{"id":2909,"date":"2024-05-29T08:15:00","date_gmt":"2024-05-29T08:15:00","guid":{"rendered":"http:\/\/www.kmdpower.com\/?p=2909"},"modified":"2024-10-18T08:24:49","modified_gmt":"2024-10-18T08:24:49","slug":"degradation-analysis-of-commercial-lithium-ion-batteries-in-long-term-storage","status":"publish","type":"post","link":"https:\/\/www.kmdpower.com\/cs\/news\/degradation-analysis-of-commercial-lithium-ion-batteries-in-long-term-storage\/","title":{"rendered":"Anal\u00fdza degradace komer\u010dn\u00edch lithium-iontov\u00fdch bateri\u00ed p\u0159i dlouhodob\u00e9m skladov\u00e1n\u00ed"},"content":{"rendered":"
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Anal\u00fdza degradace komer\u010dn\u00edch lithium-iontov\u00fdch bateri\u00ed p\u0159i dlouhodob\u00e9m skladov\u00e1n\u00ed. Lithium-iontov\u00e9 baterie se staly nepostradateln\u00fdmi v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch d\u00edky sv\u00e9 vysok\u00e9 energetick\u00e9 hustot\u011b a \u00fa\u010dinnosti. Jejich v\u00fdkon se v\u0161ak v pr\u016fb\u011bhu \u010dasu zhor\u0161uje, zejm\u00e9na p\u0159i del\u0161\u00edm skladov\u00e1n\u00ed. Pochopen\u00ed mechanism\u016f a faktor\u016f ovliv\u0148uj\u00edc\u00edch tuto degradaci je z\u00e1sadn\u00ed pro optimalizaci \u017eivotnosti bateri\u00ed a maximalizaci jejich \u00fa\u010dinnosti. Tento \u010dl\u00e1nek se zab\u00fdv\u00e1 anal\u00fdzou degradace komer\u010dn\u00edch lithium-iontov\u00fdch bateri\u00ed p\u0159i dlouhodob\u00e9m skladov\u00e1n\u00ed a nab\u00edz\u00ed realizovateln\u00e9 strategie pro zm\u00edrn\u011bn\u00ed poklesu v\u00fdkonu a prodlou\u017een\u00ed \u017eivotnosti bateri\u00ed.<\/p>

\u00a0<\/p>

Kl\u00ed\u010dov\u00e9 mechanismy degradace:<\/h2>

Samovyb\u00edjen\u00ed<\/h3>

Vnit\u0159n\u00ed chemick\u00e9 reakce v lithium-iontov\u00fdch bateri\u00edch zp\u016fsobuj\u00ed postupnou ztr\u00e1tu kapacity i v dob\u011b, kdy je baterie v klidu. Tento proces samovyb\u00edjen\u00ed je sice obvykle pomal\u00fd, ale m\u016f\u017ee b\u00fdt urychlen vy\u0161\u0161\u00ed teplotou p\u0159i skladov\u00e1n\u00ed. Hlavn\u00ed p\u0159\u00ed\u010dinou samovyb\u00edjen\u00ed jsou vedlej\u0161\u00ed reakce vyvolan\u00e9 ne\u010distotami v elektrolytu a drobn\u00fdmi vadami v materi\u00e1lech elektrod. Zat\u00edmco p\u0159i pokojov\u00e9 teplot\u011b prob\u00edhaj\u00ed tyto reakce pomalu, jejich rychlost se zdvojn\u00e1sobuje s ka\u017ed\u00fdm zv\u00fd\u0161en\u00edm teploty o 10 \u00b0C. Proto skladov\u00e1n\u00ed bateri\u00ed p\u0159i teplot\u00e1ch vy\u0161\u0161\u00edch, ne\u017e je doporu\u010deno, m\u016f\u017ee v\u00fdrazn\u011b zv\u00fd\u0161it rychlost samovyb\u00edjen\u00ed, co\u017e vede k podstatn\u00e9mu sn\u00ed\u017een\u00ed kapacity p\u0159ed pou\u017eit\u00edm.<\/p>

