Lithium ion battery PACK ndi chinthu chofunikira chomwe chimayesa kuyesa kwamagetsi pambuyo poyang'ana, kupanga magulu, magulu ndi kusonkhanitsa maselo, ndikuwunika ngati mphamvu ndi kusiyana kwa mphamvu ndizoyenerera.
Battery series-parallel monomer ndi kugwirizana pakati pa kuganiziridwa kwapadera mu batri Pack, kukhala ndi mphamvu zabwino zokha, zoyendetsedwa bwino, monga kukana kwamkati, kusasinthasintha kwamadzimadzi kungathe kutheka kusewera ndi kumasula, cpacity ya batri ngati kusasinthasintha koipa kungakhudze kwambiri. magwiridwe antchito onse a batri, ngakhale chifukwa cholipira kapena kutulutsa zomwe zimayambitsa zovuta zobisika.Njira yabwino yophatikizira ndi njira yabwino yosinthira kusasinthika kwa monomer.
Batire ya lithiamu ion imatsekeredwa ndi kutentha kozungulira, kutentha kwambiri kapena kutsika kwambiri kumakhudza mphamvu ya batri.Moyo wozungulira wa batri ukhoza kukhudzidwa ngati batire imagwira ntchito kutentha kwambiri kwa nthawi yayitali.Ngati kutentha kuli kochepa kwambiri, mphamvuyo imakhala yovuta kusewera.Kuthamanga kwa batire kumawonetsa mphamvu ya batire pakuthawira ndikutuluka pakali pano.Ngati kuchuluka kwa kutulutsa kuli kochepa kwambiri, kuthamanga ndi kutulutsa kumakhala pang'onopang'ono, zomwe zimakhudza kuyesa kuyesa.Ngati mlingowo ndi waukulu kwambiri, mphamvuyo idzachepetsedwa chifukwa cha mphamvu ya polarization ndi zotsatira za kutentha kwa batri, choncho m'pofunika kusankha ndalama zoyenera ndi kutulutsa.
1. Kusasinthika kwa kasinthidwe
Kukonzekera kwabwino sikungowonjezera kuchuluka kwa magwiritsidwe a cell, komanso kuwongolera kusasinthika kwa cell, yomwe ndi maziko a kutulutsa bwino komanso kukhazikika kwa batire.Komabe, kuchuluka kwa kuchuluka kwa AC impedance kudzakulitsidwa pakapanda mphamvu ya batri, zomwe zingafooketse magwiridwe antchito komanso kuchuluka kwa batire.Njira yosinthira batri yotengera mawonekedwe a mabatire amaperekedwa.Vector iyi imawonetsa kufanana pakati pa data ya charger ndi discharge voltage ya batire imodzi ndi batire yokhazikika.Kuyandikira kwa piritsi la batire kumapindika wokhazikika, kukwezeka kwake kuli kofanana, ndipo kuyandikira koyezera kolumikizana ndi 1. Njirayi imachokera ku mgwirizano wamagetsi a monomer voteji, kuphatikiza ndi magawo ena kupeza zotsatira zabwino.Chovuta ndi njira iyi ndikupereka vekitala yokhazikika ya batri.Chifukwa cha zovuta zopanga, payenera kukhala kusiyana pakati pa maselo opangidwa mugulu lililonse, ndipo zimakhala zovuta kupeza vekitala yomwe ili yoyenera gulu lililonse.
Kusanthula kwachulukidwe kunagwiritsidwa ntchito kusanthula njira yowunikira kusiyana pakati pa maselo amodzi.Choyamba, mfundo zazikuluzikulu zomwe zimakhudza magwiridwe antchito a batri zidatengedwa ndi masamu, ndiyeno masamu ang'onoang'ono adachitika kuti azindikire kuwunika komanso kufananiza kwa magwiridwe antchito a batri.Kuwunika kwabwino kwa magwiridwe antchito a batri kunasinthidwa kukhala kusanthula kwachulukidwe, ndipo njira yosavuta yogawa bwino magwiridwe antchito a batri idayikidwa patsogolo.Imaperekedwa potengera ma cell kusankha kwa dongosolo lonse lowunika magwiridwe antchito, idzakhala gawo la Delphi la digiri ya grey correlation ndi kuyeza kwa cholinga, batire yamitundu yambiri yamtundu wamtundu wamtundu wakhazikitsidwa, ndikugonjetsa mbali imodzi ya index imodzi monga muyezo, zida. kuwunika magwiridwe antchito a mphamvu yamtundu wa mphamvu ya lithiamu ion batire, Digiri yolumikizana yomwe imapezeka kuchokera pazotsatira zowunikira imapereka maziko odalirika amalingaliro osankhidwa pambuyo pake ndikugawa mabatire.
