Menene Tsufa na Kalanda? {0} Polinovel

Tsufawar kalanda shine asarar ƙarfin da ke faruwa a cikin batir lithium{0} ion akan lokaci, koda ba'a amfani da su. Ba kamar tsarin injina waɗanda kawai ke sawa yayin aiki ba, sunadarai na baturi yana raguwa ta ci gaba ta hanyar halayen lantarki a saman anode.

Wannan lalacewa yana faruwa ko EV ɗin naka yana zaune a gareji, bankin wutar lantarki ya tsaya a cikin aljihun tebur, ko batura masu ajiyar grid sun kasance marasa aiki. Ana tafiyar da tsarin da farko ta abubuwa biyu: zazzabin ajiya da yanayin caji (SOC).

A tsakiyar kalandar tsufa ya ta'allaka ne wani tsari da ke faruwa a nanoscale. Lokacin da baturin lithium - ion ya tsaya, ƙaƙƙarfan Layer na interphase (SEI) akan anode yana ci gaba da girma. Wannan fim ɗin kariya, yawanci kauri na 100-120 nanometer, yana buɗewa yayin zagayowar caji na farko kuma baya daina haɓakawa.

SEI ya ƙunshi yadudduka daban-daban guda biyu. Layer na ciki ya ƙunshi mahadi na inorganic kamar lithium carbonate (Li₂CO₃), lithium fluoride (LiF), da lithium oxide (Li₂O). Layer na waje ya ƙunshi kayan halitta kamar lithium ethylene dicarbonate. Dukansu yadudduka suna amfani da muhimmiyar manufa{3} suna barin lithium ions su wuce yayin da suke toshe electrons, suna hana gajerun kewayawa.

Duk da haka, wannan kariya ta zo da tsada. Yayin da SEI ke girma akan lokaci, yana cinye lithium mai aiki daga tantanin halitta. Kowane ion lithium da aka cinye yana wakiltar ƙarfin da ya ɓace. Binciken da aka yi kwanan nan ta amfani da simintin gyare-gyare ya tabbatar da cewa ci gaban SEI yana biye da hanyoyi masu rikitarwa waɗanda ke haɓaka a ƙarƙashin wasu yanayin ajiya.

Tsarin haɓaka yana biye da abin da masu bincike ke kira dokar dogaro da lokaci{0}. Da farko, faɗuwar iya aiki yana biye da alaƙar layi tare da lokaci. Yayin da SEI ke daɗa kauri, tunnel ɗin lantarki ta cikin Layer ya zama mafi wahala, kuma lalacewa yana canzawa zuwa murabba'i{3}} tushen alakar tare da lokaci. A cikin dogon lokaci - ajiyar lokaci wanda ya wuce shekaru da yawa, yaduwa da tsarin ƙaura sun mamaye, yana haifar da madaidaicin tsarin lalacewa.

Zazzabi yana aiki azaman ƙaramar farko a cikin tsufa kalanda. Wani bincike na 2024 wanda ya kwashe shekaru 13 da sel kasuwanci 232 a cikin nau'ikan tantanin halitta guda takwas ya bayyana yadda tsananin zafin jiki ke shafar rayuwar batir.

A yanayin zafi na ɗaki (20{1}}25 digiri), baturan lithium{9}} na iya riƙe da ƙarfi sama da 90% bayan shekaru 15 na ajiya idan an kiyaye su a mafi kyawun SOC. Ƙara yawan zafin jiki zuwa digiri 40 , kuma iyawar ƙarfin yana ƙara haɓaka da juzu'i na 2{10}} 3x. A digiri na 60 , sel sun isa ma'auni na ƙarshen rayuwa (ikon 80%) a cikin ƙasa da watanni shida.

Dangantakar ta biyo bayan lissafin Arrhenius don yawancin -amma ba duka{1}} sinadarai na baturi ba. Abubuwan da aka gano na baya-bayan nan sun ƙalubalanci aiwatar da wannan doka ta duniya. Wasu nau'ikan tantanin halitta suna nuna dogaron zafin jiki wanda ya bambanta sosai daga hasashen Arrhenius, musamman a matsanancin yanayin zafi ko fiye da tsawon lokaci.

