Cycle life yɛ charge dodow a charge-yi cycles battery bi fa mu ansa na asɛe akɔ tumi level bi a wɔahyɛ ato hɔ. Mpɛn pii no ɛno yɛ 80%, ɛwom sɛ mahu specs nyinaa wɔ beae-70% ma kar ahorow bi, 85% ma afoforo. Threshold no ankasa yɛ ɔkwan a wɔfa so yɛ ade a wɔpɛ na ɛne warranty akontaabu wɔ abusuabɔ kɛse sen battery chemistry agyapade titiriw biara.
Nea enti a batere sɛe .
Ebia SEI layer a ɛwɔ graphite anode so no ne ade a ɛsɛe ade a wɔasua ho ade kɛse wɔ lithium-ion batere mu. Sɛ wodi kan charge cell no a, electrolyte no porɔw wɔ anode no ani na ɛyɛ saa solid film yi-dodow no ara lithium carbonate, lithium fluoride bi sɛ wode Lipf6 nkyene, organic ahorow ahorow redi dwuma a. Ɛsɛ sɛ saa layer yi gyina wɔ cycle kakraa bi akyi. ɛnyɛ saa. Ɛkɔ so nyin, nkakrankakra, di lithium a ɛsɛ sɛ ɛyɛ sakre so de. Meyɛɛ adwuma bi ho adwuma mfe kakraa bi a atwam no bɔɔ mmɔden sɛ mede electrolyte additives bɛma SEI ayɛ den. FEC (fluoroethylene carbonate) boa, VC (Vinylene carbonate) boa pii. Obiara nso ntumi nsiesie no koraa.
Ɔsoro-nickel cathodes mpaapaemu. NMC811, a ɛyɛ 80% nickel, 10% manganese, 10% cobalt, fa volume nsakrae kɛse mu wɔ sakre so-a ɛboro NMC111 anaa NMC523 a akyɛ no so. Nneɛma nketenkete no mu paapae ankasa. Wubetumi ahu no wɔ SEM ase wɔ kyinhyia ɔhaha kakraa bi akyi. Catl susuu bɛyɛ afe 2019 sɛ sɛ wo synthesize single-crystal particles mmom sen sɛ polycrystalline aggregates obiara reyɛ a, wo yi cracking no mu dodow no ara fi hɔ efisɛ aburow hye biara nni hɔ. Nnyigyei a ɛda adi mprempren nanso sɛ wunya synthesis parameters no wɔ scale no mu pɛɛ a, egyee mfe. Mesusu sɛ BYD reyɛ biribi a ɛte saa ara wɔ wɔn blade battery ho nanso wɔnntintim pii mfa wɔn cathode processing ho.
Ɔhyew ho hia sen biribi foforo biara, nokwarem no. Wɔ digrii 10 biara mu no, ɛbɛyɛ sɛ wobɔ onyin mmɔho abien. Eyi nyɛ pɛpɛɛpɛ-Nneɛma ahorow a ɛwɔ hɔ no wɔ ahoɔden ahorow a ɛyɛ adwuma-nanso ɛbɛn sɛnea ɛsɛ ma mfiridwuma ho akontaabu. Pack a ɛyɛ 35℃average no bɛtra hɔ akyɛ asen biako wɔ 45℃. Tesla suaa eyi ntɛm wɔ Roadster no mu. Wɔn kar ahorow a edi akyiri no wɔ ɔhyew sohwɛ a ɛyɛ basabasa yiye, wobetu mmirika ayɛ nwini bere mpo a sɛ wɔde kar no si hɔ sɛ pack no yɛ hyew dodo a.
Awɔw yɛ nwonwa. Degradation chemistry no brɛ ase, na ɛyɛ papa. Nanso wonya resistance a ɛkorɔn kɛse na sɛ wobɔ mmɔden sɛ wobɛbɔ charge ntɛmntɛm dodo a wobɛ mprɛte lithium wɔ anode no so, a ɛyɛ bɔne paa. Lithium deposits no yɛ irnersic capacity loss na sɛ enyin yɛ dendrites a wobɛtumi anya internal short. EV dodow no ara remma wo DC fast charge below 0℃esiane eyi nti.
Nsu a ɛkɔ mu no mu dɔ .
