Adwumayɛ su a ɛho hia sen biara no mu biakobatere a wɔde sie ahoɔdenne wɔn discharge adwumayɛ. Sɛnea ɛbɛyɛ na wɔakyerɛ batere no nsu a ɛtwetwe no suban wɔ tebea horow mu no, ɛho hia sɛ wosusuw batere no nsu a ɛtwetwe no curve, a mpɛn pii no ɛyɛ curve a ɛkyerɛ nsakrae a ɛba wɔ discharge voltage mu bere a bere kɔ so no. Nsuo a wɔde gu mu tebea ahodoɔ no, wɔde akwan a wɔfa so yi nsuo gu mu na ɛda adi, na nsuo a wɔde gu mu akwan ahodoɔ bɛma nsuo a wɔde gu mu no akɔ soro. Mpɛn pii no, akwan a wɔfa so de nsu gu no bi ne ɔkwan a wɔfa so yi fi mu, nsu a wɔde gu mu, ahoɔden a wɔde wie, ne ɔhyew a atwa ho ahyia.
Ɔkwan a wɔfa so yi nsu fi mu
Akwan abiɛsa na ɛwɔ hɔ a batere betumi afa so abɔ: mprempren ahoɔden a ɛba bere nyinaa, ahoɔden a ɛko tia bere nyinaa, ne ahoɔden a ɛba bere nyinaa. Wɔakyerɛ discharge curves a wɔtaa yɛ wɔ Mfonini 1-5 mu, a ɛkyerɛ nsakraeɛ a ɛba discharge current, voltage, ne power mu wɔ discharge time mu wɔ discharge modes mmiɛnsa yi ase.
Wɔ daa-resistance discharge mu no, battery no adwumayɛ ahoɔden ne discharge current no so tew nkakrankakra bere kɔ so. Saa ara nso na wɔ constant-current discharge ase no, adwumayɛ ahoɔden nso so tew bere a discharge nhyehyɛe no kɔ so no. Saa adwumayɛ ahoɔden a ɛso tew yi bere a wɔde fi mu no kyɛ no fi battery no mu ahoɔden a ɛkɔ soro no. Bio nso, ɛnam sɛ wɔde batere ahoɔden a wɔde di dwuma kɛse wɔ anyinam ahoɔden nnwinnade, anyinam ahoɔden kar, ne nneɛma afoforo mu nti, ahoɔden a wɔde tow bere nyinaa-renya nkɔanim kɛse. Wɔ daa-tumi a ɛretu no mu no, battery ahoɔden no kɔ so tew bere a ahoɔden a ɛtwetwe no kɔ so kɔ soro bere a ahoɔden no kɔ so no.
Discharge mprempren
Bere a batere no reyɛ adwuma no, wɔfrɛ current a ɛde ba no sɛ discharge current. Wɔtaa frɛ discharge current nso sɛ discharge rate, na wɔtaa de dɔnhwerew biara rate (a wɔsan frɛ no dɔnhwerew biara rate) ne multiplier na ɛkyerɛ.
Discharge rate kyerɛ rate a battery bi de ba, a wɔde susuw bere a ɛtwetwe no mu. Ne titiriw no, ɛyɛ bere a ɛho hia na ama wɔagyae batere no ahoɔden koraa denam discharge current pɔtee bi a wɔtaa da no adi wɔ nnɔnhwerew (h) mu no so. Sɛ nhwɛsoɔ no, wɔ battery a ɛwɔ ahoɔden a wɔahyɛ sɛ ɛyɛ 10 amp-hours (A·h) ho no, sɛ wɔde current a ɛyɛ 2A na ɛyɛ adwuma a, nea ɛne no hyia no yɛ nnɔnhwerew 5 (10A·h/2A=5h), a ɛkyerɛ sɛ battery no rebɔ wɔ nnɔnhwerew 5 mu.
