Fage

Yayin caji da fitar da batura, ƙarfin zai yi tasiri ta hanyar wuce gona da iri da juriya na ciki ke haifarwa.A matsayin ma'auni mai mahimmanci na baturi, juriya na ciki ya cancanci bincike don nazarin lalacewar baturi.Juriya na ciki na baturi ya ƙunshi:

• Ohm juriya na ciki (R_Ω) -Juriya daga shafuka, electrolyte, SEPARATOR da sauran abubuwan haɗin gwiwa.
• Yayi cajin juriya na ciki (R_ct) -Juriya na ions wucewa shafuka da electrolyte.Wannan yana wakiltar wahalar amsawar shafuka.A al'ada za mu iya ƙara yawan aiki don rage wannan juriya.
• Resistance Polarization (R_mt) shine juriya na ciki wanda ke haifar da ƙarancin ƙarancin lithium ions tsakanincathodeda anode.Juriya na Polarization zai kasance mafi girma a yanayi kamar caji a ƙasazafin jikiko babban caji.

Kullum muna auna ACIR ko DCIR.ACIR shine juriya na ciki da aka auna a cikin 1k Hz AC halin yanzu.Wannan juriya na ciki kuma ana kiranta da juriya na Ohm.Thekarancina bayanan shine cewa ba zai iya nuna aikin baturi kai tsaye ba.Ana auna DCIR ta hanyar daɗaɗɗen halin yanzu na tilastawa a cikin ɗan gajeren lokaci, wanda ƙarfin lantarki ya ci gaba da canzawa.Idan halin yanzu na yanzu shine I, kuma canjin ƙarfin lantarki a cikin ɗan gajeren lokaci shineΔＵ, bisa ga dokar OhmＲ＝ΔＵＩZa mu iya samun DCIR.DCIR ba game da juriya na ciki ne kawai na Ohm ba, har ma yana cajin juriya na canja wuri da juriya na polarization.

Bincike kan matsayin kasar Sin da sauran kasashe

It's koyaushe yana da wahala akan binciken DCIR na baturin lithium-ion.Yana's galibi saboda juriyar ciki na batirin lithium-ion karami ne, yawanci wasu mΩ.A halin yanzu a matsayin sashi mai aiki, yana da wuya a auna juriya na ciki kai tsaye.Bayan haka, yanayin yanayi yana rinjayar juriya na ciki, kamar yanayin zafi da caji.A ƙasa akwai ƙa'idodi waɗanda aka ambata game da yadda ake gwada DCIR.

• Matsayi na duniya:

IEC 61960-3: 2017:Kwayoyin na biyu da batura masu dauke da alkaline ko wasu electrolytes marasa acid - Kwayoyin lithium na biyu da batura don aikace-aikacen šaukuwa - Kashi na 3: Kwayoyin sakandare na Prismatic da cylindrical lithium da batura da aka yi daga su.

IEC 62620: 2014:Kwayoyin na biyu da batura masu ɗauke da alkaline ko wasu electrolytes marasa acid - Kwayoyin lithium na biyu da batura don amfani a aikace-aikacen masana'antu.

• Japan:JIS C 8715-1:2018: Kwayoyin lithium na biyu da batura don amfani a aikace-aikacen masana'antu - Kashi 1: Gwaji da buƙatun aiki
• Kasar Sin ba ta da ma'auni mai dacewa game da gwajin DCIR.

Iri

Hanyoyin gwaji iri ɗaya ne a tsakaninIEC 61960-3: 2017,Farashin IEC62620:2014kumaJIS C 8715-1:2018.Babban bambance-bambancen su ne kamar haka:

