Amp Nnɔnhwerew kosi Watt Nnɔnhwerew: Nsakrae Akwankyerɛ a Edi Mu

Yɛhweree cold storage AGV adwuma bi wɔ Q3 afe a etwaam no mu. Client no engineer sii so dua sɛ wɔbɛsan abu Wh ankasa no ho akontaa denam 80% DoD a wɔde bɛka wɔn ankasa temperature derating factor ho. Na yɛafa asɛm aka tẽẽ denam nea ɔyɛe no rated 100Ah mpɛn 12V so, na yewiee bɛyɛ 15% off.

 

Nokwarem no, na misusuw sɛ wɔn akontaabu no yɛ nea wɔde di dwuma wɔ ɔkwan a ɛyɛ katee so dodo saa bere no. Sɛ yɛhwɛ yɛn akyi a, na wɔn ɔhyew nteɛso no yɛ basabasa ampa, nanso na yɛadi nkogu dedaw wɔ bid-akyinnyegye a ɛyɛ papa anaa bɔne no yɛ nea mfaso nni so. Efi saa bere no, yɛhwehwɛ sɛ nsɛm a wɔafa aka nyinaa de derating akontaabu adwuma krataa ka ho, na ɛsɛ sɛ ɛfa mfiridwuma mu ansa na CFO no de ne nsa ahyɛ ase. Adeyɛ no yɛ ɔbrɛ kɛse, nanso anyɛ yiye koraa no yɛrenhwere nkitahodi ahorow wɔ mfomso atitiriw a ɛte saa ho bio.

 

Saa osuahu yi maa mihuu biribi: nnipa dodow no ara bu Ah to Wh nsakrae te sɛ mfinimfini sukuu akontaabu-Wh yɛ pɛ Ah mpɛn V, ayɛ. Nanso obiara a ɔyɛ adetɔ ankasa nim sɛ afiri pii wɔ hɔ a ahintaw wɔ "nsusuwii a ɛnyɛ den" yi akyi.

Momma Yɛmfi Ase Mfi Formula no Ankasa So

Wh=Ah × V, ɛteɛ. 100Ah battery a ɛwɔ 12V nominal ma wo 1200Wh.

Nanso saa 12V no ne nominal voltage no. Wɔ adwumayɛ ankasa mu no, voltage sakra wɔ 10.5V ne 14.4V ntam. Nɔma bɛn na wode di dwuma?

Ɔkwan a ɛyɛ pɛpɛɛpɛ ne sɛ wɔbɛka discharge curve no abom, aboaboa Ah ano a wɔde instantaneous voltage V(t) abɔ ho. Wɔ nsusuwii mu no nea ɛyɛ pɛpɛɛpɛ sen biara, nanso nokwarem no yɛntaa nyɛ eyi wɔ nnwuma ankasa mu-a ɛyɛ den dodo, na ɛnyɛ wɔn a wɔde nneɛma ma pii mpo na wobetumi de discharge curves a edi mũ ama.

Asuadeɛ a ɛfiri Afe a atwam no AGV Dwumadie no mu

San kɔ saa adwuma a ayera no so. Yɛhwehwɛɛ wɔn a wɔde nneɛma ma baasa mu, na sɛnea na ɛte ni:

Sɛ yɛhwɛ $/Wh nkutoo a:

Supplier C te sɛ nea ɔyɛ deal a eye sen biara, ɛnte saa? Nanso yɛantumi antwɛn adapɛn 16-adwuma no a ɛkyɛe no kyerɛ sɛ wɔde akontaabu anum-asotwe bɛma dapɛn biara. Yɛwieeɛ no yɛfaa Supplier B asɛm kaeɛ, na client no de Supplier C data dii dwuma de gyee akyinnyeɛ sɛ yɛn sizing no yɛ mfomsoɔ.