Daban-daban na cathode sunadarai suna amsa daban-daban ga damuwa na thermal. Batirin lithium cobalt oxide (LCO) yana nuna mafi girman zafin jiki, musamman sama da 50% SOC. Nickel -manganese{4}}cobalt (NMC) da nickel{5}}cobalt{6}}aluminum (NCA) sunadarai suna nuna matsakaicin hankali, yayin da lithium iron phosphate (LFP) ke nuna ingantacciyar kwanciyar hankali. Kwayoyin lithium titanate (LTO) sun kasance mafi yawan zafin jiki{8}}

Ga silicon -graphite composite anodes{1}}wanda ke ƙara zama gama gari a cikin manyan batura masu ƙarfi{3} lamarin ya fi tsanani. Wani bincike na Janairu 2025 ya gano cewa batura masu abun ciki na silicon 10% kawai suna samun raguwar ninki 4 a rayuwar kalanda idan aka kwatanta da tsarkakakken graphite anodes. Yanayin amsawa na silicon yana haɓaka haɓakar SEI, tare da abun ciki na oxygen a cikin tsaka-tsakin yana ƙaruwa sau 26 yayin lokutan ajiya a takaice kamar sa'o'i 72.

Calendar Aging

SOC yana gabatar da babban canji na biyu a cikin tsufa na kalanda. Ajiye batura a matakan caji masu girma yana haifar da yuwuwar bambance-bambancen kimiyyar lantarki waɗanda ke haifar da halayen parasitic.

Layin lalata ba layi ba ne a fadin SOC bakan. Binciken da ke bincika matakan SOC daban-daban guda 16 daga 0% zuwa 100% ya bayyana yankunan plateau inda faɗuwar ƙarfin aiki ya kasance iri ɗaya a tsakanin 20-30% SOC. Koyaya, sama da 70% SOC, lalata yana haɓaka da sauri.

A 100% SOC da yanayin zafi mai tsayi, ƙimar fitar da kai{1} yana ƙaruwa sosai. Nazarin watanni 21 na ƙwayoyin NCA ya nuna hasara mai tsanani lokacin da aka adana shi a 100% SOC da 60 digiri. Haɗin yana haifar da cikakkiyar hadari don raguwa cikin sauri.

Abin sha'awa, ƙananan SOC ba shine mafi kyau duka ba. Yayin da raguwa ke raguwa idan aka kwatanta da babban SOC, adana batura kusa da 0% na iya haifar da wasu batutuwa, ciki har da haɓaka juriya na ciki da wahala a sake kunnawa bayan dogon lokaci.

Mafi kyawun wuri don yawancin sinadarai na lithium{0}ion suna zaune tsakanin 40{3}}50% SOC. A wannan matakin, ƙarfin tuƙi na electrochemical don haɓaka SEI yana raguwa yayin da yake riƙe isasshen caji don hana matsaloli masu alaƙa da fitarwa.

Yayin kalanda da tsufa na sake zagayowar duka suna rage ƙarfin baturi, suna aiki ta hanyoyi daban-daban da ma'auni.

Sakamakon tsufa na zagayowar daga injina na saka lithium da cirewa yayin caji da fitarwa. Ƙarfin yana canzawa -har zuwa 280% a cikin ɓangarorin silicon{3}}a zahiri fashe Layer SEI, yana fallasa sabon wuri ga electrolyte kuma yana haifar da sabon samuwar SEI. Wannan tsari yana cinye lithium cikin sauri kuma yana haɓaka faɗuwar iya aiki.

Tsufawar kalanda na faruwa a hankali amma ba tare da ɓata lokaci ba. Ko da a cikin tsayayyen tantanin halitta wanda ke riƙe da wutar lantarki akai-akai, raguwar electrolyte yana ci gaba. Halayen gefe suna ci gaba a ƙananan ƙima, a hankali suna kauri SEI da cinye kayan aikin lithium.

