Ukulinganisa Kweseli Kunweba Kanjani Impilo Yephakethe Lebhethri le-LifePo4?

Lapho amadivaysi edinga okuhlala isikhathi eside, ukusebenza okuphezuluIphakethe lebhethri le-LifePo4, kudingeka balinganisele ingqamuzana ngalinye. Kungani iphakethe lebhethri le-LifePo4 lidinga ukulinganisa kwebhethri? Amabhethri e-LifePo4 angaphansi kwezimpawu eziningi ezinjengokugcwala ngokweqile, ukungasebenzi kwamandla kagesi, ukushajwa ngokweqile kanye nokukhipha amandla, ukubaleka okushisayo nokungalingani kwamandla ebhethri. Esinye sezici ezibaluleke kakhulu ukungalingani kweseli, okushintsha amandla kagesi eseli ngalinye ephaketheni ngokuhamba kwesikhathi, ngaleyo ndlela kuncipha ngokushesha umthamo webhethri. Uma iphakethe lebhethri le-LifePo4 lidizayinelwe ukusebenzisa amaseli amaningi ochungechungeni, kubalulekile ukuklama izici zikagesi ukuze ulinganisele ama-voltage eseli ngokuqhubekayo. Lokhu akukona nje ukusebenza kwephakethe lebhethri, kodwa futhi nokuthuthukisa umjikelezo wempilo. Isidingo semfundiso ukuthi ukulinganisa kwebhethri kwenzeka ngaphambi nangemva kokwakhiwa kwebhethri futhi kufanele kwenziwe kuwo wonke umjikelezo wempilo yebhethri ukuze kugcinwe ukusebenza kwebhethri okuphelele! Ukusetshenziswa kokulinganisa kwebhethri kusivumela ukuthi sidizayine amabhethri anamandla aphezulu wohlelo lokusebenza ngoba ukulinganisa kuvumela ibhethri ukuthi lifinyelele esimweni esiphezulu sokushaja (i-SOC). Ungacabanga uxhuma amayunithi amaningi e-LifePo4 Cell ochungechungeni njengokungathi udonsa isihlibhi ngezinja eziningi zesihlibhi. Isihlibhi singadonswa kuphela ngokusebenza kahle okukhulu uma zonke izinja eziyisihlibhi zigijima ngesivinini esifanayo. Ngezinja ezine ezihlihliwe, uma inja eyodwa yesihlibhi igijima kancane, khona-ke ezinye izinja ezintathu zesihlibhi kufanele nazo zinciphise isivinini sazo, ngaleyo ndlela zinciphise ukusebenza kahle, futhi uma inja eyodwa enesihlibhi igijima ngokushesha, izogcina idonsa umthwalo wezinye izinja ezintathu zesihlibhi futhi ukuzilimaza. Ngakho-ke, lapho amaseli e-LifePo4 amaningi exhunywe ochungechungeni, amanani kagesi awo wonke amaseli kufanele alingane ukuze kutholwe ibhethri yephakethe ye-LifePo4 esebenza kahle kakhulu. Ibhethri le-LifePo4 legama likalwe cishe ku-3.2V kuphela, kodwa ku-izinhlelo zokugcina amandla ekhaya, izinsiza zamandla eziphathwayo, izimboni, i-telecom, izimoto zikagesi kanye nezinhlelo ze-microgrid, sidinga okuphakeme kakhulu kunomthamo we-voltage ozisholo wona. Eminyakeni yamuva, amabhethri e-LifePo4 avuselelwe kabusha adlale indima ebalulekile kumabhethri wamandla kanye nezinhlelo zokugcina amandla ngenxa yesisindo sawo esilula, amandla aphezulu, impilo ende, umthamo omkhulu, ukushaja okusheshayo, amazinga aphansi okuzikhulula kanye nobungane bemvelo. Ukulinganisa amaseli kuqinisekisa ukuthi i-voltage namandla weseli ngayinye