Ɔfã biara anyɛ akontaabu mu mfomso ankasa-nsusuwii ahorow no yɛ soronko. Yɛde nominal voltage ne standard DoD dii dwuma; wɔde mid-point voltage a wɔasusuw a wɔde aggressive derating ka ho dii dwuma. Ɔkwan bɛn so na wogye akyinnye wɔ eyi ho mpo? Wɔ mfiridwuma mu no, wobetumi abu abien no nyinaa bem; wɔ aguadi mu no, obiara a ɔbɛhwere no gye tom.

Nea Enti a Seesei Mede M’adwene Si Nea Enti a Ɛsen Ah So Pii

Ah wɔ ɔhaw kɛse bi sɛ metric: ɛnkyerɛ ahoɔden, charge nko ara.

Sɛ wopɛ batere a ne nyinaa yɛ 100Ah:

Dɛn nti na lead-acid tumi a wotumi de di dwuma no nnu fã? DoD anohyeto yɛ 50%, anyɛ saa a cycle nkwa so tew kɛse. LFP tumi yi gu kɔ 80% anaa mpo 90% bere a ɛkura kyinhyia nkwa mu.

Wɔtaa bu ani gu nsonsonoe yi so wɔ asɛm a wɔafa aka no fã no mu. CFO no hu lead-acid wɔ $180 bere a LFP yɛ $400, na nea edi kan a wɔyɛ no "boro ne bo mmɔho abien." Nanso sɛ wobu ahoɔden a wotumi de di dwuma ankasa ho akontaa a, lead-acid bɛyɛ $0.30/Wh, LFP bɛyɛ $0.38/Wh-nsonsonoe no nyɛ nwonwa saa. Factor wɔ replacement cycles mu, na LFP yɛ nea ne bo yɛ mmerɛw ankasa.

Nokwarem no, eyi gyina sɛnea wɔde di dwuma pɔtee no so. Wɔ single-shift, light-duty scenarios ho no, lead-acid betumi ayɛ sikasɛm mu mfaso ankasa-enhia sɛ wɔpia LFP.

Temperature: A Variable Nnipa Pii Bu no Adesua

Yɛwɔ client bi wɔ Wisconsin a ɔreyɛ cold chain-wɔn adekoradan no te bɛyɛ 40℃F afe-round, ɛkɔ fam ase 20℃F wɔ awɔw bere mu. Na wɔde AGM batere redi dwuma kan, na na ɛsɛ sɛ wɔsesa wɔ asram 14 akyi bere a tumi no kɔɔ fam sen 60% a wɔahyɛ sɛ wɔmfa nni dwuma koraa no.

Bere a wɔadan akɔ LFP akyi no, asram 26 wɔ tebea koro no ara mu na ɛda so ara boro 90% tumi. ROI a ɛwɔ asɛm yi so no hwɛ kɛse, nanso ɛsɛ sɛ meda no adi pefee: eyi yɛ asɛm a eye sen biara-asɛm tebea-nwini nkɔnsɔnkɔnsɔn yɛ LFP beae a ɛyɛ dɛ.

Sɛnea ɔhyew nya tumi so nkɛntɛnso bɛyɛ ni (eyi yɛ yɛn ankasa sɔhwɛ data; adwinnan ahorow bɛsono):

Sɛnea wubetumi ahu no, sɛ ɔhyew so tew a, nsonsonoe a ɛda batere ahorow abien no ntam no trɛw. Wɔ cold storage applications mu no, mfaso a ɛwɔ LFP so no yɛ kɛse.

Nanso hyɛ no nsow-eyi yɛ discharge adwumayɛ. Low-temperature charging ma LFP yɛ afiri foforo. Sɛ wobɔ charge a ɛba fam sen 0℃a, ɛma lithium plating, na BMS nhyehyɛe pii bɛto charge no mu kɛkɛ. Sɛ atɔfoɔ nwiinwii wɔ yei ho, na wɔka sɛ battery no abubu-nokwarem no na ɛyɛ BMS ahobanbɔ afiri no na ɛrekanyan. Sales renka eyi nkyerɛ wo wɔ proactively mu.