Don yawancin aikace-aikacen abin hawa na lantarki, kalandar tsufa ta mamaye gabaɗayan lalacewa. EVs sun kasance a fakin kusan kashi 96% na lokacin. Ko da tare da amfani na yau da kullun, alithium -batirzai iya fuskantar 300{1}} 500 cikakken zagayowar caji a kowace shekara. Rayuwar sake zagayowar sel na zamani na iya kaiwa 1,200-2,000 cycles, fassara zuwa shekaru 4-6 na amfani mai aiki. A halin yanzu, tsufa kalanda yana ci gaba da aiki don tsawon rayuwar baturi na shekaru 10-15.

Daidaitaccen lokaci{0} yana bayyana ƙalubalen. Idan baturin EV ya yi ta zagayawa sau ɗaya a rana{2}}yawan yawan amfani{3}}zai ɗauki shekaru 3{7}}5 kafin ya ƙare rayuwarsa. Amma agogon rayuwa na kalanda yana farawa a lokacin da aka kera tantanin halitta kuma baya tsayawa. A zahiri, tsufa kalanda yana ƙayyade lokacin da baturin ya kai ƙarshen{8}} na yawancin aikace-aikace.

Hanyoyi na farko guda biyu suna haifar da asarar iya aiki yayin tsufa na kalanda: asarar kayan lithium (LLI) da asarar kayan aiki (LAM).

LLI ya mamaye madaidaicin yanayin zafi (25{3}}40 digiri). Yayin da SEI ke girma, yana kama ions lithium a cikin mahaɗan inert. Waɗannan ions ba za su iya shiga cikin cajin{5}}waɗanda ba za su iya shiga cikin caji ba, yadda ya kamata rage ƙarfin baturi. Tsarin ba zai iya jurewa ba-da zarar lithium ya zama wani ɓangare na SEI, yana ɓacewa ta dindindin zuwa hawan keke na lantarki.

A yanayin zafi mafi girma (sama da digiri 60), LAM ya zama mahimmanci. Abubuwan da ke aiki a cikin duka wayoyin lantarki suna fuskantar canje-canjen tsari. Rushewar ƙarfe na canji daga cathode na iya cutar da anode, ajiye karafa waɗanda ke haɓaka haɓakar SEI. Rushewar tsarin Crystal yana rage ƙarfin lantarki don ɗaukar lithium, yana ƙara rage ƙarfin aiki.

Ma'auni tsakanin waɗannan hanyoyin ya bambanta da yanayin ajiya. Ciwon kai na baya-bayan nan{1} binciken tushen ya nuna cewa a digiri 60, sel suna fuskantar LLI da LAM a lokaci guda, yayin da a digiri 20-40, LLI yana da lissafin sama da 90% na iya aiki.

Don silicon -mai ɗauke da anodes, halayen parasitic suna ƙaruwa yayin ajiya. Babban reactivity na silicon saman yana kaiwa zuwa ci gaba da bazuwar electrolyte. Ma'aunin microcalorimetry na Isothermal yana nuna cewa wucewar silicon yana cikin sauƙin rushewa, koda ba tare da hawan keke ba. Wannan yana haifar da haɓakar sinadarai na nau'ikan lalacewa a cikin electrolyte, yana bayyana azaman haɓakar zafi wanda ke nuna ci gaba da lalacewa.

Ɗaya daga cikin mafi ƙalubale al'amura na tsinkayar tsufa na kalanda shine babban bambanci tsakanin sel, har ma da ƙira iri ɗaya kuma daga masana'anta iri ɗaya.

Binciken na shekaru 13 da aka ambata a baya ya ƙididdige bambance-bambance masu mahimmanci a cikin ƙimar lalacewa tsakanin ƙwayoyin da ake zaton iri ɗaya ne da aka adana a ƙarƙashin yanayi iri ɗaya. Wasu sel sun rasa ƙarfin 15% yayin da wasu sun rasa kashi 8 kawai bayan lokutan ajiya iri ɗaya. Wannan sauye-sauye yana rikitar da hasashen tsufa da sauran kimanta rayuwa mai amfani ga tsarin sarrafa baturi.

Abubuwa da yawa suna ba da gudummawa ga wannan warwatse. Haƙuri na kera, ko da a cikin ƙayyadaddun ƙayyadaddun bayanai, yana haifar da bambance-bambance masu sauƙi a cikin kauri na lantarki, ƙarar electrolyte, da samuwar SEI yayin zagayowar farko. Waɗannan ƙananan bambance-bambancen suna haɓaka cikin lokaci, suna haifar da bambance-bambancen yanayin tsufa.

