Iphakethe lebhethri lingakhiwa ngokuxhuma amabhethri e-lithium amaningana ochungechungeni, angakwazi kuphela ukunikeza amandla emithwalweni ehlukahlukene, kodwa futhi angashajwa ngokujwayelekile ngeshaja efanayo.Amabhethri e-lithium awadingi noma iyiphi isistimu yokuphatha ibhethri (BMS) ukuthi ishaje futhi ikhishwe.Manje kungani wonke amabhethri e-lithium emakethe engezwa nge-BMS?Impendulo iwukuphepha nokuphila isikhathi eside.
Isistimu yokuphatha ibhethri i-BMS (Isistimu Yokulawula Ibhethri) isetshenziselwa ukuqapha nokulawula ukushajwa nokushajwa kwamabhethri aphinde ashajwe.Umsebenzi obaluleke kakhulu wesistimu yokuphatha ibhethri ye-lithium ye-BMS ukuqinisekisa ukuthi ibhethri lihlala ngaphakathi kwebanga lokusebenza eliphephile kanye nokuthatha isinyathelo esisheshayo uma ibhethri elilodwa liqala ukweqa umkhawulo.Uma i-BMS ithola ukuthi i-voltage iphansi kakhulu, izonqamula umthwalo, futhi uma i-voltage iphezulu kakhulu, yinqamule ishaja.Izophinde ihlole ukuthi iseli ngalinye ephaketheni line-voltage efanayo bese yehlisa noma iyiphi ephakeme kunamanye amaseli.Lokhu kuqinisekisa ukuthi ibhethri ayifinyeleli kumandla kagesi aphakeme noma aphansi ngokuyingozi - ngokuvamile okuyimbangela yokusha kwebhethri ye-lithium esiyibona ezindabeni.Ingakwazi ngisho nokuqapha izinga lokushisa lebhethri futhi inqamule iphakethe lebhethri ngaphambi kokuthi lishise kakhulu bese livutha.Ngakho, uhlelo lokuphatha ibhethri i-BMS ukugcina ibhethri livikelekile kunokuthembela eshajani enhle noma esenzweni esilungile somsebenzisi.
Kungani amabhethri e-lead-acid (AGM, amabhethri ejeli, umjikelezo ojulile, njll.) engadingi isistimu yokulawula ibhethri?Izingxenye zamabhethri e-lead-acid azikwazi ukuvutha futhi mancane kakhulu amathuba okuthi zibambe umlilo uma kunenkinga ngokushaja noma ukushajwa.Kodwa isizathu esiyinhloko sihlobene nokuziphatha lapho ibhethri selishajwe ngokugcwele.Amabhethri e-lead-acid nawo enziwe ngamaseli axhunywe ochungechungeni;uma iseli elilodwa lishajelwe ngaphezudlwana kwamanye amaseli, lizovumela kuphela amandla ukuthi adlule kuze kube yilapho amanye amaseli eseshajwe ngokugcwele, kuyilapho igcina i-voltage enengqondo iyodwa, njll. Amabhethri abamba phezulu.Ngale ndlela, ibhethri le-lead-acid "liyazilinganisa" njengoba lishaja.
Amabhethri e-lithium ahlukile.I-electrode ephozithivu yebhethri ye-lithium eshajwayo ngokuvamile i-lithium ion material.Umgomo wayo wokusebenza unquma ukuthi phakathi nenqubo yokushaja nokukhipha, ama-electron e-lithium azogijima ezinhlangothini zombili zama-electrode amahle nangalungile kaninginingi.Uma i-voltage yeseli eyodwa ivunyelwe ukuba ibe ngaphezu kwe-4.25v (ngaphandle kwebhethri ye-lithium ephezulu ye-voltage), isakhiwo se-anode microporous singase siwohloke, i-hard crystalline material ingase ikhule futhi ibangele isifunda esifushane, bese izinga lokushisa lizokhuphuka ngokushesha. , okuyogcina kuholele emlilweni.Lapho iseli ye-lithium ishajwe ngokugcwele, i-voltage ikhuphuka ngokuzumayo futhi ingafinyelela ngokushesha emazingeni ayingozi.Uma i-voltage yeseli kuphakethe lebhethri iphakeme kunamanye amaseli, leli seli lizoqala lifinyelele amandla kagesi ayingozi phakathi nenqubo yokushaja, futhi ivolumu iyonke yephakethe lebhethri alikafinyeleli inani eligcwele ngalesi sikhathi, ishaja izokwazi angayeki ukushaja .Ngakho-ke, ingqamuzana lokuqala elifinyelela amandla kagesi ayingozi libeka ingozi yokuphepha.Ngakho-ke, ukulawula nokuqapha i-voltage iyonke yephakethe lebhethri akwanele kumakhemistri asekelwe kwi-lithium, i-voltage yeseli ngayinye eyenza iphakethe lebhethri kufanele ihlolwe yi-BMS.
Ngomqondo omncane, isistimu yokuphatha ibhethri ye-BMS isetshenziselwa ukuvikela amaphakethe amakhulu ebhethri.Ukusetshenziswa okuvamile amabhethri anamandla e-lithium iron phosphate, anemisebenzi yokuvikela njengokushajwa ngokweqile, ukukhishwa ngokweqile, i-overcurrent, i-short circuit, kanye nebhalansi yeseli.Izimbobo zezokuxhumana, okokufaka kwedatha nezinketho zokuphumayo kanye neminye imisebenzi yokubonisa kuyadingeka.Isibonelo, ukuxhumana kokuxhumana kwe-BMS eyenziwe ngezifiso kaXinya kungokulandelayo.
Ngomqondo obanzi, i-Protection Circuit Board (PCB), ngezinye izikhathi ebizwa ngokuthi i-PCM (Protection Circuit Module), iwuhlelo lokuphatha ibhethri olulula lwe-BMS.Ivamise ukusetshenziselwa amaphakethe ebhethri amancane.Ivamise ukusetshenziselwa amabhethri edijithali, njengamabhethri omakhalekhukhwini, amabhethri ekhamera, amabhethri e-GPS, amabhethri ezingubo zokushisisa, njll. Isikhathi esiningi, isetshenziselwa iphakethe lebhethri elingu-3.7V noma elingu-7.4V, futhi linemisebenzi emine eyisisekelo yokushajwa ngokweqile, i-overdischarge, i-overcurrent, ne-short circuit.Amanye amabhethri angase adinge i-PTC ne-NTC.
Ngakho-ke, ukuqinisekisa ukuphepha kanye nempilo ende yesevisi yamaphakethe ebhethri ye-lithium, isistimu yokuphatha ibhethri ye-BMS enekhwalithi ethembekile iyadingeka ngempela.
Isikhathi sokuthumela: Mar-31-2022