bhatiri.Muchiito chaicho chekushanda, nzira nyowani dzakadai sebhatiri thermal management dzinofanirwa kutorwa kuti ive nechokwadi chekuti bhatiri rinoshanda panguva yakakodzera tembiricha.Kamuri yekuyedza tembiricha ye25 ℃ inogona kugadzwa mubhatiri PACK test link.

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Nguva yekutumira: Feb-21-2022