Dɛn ne depth of discharge?

Depth of discharge (DOD) susuw batere ahoɔden ɔha biara mu nkyem a wɔde adi dwuma bere a wɔde toto ne tumi a wɔde sie nyinaa ho. Sɛ ɛba 100 AH battery a wɔde ahyɛ 80 AH mu a, DOD yɛ 80%.

Saa metric yi nya bere tenten a wo battery no bɛtra hɔ akyɛ ne ahoɔden a wotumi de di dwuma a wowɔ ankasa no so nkɛntɛnso tẽẽ. Abusuabɔ no yɛ tẽẽ nanso ɛho hia: DOD yɛ state of charge (SOC), a ɛkyerɛ bere a biako kɔ soro no, ɔfoforo no so tew.

Abusuabɔ titiriw a ɛda DOD ne batere tumi ntam no .

Battery tumi gyina hɔ ma ahoɔden nyinaa a batere betumi de asie bere a wɔde ahyɛ mu ma, a wɔtaa kyerɛ wɔ ampere-dɔnhwerew (AH) anaa kilowatt-dɔn (kWh) mu. Battery a ne kɛse yɛ kWh 10 no kura kilowatt 10- nnɔnhwerew a ɛyɛ anyinam ahoɔden bere a ɛwɔ 100% charge.

Asɛnnennen no ne sɛ ɛnyɛ bere nyinaa na wubetumi de saa tumi no nyinaa adi dwuma dwoodwoo. Ɛha na DOD bɛyɛ nea ɛho hia. Sɛ nea ɔyɛ no kamfo kyerɛ sɛ fa 80% DOD ma saa 10 kWh battery koro no ara a, ɛsɛ sɛ wugyae 8 kWh pɛ ansa na woasan ayɛ no foforo na woakwati sɛ wobɛsɛe nkwammoaa no.

Akontaabu no yɛ mmerɛw:

DOD (%)=(ahoɔden a wɔayi afi mu / tumi nyinaa) × 100 .

Sɛ wode 6 kWh adi dwuma afi 8 kWh battery mu a, wo DOD yɛ 75%. 2 kWh a aka no gyina hɔ ma wo SoC a ɛyɛ 25%. Saa metrics mmienu yi ka bom yɛ 100% - ɛyɛ adeɛ korɔ no ara susudua a ɛka ho firi adwene a ɛne no bɔ abira mu.

Sɛ wote saa nsonsonoe yi ase a, ɛho hia efisɛ tumi ka nea wowɔ kyerɛ wo, bere a DoD kyerɛ wo sɛnea wubetumi de adi dwuma dwoodwoo a worentwa batere no nkwa nna mu no.

Sɛnea battery chemisries ahorow di dwuma wɔ discharge depth mu .

Battery chemistry na ɛkyerɛ sɛnea wubetumi agyae nsu a emu dɔ a ɛrempira no titiriw. Nsonsonoe no yɛ drama na ɛka adwumayɛ ne sikasɛm nyinaa.

Kɔbere{0}}Acid Battery .

Atetesɛm mu kɔbere-acid batere na ɛwɔ DOD anohyeto a anohyeto wom sen biara. Wɔn a wɔyɛ no dodow no ara kamfo kyerɛ sɛ wɔntra 50% DOD anaa nea ɛba fam sen no ma nkwa nna a eye sen biara. Discharge a ɛboro saa threshold yi so na wode wo ho to asiane mu sɛ sulfation sɛe mprɛte no daa.

A lead-acid battery rated for 200-300 cycles at 50% DOD bɛma cycle kakraa bi koraa sɛ wɔde gu 80% a. Grid corrosion, active material depletion, ne positive plate expansion no kɔ ntɛmntɛm kɛse bere a nsu no mu dɔ no. Temperature Compounds Saa asɛm yi - Battery a ɛyɛ adwuma boro digrii 30 ntɛmntɛm mpo bere a wɔayi afi mu kɛse no.

Lithium-ion batere .

