1. Txoj Kev Sawv Cev
Thaum thawj zaug qhib, muaj peb txoj hauv kev sawv (cov khoom lag luam yav tom ntej yuav tsis xav kom ua kom):
- Khawm ua kom sawv-up;
- Kev them nyiaj ua kom tsaug zog;
- Bluetooth khawm wake-up.
Rau kev siv hluav taws xob tom ntej, muaj rau 6 txoj hauv kev sawv:
- Khawm ua kom sawv-up;
- Charging activation wake-up (thaum lub charger lub input voltage tsawg kawg yog 2V siab tshaj lub roj teeb voltage);
- 485 kev sib txuas lus ua kom sawv;
- CAN kev sib txuas lus ua kom tsaug zog;
- Tshem tawm ua kom sawv (tam sim no ≥ 2A);
- Qhov tseem ceeb ua kom muaj zog.
2. BMS Pw tsaug zog hom
CovBMSnkag mus rau hom qis zog (lub sijhawm ua haujlwm yog 3600 vib nas this) thaum tsis muaj kev sib txuas lus, tsis muaj nqi / tawm tam sim no, thiab tsis muaj teeb liab sawv. Thaum lub sijhawm pw tsaug zog, kev them nyiaj thiab tso tawm MOSFET tseem txuas ntxiv tshwj tsis yog tias lub roj teeb tsis muaj hluav taws xob pom, thaum lub sijhawm MOSFETs yuav txiav tawm. Yog tias BMS pom cov cim kev sib txuas lus lossis kev them nqi / tso tawm tam sim no (≥2A, thiab rau kev them nyiaj ua haujlwm, lub charger lub input voltage yuav tsum yog tsawg kawg yog 2V siab tshaj lub roj teeb voltage, los yog muaj teeb liab sawv), nws yuav teb tam sim ntawd thiab nkag mus rau lub xeev wake-up ua hauj lwm.
3. SOC Calibration Strategy
Lub peev xwm tag nrho ntawm lub roj teeb thiab xxAH tau teeb tsa los ntawm lub tshuab computer. Thaum lub sij hawm them nyiaj, thaum lub xov tooj ntawm tes nce mus txog qhov siab tshaj tus nqi dhau thiab muaj kev them nqi tam sim no, SOC yuav raug ntsuas rau 100%. (Thaum lub sij hawm tso tawm, vim yog SOC xam yuam kev, SOC tej zaum yuav tsis yog 0% txawm tias thaum undervoltage tswb tej yam kev mob tshwm sim. Nco ntsoov: Lub tswv yim ntawm yuam SOC rau xoom tom qab cell overdischarge (undervoltage) tiv thaiv tuaj yeem kho.)
4. Fault Handling Strategy
Faults muab faib ua ob theem. BMS tuav ntau theem ntawm kev ua txhaum sib txawv:
- Theem 1: Cov teeb meem me me, BMS tsuas yog lub tswb.
- Qib 2: Kev ua txhaum loj heev, BMS tswb thiab txiav tawm MOS hloov.
Rau cov kev ua txhaum theem 2 hauv qab no, MOS hloov tsis raug txiav tawm: lub tswb ntsuas qhov sib txawv ntawm qhov sib txawv, qhov ntsuas kub ntau dhau, lub tswb siab SOC, thiab qis SOC tswb.
5. Sib npaug tswj
Passive ntsuas yog siv. CovBMS tswj kev tawm ntawm cov hluav taws xob ntau dualos ntawm resistors, dissipating lub zog raws li cua sov. Qhov ntsuas tam sim no yog 30mA. Kev sib npaug yog tshwm sim thaum tag nrho cov xwm txheej hauv qab no tau ntsib:
- Thaum them nyiaj;
- Lub ntsuas hluav taws xob ua kom muaj zog tau mus txog (settable ntawm tus tswv tsev computer); Qhov sib txawv ntawm cov hlwb> 50mV (50mV yog tus nqi qub, teeb tsa ntawm lub khoos phis tawj tswj hwm).
- Default activation voltage rau lithium hlau phosphate: 3.2V;
- Default activation voltage rau ternary lithium: 3.8V;
- Default activation voltage rau lithium titanate: 2.4V;
6. Kev kwv yees SOC
BMS kwv yees SOC siv txoj kev suav coulomb, khaws cov nqi lossis tso tawm los kwv yees lub roj teeb tus nqi SOC.
SOC Kev kwv yees yuam kev:
| Qhov tseeb | SOC Range |
|---|---|
| ≤ 10% | 0% < SOC < 100% |
7. Voltage, tam sim no, thiab kub qhov tseeb
| Muaj nuj nqi | Qhov tseeb | Chav tsev |
|---|---|---|
| Cell Voltage | ≤ 15% | mV |
| Tag nrho Voltage | ≤ 1% | V |
| Tam sim no | ≤ 3% FSR | A |
| Kub | ≤ 2 | °C |
8. Kev siv hluav taws xob
- Kev siv tus kheej tam sim no ntawm lub rooj tsav xwm kho vajtse thaum ua haujlwm: <500µA;
- Kev siv tus kheej tam sim no ntawm software board thaum ua haujlwm: <35mA (tsis muaj kev sib txuas lus sab nraud: <25mA);
- Kev siv tus kheej tam sim no hauv hom pw tsaug zog: <800µA.
9. Mos Hloov thiab Ntsiab Lus Hloov
- Lub default logic rau qhov muag hloov muaj nuj nqi yog inverse logic; nws tuaj yeem hloov kho rau qhov zoo logic.
- Lub neej ntawd ua haujlwm ntawm qhov hloov pauv tseem ceeb yog txhawm rau qhib BMS; lwm cov logic zog tuaj yeem kho.
Post lub sij hawm: Lub Xya hli ntuj-12-2024
