A I-LiFePO4 BMS (Inkqubo yoLawulo lweBhetri)yibhodi yesekethe ye-elektroniki ejonga, ikhusela, kwaye ilinganise ipakethe yebhetri ye-lithium iron phosphate (LiFePO4). Ihlala phakathi kweeseli zebhetri kunye nenkqubo yombane yonke, ilinganisa rhoqo i-voltage, i-current, kunye nobushushu ukugcina iseli nganye isebenza ngaphakathi koluhlu olukhuselekileyo.

Ngaphandle kwe-BMS, ipakethi ye-LiFePO4 ayinalo ukhuselo olwakhelwe ngaphakathi ekutshajeni kakhulu, ukukhupha kakhulu, iisekethe ezimfutshane, okanye ukungalingani kweeseli — naziphi na ezinokuthi zifinyeze ubomi bepakethi okanye, kwimeko embi kakhulu, zidale ingozi yokhuseleko. Yingakho uninzi lweepakethi ze-LiFePO4 ezithengiswa ngorhwebo zisetyenziselwa ukugcina amandla elanga, ii-EV, ukusetyenziswa kolwandle, ii-RV, okanye umbane ongasemva one-BMS ezinikeleyo kunokuxhomekeka kwitshaja okanye kwi-inverter yodwa.

Kutheni iibhetri zeLiFePO4 zifuna iBMS ngokukodwa

Iiseli zeLiFePO4 zizinzile ngokwendalo kunezinye iikhemikhali zelithium ezifana ne-NCM (i-nickel cobalt manganese) okanye i-NCA (i-nickel cobalt aluminium), eyindlela esetyenziswa kakhulu yokugcina izinto ezisisigxina kunye nezicelo ezininzi zokuhamba. Kodwa "ukuzinza ngakumbi" akuthethi ukuba "akukho mfuneko yolawulo." Iphakheji yeLiFePO4 yeeseli ezininzi isajongene neengxaki ezintathu eziphindaphindayo ezenzelwe ngokukodwa i-BMS ukujongana nazo:

• Ukushukuma kwevolthi yeseli.Kwaneeseli ezivela kwibhetshi enye yemveliso azigugi ngokufanayo. Kwimijikelo emininzi, umahluko omncinci wokwenziwa kwezinto uhlangana ube zizithuba zevolthi ezicacileyo phakathi kweeseli - eyona ngxaki yokulinganisela isekethe yenzelwe ukulungisa.
• Igophe elithe tyaba lokukhupha.I-LiFePO4 ine-voltage curve ethe tyaba kakhulu kwimo yayo yokutshaja, nto leyo eyenza kube nzima ukuqikelela amandla aseleyo ukusuka kwi-voltage yodwa. I-BMS enokubala i-coulomb — elandelela ubungakanani obuchanekileyo bombane ohambayo nophumayo kwiphakheji ngokuhamba kwexesha, endaweni yokuqikelela ukusuka kwi-voltage yodwa — inika ukufundwa kwemo yokutshaja okuchanekileyo ngakumbi.
• Ifestile yokusebenza ekhuselekileyo emxinwa kwiindawo ezikude.Iiseli zeLiFePO4 zilungile phakathi koluhlu lwazo lokutshaja kodwa zisafuna ukunqunyulwa okuqinileyo xa zitshajiwe ngokupheleleyo kunye nokukhupha okunzulu ukuze kuthintelwe ukulahleka komthamo wexesha elide.

Yintoni kanye kanye ekhusela i-LiFePO4 BMS?

I-BMS echazwe ngokufanelekileyo yeepakethe zebhetri ye-lithium iphatha le misebenzi yokukhusela ilandelayo:

1. Ukhuseleko lokutshaja ngaphezulu— iyanqamla ukutshaja xa nayiphi na iseli ifikelela kumda wayo wevolthi ephezulu
2. Ukhuseleko lokukhupha amanzi ngokugqithisileyo— inciphisa umthwalo ngaphambi kokuba i-voltage yeseli yehle ngokwaneleyo ukuze ibangele umonakalo ongunaphakade
3. Ukhuseleko olugqithisileyo / olufutshane— iphazamisa isekethe ukuba umsinga udlula umda olinganisiweyo
4. Ukhuseleko olugqithisileyo— iyamisa ukutshaja okanye ukukhupha ngaphandle kwefestile yobushushu ekhuselekileyo
5. Ukulinganisela iiseli— ilinganisa i-voltage kuzo zonke iiseli ezikuluhlu lwemitya, nokuba kungenziwanga okanye ngokusebenzayo

Ukulinganisela Okusebenzayo vs. Ukulinganisela Okungasebenziyo kwi-LiFePO4 BMS

Ukulinganisela okungasebenziyoikhupha amandla agqithisileyo kwiiseli ze-high-voltage njengobushushu obudlula kwi-resistor de yonke ipakethi ifikelele. Ilula, ayibizi kakhulu, kwaye yanele kwiipakethi ezincinci okanye usetyenziso apho imijikelo yokutshaja ingaqhelekanga.