Makhalidwe ofunikira omwe ali ndi njira yamagulu amagwirizana ndi kuchuluka kwa batri ndi kutulutsa kopindika kuti mukwaniritse ntchitoyo ndi gulu, gawo lake lokhazikitsa konkriti ndikuchotsa gawo lomwe limapindika, choyamba kupanga mawonekedwe a vector, malinga ndi mayendedwe aliwonse pakati pa mtunda. pakati pa vekitala ya seti yazizindikiro, posankha ma aligorivimu oyenerera kuti azindikire kagawidwe ka mapindikidwe, ndiyeno malizitsani batire ya gululo.Njirayi imayang'ana kusiyanasiyana kwa magwiridwe antchito a batri lomwe likugwira ntchito.Pamaziko a izi, magawo ena oyenerera amasankhidwa kuti akwaniritse kasinthidwe ka batri, ndipo batire yokhala ndi magwiridwe antchito osagwirizana imatha kusanjidwa.
2. Njira yolipirira
Njira yoyenera yolipirira imakhala ndi gawo lofunikira pakutha kwa mabatire.Ngati kuya kwa kulipiritsa kuli kochepa, mphamvu yotulutsa imachepa chimodzimodzi.Ngati kuya kwa kulipiritsa kumakhala kotsika kwambiri, zinthu zomwe zimagwira ntchito mu batire zimakhudzidwa ndipo kuwonongeka kosasinthika kudzayambitsa, kuchepetsa mphamvu ndi moyo wa batri.Chifukwa chake, mulingo woyenera wolipiritsa, voteji yam'mwamba yocheperako komanso nthawi zonse voteji cutoff current iyenera kusankhidwa kuti zitsimikizire kuti mphamvu yolipiritsa ikhoza kukwaniritsidwa, ndikukhathamiritsa kuyendetsa bwino komanso chitetezo komanso bata.Pakalipano, batire ya lithiamu ion imagwiritsa ntchito nthawi zonse-panopa - nthawi zonse-voltage charger mode.Mwa kusanthula zotsatira zanthawi zonse-panopa komanso nthawi zonse-voltage charger ya lithiamu iron phosphate system ndi ternary system mabatire pansi pa mafunde osiyanasiyana othamangitsa ndi ma cutoff voltages osiyanasiyana, zitha kuwoneka kuti
1) pamene kulipiritsa cutoff voteji ndi pa nthawi, nawuza panopa chiŵerengero, chiŵerengero cha nthawi zonse-panopa amachepetsa, nthawi yolipiritsa amachepetsa, koma kugwiritsa ntchito mphamvu kumawonjezeka;(2) Kuthamanga kwa magetsi kukakhala pa nthawi yake, ndi kuchepa kwa voteji yodulirapo, kuchuluka kwacharging komwe kumacheperako kumachepa, kuchuluka kwa charger ndi mphamvu zonse zimachepa.Pofuna kuonetsetsa mphamvu ya batire, kulipiritsa odulidwa voteji wa lithiamu chitsulo mankwala batire sayenera kutsika kuposa 3.4V.Kuti muchepetse nthawi yolipiritsa komanso kutaya mphamvu, sankhani nthawi yoyenera yolipirira komanso yodula.
Kugwirizana kwa SOC kwa monoma iliyonse kumatsimikizira kuchuluka kwa batire, ndipo kulipiritsa moyenera kumapereka mwayi wozindikira kufanana kwa nsanja ya SOC yamtundu uliwonse wamtundu wa monomer, womwe ukhoza kupititsa patsogolo kutulutsa komanso kutulutsa bwino (kutulutsa mphamvu / kukonza mphamvu. ).Njira yofananira pakulipiritsa imatanthawuza kufananiza kwa batri ya lithiamu ion yamphamvu pakulipiritsa.Nthawi zambiri imayamba kukhazikika mphamvu ya batire ikafika kapena ikakwera kuposa mphamvu yokhazikitsidwa, ndipo imalepheretsa kulipiritsa pochepetsa kuyitanitsa kwapano.