\u00a0Reakce na elektrod\u00e1ch<\/span><\/p>

Vedlej\u0161\u00ed reakce mezi elektrolytem a elektrodami vedou k tvorb\u011b vrstvy rozhran\u00ed pevn\u00e9ho elektrolytu (SEI) a degradaci elektrodov\u00fdch materi\u00e1l\u016f. Vrstva SEI je nezbytn\u00e1 pro norm\u00e1ln\u00ed provoz baterie, ale p\u0159i vysok\u00fdch teplot\u00e1ch se d\u00e1le zahu\u0161\u0165uje, spot\u0159ebov\u00e1v\u00e1 ionty lithia z elektrolytu a zvy\u0161uje vnit\u0159n\u00ed odpor baterie, \u010d\u00edm\u017e sni\u017euje jej\u00ed kapacitu. Vysok\u00e9 teploty nav\u00edc mohou destabilizovat strukturu elektrodov\u00e9ho materi\u00e1lu, zp\u016fsobit trhliny a rozklad, co\u017e d\u00e1le sni\u017euje \u00fa\u010dinnost a \u017eivotnost baterie.<\/p>

\u00a0Ztr\u00e1ta lithia<\/span><\/p>

B\u011bhem cykl\u016f nab\u00edjen\u00ed a vyb\u00edjen\u00ed se n\u011bkter\u00e9 ionty lithia trvale zachyt\u00ed v m\u0159\u00ed\u017ekov\u00e9 struktu\u0159e elektrodov\u00e9ho materi\u00e1lu, \u010d\u00edm\u017e se stanou nedostupn\u00fdmi pro dal\u0161\u00ed reakce. Tato ztr\u00e1ta lithia se zvy\u0161uje p\u0159i vysok\u00fdch teplot\u00e1ch skladov\u00e1n\u00ed, proto\u017ee vysok\u00e9 teploty podporuj\u00ed nevratn\u00e9 usazen\u00ed v\u011bt\u0161\u00edho po\u010dtu iont\u016f lithia v m\u0159\u00ed\u017ekov\u00fdch defektech. V d\u016fsledku toho se sni\u017euje po\u010det dostupn\u00fdch iont\u016f lithia, co\u017e vede k poklesu kapacity a zkr\u00e1cen\u00ed \u017eivotnosti cyklu.<\/p>

\u00a0<\/p>

Faktory ovliv\u0148uj\u00edc\u00ed rychlost degradace<\/h2>

Skladovac\u00ed teplota<\/h3>

Teplota je hlavn\u00edm faktorem degradace baterie. Baterie by m\u011bly b\u00fdt skladov\u00e1ny v chladn\u00e9m a such\u00e9m prost\u0159ed\u00ed, ide\u00e1ln\u011b v rozmez\u00ed 15 \u00b0C a\u017e 25 \u00b0C, aby se proces degradace zpomalil. Vysok\u00e9 teploty urychluj\u00ed rychlost chemick\u00fdch reakc\u00ed, zvy\u0161uj\u00ed samovyb\u00edjen\u00ed a tvorbu vrstvy SEI, \u010d\u00edm\u017e urychluj\u00ed st\u00e1rnut\u00ed bateri\u00ed.<\/p>

\u00a0Stav nabit\u00ed (SOC)<\/span><\/p>

Udr\u017eov\u00e1n\u00ed \u010d\u00e1ste\u010dn\u00e9 hodnoty SOC (p\u0159ibli\u017en\u011b 30-50%) b\u011bhem skladov\u00e1n\u00ed minimalizuje nam\u00e1h\u00e1n\u00ed elektrod a sni\u017euje rychlost samovyb\u00edjen\u00ed, \u010d\u00edm\u017e prodlu\u017euje \u017eivotnost baterie. Vysok\u00e1 i n\u00edzk\u00e1 \u00farove\u0148 SOC zvy\u0161uje nam\u00e1h\u00e1n\u00ed materi\u00e1lu elektrody, co\u017e vede ke struktur\u00e1ln\u00edm zm\u011bn\u00e1m a v\u011bt\u0161\u00edmu po\u010dtu vedlej\u0161\u00edch reakc\u00ed. \u010c\u00e1ste\u010dn\u00e9 SOC vyrovn\u00e1v\u00e1 nap\u011bt\u00ed a reak\u010dn\u00ed aktivitu, \u010d\u00edm\u017e zpomaluje rychlost degradace.<\/p>

