Chii Chaiyo-Kuongorora Nguva?
BMS inoda kuziva zviri kuitika mukati mepakeji. Voltage pasero, yakazara ikozvino, tembiricha panzvimbo dzakawanda. Iyi data inogara ichiuya, kwete sampuli kamwe panguva. Ndiyo nguva chaiyo-kutarisa.
Voltage Measurement
Apa ndipo panowanikwa mari zhinji muBMS dhizaini.
Sero rega rega kana boka rakafanana rinoda rayo remagetsi pfungwa mutsara kudzokera kune analog kumberi kumagumo IC. Yepakeji ye16S inogoneka. Kune 100S+ EV pack uri kutarisa akawanda AFE machipi daisy{5}akasungwa pamwe chete, ari ega kutaurirana pakati pawo, uye tambo yewaya inotora simba chairo kuti ifambe zvakachena. Kutora ruzha kurwa nguva dzose. Waya dzepfungwa dzakareba dzinoita sema antennas. Zviviri zvakamonyoroka zvinobatsira. Kuchengeta{10}nzira dzazvino dziri kure nemitsara yepfungwa zvinobatsira zvakanyanya.
Iyo AFE yekurongeka inokoshesa zvakanyanya kupfuura zvinotarisirwa nevanhu. NMC maseru ane pamwe 1.4V yeusable voltage renji. Pa4.2V iwe uzere. Pa4.25V urikuputira lithium nekuuraya sero. Ndiyo 50mV yemargin. Kana AFE yako iine ± 15mV kurongeka iwe wakatopisa neinodarika hafu bhajeti yako pakuyerwa kukanganisa chete. Ndokusaka-voltage packs akakwira kubva kune chero emhando yelithium battery pack anoshandisa inodhura AFEs-6815, 6813, that tier. Iwo akachipa anoshanda zvakanaka kune 4S simba rekushandisa mapakeji. Kwete zvekudhonza.
LFP inonyanya kuregerera pamusoro pekupedzisira asi iyo voltage curve yakati sandara pakati zvekuti fungidziro yeSOC inooma. Iwe unoda kurongeka kwakanaka kune chimwe chikonzero.
Current
Hall effect sensors kana shunts. Dzimba dzakaparadzaniswa nemagetsi izvo zvinorerutsa dhizaini. Shunt dzakanyatsojeka asi dzinogara munzira yazvino, saka sevhisi yeBMS inoda kubata common-mode voltage yakaenzana nepack voltage. Kwete zvishoma pane 400V system.
Shunts dzinobvisawo simba. A 100µΩ shunt pa 500A inodonha 50mV uye inopisa 25W. Ndiko kupisa kwaunofanira kutonga. Uye shunt kuramba inodonha nekudziya, saka kuverenga kwazvino kunodonha zvakare kunze kwekunge iwe uchibhadhara. Cheap BMS magadzirirwo haaite. Ipapo SOC inofamba pamusoro pekufamba kwezuva uye hapana anoziva chikonzero.
Tembiricha
Thermitors zvakachipa. Kuiswa ndicho chikamu chakaoma.
Paki inogona kunge iine mazana maviri maseru asi 6 chete-8 ma sensor tembiricha. Vanoendepi? Masero ari mugeometric centre anopisa zvakanyanya nekuti akakomberedzwa nezvimwe zvinopisa. Masero ari pedyo necasing anorasikirwa nekupisa kusvika paari. Masero ari padhuze nemabhazi anotora kupisa kwakaitiswa kubva kune yakakwirira-ikozvino kubatanidza. Lithium bhatiri system inogadzira ichiita izvi nemazvo inomhanyisa CFD kana ingangoita yakareruka yekupisa modhi isati yaenda kunzvimbo dzekunzwa. Vamwe vese vanoisa imwe thermistor pane module uye tariro yezvakanakisa.
Iyo sensor inofanirwa kubata sero. Kwete kuyangarara mumhepo pedyo nesero. Tembiricha yemhepo mukati meyakavharika inokuudza chero chinhu nezve tembiricha yepasi pesero. Takaona 8-10 madhigirii mutsauko pakati pemhepo nesero pamusoro mumapakiti aitaridzika zvakanaka pabepa.