Abubuwan da ake nufi don haɓaka karatun tsufa yana da mahimmanci. Samfuran da aka haɓaka daga ƙananan samfuran ƙila ba za su iya yin hasashen ainihin aikin duniya daidai ba{1}. Aiki na baya-bayan nan wanda ya haɗa hanyoyin ƙididdiga da koyan injuna ƙoƙarin yin lissafin wannan sauye-sauye, amma rashin tabbas ya kasance mai ma'ana ga hasashen tsufa na kalanda.

Fahimtar hanyoyin tsufa na kalanda yana kaiwa kai tsaye zuwa dabarun ajiya mai amfani.

Don dogon{0} ajiya na lokaci wanda ya wuce watanni da yawa, kula da zafin jiki tsakanin digiri 10-15 . Wannan yana rage jinkirin haɓaka haɓakar haɓakar SEI. Fade iya aiki a 15 digiri na iya zama 4-6 sau a hankali fiye da a dakin da zazzabi, da kuma 10-15 sau a hankali fiye da 35 digiri.

Matsayin caji yayin ajiya yakamata yayi niyya 40{2}}50% SOC. Wannan yana rage ƙarfin tuƙi na electrochemical don halayen parasitic yayin samar da isasshen caji don hana zubar da yawa. Yawancin masana'antun suna jigilar sel a kusan 40% SOC saboda wannan dalili.

Don EVs da aka ajiye na tsawon lokaci, guje wa barin cikakken cajin baturi. Duk da yake dacewa don samun matsakaicin iyaka nan da nan akwai, adanawa a 80-100% SOC yana haɓaka tsufa sosai. Yawancin EVs na zamani sun haɗa da "yanayin ajiya" ko ba da izinin saita iyakar caji musamman saboda wannan dalili.

Guji iyakar zafin jiki a bangarorin biyu. Yayin da zafi yana haɓaka lalacewa, matsanancin sanyi na iya haifar da wasu batutuwa. A ƙasa da digiri 0, haɗarin lithium plating yana ƙaruwa yayin kowane cajin da zai iya faruwa, kuma tasirin wutar lantarki yana faɗuwa. Idan baturi dole ne a adana shi a cikin yanayin sanyi, tabbatar yana cikin matsakaicin SOC kuma ba zai yi caji ba har sai ya dumama.

Yin caji na lokaci-lokaci a cikin dogon lokaci{0} ajiya ya zama dole amma yakamata a rage shi. Fitar da kai{2} a hankali yana rage SOC cikin watanni. Dubawa da daidaita caji kowane watanni 3{5}} yana hana zubar da ruwa sama da{6}} yayin da yake iyakance lalacewa da ke haifar da sake zagayowar.

Calendar tsufa yana siffanta rayuwar batir EV fiye da yadda yawancin masu su ke fahimta. EVs na zamani suna amfani da tsarin sarrafa zafi na zamani musamman don yaƙar wannan lamarin.

Motocin Tesla, alal misali, suna sanyaya batura a rayayye ko da lokacin da aka faka idan yanayin yanayin yanayi ya wuce wasu ƙofa. Wannan yana jan wuta daga baturin kanta, yana ƙirƙirar ciniki{1}}ashe tsakanin hasarar kewayon nan da nan da kuma dogon lokaci{2}. A cikin matsanancin zafi, sarrafa zafin jiki na iya cinye kashi da yawa na ƙarfin baturi a kowane mako.

Garanti na masana'anta suna nuna gaskiyar tsufa na kalanda. Yawancin garantin EV suna ƙayyadaddun nisan mil da iyakokin lokaci{1} yawanci shekaru 8 ko mil 100,000-150,000, duk wanda ya zo na farko. Bangaren lokaci ya yarda cewa kalandar tsufa zai rage batir ba tare da la'akari da amfani ba.