Saa abura no wɔ hɔ-anim nkɛntɛnso wɔ baabi a cycling a ɛnyɛ den trɛw nkwa mu. Sɛ wode batere no tumi 40% pɛ na edi dwuma sen sɛ wode 100% bedi dwuma a, wubetumi abɔ cycle asetra no mmɔho abiɛsa. Ebia nea ɛboro saa. Nneɛma a ɛwɔ hɔ no mu nna hɔ koraa. Ebia nsakrae nketenkete a ɛba wɔ electrode ahorow no mu no boa. Kwati a ɛyɛ extreme electrode potentials a side reactions kɔ ntɛmntɛm no boa ampa. Nanso obiara mmɔɔ ade biara mmoa pɔtee no ho nnadewa ankasa.
EV biara de tumi bi sie wo. Sɛ wo dashboard no ka sɛ 0% a ebia wowɔ 5% SOC ankasa. Sɛ ɛka sɛ 100% wo wɔ 95% anaa ebia 90%. Wɔn a wɔyɛ no ntintim saa nɔma ahorow yi. Me bɔɔ mmɔden sɛ mɛdane-engineer no wɔ me bolt dedaw no so denam BMS data a mɛhwɛ so wɔ can bus so nanso calibration tables no yɛ encrypted.
Bere nhyehyɛe ho nsɛm a wɔsɔ hwɛ .
Obiara mpɛ sɛ ɔtwɛn 3-4 mfe no mu na ama battery nhyehyɛe bi ayɛ nokware. Enti yɛyɛ ntɛm testing-higher temperatures, cycling rates ntɛmntɛm. Ɔhaw no ne sɛ ɛnyɛ nneɛma a ɛsɛe ade nyinaa na ɛyɛ ntɛmntɛm wɔ ɔkwan koro so. Ebi yɛ, ebi nso nyɛ saa. Ɔhyew a ɛkɔ ntɛmntɛm no yɛ adwuma yiye ma nnuru dodow no ara. Rate acceleration yɛ sketchy. Na huammɔdi mode ahorow wɔ hɔ a ɛda adi wɔ kalenda bere a wɔatrɛw mu akyi nkutoo a wuntumi nkɔ ntɛmntɛm koraa.
Nnansa yi ML nkɔmhyɛ nneɛma no yɛ anigye. Wo de cycle data a ɛba ntɛm no kɔ model bi mu na ɛhyɛ nkɔm bere tenten{1}}bere tumi no fade. Stanford tintim adwuma bi wɔ eyi ho wɔ afe 2019 mu, Carnegie Mellon ayɛ nneɛma a ɛte saa ara. Ɛyɛ adwuma yiye ma ɛyɛ nwonwa wɔ nkwammoaa a wɔtetee wɔn no so. Generalization ne ɔhaw no. Sesa cathode composition anaa electrolyte formulation na ɛsɛ sɛ wosan tete ne ho denam data foforo so, a ɛyɛ nea edi atirimpɔw no so nkonim sɛ worebɔ mmɔden sɛ wobɛka nkwa nna a ɛwɔ nhyehyɛe foforo bi mu ho nkɔm a.
Nnuruyɛ ahorow ahorow .
LFP wɔ cycle life a eye sen NMC, period. Wubetumi anya 3000-5000 cycles mmerɛw, ɛtɔ mmere bi a ɛboro saa. Energy density asotwe no yɛ atirimɔdensɛm nanso-Woregyae 30-40% sɛ wode toto high-nickel NMC ho a. Chinafoɔ a wɔyɛ nneɛma no sii gyinaeɛ sɛ saa tradeoff yi yɛ nteaseɛ ma EVs a ne boɔ yɛ mmerɛ a nkurɔfoɔ nhia 300+ mile range. BYD, CATL, obiara a ɔwɔ hɔ no reyɛ LFP ama standard range kar ahorow. Atɔe fam OEM ahorow no yɛ brɛoo sɛ wobegye atom. Amammerɛ mu nsonsonoe anaa gua so nsonsonoe anaa n’abien nyinaa, minnim.
Sodium-ion yɛ nea wɔkyerɛ sɛ ɛwɔ cycle life a ɛte sɛ LFP a egyina nea CATL ne Natron ka so, nanso ɛyɛ nea wɔayɛ wɔ adwumayɛ mu nkutoo te sɛ afe biako enti hena na onim nea ɛba wɔ mfe 5+ akyi wɔ afuw mu.