Discharge rate kyerɛ mprempren bo, a wɔda no adi sɛ battery no ahoɔden a wɔahyɛ no mmɔho abien, bere a battery no ahoɔden nyinaa gyae koraa wɔ bere pɔtee bi mu. Sɛ nhwɛsoɔ no, 2C discharge kyerɛ sɛ discharge current no yɛ battery no rated capacity mmɔho mmienu, mpɛn pii no wɔde 2C gyina hɔ ma (beae a C gyina hɔ ma battery no rated capacity). Wɔ battery a ɛwɔ rated capacity 10A·h, 2C discharge (dimensional asɛm bi wɔ ha, kyerɛ sɛ, units of capacity ne current nyɛ pɛ, nanso eyi yɛ ade a wɔtaa de di dwuma, enti wɔrensesa) kyerɛ sɛ discharge current yɛ 2 x 10=20 (A), a ɛne discharge rate a ɛyɛ 0.5h hyia. Batere ahodoɔ ne ne nhyehyɛɛ wɔ ahodoɔ a ɛtumi sesa wɔ tebea a ɛma nsuo gu mu: ebinom fata kɛseɛ ma nsuo a ɛba fam-nsuo, berɛ a ebinom nso yɛ adwuma yie wɔ ahoɔden a ɛkɔ soro mu. Mpɛn pii no, wɔfrɛ nsu a wɔtow gu a ennu 0.5C anaasɛ ɛne no yɛ pɛ no sɛ nea ɛba fam; wɔfrɛ wɔn a ɛwɔ 0.5C ne 3.5C ntam no sɛ medium rates; wɔfrɛ wɔn a ɛwɔ 3.5C ne 7C ntam no sɛ dodow a ɛkɔ soro; na wɔfrɛ wɔn a ɛboro 7C no ultra-high rates.
Termination voltage a ɛyɛ den
Bere a battery rebɔ no, wɔkyerɛkyerɛ mfiase ahoɔden bo no mu sɛ ahoɔden a wɔde fi ase a wɔde yɛ adwuma; sɛ ahoɔden no kɔ fam kodu aboboano a nsuo a ɛbɛfiri mu bio no mfata bio a, wɔfrɛ saa ahoɔden beaeɛ yi sɛ ahoɔden a ɛtwa mu. Mpɛn pii no, ɔsɔhwɛfo no na ɔde saa termination voltage yi bo pɔtee no si hɔ a egyina sɔhwɛ ahwehwɛde ankasa ne osuahu a atwam so.
Set termination voltage no gu ahorow gyina discharge tebea ahorow ne nkɛntɛnso a enya wɔ battery tumi ne nkwa nna so. Wɔtaa de termination voltages a ɛba fam di dwuma wɔ low-temperature tebea horow mu anaasɛ wɔ high-current discharge tebea mu, bere a wɔtaa de termination voltages a ɛkorɔn si low-current discharge tebea mu. Eyi te saa efisɛ polarization a ɛda battery electrode ahorow ntam no kɔ soro kɛse wɔ bere a ɔhyew a ɛba fam- anaasɛ mprempren nsu a ɛkɔ soro-no, na ɛde nneɛma a ɛyɛ adwuma a wɔmfa nni dwuma yiye na ɛma ahoɔden a ɛkɔ fam ntɛmntɛm ba. Enti, sɛ wɔtew termination voltage no so sɛnea ɛfata a, ɛboa ma ahoɔden pii fi mu. Nea ɛne no bɔ abira no, sɛ wode low-current discharge redi dwuma a, wɔde nneɛma a ɛyɛ adwuma wɔ battery no mu no di dwuma yiye. Wɔ eyi mu no, sɛ wɔma termination voltage no kɔ soro de siw deep discharge ano a, ebetumi atrɛw battery no nkwa nna nyinaa mu yiye.
Ɔhyew a atwa yɛn ho ahyia
Sɛnea wɔakyerɛ wɔ Mfonini 1-6 mu no, ɔhyew a atwa yɛn ho ahyia no nya nkɛntɛnso kɛse wɔ nsu a ɛtwetwe no so. Wɔ ɔhyew a ɛkɔ soro mu no, nsu a ɛtwetwe no da su a ɛyɛ brɛoo adi; nanso bere a ɔhyew no so tew no, nsakrae yi mu yɛ den kɛse. Nea enti titiriw ne sɛ, wɔ ɔhyew a ɛba fam mu no, ions a ɛkɔ baabi foforo no so tew, na ɛma ohmic mu ahoɔden a ɛko tia no kɔ soro. Wɔ tebea horow a emu yɛ den mu no, sɛ ɔhyew no sua dodo a, electrolyte no betumi ayɛ nwini, na ɛnam so asiw batere no a ɛbɛbɔ sɛnea ɛte daa no kwan. Bio nso, wɔ ɔhyew a ɛba fam mu no, electrochemical polarization ne concentration polarization no nya nkɔso sɛnea ɛne no hyia, na ɛma discharge curve no porɔw ntɛmntɛm bio.