Dabarun caji suna tasiri sosai ga tsufa na kalanda. Cajin gaggawa na DC yana haifar da zafi, na ɗan lokaci yana ɗaga zafin baturi da haɓaka lalacewa yayin da nan da nan bayan caji. Kwatancen shekara 8- tsakanin daidaitaccen cajin AC da yawan caji mai sauri ya nuna 10% ƙarancin iya aiki ga mai sauri{5}}ungiyar da aka caje{6}yawancin wannan bambance-bambancen da ke da alaƙa da tsufan kalanda mai alaƙa da zafin jiki maimakon matsananciyar hawan keke kaɗai.

Don mafi kyawun tsawon rayuwar baturi, cajin zuwa 80% don amfanin yau da kullun kuma cajin zuwa 100% kawai kafin doguwar tafiya. Bayan isa wurin, idan abin hawa zai zauna na kwanaki, rage SOC zuwa 40-60% idan zai yiwu. Wannan aiki mai sauƙi na iya tsawaita rayuwar batir da shekaru 1-2 akan tsawon shekaru 10 na mallakar.

Tsarukan ajiyar makamashi na tsaye suna fuskantar ƙalubalen tsufa na kalanda. Ba kamar EVs waɗanda galibi ke sake zagayowar yau da kullun ba, batir grid na iya zama a babban SOC na tsawan lokaci, suna jiran samar da wutar lantarki ko amsa kololuwar buƙatu.

Tsarin ajiyar makamashi na baturi na iya kashe kashi 90% na lokacin sa sama da 80% SOC, a shirye don fitarwa lokacin da ake buƙata. Wannan yana haifar da matsanancin tsufa na kalanda. Dole ne masu aiki su daidaita buƙatun sabis na grid akan farashin lalata baturi.

Ingantattun dabarun sun haɗa da sarrafa SOC bisa tsarin amfani da ake tsammani. Idan kololuwar buƙatu na faruwa a zahiri, ajiye batura a matsakaicin SOC har zuwa jim kaɗan kafin buƙata, sannan caji zuwa matakin aiki. Wannan yana rage lokacin da ake kashewa a babban SOC.

Sarrafa yanayin zafi yana da matukar mahimmanci ga manya-manyan shigarwa{0}. Tsarin megawatt 1 - yana aiki a digiri 40 maimakon digiri 25 na iya rasa ƙarin $50,000-100,000 a ƙimar ƙarfinsa fiye da tsawon rayuwarsa saboda haɓakar tsufa na kalanda. Tsarin HVAC da ya dace ya zama larura ta tattalin arziki.

Calendar Aging

Hasashen iyawar faɗuwar yana buƙatar ƙirar lissafi waɗanda ke ɗaukar hadaddun tsaka-tsakin abubuwan da ke haifar da lalacewa.

Semi{0}samfuri masu ƙarfi sun mamaye aikin yanzu. Waɗannan suna haɗa fahimtar hanyoyin lalata ta jiki tare da ingantattun sigogi. Daidaitaccen tsarin yana amfani da alaƙar Arrhenius don dogaro da zafin jiki, ƙayyadaddun ƙa'ida ko doka don dogaro da SOC, da dokar iko don dogaron lokaci:

Asarar iya aiki=A × exp(Ea/RT) × f(SOC) × t^

Inda A shine maƙasudin farko{0}, Ea shine kuzarin kunnawa, R shine madaidaicin iskar gas, T shine zafin jiki, f(SOC) yana wakiltar dogaron SOC, t shine lokaci, kuma shine lokacin ƙayyadaddun lokaci yawanci tsakanin 0.5 da 0.75.

Koyaya, saitin bayanan 2024 wanda ya ƙunshi bayanan shekaru 13 na tsufa ya bayyana iyakoki a wannan hanyar. Dokar Arrhenius ta kasa bayyana dogaro da zafin jiki daidai ga wasu nau'ikan tantanin halitta, musamman a matsanancin yanayin zafi. Hakazalika, ƙayyadaddun lokacin dokar wutar lantarki ya bambanta sosai a cikin sinadarai da yanayi, kama daga 0.3 zuwa 1.0 maimakon tarawa a kusa da 0.5 kamar yadda aka saba zato.

