Chii chinonzi Voltage Monitoring?
Gore rakapera mutengi wekuGermany akasvika nekuti maforklift matatu mudura ravo akabva aramba kushanda. Zvakaratidza kuti mabhatiri anga akanaka-BMS yakanga yaita mhepo inosvika 40mV pakuverenga magetsi uye yakafunga kuti mapeki akanga awedzerwa. Akakiya zvese pasi. Michina mitatu yakafa kwezuva rose. Vanobhadhara neawa ikoko.
Yakanaka chaiyo nyaya, chaizvo. Voltage yekutarisa inonzwika sechinhu chakanyanya kukosha chinoitwa neBMS. Uye zvakadaro "basa rekutanga" rinokonzera matambudziko emunda kupfuura chero chinhu chipi zvacho.
Izvo Voltage Inokuudza
Chero ani anoshanda nemabhatiri anoziva kuti terminal voltage inguva chaiyo-chionioni chenguva yesero. SOC fungidziro zvinoenderana nazvo. Overcharge uye overdischarge kudzivirira kunoenderana nazvo. Cell consistency cheki zvinoenderana nazvo. IEC 62619: 2022 inoisa pachena: voltage inonyanya kukosha kupfuura ikozvino kana tembiricha, uye iyo BMS inofanirwa kucheka kuchaja isati yasvika kana nekukurumidza kana cell voltage yarova sirin'i yekuchengetedza.
Nei achinyatsojeka kudaro? Nekuti voltage inochinja kutanga. Kukwira kwemukati mekudzivirira, kupera simba, njodzi yelithium plating-izvi zvinoonekwa mumaitiro emagetsi masvondo kana mwedzi kusati kwaita tembiricha. Panguva yaunowana alarm yekudziya, zvinhu zvatoenda nedivi.
Toyota's AHR10W hybrid battery system inopa mareferensi anobatsira. 168 maseru ari 1.2V rimwe nerimwe, series-akabatana ne201.6V yese. Iyo ECU inobata ese maviri mamodule seimwe yekutarisa unit, ichitevera gumi nemana mayunitsi. Kuronga uku kunoita kuti sisitimu ione kuti ndeipi unit ine dambudziko sero. Same logic inoshanda kune maindasitiri mapack{9}}haugone kupa sero rimwe nerimwe gwara rayo rekutaura, asi unoda granularity yakakwana kuronda nyaya kudzokera kumodule level zvishoma.
Nzira ina dzekuona
Battery pack voltage yekuona yagara munzira ina huru. Vatengi vazhinji vanotaura kune lithium bhatiri pack supplier havabvunze nezve iyi dhata, asi iyi dhata inoisa yakavimbika pasi yeBMS yese.
Relay-uye-Capacitor
Chekutanga irelay-uye-capacitor isolation sampling. Pfungwa yakapusa: capacitor samples voltage kubva muchitokisi, wobva wayera iyo capacitor. Matambudziko ari pachena zvakare-sampling inononoka, kusarongeka zvakanaka, kupfeka kwerelay. Mamwe mapurojekiti ekutanga ekuchengetedza simba akashandisa izvi. Kunyanya kusashanda ikozvino.
Inoyangarara-Pasi
Chechipiri kuona -pasi kunoyangarara. Muenzanisi wehwindo anotarisa kana ikozvino pasi inogona kushanda pakushandura kweA / D; kana zvisiri, D/A inogadzirisa. Miedzo yakanaka mulabhu. Inoputsika mumunda. Forklifts, AGVs-kukanganisa kwemotor drive kunorema zvakanyanya. Ground kugona haarambe akaiswa.
Common-Mode
Chechitatu chakajairika-kuonekwa kwemodhi. Masero ese akayerwa achipesana neimwe referensi poindi, chaiyo resistor divider inoyera zvese pasi, wobva wabvisa kuti uwane yega yega masero voltages. Simple circuit. Asi resistor zvikanganiso zvinoungana. Inoshanda zvakanaka pasi pe8S. Kupfuura izvozvo, chokwadi chinova chisina chokwadi. Iri dambudziko rekuturikidzana haringagadziriswe zvizere-rinobikwa nenzira.