ye-LifePo4 isezingeni elifanayo, ngaphandle kwalokho, ububanzi kanye nempilo yonke yephakethe yebhethri ye-LiFePo4 kuzoncishiswa kakhulu, futhi ukusebenza kwebhethri kuzokwehliswa! Ngakho-ke, ibhalansi yeseli ye-LifePo4 ingenye yezinto ezibaluleke kakhulu ekunqumeni ikhwalithi yebhethri. Ngesikhathi sokusebenza, igebe elincane likagesi lizokwenzeka, kodwa singaligcina phakathi kwebanga elamukelekayo ngokusebenzisa ukulinganisa kwamaseli. Ngesikhathi sokulinganisa, amaseli omthamo ophezulu adlula umjikelezo wokushaja/wokukhipha. Ngaphandle kokulinganisa kweseli, iseli elinomthamo ongasheshi kakhulu liyindawo ebuthakathaka. Ukulinganisa amaseli kungomunye wemisebenzi eyinhloko ye-BMS, kanye nokuqapha izinga lokushisa, ukushaja neminye imisebenzi esiza ukukhulisa impilo yephakethe. Ezinye izizathu zokulinganisa ibhethri: I-LifePo4 battery pcak ukusetshenziswa kwamandla okungaphelele Ukumunca amandla amaningi kunalokho okuklanyelwe ibhethri noma ukushoda kwebhethri kungenzeka kubangele ukwehluleka kwebhethri ngaphambi kwesikhathi. Uma iphakethe lebhethri le-LifePo4 liphuma, amaseli abuthaka azophuma ngokushesha kunamaseli anempilo, futhi azofinyelela umbane ophansi ngokushesha kunamanye amaseli. Uma iseli lifinyelela i-voltage encane, lonke iphakethe lebhethri nalo liyanqanyulwa ekulayisheni. Lokhu kubangela umthamo ongasetshenzisiwe wamandla ephakethe lebhethri. Ukucekelwa phansi kweseli Lapho iseli le-LifePo4 lishajwa ngokweqile ngisho nangaphezu kwalokho okusikiselwayo kokufaneleka kwalo kanye nendlela yokuphila yeseli iyancishiswa. Njengesibonelo ukwenyuka okuncane kwamandla kagesi wokushaja ukusuka ku-3.2V kuya ku-3.25V kuzodiliza ibhethri ngokushesha ngo-30%. Ngakho-ke uma ukulinganisa kweseli kungalungile nokushajwa ngokweqile okuncane kuzonciphisa isikhathi sebhethri. Ukushaja Okungaphelele Kwephakethe Leseli Amabhethri e-LifePo4 akhokhiswa amandla aqhubekayo aphakathi kuka-0.5 kanye namazinga angu-1.0. I-voltage yebhethri ye-LifePo4 iyakhuphuka njengoba ukushaja kuqhubeka nokuba phezulu lapho kukhokhiswa ngokuphelele ngemva kwalokho kwehla. Cabanga ngamaseli amathathu ane-85 Ah, 86 Ah, ne-87 Ah ngokulandelana kanye ne-100% ye-SoC, futhi wonke amaseli asuke esekhululiwe futhi i-SoC yawo iyancipha. Ungathola ngokushesha ukuthi iseli 1 ligcina lingowokuqala ukuphelelwa amandla ngenxa yokuthi linamandla aphansi kakhulu. Uma amandla efakwa kumaphakethe weseli kanye nalawo akhona ahamba ngamaseli, futhi, iseli 1 lilenga emuva ngesikhathi sokushajwa futhi lingacatshangwa ukuthi lishajwe ngokugcwele njengoba amanye amaseli amabili eshajwa aphelele. Lokhu kusho ukuthi amaseli 1 anokwehliswa kwe-Coulometric Effectiveness (CE) ngenxa yokuzishisisa kweseli okuholela ekungalinganini kwamaseli. I-Thermal Runaway Iphuzu elibi kakhulu elingenzeka ukubalekela okushisayo. Njengoba siqondaamaseli e-lithiumzizwela