ƙwararrun ƙwararrun ƙwararrun ƙwararrun physics{0}tushen samfura sun haɗa da tsarin sinadarai na lantarki a sarari. Waɗannan suna kwaikwayi rami na lantarki ta hanyar SEI, yaduwar lithium, da ɓarnawar motsin motsin lantarki. Duk da yake suna da ƙarfin lissafi, suna ba da mafi kyawun tsinkaya a cikin yanayi dabam-dabam ba tare da ƙwaƙƙwaran ƙwarewa ba.

Hanyoyi na koyo na inji suna nuna alƙawarin aiwatar da sauye-sauye na asali da kuma hadaddun da ba- layikan layi a cikin tsufa kalanda. Cibiyoyin sadarwar jijiyoyi waɗanda aka horar akan manyan bayanan bayanai na iya yin hasashen sauran rayuwa mai amfani tare da ingantacciyar daidaito, kodayake basu da fassarar injiniyoyi na tushen tsarin kimiyyar lissafi-.

Shekaru biyu da suka gabata sun ba da haske mai mahimmanci game da hanyoyin tsufa na kalanda da dabarun ragewa.

Masu bincike a MIT da sauran wurare sun yi amfani da microscope na lantarki na cryogenic don yin hoton SEI a kusa da ƙudurin atomic. Waɗannan hotuna suna bayyana nau'ikan nanostructure daban-daban tare da yankuna daban-daban na crystalline da amorphous. Tsarin yana rinjayar ƙimar jigilar lithium{3} ion da kwanciyar hankali na inji, yana shafar ƙimar tsufa kai tsaye.

Dabarun Operando suna ba da izinin lura da juyin halitta na SEI na hakika yayin ajiya. Tunani tsangwama microscopy ya kama SEI kauri canje-canje a kan sikelin angstroms, bayyana cewa girma faruwa a hankali fashe maimakon ci gaba. Wannan yana nuna cewa fasahohin lokaci-lokaci da hanyoyin gyara suna faruwa ko da lokacin tsufa na kalanda.

Injiniyan lantarki yana nuna alƙawarin rage tsufa na kalanda. Abubuwan da aka ƙara kamar fluoroethylene carbonate (FEC) suna gyara abubuwan SEI, ƙirƙirar ƙarin madaidaicin musaya waɗanda ke tsayayya da ci gaba da haɓaka. Batura masu FEC -mai ƙunshe da electrolytes suna nuna raguwar ƙarfin 20-30% a hankali yayin daɗaɗɗen ajiya idan aka kwatanta da ƙirar asali.

Don silicone anodes, daɗaɗɗen saman da aka yi amfani da su kafin taron salula yana rage tsananin tsufa na kalanda. Ƙananan yadudduka na aluminum oxide ko wasu tukwane suna ba da ingantaccen tushe don samuwar SEI, yana hana saurin halayen parasitic da ke cutar da silicon da ba a rufe ba. Batura masu rufin siliki suna nuna rayuwar kalanda tana gabatowa na graphite{2}}sai dai.

Rarraba waɗannan hanyoyin lalata guda biyu a cikin ainihin aikace-aikacen duniya{0} yana da wahala amma yana da mahimmanci don ingantaccen sarrafa baturi.

Binciken ƙarfin lantarki daban-daban yana ba da hanya ɗaya. Bayanin ƙarfin lantarki yayin zagayowar fitarwa yana canzawa daban don kalanda da tsufa. Tsufawar kalanda da farko yana haifar da asarar lissafin lithium, wanda ke bayyana a matsayin jujjuyawar kwance a cikin lanƙwan ƙarfin lantarki daban-daban. Tsufawar zagayowar yana haifar da asarar kayan lantarki, yana haifar da canje-canje a tsaye. Ta hanyar kwatanta siffofi masu lankwasa akan lokaci, tsarin sarrafa baturi zai iya ƙididdige gudunmawar kowane yanayi.

Ƙimar ƙarfin haɓaka yana ba da fahimta iri ɗaya. Ƙarfin ƙirƙira tare da ƙarfin lantarki yayin fitarwa yana bayyana kololuwa daidai da canjin lokaci a cikin kayan lantarki. Yadda waɗannan kololuwar ke canzawa da raguwa akan lokaci yana nuna ko LLI ko LAM sun mamaye - don haka ko kalanda ko tsufa na sake zagayowar shine na farko.

