Lithium battery pakhat chhunga a chhunga resistance awm chu eng nge ni?
Battery chhunga current a kal chuan resistance a tawk a, chu chuan battery operating voltage a tihhniam phah a ni. He resistance hi battery chhunga resistance an ti a. Battery chhunga a resistance avang hian terminal voltage chu electromotive force aiin a hniam zawk a, discharge laiin circuit voltage a inhawng bawk. Charging lai hian terminal voltage chu electromotive force leh open-circuit voltage aiin a sang zawk. Battery chhunga resistance hi chemical power source parameter pawimawh tak a ni. Battery-a operating voltage, operating current, output energy leh power te chu direct-in a nghawng a ni. Practical chemical power source tan chuan a chhunga resistance a hniam chuan a tha zawk.
Battery chhunga resistance hi a awm reng lo; Discharge laiin active material composition, electrolyte concentration, battery temperature leh discharge hun a zirin a danglam thin. Battery internal resistance ah hian ohmic internal resistance (R2) leh electrochemical reaction laiin electrode ten an lantir polarization internal resistance (RF) te a huam a ni. Heng pahnih sum hi battery’s total internal resistance (RW) an ti a.
Ohmic internal resistance hi electrode materials, electrolyte, separator, leh component hrang hrang contact resistance te internal resistance atanga siam a ni ber. Battery lian tham, structure, electrode forming method (eg, lead-a paste-type leh tubular electrode paste leh tubular electrode te, leh box-type leh alkaline battery-a sintered electrode te nen a inzawm a, assembly tightness nen a inzawm bawk. Ohmic chhungril lama dodalna chuan Ohm-a dan a zawm.
Polarization internal resistance tih hian electrochemical reaction laiin chemical power source positive leh negative electrode inkara polarization avanga internal resistance awm chu a kawk a ni. Electrochemical polarization leh concentration avanga resistance awm zawng zawng zatve a ni.
Polarization a ni.
Polarization internal resistance hi active material awm dan, electrode structure, leh battery siamna process nen a inzawm a, a bik takin battery hnathawh dan nen a inzawm tlat a Discharge current leh temperature hian nghawng lian tak a nei a ni. Current density sang tak discharge lai hian electrochemical polarization leh concentration polarization pahnih a pung a, chu chuan negative electrode passivation a thlen thei a, chu chuan polarization internal resistance a tipung thei a ni. Temperature hniam chuan electrochemical polarization leh ion diffusion a nghawng tha lo hle a; Chuvangin, battery polarization internal resistance pawh low-temperature condition hnuaiah a pung bawk. Chuvangin, polarization resistance hi a awm reng lo va, discharge rate, temperature leh condition dang a zirin a danglam zawk a ni.
Battery chhunga resistance awm dan analytical expression chu hetiang hi a ni:
Formula-ah chuan (i3,τ,c) iₐ⁻1-Battery polarization chhungril lama dodalna;
b-Battery terminal voltage-a battery terminal voltage inthlak danglamna coefficient chu battery terminal voltage E nen khaikhin la, battery charge leh current I2 hmanga discharge a nih chuan
rₑₗ(τ,c)-Electrolyte-a thil thleng thei lo;
rₑ(c)-Electrode laka inven theihna. Electrolyte resistance R3 leh electrode resistance Rₑ chu battery-a instantaneous capacity nen inverse proportional a ni a;
I 2, τ, c-chutih lai chuan current, temperature, leh capacity state-a battery charging leh discharging.
Battery chhunga resistance hi a tlem hle a, operating condition tam takah chuan a tlem hle. Mahse, electric lirthei tan power battery te chu current sang tak leh deep discharge condition hnuaiah an thawk fo thin a, chu chuan internal resistance avanga voltage tlahniam nasa tak a thlen thin. Chutiang a nih chuan circuit pumpuiah internal resistance-in nghawng a neih dan chu ngaihthah theih a ni lo.