Malinga ndi maiko osiyanasiyana a ma cell omwe ali mu paketi ya batri, njira yoyendetsera bwino yoyendetsera batire idapangidwa kuti ikwaniritse kuthamangitsidwa mwachangu kwa paketi ya batri ndikuchotsa chikoka cha ma cell osagwirizana pa nthawi yozungulira ya batire paketi mwa kukonza bwino kuyitanitsa. ma cell amtundu uliwonse kudzera mumtundu wowongolera wowongolera wa batire.Mwachindunji, mphamvu yonse ya batri ya lithiamu ion imatha kuwonjezeredwa ku batire payokha posintha ma siginecha, kapena mphamvu ya batire imodzi imatha kusinthidwa kukhala paketi yonse ya batri.Panthawi yolipirira zingwe za batri, gawo losanja limayang'ana mphamvu ya batri iliyonse.Mphamvu yamagetsi ikafika pamtengo wina, gawo lolinganiza limayamba kugwira ntchito.Kuthamanga kwamagetsi mu batri imodzi ndi shunt kuti achepetse voteji, ndipo mphamvu imabwerezedwanso ku basi yoyendetsa kudzera mu module kuti atembenuke, kuti akwaniritse cholinga choyezera.
Anthu ena amayika njira yothetsera kufananiza kwacharge.Lingaliro lofanana la njirayi ndiloti mphamvu zowonjezera zokha zimaperekedwa ku selo limodzi lokhala ndi mphamvu zochepa, zomwe zimalepheretsa kutulutsa mphamvu ya selo limodzi ndi mphamvu zambiri, zomwe zimachepetsa kwambiri topology ya dera lofanana.Ndiye kuti, mitengo yolipiritsa yosiyana imagwiritsidwa ntchito kulipiritsa mabatire amodzi okhala ndi mphamvu zosiyanasiyana kuti akwaniritse bwino.
3. Kutaya ndalama
Mlingo wotulutsa ndiwofunikira kwambiri pamtundu wa batire ya lithiamu ion.Kuthamanga kwakukulu kwa batri ndi kuyesa kwa zinthu zabwino ndi zoipa za electrode ndi electrolyte.Koma lifiyamu chitsulo mankwala, ndi dongosolo khola, mavuto ang'onoang'ono pa mlandu ndi kumaliseche, ndipo ali ndi zikhalidwe zazikulu za kumaliseche panopa, koma zinthu zoipa ndi osauka conductivity wa lithiamu chitsulo phosphate.Kuchulukitsa kwa lithiamu ion mu electrolyte ndi chinthu chofunikira chomwe chimakhudza kuchuluka kwa batire, ndipo kufalikira kwa ayoni mu batire kumagwirizana kwambiri ndi kapangidwe ka batire ndi electrolyte.
Choncho, zosiyanasiyana kukhetsa mitengo kumabweretsa osiyana kukhetsa nthawi ndi kukhetsa voteji nsanja za mabatire, zomwe zimabweretsa kutulutsa mphamvu zosiyanasiyana, makamaka mabatire ofanana.Choncho, mlingo woyenera wa kutulutsa uyenera kusankhidwa.Kuthekera komwe kulipo kwa batri kumachepa ndi kuchuluka kwa kutulutsa kwamagetsi.
Jiang Cuina etc kuphunzira kumaliseche mlingo wa chitsulo mankwala-ion batire monoma akhoza kutulutsa mphamvu, chikoka cha mtundu womwewo wa kugwirizana koyamba bwino monoma batire ali 1 c panopa mlandu 3.8 V, ndiye motero ndi 0,1, 0.2, 0.5, 1, 2, 3 c kuchuluka kwa kutulutsa kwa 2.5 V, lembani mgwirizano pakati pa phokoso lamagetsi ndi kutulutsa mphamvu, Onani Chithunzi 1. Zotsatira zoyesera zimasonyeza kuti mphamvu yotulutsidwa ya 1 ndi 2C ndi 97.8% ndi 96.5 % ya mphamvu yotulutsidwa ya C / 3, ndipo mphamvu yotulutsidwa ndi 97.2% ndi 94.3% ya mphamvu yotulutsidwa ya C / 3, motsatira.Zitha kuwoneka kuti ndi kuwonjezeka kwa kutulutsa kwamakono, mphamvu yotulutsidwa ndi mphamvu yotulutsidwa ya lithiamu ion batire imachepa kwambiri.