1. Yanayin gwaji ya bambanta.IEC 62620: 2014 daJIS C 8715-1:2018tsarin 5℃mafi girma na yanayin zafi fiye da IEC 61960-3: 2017.Ƙananan zafin jiki zai sa ya fi danko na electrolyte, wanda zai haifar da ƙananan motsi na ions.Don haka halayen sinadaran za su yi hankali, kuma juriya na Ohm da juriya na polarization za su zama mafi girma, wanda zai haifar da haɓakar haɓakar DCIR.
2. SoC ya bambanta.Ana buƙatar SoC a cikiFarashin IEC62620:2014kumaJIS C 8715-1:2018shine 50±10）, yayin daIEC 61960-3: 2017shine 100%.Matsayin caji yana da tasiri sosai ga DCIR.Yawanci sakamakon gwajin DCIR zai ragu tare da karuwar SoC.Wannan yana da alaƙa da hanyar amsawa.A cikin ƙananan SoC,juriya canja wurin cajiR_ct zai zama mafi girma;kumaR_ct zai ragu tare da haɓakar SoC, don haka kamar yadda DCIR.
3. Lokacin fitarwa ya bambanta.IEC 62620: 2014 da JIS C 8715-1: 2018 suna buƙatar tsawon lokacin fitarwa fiye daIEC 61960-3: 2017.Dogon bugun bugun jini zai haifar da raguwar haɓakar yanayin DCIR, kuma yana nuna karkata daga layi.Dalilin shi ne cewa karuwar lokacin bugun jini zai haifar da mafi girmaR_ct kuma zamarinjaye.
4. Matsalolin fitarwa sun bambanta.Koyaya fitarwa na yanzu ba lallai bane kai tsaye yana da alaƙa da DCIR.An ƙaddara dangantakar tadazane.
5. Ko da yakeJIS C 8715-1:2018yana nufinFarashin IEC62620:2014, suna da ma'anoni daban-daban akan manyan batura masu ƙima.Farashin IEC62620:2014ya bayyana cewa manyan batura masu ƙima ba za su iya fitar da ƙasa da 7.0C na halin yanzu ba.WhileJIS C 8715-1:2018ya bayyana manyan batura waɗanda za su iya fitarwa da 3.5C.

Nazari akan Gwaji

A ƙasa akwai ginshiƙi aikin lokacin ƙarfin lantarki na ma'aunin gwajin DCIR.Lanƙwasa yana nuna juriya na sel, don mu iya kimanta aikin.

• Kamar yadda aka nuna a hoton, jajayen kiban suna wakiltarR_Ω. Ƙimar tana da alaƙa da iR-drop.iR-drop yana nufin canjin ƙarfin lantarki kwatsam bayan canjin halin yanzu.A al'ada lokacin da tantanin halitta ya sami wutar lantarki, akwai'sa drop na ƙarfin lantarki.Don haka za mu iya sanin cewaR_Ω na cell ne0.49mΩ.
• Koren kibiya tana wakiltarR_ct. R_ct kumaR_mt bukatar wani lokaci don kunnawa.Yawanci yana faruwa bayan saukarwar Ohm Voltage.DarajarR_ct za a iya auna 1ms bayan canji na yanzu.Darajar ita ce0.046mΩ.A al'adaR_ct zai ragu tare da haɓakar SoC.
• Kibiya mai shuɗi tana wakiltar canjinR_mt. Wutar lantarki yana ci gaba da raguwa saboda lithium-ion wanda bai dace ba.DarajarR_mt is 0.19mΩ 

Kammalawa

Gwajin DCIR na iya nuna aikin batura.Yana's kuma ma'auni mai mahimmanci don R&D.Duk da haka akwai wasu batutuwa da za a yi la'akari da su don kiyaye daidaiton ma'auni.

• Ya kamata a yi la'akari da hanyar haɗin kai tsakanin batura da caji da kayan fitarwa.Haɗin juriya yakamata ya zama ƙasa kaɗan gwargwadon yiwuwa (ba da shawarar kada ya fi girma0.02mΩ).
• Haɗin wutar lantarki da wayoyi tara na yanzu yana da mahimmanci.It zai fi kyau a haɗa a gefe ɗaya na shafuka.Ya kamata a lura cewa kada ku haɗa wayoyi masu tarin yawa zuwa wayoyi masu caji na kayan aiki.
• Hakanan yakamata a yi la'akari da daidaiton caji da kayan fitarwa da lokacin amsawa.An ba da shawarar lokacin amsawa bai wuce 10ms ba.Gajeren lokacin amsawa, mafi daidaiton sakamako.