Lithium-ion mfiridwuma no ma DoD a wotumi gyina ano yiye kɛse. Nnɛyi lithium-ion batere taa boa 80-100% DOD, a nhyehyɛe ahorow pii a ɛyɛ papa kyerɛ sɛ wɔde di dwuma wɔ nsu a wɔde gu mu a edi mũ mu.

Mfaso a ɛwɔ so no yɛ nea wotumi bu no dodow. Baabi a lead-acid battery a ɛwɔ 50% a wotumi de di dwuma no hwehwɛ sɛ wɔde tumi a wɔahyɛ no mmɔho abien di ahoɔden ahiade ho dwuma no, lithium-ion battery a ɛwɔ 80-100% DOD de ne tumi a wɔahyɛ no pɛpɛɛpɛ no ma sɛ ahoɔden a wotumi de di dwuma.

Lithium dade phosphate (lifepo4) .

LifePo4 batere gyina hɔ ma mprempren DOD adwumayɛ no atifi. Bere a mfiridwuma mu tumi yɛ 100% DOD no, wɔn a wɔyɛ no dodow no ara kamfo kyerɛ sɛ wɔmfa nsu a wɔde gu mu no to 80-90% so na ama kyinhyia no nkwa nna ayɛ kɛse.

Nsonsonoe a mfaso wɔ so no yɛ kɛse. LifePo4 batere tumi de 5,{ 3}} cycles ma wɔ 80% DOD. Wɔ 100% DOD mu no, battery chemistry koro no ara kɔ fam bɛyɛ 2,000-3,000 cycles. Ɛdenam adwuma a wɔyɛ wɔ 10% DOD so no, kyinhyia nkwa betumi aboro kyinhyia 14,000 - a ɛkyerɛ abusuabɔ a ɛda adi wɔ nsu a ɛkɔ nsu no mu ne nkwa tenten ntam.

Nhwehwɛmu a ɛfa lifepo4 ho ma .Battery a ɛma ahoɔden .Nneɛma a wɔde di dwuma no kyerɛ sɛ saa nkwammoaa yi kura tumi a ɛkɔ so tra hɔ yiye mu wɔ tebea horow a ɛhwehwɛ pii mpo mu. Sɛ DOD yɛ 10-70% a, batere no sɛe brɛoo koraa sen nea wɔde kyinhyia no fi 0-100%, a tumi a wɔde sie no kɔ so yɛ den mpo wɔ 60℃.

Nkɛntɛnso a ɛho hia a DOD nya wɔ kyinhyia asetra so .

Cycle Life - Charge dodow{1}}Discharge cycles Battery betumi akura mu ansa na tumi no akɔ fam wɔ 80% a ɛwɔ mfitiase - mu no wɔ inverse exponential abusuabɔ ne DOD. Nsu a ɛkɔ akyiri no kyerɛ sɛ ɛyɛ kyinhyia nyinaa kakraa bi, nanso abusuabɔ no nyɛ linear.

Nkontaabu a ɛfa ɔsɛe ho .

Battery a ɛsɛe no di nea nhwehwɛmufo frɛ no "tumi a ɛsakra" nnyinasosɛm no akyi. Battery a ɛyɛ cycle a ɛwɔ 100% DOD no betumi ama 300-500 cycles. Saa battery koro no ara a ɛwɔ 50% DOD no betumi anya 1,000-1,500 cycles. Wɔ 20% DOD mu no, kyinhyia dodow no betumi adu 2,000-5,000 a egyina chemistry so.

Ahoɔden a wɔde fa mu nyinaa - kyinhyia a wɔde DoD - abɔ ho no kɔ so yɛ nea ɛkɔ so daa wɔ adwumayɛ kwan a ntease wom mu. Wei kyerɛ sɛ battery a ɛde 500 cycles ma wɔ 100% DOD no ma nkwa nna nyinaa ahoɔden a ɛyɛ ne nyinaa te sɛ deɛ ɛde 2,000 cycles ma wɔ 25% DOD.

Wɔ lithium-ion batere pɔtee ho no, data kyerɛ nkɔso kɛse a ɛba bere a nsu no fã bi pue no. Ebia cobalt-gyina so lithium-ion cell no betumi anya:

300-500 kyinhyia wɔ 100% dod .

