Kurenza urugero ni iki?
Kubona umuhamagaro wapakiye muri Ohio kuwa kabiri ushize. Bafite paki ya 14S LFP yagarutse ivuye mumirasire y'izuba hamwe na selile ebyiri zisoma 3.91V. LFP. Ntugomba na rimwe kubona ikintu kiri hejuru ya 3.65V mugukoresha bisanzwe. Ingirabuzimafatizo zasaga neza ziturutse hanze ariko iyo twacaguye imwe ifungura cathode foil yari yarahindutse umukara kumpera. Ibyangiritse birenze urugero.
Usanga bakoresheje amashanyarazi - charger. Umukiriya yarayihinduye kuko umwimerere wapfuye. Kurongora - acide 48V ishira hanze 58.4V ireremba. Kuri paki ya 14S LFP ikora kuri 4.17V kuri selile. Ntabwo ari ikibazo cyo kuyobora - aside. Ikibazo gikomeye kuri LFP.
Ibintu nkibi bibaho kuruta uko abantu babyemera.
Kurenza urugero bisobanura gusunika selile irenga igipimo cyayo ntarengwa cyagenwe. Umubare uterwa na chimie. NMC na NCA hejuru kuri 4.20V. Bimwe murwego rwo hejuru - ingufu za NMC zapimwe kuri 4.35V ariko izo ni selile zidasanzwe kandi ugomba kumenya icyo urimo ukora. Ubuhanga bwa LFP bufite igisenge cya 3.65V. LTO ni hafi 2.85V. Iyi mibare iva muri selire y'abacuruzi datasheet. Ntiwirengagize kandi uzagira ibibazo.
Kwangirika kwimbere
Ibibera imbere muri selire kuri overvoltage ntabwo bigoye. Ibikoresho bya cathode bifuza kureka ogisijeni mugihe uyihatiye lithium nyinshi. Iyo ogisijeni ikora hamwe na electrolyte. Hagati aho icyuma cya lithium gitangira gushira hejuru ya anode kuko grafite ntishobora gukuramo ion byihuse. Isahani ni mbi kubwimpamvu ebyiri. Nubushobozi budasubirwaho gutakaza ubushobozi kandi butera dendrite ishobora amaherezo kugabanya selile imbere.
Abantu benshi batekereza ko hari margin yubatswe muri 4.20V. Nta.
Inganda zikora selile zishyiraho imipaka mugihe aho gutesha agaciro bitemewe. Kujya kuri 4.25V rimwe birashoboka ko ari byiza. Kujyayo buri cyiciro kizica selile mumagana magana aho kuba ibihumbi bike. Kujya hejuru ya 4.30V kandi ntushobora kubona inzinguzingo magana. Nabonye selile zabyimbye kuri 4.35V nyuma yo kwishyuza rimwe. Biterwa na selire.
Uruhare rwa BMS
BMS igomba gufata ibi. Buri selile iri mumapaki ibona insinga zayo. Chip ya AFE isoma voltage zose za selile kandi igereranya numuryango. Niba selile iyo ari yo yose irenze, kwishyuza birahagarara. Byoroshye.
Usibye BMS irashobora kunanirwa. Nabonye imbaho za BMS hamwe nugurisha gukonje gufatanye kumyumvire ya wire. Akagari kamwe kahagarika raporo kandi software ikora kuri zeru aho kwerekana amakosa. Nabonye chip ya AFE isohoka muri cal hejuru yubushyuhe. TI ya BQ76940 muri rusange irakomeye ariko BQ76925 ishaje yari ifite ibibazo bijyanye no guhinduranya imbere. Chipe zihenze zo mu Bushinwa AFE zirashobora kuba ahantu hose.
Kuringaniza ibintu kuruta uko abantu babitekereza. Ipaki ifite selile icumi murukurikirane izaba ifite gukwirakwira mubushobozi. Akagari kamwe gakubita amafaranga yuzuye imbere yandi. Niba kuringaniza bitinda cyane selile ndende yicara kuri 4.20V mugihe ikomeza ikomeza gutemba mumapaki. Umuvuduko uri kuri iyo selile urazamuka. Hamwe no kuringaniza passiyo ugarukira nubushyuhe ushobora guta mumashanyarazi. Ibishushanyo byinshi bikoresha 50mA kugeza 100mA kuringaniza. Niba selile zawe zidahuye nibice bike ku ijana bishobora kuba bidahagije.
Kuringaniza bifatika kwimura amafaranga ava muri selile ndende kugeza selile nkeya aho kuyitwika. Birahenze cyane. Biragoye. Byumvikane kumapaki manini aho ingufu zapfushije ubusa ziyongera cyangwa kubisabwa aho udashobora kwihanganira ubushobozi ubwo aribwo bwose.
Igishushanyo mbonera ni ikindi gice cyikigereranyo. Guhindura ibintu hamwe nibitekerezo bidasubirwaho amabwiriza azarenga umutwaro uremereye. Napimye charger zishyira hanze 42.5V mugihe ipaki ikurura munsi ya 100mA hafi yo kwishyurwa. Iyongera igice cya volt ikwirakwizwa muri selile icumi ni 50mV imwe imwe. Ntabwo ari ibiza ariko byiyongera hamwe nubundi kwihanganira.
Indishyi z'ubushyuhe muri charger nazo zifite akamaro. Litiyumu selile igomba kwishyuza voltage yo hasi iyo ishyushye. Amashanyarazi amwe ahindura CV igendeye kuri thermistor. Abenshi bahendutse ntabwo. Ipaki yicaye ku zuba kuri 45C kwishyurwa kuri 4.20V isanzwe kuri selile irarengerwa neza.
Inzego ebyiri zo kurinda ziruta imwe. BMS ireba voltage ya selile. Icyiciro cya kabiri cyo kurinda IC irashobora kureba voltage yamashanyarazi ikagabanya FET niba hari ibitagenda neza. Kuri pack ya Ohio yatangije iki kiganiro cyose, ntanubwo yabayeho. Bafite ibiragi BMS batavuga gusa kuringaniza. Nta burinzi. Umukiriya yibwiraga ko charger izabikora. Ibitekerezo bibi.
Igishushanyo mbonera
Niba urimo gutegura paki urutonde ni rugufi.
- Koresha BMS ifite selile nyayo - urwego OVP.
- Shiraho urwego ntarengwa, wenda 4.18V kuri NMC.
- Menya neza ko kuringaniza bishobora kugendana na selile yawe ikwirakwira.
- Kuzuza charger hejuru y ibahasha ikora ntabwo iri mucyumba cya temp gusa ku ntebe.
- Ongeraho inzira ya kabiri yo kurinda niba porogaramu ifite ishingiro.
Ipaki ya Ohio irimo kwiyubaka hamwe na BMS ikwiye hamwe na charger ya sp'd ya LFP. Isomo rihenze. Byashobokaga kuba bibi. Nta muntu wakomeretse kandi nta kintu cyafashwe n'umuriro. Ntabwo buri gihe uko izi nkuru zirangira.