Differential-Modhi
Yechina ndeyekusiyanisa{0}}modhi yekuona. Op-amps ramba zvakajairika-modhi yemagetsi uye meya mutsauko pasero rega rega zvakananga. Kururama kunokunda mamwe matatu nemuganho wakasimba. Kutengeserana{{6}kubvisa kunetsa kwedunhu uye mutengo. Mapakiti pamusoro pe12S anowanzo kupatsanurwa kuita akawanda ekuona mamodule, imwe neimwe inobata chikamu, ichitaurirana mhinduro pamusoro pebhazi. Vazhinji vevagadziri ve lithium bhatiri system vanoita basa reindasitiri vakafambisa nzira iyi.
Iyo Leakage Yazvino Musungo
Zviri nyore kutarisa iyi.
Voltage yekuona maseketi anodhonza ikozvino kubva kumaseru. Zviyero zvidiki{{1}mamicroamps kusvika ku milliamps-asi zvichienderera mberi. Uye heino kubata: mune akateedzana paki, maseru ari padhuze neasina kunaka terminal anotakura yakawedzera kuvuza ikozvino. Tora 16S pack. Sero 1 pamagumo akanaka rinongoona kuvuza kubva kudunhu rayo rekuona. Sero 16 pakupera kwakashata rinoona kukwira kudonha kubva kune ese gumi nematanhatu ekuona maseketi, pamwe neBMS controller, pamwe chero zvimwe zvinongedzo zvinotakura zvisina kunaka.
Kupfuura mazana emacycles, negative-masero ekupedzisira anobuda zvakadzika nekukura nekukurumidza. Consistency drifts. Iri harisi dambudziko remhando yemasero. Idambudziko rekugadzira system.
Magadzirirwo aripo: simudza yekuona yedunhu yekuisa impedance kuti ucheke zvachose kuvuza; wedzera ma switch kuti ubvise nzira dzesampling kana usingayere; kana kungo tarisa masero akakwira zvishoma kune negative-nzvimbo dzekugumisira wogamuchira asymmetry. Kana LiFePO4 bhatiri rekutengesa mutengesi asingakwanise kupindura mibvunzo nezve izvi, mapaketi avo angangoita kukurumidza kusaenzana mumunda. Yakanaka sefa mubvunzo kana iwe uri vetting vatengesi.
Kurongeka uye Nei Zvichikosha Kupfuura Mafungiro Anoratidza
IEC 62619 inoti dziviriro yemagetsi inofanirwa kuita isati yasvika kana kuti sero voltage yasvika pachikumbaridzo chekuchengetedza. Zvinoita sekunge pane margin. Mukuita, hapana zvakawanda.
Tora LFP. Kuchaja kwakazara kutenderedza 3.65V. Nzvimbo yengozi inotanga kutenderera 3.70V. Ndiyo hwindo re50mV. Kana chokwadi chekuziva chiri ±30mV-chinowanikwa mumagadzirirwo akachipa eBMS-chiyero kusavimbika kwega kunodya inopfuura hafu yechengetedzo yako. BMS inoratidza 3.65V, voltage chaiyo inogona kunge yatove 3.68V. Isu tinomhanya ± 5mV mukati. Inoda zvirinani maADCs, mareferensi emagetsi akasimba, kungwarira PCB dhizaini. Mari yakawanda. Asi zvichienzaniswa neicho chinokanganisa kana chokwadi chinotsvedza, chisina kukodzera kutaurwa.
Aive nenyaya: paki yemutengi yakafamba makore maviri, kunyatsoona kwakadonha kubva ± 8mV pakutumirwa kuenda ku ± 35mV. Hapana macode emhosva-drift aiitwa zvishoma nezvishoma. Rimwe zuva panguva yekuchaja, sero rakarova 3.72V uku system ichifunga kuti yaive 3.65V ndokuramba ichienda. Ndakaita rombo rakanaka kuti rusero rwakasimudzwa. Zvikasadaro ndiyo report yechiitiko.
