Temperature Monitoring in Battery Testing: Wetin Mek I Impɔtant lɛk Vɔltɛm

Atikul

Julay 22, 2023

Tεmprachכ de afekt εvri prכsεs insay wan batri — frכm εlektrokεmikכl riakshכn rεt to εlektrolayt viskositi to SEI film stεbiliti. Fɔ ɔndastand di ifɛkt dɛn we di tɛmpracha kin gɛt na sɔntin we yu fɔ du fɔ mek yu ebul fɔ tɛst ɛn mek di bateri fayn fayn wan. Dis atikul de ɛksplen wetin mek tɛmpracha fɔ gɛt di sem atɛnshɔn lɛk vɔlɔt.

Aw Tɛmpratura De Afɛkt Batri: Frɔm Kwɛstyɔn to Yuzable Kapasiti

Tɛmpratura gɛt kɔmprɛhɛnsif ifɛkt pan di bateri pefɔmɛns. Klose to evri intanal proses — ilektrokemik riakshכn rεt, ilektrolayt viskositi, SEI film stεbiliti — na tεmprachכ-kכntrol. Fɔ ɔndastand dɛn ifɛkt ya na di tin we yu fɔ du fɔ mek yu ebul fɔ tɛst di bateri fayn fayn wan ɛn fɔ mek yu mentenɛns am fayn.

we di tεmprachכ lכw (dכn 0°C), di kapasiti we yu kin yuz kin dכn bכku bכku wan. Fɔ lid-asid batri, na 0°C yusable kapasiti na lɛk 75% pan di rayt; na -10°C, lɛk 50%; na -20°C, i kin bi se na 30% nɔmɔ. dis nכto pεrmanεnt damej — lכw tεmprachכ de ridyus ilektrolayt ayכnik kכnduktiviti, slo riakshכn kεnεtiks, εn inkrεs polarizeshכn, we de ridyus di kapasiti we de fכ sכm tεm. Kapasiti kin kam bak we di tɛmpracha go ɔp. Bɔt, di ay-kɔrɛnt dischaj we di tɛmpracha smɔl kin mek di vɔlɔt sag kwik kwik wan ɛn mek di ikwipmɛnt shutdɔwn, pan ɔl we di rɛsɛdyual kapasiti kin stil de.

pan ay tεmprachכ (abov 30°C), yusable kapasiti de inkrεs fכ sכm tεm (roughly 10% pan 10°C rise fכ lid-asid), bכt di kכst na aksεlεrat layf dεgradashכn. Lid-asid flot layf na 25°C na lɛk 5-8 ia; ɛvri 10°C rayz de roughly haf di layf we lɛf — na 35°C, sɔntɛm na 2-4 ia nɔmɔ lɛf. Dis na bikɔs di ay tɛmpracha de mek di grid kɔrɛshɔn ɛn ilɛktrɔlayt wata kɔnsɔm kwik kwik wan. Lithium-ion batri dεm ikwal sεnsitiv — hεy tεmprachכ de aksεlεrayt SEI film dεkכmכshכn εn εlektrolayt כksidεshכn, we de mek aksεlεrayt kapasiti fεd εn rεpid intanεt rεsistεns rayz.

So, di valyu fɔ tɛmpracha monitarin we dɛn de tɛst batri na dis: di tɛst rizɔlt dɛn we dɛn tek na difrɛn tɛmpracha nɔ kɔmparabl. If yu nɔ rɛkɛd di tɛmpracha we de arawnd di ples we dɛn de tɛst, di analisis we de afta dat nɔ go ebul fɔ no if di chenj dɛn we de apin na di rɛsistɛns de sho se di tɛmpracha de ol ɔ jɔs de chenj di tɛmpracha. Fɔ ɛgzampul, di resistans we dɛn mɛzhɔ insay winta kin ay pas insay di sɔmma nɔto bikɔs di bateri dɔn ol, bɔt bikɔs i bin kol.