Ukulinganisela okusebenzayoidlulisela amandla ukusuka kwiiseli ezine-voltage ephezulu ukuya kwiiseli ezine-voltage ephantsi endaweni yokuwachitha njengobushushu. Isebenza kakuhle, ivelisa ubushushu obuncinci obungafunekiyo, kwaye idla ngokubangela ukulinganisela okukhawulezayo kunye nempilo engcono yephakheji yexesha elide - okubaluleke ngakumbi njengobungakanani bephakheji, inani leeseli, kunye nokwanda kwamaza omjikelo (iiphakheji ezinkulu ze-ESS, indawo yokugcina ilanga ejikeleziswa imihla ngemihla, iiphakheji ze-EV ezinomthamo ophezulu).

Kwiipakethi ezincinci, ezisebenzisa umjikelo ophantsi, ukulinganisela okungasebenziyo kudla ngokwanela. Kwiinkqubo zeLiFePO4 ezinkulu okanye ezisebenzisa umjikelo omkhulu, ukulinganisela okusebenzayo kufanelekile kwiindleko ezongezelelweyo.

Indlela yokukhetha i-LiFePO4 BMS efanelekileyo

Xa uthelekisa i-BMS yeepakethi zebhetri ye-lithium, iinkcukacha ezine ziqinisekisa ukuba iya kuhambelana na nenkqubo yakho:

1. Inani leeseli (inani le-S).I-BMS kufuneka ihambelane ngokuchanekileyo nolungiselelo lothotho lwephakheji yakho — i-4S BMS yephakheji ye-12V, i-8S ye-24V, i-16S ye-48V, njalo njalo (ngokusekwe kwi-voltage yeseli eqhelekileyo ye-LiFePO4's ~3.2V). Ukubalwa kwe-S okungalunganga yenye yezona zinto zixhaphakileyo zokungahambelani kwe-BMS.
2. Uvavanyo lwangoku oluqhubekayo noluphezulu.Yenza ubungakanani beBMS bulingane nomgangatho ophezulu womzobo wakho, hayi nje umzobo oqhelekileyo, kwaye uyishiye intloko yakho — iBMS esebenza eluphahleni lwayo lwangoku rhoqo iya kubaleka ishushu kwaye iguge ngokukhawuleza.
3. Uhlobo lokulinganisela kunye nomsinga wokulinganisela.Njengoko kuchaziwe apha ngasentla, gqiba phakathi kokulinganisela okusebenzayo nokungashukumiyo ngokusekelwe kubungakanani bepakethi kunye nokuphindaphinda kokujikeleza, kwaye ujonge umsinga webhalansi (mA) — umsinga webhalansi ophezulu uthetha ukulingana ngokukhawuleza kwiipakethi ezinkulu.
4. Iprotokholi yonxibelelwano.Ukuba i-BMS ifuna ukuthetha ne-inverter, i-app yokubeka esweni, okanye inethiwekhi ye-CAN yesithuthi, qinisekisa ukuba ixhasa inkqubo efanelekileyo — edla ngokuba yi-RS485, i-CAN bus, i-UART, okanye i-Bluetooth — ngaphambi kokuba uyithenge, hayi emva kokufakela.

Iinkqubo zeLiFePO4 BMS ngeVoltage: 12V, 24V, kunye ne-48V/51.2V

Iibhodi ze-LiFePO4 BMS zihlala zichazwa yi-nominal system voltage, ehambelana nenani elithile leeseli:

• Iinkqubo ze-12V (4S):uqwalaselo oluqhelekileyo lwamandla aphathwayo, ukuseta okuncinci kwelanga, kunye nokutshintshwa kwebhetri efakwe ngaphakathi
• Iinkqubo ze-24V (8S):ixhaphakile kwiindlela zaselwandle, iiRV, kunye nokusetyenziswa kwelanga okuphakathi
• Iinkqubo ze-48V / 51.2V (16S):udidi oluqhelekileyo lwe-voltage yokugcina amandla ekhaya, ukufakelwa okukhulu kwelanga, kunye neerakhi ezininzi ze-ESS zorhwebo

Inani leeseli livela kwi-voltage ye-LiFePO4's ~3.2V eqhelekileyo ngeseli nganye — 4 × 3.2V ≈ 12.8V, 8 × 3.2V ≈ 25.6V, 16 × 3.2V ≈ 51.2V.

Iinkqubo ze-voltage ephezulu zihlala zifuna ingqwalasela engakumbi kwinkxaso yeprotocol yonxibelelwano, kuba zinokwenzeka ukuba zidibene ne-inverter okanye inkqubo ebanzi yolawulo lwamandla efuna idatha yexesha langempela evela kwi-BMS.

