Kubara Coulomb Niki?
Nabajijwe ibijyanye no kugereranya SOC inshuro nyinshi kuruta uko nshobora kubara. Ikibazo gikunze kuza mugihe ipaki yumuntu yerekana 30% kurugero ariko igafunga nyuma yiminota ibiri. Inshuro icyenda kuri icumi, umuzi utera ibisobanuro kuri Coulomb kubara byagenze nabi.
Igitekerezo
Coulomb ibara inzira yishyuza kandi ikishyuza. Byiza byoroshye kurupapuro. Uhuza ibyagezweho mugihe, komeza wirukane neza, kandi ibyo bikubwira umubare umutobe usigaye muri selire.
Ingero za BMS zigezweho - mubisanzwe ahantu hagati ya 10 Hz na 100 Hz bitewe na porogaramu - kandi buri sample igenda igwizwa nigihe cyigihe. Ongeraho. Kuramo ubushobozi bwawe bwo gutangira. Hano hari numero yawe ya SOC.
Aho Bibi
Dore ibyo ibitabo bidashimangira bihagije. Iyo sensor iriho wishingikirije ifite offset drift. Ifite amakosa. Ifite coefficient. Imodoka isanzwe irashobora kugaragara kuri ± 0.5%, ariko ibyo mubihe byiza kuri dogere 25. Shyira munsi ya hood muri Phoenix muri Nyakanga, urareba imibare itandukanye.
Nakoze kuri progaramu ya 48V yoroheje ya Hybrid kera muri 2019. Twari dufite shunt ya Vishay yagereranijwe kuri 100 μΩ. Urupapuro rwiza. Muri laboratoire, ibintu byose byakurikiranwe neza. Shyira mumodoka ikora feri yubuzima bushya uhagarara - na - kugenda, kandi nyuma yamasaha atandatu SOC yari yatwaye 8%. Ubushuhe bwumuriro wa shunt ntibushobora kugendana nubu bugenda. Twarangije kongeramo ubushyuhe bwabugenewe kuri shunt ubwayo no gukora algorithm yindishyi mubikoresho bya BMS.
Ikibazo cyo hasi
Uyu aruma abantu igihe cyose. Icyuma cya salle ya Hall cyangwa shunt yawe ifite urusaku. Munsi yenda 500 mA kumapaki asanzwe ya EV, ikimenyetso - kugeza - igipimo cyurusaku kiratandukana. Ariko selile iracyari wenyine - gusohora. BMS iracyashushanya ibintu bituje. Abavugana bafite imyanda.
Mugihe kirenze bibiri - icyumweru cyo guhagarara, utu tuntu duto twiyongera. Nabonye paki zitakaza 3-4% SOC konte ya Coulomb itigeze yiyandikisha. Nyirubwite agaruka mubiruhuko, igipimo cyerekana 85%, ariko ubushobozi nyabwo buri hafi 81%. Kora ibyo inshuro nke, kandi windows yawe yo kwisubiramo ntishobora gufata.
Amakipe amwe akora parallel - moderi yo gusohora. Abandi bahatira gusa OCV kwisubiramo nyuma yikiruhuko icyo aricyo cyose mumasaha 4. Nta gisubizo cyuzuye. Abantu ISO 26262 bazakubaza uko ubyitwaramo muri FMEA yawe, kandi byiza ufite ingamba zanditse.
Ubushobozi burashira
Akagari waranze mugihe cyiterambere ntabwo selile ufite nyuma yinzinguzingo 500. Ubushobozi bw'izina buragabanuka. Kurwanya imbere birazamuka. Ariko konte ya Coulomb ntabwo ibizi keretse ubibabwiye.
TI igipimo cya IC - urukurikirane rwa BQ34, kurugero - ikore impedance y'imbere ikurikirana kandi ihindure ubushobozi bwuzuye bwigihe. Nuburyo bw'icyitegererezo - uburyo bushingiye kumurongo wo kubara Coulomb. Maxim 17205 ikora ibintu bisa. Kubishushanyo mbonera bya BMS, urimo kwiyubaka wenyine, kandi bisaba amakuru yemewe yo gusaza kuva muri chimie yihariye ya selile.
NCM selile yitwara bitandukanye na LFP hano. LFP ifite plaque ya voltage ituma OCV - ikosora ikosora hafi ntacyo imaze murwego rwa 20-80% SOC. Watsimbaraye ku kwishingikiriza kuri Coulomb kubara cyane, bivuze ko ibyumviro byawe byukuri bifite akamaro kanini kurushaho.
Kwisubiramo bifatika
Amafaranga yuzuye ni inshuti yawe. Iyo voltage ikubise urwego rwo kurangiza hamwe na tapers iri munsi ya C / 20 cyangwa ibyo wahagaritse byose, usubiramo 100%. Biroroshye. Yizewe. Kora buri gihe ukeka ko charger yawe na BMS bumvikanye kubyo "byuzuye" bivuze.
Kurangiza gusohora ni amacenga. Ivi rya voltage rirahanamye, ubushyuhe - biterwa, kandi bigira ingaruka kumateka yimitwaro ya vuba. Sisitemu nyinshi ntizisubiramo ubusa. Bakoresha gusa amafaranga yuzuye nka ankor point kandi bizera kubara hagati.
Ibikoresho bimwe bihagaze byububiko bikora ibizamini byubushobozi. Rimwe mu kwezi, sisitemu ikora igenzurwa ryuzuye kandi ikishyuza. Ibyo biguha ukuri gushingiye. Abakoresha amato hamwe na EV rimwe na rimwe babikora. Birababaje mubikorwa ariko bikemura ikibazo cya drift.
Ibyo mbwira ba injeniyeri bashya
Kubara Coulomb ntabwo ari algorithm ihanitse. Nukwiyongera no gukuramo hamwe namakosa menshi yaturutse. Ubuhanga ni ukumva aho amakosa aturuka no kugira ingamba zo kubihuza.
Shakisha icyerekezo cyawe cya sensor iburyo. Sobanukirwa n'imyitwarire y'ubushyuhe. Tegura ingamba zawe zo kwisubiramo mbere yo kwandika umurongo umwe wa code. Gerageza hamwe na selile nyayo kubushyuhe nyabwo munsi yumutwaro wuzuye. Intebe yashyizwe hamwe n'amashanyarazi hamwe n'umutwaro wa elegitoronike ntabwo igiye kukwereka ibibazo uzabona mumurima.
