Kev nkag siab qhov sib txawv ntawm kev tiv thaiv sab hauv thiab impedance yog qhov tseem ceeb rau txhua tus neeg ua haujlwm nrog UPS roj teeb, BMS systems, lossis hluav taws xob hluav taws xob. Thaum feem ntau siv sib hloov, lawv sawv cev rau cov khoom siv hluav taws xob sib txawv - ib qho rau DC circuits, lwm qhov rau AC. Phau ntawv qhia no muab qhov tseeb, kev sib piv nrog cov txiaj ntsig zoo rau kev saib xyuas roj teeb.
Internal resistance yog qhov kev tawm tsam rau tam sim no ntws hauv lub roj teeb thaum siv tam sim no (DC) ncaj qha. Nws tshwm sim los ntawm kev tsis kam ntawm electrolyte, electrodes, thiab kev sib txuas sab hauv. Internal resistance yog tus lej tiag (piv txwv li, 5.3 mΩ) thiab tsis hloov nrog zaus. Nws yog ib qho tseem ceeb tshaj plaws qhia txog roj teeb kev noj qab haus huv - ib qho kev nce hauv kev tiv thaiv sab hauv feem ntau qhia txog sulfation, kab sib chaws corrosion, los yog tsis muaj peev xwm.
Impedance yog tag nrho kev tawm tsam rau alternating tam sim no (AC) hauv ib lub voj voog. Nws suav nrog ob qho tib si tsis kam (qhov tseeb) thiab reactance (qhov xav txog, los ntawm capacitance thiab inductance). Impedance yog zaus-dependant thiab qhia raws li tus lej complex (R + jX). Hauv kev saib xyuas roj teeb, AC impedance ntsuas yog siv los ntsuas cov yam ntxwv sab hauv yam tsis tau tso lub roj teeb.
Table 1: Qhov sib txawv tseem ceeb ntawm kev tiv thaiv sab hauv (DC) thiab impedance (AC) hauv hluav taws xob engineering.
| Yam ntxwv ntawm Hluav Taws Xob Hluav Taws Xob | Internal Resistance (R) | Impedance (Z) |
|---|---|---|
| Daim ntawv thov Circuit Court | Siv feem ntau hauv circuits ua haujlwm ntawm direct tam sim no (DC). | Feem ntau ua hauj lwm hauv circuits tsim rau alternating tam sim no (AC). |
| Circuit Court muaj | Observable nyob rau hauv ob qho tib si alternating tam sim no (AC) thiab ncaj tam sim no (DC) circuits. | Tshwj xeeb rau alternating tam sim no (AC) circuits, tsis muaj nyob rau hauv DC. |
| Keeb kwm | Originates los ntawm cov khoom uas cuam tshuam qhov ntws ntawm hluav taws xob tam sim no. | Qhov tshwm sim los ntawm kev sib xyaw ua ke ntawm cov ntsiab lus uas tiv taus thiab ua rau cov hluav taws xob tam sim no. |
| Tus lej nthuav qhia | Qhia siv tus lej tiag tiag, piv txwv li, 5.3 mΩ. | Qhia tawm los ntawm ob qho tib si cov lej tiag tiag thiab cov kev xav hauv kev xav, ua piv txwv los ntawm R + jX. |
| Zaus Dependence | Nws tus nqi tseem nyob tas li tsis hais qhov zaus ntawm DC tam sim no. | Nws tus nqi hloov pauv nrog qhov hloov pauv ntawm AC tam sim no. |
| Cov yam ntxwv theem | Tsis pom muaj lub kaum sab xis lossis qhov loj me. | Characterized los ntawm ob qho tag nrho cov theem kaum sab xis thiab qhov loj. |
| Cwj pwm hauv Electromagnetic Field | Tsuas yog ua pov thawj lub zog dissipation thaum raug rau ib qho chaw electromagnetic. | Ua kom pom ob lub zog dissipation thiab lub peev xwm khaws cia lub zog hauv electromagnetic teb. |
Nyob rau hauv niaj hnub Battery Management Systems (BMS), ob qho tib si sab hauv thiab impedance raug saib xyuas los tsim kom tiav daim duab ntawm roj teeb kev noj qab haus huv. Kev nce hauv kev tiv thaiv yog ib qho kev ceeb toom ntxov ntawm kev degradation, thaum impedance spectroscopy tuaj yeem qhia cov kev hloov hauv tshuaj. DFUN BMS siv precision AC ntsuas txoj hauv kev los taug qab cov kev tiv thaiv sab hauv thiab xyuas qhov tsis txaus ntseeg ua ntej lawv ua rau tsis ua haujlwm.
DFUN's BMS siv lub zog AC tam sim no rau txhua lub roj teeb ntawm tes thiab ntsuas qhov tshwm sim qhov hluav taws xob poob. Kev tiv thaiv sab hauv yog suav nrog Ohm txoj cai, nrog qhov tseeb ntawm ± 1-2%. Txoj kev no tsis yog-invasive, tsis tas yuav disconnect lub roj teeb, thiab muab cov ntaub ntawv real-time rau kev saib xyuas.
Internal resistance (R) yog DC cov cuab yeej uas tawm tsam tam sim no, thaum impedance (Z) yog AC cov cuab yeej uas suav nrog ob qho tib si tsis kam thiab reactance.
Kev nce hauv kev tiv thaiv yog ib qho ntawm cov cim qhia ntxov tshaj plaws ntawm cov roj teeb degradation, sulfation, thiab tsis muaj peev xwm.
DFUN BMS siv cov kev txhaj tshuaj AC tam sim no ruaj khov los ntsuas kev tiv thaiv sab hauv nrog 1-2% qhov tseeb, tsis muaj kev cuam tshuam cov roj teeb ua haujlwm.
