M'zaka zaposachedwa, malipoti a moto komanso kuphulika komwe kumachitika chifukwa cha mabatire a lithiamu-ion ndizofala.Mabatire a lithiamu-ion amapangidwa makamaka ndi zinthu zopanda electrode, electrolyte ndi zinthu zabwino za electrode. The mankhwala ntchito ya negative elekitirodi chuma graphite mu mlandu boma ndi pang'ono ngati zitsulo lithiamu. The SEI filimu pamwamba akanatha kuwola pa kutentha kwambiri, ndi ayoni lifiyamu ophatikizidwa graphite anachita ndi electrolyte ndi binder polyvinylidene fluoride ndipo potsiriza kumasula kwambiri kutentha.

Alkyl carbonate organic solutions amagwiritsidwa ntchito ngati ma electrolyte, omwe amatha kuyaka. The zabwino elekitirodi zakuthupi kawirikawiri kusintha zitsulo okusayidi, amene ali amphamvu oxidizing katundu mu mlandu boma, ndipo mosavuta kuwola kumasula mpweya kutentha kwambiri. Mpweya wotulutsidwa umakhudzidwa ndi electrolyte kuti ukhale ndi okosijeni, kenako umatuluka kutentha kwambiri.

Apperately, batire ya lithiamu ion ingakhale yosakhazikika ikatenthedwa ndi kutentha kwakukulu. Komabe, nchiyani kwenikweni chingachitike ngati tipitirizabe kutenthetsa batire? Apa tidayesa kwenikweni ku cell ya NCM yokhala ndi magetsi a 3.7 V ndi mphamvu ya 106 Ah.

Njira Zoyesera:

1. Pa kutentha kwapakati (25 ± 2 ℃), selo imodzi imatulutsidwa koyamba kumalo otsika malire ndi magetsi a 1C ndikusiya kwa mphindi 15. Kenako gwiritsani ntchito 1C nthawi zonse kuti mupereke voteji yotsika kwambiri ndikusinthira ku charging chanthawi zonse, siyani kuyitanitsa pomwe magetsi akutsika mpaka 0.05C, ndikuyiyika pambali kwa mphindi 15 mutatha kulipiritsa;

2. Wonjezerani kutentha kwa kutentha kufika 200 ° C pa 5 ° C / min, ndi kusunga 5 ° C pa lita imodzi kwa mphindi 30;

Pomaliza:

Ma cell a lithiamu amatha kugwira moto pamene kutentha kwa mayeso kumawonjezeka mosalekeza. Kuchokera pamwamba pa ndondomekoyi timayamba kuona valve yotulutsa mpweya itatsegulidwa, madzi amachotsedwa; pamene kutentha kumakwera kwambiri, kutulutsa kwamadzi kwachiwiri kunachitika ndikuyamba kuyaka. Ma cell a batri adalephera pafupifupi 138 ° C, omwe anali atakwera kale kuposa kutentha kwanthawi zonse kwa 130 ° C.