Kodi chingachitike ndi chiyani ngati kutentha kwa batriamu kuli kosalekeza?

M'zaka zaposachedwa, malipoti amoto komanso kuphulika komwe kumayambitsidwa ndi mabatire a lithiamu-ion kumakhala kofala. Mabatire a lifiyamu-ion amapangidwa ndi ma elekitirodi oyipa, maelekitirodi ndi zinthu zabwino zama elekitirodi. Zochitika zamankhwala zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi ndizofanana ndi lithiamu yachitsulo. Kanema wa SEI pamwambapa amatha kuwola ndikutentha kwambiri, ndipo ma ion a ma lithiamu ophatikizidwa mu graphite angayanjane ndi electrolyte ndi binder polyvinylidene fluoride ndipo pamapeto pake amatulutsa kutentha kwakukulu.

Alkyl carbonate organic mayankho amagwiritsidwa ntchito ngati ma electrolyte, omwe amatha kuyaka. Zinthu zabwino zamagetsi nthawi zambiri zimakhala zosintha zazitsulo zosakaniza, zomwe zimakhala ndi ma oxidizing olimba mdziko lomwe ladzudzulidwa, ndipo zimawonongeka mosavuta kuti zitulutse mpweya kutentha kwambiri. Mpweya wotulutsidwawu umagwira ndi electrolyte kuti uthandize, kenako umatuluka kutentha kwakukulu.

Momwemonso, batri ya lithiamu ion imakhala yosakhazikika ikatenthetsa ndi kutentha kwambiri. Komabe, kodi ndi chiyani kwenikweni chomwe chingachitike ngati titha kutentha batiri? Apa tidayesa kuyesa kwenikweni ku cell ya NCM yodzaza ndi magetsi a 3.7 V ndi mphamvu ya 106 Ah.

Njira Zoyesera

1.Kutentha kwapakati (25 ± 2 ℃), khungu limodzi limatulutsidwa kumunsi kwa mphamvu yamagetsi ndi 1C yamakono ndikusiya mphindi 15. Kenako gwiritsani ntchito 1C pafupipafupi pakali pano kuti mulipire kumtunda wamagetsi osinthira ndikusinthira kuyimitsa kwamagetsi kosalekeza, siyani kulipiritsa pomwe kutsitsa kwatsiku kukutsikira ku 0.05C, ndikuyiyika pambali kwa mphindi 15 mutangotsitsa;

2. Onjezerani kutentha kuchokera kutentha mpaka 200 ° C pa 5 ° C / min, ndikusunga 5 ° C pa lita imodzi kwa mphindi 30;

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Pomaliza:

Maselo a lithiamu pamapeto pake azigwira moto kutentha kwa mayeso kumakulirakulira. Kuchokera pazomwe tafotokozazi timayamba kuwona valavu yotulutsa kutsegulidwa, madzi atulutsidwa; kutentha kukamakulira, kutulutsa kwamadzi kwachiwiri kudachitika ndikuyamba kuyaka. Maselo a batri adalephera mozungulira 138 ° C, omwe anali atakwera kale kuposa kutentha wamba kwa 130 ° C.

 


Post nthawi: Jan-27-2021