Sɛnea Wobu TCO ho akontaa

Mewɔ data a efi po so ahyɛn abien a wɔde toto ho mu. Yɛhwɛɛ nsakraeɛ so sɛdeɛ ɛbɛyɛ yie, nanso nsonsonoeɛ da so ara wɔ adetɔfoɔ dwumadie mu-fa data no sɛ nkyerɛkyerɛmu nko ara.

Saved bɛyɛ $120K, breakeven ntam asram 14 ne 16, gyina sɛnea wubu downtime cost fã.

Fleet B mprempren wɔ asram 38 na ɛda so ara bɛyɛ 87% tumi. Sɛ wogyina saa degradation curve yi so a, ɛnsɛ sɛ mfe 3 foforo yɛ ɔhaw. Fleet A afa batere a wɔde besi ananmu no mu dedaw na ɛreyɛ ahia foforo.

Capacity Sizing Afiri a Ɛwɔ Hɔ

Mahu nnipa pii a wɔtɔ nneɛma a ɛboro batere so ma "ahobammɔ." 100Ah anka ɛbɛdɔɔso nanso wɔtɔ 200Ah. Adwene a ntease wom, nanso saa kwan yi wɔ ɔhaw ahorow wɔ LFP ho.

LFP mpɛ sɛ ɔbɛtra SOC a ɛkorɔn mu bere tenten-bere. Na yɛwɔ client bi a ɔyɛ oversized 40%, a ɔsusuu sɛ ɛyɛ conservative. Mfe abien akyi no, na wɔn ahoɔden a wɔkora so no nye koraa sen batere a ne kɛse te sɛ nea ɛte daa. BMS logs a wɔhwɛɛ no ​​kyerɛɛ sɛ battery no boro 75% SOC so bere nyinaa, ɛntaa mma sɛ ɛbɛkɔ akyiri-.

Nkwammoaa a ɛsensɛn nsu mu wɔ ahoɔden a ɛkorɔn mu bere tenten-bere no ma kalenda nyin ntɛmntɛm ankasa.

Yɛn mprempren sizing nnyinasosɛm: yɛ adwuma kɔ akyi fi 70-80% DoD wɔ tebea a enye koraa-asɛm tebea. 15-20% margin no dɔɔso-nnya adifudepɛ.

Sɛnea wobu akontaa ni (de adwuma ankasa bi bedi dwuma sɛ nhwɛso):

1. Nea edi kan no, kyerɛ ahoɔden a wohia. Ka sɛ mfiri no tu mmirika kɔ so wɔ 500W nnɔnhwerew 6-ɛno yɛ 3000Wh raw ahwehwɛde.
2. Afei fa derating ka ho. Wɔ mu no, yɛde 0.65 factor di dwuma ma adekoradan mu dwumadie, a ɛkata ɔhyew, C-rate, onyin, ne nea ɛkeka ho Sɛ yɛde sie awɔw mu a, yɛde 0.55.3000Wh ÷ 0.65=4615Wh di dwuma
3. Fa adwumayɛ mu mfasoɔ a ɛyɛ 15% ka ho.4615Wh ÷ 0.85=5430Wh
4. Wɔ 12.8V din mu:5430 ÷ 12.8=424Ah.

Enti spec-nyansa, paw 450Ah anaa 500Ah nhyehyɛe.

Saa kwan yi renfata tebea biara, nanso ɛyɛ nea wotumi de ho to so sen sɛ wobɛma ne kɛse ayɛ tẽẽ afi gyinapɛn ahorow a wɔahyɛ no agyirae mu.

Peukert Nkɛntɛnso no

Na menkyerɛw ɔfã yi efisɛ enni nkɛntɛnso ketewaa bi wɔ LFP so, nanso esiane sɛ eyi yɛ akwankyerɛ a edi mũ nti, ɛfata sɛ yɛka ho asɛm.

