Ukuze uzuze ukonga amandla nokuvikelwa kwemvelo, izinguquko zebhethri ye-lithium-ion, ingabe indlela yokuhlola umehluko?

2022/04/08

Umbhali :Iflowpower -Umhlinzeki Wesiteshi Samandla Esiphathekayo

Ngokuthuthuka okusheshayo kwamaselula, amadivaysi ahlakaniphile angenawaya nezimoto zikagesi, isidingo semakethe samabhethri e-lithium siya ngokuya siba banzi, kanye nokusebenza kahle kokukhiqizwa kwamabhethri e-lithium kuya ngokuya kuya phezulu. Ngesikhathi esifanayo, ngenxa yesidingo sokulondoloza amandla nokunciphisa ukukhishwa, ibhethri ye-lithium yenziwe ngamakhemikhali, ukushaja, ukukhishwa, kanye nenani elikhulu lempendulo yamandla, amandla okukhishwa kwebhethri ye-lithium, impendulo emuva kumandla kagesi. , kanye namanye amabhethri ukuze kuzuzwe ukonga amandla nokuvikelwa kwemvelo. Ukuze uthole ngokunembe kakhudlwana umthamo webhethri le-lithium, izidingo zephutha zesilinganiso samanje se-voltage yokushaja kanye nokukhishwa kwebhethri ye-lithium nazo zithuthukisiwe kakhulu, futhi amakhasimende amaningi adinga ukufinyelela ku-50% wokunemba kwephutha, ukuze sonke isilawuli sokulinganisa siyalawulwa.

Izidingo zephutha ze-amplifier, i-ADC, ne-DAC kusekethe nazo ziyathuthuka. Ngokuvamile, ibhethri ye-lithium ephelele yempendulo yamandla ihlukaniswe ngesakhiwo sezinga elingu-3. Njengoba kukhonjisiwe ngezansi: Izinga lokuqala lingu-220, 380VAC ukuya ku-400-500VDC okuguqula izindlela ezimbili, izinga lesibili liyi-converter yezindlela ezimbili ze-400VDC kuya ku-12VDC, i-level yesithathu engu-12VDC kuya ku-5VDC i-converter yezindlela ezimbili, ukushaja nokukhipha ibhethri ngqo.

Amandla athile ancike ekushajweni kwebhethri nobukhulu bokushajwa kanye nenani lamabhethri. Nge-TI's C2000TMS320F280XX, kulula ukusebenzisa amazinga okuqala kanye nesibili okusebenza, futhi izinga lokuqala nelesibili lingahlanganiswa, futhi i-220VAC kuya ku-12VDC ingafinyelelwa ngokuqondile, kunciphise nakakhulu i-Chen Ben. Kuziguquli zezindlela ezimbili zezigxobo zesithathu ze-12VDC ukuya ku-5VDC, uhlelo lokulawula iluphu yokulingisa ngokuvamile luyamukelwa, futhi sizophinde sethule isingeniso sohlelo lwedijithali lwe-C2000.

Isibalo esingenhla siwumklamo wereferensi wesikimu sokulawula iluphu esilingisiwe se-Ti, futhi siwuhlelo lwedivayisi oluhlukile okwamanje olubiza kakhulu kunamakhasimende amaningi. I-TL594 isebenzisa isilawuli se-PWM, i-LM5106 iyidrayivu ye-MOSFET eyi-half-bridge. I-LM5060 isilawuli sokuhlehla kwebhethri.

Ukuqoqwa kwe-voltage yamanje enembe kakhulu nokulungiswa kweluphu, ikakhulukazi ukuqaliswa kwe-INA225 ne-OPA180. I-INA225 iyisikhulisamazwi somtshina samanje esizinikezele esihlanganiswe nezinto eziphikisana nenzuzo yangaphandle, esihlinzeka ngokukhipha inzuzo engaguquki, esinikeza izici ezinhle kakhulu zokuntanta kwezinga lokushisa kuyilapho kwenziwa lula amasekhethi; futhi i-INA225 iwukusebenzisa okuzenzakalelayo kokutholwa kwamanje kwezindlela ezimbili ngaphandle kwamasignali okulawula engeziwe Kulula kakhulu ukuyisebenzisa. I-OPA180 iyazinza, izinga lokushisa eliphansi liyantanta, yenza ukulungiswa kwe-PID ne-CV, ukulawula kwe-CC.

