Intelligent junction box with voltage le khokahano ea hajoale ho li-EV

Intelligent junction box with voltage le khokahano ea hajoale ho li-EV

Ha likoloi tsa motlakase (EVs) li ntse li tsebahala haholoanyane, phephetso ea baetsi ba likoloi ke ho tlosa "matšoenyeho a mefuta-futa" ea bakhanni ha ba ntse ba etsa hore koloi e fihlellehe haholoanyane.Sena se fetolela ho etsa hore liphutheloana tsa betri li theko e tlase ka matla a phahameng a matla.Hora e 'ngoe le e' ngoe ea watt e bolokiloeng le ho khutlisoa liseleng e bohlokoa ho holisa sebaka sa ho khanna.

Ho ba le litekanyo tse nepahetseng tsa motlakase, mocheso le hona joale ke ntho ea bohlokoa ka ho fetisisa ho finyella tekanyo e phahameng ka ho fetisisa ea boemo ba tefiso kapa boemo ba bophelo bo botle ba sele e 'ngoe le e' ngoe tsamaisong.

Mosebetsi o ka sehloohong oa sistimi ea taolo ea betri (BMS) ke ho beha leihlo matla a lisele, ho pakela voltages le ho paka hajoale.Setšoantšo sa 1a se bonts'a pakete ea betri ka lebokoseng le letala le nang le lisele tse ngata tse pakiloeng.Sehlopha sa mookameli oa sele se kenyeletsa li-monitor tsa lisele tse hlahlobang motlakase le mocheso oa lisele.
Melemo ea BJB e bohlale:

E felisa lithapo le lithapo tsa likhoele.
E ntlafatsa litekanyo tsa voltage le tsa hajoale ka lerata le tlase.
E nolofatsa hardware le ntshetsopele ya software.Hobane li-pack monitor tsa Texas Instruments (TI) le li-monitor tsa lisele li tsoa lelapeng le le leng la lisebelisoa, meaho ea bona ea meralo le limmapa tsa ngoliso li tšoana haholo.
E nolofalletsa baetsi ba sistimi ho hokahanya voltage ea pakete le litekanyo tsa hajoale.Litieho tse nyane tsa kamahanyo li ntlafatsa likhakanyo tsa boemo ba tefiso.
Voltage, mocheso le tekanyo ea hona joale
Voltage: Matla a lekanngoa ho sebelisoa likhoele tse arohaneng tse arohaneng.Litekanyo tsena li lekola hore na li-switch tsa elektroniki li butsoe kapa li koetsoe.
Mocheso: Litekanyo tsa mocheso li lekola mocheso oa shunt resistor e le hore MCU e ka etsa kopo ea matšeliso, hammoho le mocheso oa li-contactor ho etsa bonnete ba hore ha li hatellehe.
Hajoale: Litekanyo tsa hajoale li ipapisitse le:
Sehanyetsi sa shunt.Hobane maqhubu a EV a ka nyolohela ho likete tsa li-ampere, li-shunt resistors tsena li nyane haholo - ho tloha ho 25 µOhms ho isa ho 50 µOhms.
Sensor ea phello ea holo.Mefuta ea eona e matla e tloaelehile, ka hona, ka linako tse ling ho na le li-sensor tse ngata tsamaisong ea ho lekanya mefuta eohle.Li-sensor tsa Hall-effect ka tlhaho li kotsing ea ho sitisoa ke motlakase.U ka beha li-sensor tsena kae kapa kae tsamaisong, leha ho le joalo, 'me ka tlhaho li fana ka tekanyo e ikhethileng.
Voltage le khokahano ea hajoale

Khokahano ea Voltage le ea hajoale ke tieho ea nako e teng ho etsa sampole ea motlakase le ea hajoale lipakeng tsa pack monitor le cell monitor.Litekanyo tsena li sebelisoa haholo-holo ho bala boemo ba tefiso le boemo ba bophelo bo botle ka electro-impedance spectroscopy.Ho bala ho senyeha ha sele ka ho lekanya motlakase, hona joale le matla ho pholletsa le sele ho nolofalletsa BMS ho shebella matla a koloi hang-hang.

Matla a sele, pack voltage le pack current li tlameha ho hokahanngoa nako ho fana ka likhakanyo tse nepahetseng ka ho fetesisa tsa matla le ho sitisa.Ho nka lisampole ka nako e itseng ho bitsoa nako ea kamahanyo.Ha sekgahla sa kamahanyo se se se nyane, ke moo khakanyo ea matla e nepahetseng haholoanyane kapa khakanyo ea tšitiso.Phoso ea data e sa amaneng e lekana.Ha tekanyetso ea boemo ba tefiso e nepahetse haholoanyane, bakhanni ba lik'hilomithara ba ntse ba eketseha.

Litlhoko tsa kamahanyo

Li-BMS tsa moloko o latelang li tla hloka litekanyo tsa motlakase tse hokahantsoeng le litekanyo tsa hajoale ka tlase ho 1 ms, empa ho na le mathata ho fihlela tlhoko ena:

Li-monitor tsohle tsa lisele le li-pack monitor li na le mehloli e fapaneng ea oache;ka hona, lisampole tse nkiloeng ha lia hokahanngoa ka tlhaho.
Selikali se seng le se seng sa sele se ne se ka lekanya ho tloha ho lisele tse tšeletseng ho isa ho tse 18;data ea sele ka 'ngoe e bolelele ba likotoana tse 16.Ho na le lintlha tse ngata tse hlokang ho fetisoa holim'a sehokelo sa daisy-chain, se ka jang tekanyetso ea nako e lumelletsoeng bakeng sa khokahano ea motlakase le ea hajoale.
Setlhopha sefe kapa sefe se joalo ka setlhola sa motlakase kapa sefe sa hajoale se ama tsela ea mats'oao, se kenyang letsoho ho litiehiso tsa khokahano ea motlakase.
Li-monitor tsa betri tsa TI's BQ79616-Q1, BQ79614-Q1 le BQ79612-Q1 li ka boloka kamano ea nako ka ho fana ka taelo ea ho qala ea ADC ho sebali sa sele le sesupo sa pakete.Li-monitor tsena tsa betri tsa TI li boetse li ts'ehetsa sampole ea ADC e liehileng ho lefella tieho ea phatlalatso ha o fetisetsa taelo ea ho qala ea ADC ho theosa sebopeho sa daisy-chain.

Qetello

Boiteko bo boholo ba ho kenya motlakase indastering ea likoloi bo tsamaisa tlhoko ea ho fokotsa ho rarahana ha li-BMS ka ho kenya lisebelisoa tsa elektroniki ka har'a lebokose la mateano, ha ho ntse ho matlafatsa polokeho ea sistimi.Pack monitor e ka lekanya li-voltage sebakeng sa heno pele le ka mor'a li-relay, ea hajoale ka pakete ea betri.Lintlafatso tse nepahetseng ho matla a motlakase le litekanyo tsa hajoale li tla fella ka tšebeliso e nepahetseng ea betri.

Matla a matla a motlakase le ho hokahanya ha hona joale ho etsa hore ho be le lipalo tse nepahetseng tsa boemo ba bophelo bo botle, boemo ba tefiso, le lipalo tsa spectroscopy tsa motlakase tse tla fella ka tšebeliso e nepahetseng ea betri ho lelefatsa bophelo ba eona, hammoho le ho eketsa mefuta ea ho khanna.