1,200-1,500 kyinhyia wɔ 80% dod .

2,000-2,500 kyinhyia wɔ 50% dod .

4,000-6,000 kyinhyia wɔ 25% dod .

15,000+ kyinhyia wɔ 10% dod .

Nea enti a emu dɔ ho hia sen sɛnea wususuw .

Adwennwen a ɛba denam nsu a ɛkɔ akyiri kyinhyia so no nya nneɛma pii a ɛsɛe ade no so nkɛntɛnso bere koro mu. Bere a DOD kɔ soro no, emu ahoɔden kɔ soro, electrode ahorow no fa mfiridwuma mu nhyɛso kɛse mu fi ntrɛwmu ne ntwea so, na nnuru afã a ɛyɛ adwuma no yɛ ntɛmntɛm.

Wɔ NCA (Nickel Cobalt Aluminium) tumi batere nkwammoaa a wɔde di dwuma wɔ anyinam ahoɔden kar mu no, nhwehwɛmu kyerɛ sɛ bere a wɔde fi mu no trɛw no ho hia sen ahye a edi mũ no. Cycling a ɛwɔ 10-70% DOD ntam no ma ɔsɛe a ɛba fam kɛse sen cycling fi 0-100%, ɛwom mpo sɛ abien no nyinaa gyina hɔ ma 60% discharge ranges.

Nea ɛyɛ anigye no, wɔ LFP ne NCM nnuruyɛ ho no, ɛte sɛ nea DOD nkɛntɛnso no nyɛ kɛse bere a wɔde toto ɔhyew ne kyinhyia mpɛn dodow ho no, a ɛkyerɛ sɛ nnɛyi nnuruyɛ yi ma wotumi yɛ nsakrae kɛse wɔ nsu a wɔde gu mu no sohwɛ mu.

DOD sohwɛ ho akwan a mfaso wɔ so .

DOD a wɔbɛhwɛ so yiye no hwehwɛ sɛ wɔyɛ mfiridwuma nhyehyɛe ne adwumayɛ mu nteɛso nyinaa. Botae no ne sɛ wɔbɛkari pɛ wɔ tumi a wobetumi de adi dwuma ne nkwa tenten ne ɛka a wɔbɔ ho.

Battery sohwɛ nhyehyɛe a wɔde ka bom .

Nnɛyi batere nhyehyɛe (BMS) di DOD so denneennen denam nhyehyɛe a ɛyɛ nwonwa so. Saa nhyehyɛe ahorow yi kɔ so hwɛ cell voltage, current, temperature, ne estimated SOC a ɛbɛma wɔasiw so-discharge.

BMS siw ɔsɛe ano denam akwan horow pii so:

Voltage Monitoring kyere nkwammoaa a ɛbɛn voltage thresholds a ɛba fam koraa .

Mprempren nkabom (coulomb counting) di ahoɔden a ɛsen no akyi pɛpɛɛpɛ pɛpɛɛpɛ .

Kalman filters ka voltage ne mprempren data bom ma SOC akontaabu a ɛyɛ pɛpɛɛpɛ .

Cutoff Controls Twa adesoa ahorow mu bere a woadu DOD anohyeto ahorow ho no .

Wɔ power battery applications a ɛwɔ anyinam ahoɔden kar mu no, BMS no taa siw 10-90% SOC (80% DOD) ano de bɔ nkwammoaa ho ban. Saa buffer zone yi hwɛ hu sɛ nkwammoaa no nnya ahoɔden a ɛba fam kɛse a ɛbɛma asɛe a wontumi nsakra no da.

Application-Nsusuiɛ pɔtee bi .

Nsɛm a ɛfa dwumadie ho no hwehwɛ sɛ wɔde DOD akwan ahodoɔ di dwuma:

Owia ahoɔden a wɔkora so:Nhyehyɛeɛ no taa yɛ battery bank kɛseɛ de siw DOD da biara da ano kɔsi 20-30%, a ɛwɔ mmerɛ mu DOD a ɛboro soɔ no yɛ 50-60%. Saa ɔkwan a wɔfa so yɛ ade a ɛyɛ katee yi ma nkwa nna a wɔhwɛ kwan sɛ wobenya afi saa nneɛma a wɔde si hɔ yi mu no yɛ kɛse. Battery bank no yɛ nea wɔahyɛ da ayɛ no kɛse dodo sɛ wɔde toto da biara da ahoɔden ahiade ho a.

