Umthengi usithumelele i-48V 200Ah LiFePO4 ibhetri yerakhi yokuphononongwa kwewaranti. Isikhalazo sakhe: "Ibhetri yafa emva kweenyanga ezintandathu." Xa iinjineli zethu zivula indawo ebiyelweyo, iseli nganye yayilinganisa i-1.8V - ngaphantsi kwe-2.5V yokusika kaxakeka. I-BMS yayicimile. Ibhetri yahlala kwindawo enikwe amandla{10}inyanga ezine kwigaraji yase-Arizona kunye nenkqubo yokubeka iliso isazoba iiwatts ezili-15. Lo mthwalo weparasitic ukhuphe ipakethe ngaphaya komda wokhuseleko, kwaye akukho tshaja eqhelekileyo inokuyivusa. Ibhetri eyi-$3,200 etshatyalaliswe sisixhobo sokubeka iliso se-$15 akukho mntu wacinga ukuba angayiqhawula.
Izilumkiso zokukhutshwa kwebhetri zikhona ukunqanda kanye le meko. Nokuba sisilumkiso sedeshbhodi kwinqwelo-mafutha yakho okanye i-alam ye-BMS ekwisixokelelwano sogcino lwamandla ekhaya, umyalezo uyafana: ibhetri yakho iphulukana nentlawulo ngokukhawuleza kunokuba iyifumene, kwaye ukuba awukwenzi oko, umonakalo uba ngokusisigxina.
Ithetha ukuthini eneneni "Isilumkiso Sokukhupha Ibhetri"?
Isilumkiso sokukhutshwa kwebhetri sibonisa ukuba imeko yebhetri ihlawulwe (SOC) ngesantya esiya kufikelela kumanqanaba asezantsi kakhulu. Isilumkiso asikuxeleli ukuba ibhetri imbi - siyakuxelela ukuba ibhetri ikwimeko enobungozi.
Yintoni eyenza ibe yingozi kuxhomekeke kwikhemistry yebhetri:
Lead-asidi (ibhetri yemoto):Ukukhupha ngaphantsi kwe-50% ye-SOC kubangela i-sulfate - i-lead sulfate crystals ifomu kwiipleyiti kwaye ibe lukhuni ngokuhamba kwexesha. Ibhetri yeasidi ekhutshwe nzulu -ehlala iintsuku ezimbalwa ingaphulukana ne-20-30% yomthamo wayo ngokusisigxina.
I-LiFePO4 (iibhetri zokugcina amandla):Ukukhupha ngaphantsi kwe-BMS cutoff voltage (ngokuqhelekileyo i-2.5V ngeseli nganye, okanye i-40V ye-48V pack) ibangela ukuvalwa kokukhusela. Ukuba ibhetri ihleli kwesi simo, ukuqhubeka kokuzikhupha{4}}kungatyhala iiseli ezingaphantsi kwe-2.0V, nto leyo ebangela ukunyibilika kobhedu kumqokeleli wangoku we-anode - ukusabela kweekhemikhali ezingenakulungiseka okudala iisekethe ezimfutshane zangaphakathi.
Kuzo zombini ezi meko, isilumkiso yifestile yakho yokwenza. Ungayihoyi, kwaye uthenga ibhetri entsha.
Ezona zizathu zi-7 ziqhelekileyo
1. Imithwalo yeParasitic (UMbulali Othuleyo)
Yonke inkqubo yebhetri inamalungu atsala amandla naxa umthwalo ongundoqo ucimile: iisistim zokubek' esweni, i-BMS yokulinda yangoku, izibonisi ze-LED, iimodyuli ze-Wi{0}} ze-Fi, i-inverter yokulinda amandla.
Izibalo zithe ngqo kodwa zihlala zingahoywa:
Ibhetri ye-48V 100Ah LiFePO4 ibamba i-4,800 Wh yamandla asebenzisekayo (kwi-90% DoD=4,320 Wh). Isiguquli selanga kwimowudi yokulinda sitsala ama-20–40W. Kwi-30W ukuzoba rhoqo ngaphandle kwegalelo lelanga:
4,320 Wh ÷ 30W=144 iiyure=6 iintsuku ukukhupha ngokupheleleyo
Iintsuku ezintandathu zemozulu enamafu kunye ne-inverter akukho mntu ucinyiweyo. Yiloo nto kuphela efunekayo.
