Yintoni i-Overvoltage?
Ndifumene umnxeba ovela kumdibanisi wepakethi e-Ohio ngoLwesibini odlulileyo. Babenepakethe ye-14S LFP eyabuya kwi-solar install kunye neeseli ezimbini ezifunda i-3.91V. LFP. Akufanele ubone nantoni na engaphezulu kwe-3.65V kusetyenziso oluqhelekileyo. Izisele zazibonakala zilungile ngaphandle kodwa xa sasiqhekeza esinye sivuleka ifoyile yecathode yayijike yaba mdaka emaphethelweni. Umonakalo wentlawulo egqithisileyo.
Kwavela ukuba bebesebenzisa itshaja ye-asidi ekhokelela{{0}. Umthengi wayitshintshisa ngenxa yokuba eyokuqala yafa. Itshaja ye-asidi - 48V ibeka ngaphandle i-58.4V ukudada. Kwipakethi ye-14S LFP esebenza kwi-4.17V ngeseli nganye. Ayiyongxaki kwi-lead{10}}asidi. Ingxaki enkulu ye-LFP.
Olu hlobo lwento lwenzeka ngaphezu kokuba abantu bevuma.
Ugqithiso lombane luthetha ukutyhala iseli igqithise ivoltheji yayo ephezulu ekalikelweyo. Inani lixhomekeke kwikhemistri. I-NMC kunye ne-NCA phezulu kwi-4.20V. Ezinye -izahlukano eziphezulu ze-NMC zithelekelelwa kwi-4.35V kodwa ezo ziiseli ezikhethekileyo kwaye kufuneka wazi ukuba wenza ntoni ngazo. Ikhemistri ye-LFP inesilingi ye-3.65V. I-LTO ijikeleze i-2.85V. La manani avela kwidatha yedatha yomthengisi. Ungawahoyi kwaye uya kuba neengxaki.
Ukuthotywa kweeseli zangaphakathi
Into eyenzekayo ngaphakathi kwiseli xa i-overvoltage ayikho nzima. Izinto ze-cathode zifuna ukuyeka i-oksijini xa unyanzelisa i-lithium eninzi kuyo. Loo oksijini isabela kunye ne-electrolyte. Ngeli xesha isinyithi se-lithium siqala ukugquma kumphezulu we-anode kuba igraphite ayikwazi ukufunxa ii-ion ngokukhawuleza ngokwaneleyo. I-plating imbi ngenxa yezizathu ezibini. Ilahleko yesakhono engenakulungiseka kwaye idala i-dendrites enokuthi ekugqibeleni ibe mfutshane kwiseli ngaphakathi.
Uninzi lwabantu lucinga ukuba kukho umda owakhelwe kwi-4.20V spec. Akukho nto.
Abavelisi beeseli babeka loo mda kwindawo apho ukuthotywa kungamkelekanga. Ukuya kwi-4.25V kanye mhlawumbi kulungile. Ukuya apho umjikelo ngamnye uya kubulala iseli kwimijikelo engamakhulu ambalwa endaweni yamawaka ambalwa. Ukuhamba ngaphezulu kwe-4.30V kwaye usenokungafumani imijikelo engamakhulu ambalwa. Ndibone iiseli zidumba kwi-4.35V emva kwentlawulo enye. Kuxhomekeke kwiseli.
Indima ye-BMS
I-BMS ifanele ukukubamba oku. Iseli nganye ekwipakethi ifumana ucingo lwayo lwengqiqo. I-chip ye-AFE ifunda zonke ii-voltages zeseli kwaye ithelekise ngokuchasene nomda. Ukuba nayiphi na iseli iyadlula, iyayeka ukutshaja. Ilula kakhulu.
Ngaphandle kokuba i-BMS inokusilela. Ndibone iibhodi ze-BMS ezineendawo ezibandayo ze-solder kwizihlanganisi zocingo. Iseli enye iyeka ukunika ingxelo kwaye i-firmware iyagqibeka ibe ngu-zero endaweni yokubonisa impazamo. Ndibone iitshiphusi ze-AFE eziphuma kwi-cal ngaphezulu kobushushu. I-TI's BQ76940 yomelele ngokubanzi kodwa i-BQ76925 endala yayinemiba yokutshintsha kwesalathiso sangaphakathi. Iitshiphusi ze-AFE zaseTshayina ezishibhile zinokuba kuyo yonke indawo.