Don ƙirar ƙira, raba hanyoyin yana da mahimmanci saboda ci gaban su na gaba ya bambanta. Tsufawar kalanda yana biye da ɗan lokaci da ake iya tsinkaya - tushen tsarin idan zafin jiki da SOC sun kasance masu ƙarfi. Tsufawar zagayowar ya dogara da tsarin amfani da zai iya canzawa. Tsarin sarrafa baturi wanda zai iya juyar da lalacewa gabaɗaya zuwa kalanda da abubuwan sake zagayowar zai iya samar da ƙarin ingantattun ƙididdiga masu amfani na rayuwa.

Tsufawar kalanda yana da tasirin tattalin arziki kai tsaye ga fasahar dogaro da baturi{0}.

Ga EVs, baturin yana wakiltar 30{4}}40% na farashin abin hawa. Idan tsufa na kalanda ya rage ƙarfin ƙasa da kashi 80 kafin mai shi ya tara babban nisan mil, ƙimar ƙimar motocin lantarki ta sha wahala. Wannan musamman yana shafar direbobi masu ƙarancin nisan mil a cikin yanayi mai zafi, inda kalandar tsufa ke ci gaba da sauri yayin da hawan keke ya rage kaɗan.

Na biyu{0} aikace-aikacen rayuwa sun dogara da fahimtar tsufa na kalanda. Lokacin da baturin EV ya kai kashi 70 -80% na iya aiki na asali, baya dacewa da amfani da mota amma yana riƙe ƙima mai ƙima don ƙayyadaddun aikace-aikace masu ƙarancin buƙata kamar ma'ajin makamashi na gida ko ƙa'idar mitar grid. Koyaya, tsufa na kalanda yana ci gaba a cikin waɗannan aikace-aikacen rayuwa na biyu{6}. Ingantattun samfuran tsufa suna ƙayyade ko baturin rayuwa na biyu{9} zai samar da ƙarin shekaru 5 ko shekaru 10 na ƙarin sabis-bambancin da ke ƙayyade yuwuwar tattalin arziki.

Farashin garanti na masana'anta sun dogara ne akan hasashen tsufa na kalanda. Rage ƙima da ƙima yana haifar da maye gurbin baturi mai tsada a ƙarƙashin garanti. Yin kima yana haifar da girman baturi mai ra'ayin mazan jiya wanda ke ƙara farashin abin hawa. Binciken na shekaru 13 yana bayyana babban sauye-sauye da karkata daga daidaitattun samfura yana nuna hasashen garanti da yawa na iya buƙatar bita.

Ga ma'aikatan ajiya na grid, kalandar tsufa yana shafar kudaden shiga kai tsaye. Tsarin da ke rasa ƙarfin 20% a cikin shekaru 10 yana haifar da ƙarancin makamashi a kowane zagaye, yana rage samun kudin shiga daga jarin jari ɗaya. Dole ne a ƙirƙira kuɗaɗen ɓarna cikin dabarun siyarwa don sabis na taimako da daidaitawar makamashi.

Yayin da tsufa na kalanda ya kasance ba makawa, bincike mai gudana yana nufin rage tasirinsa ta hanyoyi da yawa.

Nagartattun hanyoyin samar da wutar lantarki suna neman ƙirƙirar SEI mafi tsayayye daga zagayowar farko. Masu bincike suna binciken abubuwan ruwa na ionic, daskararrun electrolytes, da fakitin ƙarar labari waɗanda ke jinkirin haɓakar mu'amala. Wasu na'urorin lantarki na gwaji suna nuna raguwar 50% na yawan tsufa na kalanda idan aka kwatanta da halin yanzu -na{4}}-art.

gyare-gyaren saman lantarki suna ba da wata hanya. Yin amfani da suturar kariya ko ƙirƙirar yadudduka na SEI na wucin gadi kafin taron tantanin halitta na iya kafa tsayayyen musaya waɗanda ke ƙin ci gaba da haɓaka. Wannan hanyar tana nuna alƙawarin musamman don manyan kayan makamashi kamar silicon da ƙarfe na lithium.