kakhulu ekushajweni ngokweqile kanye nasekukhipheni ngokweqile. Ephaketheni lamaseli angu-4 uma iseli elilodwa lingu-3.5 V kanti elinye elihlukile lingu-3.2 V ukushaja kuzokhokhisa wonke amaseli ndawonye ngoba asochungechungeni futhi kuzokhokhisa iseli elingu-3.5 V ku-voltage enkulu kunokwelulekwa. amanye amabhethri asadinga ukushajwa.Lokhu kuholela ekubalekeni okushisayo uma intengo yokukhiqiza ukushisa kwangaphakathi idlula izinga okufudumala ngalo okungakhishwa ngalo.Lokhu kubangela ukuthi iphakethe lebhethri le-LifePo4 lingalawuleki ngokushisa. Yiziphi izinto ezibangela ukuthi Iseli lingalingani emaphaketheni ebhethri? Manje sesiyaqonda ukuthi kungani ukugcina wonke amaseli ebhalansi ephaketheni lebhethri kubalulekile. Nokho ukuze sibhekane nenkinga ngendlela efanele kufanele sazi ukuthi kungani amaseli ethola isandla sokuqala esingalingani. Njengoba kushiwo ngaphambili lapho iphakethe lebhethri lenziwa ngokubeka amaseli ochungechungeni kuqinisekiswa ukuthi wonke amaseli ahlala emazingeni kagesi afanayo. Ngakho-ke iphakethe lebhethri elisha lizohlala linamaseli abhalansile. Kodwa njengoba iphakethe lisetshenziswa amaseli ayaphuma ebhalansini ngenxa yokuhambisana nezici. Umehluko we-SOC Ukukala i-SOC yeseli kuyinkimbinkimbi; ngakho-ke kuyinkimbinkimbi kakhulu ukukala i-SOC yamaseli athile ebhethrini. Indlela elungile yokuhlanganisa iseli kufanele ifane namaseli e-SOC efanayo esikhundleni samadigri kagesi afanayo ncamashi (OCV). Kodwa njengoba cishe kungenzeki amaseli afaniswa kuphela kumagama wevolthi lapho enza iphekhi, okuhlukile ku-SOC kungase kubangele ukuguqulwa ku-OCV ngokuhamba kwesikhathi. Ukuhluka kokumelana kwangaphakathi Kunzima kakhulu ukuthola amaseli okumelana kwangaphakathi okufanayo (IR) futhi njengeminyaka yebhethri, i-IR yeseli nayo iyashintshwa futhi ngenxa yalokho kuphakethe lebhethri akuwona wonke amaseli azoba ne-IR efanayo. Njengoba siqonda i-IR yengeza ekungathintekini kwangaphakathi kweseli okunquma ukusakaza kwamanje ngeseli. Ngenxa yokuthi i-IR iyahlukahluka okwamanje ngeseli kanye ne-voltage yayo nayo iyahluka. Izinga lokushisa Amandla okukhokha kanye nokukhulula eseli nawo ancike ezingeni lokushisa elizungezile. Ephaketheni lebhethri elibalulekile elinjengama-EV noma ama-solar array, amaseli asakazwa endaweni engcolile futhi kungase kube nomehluko wezinga lokushisa phakathi kwephakethe ngokwalo elidala iseli elilodwa ukuthi lishaje noma likhiphe ngokushesha kunamaseli asele abangela ukungalingani. Kulezi zici ezingenhla, kusobala ukuthi asikwazi ukuvimbela amaseli ukuthi angalingani kuyo yonke inqubo. Ngakho-ke, okuwukuphela kwekhambi ukusebenzisa isistimu yangaphandle edinga ukuthi amaseli alinganisele futhi ngemva kokuthola ukungalingani. Lolu hlelo lubizwa ngokuthi Isistimu Yokulinganisa Ibhethri. Ungayithola kanjani ibhalansi yephakethe yebhethri