\u00a0Hloubka vypou\u0161t\u011bn\u00ed (DOD)<\/span><\/p>

Baterie vystaven\u00e9 hlubok\u00e9mu vyb\u00edjen\u00ed (vysok\u00fd DOD) degraduj\u00ed rychleji ne\u017e baterie vystaven\u00e9 m\u011blk\u00e9mu vyb\u00edjen\u00ed. Hlubok\u00e9 v\u00fdboje zp\u016fsobuj\u00ed v\u00fdrazn\u011bj\u0161\u00ed struktur\u00e1ln\u00ed zm\u011bny v elektrodov\u00fdch materi\u00e1lech, vytv\u00e1\u0159ej\u00ed v\u00edce trhlin a produkt\u016f vedlej\u0161\u00edch reakc\u00ed, a t\u00edm zvy\u0161uj\u00ed rychlost degradace. Zamezen\u00ed \u00fapln\u00e9mu vybit\u00ed bateri\u00ed b\u011bhem skladov\u00e1n\u00ed pom\u00e1h\u00e1 tento efekt zm\u00edrnit a prodlu\u017euje \u017eivotnost bateri\u00ed.<\/p>

\u00a0Kalend\u00e1\u0159n\u00ed v\u011bk<\/span><\/p>

Baterie \u010dasem p\u0159irozen\u011b degraduj\u00ed v d\u016fsledku p\u0159irozen\u00fdch chemick\u00fdch a fyzik\u00e1ln\u00edch proces\u016f. I za optim\u00e1ln\u00edch skladovac\u00edch podm\u00ednek se chemick\u00e9 slo\u017eky baterie postupn\u011b rozkl\u00e1daj\u00ed a selh\u00e1vaj\u00ed. Spr\u00e1vn\u00e9 skladovac\u00ed postupy mohou tento proces st\u00e1rnut\u00ed zpomalit, ale nemohou mu zcela zabr\u00e1nit.<\/p>

\u00a0<\/p>

Techniky anal\u00fdzy degradace:<\/h2>

M\u011b\u0159en\u00ed sl\u00e1bnouc\u00ed kapacity<\/h3>

Pravideln\u00e9 m\u011b\u0159en\u00ed vyb\u00edjec\u00ed kapacity baterie umo\u017e\u0148uje jednodu\u0161e sledovat jej\u00ed degradaci v pr\u016fb\u011bhu \u010dasu. Srovn\u00e1n\u00ed kapacity baterie v r\u016fzn\u00fdch obdob\u00edch umo\u017e\u0148uje posoudit rychlost a rozsah jej\u00ed degradace, co\u017e umo\u017e\u0148uje v\u010dasn\u00e9 proveden\u00ed \u00fadr\u017eby.<\/p>

\u00a0Elektrochemick\u00e1 impedan\u010dn\u00ed spektroskopie (EIS)<\/span><\/p>

Tato technika analyzuje vnit\u0159n\u00ed odpor baterie a poskytuje podrobn\u00fd p\u0159ehled o zm\u011bn\u00e1ch vlastnost\u00ed elektrod a elektrolytu. EIS m\u016f\u017ee odhalit zm\u011bny vnit\u0159n\u00ed impedance baterie a pomoci tak identifikovat konkr\u00e9tn\u00ed p\u0159\u00ed\u010diny degradace, jako je nap\u0159\u00edklad zes\u00edlen\u00ed vrstvy SEI nebo zhor\u0161en\u00ed stavu elektrolytu.<\/p>