Imibuzo ebuzwa qho

Q1Ngaba ibhetri yeLiFePO4 iyayidinga iBMS?

Ewe. Nangona ikhemistri yeLiFePO4 izinzile ngakumbi kubushushu kunezinye iikhemistri zelithium, iphakheji yeeseli ezininzi isadinga i-BMS yokulinganisela iiseli, ukhuseleko lokutshaja/lokukhupha ngaphezulu, kunye nokulandelela ngokuchanekileyo imeko yokutshaja. Ukusebenzisa iphakheji yeLiFePO4 ngaphandle kwe-BMS kususa zonke ezi zikhuselo.

Q2Yintoni umahluko phakathi kwe-LiFePO4 BMS kunye ne-BMS ye-lithium-ion ngokubanzi?

Imisebenzi yokhuseleko oluphambili iyafana, kodwa ii-voltage cutoffs zibekwe ngokwahlukileyo kwikhemistri nganye — uluhlu lwe-voltage ye-LiFePO4 ngeseli nganye luphantsi kunee-NCM/NMC okanye ii-NCA lithium-ion cells. I-BMS eyakhelwe ikhemistri enye akufuneki isetyenziswe njengoko injalo kwenye ngaphandle kokulungisa kwakhona imida ye-voltage ukuze ihambelane nedatha yeseli.

Q3Yeyiphi i-amperage BMS endiyidingayo kwiphakheji yeLiFePO4?

Tshatisa umlinganiselo wangoku oqhubekayo we-BMS kunye nomlinganiselo wokwenyani oqhubekayo wenkqubo yakho, kwaye ukhethe imodeli enomlinganiselo ophezulu/wokunyuka ogubungela kakuhle ii-spikes zexeshana (ukuqala kwenjini, ukunyuka kwe-inverter, njl.njl.) ngaphandle kokukhubeka.

Q4Ndingayiseta njani kwakhona i-LiFePO4 BMS?

Uninzi lweeyunithi ze-BMS ziyabuya ngokuzenzekelayo xa imeko yempazamo iphelile — umzekelo, xa i-voltage ibuyela kuluhlu olukhuselekileyo emva kwesiganeko sokutshaja kakhulu okanye sokukhupha ngaphezulu. Ezinye iimodeli zikwafuna ukuphinda kuqhagamshelwe ngesandla kwesango lokutshaja okanye lokukhupha, okanye ukunqamla/ukudibanisa kwakhona ipakethe okufutshane, ukuze kucinywe impazamo ebambekileyo. Soloko ujonga amaxwebhu emodeli ethile ye-BMS, kuba indlela yokuseta kwakhona iyahluka ngokoyilo.

Q5Ngaba i-BMS enye ingasebenza neekhemikhali ezininzi ze-lithium?

Ezinye iimodeli ze-BMS zinokucwangciswa kuzo zonke iikhemistri — iLiFePO4, iNCM, okanye iLTO (i-lithium titanate) — ngokusebenzisa imida yevolthi ehlengahlengiswayo, kodwa oku kufuneka kumiselwe ngokuchanekileyo kwikhemistri ethile esetyenziswayo. I-BMS eneentambo eziqinileyo zoluhlu lwevolthi yekhemistri enye akufuneki ithathwe njengekhuselekileyo kwenye ngaphandle kokuqinisekisa ukucwangciswa kuqala. Ayizizo zonke iimodeli ezikwimarike ezixhasa oku — jonga iphepha ledatha elithile le-BMS endaweni yokucinga ngenkxaso ye-multi-chemistry ngokungagqibekanga.

Ukukhetha i-LiFePO4 BMS kwiProjekthi yakho

I-BMS efanelekileyo ixhomekeke kwi-voltage yephakheji yakho, inani leeseli, ukutsalwa kwangoku, kunye nendlela ekufuneka inxibelelane ngayo nayo yonke inkqubo yakho. Yabelana ngezi nkcukacha zine kwaye iqela lobuchwephesha le-DALY lingacebisa uqwalaselo oluhambelanayo: inani le-voltage/iiseli zenkqubo (umz. 12V/4S, 24V/8S, 48V/16S), iimfuno zangoku eziqhubekayo neziphezulu, ukusetyenziswa (ilanga/i-ESS, i-marine, i-RV, i-EV, i-forklift, njl.njl.), kunye neprotocol yonxibelelwano efunekayo (i-RS485, i-CAN bus, i-UART, i-Bluetooth).

• I-imeyile: dalybms@dalyelec.com
• Hlola ngokwezigaba: I-BMS ehlakaniphileyo · I-BMS yokulinganisela esebenzayo · Indawo yokugcina izinto ekhaya i-BMS · I-BMS yamandla aphezulu · Indawo yokugcina amandla yeRV BMS