Kar a wɔde anyinam ahoɔden yɛ:Nnɛyi EV ahorow no di kari a ɛyɛ mmerɛw ho dwuma. 0-100% a wɔada no adi no taa gyina hɔ ma 10-90% wɔ nkwammoaa tumi ankasa mu. Saa DOD a wotumi de di dwuma 80% yi bɔ battery no ho ban bere a ɛma wonya range a mfaso wɔ so no. Wɔn a wɔyɛ no binom, titiriw wɔn a wɔde LFP nkwammoaa di dwuma no, ma kwan ma wɔde charge a wɔde di dwuma daa no kyerɛ 100% efisɛ chemistry a ɛwɔ ase no yɛ nea wotumi gyina ano kɛse.

Robɔt a wɔde fa nneɛma so ne AGV ahorow:Saa nhyehyɛe ahorow yi de adwumayɛ bere a wɔde yɛ adwuma no di kan. BMS no de wɔn ani asi 20-80% SOC (60% DOD) so ma adwumayɛ a wɔyɛ no daa, a wɔma kwan ma wɔde wɔn ho hyɛ mu kɔ akyiri wɔ asɛmpatrɛw a wɔatrɛw mu nkutoo mu. SOC akyi a wodi no pɛpɛɛpɛ no ma robɔt tumi san kɔ mmeae a wɔde charge no ansa na adu baabi a ɛho hia.

Grid-Kɔ so a wɔde sie:BESS akɛseɛ (battery energy storage systems) taa yɛ adwuma wɔ DOD kwan teateaa mu (30-50%) de ma cycle count yɛ kɛseɛ sene mfeɛ 10-15 adwumayɛ kwan no. Sikasɛm no fa nkwa tenten ho sen tumi a ɛsen biara a woyi fi mu wɔ kyinhyia biara mu.

DoD a eye sen biara a wɔde di dwuma denam dwumadie so .

Nhwehwɛmu ne afuom nsɛm ayɛ akwankyerɛ a mfaso wɔ so:

Ɛlektrɔnik mfiri a wɔde di dwuma:20-80% SOC (60% DOD) ma tumi ne nkwa ntam kari pɛ a mfaso wɔ so no yɛ kɛse .

Kar a wɔde anyinam ahoɔden yɛ:10-90% SOC (80% DOD) ma wonya kwan a ɛfata bere a ɛhwɛ ma batere nkwa nna yɛ 8-10 .

Owia a wɔde sie:20-50% da biara da DoD a ɛtɔ mmere bi a ɛyɛ kyinhyia a emu dɔ ma bere mu nneɛma a wɔkora so .

Nnwumayɛ mu Nneɛma a Wɔde Di Dwuma:30-70% DOD ma dwumadie a ɛhia 5,000+ kyinhyia .

Nneɛma a wɔde boa ntɛm ara:Wɔahwɛ so wɔ 90-100% SOC (Low DOD) mu akosi sɛ ɛho behia, afei wɔayi afi mu sɛnea ɛho hia .

Ɔhyew ne DOD: Nkɛntɛnso a ɛma nneɛma yɛ kɛse .

Ɔhyew no nnya battery adwumayɛ so nkɛntɛnso - kɛkɛ a ɛsakra DOD-kɔ-cycle-asetra abusuabɔ. Ɔhyew a ɛkɔ soro no ma ɔsɛe ntɛmntɛm wɔ DOD biara mu, nanso nkɛntɛnso no yɛ kɛse bere a nsu no fi mu kɔ akyiri no.

Data kyerɛ sɛ lithium-ion battery a wɔde asie wɔ 25℃no hwere tumi ketewaa bi bere a bere kɔ so no. Wɔ 40℃, tumi a wɔhwere no ntɛmntɛm ntɛmntɛm 4-6x. Sɛ wode deep discharge cycles (80-100% DOD) ka ho wɔ ɔhyew a ɛkɔ soro mu a, ɔsɛe betumi ayɛ ntɛmntɛm 10-15x sen cycles a ɛnyɛ fam wɔ ɔhyew a ɛkɔ fam mu.

