A I-LiFePO4 BMS (Uhlelo Lokuphatha Ibhethri)yibhodi yesekethe kagesi eqapha, ivikele, futhi ilinganisele ibhethri le-lithium iron phosphate (LiFePO4). Ihlala phakathi kwamaseli ebhethri kanye nalo lonke uhlelo lukagesi, ilinganisa njalo i-voltage, ugesi, kanye nokushisa ukuze igcine yonke iseli isebenza ngaphakathi kwebanga eliphephile.

Ngaphandle kwe-BMS, iphakethe le-LiFePO4 alinaso isivikelo esakhelwe ngaphakathi ekushajeni ngokweqile, ekukhipheni ngokweqile, kuma-short circuits, noma ukungalingani kwamaseli — noma yikuphi okungafinyeza impilo yephakethe noma, esimweni esibi kakhulu, kudale ingozi yokuphepha. Yingakho iningi lamaphakethe e-LiFePO4 athengiswa ngokuhweba ukuze agcinwe elangeni, ama-EV, ukusetshenziswa kolwandle, ama-RV, noma umkhumbi wamandla okusekelayo one-BMS ezinikele kunokuthembela kushaja noma ku-inverter kuphela.

Kungani Amabhethri e-LiFePO4 Adinga I-BMS Ngokukhethekile

Amaseli e-LiFePO4 azinzile kakhulu ekushiseni kunamanye amakhemikhali e-lithium njenge-NCM (i-nickel cobalt manganese) noma i-NCA (i-nickel cobalt aluminium), okuyindlela esetshenziswa kabanzi yokugcina izinto ezimile kanye nezinhlelo eziningi zokuhamba. Kodwa "ukuzinza kakhudlwana" akusho ukuthi "akudingeki ukuphathwa." Iphakethe le-LiFePO4 elinamaseli amaningi lisabhekene nezinkinga ezintathu eziphindaphindayo i-BMS eyenzelwe ngqo ukubhekana nazo:

• Ukukhukhuleka kwamandla eseli.Ngisho namaseli avela eqenjini elifanayo lokukhiqiza awagugi ngendlela efanayo. Emijikelezweni engamakhulu, umehluko omncane wokukhiqiza uhlangana ube yizikhala zamandla kagesi ezibalulekile phakathi kwamaseli - inkinga yokulinganisa isekethe yenzelwe ukulungisa.
• Ijika lokukhipha eliyisicaba.I-LiFePO4 inejika eliyisicaba kakhulu le-voltage kuyo yonke isimo sayo sokushaja, okwenza kube nzima ukulinganisa umthamo osele kusuka ku-voltage kuphela. I-BMS enokubala i-coulomb — elandelela inani eliqondile lamandla kagesi angena naphumayo ephaketheni ngokuhamba kwesikhathi, kunokuba ilinganise kusuka ku-voltage kuphela — inikeza ukufundwa kwesimo sokushaja okunembe kakhudlwana.
• Ifasitela lokusebenza eliphephile elincane kakhulu.Amaseli e-LiFePO4 ayakwazi ukushaja kahle phakathi nobubanzi bawo bokushaja kodwa asadinga ukunqanyulwa okuqinile lapho eshaja ngokugcwele kanye nokukhishwa okujulile ukuze kugwenywe ukulahlekelwa amandla isikhathi eside.

Yini ngempela evikela i-LiFePO4 BMS?

I-BMS echazwe kahle yamaphakethe ebhethri le-lithium iphatha imisebenzi elandelayo yokuvikela:

1. Ukuvikelwa kokushaja ngokweqile— inqamula ukushaja uma noma yiliphi iseli lifinyelela umkhawulo walo we-voltage ephezulu
2. Ukuvikelwa kokukhipha amanzi ngokweqile— kunciphisa umthwalo ngaphambi kokuba i-voltage yeseli yehle ngokwanele ukubangela umonakalo ohlala njalo
3. Ukuvikelwa kwe-overcurrent / short-circuit— kuphazamisa isekethe uma ugesi udlula umkhawulo olinganiselwe
4. Ukuvikelwa kokushisa okweqile— imisa ukushaja noma ukukhipha ngaphandle kwefasitela lokushisa eliphephile
5. Ukulinganisa amaseli— ilinganisa i-voltage kuwo wonke amaseli kuchungechunge lwezintambo, kungaba ngokunganaki noma ngokusebenzayo

Ukulinganisela Okusebenzayo vs. Ukulinganisela Okungasebenzi ku-LiFePO4 BMS

Ukulinganisela okungenamsebenziikhipha amandla amaningi avela kumaseli ane-voltage ephezulu njengokushisa nge-resistor kuze kube yilapho ingxenye esele yephakethe ifinyelela. Kulula, akubizi, futhi kwanele kumaphakethe amancane noma izinhlelo zokusebenza lapho imijikelezo yokushaja ingavamile khona.