Ukulungelelanisa izinto ngaphezu kokuba abantu becinga. Ipakethi eneeseli ezilishumi kuthotho iya kuba nokusasazeka kwinqanaba. Iseli enye ibetha ngokupheleleyo phambi kwezinye. Ukuba i-bancing icotha kakhulu iseli ephezulu ihlala kwi-4.20V ngelixa i-current iqhubeka nokungena kwipakethi. Amandla ombane akuloo seli anyukela phezulu. Ngokulungelelaniswa kwe-passive uthintelwa bubungakanani bobushushu obunokubuchitha kwizinto ezixhathisa ukopha. Uninzi loyilo luqhuba i-50mA ukuya kwi-100mA ibhalansi yangoku. Ukuba iiseli zakho azihambelani ngaphezu kweepesenti ezimbalwa ezinokuthi zingonelanga.
Ulungelelwaniso olusebenzayo luhambisa intlawulo ukusuka kwiiseli eziphezulu ukuya kwiiseli ezisezantsi endaweni yokuyitshisa. Ebiza kakhulu. Ngobunzima ngakumbi. Yenza ingqiqo kwiipakethi ezinkulu apho amandla achithwayo adibanisa okanye kwizicelo apho awukwazi ukunyamezela naluphi na ukusasazeka kwamandla.
Uyilo lwetshaja sesinye isiqingatha senxaki. Isiguquli esitshintshayo esinommiselo wengxelo engacacanga siya kudlula kumthwalo okhanyayo. Ndilinganise iitshaja ezikhupha i-42.5V xa ipakethe itsala ngaphantsi kwe-100mA kufutshane nesiphelo sentlawulo. Eso siqingatha sevolti esongezelelweyo esisasazwe kwiiseli ezilishumi yi-50mV inye. Hayi intlekele kodwa yongeza kunye nezinye ukunyamezelana.
Imbuyekezo yobushushu kwitshaja ibalulekile nayo. Iiseli zeLithium kufuneka zihlawule kumbane ophantsi xa kushushu. Ezinye iitshaja zilungelelanisa indawo yokubeka iCV ngokusekwe kwisixhobo sokushisa umlilo. Uninzi lwexabiso eliphantsi abenzi njalo. Ipakethi ehleli elangeni kwi-45C ihlawuliswa ukuya kwi-4.20V eqhelekileyo ngeseli ihlawuliswa ngokugqithisileyo.
Imigangatho emibini yokukhusela ingcono kunomnye. I-BMS ijonga umbane weeseli. I-IC yokhuseleko lwesibini inokubukela i-voltage yokupakisha kwaye isike i-FET ukuba kukho into engahambi kakuhle. Kwipakethe yaseOhio eyaqala le ngxoxo yonke, kwakungekho nto. Babene-BMS engathethiyo eyenza ukulinganisa kuphela. Akukho khuselo. Umthengi ucinge ukuba itshaja iya kuyiphatha. Ingcinga embi.
Uluhlu lokuHlola loYilo
Ukuba uyila iipakethi uluhlu lokutshekisha lufutshane kakhulu.
- Sebenzisa i-BMS eneseli yokwenyani-inqanaba le-OVP.
- Misela umda ngomda othile, mhlawumbi i-4.18V ye-NMC.
- Qinisekisa ukuba ibhalansi inokuqhubeka nokusasazeka kweseli yakho.
- Yenza ukuba itshaja ifaneleke kuyo yonke imvulophu yayo yokusebenza hayi nje kwiqondo lobushushu begumbi kwibhentshi.
- Yongeza indlela yesibini yokhuseleko ukuba isicelo siyayithethelela.
Ipakethe yaseOhio iyakhiwa kwakhona ngeBMS eyiyo kunye netshaja exeliweyo ye-LFP. Isifundo esixabisa kakhulu. Inokuba worse. Akukho mntu wenzakalayo kwaye akukho nto ibambekayo ngomlilo. Asoloko ephela ngolo hlobo la mabali.