Kukundikana kwerudzi urwu kunovanza zvakanaka. Macheki epagore ekugadzirisa ndiwo mashoma.
Kuenzanisa, Tembiricha, uye Zvimwe Zvese
Kushanda kana kungoita, kuyera kunoshanda chete kana iwe uchiziva kuti ndeapi maseru akakwirira uye akaderera. Kuona zvakaipa zvinoreva kusaona zvakanaka. Passive balancing inobuda ropa kuburikidza nemaresistors. Yakajairika 50mA kuenzanisa ikozvino inotora maawa kudhonza sero rimwe pasi 0.1V. Kana voltage kuyerwa zvikanganiso kutenderedza gwara kunyangwe nguva nenguva, iwe uri kuita kusaenzana zvakanyanya uku uchipisa simba. Paunenge uchiongorora indasitiri yelithium bhatiri mutengesi, bvunza nezve kuenzanisa zano uye kuona chokwadi pamwe chete. "Has active balancing" hazvireve chinhu kana iyo yepasi data iri marara.
Muripo wetembiricha ndechimwe chinhu chisingawanzo kuratidzwa mumashiti chaiwo. Sero imwe chete pa 3.30V inoverenga zvakasiyana pa 25℃maringe ne0℃. Internal resistance inoshanduka, kuyerwa kwedunhu pachayo kunonyura netembiricha. Pasina muripo, fungidziro dzeSOC dzinosiyana mwaka nemwaka. Kudzikira-kuchajisa kunowedzera kuoma-masero pa-5 madhigirii haaite semasero ari mukamuri tembiricha. BMS inongotarisa voltage pasina muchinjika-referencing tembiricha inogona kubvumira kuchaja paisingafanire, kana kuvharira kuchaja pazvinogona. Iwe unofanirwa kubvunza tekiniki yemutengesi zvakananga nezve zvinhu izvi.
Ko Kukundikana Kunoratidzika Sei
Sudden Fault
Matambudziko ekutarisa magetsi anoratidza nzira shoma. Chinonyanya kuoneka imhaka yakaerekana. One cell voltage inoverenga 0V kana yakazara pack voltage. System inokanda kodhi uye inokiya kunze. Zvinogumbura, asi zvirinani sisitimu inoziva chimwe chinhu chakatyoka.
Zvishoma nezvishoma Drift
Worse is drift zvishoma nezvishoma. Miyero yakayerwa inosiyana zvishoma nezvishoma kubva pachokwadi. Hapana macode emhosva. Zvikumbaridzo zvekudzivirira zvakavharwa zvinobudirira. Inogona kutora makore maviri munhu asati azviona{{4}kazhinji nekuti pane chakaipa chakaitika.
Intermittent Contact
Ipapo pane dzimwe nguva dzekubatana nyaya. Vibration inosunungura pfungwa dzewaya dzekubatanidza. Voltage kuverenga kunouya uye kuenda. Dzimwe nguva reproducible, dzimwe nguva kwete. Nightmare kugadzirisa dambudziko.
Voltage yekutarisa inoenda kwakadzika kana iwe uchida kuchera, asi yakakosha poindi iri nyore: iyi ndiyo nheyo yedata yezvese zvimwe zvinoitwa neBMS. Nheyo haina kusimba, hapana chakavakirwa pazvinhu zvepamusoro.
Paunenge uchitsvaga bhatiri mapaketi, usangotarisa huwandu, hupenyu hwekutenderera, mutengo. BMS yekuona chokwadi, mavakirwo ekuona, magadzirirwo emitemo-izvi zvemukati zvine basa rakangofanana. Mibvunzo inogamuchirwa. Takatsika zvimbambaira zvakaringana makore apfuura kuti tive nemafungiro.
