Chii chinokonzera lithium battery capacity?

Автор: Iflowpower – Портативті электр станциясының жеткізушісі

Sekureva kwemishumo, simba rekuburitsa reti lithium-ion bhatiri rinongoita 31.5% patembiricha yepakamuri pa -20 ¡ã C. Traditional lithium-ion bhatiri kushanda tembiricha pakati -20 ~ + 55 ¡ã C.

Asi muchikamu chemuchadenga, mota dzemagetsi, dzinoda kuti bhatiri rishande zvakanaka pa -40 ¡ã C. Naizvozvo, zvakakosha zvikuru kuvandudza yakadzika tembiricha zvivakwa zve lithium ion mabhatiri. Munzvimbo dzakaderera tembiricha, viscosity ye electrolyte inowedzera, kunyange zvishoma kusimba, zvichiita kuti yakaderera-conductivity ye lithium ion bhatiri.

Kugarisana pakati pe electrolyte neiyo negative electrode uye diaphragm kunodzikira munzvimbo yakaderera tembiricha. Iyo negative electrode yerithium ion bhatiri pasi pemamiriro ekushisa yakaderera yakanaya zvakanyanya, uye simbi yakanyungudutswa yelithium yakabatwa ne electrolyte, uye kuiswa kwechigadzirwa kwakakonzera kune yakasimba electrolyte interface (SEI) ukobvu. Lithium-ion mabhatiri pasi peyakadzika tembiricha nharaunda inoderedza iyo yemukati diffusion system yezvinhu inoshanda, iyo charge transfer impedance (RCT) inowedzera zvakanyanya.

Maonero enyanzvi 1: Electrolyne mhinduro inokanganisa kuderera kwekushisa kwe lithium ion mabhatiri, kuumbwa uye zvinhu zvemagetsi zve electrolyte zvine mhedzisiro yakaipa pabhatiri yakaderera tembiricha kuita. Dambudziko riri pamusoro pebhatiri nderokuti: viscosity ye electrolyte ichava yakakura, iyo ion conductivity inononoka, zvichiita kuti maerekitironi afambe nokukurumidza yedunhu rekunze, saka bhatiri rave rakanyanyisa polarized, uye simba rekuchajisa uye kuburitsa rine kuderera kwakanyanya. Kunyanya kana yakaderera-tembiricha kuchaja, lithium ions inogona nyore kugadzira lithium delegranes pamusoro peiyo negative electrode, zvichikonzera kutadza kwebhatiri.

Iko kuderera kwekushisa kwe electrolyte kwakanyatsoenderana nehukuru hwe electrolyte pachayo conductivity, iyo ion yekufambisa yemagetsi conductivity inokurumidza, uye huwandu hwehuwandu hunogona kuiswa pakudziya kwakaderera. Iyo yakawanda lithium munyu mu electrolyte, iyo yakawanda nhamba yevanotama, inowedzera conductivity. High magetsi conductivity, kukurumidza ion conductivity, duku polarization, zviri nani kushanda kwebhatiri pakudzika kwakadzika.

Naizvozvo, yakakwirira conductivity ndiyo inodiwa mamiriro ekuwana yakanaka yakaderera tembiricha kuita kwe lithium ion mabhatiri. Iko kushandiswa kwemagetsi kwe electrolyte kwakabatana nekuumbwa kwe electrolyte, uye viscosity ye solvent ndeyekuvandudza nzira ye electrolyte magetsi ekugadzirisa. Iyo fluidity yekunyungudutsa yakanaka pakudziya kwakadzika kweiyo solvent ndiyo vimbiso yekutakura ion, uye iyo yakasimba electrolyte membrane yakaumbwa ne electrolyte mumhepo yakadzika tembiricha zvakare kiyi yekukanganisa lithium ion conductance, uye RSEI isimba rakasimba re lithium ion bhatiri munzvimbo yakaderera tembiricha.

Nyanzvi 2: Kuravira zvinhu kudzikamisa tembiricha kuita kwe lithium ion mabhatiri tembiricha yakaderera, nyowani Li + diffusion impedance, asi kwete SEI firimu. Iyo yakaturikidzana chimiro ine ese-imwe-dimensional lithium-ion diffusion chiteshi, ine matatu-dimensional chiteshi chimiro kugadzikana, uye ndiyo yekutanga yekutengesa lithium ion bhatiri yakanaka zvinhu. Izvo zvinomiririra zvinhu zvinosanganisira LiCoO2, Li (CO1-XNIX) O2 uye Li (Ni, Co, Mn) O2, e.