Thermal interface zvinhu zvine basa zvakare. Kusangana kwakaoma pakati pe thermistor nesero kunogona kuve nekukwirira kupisa kwekupisa. Kuverenga kunononoka chokwadi. Panguva iyo sensor inoratidza 45 dhigirii sero rinogona kunge ratova pa52℃uye kukwira.
Zvinoitwa neBMS neData
Kufungidzira kweSOC ndicho chinhu chikuru. Coulomb kuverenga kunobatanidza ikozvino nekufamba kwenguva. OCV yekutarisa inobatanidza kuzorora kwemagetsi kune mamiriro ekuchaja. Kalman mafirita kana akafanana anosanganisa iwo maviri. Hapana chimwe cheizvi chinoshanda zvakakwana. Coulomb kuverenga inodonha nekuti kuyerwa kwazvino hakuna kukwana uye haungamboziva chokwadi chekutangira. OCV yekutarisa inoda iyo paki kuti izorore kwechinguva izvo zvisingaitike mukuenderera kushanda. Iyo Kalman sefa inobatsira asi yakanaka chete sero modhi yakavakirwa pairi, uye maseru anokura.
SOH fungidziro inoteedzera kudzikisira. Kugona kupera, kuramba kukura. Izvi zvinowanzoreva nguva nenguva kumhanyisa chaji inodzorwa kana kuburitsa uye kuenzanisa nekutanga. Mamwe masisitimu anoedza kuzvifungira pamhepo kubva kune data inoshanda. Mibairo inosiyana.
Dziviriro logic iri nyore. Voltage yakawandisa, rega kuchaja. Kunyanya kuderera, rega kuburitsa. Izvozvi zvanyanya kukwira, bvisa. Tembiricha yakakwira zvakanyanya, dhiraivha kana kudzima. Izvi zvingori zvimiro zvekuenzanisa. Kugadzirisa zvikumbaridzo kunoda kufunga-zvakanyanya uye unonyepa-kufamba nguva dzose, wakasununguka uye unorega maseru achikuvadzwa.
Kuenzanisa
Masero anoparara nekufamba kwenguva. Passive balancing inopisa kubhadharisa yakawandisa kuburikidza nevanopikisa, kazhinji pa50-100mA. Inononoka. Munguva ye4-awa yekuchaja kutenderera passive balancing inogona kufamba 200-400mAh. Kana maseru ako ari 2000mAh kunze kwechiyero izvo hazvisi kuzozvicheka.
Active balancing inotamisa kuchaja pakati pemaseru uchishandisa inductors kana capacitors. Zvakanyanya kukurumidza, zvakanyanya kushanda, zvinodhura, zvakanyanya kuoma. Kune maindasitiri lithium bhatiri mhinduro uko mapaketi anotenderera zvakaomarara zuva nezuva, inoshanda kuenzanisa zvine musoro. Kune paki inogara pa50% SOC nguva zhinji neapo neapo kushandiswa, passive yakanaka.
Kukurukurirana
CAN bhazi remotokari. Modbus yekumira. Zvose zvinoshanda. Sarudza chero iyo yasara system inoshandisa.
Cloud yekubatanidza inonzwika zvakanaka pabepa. Mukuita hafu yemasaiti ane marara cellular siginecha uye mugadziri haana kuita bhajeti rekunze antenna. Kudhirowa kwedata remunharaunda ne periodic upload kunoshanda zvirinani kune mazhinji ekutengesa lithium bhatiri mupi wekutumira pane kufungidzira kunogara kunobatanidza.
Mitemo
ISO 6469 uye UN ECE R100 yemotokari. UL 9540 yekuchengetedza yakamira. OSHA uye makodhi emoto emunharaunda enzvimbo dzekuchaja maindasitiri. A lithium bhatiri OEM mudiwa anofanirwa kuziva kuti ndedzipi dzinoshanda kumusika wako waunoda. Izvo zvinodikanwa zvekuzviparadzanisa nevamwe mumitambo yemotokari zvinokwidza vanhu kupfuura chero chinhu chipi zvacho mukugadzirwa kwevhoriyamu.
Kuongorora-nguva chaiyo hakusi kusarudzwa. Mubvunzo ndewekuti kurongeka kwakadii uye kuoma kwaunoda, uye izvo zvinoenderana nemaseru, mashandisirwo, uye mhedzisiro yekuikanganisa.
