A cikin 'yan shekarun nan, rahotannin gobara har ma da fashewar batir lithium-ion sun zama ruwan dare. Batirin lithium-ion galibi sun ƙunshi kayan lantarki mara kyau, electrolyte da tabbataccen electrode. Ayyukan sinadarai na graphite abu mara kyau a cikin halin da ake cajin yana ɗan kama da lithium na ƙarfe. Fim ɗin SEI a saman zai rushe a babban zafin jiki, kuma ions lithium da aka saka a cikin graphite zai amsa tare da electrolyte da mai ɗaure polyvinylidene fluoride kuma a ƙarshe zai saki zafi mai yawa.

Alkyl carbonate Organic mafita ana amfani da su azaman electrolytes, waɗanda suke flammable. Madaidaicin kayan lantarki yawanci shine karfen oxide na canzawa, wanda yana da kaddarorin oxidizing mai ƙarfi a cikin yanayin da aka caje, kuma cikin sauƙi bazuwa don sakin iskar oxygen a babban zafin jiki. Oxygen da aka saki yana amsawa tare da electrolyte don oxidize, sannan ya fito da zafi mai yawa.

Hakazalika, baturin lithium ion zai kasance mara ƙarfi lokacin dumama tare da babban zafin jiki. Koyaya, menene ainihin zai faru idan muka ci gaba da dumama baturin? Anan mun gudanar da gwaji na gaske zuwa tantanin halitta NCM mai caji tare da ƙarfin lantarki na 3.7 V da ƙarfin 106 Ah.

Hanyoyin Gwaji:

1. A dakin da zafin jiki (25 ± 2 ℃), an fara fitar da kwayar tantanin halitta zuwa ƙananan iyakar ƙarfin lantarki tare da halin yanzu na 1C kuma ya bar minti 15. Sannan a yi amfani da 1C akai-akai don yin caji zuwa mafi girman iyaka kuma canza zuwa cajin wutar lantarki akai-akai, dakatar da caji lokacin da cajin yanzu ya ragu zuwa 0.05C, sannan a ajiye shi na mintuna 15 bayan caji;

2. Ƙara yawan zafin jiki daga zafin jiki zuwa 200 ° C a 5 ° C / min, kuma ajiye a 5 ° C kowace lita na minti 30;

Ƙarshe:

Kwayoyin lithium za su kama wuta a ƙarshe lokacin da zafin gwajin ya ci gaba da ƙaruwa. Daga tsarin da ke sama mun fara ganin buɗaɗɗen bututun da aka buɗe, ruwan ya fito; yayin da yanayin zafi ke ƙaruwa, fitar ruwa na biyu ya faru kuma ya fara konewa. Kwayoyin baturi sun kasa a kusa da 138°C, wanda ya riga ya yi sama da madaidaicin zafin gwajin gama gari na 130°C.