\u00a0Posmrtn\u00e1 anal\u00fdza<\/span><\/p>

Rozebr\u00e1n\u00ed degradovan\u00e9 baterie a anal\u00fdza elektrod a elektrolytu pomoc\u00ed metod, jako je rentgenov\u00e1 difrakce (XRD) a skenovac\u00ed elektronov\u00e1 mikroskopie (SEM), m\u016f\u017ee odhalit fyzik\u00e1ln\u00ed a chemick\u00e9 zm\u011bny, ke kter\u00fdm doch\u00e1z\u00ed b\u011bhem skladov\u00e1n\u00ed. Posmrtn\u00e1 anal\u00fdza poskytuje podrobn\u00e9 informace o struktur\u00e1ln\u00edch zm\u011bn\u00e1ch a zm\u011bn\u00e1ch slo\u017een\u00ed v baterii, co\u017e napom\u00e1h\u00e1 pochopen\u00ed mechanism\u016f degradace a zlep\u0161en\u00ed konstrukce a strategi\u00ed \u00fadr\u017eby bateri\u00ed.<\/p>

\u00a0<\/p>

Strategie zm\u00edrn\u011bn\u00ed dopad\u016f<\/h2>

Chladn\u00e9 \u00falo\u017ei\u0161t\u011b<\/h3>

Baterie skladujte v chladn\u00e9m a kontrolovan\u00e9m prost\u0159ed\u00ed, abyste minimalizovali samovyb\u00edjen\u00ed a dal\u0161\u00ed degrada\u010dn\u00ed mechanismy z\u00e1visl\u00e9 na teplot\u011b. V ide\u00e1ln\u00edm p\u0159\u00edpad\u011b udr\u017eujte teplotu v rozmez\u00ed 15 \u00b0C a\u017e 25 \u00b0C. Pou\u017eit\u00ed speci\u00e1ln\u00edho chladic\u00edho za\u0159\u00edzen\u00ed a syst\u00e9m\u016f kontroly prost\u0159ed\u00ed m\u016f\u017ee v\u00fdrazn\u011b zpomalit proces st\u00e1rnut\u00ed bateri\u00ed.<\/p>

\u010c\u00e1ste\u010dn\u00e9 ulo\u017een\u00ed n\u00e1lo\u017ee<\/h3>

B\u011bhem skladov\u00e1n\u00ed udr\u017eujte \u010d\u00e1ste\u010dnou hodnotu SOC (p\u0159ibli\u017en\u011b 30-50%), abyste sn\u00ed\u017eili nam\u00e1h\u00e1n\u00ed elektrod a zpomalili jejich degradaci. To vy\u017eaduje nastaven\u00ed vhodn\u00fdch strategi\u00ed nab\u00edjen\u00ed v syst\u00e9mu \u0159\u00edzen\u00ed baterie, aby se zajistilo, \u017ee baterie z\u016fstane v optim\u00e1ln\u00edm rozsahu SOC.<\/p>

Pravideln\u00e9 sledov\u00e1n\u00ed<\/h3>

Pravideln\u011b sledujte kapacitu a nap\u011bt\u00ed baterie, abyste zjistili degrada\u010dn\u00ed trendy. Na z\u00e1klad\u011b t\u011bchto pozorov\u00e1n\u00ed prov\u00e1d\u011bjte podle pot\u0159eby n\u00e1pravn\u00e1 opat\u0159en\u00ed. Pravideln\u00e9 monitorov\u00e1n\u00ed m\u016f\u017ee tak\u00e9 poskytnout v\u010dasn\u00e9 varov\u00e1n\u00ed p\u0159ed potenci\u00e1ln\u00edmi probl\u00e9my a zabr\u00e1nit tak n\u00e1hl\u00e9mu selh\u00e1n\u00ed baterie b\u011bhem pou\u017e\u00edv\u00e1n\u00ed.<\/p>