Mfonini 1-6 Discharge curves a ɛwɔ lead-acid battery mu wɔ ɔhyew soronko mu
Tumi ne tumi pɔtee bi
Batere ahoɔden kyerɛ anyinam ahoɔden dodow a wobetumi anya afi batere mu wɔ tebea horow bi a ɛma anyinam ahoɔden mu. Wɔtaa da unit no adi sɛ ampere-dɔnhwerew (Ah). Ɛdenam tebea ankasa so no, wobetumi akyekyɛ batere ahoɔden mu bio ayɛ no nsusuwii mu tumi, tumi ankasa, ne tumi a wɔahyɛ ho akontaa.
Theoretical capacity (Co) kyerɛ anyinam ahoɔden dodow a wobetumi de ama wɔ tebea horow a eye mu bere a ade a ɛyɛ adwuma no de ne ho hyɛ batere no electrochemical reaction mu koraa. Wɔgyina nneɛma a ɛyɛ adwuma no dodoɔ so na ɛbu saa boɔ yi, wɔ Faraday mmara no akyi. Faraday mmara no ka sɛ abusuabɔ a ɛne ne ho hyia tẽẽ wɔ ade a ɛde ne ho hyɛ adeyɛ no mu wɔ electrode no so no kɛse ne ahoɔden dodow a ɛde kɔ baabi foforo no ntam; sɛ ade a ɛyɛ adwuma mol 1 de ne ho hyɛ batere no mu anyinam ahoɔden mu a, ebetumi ama ahoɔden a ɛne 26.8 A·h anaa 1 farad (F) yɛ pɛ no afi hɔ. Enti, akontaabu nhyehyɛe a edidi so yi wɔ hɔ:
Wɔ fomula no mu no, m yɛ ade a ɛyɛ adwuma no kɛse bere a ɛyɛ adwuma koraa no; n yɛ ɛlɛtrɔnik dodow a wonya anaa ɛyera wɔ nsu a ɛsen no mu; na M yɛ ade a ɛyɛ adwuma no molar mass.
Wɔ fomula no mu no, wɔfrɛ K sɛ electrochemical equivalent a ɛne ade a ɛyɛ adwuma no yɛ pɛ.
Sɛnea wɔakyerɛ wɔ nsɛsoɔ (1.5) mu no, tumi a ɛwɔ nsusuiɛ mu a ɛwɔ anyinam ahoɔden mu no ne adeɛ a ɛyɛ adwuma no dodoɔ ne anyinam ahoɔden a ɛne no sɛ no wɔ abusuabɔ. Sɛ wɔde nneɛma a ɛyɛ adwuma dodow koro no ara di dwuma a, dodow a electrochemical equivalent no sua no, dodow no ara na nsusuwii mu tumi no yɛ kɛse. Electrochemical nneɛma bi a ɛne electrode yɛ pɛ no wɔakyerɛ wɔ Table 1-3.
Table 1-3 Electrochemical Equivalents a Ɛwɔ Electrode Nneɛma Bi Mu
| Negative Electrode Nneɛma a Wɔde Yɛ Adwuma | Nneɛma a ɛyɛ den (g/cm3) . | Tumi Pɔtee (mA·h/g) . | Positive Electrode Nneɛma a Wɔde Yɛ Adwuma | Nneɛma a ɛyɛ den (g/cm3) . | Tumi Pɔtee (mA·h/g) . |
|---|---|---|---|---|---|
| H₂ | - | 0.037 | O₂ | - | 0.30 |
| Li | 0.534 | 0.259 | SOCl2 | 1.63 | 2.22 |
| Mg | 0.74 | 0.454 | Atwam | 7.4 | 2.31 |
| Al | 2.699 | 0.335 | SO2 | 1.37 | 2.38 |
| Fe | 7.85 | 1.04 | MnO2 | 5.0 | 3.24 |
| Zn | 7.1 | 1.22 | NiOOH | 7.4 | 3.42 |
| Cd | 8.65 | 2.10 | Ag2O | 7.1 | 4.33 |
| (Li)Cl2 na ɛwɔ hɔ | 2.25 | 2.68 | PbO2 | 9.3 | 4.45 |
| Pb | 11.34 | 3.87 | I₂ | 4.94 | 4.73 |
Bio nso, wɔtaa de nsusuwii ahorow a ɛfa tumi ankasa ne tumi a wɔahyɛ ho nyansa ho di dwuma. Tumi ankasa kyerɛ anyinam ahoɔden dodow a batere betumi de ama wɔ tebea pɔtee bi mu. Ɛnyɛ nsusuwii mu bo a ɛsen biara nko na ɛto tumi ankasa ano hye na mmom tebea pɔtee a ɛma nsu fi mu no nso.