⚡ Ingcebiso yePro:Phambi kokushiya nayiphi na inkqubo yebhetri ingajongwanga ngaphezu kweeyure ezingama-48 - iholide, ikhabhathi yamaxesha athile, indawo yokwakha - khulula ngokwasemzimbeni ibhetri kuyo yonke imithwalo usebenzisa i-DC breaker okanye qhawula uqhagamshelwano. I-BMS standby current iyodwa (ngokuqhelekileyo i-5–15 mA) inokukhupha ibhetri kwiinyanga ezi-3–6 zogcino.
2. IBhanki yebhetri engaphantsi kobukhulu
Ukuba imithwalo yakho ihlala ikhupha ibhetri ukuya kwi-20% ye-SOC okanye isezantsi ngobusuku ngabunye, ibhetri ayisileli - ingaphantsi. Esi sesona sizathu siqhelekileyo "sokukhutshwa kwesilumkiso" kwiiinkqubo zokuhlala zokugcina amandla.
Usapho olusebenzisa i-30 kWh/ngosuku ludityaniswe nebhetri enye ye-10 kWh ilindele ukuba ibhetri ijikeleze kwi-100% ubunzulu bokukhupha yonke imihla. Nokuba ubomi bomjikelo obubalaseleyo be-LiFePO4, oku kukhawulezisa ukuwohloka ngokumangalisayo.
3. Ukungaphumeleli kweNkqubo yokuTshaja
Ezimotweni:I-alternator engaphumeleliyo okanye iitheminali zebhetri ezidlekileyo zithetha ukuba ibhetri iyaphuma xa uqhuba kuba ayitshaji ngokutsha. Amandla ombane kwiitheminali zebhetri kufuneka afunde 13.8–14.4V xa injini isebenza. Ngaphantsi kwe-13.0V ibonisa ingxaki yenkqubo yokutshaja.
Kwiinkqubo zelanga:I-breaker tripped phakathi kwee-solar panels kunye nomlawuli wentlawulo, i-MPPT tracker engaphumelelanga, okanye i-shading kwiipaneli ezibalulekileyo kunokunciphisa ukutshaja okwangoku ukuya kufuphi ne-zero. Ibhetri yakho iphuma rhoqo ngorhatya kodwa ayiphinde itshaje ngosuku olulandelayo. Ngaphezu kweveki, i-SOC irhabaxa de i-BMS iqale{2}}isilumkiso sombane esisezantsi. Jonga iilog zemihla ngemihla zolawulo lwakho lwelanga - ukuhla ngequbuliso kwe-kWh kuvele amanqaku kwicala lokutshaja, hayi ibhetri.
4. Ubushushu obugqithisileyo
Iqondo lobushushu lelona xabiso liphantsi lokukhupha isantya. Imozulu ebandayo ngaxeshanye inciphisa umthamo okhoyo kwaye inyuse ukuxhathisa kwangaphakathi:
| Ubushushu | Umthamo okhoyo (LiFePO4) | Utshintsho lokuchasa lwangaphakathi |
|---|---|---|
| 25℃(77℃F) | 100% (kaliwe) | Isiseko |
| I-0℃(32℃F) | 80–85% | +30–50% |
| -10℃(14℃F) | 60–70% | +80–120% |
| -20℃(-4℃F) | 40–55% | +150–200% |
Ibhetri elinganiswe kwi-200Ah ihambisa kuphela i-120-140Ah kwi- - idigri ye-10. Ukuba isixokelelwano sakho besilinganiswe ngomthamo olinganisiweyo, ukusebenza kwasebusika kuyakubangela izilumkiso ezisezantsi{7}}ze-SOC nokutshaja kwesola okwaneleyo. Kwizixokelelwano ezibekwe kwindawo ezibandayo,{8}}ukuzifudumeza ubuchwephesha be-BMS kuthintela ukulahleka kwamandla - bona isikhokelo sethuzisebenza njani iinkqubo zokugcina amandla ebhetri.