Ingantattun dabarun sarrafa baturi suna inganta yanayin ajiya a ainihin aikace-aikacen duniya-. Algorithms masu wayo na iya koyan halayen tsufa na baturi da daidaita yanayin caji, tagogin SOC, da sarrafa zafi don rage lalacewa. Wasu tsare-tsare yanzu suna hasashen ingantattun dabarun daidaitawa don abin hawa{4}}zuwa{5}} aikace-aikacen grid waɗanda ke rage tsufar kalanda da kashi 25% akan hanyoyin da aka saba.

Madaidaitan ka'idojin gwaji suna haɓaka don mafi kyawun yanayin tsufa na kalanda. Gwajin saurin tsufa na al'ada a matsanancin yanayin zafi kuma SOC tana ba da bayanai masu amfani, amma binciken baya-bayan nan yana tambayar ko sakamakon ya yi daidai da yanayin duniya na ainihi{1}. Sabbin ka'idoji sun haɗa yanayin ma'auni mai canzawa da tsawon lokacin gwaji don inganta daidaiton tsinkaya.

Calendar Aging

Batirin EV na zamani yana asarar kusan 2-3% iya aiki a kowace shekara daga kalandar tsufa a ƙarƙashin yanayi na yau da kullun. A cikin yanayi mai zafi ko tare da ayyukan ajiya mara kyau, wannan na iya ƙaruwa zuwa 4-5% kowace shekara. Bayan shekaru 10, tsammanin asarar iya aiki 20-30% koda tare da ƙaramin tuƙi.

A'a, tsufan kalanda ba zai iya dawowa ba. Da zarar an cinye ions lithium a cikin samuwar SEI, ba za a iya dawo da su ba. Koyaya, iyawa wani lokaci na iya bayyana yana ƙaruwa kaɗan bayan ajiya saboda tasirin shakatawa ko canje-canje a saman lantarki, amma wannan ba gaskiya bane koma baya na tsufa na kalanda.

Gabaɗaya, shekarun kalandar kanta baya lalata aminci kai tsaye. Duk da haka, ƙara yawan juriya na ciki daga ci gaban SEI zai iya sa batura su fi dacewa da runaway na thermal idan wasu matsalolin sun faru. Yakamata a kula da tsofaffin batura a hankali yayin caji mai sauri ko manyan ayyuka na ƙarfi{2}.

Tsakanin digiri 10-15 (digiri 50-59 F) yana rage yawan tsufa na kalanda yayin guje wa raguwar aiki da yuwuwar lalacewa daga daskarewa. Wannan kewayon zafin jiki yana rage jinkirin haɓakar motsin motsi na SEI ta hanyar 4-6 idan aka kwatanta da ajiyar zafin jiki.

Batura LFP suna nuna mafi kyawun juriyar tsufa na kalanda fiye da NMC ko NCA, musamman a babban SOC. Kwayoyin LTO suna nuna ƙarancin tsufa na kalanda na gama-gari{1}} ion chemistries. LCO yana nuna mafi munin tsufa na kalanda, musamman a yanayin zafi da SOC sama da 70%.

Ajiye a 40-50% SOC na tsawon lokaci fiye da mako guda. Yayin da cikakken caji yana ba da matsakaicin kewayon kai tsaye, haɓakar kalandar tsufa a babban SOC ya fi wannan dacewa ga motocin da ba za a tuƙi akai-akai ba.

Tsufawar kalanda tana wakiltar ɗayan mahimman abubuwan iyakancewa a fasahar baturi na lithium{0}ion. Rashin makawansa ya samo asali ne daga yanayin ajiyar makamashin lantarki -halayen halayen da ke ba da iko mai ɗaukuwa kuma suna haifar da lalacewa a hankali. Fahimtar hanyoyin, sarrafa yanayin ajiya, da haɓaka ingantattun kayan sun kasance wuraren bincike masu aiki. Yayin da batura ke ƙara zama cibiyar samar da makamashi da tsarin sufuri, rage yawan tsufa na kalanda yana ɗaukar mahimmancin tattalin arziki da muhalli. Batura a cikin EVs na yau na iya wuce motocin da kansu idan ana iya sarrafa yawan tsufa ta kalanda ta hanyar ƙira da dabarun aiki.