Nanso, tumi a wɔahyɛ da ayɛ no yɛ gyinapɛn a wɔde asi hɔ ama batere no bere a wɔreyɛ ne bere a wɔreyɛ no; kyerɛ sɛ, ahoɔden a ɛba fam koraa a ɛsɛ sɛ batere no nya wɔ tebea horow a wɔakyerɛ sɛ ɛde nsu gu mu, a wɔsan frɛ no tumi a wɔfrɛ no nominal capacity.
Sɛ wɔde batere ahorow a ɛwɔ ntoatoaso koro no ara mu toto ho a, wɔtaa de tumi pɔtee bi di dwuma de yɛ nhwehwɛmu. Titiriw no, tumi pɔtee kyerɛ anyinam ahoɔden dodow a batere betumi de ama wɔ unit mass anaa volume biara mu, kyerɛ sɛ, mass specific capacity (Ah/kg) ne volumetric specific capacity (Ah/L). Ɛho hia sɛ yɛhyɛ no nsow sɛ sɛ wɔrebu batere mu duru ne ne kɛse ho akontaa a, wɔ electrode nneɛma ne electrolyte a wosusuw ho akyi no, ɛsɛ sɛ wosusuw batere no afã afoforo nso ho, te sɛ nea ɛwɔ batere no mu, nea ɛpaapae mu, ne nneɛma a ɛfa ho a ɛma nsu fa mu. Titiriw wɔ batere a wɔde sie ne pɛtro nkwammoaa ho no, ne dodow ne ne dodow nyinaa nso ka nnwinnade a ɛboa a ɛho hia nyinaa ho, te sɛ tank a wɔde sie nsu, mfiri a wɔde yɛ adwuma (ma batere a wɔde sie), anaasɛ nneɛma a ɛyɛ adwuma a wɔde sie ne nea wɔde ma, nhyehyɛe a wɔde di dwuma, ɔhyew afiri, ne nea ɛkeka ho (ma pɛtro nkwammoaa).
Ɛdenam adwene a ɛfa tumi pɔtee bi ho a yɛde bɛba so no, yebetumi de batere ahorow a ɛsono ne kɛse yɛ adwuma atoto ho. Wɔakyekyɛ batere ahoɔden mu ayɛ no nsusuwii tumi ne tumi ankasa; sɛnea ɛne no hyia no, tumi pɔtee nso wɔ nsusuwii ne ankasa afã horow.
Ahoɔden ne ahoɔden pɔtee bi
Battery ahoɔden kyerɛ anyinam ahoɔden ahoɔden a battery no de ba nyinaa bere a ɛreyɛ adwuma wɔ tebea pɔtee bi a ɛma ahoɔden mu, a wɔtaa da no adi wɔ watt- nnɔnhwerew (W·h) mu. Batere ahoɔden nso wɔ ahoɔden a wɔde susuw nneɛma ho ne ahoɔden ankasa.
Sɛ yɛfa no sɛ batere no kɔ so kari pɛ bere a ɛrepue na ne ahoɔden a ɛtwetwe no yɛ pɛ daa ne ne anyinam ahoɔden a ɛkanyan no, na yɛfa no nso sɛ nneɛma a ɛyɛ adwuma nyinaa de wɔn ho hyɛ nnuru no mu a, ɛnde ɛsɛ sɛ ahoɔden a batere no de ma no ne ne nsusuwii mu ahoɔden a ɛsen biara Wo yɛ pɛ.
Battery ahoɔden a wɔde susuw ho ne adwuma a ɛnyɛ-volume a ɛsen biara a battery no yɛ wɔ ɔhyew a ɛkɔ so daa, nhyɛso a ɛkɔ so daa, ne tebea a ɛtumi dannan mu.
Ahoɔden ankasa (W) kyerɛ ahoɔden a batere de ma ankasa wɔ tebea horow bi a ɛma ahoɔden mu. Wɔde akontaahyɛde na wonya denam tumi ankasa a wɔde bɛbɔ adwumayɛ mu ahoɔden a wɔkyekyem no ho no so. Esiane sɛ wontumi mfa nneɛma a ɛyɛ adwuma a ɛwɔ batere no mu no nni dwuma koraa, na ne ahoɔden a ɛde yɛ adwuma no taa ba fam sen tumi a ɛma anyinam ahoɔden a ɛwɔ nsusuwii mu no nti, ahoɔden ankasa sua sen ahoɔden a wɔde susuw nneɛma ho bere nyinaa.