5. Ukungalingani kweSeli
Kwimininzi-yepakethi yebhetri yeeseli, iiseli zihamba kancinci kancinci kumthamo kunye nombane kumakhulu emijikelo. Ukuba iseli enye kwipakethi ye-16S (48V) ifikelela kwi-2.5V ngelixa enye i-15 iseku-3.1V, i-BMS ibangela ukhuseleko oluphantsi{7}}lombane we-voltage yonke ipakethe - nangona ipakethe ine-70% yomthamo oseleyo.
Ulungiso: i-BMS enolungelelwaniso lweseli olusebenzayo, hayi nje ukungenzi nto. I-Passive balancing isebenza kuphela ngexesha lokutshaja (ukopha okugqithisileyo kwiiseli eziphezulu). Ulungelelwaniso olusebenzayo lusasaza amandla phakathi kweeseli ngexesha lokutshaja kunye nokukhupha, ukugcina ipakethi isebenziseka ixesha elide.
6. Iqondo lokukhupha eliPhakamileyo lokuNgangqinelani
Ukudweba i-200A ngokuqhubekayo ukusuka kwibhetri elinganiselwe kwi-100A ubuninzi bubangela ukukhuselwa kwe-overcurrent - i-BMS inqumle ukukhutshwa ukukhusela ukufudumala kunye nomonakalo weseli. Oku kujongeka "njengesilumkiso sokukhutshwa" kodwa eneneni kukuvalwa kokhuseleko.
Ngaphambi kokuba wenze isayizi yakhoinkqubo yokugcina amandla ebhetri, ubale incopho yomthwalo wakho wangoku:Incopho yangoku=Amandla aphezulu (W) ÷ Amandla ombane ebhetri (V). I-5,000W inverter kwibhanki yebhetri ye-48V idonsa i-104A eqhubekayo. Umlinganiselo wokukhupha ibhetri yakho uphezulu kufuneka ugqithe kunomda.
7. Ukuguga kwebhetri kunye neCapacity Fade
Emva kwe-3,{1}} imijikelo, kunye{2}}nomgangatho ophezulu we-LiFePO4 iibhetri zigcina kuphela i-80% yomthamo wokuqala. Ibhetri ye-200Ah ngoku ikhupha i-160Ah. Ukuba umthwalo wakho awutshintshanga kodwa ixesha lakho lokubaleka liye lehla kancinci kwisithuba seminyaka eyi-2–3, oku kukwaluphala okuqhelekileyo - ayilotyala. Nangona kunjalo, ubudlelwane phakathi kobunzulu bokukhutshwa kunye nobomi bubonke bubonke abunamda:
| Ubunzulu bokukhutshwa | Ubomi obuqikelelweyo boMjikelo (LiFePO4) | UBomi boMsebenzi waMandla |
|---|---|---|
| 100% DoD | ~ 3,000 imijikelo | 3,000 × umthamo ogcweleyo |
| 80% DoD | ~5,000 imijikelo | 4,000 × umthamo opheleleyo |
| 50% DoD | ~8,{1}} imijikelo | 4, 000+ × umthamo opheleleyo |
Ukugcina i-DoD ikwi-80% endaweni ye-100% kwandisa itotali yokugqiba nge-30%. Ukuqonda okuBESS iindleko ubudlelwane- ngokukodwa i-$/cycle/kWh metric - ikunceda wenze izigqibo zobungakanani obukrelekrele kwasekuqaleni.
UBuyiselo oluNgxamisekileyo: Yintoni omawuyenze xa i-BMS Sele Ivaliwe
Ukuba ibhetri yakho ye-LiFePO4 ifunda i-0V kwii-terminals, i-BMS ingene kwimodi yokukhusela enzulu. Iiseli zebhetri zisenokuhlawula, kodwa iiswitshi ze-BMS MOSFET zivuliwe. Nalu ulandelelwano lokubuyisela:
Inyathelo loku-1:Ukulinganisa umbane weseli nganye. Fikelela kwiingcingo zempompo yeseli (okanye sebenzisa i-app yokubek' iliso ye-BMS ukuba isaphendula). Ukuba zonke iiseli zifundeka ngaphezulu kwe-2.5V, ipakethe iyabuyiswa.
