Ɔberɛfɛw da 18, afe 2022
Mfinimfini ahoɔden a ɛko tia ho sɔhwɛ ma wonya mfaso a eye sen biara wɔ sika a wɔde asie wɔ batere siesie mu. Ɛho nhia sɛ wɔto nhyehyɛe no mu, enhia mfiri a wɔde yi batere, na ɛwie batere ho nhwehwɛmu a edi mũ wɔ simma kakraa bi mu. Saa asɛm yi hwehwɛ adwinnade a ɛde emu ahoɔden a ɛko tia no bata batere a ɛbɔ akwakoraa ne aberewa ho, ne sɛnea ɛko tia ho nsɛm ma wotumi siesie nneɛma a wɔahyɛ ho nkɔm.
Sɛ obi bɛkyerɛ mfaso a ɛwɔ sɔhwɛ a wɔde sɔ nneɛma a ɛko tia nyarewa no mu a, ɛsɛ sɛ odi kan te nea batere mu ahoɔden a ɛko tia no yɛ ankasa ase. Ɛnyɛ honam fam dodow biako na mmom ɛyɛ nneɛma pii a wɔabom ayɛ叠加 a efi honam fam nneɛma ahorow mu.
Nea edi kan ne ohmic resistance, a wɔsan frɛ no DC mu resistance, a efi resistivity a electrode nneɛma, ionic conductivity a electrolyte, ne contact resistance wɔ electrode-current collector interfaces. Ohmic resistance bua ntɛmntɛm — mfiase voltage drop bere a wɔde adesoa di dwuma no fi ohmic resistance titiriw. Ɛkɔ soro nkakrankakra bere a obi nyin bere a electrode nneɛma no yɛ granulate na current collectors no sɛe no.
Nea ɛto so abien ne electrochemical polarization resistance, efi kinetic resistance a redox reactions wɔ electrode ani. Sɛ wɔtow gu a, nneɛma a ɛyɛ nnam a ɛwɔ electrode ahorow no so no fa oxidation-reduction reactions a ɛwɔ activation ahoɔden akwanside. Polarization resistance kyekye nkakrankakra wɔ adesoa application akyi na stabilizes wɔ steady tebea. Ɛkɔ soro bere a obi nyin bere a nneɛma a ɛyɛ adwuma no yera na baabi a ɛyɛ adwuma no so tew no.
Nea ɛto so abiɛsa ne concentration polarization resistance, efi concentration gradients wɔ electrolyte a ɛbɛn electrode ani. Bere a wɔretu no, ions a ɛyɛ adwuma no di dwuma wɔ electrode ahorow no so; sɛ electrolyte mass transfer ntumi nkɔ so a, electrode no ani dodow twe ne ho fi dodow no ho, na ɛma voltage foforo kɔ fam. Concentration polarization yɛ nea ɛho hia wɔ discharge rates a ɛkorɔn nkutoo mu na ɛnyɛ hwee wɔ rates a ɛba fam mu.
Nea ɛto so anan ne contact resistance, a weld joints a ɛda tabs ne plates ntam, seals a ɛda battery covers ne terminals ntam, ne abɔnten nkitahodi (bolts, busbars) ka ho. Contact resistance yɛ relatively stable wɔ nkwa nna nyinaa mu nanso ebetumi spike mpofirim bere a connections loosen anaasɛ corrode — a ɛyɛ pɛpɛɛpɛ sɛnea emu resistance sɔhwɛ hu connection mfomso.
Saa nneɛma anan yi ntease ho hia efisɛ emu sɔhwɛ a wɔde ko tia nyarewa no wɔ nkate soronko wɔ onyin fã ahorow ho. Ohmic resistance yɛ nea ɛyɛ mmerɛw kɛse wɔ onyin ntɛm ho; polarization a ɛko tia onyin a ɛwɔ mfinimfini; concentration polarization ho hia wɔ dodow a ɛkorɔn nkutoo mu. Eyi kyerɛ sɛ emu ahoɔden a wɔko tia ho sɔhwɛ no fata yiye ma onyin a wohu ntɛm ne mfinimfini, na ɛnyɛ tẽẽ kɛse mma tumi a ɛkɔ fam wɔ ɔfã a etwa to no.
