Dziko lolimbaotsika kutentha mabatire a lithiamukuwonetsa magwiridwe antchito a electrochemical otsika pa kutentha kochepa. Lithiamu-ion batire kulitcha pa kutentha pang'ono kumapangitsa kutentha kwa ma elekitirodi abwino ndi oyipa, zomwe zimapangitsa kuti ma elekitirodi azitentha kwambiri. Chifukwa cha kusakhazikika kwa ma elekitirodi abwino ndi oipa pa kutentha kochepa, n'zosavuta kuchititsa kuti electrolyte reaction ipange mpweya wa mpweya ndi mpweya wa lithiamu, motero kuwononga electrochemical performance. Choncho, kutentha otsika ndi njira yosapeŵeka mu ukalamba ndondomeko batire.
Kutentha kwa batire la lithiamu-ion ndikotsika kwambiri pakutentha kotsika, komwe kungawononge ma elekitirodi abwino komanso oyipa. Pamene kutentha kwa batire kuli kochepa kuposa kutentha kwa chipinda, electrode yabwino ya batire imakhudzidwa ndikuwola, ndipo mpweya ndi kutentha komwe kumapangidwa kumaunjikana mu mpweya wopangidwa mu electrode yabwino, zomwe zimapangitsa kuti selo likule. Ngati kutentha kuli kotsika kwambiri pakutulutsa, mitengoyo imakhala yosakhazikika. Kuti mupitirize kugwira ntchito ya electrode yolakwika ndi electrode yabwino, batire iyenera kuimbidwa mosalekeza, chifukwa chake, zinthu zabwino za electrode zogwira ntchito ziyenera kusungidwa pamalo ena momwe zingathere polipira.
Kuchuluka kwa batire kumawola mwachangu pakamayenda pang'onopang'ono kutentha ndipo kumakhudza kwambiri moyo wa batri. Kutsika kwa kutentha kwapansi kumabweretsa kusintha kwakukulu kwa voliyumu mu ma electrode abwino ndi oipa, zomwe zimapangitsa kuti pakhale ma lithiamu dendrites ndipo motero zimakhudza ntchito ya batri. Kutayika kwa mphamvu ndi kuwonongeka kwa mphamvu panthawi yoyendetsa / kutulutsa kukhetsa ndi chinthu chachikulu chomwe chimakhudza moyo wa batri, ndipo kuwonongeka kwa LiCoSiO 2 cathode ndi LiCoSiO 2 cathode pa kutentha kwakukulu kumapanga mpweya ndi thovu limodzi ndi electrolyte yolimba, yomwe imakhudza moyo wa batri. Momwe ma elekitirodi abwino ndi oyipa okhala ndi electrolyte pa kutentha pang'ono kumatulutsa thovu lomwe limasokoneza ma elekitirodi abwino ndi oyipa panthawi ya batire, zomwe zimapangitsa kuti mphamvu ya batri iwonongeke mwachangu.
Kukula kwa moyo wozungulira kumadalira momwe batire yatulutsira komanso kuchuluka kwa lithiamu ion panthawi yolipira. Mkulu wa lithiamu ion ndende idzalepheretsa kuyendetsa njinga kwa batri, pamene ndende ya lithiamu yotsika idzalepheretsa kuyendetsa njinga ya batri. Monga kulipiritsa pa kutentha kochepa kumapangitsa kuti ma electrolyte achite mwachiwawa, motero zimakhudza momwe ma elekitirodi abwino ndi oipa amachitira, zomwe zingayambitse kugwirizana pakati pa zinthu zabwino ndi zoipa zomwe zimagwira ntchito zomwe zimachititsa kuti ma electrode asokonezeke ndi kupanga mpweya wambiri ndi mpweya. madzi, motero amawonjezera kutentha kwa batri. Pamene ndende ya lithiamu ion ndi yotsika kuposa 0,05%, moyo wozungulira ndi 2 nthawi / tsiku; pamene kulipiritsa panopa wa batire ndi apamwamba kuposa 0.2 A/C, dongosolo mkombero akhoza kukhala 8-10 nthawi/tsiku, pamene lifiyamu dendrite ndende ndi otsika kuposa 0.05%, dongosolo mkombero akhoza kukhala 6-7 nthawi/tsiku. .
Pa kutentha kochepa, kutayika kwa madzi kudzachitika mu electrode yolakwika ndi diaphragm ya batri ya Li-ion, zomwe zidzatsogolera kuchepa kwa kayendetsedwe ka kayendetsedwe kake ndi mphamvu ya batire; ndi polarization wa zinthu zabwino elekitirodi adzachititsanso Chimaona mapindikidwe wa zinthu zoipa elekitirodi, kuchititsa kusakhazikika lattice ndi mlandu kutengerapo chodabwitsa; Kutuluka kwa nthunzi, kusungunuka, kusungunuka, kutulutsa mpweya ndi mpweya wa electrolyte kumapangitsanso kuchepa kwa kayendedwe ka batire. M'mabatire a LFP, zinthu zogwira ntchito pamwamba pa batri zimachepa pang'onopang'ono pamene chiwerengero cha malipiro ndi kutulutsa chikuwonjezeka, ndipo kuchepa kwa zinthu zogwira ntchito kungayambitse kuchepa kwa mphamvu ya batri; panthawi yamalipiro ndi kutulutsa, pamene chiwerengero cha malipiro ndi kutulutsa chikuwonjezeka, zinthu zogwira ntchito pa mawonekedwe zimagwirizanitsanso kukhala olimba komanso odalirika a batri, zomwe zimapangitsa kuti batire ikhale yolimba komanso yotetezeka.
Nthawi yotumiza: Nov-15-2022