Kuyini-ukuqapha kwesikhathi sangempela?
I-BMS idinga ukwazi ukuthi kwenzakalani ngaphakathi kwephakethe. I-voltage ngeseli, inani lamanje, amazinga okushisa ezindaweni eziningi. Le datha ingena ngokuqhubekayo, ayithathwa njengesampula kanye ngesikhathi. Lokho ukuqapha{3}}kwesikhathi sangempela.
Ukukalwa kwamandla kagesi
Lapha yilapho izindleko eziningi zihamba khona ngomklamo we-BMS.
Iseli ngalinye noma iqembu elihambisanayo lidinga owalo ulayini wenzwa ye-voltage emuva ku-IC ekupheleni kwe-analog. Okwephekhi le-16S elilawulekayo. Okwephekhi ye-100S+ EV ubheke ama-chips amaningi e-AFE daisy{5}ahlanganiswe ndawonye, ukuxhumana okuhlukile phakathi kwawo, kanye nentambo yokubopha okuthatha umzamo wangempela wokuhambisa umzila ohlanzekile. Ukulandwa komsindo kuyimpi eqhubekayo. Izintambo zenzwa emide zisebenza njengezinti. Amapheya asontekile ayasiza. Ukugcina{10}izindlela zamanje eziphakeme kude nemigqa yenzwa kusiza kakhulu.
Ukunemba kwe-AFE kubaluleke kakhulu kunalokho abantu abakulindele. Amaseli e-NMC angaba no-1.4V webanga le-voltage elisebenzisekayo. Ku-4.2V ugcwele. Ku-4.25V uhlanganisa i-lithium futhi ubulala iseli. Lokho kungu-50mV wemajini. Uma i-AFE yakho inokunemba okungu-±15mV usuvele ushise ngaphezu kwengxenye yesabelomali sakho ngephutha lokulinganisa kuphela. Yingakho amaphekhi{11}}aphezulu kagesi avela kunoma yimuphi umhlinzeki wephakethe lebhethri le-lithium esebenzisa i-AFEs-6815, 6813 ebizayo, leyo tier. Ezishibhile zisebenza kahle kumaphakethe wethuluzi lamandla we-4S. Hhayi okokudonsa.
I-LFP ithethelela kakhulu ekugcineni kodwa ijika le-voltage liphansi kakhulu phakathi kangangokuthi ukulinganisa kwe-SOC kuba nzima. Udinga ukunemba okuhle ngesizathu esihlukile.
Okwamanje
Izinzwa zomphumela wehholo noma ama-shunts. Amahholo ahlukaniswe ngogesi okwenza umklamo ube lula. Amashunti anembe kakhudlwana kodwa ahlala endleleni yamanje, ngakho-ke isifunda senzwa ye-BMS sidinga ukuphatha{2}}imodi yogesi evamile elingana ne-voltage yephakethe. Akuyona into encane kusistimu ye-400V.
Ama-shunts nawo achitha amandla. I-100µΩ shunt ku-500A yehla ngo-50mV bese ishisa ama-25W. Lokho ukushisa okufanele ukuphathe. Futhi ukumelana ne-shunt kuhamba ngezinga lokushisa, ngakho-ke ukufunda kwamanje kuyanyakaza ngaphandle uma unxephezela. Imiklamo ye-BMS eshibhile ayikwenzi. Bese i-SOC ihamba phakathi nosuku futhi akekho owaziyo ukuthi kungani.
Izinga lokushisa
Ama-thermitors ashibhile. Ukubeka ingxenye enzima.
Iphekhi lingase libe namaseli angu-200 kodwa kuphela 6-8 izinzwa lokushisa. Bashonaphi? Amaseli esikhungweni sejiyomethri asebenza ngokushisa kakhulu ngoba azungezwe eminye imithombo yokushisa. Amaseli aseduze ne-casing alahlekelwa ukushisa ngenxa ye-ambient. Amaseli aseduze nezindawo zokucima ukoma athatha ukushisa okuqhutshiwe okuvela ekuxhumekeni kwamanje. Umkhiqizi wesistimu yebhethri ye-lithium owenza lokhu usebenzisa kahle i-CFD noma okungenani imodeli eshisayo eyenziwe lula ngaphambi kokuzibophezela ezindaweni zokuzwa. Abanye babeka i-thermistor eyodwa ngemojuli futhi bathemba okungcono kakhulu.
Inzwa kufanele ithinte iseli. Ungantanti emoyeni eduze kweseli. Izinga lokushisa lomoya ngaphakathi kwendawo ebiyelwe alikutsheli lutho mayelana nezinga lokushisa lendawo yeseli. Sibone umehluko we-8-10℃phakathi komoya nendawo yeseli kumaphakethe abebukeka kahle ephepheni.