Batere a ɛbɔ akwakoraa ne aberewa no kyerɛ sɛ tumi a ɛwɔ mu no yera na emu ahoɔden a ɛko tia no kɔ soro bere koro mu, nanso abien no nnya nkɔso wɔ bere koro mu. Wɔ nkwa 60-70% a edi kan no mu no, tumi a ɛyera no yɛ brɛoo yiye bere a emu ahoɔden a ɛko tia no kyerɛ nkɔanim a wotumi susuw. Wɔ nkwa 30% a etwa to no mu no, tumi no kɔ fam ntɛmntɛm bere a ɔsɔretia no yɛ kɛse dedaw. Saa bere mu nsonsonoe yi ne bo titiriw a ɛwɔ emu ahoɔden a wɔko tia sɔhwɛ mu sɛ adwinnade a wɔde siesie nneɛma a wɔahyɛ ho nkɔm.
Fa 2V telecom battery a wɔtaa de di dwuma a ɛwɔ mfe 10-15 float-life design. Wɔ mfeɛ 5-7 a ɛdi kan no mu no, tumi no betumi akɔ fam afiri 100% akosi 90%+ pɛ — ɛnyɛ den sɛ adwumayɛfoɔ a wɔhwɛ so no bɛka sɛ battery no da so ara wɔ apɔwmuden. Nanso wɔ saa bere koro no ara mu no, ebia na emu ahoɔden a ɛko tia no abu abɔ ho abien anaa nea ɛboro saa dedaw fi adwumayɛbea bo a ɛyɛ bɛyɛ 20 mΩ kosi 40-50 mΩ. Sɛ adwene no kanyan bere a wotumi hu sɛ tumi no so tew (a ɛba fam 80% SOH) nkutoo a, mfɛnsere a eye sen biara a wɔde besi ananmu no atwam dedaw — batere no da so ara yɛ adwuma nanso akɔhyɛn ahoɔhare a ɛkɔ fam mu na ebetumi adi nkogu wɔ bere a edi hɔ a ɛretwa mu no mu.
Mfaso a ɛto so abien a ɛwɔ sɔhwɛ a wɔde sɔ nipadua no mu ahoɔden a ɛko tia nyarewa no so ne sɛ wobehu nneɛma a ɛnkari pɛ a ɛnyɛ anifere. Wɔ battery ahama biako mu no, sɛ cell biako kyerɛ bɛboro 30% a ɛkorɔn a ɛko tia sen kuw no mu nkyekyem — sɛ mpo ne bo a ɛsom koraa da so ara wɔ spec mu a — ɛfata sɛ wɔde adwene si so. Ebia saa nkwammoaa no wɔ sintɔ bi wɔ ne yɛ mu (weld a enye) anaasɛ enyin ntɛm (electrolyte a ɛso tew). Sɛ yɛannyɛ emu nhyiamu nhwehwɛmu, a yɛhwɛ aggregate string voltage nko ara a, ɛkame ayɛ sɛ anomalies a ɛte saa no yɛ nea ɛrentumi nyɛ yiye sɛ wobehu — aggregate voltage averages across all cells, diluting any single anomaly.
Wobetumi akyekyɛ akwan a wɔfa so sɔ nneɛma a ɛko tia nyarewa no mu akuwakuw denam sɔhwɛ tebea ne pɛpɛɛpɛyɛ a wɔhwehwɛ so. Nea ɛyɛ mmerɛw sen biara ne nsa mu mita a ɛko tia: fa clips bata battery terminals no ho, mia sɔhwɛ button no, kenkan bo a ɛsom no. Mfaso a ɛwɔ so ne sɛ ɛnyɛ den, ɛho ka sua, na wonni nnwinnade a ɛboa; ɔhaw ahorow ne nkwammoaa biako a wɔde di dwuma bere koro mu, nsaano data a wɔkyere gu kasɛt so, ne akenkan ahorow a ɛte nka wɔ clip contact resistance ho.
Ɔfã a ɛto so abien ne adesoa a egyina emu ahoɔden ano sɔhwɛ, a AC injection ne DC discharge akwan ka ho. AC injection de current ketewa bi a wonim a ɛwɔ frequency pɔtee bi (mpɛn pii no 1kHz) kɔ battery no mu na ɛsusuw AC voltage a ɛkɔ fam no de bu resistance. Mfaso a ɛwɔ so: battery no ntumi nkɔ mu ankasa, ɛwɔ intanɛt so koraa; ɔhaw: susuw AC mu ahoɔden a ɛko tia, a ɛsono DC mu ahoɔden a ɛko tia. DC discharge de DC adesoa a ɛkyɛ (mpɛn pii no amps du du ma 100ms kosi sekan 1) di dwuma na ɛsusuw voltage nsonsonoe ansa na adesoa aba ne akyi de bu DC mu resistance. Mfaso: susuw nokware DC mu ahoɔden; disadvantage: de adesoa bi di dwuma, a ɛwɔ akwanside bi wɔ intanɛt so adwumayɛ mu.