Tɛmpratura Kɔmpɛnshɔn: Mek Data Kɔmparabl Akɔs Sizin

Tɛmpratura kɔmpɛnshɔn na wan impɔtant teknɔlɔji we dɛn de du fɔ tɛst batri. I men tin na fɔ pul di tɛmpracha ifɛkt so dat dɛn go kɔmpia di data we dɛn mɛzhɔ difrɛn tɛm dɛn. Di prinsipul: yuz 25°C as di rɛfrɛns tɛmpracha, ɛn kɔrɛkt rizɔlt bays pan di dɛvyayshɔn frɔm rɛfrɛns.

Fכ intanεt rεsistεns tεst, di tipik kכmpεnsεshכn aprכch na: εvri 10°C dεvyayshכn frכm rεfrεns de ajɔst di ridin bay roughly 30% fכ lid-asid batri כ 15% fכ lithium-ion. fכ egzampl, intanεt rεsistεns we dεn mכsu na 10°C as 50 mΩ kכrekt to bכt 35 mΩ na di 25°C rεfrεns. Dis de alaw fɔ kɔmpia dairekt wan bitwin di winta ɛn sɔm ridin.

Fɔ vɔlɔt tɛst, tɛmpracha kɔmpɛnshɔn impɔtant ikwal. di batri opin-sכkyut vכltεj de vεryus bak wit tεmprachכ — lεk 3mV pan 1°C fכ lid-asid. If yu nɔ gɛt kɔmpɛnshɔn, 12.6V we dɛn mɛzhɔ na 5°C ɛn 12.6V we dɛn mɛzhɔ na 35°C kin kɔrɛkt to SOC valyu dɛn we difrɛn pas 10%.

Di PK59B inklud bilt-in tɛmpracha kɔmpɛnshɔn wit wan standad tɛmpracha sɛns fɔ simultaneɔs bateri sɔfa ɛn ambiɛnt tɛmpracha mɛzhɔmɛnt. Di pɔsin we de tɛst kin kɔrɛkt di ridin dɛn ɔtomɛtik wan bay we i de yuz wan prɛs sɛt kɔmpɛnshɔn kɔv — nɔ nid fɔ kɔlkyulɛshɔn wit yu an. insay prεktis, dis de ridyus bכku bכku wan misdiagnosis we kכz fכ tεmprachכ vεryushכn.

Temperature Anomalies: Wan Fɔs Wɔnin Sayn pas Resistans

Insay di bateri we de pwɛl, di tɛmpracha anomaly dɛn kin apin bɔku tɛm bifo di intanɛnt rɛsistɛns go ɔp ɔ di kapasiti kin go dɔŋ we pɔsin kin si. If yu no di tɛmpracha anomaly kwik, dat kin mek yu nɔ lɔs bɔku tin.

di tכpik tεmprachכ anomaly patεn dεm inklud: wan sεl insay wan strכng we de rכn sכmtεm hכt pas כda wan dεm we dεn de chaj (dεn de sho se intanεt sכt כ siriכs sכlfεshכn); di ɔl string we de rɔn kɔntinyu fɔ wam di tɛm we di flot de chaj (we de sho se dɛn sɛt di flot vɔlɔt tu ay); slo tεmprachכ rεkכvεshכn afta dischaj (sכgεst εksyכs intanεt impedans). If dɛn kin kech dɛn tɛmpracha anomaly ya kwik, dɛn kin tek kɔrɛkt akshɔn bifo katastrofik fayl — tɛmal rɔnawe ɔ kapasiti lɔs to ziro.

Di we aw dɛn de ditekshɔn dipen pan di kɔnfigyushɔn fɔ di ikwipmɛnt. Di simpul we fɔ du am na bateri tɛsta wit tɛmpracha kapabiliti (lɛk di PK59B), we de rikodɔ tɛmpracha nia ɛni intanɛnt rɛsistɛns tɛst. Mɔ advans na wan onlayn tɛmpracha monitarin sistɛm wit sɛns pan ɛni sɛl, data we dɛn kin kɔntinyu fɔ ɔplod to wan monitarin ɔs. Fɔ bɔku pan di tɛlikɔm ɛn UPS sayt dɛn, tɛmpracha tɛst we dɛn kin du ɔltɛm we dɛn jɔyn wit intanɛnt rɛsistɛns tɛst na infεkt fɔ kech bɔku pan di tɛmpracha anomaly.

