Dɛn ne lithium batere mu ahoɔden a ɛko tia?
Sɛ anyinam ahoɔden fa batere mu a, ehyia ahoɔden a ɛko tia, na ɛma batere no ahoɔden a ɛyɛ adwuma no so tew. Wɔfrɛ saa ahoɔden a ɛko tia yi batere no mu ahoɔden a ɛko tia. Esiane battery no mu ahoɔden a ɛko tia nti, terminal voltage no sua sen electromotive ahoɔden ne open-circuit voltage bere a ɛrepue. Bere a wɔrebɔ charge no, terminal voltage no korɔn sen electromotive force ne open-circuit voltage. Battery mu ahoɔden a ɛko tia yɛ ade a ɛho hia yiye wɔ nnuru ahoɔden fibea bi mu. Ɛka battery no adwumayɛ ahoɔden, adwumayɛ ahoɔden, ahoɔden a efi mu ba, ne ahoɔden tẽẽ. Wɔ nnuru ahoɔden fibea a mfaso wɔ so ho no, dodow a emu ahoɔden a ɛko tia no sua no, dodow no ara na eye.
Batere no mu ahoɔden a ɛko tia no nyɛ nea ɛkɔ so daa; ɛsono bere a ɛretu a egyina nneɛma a ɛyɛ adwuma no mu, electrolyte dodow, batere no hyew, ne bere a wɔde fi mu no so. Battery mu ahoɔden a ɛko tia no bi ne ohmic mu ahoɔden a ɛko tia (R) ne polarization mu a ɛko tia (Rf) a electrodes no da no adi wɔ electrochemical reactions mu. Sɛ wɔka abien yi nyinaa bom a, wɔfrɛ no battery no mu ahoɔden a ɛko tia nyinaa (Rw).
Ohmic mu resistance no titiriw yɛ emu resistance a electrode nneɛma, electrolyte, separator, ne contact resistance a ɛwɔ afã horow. Ɛne batere no kɛse, ne nhyehyɛe, ɔkwan a wɔfa so yɛ electrode (sɛ nhwɛso no, paste-type ne tubular electrodes a ɛwɔ lead-acid batere mu, ne box-type ne sintered electrodes a ɛwɔ alkaline batere mu), ne sɛnea wɔboaboa ano no mu den no wɔ abusuabɔ. Ohmic mu ahoɔden a ɛko tia no di Ohm mmara so.
Polarization mu resistance kyerɛ emu resistance a ɛnam polarization a ɛda electrode pa ne negative ntam wɔ nnuru ahoɔden fibea bi mu bere a electrochemical reaction no reyɛ no. Ɛyɛ ahoɔden a ɛko tia nneɛma a anyinam ahoɔden polarization ne concentration de ba no nyinaa bom
polarization a ɛyɛ polarization.
Polarization mu ahoɔden a ɛko tia no ne sɛnea nneɛma a ɛyɛ adwuma no te, electrode nhyehyɛe, ne batere a wɔyɛ no wɔ abusuabɔ, titiriw no ɛne battery no adwumayɛ tebea wɔ abusuabɔ kɛse; discharge current ne temperature nya nkɛntɛnso kɛse. Wɔ current density discharge a ɛkorɔn mu no, electrochemical polarization ne concentration polarization nyinaa kɔ soro, na ebetumi mpo ama electrode a enye no ayɛ passivation, na ɛnam so ama polarization mu resistance akɔ soro. Ɔhyew a ɛba fam nya electrochemical polarization ne ion diffusion so nkɛntɛnso bɔne; enti, battery no polarization mu resistance nso kɔ soro wɔ low-temperature tebea horow mu. Enti, polarization resistance no nyɛ daa, na mmom ɛsakra ne discharge rate, ɔhyew ne tebea afoforo.
Analytical expression a ɛfa battery mu ahoɔden a ɛko tia ho no te sɛ nea edidi so yi:
Wɔ fomula no mu no, bE (iₐ,τ,C) Iₐ−1-Battery polarization mu ahoɔden a ɛko tia;
b-Nsakraeɛ a ɛba battery terminal voltage mu a ɛfa battery terminal voltage E ho wɔ rated capacity tebea mu berɛ a battery no abɔ charge na wɔde current Iₐ agyae;
R2ₗ(τ,C)-Nneɛma a ɛko tia aduru no;
R2(C)-Electrode a ɛko tia. Electrolyte a ɛko tia R1ₗ ne electrode a ɛko tia R2 no ne battery no tumi a ɛwɔ hɔ ntɛm ara no hyia wɔ ɔkwan a ɛne no bɔ abira so;
iₐ, τ, C-Battery charge ne dischargeing mprempren, ɔhyew, ne tumi tebea saa bere no.
Batere no mu ahoɔden a ɛko tia no sua koraa na ɛtaa yɛ nea wontumi mmu ani ngu so wɔ adwumayɛ tebea horow pii mu. Nanso, ahoɔden batere a wɔde yɛ kar a anyinam ahoɔden wom no taa yɛ adwuma wɔ ahoɔden a ɛkɔ soro ne tebea a emu dɔ mu, na ɛma ahoɔden a ɛwɔ mu no so tew kɛse esiane emu ahoɔden a ɛko tia nti. Wɔ eyi mu no, wontumi mmu ani ngu nkɛntɛnso a emu resistance nya wɔ ɔmansin no nyinaa so no so.