Ahoɔden pɔtee kyerɛ ahoɔden a batere bi gyae wɔ unit mass anaa unit volume biara mu. Wɔkyerɛ ahoɔden a ɛba wɔ batere no mu duru unit biara mu sɛ ahoɔden pɔtee bi, a wɔtaa susuw wɔ watt- nnɔnhwerew mu wɔ kilogram biara mu (Wh/kg). Wɔkyerɛ ahoɔden a ɛba wɔ battery volume unit biara mu sɛ volumetric specific energy, a wɔtaa da no adi wɔ watt-hours wɔ lita biara mu (Wh/L). Bio nso, wobetumi akyekyɛ adwene a ɛfa ahoɔden pɔtee ho no mu bio ayɛ no nsusuwii (W) ne ankasa (W), baabi a wobetumi de nsɛso (1.9) abu nsusuwii mu ahoɔden pɔtee a ɛyɛ den no ho akontaa:
Wɔ fomula no mu no, K + yɛ electrochemical a ɛne electrode ade a ɛyɛ papa no yɛ pɛ; K- yɛ electrochemical a ɛne electrode ade a enye no yɛ pɛ; na E ne batere no anyinam ahoɔden tumi.
Tumi ne tumi pɔtee bi
Battery ahoɔden kyerɛ ahoɔden a battery de ba bere biara mu wɔ tebea pɔtee bi a ɛma ahoɔden mu, na ne susudua ne watt (W) anaa kilowatt (kW). Sɛ wosusuw saa tumi a efi mu ba yi ho wɔ batere no kɛse anaa ne kɛse ho a, wonya adwene a ɛfa tumi pɔtee bi ho. Titiriw no, mass specific power susuw watt dodow a battery mass unit biako betumi de ama, na ne unit yɛ W/kg; bere a volumetric specific power kyerɛ tumi a battery volume unit bi de ba, na ne unit a ɛne no hyia no yɛ W/L.
Tumi ne ahoɔden pɔtee bi kyerɛ sɛnea batere bi bɛbɔ. Battery ahoɔden a ɛkɔ soro kyerɛ sɛ battery no betumi ayɛ adwuma wɔ current a ɛkɔ soro anaasɛ ahoɔden a ɛkɔ soro mu. Sɛ nhwɛso no, zinc-dwetɛ batere betumi anya tumi pɔtee a ɛboro 100 W/kg bere a ɛrepopa wɔ mprempren density a ɛwɔ mfinimfini mu, a ɛkyerɛ sɛ emu ahoɔden a ɛko tia no sua na ɛyɛ adwuma pa a ɛkɔ soro-rate. Nea ɛne eyi bɔ abira no, zinc-manganese dry cell battery betumi anya tumi pɔtee a ɛyɛ 10 W/kg nkutoo bere a ɛyɛ adwuma wɔ current density a ɛba fam mu, a ɛkyerɛ sɛ emu ahoɔden a ɛko tia kɛse ne high-rate discharge performance a enye. Te sɛ batere ahoɔden no, ahoɔden nso wɔ tumi a wɔde susuw nneɛma ho ne tumi ankasa.
Wobetumi ada tumi a batere wɔ wɔ nsusuwii mu adi sɛnea:
Wɔ fomula no mu no, t yɛ bere; Co ne nsusuwii tumi a battery no tumi yɛ; na me ne mprempren no.
Ɛsɛ sɛ ahoɔden ankasa a ɛwɔ batere no mu yɛ:
Wɔ fomula no mu no, I2R gyina hɔ ma ahoɔden a battery no mu ahoɔden a ɛko tia no de di dwuma. Mfaso biara nni saa tumi yi so ma adesoa a wɔde di dwuma no; ne titiriw no, wɔdan no ɔhyew ahoɔden na woyi fi mu sɛ ɔhyew.
Cycle asetra
Wɔ batere ho no, kyinhyia nkwa nna, anaa sɛnea wɔde di dwuma kyinhyia, yɛ nneɛma atitiriw a ɛkyerɛ sɛnea batere no yɛ adwuma no mu biako. Wɔbu charge-discharge cycle biara a edi mũ sɛ bere tenten ma battery.