Potulutsa mabatire a lithiamu-ion, muyezo wadziko lonse wa 1C umasankhidwa, ndipo kutulutsa kwakukulu komwe kumatulutsidwa nthawi zambiri kumakhala 2 ~ 3C.Mukatulutsa ndi madzi apamwamba, padzakhala kutentha kwakukulu ndi kutaya mphamvu.Chifukwa chake, yang'anani kutentha kwa zingwe za batri munthawi yeniyeni kuti mupewe kuwonongeka kwa batri ndikufupikitsa moyo wa batri.
4. Kutentha
Kutentha kumakhudza kwambiri ntchito ya electrode chuma ndi electrolyte ntchito mu batire.Mphamvu ya batri imakhudzidwa kwambiri ndi kutentha kwakukulu kapena kutsika.
Pa kutentha kochepa, ntchito ya batri imachepetsedwa kwambiri, kukhoza kuyika ndi kumasula lithiamu kumachepa, kukana kwa mkati mwa batri ndi kuwonjezeka kwa magetsi a polarization, mphamvu yeniyeni yomwe ilipo imachepetsedwa, mphamvu yotulutsa batire imachepetsedwa, nsanja yotulutsa ndi yotsika, batire ndi yosavuta kufikira kutulutsa kwamagetsi, komwe kumawonetseredwa ngati mphamvu yopezeka ya batri imachepetsedwa, kugwiritsa ntchito mphamvu kwa batri kumachepa.
Pamene kutentha kumatuluka, ma ion a lithiamu amatuluka ndikuphatikizidwa pakati pa mizati yabwino ndi yoipa imakhala yogwira ntchito, kotero kuti kukana kwa mkati kwa batri kumachepa ndipo nthawi yogwira imakhala yaitali, yomwe imawonjezera kayendedwe ka bande lamagetsi mu dera lakunja ndikupanga mphamvu yowonjezera.Komabe, ngati batire ikugwira ntchito pa kutentha kwakukulu kwa nthawi yayitali, kukhazikika kwa mapangidwe abwino a latisi kumakhala koipitsitsa, chitetezo cha batri chidzachepetsedwa, ndipo moyo wa batri udzafupikitsidwa kwambiri.
Zhe Li et al.adaphunzira mphamvu ya kutentha pa mphamvu yotulutsa mabatire, ndipo adalemba chiŵerengero cha mphamvu yotulutsa mabatire ku mphamvu yotulutsa (1C kutulutsa pa 25 ℃) pa kutentha kosiyana.Kuyika kusintha kwa batri ndi kutentha, titha kupeza: komwe: C ndi mphamvu ya batri;T ndi kutentha;R2 ndiye coefficient yolumikizirana yoyenerera.Zotsatira zoyesera zikuwonetsa kuti mphamvu ya batri imawola mwachangu kutentha pang'ono, koma kumawonjezeka ndi kutentha kwa kutentha.Kuchuluka kwa batire pa -40 ℃ ndi gawo limodzi mwa magawo atatu a mtengo womwewo, pomwe pa 0 ℃ mpaka 60 ℃, mphamvu ya batire imachokera ku 80 peresenti ya mphamvu yodziwika mpaka 100 peresenti.
Kusanthula kumasonyeza kuti mlingo wa kusintha kwa ohmic kukana pa kutentha kochepa ndi kwakukulu kuposa kutentha kwakukulu, zomwe zimasonyeza kuti kutentha kwapansi kumakhudza kwambiri ntchito ya batri, motero kumakhudza batri ikhoza kumasulidwa.Ndi kuwonjezeka kwa kutentha, kukana kwa ohmic ndi kukana kwa polarization kwa kulipiritsa ndi kutulutsa kumachepa.Komabe, pa kutentha kwambiri, mankhwala anachita bwino ndi kukhazikika zinthu batire adzawonongedwa, chifukwa zotheka mbali zochita, zomwe zingakhudze mphamvu ndi kukana mkati batire, chifukwa adzafupikitsidwa mkombero moyo ndipo ngakhale kuchepetsa chitetezo.
Chifukwa chake, kutentha kwambiri komanso kutentha kochepa kumakhudza magwiridwe antchito ndi moyo wautumiki wa batire ya lithiamu iron phosphate.Pogwira ntchito yeniyeni, njira zatsopano monga kayendetsedwe ka kutentha kwa batri ziyenera kutengedwa kuti zitsimikizire kuti batire imagwira ntchito pa kutentha koyenera.Chipinda choyesera kutentha kosalekeza cha 25 ℃ chitha kukhazikitsidwa mu ulalo woyeserera wa batri PACK.
Nthawi yotumiza: Feb-21-2022