1. Introduzione
This manual provides essential information for the safe and effective use of the DAOKAI 1S 3.7V 4A Lithium Battery Protection Board (BMS). This module is designed to protect single-cell 18650 lithium-ion batteries from common issues such as overcharge, overdischarge, short circuits, and overcurrent, ensuring the longevity and safety of your battery applications. Please read these instructions carefully before installation and operation.
2. Prodotto finitoview
The DAOKAI 1S 3.7V 4A BMS is a compact and efficient battery management system for single-cell lithium batteries. It integrates critical protection circuits to safeguard the battery during charging and discharging cycles. The board features DW01 and 8205A IC components for reliable performance.
Figura 2.1: Generale view of the DAOKAI 1S 3.7V 4A Lithium Battery Protection Board.
Figura 2.2: primo piano view of the protection board, highlighting its compact design and integrated components.
3. Caratteristiche principali
- Protezione da sovraccarico: Previene i danni alla batteria causati da un eccessivo volume di caricatage.
- Protezione da sovrascarica: Safeguards the battery from being discharged below a safe voltage livello.
- Protezione da cortocircuito: Interrompe automaticamente l'alimentazione in caso di cortocircuito.
- Protezione da sovracorrente: Limits the current draw to prevent damage to the battery and connected devices.
Figure 3.1: Visual representation of the integrated protection features.
4. Specifiche
| Parametro | Valore |
| Rilevamento sovraccarico Voltage | 4.25 ± 0.05 V |
| Vol. Rilascio Sovraccaricotage | 4.23 ± 0.05 V |
| Rilevamento sovrascarica Vol.tage | 2.45 ± 0.1 V |
| Corrente di scarica continua | 4 A (MASSIMO) |
| Overcurrent Detection Current | 5 A |
| Volume di caricatage | 4.2 Volt |
| Dimensioni (L x P x A) | Dimensioni: 35 x 4 x 2.2 mm |
| IC Components | DW01 + 8205A x 2 |
| Numero di modello | DE-DA-005 |
Figure 4.1: Physical dimensions of the BMS board.
Figure 4.2: The protection board's compact size, shown in hand for scale.
5. Informazioni sulla sicurezza
Always observe the following safety precautions when working with lithium batteries and protection circuits:
- Ensure correct polarity when connecting the battery to the BMS. Incorrect connections can cause damage to the board, battery, or connected devices.
- Do not exceed the specified maximum continuous discharge current (4A) or overcurrent detection current (5A).
- Use appropriate charging voltage (4.2V) for 1S lithium batteries.
- Evitare cortocircuiti sui terminali di uscita.
- Handle the board with care to prevent electrostatic discharge (ESD) damage.
- Tenere fuori dalla portata dei bambini.
- If the board shows signs of damage or malfunction, discontinue use immediately.
6. Installazione e cablaggio
Proper wiring is crucial for the correct function and safety of the BMS. Refer to the diagram below for connection details.
Figure 6.1: Wiring Diagram for 1S 3.7V Lithium Battery Protection Board.
Istruzioni di cablaggio:
- Si+: Connect this terminal to the positivo (+) terminal of your 3.7V lithium battery.
- B-: Connect this terminal to the negativo (-) terminal of your 3.7V lithium battery.
- P+: Questo è il positivo (+) terminal for the battery pack's output and charging input. Connect your load or charger positive here.
- P-: Questo è il negativo (-) terminal for the battery pack's output and charging input. Connect your load or charger negative here.
Ensure all connections are secure and properly insulated to prevent accidental short circuits.
Figura 6.2: Esample application of the protection board in a battery pack.
7. Funzionamento
Once correctly wired, the BMS operates automatically to protect the connected lithium battery. During charging, it monitors the battery voltage to prevent overcharge. During discharge, it ensures the battery does not drop below its safe minimum voltage and limits current to prevent overcurrent conditions. In case of a short circuit, the protection circuit will activate, temporarily cutting off the output.
8. Manutenzione
The DAOKAI BMS board requires minimal maintenance. To ensure optimal performance and longevity:
- Keep the board clean and free from dust and moisture.
- Evitare di esporre la tavola a temperature estreme o alla luce solare diretta.
- Periodically inspect connections for any signs of corrosion or loosening.
- Do not attempt to modify or repair the board yourself. Contact qualified personnel if issues arise.
9. Risoluzione Dei Problemi
- Nessuna uscita Voltage: Check all wiring connections for correct polarity and secure contact. Verify the battery voltage is within the operational range (above overdischarge detection voltage). A short circuit might have triggered protection; remove the short and reconnect.
- Batteria non in carica: Assicurare il volume di caricatage is 4.2V. Check connections to P+ and P-. The battery might be fully charged, or overcharge protection has been activated.
- Output Cuts Off Under Load: This indicates overcurrent protection. Reduce the load or ensure the continuous discharge current does not exceed 4A. Check for any partial short circuits in the load.
10. Contenuto della confezione
Il pacchetto include:
- 10 x DAOKAI 1S 4A 3.7V 18650 Lithium Battery Protection Boards
- 1 x 1m Nickel Strip
11. Garanzia e supporto
DAOKAI products are manufactured to high-quality standards. For any technical support or warranty inquiries, please refer to your purchase documentation or contact the seller directly. Keep your proof of purchase for warranty claims.