Fil Praktis Point fɔ Tɛst fɔ Tɛmpratura

Tɛmpratura tɛst kin tan lɛk se i simpul bɔt i gɛt opareshɔnal ditil dɛn we fayn fɔ notis. Fɔs: usay fɔ mɛzhɔ. Tempracha distribyushɔn insay bateri nɔ yunifom — tɛminal ɛn kɔnɛkshɔn dɛn de rɔn hot pas di bɔdi bikɔs ɔf Joule ɔt frɔm kɔntakt rɛsistɛns. So, mɛzhɔ na di bateri bɔdi (mid-shɛl) as di praymari rɛfrɛns, wit tɛminal tɛmpracha as sɛkɔndari. if di tεrminal tεmprachכ pas di bכdi tεmprachכ pas 10°C, i go bi se di kכnεkshכn dεm go lכs εn nid fכ tayt.

Sɛkɔn: ustɛm fɔ mɛzhɔ. Batri tɛmpracha kin go ɔp we i de chaj, bak we i de dischaj, ɛn smɔl smɔl i kin go bak to di say we i de we i de rɛst. Fɔ kɔmparabiliti akɔs tɛst, rikodɔ tɛmpracha na wan kɔnsistɛns pɔynt na di tɛst saykl — fɔ ɛgzampul, ɔltɛm di tɛm we stebul flot chaj, ɔ ɔltɛm na di ɛnd fɔ dischaj. If di say dɛn we dɛn de mɛzhɔ difrɛn, di tɛmpracha data kin at fɔ analayz.

Tɔd: aw fɔ ɛksplen. Wan singl tɛmpracha ridin de sho ɔl di mɔnt we dɛn mɛzhɔ ɛn dɛn fɔ kɔmpia am wit di tɛmpracha we de rawnd am. If di bateri bɔdi tɛmpracha pas di ambiɛnt pas 5°C, abnɔmal intanɛnt ɔt de apin ivin if absɔlɔb tɛmpracha stil smɔl. if di sεl tεmprachכ insay wan strכng difrεn pas 3°C, di sεl inkכnsistεns de de.

Praktikal Advays: Integret Tɛmpratura insay Batri Wɛlbɔdi Asɛsmɛnt

Fɔ di mentenɛns tim dɛn, intagret tɛmpracha tɛst insay di bateri mentenɛns prosidyuz dɛn we de naw. Tim dɛn we gɛt PK59A kin ad infrarɛd tɛmɔmɔta as tɛmpracha sɔpɔtmɛnt; tim dɛn we gɛt PK59B de yuz di standad sɛns dairekt wan. I nɔ mata us tul, di men tin na fɔ rikodɔ tɛmpracha nia ɛni tɛst.

Fɔ di wan dɛn we de bay na eria dɛn we gɛt bɔku bɔku tɛmpracha chenj (tropik rijyɔn, tɛmpracha zon wit 4 difrɛn sizin), prɔyoritɛt mɔdel dɛn wit tɛmpracha tɛst kapabiliti (PK59B). Mis temperechur data dramatikli ridyus di analyzability of test rizulyt — yu kin invɛst di sem tɛm ɛn ɛfɔt fɔ tɛst bɔt yu nɔ kin ebul fɔ no if di rizulyt nɔmal if yu nɔ gɛt tɛmpracha kɔntɛks.

We wi de luk bifo, bateri mentenɛns de evolv to mɔlti-paramita kɔmprɛhɛnsif asɛsmɛnt — intanɛnt rɛsistɛns, vɔlɔt, tɛmpracha, chaj-dischaj istri, ɛn envayrɔmɛnt kɔndishɔn dɛn we dɛn jɔyn tru data analisis fɔ prodyuz wan kɔmpɔzit bateri wɛlbɔdi skɔ. Tεmprachכ na wan indispεnsεbl paramita na dis sistεm. View the Battery Test Instruments Collection