Eyi nti na ɔhyew sohwɛ nhyehyɛe ahorow a ɛwɔ anyinam ahoɔden kar ahorow mu no yɛ nnam wɔ batere a ɛyɛ nwini mu bere a wɔregye anyinam ahoɔden ntɛmntɛm ne nsɛm a emu yɛ duru a ɛkɔ so no. Botae no nyɛ sɛ ɛbɛhwɛ ɔhyew a ɛba ntɛm so - kɛkɛ sɛ ɛremma cascading degradation a ɛba bere a DOD a ɛkɔ soro ne ɔhyew a ɛkɔ soro no hyia no nsiw.

Wɔ stationary storage applications ho no, battery a wɔhwɛ so wɔ 15-25℃range bere a anohyeto DOD yɛ 50-60% no betumi atrɛw adwumayɛ nkwa mu afi 5,000 cycles akɔ 10,000+ cycles - ɔkwan a etu mpɔn a wɔfa so ma nhyehyɛe no nkwa nna a mfaso wɔ so no yɛ mmɔho abien.

Sikasɛm mu nkyerɛkyerɛmu a ɛwɔ DOD a wɔpaw mu .

Sikasɛm ho akontabuo a atwa DOD ho ahyia no fa ɛka a wɔbɔ ansa na wɔabɔ no ho ne nkwa nna mu boɔ. Battery nhyehyɛe a wɔde 50% DOD di dwuma no bo yɛ nea ɛboro so mmɔho abien sen 100% DOD a ɛbɛma wɔanya tumi koro no ara a wobetumi de adi dwuma. Nanso 50% DOD nhyehyɛe no bɛyɛ sɛ ɛbɛkyɛ 3-4x.

Sikasɛm ho nhwɛso a wɔayɛ no mmerɛw ni:

Nsɛm a ɛwɔ hɔ: .100 kWh rated tumi, 100% DOD ma kwan .

Nneɛma a wotumi de di dwuma: 100 kWh .

kyinhyia asetra: 2,000 kyinhyia .

Nkwa nna nyinaa mu ahoɔden: 200,000 kWh .

Ɛka: $50,000 .

Ka a wɔbɔ wɔ KWH biara ho no yɛ cycle: $0.25 .

Nsɛm a ɛwɔ mu B: .200 kWh rated tumi, 50% DOD anohyeto .

Nneɛma a wotumi de di dwuma: 100 kWh (same) .

kyinhyia asetra: 5,000 kyinhyia .

Nkwa nna nyinaa mu ahoɔden: 500,000 kWh .

Ɛka: $100,000 .

Ka a wɔbɔ wɔ KWH biara ho no yɛ cycle: $0.20 .

50% DOD kwan no bo yɛ mmɔho abien mfiase no nanso ɛde 20% a ɛba fam ma ahoɔden biara wɔ nhyehyɛe no nkwa nna mu. Saa akontaabu yi tu mpɔn kɛse bere a yɛresusuw ɛka a wɔbɔ wɔ nneɛma a wɔde besi ananmu, bere a wɔde yɛ adwuma, ne bere a wɔde siesie nneɛma ho no.

Wɔ aguadi mu dwumadie ho no, payback akontabuo no gyina duty cycle so kɛseɛ. High-frequency cycling (cycle pii da biara) no pene dod anohyeto ahorow a ɛyɛ konservatif so denneennen. Nneɛma a wɔde di dwuma a wɔmfa sakre ntaa nkɔ no betumi agyina nsu a emu dɔ a wɔde ma no ho kwan a sikasɛm mu asotwe kɛse biara nni ho.

Real-Wiase DOD adwumayɛ ho nsɛm .

