Ithiyori yokushaja nokukhipha i-Lithium & nomklamo wendlela yokubala kagesi
2. Isingeniso imitha yebhethri
2.1 Umsebenzi wokwethulwa kwemitha kagesi
Ukuphathwa kwebhethri kungabhekwa njengengxenye yokuphathwa kwamandla.Ekulawulweni kwebhethri, imitha kagesi inesibopho sokulinganisa umthamo webhethri.Umsebenzi wayo oyisisekelo ukuqapha i-voltage, ukushaja/ukukhipha izinga lokushisa lamanje kanye nebhethri, nokulinganisa isimo sokushaja (i-SOC) nomthamo wokushaja ogcwele (i-FCC) webhethri.Kunezindlela ezimbili ezijwayelekile zokulinganisa isimo sokushajwa kwebhethri: indlela ye-voltage evulekile-circuit (OCV) kanye nendlela ye-coulometric.Enye indlela i-algorithm ye-voltage eguquguqukayo eklanywe i-RICHTEK.
2.2 Vula indlela ye-voltage yesekethe
Kulula ukubona imitha kagesi usebenzisa indlela ye-voltage ye-open-circuit, engatholakala ngokubheka isimo esihambisanayo sokukhokhiswa kwe-voltage evulekile-circuit.I-voltage yesekethe evulekile ithathwa njenge-voltage yetheminali yebhethri lapho ibhethri liphumule ngaphezu kwemizuzu engama-30.
Ijika le-voltage yebhethri izohluka ngomthwalo ohlukile, izinga lokushisa nokuguga kwebhethri.Ngakho-ke, i-voltmeter engaguquki yesifunda evulekile ayikwazi ukumela ngokugcwele isimo sokushaja;Isimo senkokhelo asinakulinganiswa ngokubheka phezulu kwetafula kuphela.Ngamanye amazwi, uma isimo sokukhokha silinganiselwa kuphela ngokubheka phezulu kwetafula, iphutha lizoba likhulu.
Isibalo esingezansi sibonisa ukuthi isimo sokushaja (i-SOC) se-voltage yebhethri efanayo sihluke kakhulu ngendlela ye-open-circuit voltage ngaphansi kokushajwa nokushajwa.
Umfanekiso 5. I-voltage yebhethri ngaphansi kwezimo zokushaja nokukhipha
Kungabonakala emfanekisweni ongezansi ukuthi isimo sokukhokha sihluka kakhulu ngaphansi kwemithwalo ehlukene ngesikhathi sokukhishwa.Ngakho-ke, ngokuyisisekelo, indlela yamandla kagesi eyisiyingi evulekile ifaneleka kuphela kumasistimu adinga ukunemba okuphansi kwesimo sokushaja, njengezimoto ezisebenzisa amabhethri e-lead-acid noma amandla kagesi angaphazamiseki.
Umfanekiso 6. I-voltage yebhethri ngaphansi kwemithwalo ehlukene ngesikhathi sokukhipha
2.3 Indlela ye-Coulometric
Umgomo wokusebenza we-coulometry uwukuxhuma isivimbeli esitholwayo endleleni yokushaja/yokukhipha ibhethri.I-ADC ikala i-voltage ekumelaneni kokutholwa futhi iyiguqule ibe yinani lamanje lebhethri elishajwayo noma elikhishwayo.Ikhawunta yesikhathi sangempela (i-RTC) ingahlanganisa inani lamanje nesikhathi ukuze yazi ukuthi mangaki ama-coulombs agelezayo.
Umfanekiso 7. Imodi yokusebenza eyisisekelo yendlela yokulinganisa i-coulomb
Indlela ye-Coulometric ingabala ngokunembile isimo senkokhelo yesikhathi sangempela phakathi nokushaja noma ukushajwa.Ngekhawunta yokushaja ye-coulomb kanye nekhawunta yokukhipha i-coulomb, ingakwazi ukubala umthamo kagesi osele (RM) kanye nomthamo wokushaja ogcwele (i-FCC).Ngesikhathi esifanayo, umthamo wokushaja osele (RM) kanye nomthamo wokushaja ogcwele (FCC) nawo ungasetshenziswa ukubala isimo sokushaja (SOC=RM/FCC).Ngaphezu kwalokho, ingaphinda ilinganisele isikhathi esisele, njengokuphela kwamandla (TTE) nokugcwala kwamandla (TTF).
Umfanekiso 8. Ifomula yokubala yendlela ye-coulomb
Kunezici ezimbili eziyinhloko ezidala ukuchezuka kokunemba kwe-coulomb metrology.Esokuqala ukunqwabelana kwephutha le-offset ukuzwa kwamanje kanye nesilinganiso se-ADC.Nakuba iphutha lokulinganisa lilincane uma kuqhathaniswa nobuchwepheshe bamanje, uma ingekho indlela enhle yokuliqeda, iphutha lizokhula ngokuhamba kwesikhathi.Isibalo esingezansi sibonisa ukuthi ekusebenzeni okusebenzayo, uma kungekho ukulungiswa ngesikhathi, iphutha eliqoqiwe alinamkhawulo.
Umfanekiso 9. Iphutha elikhulayo lendlela ye-coulomb
Ukuze kuqedwe iphutha eliqoqiwe, kunamaphuzu amathathu esikhathi angenzeka ekusebenzeni kwebhethri evamile: ukuphela kokushaja (EOC), ukuphela kokukhishwa (EOD) nokuphumula (Relax).Ibhethri ishajwe ngokugcwele futhi isimo sokushajwa (i-SOC) kufanele sibe ngu-100% uma isimo sokushaja sesifinyelelwe.Isimo sokuphela kokukhipha sisho ukuthi ibhethri isikhishwe ngokuphelele futhi isimo sokushajwa (SOC) kufanele sibe ngu-0%;Kungaba inani le-voltage eliphelele noma ushintsho ngomthwalo.Uma ifika endaweni yokuphumula, ibhethri ayishajiwe futhi ayishajwa, futhi ihlala ikulesi simo isikhathi eside.Uma umsebenzisi efuna ukusebenzisa isimo esisele sebhethri ukuze alungise iphutha lendlela ye-coulometric, kufanele asebenzise i-voltmeter evulekile yesiyingi ngalesi sikhathi.Isibalo esingezansi sibonisa ukuthi iphutha lesimo sokukhokhiswa ngaphansi kwemibandela engenhla lingalungiswa.
Umfanekiso 10. Imibandela yokuqeda iphutha elikhulayo lendlela ye-coulometric
Isici sesibili esiyinhloko esidala ukuchezuka kokunemba kwendlela ye-coulomb metering yiphutha lomthamo wokushaja ogcwele (FCC), okuwumehluko phakathi komthamo wokuklama webhethri nomthamo wangempela wokushaja ogcwele webhethri.Umthamo wokushaja ogcwele (i-FCC) uzothintwa izinga lokushisa, ukuguga, umthwalo nezinye izici.Ngakho-ke, indlela yokufunda kabusha kanye nesinxephezelo somthamo okhokhiswa ngokugcwele ibaluleke kakhulu endleleni ye-coulometric.Isibalo esingezansi sibonisa ithrendi yephutha le-SOC lapho umthamo ogcwele wokushaja ulinganiswa ngokweqile futhi ulinganiswa kancane.
Umfanekiso 11. Ukuthambekela kwephutha lapho umthamo wokushaja ogcwele ulinganiselwa ngokweqile futhi ulinganiswa kancane
Isikhathi sokuthumela: Feb-15-2023