ye-LiFePo4? Uhlelo Lokuphatha Ibhethri (BMS) Ngokuvamile iphakethe lebhethri le-LiFePo4 alikwazi ukuzuza ukulinganisa kwebhethri ngokwalo, lingazuzwa ngokuthiuhlelo lokuphatha ibhethri(BMS). Umkhiqizi webhethri uzohlanganisa umsebenzi wokulinganisa ibhethri neminye imisebenzi yokuvikela njengokushaja phezu kwe-voltage yokuvikela, inkomba ye-SOC, i-alamu engaphezulu kwezinga lokushisa/ukuvikela, njll. kuleli bhodi le-BMS. Ishaja yebhethri ye-Li-ion enomsebenzi wokulinganisa Eyaziwa nangokuthi “ishaja yebhethri esele”, ishaja ihlanganisa ukusebenza kwebhalansi ukuze isekele amabhethri ahlukene anezinombolo zezintambo ezihlukene (isb. 1~6S). Ngisho noma ibhethri lakho lingenalo ibhodi le-BMS, ungashaja ibhethri lakho le-Li-ion ngale shaja yebhethri ukuze uzuze ukulinganisa. Ibhodi Lokulinganisa Uma usebenzisa ishaja yebhethri ebhalansisiwe, kufanele futhi uxhume ishaja nebhethri lakho ebhodini lokulinganisa ngokukhetha isokhethi ethile ebhodini lokubhalansisa. I-Protection Circuit Module (PCM) Ibhodi le-PCM liyibhodi le-elekthronikhi elixhunywe kuphakethe lebhethri le-LiFePo4 futhi umsebenzi walo oyinhloko ukuvikela ibhethri nomsebenzisi ekungasebenzini. Ukuqinisekisa ukusetshenziswa okuphephile, ibhethri ye-LiFePo4 kufanele isebenze ngaphansi kwemingcele eqinile kagesi. Kuye ngomkhiqizi webhethri kanye nekhemistri, le pharamitha ye-voltage iyahlukahluka phakathi kuka-3.2 V ngeseli yamabhethri alahliwe kanye no-3.65 V ngeseli yamabhethri ashajwayo. ibhodi le-PCM liqapha la mapharamitha kagesi futhi linqamule ibhethri ekulayishweni noma kushaja uma yeqiwe. Endabeni yebhethri elilodwa le-LiFePo4 noma amabhethri amaningi e-LiFePo4 axhunywe ngokufanayo, lokhu kufezwa kalula ngoba ibhodi le-PCM liqapha ama-voltages angawodwana. Nokho, lapho amabhethri amaningi exhunywe ochungechungeni, ibhodi le-PCM kufanele liqaphe ugesi webhethri ngalinye. Izinhlobo Zokulinganisa Ibhethri Ama-algorithms ahlukahlukene okulinganisa amabhethri enzelwe iphakethe lebhethri le-LiFePo4. Ihlukaniswe ngezindlela zokulinganisa ibhethri ezingenzi lutho nezisebenzayo ezisuselwe ku-voltage yebhethri ne-SOC. I-Passive Battery Balancing Indlela yokulinganisa ibhethri engenzi lutho ihlukanisa ukushajwa okweqile ebhethrini eligcwele amandla e-LiFePo4 ngokusebenzisa izinto ezikwazi ukumelana nomzimba futhi inika wonke amaseli ukushajwa okufanayo neshaji yebhethri ye-LiFePo4 ephansi kakhulu. Le nqubo inokwethenjelwa kakhulu futhi isebenzisa izingxenye ezimbalwa, ngaleyo ndlela yehlisa izindleko zesistimu iyonke. Kodwa-ke, ubuchwepheshe bunciphisa ukusebenza kahle kwesistimu njengoba amandla ahlakazwa ngendlela yokushisa okukhiqiza ukulahlekelwa kwamandla. Ngakho-ke, lobu buchwepheshe bufanele izicelo zamandla aphansi. Ukulinganisa kwebhethri okusebenzayo Ukulinganisa ukushaja okusebenzayo kuyisixazululo sezinselele ezihambisana namabhethri