Chii Chiri Chiyero Chazvino?
Chero ani akashanda neBMS akaonaSOCkuverenga kusingaenderane nezvokwadi. Bhatiri rinoratidza 30% uye forklift inofa kamwe kamwe. Kana kuti inorova 80% uye inosvetuka yakananga kuzara. Bhurawuza chero forklift forum uye iwe unowana tambo nezve "bhatiri rinoratidza 100% asi risingatange" kana "kungoerekana kudzima pa25% SOC." Inogona kunge iri kusaenzana kwesero, yakaipa kuenzanisa algorithm, kana BMS bugs. Asi chinhu chimwe chinowanzo furatirwa: chiyero chazvino pachacho chinogona kunge chadzimwa.
Isa chaiyo resistor munhevedzano nedunhu, kuyera kudonha kwevoltage, shandisa Ohm's Law. Resistor iyoyo inonzi shunt.
EV uye maindasitiri mabhatiri masisitimu anoshandisa shunts mune iyo 25µΩ kusvika 100µΩ renji. Nei zvakaderera zvakadaro? Sunda 600A kuburikidza ne0.5mΩ shunt uye uri kutarisa 180W yekupisa kupisa. Kupisa ikoko kunofanira kuenda kumwe. Michina yakawanda yekugadzira yakatsaurira nzira dzekupisa dzakatenderedza musangano wezvino wekunzwa kuti ungotarisana neizvi.
Hall effect sensors inoyera iyo magineti inogadzirwa nekuyerera kwazvino pachinzvimbo chekuiswa mukati medunhu guru. Yakavakwa-mu galvanic isolation. Asi chokwadi chiri kunetsa padzikira-1000A{{5}yakatemerwa Hall module inoyera 10A inogona kuratidza kukanganisa kwakapetwa kakawanda pane pa500A. Mazhinji madhizaini eBMS anoshandisa Hall se backup, ine shunts ichiita yekutanga kunzwa.
Pakarepo ikozvino chikamu chemufananidzo. BMS inoda SOC, zvinoreva kubatanidza zvazvino nekufamba kwenguva-coulomb counting. Sampling ine ruzha uye offset. Imhanye kwenguva yakareba uye zvikanganiso zvinoungana. Masisitimu chaiwo anosanganisa kuverenga kwecoulomb nekuvhura-circuit voltage cross-cheki, kana kushandisa Kalman kusefa. Kuchengeta SOC kukanganisa mukati me5% chinhu chakajairika chinangwa.
Kugadzirwa kwemasero pafekitori kunoda kusimba chaiko pane inomhanya BMS. Kuumbwa kwazvino kunokanganisa SEI layer mhando, iyo inokanganisa kuenderana kwesero pane batch. Pasi pekugadzira panoshandisa-precision shunts ine 24{{5}bit ADCs. Lab-kuyedza giredhi inoshandisa fluxgate sensors-ppm-level yechokwadi, asi inodhura.
Ndeipi nzira yekushandisa zvinoenderana nekushandiswa. Forklifts inoona mapeak currents emazana akati wandei panguva yekusimudza{1}}BMS inofanirwa kubata maspikes aya pasina nzendo dzenhema. Ngoro dzegorofu dzinotora nguva shoma asi dzinogona kugara kwemwedzi isingashandiswe, saka kuyera madiki-zvinoita madhiri emvura kunonyanya kukosha.