Field data a efi deployed systems mu no ma validation a ɛho hia wɔ laboratory predimtions mu. Nhwehwɛmu bi a wɔyɛe wɔ anyinam ahoɔden kar batere ho no kyerɛe sɛ karkafo taa gye sika kɔ 100% na wɔde di dwuma a ɛba fam sen 20% (80% + DOD) nyaa tumi a wɔsɛe no ntɛmntɛm 15-20% sen wɔn a wɔhwɛ so 20-80% a wɔde bɔ mfɛnsere (60% DOD).

Solar storage installations kyerɛ sɛ ɛyɛ nhwɛso a ɛte saa ara. Nhyehyɛe ahorow a wɔayɛ ho nhyehyɛe ama 30% da biara da DOD no yɛ 7,500 cycles ansa na ɛredu 80% tumi, bere a wɔn a wɔtaa de sakre kɔ 60% DOD no duu baabi a ɛsɛe ade koro no ara wɔ 4,200 kyinhyia - ɛkame ayɛ sɛ ɛne 2:1 nsusuwii a wɔhyɛɛ ho nkɔm no hyia pɛpɛɛpɛ.

Nea ɛyɛ anigye no, ankasa-world data da no adi sɛ ɛtɔ mmere bi a deep discharges no mfa ɔhaw pii mma sen deep cycling a ɛkɔ akyiri daa. Battery nhyehyɛe a ɛyɛ adwuma wɔ 30% DOD 90% wɔ bere no mu nanso ɛtɔ mmere bi a ɛma 80% DOD kɔ so tra cycle nkwa a ɛbɛn 30% DOD mfiase no. Eyi kyerɛ sɛ batere betumi agyina adwennwen a ɛba bere ne bere mu ano bere tenten a oprehyɛn a wɔyɛ no daa no da so ara yɛ nea ɛyɛ katee no.

DOD optimization akwan a ɛkɔ akyiri .

Battery management strategies a ɛyɛ nwonwa no kɔ akyiri sen static DOD anohyeto ahorow no kɔ dynamic optimization a egyina nneɛma pii so.

Adaptive DOD a wɔde di dwuma .

Nnɛyi BMS a wɔde di dwuma no sesa DOD a wɔma ho kwan a egyina batere mfe ne akwahosan so. Battery foforɔ betumi ama kwan ama 80% DOD, nanso berɛ a state of health (SOH) so tew kɔ 90% no, nhyehyɛeɛ no de anohyetoɔ ma DOD no ara ma ɛyɛ 70% na ama wɔakura cycle nkwa a wɔgye atom mu wɔ adwumayɛ berɛ no nyinaa mu.

Saa adaptive kwan yi maximizes early-life tumi bere a adom di onyin so, trɛw total mfaso nkwa so 20-30% sɛ wɔde toto fixed DOD akwan.

State of charge window a ɛyɛ papa .

Nhwehwɛmu kyerɛ sɛ ɛkame ayɛ sɛ faako a mframa a wɔde gu mu no wɔ no ho hia te sɛ ne tɛtrɛtɛ no ara pɛ. Cycling wɔ mid-range (40-60% SOC, anaa 20% DOD a ɛwɔ 50% charge) no mma adwennwene a ɛsua sen cycling a ɛwɔ extreme, mpo wɔ dod a ɛne no sɛ.

Nhwɛsoɔ:

Cycling 80-100% SOC kosi 0-20% SOC (80% DOD): adwennwen a ɛkɔ soro .

Cycling 90-50% SOC to 10-50% SOC (80% DOD, a ɛwɔ 50%): Adwennwen a ɛba fam .

Eyi ba efisɛ lithium-ion nkwammoaa no nya nhyɛso kɛse wɔ SOC dodow a ɛkorɔn yiye ne nea ɛba fam koraa mu. Sɛ wɔyɛ adwuma wɔ mfinimfini fam a ahotɔ wom no so a, ɛtew mfiridwuma mu nhyɛso a ɛwɔ electrode ahorow so no so na ɛtew afã a wɔmpɛ no so.

Nkɔmhyɛ a ɛkyerɛ sɛ ɛsɛ sɛ wɔyɛ dod ho nhyehyɛe .