Ɔfã a ɛto so abiɛsa ne intanɛt so nhyehyɛe a wɔde hwɛ sɛnea ɛko tia: daa sensor ahorow a wɔde ahyɛ cell biara so, data a wɔde fa bɔs so kɔ host a wɔhwɛ so. Mfaso: 24/7 kɔ so hwɛ a wɔde automatic recording ne analysis; ɔhaw ahorow: ɛho ka yɛ den na ɛyɛ den sɛ wɔde besisi hɔ, a ɛfata ma nnwuma a wotumi de ho to so kɛse nkutoo (data centers, keteke akwantu).
PK59C ne PK59D te ntam a ɛto so abien ne abiɛsa — nsa mfiri a wɔde DC discharge susuw di dwuma, de pɛpɛɛpɛyɛ ne ahotoso ma koraa sen AC-injection nsa mita a wɔtaa de di dwuma. Wɔ telecom base station ne UPS nsiesie tebea dodow no ara mu no, eyi gyina hɔ ma ɛka a wɔbɔ no yiye.
Mfaso ankasa a ɛwɔ mu sɔhwɛ a ɛko tia so no nni susudua biako so na mmom bere tenten data a wɔboaboa ano ne nea ɛrekɔ so nhwehwɛmu mu. Akenkan biako na ɛkyerɛ wo tebea a ɛwɔ hɔ mprempren; adeyɛ bi a ɛkɔ so kyerɛ wo baabi a batere no rekɔ.
Adeyɛ a ɛyɛ fapem ne sɛ wɔbɛkyekye batere akwahosan ho kyerɛwtohɔ. Sɔhwɛ biara akyi no, kyerɛw emu ahoɔden a ɛko tia, ahoɔden a ɛwɔ mu, da a wɔsɔɔ hwɛe, ne ɔhyew a ɛwɔ baabiara ma nkwammoaa biara. Anyɛ yiye koraa no, ɛsɛ sɛ wɔsɔ sɔhwɛ yɛ asram abiɛsa biara, ɔsram biara ma telefon so nkitahodi mmeae a ɛho hia. Ɛsɛ sɛ wɔyɛ data no ho mfonini sɛ bere-toatoaso curves wɔ cell biara mu. Nkwammoaa a ɛte apɔw da su bi a ɛkɔ soro nkakrankakra na ɛyɛ pintinn adi. Nkwammoaa a ne ahoɔden a ɛko tia no huruw mpofirim wɔ bere tiaa bi mu — sɛ mpo ne bo a ɛsom koraa no da so ara sua a — kyerɛ sɛ biribi a ɛnteɛ a ɛhwehwɛ sɛ wɔyɛ nhwehwɛmu foforo.
Setting预警 thresholds yɛ anammɔn titiriw a edi hɔ. Thresholds ntumi nyɛ biako-a-ɛfata-obiara — battery ahorow ahorow, wɔn a wɔyɛ, ne adansi nhyehyɛe ahorow wɔ soronko koraa resistance values ne rates of change. Ɔkwan a mfaso wɔ so: fa batere foforo adwumayɛbea bo no di dwuma sɛ mfiase, hyehyɛ kɔkɔbɔ gyinabea abien — KƆBƆ wɔ 1.5× adwumayɛbea bo, ADWUMA wɔ 2× adwumayɛbea bo. Sɛ factory data nni hɔ a, fa battery batch foforo a ɛwɔ batch koro no ara mu no nkyɛmu di dwuma sɛ reference, anaa fa kɔkɔbɔ threshold no si 1.3× resistance a ɛba fam koraa wɔ kuw koro no ara mu.
Nneɛma a ɛrekɔ so nhwehwɛmu a ɛkɔ akyiri ma wotumi hyɛ nkwa a aka ho nkɔm. Ɛdenam resistance-versus-time curve a ɔbɛfata so no, obi betumi asusuw bere a resistance no du huammɔdi no ho, na ahyɛ ɔsom nkwa nna a aka ho nkɔm. Wɔde saa kwan yi adi dwuma dedaw wɔ batere sikakorabea akɛse sohwɛ mu wɔ telecom ne data center nnwuma mu, nanso ennya nyɛɛ gyinapɛn wɔ akuw nketewa a wɔhwɛ so no mu. Bere a sɔhwɛ ho nsɛm boaboa ano na nhwehwɛmu nnwinnade tu mpɔn no, saa kwan a wɔfa so hyɛ nkɔm yi de nkakrankakra bɛyɛ nnwuma gyinapɛn.