Ukulinganisela okusebenzayoidlulisela amandla kusuka kumaseli ane-voltage ephezulu kuya kumaseli ane-voltage ephansi esikhundleni sokuwachitha njengokushisa. Isebenza kahle kakhulu, ikhiqiza ukushisa okuncane okulahlwayo, futhi imvamisa iphumela ekulinganiseni okusheshayo kanye nempilo engcono yephakethe yesikhathi eside - okubaluleke kakhulu njengoba usayizi wephakethe, inani lamaseli, kanye nokwanda kwemvamisa yomjikelezo (amaphakethe amakhulu e-ESS, isitoreji selanga esiqhutshwa nsuku zonke, amaphakethe e-EV anomthamo ophezulu).

Kumaphakethe amancane, asebenza ngomjikelezo ophansi, ukulinganisela okungasebenzi kuvame ukwanele. Kumasistimu amakhulu noma asebenza ngomjikelezo omkhulu we-LiFePO4, ukulinganisela okusebenzayo kuyafaneleka izindleko ezengeziwe.

Indlela Yokukhetha I-LiFePO4 BMS Efanele

Uma uqhathanisa i-BMS yamaphakethe ebhethri le-lithium, izici ezine zinquma ukuthi izofanelana yini nohlelo lwakho:

1. Inani lamaseli (inani lika-S).I-BMS kumele ifane kahle nokucushwa kochungechunge lwephakethe lakho — i-BMS engu-4S yephakethe le-12V, i-8S engu-24V, i-16S engu-48V, njalo njalo (ngokusekelwe ku-voltage yeseli ejwayelekile ye-LiFePO4 ~3.2V). I-S-count engalungile ingenye yezimbangela ezivame kakhulu zokungahambelani kwe-BMS.
2. Isilinganiso samanje esiqhubekayo nesiphezulu.Linganisa i-BMS ibe yi-maximum draw yakho yangempela, hhayi nje i-draw evamile, bese ushiya i-headroom — i-BMS esebenza ophahleni lwayo lwamanje oluphelele izoqhubeka nokusebenza kahle futhi iguge ngokushesha.
3. Uhlobo lokulinganisela kanye nomthamo wamanje webhalansi.Njengoba sekumboziwe ngenhla, nquma phakathi kokulinganisela okungasebenzi kanye nokusebenzayo ngokusekelwe kusayizi wephakethe kanye nemvamisa yokujikeleza, bese uhlola ibhalansi yamanje (mA) — ibhalansi yamanje ephezulu isho ukulingana okusheshayo kumaphakethe amakhulu.
4. Iphrothokholi yokuxhumana.Uma i-BMS idinga ukukhuluma ne-inverter, uhlelo lokusebenza lokuqapha, noma inethiwekhi ye-CAN yemoto, qinisekisa ukuthi isekela inqubo efanele — ngokuvamile i-RS485, ibhasi le-CAN, i-UART, noma i-Bluetooth — ngaphambi kokuthenga, hhayi ngemuva kokufakwa.

I-LiFePO4 BMS nge-Voltage: Izinhlelo ze-12V, 24V, kanye ne-48V/51.2V

Amabhodi e-LiFePO4 BMS ngokuvamile achazwa yi-voltage yesistimu ejwayelekile, ehambisana nenani elithile lamaseli:

• Izinhlelo ze-12V (4S):ukucushwa okuvame kakhulu kwamandla aphathekayo, ukusethwa okuncane kwelanga, kanye nokufakwa esikhundleni kwebhethri elifakiwe
• Izinhlelo ze-24V (8S):okuvamile ezisetshenziswa olwandle, e-RV, kanye nasezintweni ezisetshenziswa elangeni eziphakathi nendawo
• Izinhlelo ze-48V / 51.2V (16S):isigaba se-voltage esivame kakhulu sokugcina amandla ekhaya, ukufakwa okukhulu kwelanga, kanye nama-rack amaningi e-ESS ebhizinisi

Inani lamaseli litholakala ku-voltage ngayinye ye-LiFePO4 engu-~3.2V — 4 × 3.2V ≈ 12.8V, 8 × 3.2V ≈ 25.6V, 16 × 3.2V ≈ 51.2V.

Izinhlelo ze-voltage ephezulu ngokuvamile zidinga ukunakwa okwengeziwe ekusekelweni kwephrothokholi yokuxhumana, njengoba kungenzeka kakhulu ukuthi zihlanganiswe ne-inverter noma uhlelo olubanzi lokuphatha amandla oludinga idatha yesikhathi sangempela evela ku-BMS.

imibuzo ejwayelekile ukubuzwa

Q1Ingabe ibhethri le-LiFePO4 lidinga i-BMS?