e-LiFePo4. Isu elisebenzayo lokulinganisa iseli likhipha inkokhiso lisuka ebhethrini lamandla aphakeme le-LiFePo4 futhi lilidlulisele ebhethrini lamandla aphansi le-LiFePo4. Uma kuqhathaniswa ne-passive cell balancing technology, le nqubo yonga amandla kumojula yebhethri ye-LiFePo4, ngaleyo ndlela ikhulise ukusebenza kahle kwesistimu, futhi idinga isikhathi esincane sokulinganisela phakathi kwamaseli ephakethe lebhethri le-LiFePo4, okuvumela ukushaja kwemisinga ephezulu. Ngisho noma iphakethe lebhethri le-LiFePo4 liphumulile, ngisho namabhethri e-LiFePo4 afaniswe kahle alahlekelwa ukushajwa ngamanani ahlukene ngoba izinga lokuzikhipha liyahlukahluka kuye ngezinga lokushisa: ukukhuphuka okungu-10°C kwezinga lokushisa kwebhethri sekuvele kuliphinda kabili izinga lokuzikhipha. . Kodwa-ke, ukulinganisa kokushaja okusebenzayo kungabuyisela amaseli ekulinganeni, ngisho noma ephumule. Kodwa-ke, le nqubo inomjikelezo oyinkimbinkimbi, okwandisa izindleko zesistimu jikelele. Ngakho-ke, ukulinganisa kwamaseli okusebenzayo kulungele ukusetshenziswa kwamandla aphezulu. Kukhona ama-topology esekethe yokulinganisa asebenzayo ahlukaniswe ngokwezingxenye zokugcina amandla, njengama-capacitor, ama-inductors/ama-transformer, neziguquli zikagesi. Sekukonke, isistimu yokuphatha ibhethri esebenzayo inciphisa izindleko eziphelele zephakethe lebhethri le-LiFePo4 ngoba ayidingi ukweqisa kwamaseli ukuze kunxeshezelwe ukuhlakazeka nokuguga okungalingani phakathi kwamabhethri e-LiFePo4. Ukuphathwa kwebhethri okusebenzayo kuba bucayi lapho amaseli amadala eshintshwa amaseli amasha futhi kukhona umehluko omkhulu phakathi kwebhethri yephakethe ye-LiFePo4. Njengoba amasistimu okuphatha amabhethri asebenzayo enza kube nokwenzeka ukufaka amaseli anokwehluka okukhulu kwepharamitha kumaphakethe webhethri we-LiFePo4, ukukhiqizwa kokukhiqiza kuyenyuka kuyilapho izindleko zewaranti nezokulungisa zincipha. Ngakho-ke, amasistimu okuphatha ibhethri asebenzayo azuzisa ukusebenza, ukwethembeka nokuphepha kwephakethe lebhethri, kuyilapho esiza ukunciphisa izindleko. Fingqa Ukuze kuncishiswe imiphumela ye-voltage drift yeseli, ukungalingani kufanele kulinganiswe ngendlela efanele. Umgomo wanoma yisiphi isisombululo sokulinganisa ukuvumela iphakethe lebhethri le-LiFePo4 ukuthi lisebenze ezingeni elihlosiwe lokusebenza kanye nokwelula umthamo walo otholakalayo. Ukulinganisa ibhethri akubalulekile nje kuphela ekuthuthukiseni ukusebenza kanyeumjikelezo wempilo wamabhethri, futhi yengeza isici sokuphepha kuphakethe le-LiFePo4battery. Obunye bobuchwepheshe obuvelayo bokuthuthukisa ukuphepha kwebhethri nokwelula impilo yebhethri. Njengoba ubuchwepheshe obusha bokulinganisa ibhethri bulandelela inani lokulinganisa elidingekayo kumaseli e-LiFePo4 ngamanye, kwandisa impilo yephakethe lebhethri le-LiFePo4 futhi kuthuthukise ukuphepha kwebhethri kukonke.