Chii chinopikisa mukati mebhatiri ye lithium?
Kana yazvino ichiyerera nemukati mebhatiri, inosangana nekupikisa, zvichikonzera kudzikira kwemagetsi ebhatiri. Kuramba uku kunodaidzwa kuti bhatiri remukati mekudzivirira. Nekuda kwekuramba kuri kuita bhatiri mukati, theterminal voltage yakadzikira pane electromotive force uye inovhura-circuit voltage panguva yekubuda. Panguva yekuchaja, magetsi ekupedzisira anokwirira kudarika simba re electromotive uye anovhura-circuit voltage. Battery yemukati kuramba ndiyo inonyanya kukosha parameter yekemikari simba sosi. Inobata zvakananga simba rekushanda kwebhatiri, kushanda ikozvino, simba rinobuda, uye simba. Kune inoshanda kemikari simba sosi, iyo yakaderera iyo yemukati kuramba, zviri nani.
Battery mukati mekudzivirira haisi nguva dzose; inosiyana panguva yekubuda zvichienderana nekuumbwa kwezvinhu zvinoshanda, iyo electrolyte concentration, tembiricha yebhatiri, uye nguva yekubuda. Battery mukati mekudzivirira kunosanganisira ohmic mukati mekudzivirira (R₀) uye polarization mukati mekudzivirira (Rf) inoratidzwa nemagetsi panguva ye electrochemical reactions. Huwandu hwezviviri izvi hunonzi bhatiri's total internal resistance (Rw).
Ohmic yemukati inopikisa inonyanya kuumbwa nekupikiswa kwemukati kwezvinhu zve electrode, electrolyte, separator, uye kushomeka kwekubata kwezvikamu zvakasiyana. Zvinoenderana nekukura kwebhatiri, chimiro, nzira yekugadzira maelectrode (eg, paste-type uye tubular electrodes mulead{{4}mabhatiri easidhi, nebhokisi-mhando nemaelectrodhi akasiiwa mumabhatiri ealkaline), uye kusimba kwekubatanidza. Ohmic yemukati kuramba inoteerera mutemo weOhm.
Polarization internal resistance inoreva kupikisa kwemukati kunokonzerwa nepolarization pakati pezvakanaka uye zvisina kunaka maelectrodes emakemikari emagetsi panguva ye electrochemical reaction. Ndiwo huwandu hwekupokana kunokonzerwa ne electrochemical polarization uye kutarisisa
polarization.
Polarization yemukati inopikisa inoenderana nemhando yezvinhu zvinoshanda, chimiro che electrode, uye maitiro ekugadzira bhatiri, kunyanya yakabatana nemamiriro ekushanda kwebhatiri; discharge current uye tembiricha zvine zvazvinoita. Munguva yekubuda kwehuremu hwepamusoro, zvese zviri zviviri electrochemical polarization uye concentration polarization zvinowedzera, zvinogona kutokonzera kupasa kweiyo negative electrode, nokudaro kuwedzera polarization yemukati kuramba. Kupisa kwakadzika kunokanganisa zvakanyanya electrochemical polarization uye ion diffusion; saka, kudzika kwebhatiri mukati mekudzivirira kunowedzerawo pasi pe-tembiricha yakaderera. Naizvozvo, iyo polarization kuramba haisi nguva dzose, asi inoshanduka nechiyero chekubuda, tembiricha uye mamwe mamiriro.
Iyo analytical kutaura kwemukati kuramba kwebhatiri ndeiyi inotevera:
Mufomula, bE (iₐ,τ,C) Iₐ⁻¹-Battery polarization yemukati kuramba;
b-Iyo coefficient of variation yebhatiri terminal voltage inoenderana nebhatiri terminal voltage E under rated capacity conditions kana bhatiri rachajwa nekubuda neIₐ yazvino;
Rₑₗ(τ,C)-Kuramba kwe electrolyte;
Rₑ(C)-Electrode resistance. Electrolyte resistance Rₑₗ uye electrode resistance Rₑ zvinopesana nekusimba kwepakarepo kwebhatiri;
iₐ, τ, C-Kuchaja bhatiri nekuburitsa ikozvino, tembiricha, uye huwandu hwehuwandu panguva iyoyo.
Battery mukati mekudzivirira ishoma uye kazhinji inoregeredza pasi pemamiriro mazhinji ekushanda. Zvisinei, mabhatiri emagetsi emotokari dzemagetsi anowanzoshanda pasi pemamiriro ezvinhu epamusoro uye akadzika ekubuda, zvichiita kuti kudonha kukuru kwemagetsi kunokonzerwa nekupikisa kwemukati. Muchiitiko ichi, kukanganisa kwemukati kupikisa padunhu rose hakugoni kuregererwa.