Grid-nhyehyɛe a ɛwɔ nkitahodi a ɛwɔ ahwehwɛde nhyehyɛe a wotumi hyɛ ho nkɔm no betumi adi kan asiesie DOD anohyeto ahorow. Sɛ algorithms hyɛ nkɔm sɛ nnafua abiɛsa a ɛtoatoa so a wɔde hwehwɛ nsu a ɛkɔ soro a, nhyehyɛe no betumi asiw DOD ano wɔ nna a atwam no mu de akora kyinhyia nkwa so ama-adwennwen bere a ɛda yɛn anim no.

Mfiri adesua nhwɛso ahorow hwehwɛ abakɔsɛm mu nhwɛso ahorow, wim tebea ho nkɔmhyɛ, ne grid nsɛnkyerɛnne mu de ma aguadi no yɛ papa-a ɛwɔ ahoɔden a wɔde ma ne batere a wɔkora so wɔ ankasa-bere mu.

DOD susudua ne ne sohwɛ .

DOD gyinaesi a ɛyɛ pɛpɛɛpɛ hwehwɛ sɛ SOC akontaabu a ɛyɛ pɛpɛɛpɛ - ankasa yɛ ɔhaw a emu yɛ den. Akwan titiriw abiɛsa na ɛwɔ hɔ:

Voltage-gyina so akontaabu .

Battery voltage ne SOC wɔ abusuabɔ, na ɛma voltage susudua no tumi bu charge level ho akontaa. Nanso, saa abusuabɔ yi nyɛ non{1}}linear ne chemistry-dependent. LifePo4 batere no kura voltage a ɛyɛ tratraa kakra wɔ 10-90% SOC so, na ɛma voltage nkutoo nnɔɔso mma DOD gyinaesi a ɛyɛ pɛpɛɛpɛ wɔ saa chemistry yi mu.

voltage-gyina so akwan no yɛ adwuma yiye wɔ extremes (a ɛyɛ ma yiye anaasɛ ɛda mpan yiye) a voltage sesa kɛse wɔ unit a tumi sesa mu.

Coulomb Kan .

Sɛ wode current flow no bom wɔ bere mu a, ɛma wonya charge a wɔde kɔ baabi foforo no susuw tẽẽ. Sɛ battery bi firi aseɛ wɔ 100% SoC na ɛde 30 AH ma a, wo nim sɛ battery no yɛ 30 AH a ɛfiri full mu.

Asɛnnennen no yɛ mfomso a wɔaboaboa ano. Nsusuwii nketenkete a ɛnyɛ pɛpɛɛpɛ no yɛ biako wɔ kyinhyia mpempem pii mu. Recalibration a ɛba bere ne bere mu denam charge/discharge cycles a edi mũ anaa voltage-gyinaso a egyina so no siw drift ano.

Model-gyina so akontaabu .

Advanced algorithms ka voltage, current, temperature, ne battery models bom de bu SOC dynamically. Kalman filters ne akwan a ɛte saa ara fuse data sources pii, kɔ so refining akontaabu bere a susudua foforo ba.

Saa akwan yi nya ±2-3% pɛpɛɛpɛ wɔ bere ankasa mu adwumayɛ mu, na ɛma wotumi di DOD so pɛpɛɛpɛ mpo wɔ application ahorow a ɛhwehwɛ pii a ɛwɔ adesoa ne ɔhyew a ɛsakra mu.

DOD ho adwene a ɛnteɛ a ɛtaa ba .

Gyidi ahorow pii a atrɛw wɔ DoD ho no nkura mu wɔ nhwehwɛmu ase:

"Lithium batere hia bere ne bere mu nyinaa a ɛma nsu fi mu ba".- atoro. Nea ɛnte sɛ nickel-battery a egyina so no, lithium-ion nkwammoaa nni nkae tumi biara. Full discharge cycles de adwennwen ka ho a mfaso biara nni so. Ebia bere ne bere mu recalibration a fuel gauge no behia cycle a edi mũ, nanso battery no ankasa nhia.