Yebo. Ngisho noma ikhemistri ye-LiFePO4 izinzile kakhulu ekushiseni kunezinye ikhemistri ze-lithium, iphakethe lamaseli amaningi lisadinga i-BMS yokulinganisela amaseli, ukuvikelwa kokushaja ngokweqile/ukukhishwa ngokweqile, kanye nokulandelela okunembile kwesimo sokushaja. Ukusebenzisa iphakethe le-LiFePO4 ngaphandle kwe-BMS kususa zonke lezi zivikelo.

Q2Uyini umehluko phakathi kwe-LiFePO4 BMS kanye ne-BMS ejwayelekile ye-lithium-ion?

Imisebenzi yokuvikela eyinhloko iyafana, kodwa ama-voltage cutoffs ahlelwe ngendlela ehlukile kumakhemikhali ngamunye — ububanzi bamandla kagesi e-LiFePO4 ngeseli ngalinye buphansi kunamaseli e-NCM/NMC noma e-NCA lithium-ion. I-BMS eyakhelwe ikhemistri eyodwa akufanele isetshenziswe njengoba injalo kwenye ngaphandle kokulungisa kabusha imingcele yamandla kagesi ukuze ifane neshidi ledatha leseli.

Q3Ngidinga malini i-BMS ye-amperage ukuze ngibe nephakethe le-LiFePO4?

Qondanisa isilinganiso samanje esiqhubekayo se-BMS nesilinganiso sangempela esiqhubekayo sokudonsa esiphezulu sesistimu yakho, bese ukhetha imodeli enesilinganiso esiphezulu/sokukhuphuka esimboza kahle ama-spikes esikhashana (ukuqala kwenjini, ukukhuphuka kwe-inverter, njll.) ngaphandle kokukhubeka.

Q4Ngingayisetha kanjani kabusha i-LiFePO4 BMS?

Amayunithi amaningi e-BMS ayalulama ngokuzenzakalelayo uma isimo sephutha sesiphelile — isibonelo, uma i-voltage ibuyela ebangeni eliphephile ngemva komcimbi wokushaja ngokweqile noma wokukhipha ngokweqile. Amanye amamodeli adinga nokuxhumeka kabusha ngesandla kwephothi yokushaja noma yokukhipha, noma ukunqamula/ukuxhuma kabusha iphakethe okufushane, ukuze kusulwe iphutha elivalelekile. Hlola njalo imibhalo ethile yemodeli ye-BMS, njengoba ukuziphatha kokusetha kabusha kuyahlukahluka ngomklamo.

Q5Ingabe i-BMS eyodwa ingasebenza namakhemikhali amaningi e-lithium?

Amanye amamodeli e-BMS angalungiseka kuwo wonke amakhemistri — i-LiFePO4, i-NCM, noma i-LTO (i-lithium titanate) — ngokusebenzisa imingcele ye-voltage elungisekayo, kodwa lokhu kumele kusethwe kahle kumakhemikhali athile asetshenziswayo. I-BMS exhunywe ngocingo oluqinile lwebanga le-voltage yekhemistri eyodwa akufanele ithathwe njengephephile komunye ngaphandle kokuqinisekisa ukulungiseka kuqala. Akuwona wonke amamodeli emakethe asekela lokhu — hlola ishidi ledatha le-BMS elithile kunokuthi ucabangele ukwesekwa kwe-multi-chemistry ngokuzenzakalelayo.

Ukukhetha i-LiFePO4 BMS yephrojekthi yakho

I-BMS efanele incike ku-voltage yephakethe lakho, inani lamaseli, ukudonsa kwamanje, nokuthi idinga ukuxhumana kanjani nalo lonke uhlelo lwakho. Yabelana ngale mininingwane emine futhi ithimba lobuchwepheshe le-DALY lingancoma ukucushwa okufanako: inani lama-voltage/amaseli esistimu (isb. 12V/4S, 24V/8S, 48V/16S), izidingo zamanje eziqhubekayo neziphezulu, ukusetshenziswa (ilanga/i-ESS, i-marine, i-RV, i-EV, i-forklift, njll.), kanye nephrothokholi yokuxhumana edingekayo (i-RS485, ibhasi le-CAN, i-UART, i-Bluetooth).

• I-imeyili: dalybms@dalyelec.com
• Hlola ngesigaba: I-BMS ehlakaniphile · I-BMS Yokulinganisela Okusebenzayo · Isitoreji Sasekhaya i-BMS · I-BMS Yamanje Ephezulu · Isitoreji Samandla se-RV BMS