Wɔ charge-discharge tebea pɔtee mu no, wɔkyerɛ kyinhyia dodow a battery betumi agyina ano ansa na ne tumi akɔ fam akodu bo pɔtee bi a wɔakyerɛ mu sɛ ne kyinhyia nkwa nna anaa ne dwumadie kyinhyia. Dodow a cycle nkwa tenten no, dodow no ara na battery no cycle adwumayɛ ye.Battery ahorow ahorow da kyinhyia nkwa nna adi; sɛ nhwɛso no, nickel-cadmium batere tumi nya kyinhyia mpempem pii, bere a zinc-dwetɛ batere no wɔ kyinhyia kakraa bi, ebinom mpo nnu ɔha. Ɛfata sɛ yɛhyɛ no nsow sɛ batere a ɛyɛ pɛ mpo betumi anya kyinhyia nkwa nna soronko esiane nsonsonoe a ɛwɔ wɔn mu nhyehyɛe mu nti.
Nneɛma ahorow na ɛka batere nkwa nna a ɛkyinkyini no. Wɔ dwumadie ne nsiesie a ɛfata akyi no, nneɛma titire a ɛdidi soɔ yi nso fa ho: 1 Wɔ charge-discharge cycles mu no, ade a ɛyɛ adwuma no ani so tew nkakrankakra, na ɛde adwumayɛ current density kɔ soro na polarization a ɛyɛ den ba 2 Nneɛma a ɛyɛ adwuma a ɛwɔ electrode ahorow no so no betumi atew anaasɛ akɔ baabi foforo; 3 Bere a battery reyɛ adwuma no, electrode nneɛma bi betumi asɛe; 4 Dendrites a ɛba electrode ahorow no so bere a wɔde sakre retu no betumi ama batere no mu ayɛ tiaa; 5 Ebia nea wɔde yiyi nneɛma mu no asɛe; 6 Ade a ɛyɛ adwuma no ahwehwɛ nsɛso sesa wɔ charge-discharge cycles a wɔtaa yɛ no mu, na ɛnam so ma ne dwumadi so tew.
Storage adwumayɛ
Battery storage performance kyerɛ sɛnea abɔde mu ahoɔden a ɛyera wɔ battery no mu bere a ɛwɔ open-circuit tebea mu wɔ nneɛma a atwa yɛn ho ahyia tebea pɔtee bi mu (te sɛ ɔhyew ne ɔhyew). Wɔsan frɛ saa adeyɛ yi sɛ self-discharge. Sɛ ahoɔden a ɛyera bere a wɔde sie no sua a, ɛkyerɛ sɛ batere no wɔ nneɛma a wɔkora so yiye.
Sɛ batere bi wɔ open-circuit tebea mu, ɛwom sɛ ɛnyɛ anyinam ahoɔden mma abɔnten de, nanso ɛda so ara fa ne ho{1}}discharge nhyehyɛe mu. Saa adeyɛ yi fi thermodynamic a entumi nnyina wɔ electrode ahorow no mu titiriw, na ɛde redox nneyɛe a ɛba ara kwa ba electrode ahorow no ntam. Wɔ tebea a ɛyɛ kusuu mu mpo no, sɛ nsɔano no nnyɛ den sɛnea ɛsɛ a, nneɛma a efi akyi te sɛ mframa anaa nsu a ɛkɔ mu no da so ara betumi akanyan self-discharge effect wɔ battery no mu.
Wobetumi nso ada self-discharge rate adi sɛ nna dodow a egye na battery no tumi so tew akodu bo pɔtee bi bere a wɔde asie, a wonim no sɛ shelf life.Dry shelf life ne wet shelf life wɔ hɔ. Sɛ nhwɛso no, wobetumi de batere a wɔde sie, a wɔmfa electrolyte nka ho ansa na wɔde adi dwuma no asie bere tenten; batere a ɛte saa betumi atra hɔ akyɛ. Wɔfrɛ ade a wɔde electrolyte sie no sɛ nsu a wɔde sie; nsuo a wɔkora so no ma ɛyɛ den ankasa-discharge effect na nsuo shelf nkwa nna tiaa kakra. Sɛ nhwɛso no, zinc-dwetɛ batere betumi anya nkwa nna a ɛyɛ dry mfe 5–8, bere a ne nkwa nna a ɛyɛ nsu no taa yɛ asram kakraa bi pɛ.