Solid-STATE kɔ so hyɛ bɔ sɛ ɛbɛtena cycle life a ɛyɛ papa efisɛ liquid electrolyte biara nni hɔ a ɛkyerɛ sɛ interfaces a ɛyɛ den kɛse. Nanso wɔkɔ so yɛ nea wontumi nnya wɔ aguadi mu. Quantumscape ayɛ "mfeɛ mmienu akyi" bɛyɛ mfeɛ nsia seesei. Interface resistance, contact loss wɔ cycling mu, lithium dendrites wɔ designs binom mu-Saa ɔhaw ahorow yi yɛ den sen sɛnea obiara susuwii. Ebia sulfide electrolytes bɛyɛ adwuma yiye sen oxides. Data a efi Japan reba no kyerɛ sɛ ebia.
Kalenda Mpanyinyɛ .
Eyi nya mmu ani gu so kɛse nanso ɛyɛ kɛse ma kar ahorow a ɛnyɛ nea wɔde di dwuma kɛse. Wo batere no brɛ ase a ɛte hɔ ara. Storage temperature ne SOC nyinaa ho hia. Worst case is 100% charge at high temperature-Wobɛhwere ɔha biara mu nkyem pii afe biara a wonyɛ hwee. 40% SOC wɔ dan mu hyew mu no yɛ ade a wɔde sie yiye nanso ɛda adi sɛ ɛnyɛ nea mfaso wɔ so ma kar a wode di dwuma ankasa.
Grid storage yɛ aboa foforo koraa. Wo hia 20+ afe nkwa nna a ɛkyerɛ sɛ 7000+ cycles minimum, ebia 10,000+ sɛ woreyɛ cycles pii da biara da a. Nanso wubetumi agyina ahoɔden a ɛba fam ano na woanya baabi kɛse ama ɔhyew sohwɛ. Sikasɛm mu adwuma no yɛ adwuma soronko-CAPEX ho hia kɛse bere a wode toto OPEX ho bere a woreyɛ amortizing wɔ mfe du du mu no.
Minnim battery ahorow foforo no ho nsɛm pii sɛ mɛka sɛ mfaso wɔ so kɛse. Lithium-Sulfur wɔ cycle life a ɛyɛ hu da so ara esiane polysulfide shuttle no nti, ɛwom sɛ nnwumakuw binom ka sɛ wɔadi ho dwuma de. Lithium-Metal anodes a ɛne electrolytes a ɛyɛ den abɔ mu no betumi ayɛ ɔkwan a ɛkɔ anim nanso dendrite haw no nkɔɔ. Na sɛ mpo nneɛma no yɛ adwuma a, scaling up manufacturing of biribiara foforo gye 5-10 year minimum. Enti nea ɛbɛba akyi biara no, yɛakɔ so ayɛ lithium-ion nsakrae anyɛ yiye koraa no mfe du foforo.
Minnim battery ahorow foforo no ho nsɛm pii sɛ mɛka sɛ mfaso wɔ so kɛse. Lithium-Sulfur wɔ cycle life a ɛyɛ hu da so ara esiane polysulfide shuttle no nti, ɛwom sɛ nnwumakuw binom ka sɛ wɔadi ho dwuma de. Lithium-Metal anodes a ɛne electrolytes a ɛyɛ den abɔ mu no betumi ayɛ ɔkwan a ɛkɔ anim nanso dendrite haw no nkɔɔ. Na sɛ mpo nneɛma no yɛ adwuma a, scaling up manufacturing of biribiara foforo gye 5-10 year minimum. Enti nea ɛbɛba akyi biara no, yɛakɔ so ayɛ lithium-ion nsakrae anyɛ yiye koraa no mfe du foforo.
Lithium polymer batere .Tena baabi wɔ ntam-a ɛyɛ papa sɛ wɔde bɛhyɛ mu a ɛyɛ mmerɛw sen cylindrical cells, cycle life a wode toto standard lithium-ion ho sɛ wo ma ɔhyew no yɛ nea ntease wom a. Decent option ma constrained spaces nanso biribiara nni hɔ a ɛyɛ nsakrae.