I-Thermal interface ibalulekile futhi. Ukuxhumana okomile phakathi kwe-thermistor neseli kungaba nokumelana nokushisa okuphezulu. Ukufundwa kubambezela iqiniso. Ngesikhathi inzwa ikhombisa amadigri angu-45 iseli kungenzeka selivele liku-52℃futhi liyakhuphuka.
Okwenziwa yi-BMS Ngedatha
Ukulinganisa kwe-SOC yinto esemqoka. Ukubala kwe-Coulomb kuhlanganisa okwamanje ngokuhamba kwesikhathi. Ukubheka kwe-OCV kuhlobanisa i-voltage yokuphumula esimweni sokushaja. Izihlungi ze-Kalman noma okufanayo kuhlanganisa kokubili. Akukho kulokhu okusebenza kahle. I-Coulomb counting drifts ngenxa yokuthi ukukalwa kwamanje akuphelele futhi ngeke wazi indawo yokuqala yangempela. Ukubheka i-OCV kudinga iphakethe ukuze liphumule isikhashana okuyinto engenzeki ekusebenzeni okuqhubekayo. Isihlungi se-Kalman siyasiza kodwa sihle kuphela njengemodeli yeseli esakhelwe phezu kwayo, namaseli ayaguga.
Isilinganiso se-SOH silandelela ukucekelwa phansi. Amandla ayafiphala, ukukhula kokumelana. Lokhu ngokuvamile kusho ukusebenzisa inkokhiso elawulwayo ngezikhathi ezithile noma ukukhulula futhi kuqhathaniswe nesisekelo. Amanye amasistimu azama ukuyilinganisela ku-inthanethi ngedatha yokusebenza. Imiphumela iyahlukahluka.
I-logic yokuvikela ilula. I-voltage iphezulu kakhulu, yeka ukushaja. Kuphansi kakhulu, yeka ukukhipha. Okwamanje iphakeme kakhulu, nqamula. Izinga lokushisa liphezulu kakhulu, nciphisa noma nqamula. Lezi yiziqhathaniso zomkhawulo. Ukulungisa ama-threshold kuthatha umcabango-kuqine kakhulu futhi ungamanga{7}}uhambo njalo, uxege kakhulu futhi uvumela amaseli ukuthi alimale.
Ukulinganisa
Amaseli ayahlukana ngokuhamba kwesikhathi. Ukulinganisa okwenziwayo kushisa inkokhiso eyeqile ngokusebenzisa izinto eziphikisayo, ngokuvamile ku-50-100mA. Ihamba kancane. Phakathi nomjikelezo wokushaja wamahora angu-4 ukulinganisa okunganyakazi kungase kuhambe ku-200-400mAh. Uma amaseli akho engu-2000mAh engaphandle kwebhalansi lokho ngeke kukunqamule.
Ukudlulisa okusebenzayo kokulinganisa okusebenzayo kushaja phakathi kwamaseli kusetshenziswa ama-inductors noma ama-capacitor. Ngokushesha kakhulu, esebenza kahle kakhulu, ebiza kakhulu, eyinkimbinkimbi kakhulu. Ngezixazululo zebhethri ye-lithium yezimboni lapho amaphekhi ejikeleza kanzima nsuku zonke, ukulinganisa okusebenzayo kunengqondo. Ephaketheni elihlala ku-50% SOC isikhathi esiningi elisetshenziswa ngezikhathi ezithile, ukungenzi lutho kulungile.
Ukuxhumana
CAN ibhasi lezimoto. Modbus for umile. Zombili ziyasebenza. Khetha noma yini enye isistimu eyisebenzisayo.
Ukuxhumana kwamafu kuzwakala kukuhle ephepheni. Empeleni uhhafu wamasayithi anesignali yeselula kadoti futhi isifaki asizange senze isabelomali sothi lwangaphandle. Ukungena kwedatha yendawo ngokulayishwa ngezikhathi ezithile kusebenza kangcono ekusetshenzisweni okuningi kwebhethri ye-lithium yezentengiso kunokucabangela ukuxhumana okungapheli.
Amazinga
I-ISO 6469 kanye ne-UN ECE R100 yezimoto. UL 9540 yokugcina umile. I-OSHA namakhodi omlilo wendawo wezindawo zokushaja zezimboni. Uzakwethu we-OEM yebhethri le-lithium kufanele azi ukuthi yimaphi asebenza emakethe yakho eqondiwe. Izidingo zokuqapha ukuzihlukanisa ezindinganisweni zezimoto zikhuphula abantu ngaphezu kwanoma yini enye ekukhiqizweni kwevolumu.
Ukuqapha{0}}kwangempela isikhathi akuyona inketho. Umbuzo uwukuthi udinga ukunemba nokuyinkimbinkimbi kangakanani, futhi lokho kuncike kumaseli, isicelo, kanye nemiphumela yokukwenza kungalungile.