Lead-acid battery kyerɛ tumi a ɛso tew kɛse wɔ C-rates a ɛkorɔn-wɔfrɛ eyi Peukert effect. AGM battery a ɛyɛ 100Ah a wɔtow gu wɔ 1C (100A) no betumi ama 55-60Ah nkutoo ama. Wɔn a wɔyɛ no datasheet akontaabu gyina C/20 anaa C/10 sɔhwɛ so, na ɛne dwumadie ankasa ntam kwan ware.

LFP Peukert nkyerɛkyerɛmu no bɛyɛ 1.02-1.05, titiriw no, ɛnyɛ hwee. Sɛ́ ebia wobɛtow gu wɔ 0.5C anaa 1C mu no, ɛsono sɛnea wotumi fi mu no ɔha biara mu kakraa bi pɛ.

Enti sɛ wo application no fa high-mprempren bursts-AGV ahoɔhare, forklift lifting, ne nea ɛkeka ho ho a.-lead-acid's rated capacity yɛ reference number kɛkɛ; nea wubenya ankasa no gyina adwuma a wobɛyɛ so. LFP tumi a wɔahyɛ no yɛ nea wotumi de ho to so kakra.

Nea Ɛsɛ sɛ Wohwɛ wɔ Wɔn a Wɔde Nneɛma Ma no nkyɛn

Merenkamfo anaasɛ merenka badmouth suppliers pɔtee biara wɔ ha. Obiara wɔ mfaso ne ɔhaw ahorow, na ebia yɛn application scenarios no mfa wo de no ho.

Nanso nneɛma kakraa bi wɔ hɔ a metumi akyɛ:

• Wɔ wɔn a wɔde batere ma wɔ gua so mprempren fam no, nkwammoaa fi mmeae kakraa bi pɛ. CATL, BYD, GOTION, EVE-saa agofomma a wɔkorɔn yi na wonya gua so kyɛfa dodow no ara. Enti mpɛn pii no ɛnyɛ sɛ wode cell quality toto ho na mmom BMS design ne pack integration tumi.
   
• Sɛ worebisa wɔn a wɔde nneɛma ma no sɛ wɔmma wɔn discharge curves a, anyɛ yiye koraa no bisa abiɛsa: 0.2C, 0.5C, 1C. Adetɔnfo nketewa pii ntumi nyɛ wɔn, anaasɛ wɔmma wo charts a ɛda adi sɛ obi foforo na wɔayɛ ho mfonini. Mpɛn pii no, adetɔnfo akɛse bedi kan abisa wo application pɔtee no ho asɛm, afei wɔde sɔhwɛ data a wɔde wɔn ani asi so bɛma.
   
• Adetɔnfo a wontumi mmua mfiridwuma ho nsɛmmisa wɔ hɔ ara no nkyerɛ pii. Nea ɛho hia ne sɛ ebia wubetumi anya data a wubetumi de adi dwuma wɔ nnɔnhwerew 72 ntam. Frɛmfrɛm kɔkɔɔ ankasa ne radio so kommyɛ bere a wɔabisa akyi, anaasɛ wɔanya nneɛma a wɔde di gua a wɔde di dwuma wɔ ɔkwan a ɛyɛ ne nyinaa so a wɔaboaboa ano.
   
• Kenkan warranty ho nsɛm no yiye. Adetɔnfo pii kyerɛw "mfe 10 anaa 4000 cycles," nanso nkyerɛwee fɛfɛ no wɔ throughput anohyeto ahorow a ebia wɔbɛbɔ wɔ mfe 6. Ebinom kyerɛkyerɛ kyinhyia mu wɔ akwan a ntease nnim so-10% DoD ne 90% DoD bu sɛ kyinhyia koro no ara a ɛma warranty a ɛte saa no yɛ nea mfaso nni so titiriw.
   
• UL 9540A thermal runaway test data-ɛsɛ sɛ LFP adetɔnfoɔ a wɔfata nyinaa nya. Wɔn a wɔtwentwɛn wɔn nan ase na wɔka sɛ "yebetumi ayɛ sɔhwɛ ho nhyehyɛe" no nsɔ nhwɛe anaasɛ wɔasɔ ahwɛ a nea efii mu bae no nyɛ papa.