Awiei koraa no, ɛsɛ sɛ wɔde emu resistance data ka data afoforo ho. Ɔsɔretia a ɛkɔ soro no yɛ ade titiriw a ɛkyerɛ onyin, nanso ɛnyɛ ɛno nkutoo. Ambient temperature, float voltage history, charge-discharge cycles, ne string consistency data, sɛ wɔka bom a, ɛma wotumi si gyinae a edi mu wɔ nsiesie ho. Sɛ nhwɛso no, cell a ɛwɔ resistance a ɛkorɔn a wɔakɔ so abɔ no nso betumi ayɛ charge management asɛm sen sɛ battery adi huammɔ — sɛ wɔde besi ananmu a, ɛbɛsɛe ade a wɔda so ara de di dwuma.
Wɔ nsiesie akuo fam no, sɛ wɔde emu ahoɔden a wɔko tia sɔhwɛ bɛka akwan a wɔyɛ daa ho a, ɛhia sɛ wɔde nnwinnadeɛ foforɔ bi bɛto mu — sɛ mfonini biara a ɛfiri PK59A kɔsi PK59D no wɔ hɔ dedaw a, emu ahoɔden a ɛko tia sɔhwɛ tumi no wɔ hɔ. Nea ehia ne sɛ wɔbɛhyehyɛ adwumayɛ nhyehyɛe a wɔde sɔ hwɛ ne nhyehyɛe ahorow a wɔde hwɛ data so.
Sɔhwɛ adwumayɛ nhyehyɛe a wɔkamfo kyerɛ: susuw emu ahoɔden a ɛko tia sɛ mfiase wɔ batere foforo a wogye tom mu; sɔ hwɛ bere ne bere mu wɔ ɔsom bere mu (asram abiɛsa biara, ɔsram biara ma mmeae a ɛho hia); susuw nkwammoaa biara mmiako mmiako afei nea wɔaboaboa ano no; kyerɛw emu resistance, voltage, ne ambient temperature ma sɔhwɛ biara; frankaa nkwammoaa a ɛwɔ ahoɔden a ɛnteɛ a wɔde bedi akyi; yɛ batere akwahosan ho amanneɛbɔ a ɛba asram abiɛsa biara.
Sɛ wopɛ data sohwɛ a, fa Excel di dwuma ma nsenia nketewa (nkwaboaa du kosi ɔhaha pii) a ɛwɔ pon nhyehyɛe a wɔateɛ so ne nhyehyɛe a wɔayɛ no foforo. Sɛ wopɛ nsenia a ɛwɔ mfinimfini (ɔhaha kosi mpempem) a, susuw softwea a wɔde hwɛ batere so a ɛyɛ adwumaden ho. Wɔ akɛseɛ (mpempem kɔsi mpempem du du) fam no, nsiesie nhyehyɛeɛ a ɛwɔ mfimfini a wɔde afrafra ahɔhoɔ a wɔhwɛ so ne SCADA no fata.
Wɔ adetɔfoɔ a wɔda so ara wɔ paw fã no mu no, fa mfiri a ɛboa emu resistance testing di kan. Bere a mita a ɛko tia nneɛma a ɛwɔ mu no bo boro voltmeter a ɛnyɛ den so no, mfaso a wonya fi sika a wɔde asie so no yɛ kɛse bere a wɔde toto bere a batere no di huammɔ a wɔkwati no ho no. Telecom base station batere biako a asɛe no betumi ama wɔahwere mpempem du du kosi ɔpehaha pii wɔ adwumayɛ mu ntwitwiridii mu, bere a emu resistance tester bo yɛ mpempem kakraa bi pɛ. View the Battery Test Instruments Collection
Ka wo project scenario ne ahwehwɛdeɛ kyerɛ yɛn, na yɛbɛma ano aduru a ɛfata no ahyia na yɛde quote ama wɔ nnɔnhwereɛ 24 ntam.
Nya Quote a Wɔde Ma KwaPK59A storage battery tester, PK59B tester with temperature, PK59C battery internal resistance tester, PK59D premium resistance tester — four series covering the complete needs from basic capacity/voltage/resistance testing to high-precision internal resistance consistency analysis. Handheld design, online testing supported, multi-chemistry compatible — designed for battery maintenance and acceptance at telecom base stations, UPS, and data centers.
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