"DoD a ɛkorɔn kyerɛ sɛ ɛsom bo yiye bere nyinaa".- ɛnyɛ nea ɛho hia. Bere a ɛte sɛ nea tumi pii a woyi wɔ kyinhyia biara mu no yɛ adwuma yiye no, nneɛma a wɔsɛe no ntɛmntɛm no taa pow mfaso a ɛwɔ so no. Sikasɛm mu DOD a eye sen biara no gyina mpɛn dodow a wɔde kyinhyia no ba, ɛka a wɔbɔ wɔ nneɛma a wɔde si ananmu, ne adwumayɛ ho ahwehwɛde ahorow so.

"Batere a ɛwɔ chemistry koro no ara mu nyinaa wɔ DOD su koro".- atoro. Nneɛma a wɔyɛ no yiye, nkwammoaa a wɔyɛ, ne electrode a wɔde yɛ nneɛma no ma nsakrae kɛse ba wɔ nnuruyɛ kuw biako mpo mu. Bere nyinaa fa manufacturer specifications kyerɛ sen generic chemistry akwankyerɛ.

"DOD ho hia ma cycle life nko ara".- no nyɛ nokware. Deep discharge ka ahobammɔ, ahoɔden a wɔde di dwuma yiye, tumi a wɔde ma, ne kalenda a wɔde bɔ akwakoraa ne aberewa. Battery a wɔde gu 100% DOD mpɛn pii no betumi ayɛ emu shorts anaasɛ thermal nsɛm a ɛtetew ne ho fi cycle a ɛnyɛ den-kan degradation ho.

Nsɛm a Wɔtaa Bisa .

Nsonsonoe bɛn na ɛwɔ DOD ne SOC ntam?

DOD ne SOC yɛ akontaabu mu nneɛma a wɔde boa. DOD susu tumi dodoɔ a wode adi dwuma (a mpty tank), berɛ a SOC susu dodoɔ a aka (fuel gauge). Wɔn ka bom yɛ 100% bere nyinaa. Battery a ɛwɔ 70% SOC no wɔ DOD a ɛyɛ 30%.

So metumi de me battery no afiri mu dwoodwoo akɔ 100% DOD?

Egyina batere no mu nnuru ne nea ɔyɛe no ho nsɛm so. Nnɛyi LifePo4 batere tumi di DOD 100% ho dwuma, ɛwom sɛ ɛto ano hye ma 80-90% trɛw nkwa nna mu. Ɛnsɛ sɛ kɔbere-acid batere boro 50% DOD da. Lithium-ion nkwammoaa no gu ahorow nanso mpɛn pii no ɛma DoD 80-100% tumi gyina ano. Bere nyinaa hwɛ product datasheet pɔtee no mu.

Ɔkwan bɛn so na DOD ka anyinam ahoɔden a ɛyɛ adwuma wɔ anyinam ahoɔden kar mu?

Electric kar ahorow de BMS nhyehyɛe a ɛyɛ nwonwa di dwuma de hwɛ DOD so wɔ ahobammɔ mu (mpɛn pii no, 10-90% wɔ nkwammoaa ankasa tumi mu). "100%" charge a wɔada no adi no taa gyina hɔ ma bɛyɛ 90% wɔ nokware tumi mu, a ɛbɔ batere no ho ban fi SOC tebea a ɛkorɔn ne nea ɛba fam nyinaa ho. Saa DOD kwan a wɔhwɛ so yi ma wotumi di kyinhyia 1,500-2,000 wɔ kar no nkwa nna mu, a ɛne kar a wɔde kar tu kwan 150,000-300,000 hyia a egyina batere no kɛse ne sɛnea wɔka kar no so.

So DOD ho hia ma batere a ɛwɔ adekoradan mu?

Yiw, nanso ɛsono sɛnea ɛte. Ɛsɛ sɛ wɔhwɛ batere a ɛwɔ akoraeɛ a wɔmfa sakre nkɔ mu no so wɔ 40-60% SOC (DOD a ɛba fam firi maximum charge) na ama kalenda anyini no ayɛ ketewa. Full charge (0% DOD) ne full discharge (100% DOD) nyinaa ma tumi a ɛyera no yɛ ntɛmntɛm bere a wɔde sie no, titiriw wɔ ɔhyew a ɛkɔ soro mu.