I-ADCADS1248 yangaphandle i-24-bit D-SADC yokuqoqa ama-voltage wamanje wokushaja nokuwakhipha, ingabambi iqhaza ekulawuleni iluphu. I-ADS1248 ingakala i-voltage yamanje yamashaji ebhethri eziteshi ezi-4, uma wengeza ukushintsha kwangaphandle, ungakala okwengeziwe, uzuze ukusebenza kwezindleko ezingcono. I-DAC80004 iyi-16-bit DAC ukuze usethe amandla kagesi wokushaja nokukhipha.

Iphutha layo elinguziro lingaphansi kuka-2mV, elingafinyelela izilungiselelo zomkhawulo wamanje wokushaja okuphansi. Isihluthulelo salo mklamo wereferensi ukulawula okufudumele. Ubukhulu bezimpawu ezintantayo ezisezingeni eliphansi bubaluleke kakhulu.

I-Ti's INA225, INA240 yizikhulisi ezikhethekile zokutholwa kwezinga lokushisa eliphansi lokushisa, futhi iphutha lokuzuza lingaphansi kuka-2.5ppm. Ngaphezu kwalokho, izinga lokushisa lokumelana nesampula liphinde linqume ngokuqondile izinga lokushisa lohlelo, ukumelana nesampula kwe-20 ppm kube kuhle kakhulu.

Lapho kwenziwa isampula yamanje, ukumelana kungumthombo wokushisa wamandla, okuzobangela ngokuphawulekayo ukukhuphuka kwezinga lokushisa kwe-PCB ezungezile, konakalise izinga lokushisa. Umthelela, ngakho-ke ipuleti lepuleti le-PCB lamasampula resistors libaluleke kakhulu. Idizayini yesithenjwa ye-TI - Idatha ye-PMP40182 nedatha yokuhlola kufakwe ku-inthanethi, kunesidingo sokuya kuwebhusayithi esemthethweni ye-Ti ukuze uyilande.

Ngokuduma kwe-Ti's C2000DSP, onjiniyela abaningi ngokwengeziwe baye bazama ukusebenzisa i-C2000 ukufeza ukushaja kwebhethri yezindlela ezimbili kanye nokulawulwa kokukhipha kwe-12V kuya ku-5V, 10A, ngaleyo ndlela kuzuzwe sonke isixhumanisi, kusukela ku-220VAC kuya ku-5VDC ukuguqulwa okugcwele kwedijithali yedijithali. . Umdwebo wohlelo lwe-12V ukuya ku-5VDC kabilirectional DC-DC ye-C2000. I-TMS320F2837X, CC, CV loop control yakamuva isetshenziswa yi-Ti, esetshenziswa isoftware ye-C2000.

I-PWM (HRPWM) enembayo ephezulu ye-F2837X ingafinyelela ukunemba okuphezulu (> 16 bits) komsebenzi we-DAC + PWM, ayikho i-DAC yangaphandle; I-F2837X isahlanganiswe ama-ADC amaningi we-16-bit, futhi ayikho i-ADC yangaphandle, ukutholwa kwamanje kwangaphandle kanye nokukhulisa. Ngomklamo we-F2837X, ingenza ukwakheka kwesekethe kube lula, inikeze ukuthembeka okuphezulu nezici ezishisayo ezintantayo. I-F2837X eyodwa ingase ibe phezulu, kodwa i-F2837X ingasekela ukushajwa nokukhishwa kwamabhethri amaningi, aphansi kakhulu esiteshini ngasinye.

Ngokuvamile, i-TI inganikeza isethi egcwele yezixazululo zezingxenye zesimanje ezisekelwe kubhethri ukuze isize amakhasimende axazulule izinkinga zobuchwepheshe ocwaningweni nasekuthuthukisweni, futhi aphushele imikhiqizo emakethe ngesivinini esisheshayo.

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