Ebbugumu erikola kye ki?

Ye ddirisa ly’ebbugumu nga lithium-Ion pack mu butuufu ekkirizibwa okusaanuusa n’okufulumya nga BMS tesudde tantrum oba obutoffaali obusirise okwetta. Ennamba z'olaba ku bakozesa abasinga obungi-Ekitundu kya 18650/21700 datasheets (discharge –20℃to 60℃, charge 0℃to 45℃) si bulimba, naye ze nnamba za "marketing safe". Obulamu obw’amazima buba bwa kimpowooze.

Nkutula amaanyi agazimba agamala-ebipapula ebipakiddwa n’okufumbisa E-Batteries za bike okumanya: Datasheet ye theory, essabo lye nkola.

Ebbugumu ly’okutereka kye kintu obutoffaali bwe buyinza okuwangaala nga tebulina kye bukola ddala. Osobola okulekawo cell ya NMC ennungi ku –40℃okumala omwaka mulamba era ejja kuba ekyali nnungi ng’ogibugumya. Ebbugumu erikola bwe buba nga current ekulukuta. Wano chemistry w’erina okubaawo ddala munda mu jellyroll, ate chemistry ye diva ku bbugumu.

charge wansi wa 0℃era nga osiiga lithium ekyuma ku anode - irreversible, capacity- okutta, ate oluusi n'oluusi okufumita nga dendrites zikula. Okufulumya ku –30 Degree ? Akatoffaali tekajja kufa, kajja kumala ga sulk: voltage sags nga eddalu, internal resistance triples, era ofuna mpozzi 60–70 % ku rated capacity. Mubugumye back up era kizzeemu essanyu. Tewali bulabe bwa nkalakkalira.

99 % of consumer cells: 0℃to 45℃, oluusi 0–60℃singa omukozi aba awulira nga muvumu. Ekintu kyonna ekinyogovu → Lithium plating. Buli BMS esaanira esala chajingi ya current ku ziro wansi wa 0–2℃. Ebimu ku bipapula bya sikulaapu y’Abachina tebikola, era y’ensonga lwaki olaba bangi nnyo nga bafuuwa-okulinnya bbaatule mu ppaaka za Harbin buli luggya.

Waliwo okujjako, ddala:

Certain saft, tadiran, oba custom aerospace cells ne funky electrolytes zisobola okucaajinga ku –20℃, naye osasula ng’oyita mu nnyindo.

LTO (lithium titanate) aseka ku –30℃okucaajinga amangu. Ekibi? Ekitundu ky’amaanyi ga density ate emirundi ebiri ku bbeeyi. Ggwe spec LTO yokka bw'oba ozimba bbaasi za Siberia oba fast-okucaajinga mu Norway.

Ekkomo erya waggulu litera okuba 45℃kubanga waggulu w’ekyo, SEI okukula n’okuvunda kw’amasannyalaze go exponential. charge an NMC811 cell ku 55℃buli lunaku era ojja kugiraba nga ekka okutuuka ku 80 % SOH mu myezi esatu mu kifo ky'emyaka esatu.

Operating Temperature

Obutoffaali obusinga buba bwa specced –20℃okutuuka ku 60℃, some –30℃kati. Cold just makes the cell lazy (IRER IR, voltage eya wansi wansi w'omugugu, obusobozi obutono obukozesebwa). Ebbugumu ligifuula okukaddiwa amangu, naye one-Time 70℃discharge tegenda kugitta mangu - ebitundu by’obuveera biyinza, wadde.

LFP ye kabaka w’ebbugumu. Nze ndabye module za Catl Grid nga zidduka 65℃continuous nga tezimenya ntuuyo. NMC/NCA ku bbugumu eryo? Eby’okwekutula bitandika okukendeera era obeera omubi olunaku lumu okuva ku kufulumya empewo.

Ojja kusanga obutoffaali okwewaana "–40℃okutuuka ku 85℃nga bukola." ziriwo. Military, Oil & Gas, n'abamu ku bakola EV bazigula. Brocuwa ky’etakuba nduulu: 20–30 % amaanyi amatono, 2–4× omuwendo, era emirundi mingi obulamu bwa cycle wansi kubanga electrolyte ejjudde ebirungo ebyewuunyisa. Osasula range, ofiirwa ku buli kimu ekirala. Zikozese nga drone erina okutandika ku –35℃mu Alaska oba nga satellite yo tesobola kwesasulira hhuta.

Teeka bbokisi ya bbaatule enjeru mu musana gwa Texas obutereevu ku 38℃ambient → cell surface hits 65℃easy. Fast-Casch a 300 kW pack mu kyeya → Δt of 25℃mu ddakiika kkumi ne bwe kiba nga kinyogozeddwa amazzi. Leka ddigi ebweru mu –15℃Canadian Winter ekiro → Ebbugumu ery’omusingi liri –13℃ku makya, era nedda, BMS tegenda kukuleka kusiiba-okucaajinga okutuusa nga hhuta ezuukuse.

Tesla, BYD, basically anyone serious, preheats the pack mu kkubo erigenda ku supercharger mu winter ate destes power mu biseera eby’obutiti. Aliexpress yo eya wakati e-Scooter yo? Nkwagaliza emikisa.

Operating Temperature

Kemisitule	Omusango ogwa bulijjo .	Okufulumya amazzi aga bulijjo .	Ebiwandiiko .
NMC / NCA .	0–45 diguli .	–20–60 diguli .	Amaanyi amangi, Omumbejja Omuddusi ow'ebbugumu .
LFP .	0–60 diguli (nga 65) .	–20–65 diguli .	Toasty ate nga terimu bulabe, akyawa amaanyi amangi agannyogoga .
LTO .	–30–55 diguli .	–40–65 diguli .	Asaba wonna, atereka kitundu kya maanyi .
"Ekibiina ky'amagye".	–40–85 diguli .	–40–85 diguli .	exists, alumwa waleti .

Ensonga enkulu: ekkomo ku lupapula lw'amawulire litwale ng'amateeka amakakali ag'okusasuza, ebiragiro ebigonvu eby'okufulumya, n'obulimba obw'enkomeredde ku "kiki ddala ekibaawo mu nsiko."

Kuuma pack yo wakati wa 15–35℃nga bwe kisoboka mu buntu era ejja kukwagala okumala enzirukanya lukumi. Ebirala byonna biba bya kwonooneka.