Syst\u00e9my spr\u00e1vy bateri\u00ed (BMS)<\/h3>

Vyu\u017eijte BMS k monitorov\u00e1n\u00ed stavu baterie, \u0159\u00edzen\u00ed cykl\u016f nab\u00edjen\u00ed a vyb\u00edjen\u00ed a implementaci funkc\u00ed, jako je vyva\u017eov\u00e1n\u00ed \u010dl\u00e1nk\u016f a regulace teploty b\u011bhem skladov\u00e1n\u00ed. Syst\u00e9m BMS dok\u00e1\u017ee zji\u0161\u0165ovat stav baterie v re\u00e1ln\u00e9m \u010dase a automaticky upravovat provozn\u00ed parametry pro prodlou\u017een\u00ed \u017eivotnosti baterie a zv\u00fd\u0161en\u00ed bezpe\u010dnosti.<\/p>

\u00a0<\/p>

Z\u00e1v\u011br<\/h2>

Komplexn\u00edm pochopen\u00edm mechanism\u016f degradace, ovliv\u0148uj\u00edc\u00edch faktor\u016f a zaveden\u00edm \u00fa\u010dinn\u00fdch strategi\u00ed pro jej\u00ed zm\u00edrn\u011bn\u00ed m\u016f\u017eete v\u00fdrazn\u011b zlep\u0161it spr\u00e1vu dlouhodob\u00e9ho skladov\u00e1n\u00ed komer\u010dn\u00edch lithium-iontov\u00fdch bateri\u00ed. Tento p\u0159\u00edstup umo\u017e\u0148uje optim\u00e1ln\u00ed vyu\u017eit\u00ed bateri\u00ed a prodlu\u017euje jejich celkovou \u017eivotnost, \u010d\u00edm\u017e zaji\u0161\u0165uje lep\u0161\u00ed v\u00fdkonnost a n\u00e1kladovou efektivitu v pr\u016fmyslov\u00fdch aplikac\u00edch. Chcete-li z\u00edskat pokro\u010dilej\u0161\u00ed \u0159e\u0161en\u00ed pro ukl\u00e1d\u00e1n\u00ed energie, zva\u017ete\u00a0Syst\u00e9m skladov\u00e1n\u00ed energie pro komer\u010dn\u00ed a pr\u016fmyslov\u00e9 \u00fa\u010dely s kapacitou 215 kWh<\/a>\u00a0podle\u00a0Kamada Power<\/a><\/strong>.<\/p>

\u00a0<\/p>

Kontakt Kamada Power<\/h2>

Z\u00edskat\u00a0Komer\u010dn\u00ed a pr\u016fmyslov\u00e9 syst\u00e9my skladov\u00e1n\u00ed energie na m\u00edru<\/a><\/strong>\u00a0, pros\u00edm, klikn\u011bte\u00a0Kontaktujte n\u00e1s Kamada Power<\/a><\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Anal\u00fdza degradace komer\u010dn\u00edch lithium-iontov\u00fdch bateri\u00ed p\u0159i dlouhodob\u00e9m skladov\u00e1n\u00ed. Lithium-iontov\u00e9 baterie se staly nepostradateln\u00fdmi v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch d\u00edky sv\u00e9 vysok\u00e9 energetick\u00e9 hustot\u011b a \u00fa\u010dinnosti. Jejich v\u00fdkon se v\u0161ak v pr\u016fb\u011bhu \u010dasu zhor\u0161uje, zejm\u00e9na p\u0159i del\u0161\u00edm skladov\u00e1n\u00ed. Pochopen\u00ed mechanism\u016f a faktor\u016f ovliv\u0148uj\u00edc\u00edch tuto degradaci je z\u00e1sadn\u00ed pro optimalizaci \u017eivotnosti bateri\u00ed a maximalizaci jejich \u00fa\u010dinnosti. Tento \u010dl\u00e1nek...<\/p>","protected":false},"author":1,"featured_media":949,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_lock_modified_date":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[26],"tags":[],"class_list":["post-2909","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/posts\/2909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/comments?post=2909"}],"version-history":[{"count":7,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/posts\/2909\/revisions"}],"predecessor-version":[{"id":2921,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/posts\/2909\/revisions\/2921"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/media\/949"}],"wp:attachment":[{"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/media?parent=2909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/categories?post=2909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kmdpower.com\/cs\/wp-json\/wp\/v2\/tags?post=2909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}