Inyathelo lesi-2:Faka i-LiFePO4-itshaja ehambelanayo ne-activation/force-imo yokutshaja. Iitshaja eziqhelekileyo kaninzi azikwazi ukubona ibhetri "efileyo" (i-terminal ye-0V) kwaye aziyi kuqalisa ukutshaja. Imo yokutshaja ngokunyanzeliswa ityhala umsinga omncinci (0.5–1A) ukuvusa i-BMS.
Inyathelo lesi-3:Ukubeka iliso kwiqondo lokushisa kweeseli ngexesha lokubuyisela. Ukuba nayiphi na iseli idlula i-45℃ngexesha lokutshaja kokuqala, yima ngoko nangoko - oku kubonisa umonakalo wangaphakathi.
Inyathelo lesi-4:Nje ukuba i-BMS -ibandakanyeke kwakhona, yenza umjikelo opheleleyo wentlawulo/yokukhupha ukuze uhlengahlengise uqikelelo lwe-SOC. Ikhawuntara ye-BMS coulomb ilahlekelwa kukuchaneka emva kokuvalwa okunzulu.
🚨 Isilumkiso:Ukuba nayiphi na iseli ifundeka ngaphantsi kwe-2.0V, UNGAZAMI ukubuyisela ngaphandle kovavanyo lobungcali. Ngaphantsi kwe-2.0V, ukuchithwa kobhedu kusenokwenzeka ukuba kuqalile. Ukunyanzeliswa kwentlawulo kubhedu{4}}iseli engcolisekileyo yenza i-micro yangaphakathi{5}}iimfutshane ezinokuthi zibangele iziganeko ze-thermal ngexesha lokutshaja okuphezulu{6} kwangoku.
Imibuzo ebuzwa qho
Ndingasivala isilumkiso sokukhupha?
Kwiideshibhodi zemoto, ezinye iimodeli zivumela ukuvala isaziso - kodwa oku kuyingozi. Isilumkiso sikhona kuba ukukhutshwa okuqhubekayo kubulala ibhetri. Kwiinkqubo zogcino lwamandla, i-BMS low{3}i-voltage cutoff yinto-enokungaxoxiswana yokhuseleko. Ungaze uyigqithise.
Kufuneka ndijonge kangaphi imeko yebhetri yam yokutshaja?
Ukugcina amandla elanga: ujongo lwemihla ngemihla usebenzisa i-inverter's monitoring app kwinyanga yokuqala, emva koko ngeveki emva kokuba uqinisekisile ukuba inkqubo ilungelelene. Kwiinkqubo zamaxesha onyaka (iikhabhini, ii-RVs), jonga phambi nasemva kwexesha ngalinye- lokungasetyenziswa.
Ibhetri yam yelanga ibangela{0}}izilumkiso zombane ophantsi rhoqo kusasa. Ngaba ibhetri imbi?
Mhlawumbi hayi - ibhetri yakho inokuba nganeno kumthwalo wakho wasebusuku. Bala ukusebenzisa kwakho ubusuku bonke (kWh) kwaye uyithelekise kumthamo osebenzisekayo webhetri yakho kwi-80% ye-DoD. Ukuba umthwalo udlula umthamo osebenzisekayo, udinga ukugcinwa okungakumbi. Phonononga wethuuluhlu lwemvelisokwiimodyuli ze-LiFePO4 ezilungiselelwe ukuhlala kunye nebhayisekile yorhwebo.
Ngaba ubunzulu bokukhutshwa buchaphazela ukuba kangaphi ndibona izilumkiso?
Ewe. Ukuseta isiguquli esisezantsi se-inverter yakho-i-SOC cutoff ukuya kwi-20% (80% DoD) endaweni ye-10% (90% DoD) ikunika isithinteli esikhulu sokhuseleko kwaye yandisa kakhulu ubomi bebhetri. Umbingelelo omncinci kwisakhono esisebenzisekayo semihla ngemihla uhlawula emva kweminyaka yobomi benkonzo eyongezelelweyo kunye neziganeko ezimbalwa zokukhupha.
Ukunceda ukuyila inkqubo yebhetri ehambelana neprofayile yakho yokwenyani - kwaye inqanda ukukhupha izilumkiso ngokupheleleyo -qhagamshelana neqela lobunjineli bePolinovelukwenzela ukubonisana nobungakanani basimahla.