1. Introducció
This manual provides essential information for the safe and effective use of your Daly LiFePo4 4S 12V Battery Management System (BMS). The Daly BMS is designed to protect LiFePo4 battery packs, ensuring their longevity and safe operation. These high-end, waterproof BMS units are available in various current ratings from 15A to 500A and feature innovative heat dissipation technology.
2. Informació de seguretat
WARNING: Improper installation or use can lead to battery damage, fire, or personal injury. Professional installation is highly recommended.
- The BMS is a professional accessory. Operating errors can result in product damage. Always read the instructions and refer to wiring diagrams carefully.
- Strictly forbidden to reverse the polarity of B- and P- cables of the BMS.
- Li-ion, LiFePo4, and LTO BMS are not universally compatible. Mixing different battery types or BMS types is strictly prohibited.
- Ensure the BMS is used with battery packs of the same string count (e.g., 4S BMS for a 4-string battery pack).
- Do not use the BMS in over-current situations or unreasonably lengthen the BMS cables. Consult customer service if you are unsure about BMS selection.
- Standard BMS units are not designed for series or parallel connection with other BMS units.
- Do not disassemble the BMS without permission.
- While the BMS has a waterproof function, its pins are metal and prolonged soaking in water should be avoided to prevent oxidation damage.
- Always use a dedicated lithium battery charger for your battery pack. Using incompatible chargers can cause voltage instability and damage to the BMS or battery.
- Do not revise the special parameters of Smart BMS models without permission.
- Daly BMS units are suitable for various applications including electric bicycles, forklifts, RV energy storage, and photovoltaic systems. For special conditions or customized functions, consult customer service.
3. Producte acabatview
The Daly LiFePo4 4S 12V BMS is a high-performance battery management system designed for robust protection and efficient operation of 4-string LiFePo4 battery packs. Key features include:
- Disseny impermeable: Durabilitat millorada per a diversos entorns.
- Innovative Heat Dissipation: Unique wave-type aluminum design improves heat dissipation area and efficiency.
- Protecció integral: Provides overcharge, over-discharge, over-current, and short-circuit protection.
- Wide Current Range: Available in models from 15A to 500A to suit diverse power requirements.
- Accessoris inclosos: Comes with a matching wire cable (sampling cable) for easy connection.
4. Especificacions
The Daly LiFePo4 4S 12V BMS is available in various current ratings, each with specific dimensions and cable specifications. All measurements are manual; please refer to the actual size according to the physical product.
| Atribut | Valor |
|---|---|
| Nom de marca | DALY |
| Número de model | 4S 12V BMS (Various current ratings) |
| Tipus d'accessori | Accessoris de bateries |
| Origen | Xina continental |
| Certificació | CE, FCC, RoHS, PSE |
Current-Specific Dimensions (Width*Length*Thickness)
| Corrent (A) | Mida (mm) | B-P- Cable (AWG) | Longitud del cable (mm) |
|---|---|---|---|
| 15/20 | 50*62*9/12 | 16 AWG | 300 |
| 30/40 | 61*80*12 | 12/10 AWG | 300 |
| 50/60 | 61*80*16 | 10 AWG | 300 |
| 80 | 66*150*19 | 7 AWG | 300 |
| 100 | 65*166*24 | 7 AWG | 300 |
| 80/100 | 65*184*33 | 7 AWG | 300 |
| 120/150 | 95*212*20 | 6 AWG | 300 |
| 200/250 | 130*221*32 | 2 AWG | 300 |
| 300/400/500 | 130*257*52 | 2 AWG | 300 |
Note: The size of the BMS is width*length*thickness.
Key Electrical Parameters (LiFePo4 4S)
For detailed parameters including discharge/charge currents, voltage protections, balance current, and temperature ranges, please refer to the comprehensive product parameter table image below. Values may vary slightly based on specific model and current rating.
5. Instal·lació i configuració
Careful attention to wiring is critical for safe and correct operation. Always use the matching cables provided with your BMS.
5.1 Esquema de cablejat
5.2 Passos de connexió
- Compatibilitat de cable: The wire cables from different manufacturers may not be standard. Always use the matching cables provided with your Daly BMS. Pay attention to B- and P- marks, as colors may vary.
- Sampling Cable Connection: When soldering the sampling wire cable, ensure it is NOT inserted into the BMS.
- Connexió de la bateria:
- Connect the fine black wire (B-) to the total negative electrode of the battery pack.
- Connect the second wire (red wire) to the positive pole of the first battery string.
- Continue connecting the positive electrode of each battery string in sequence until the last wire cable is connected to the total positive B+.
- Voltage Verificació: Before inserting the main connector into the BMS, measure the voltage between each two adjacent measurement points on the back of the plug. For LiFePo4 batteries, the voltage should be between 2.5V-3.8V. Ensure all voltages are correct before proceeding.
- BMS B- Line Connection: Connect the BMS B- line (thick blue line) to the total battery negative electrode. The B- line length should not exceed 40cm.
- Insert Wire Cable: Carefully insert the wire cable into the BMS connector.
- Post-Wiring Check: After completing all wiring, measure the voltage of the battery B+ and P-. If this voltage és igual al voltage of the battery pack itself, the BMS is working normally. If not, re-check the wiring sequence.
- Charging/Discharging Connections:
- For a common port BMS: The positive electrodes of the charging and discharging ends are directly connected to the total positive pole B+ of the battery. The charging and discharging negative poles are connected to the P- point of the BMS.
- For a split port BMS: The positive electrodes of the charging and discharging ends are directly connected to the total positive pole B+ of the battery. The negative pole of charging is connected to C-, and the negative electrode of discharge is connected to P-.
5.3 Snap-on Connection Cable
The BMS features a snap-on connection for the cable, ensuring a firm, secure, and easy insertion.
5.4 accessoris opcionals
Hardware BMS models may offer optional accessories such as NTC (Negative Temperature Coefficient) thermistors, soft switches, and GPS modules. These options are typically available for BMS units 80A and above. Consult sales for specific needs.
6. Funcionament
Once correctly installed, the Daly LiFePo4 4S 12V BMS will automatically manage and protect your battery pack. It continuously monitors cell voltages, currents, and temperatures to prevent damage from overcharge, over-discharge, over-current, and short circuits.
6.1 Choosing the Correct BMS Current
The selection of the BMS's continuous current rating is crucial. It should be compatible with your battery pack's maximum continuous discharge current. It is generally recommended to choose a BMS with a continuous current rating 1.5 to 2 times higher than your expected maximum output current.
7. Manteniment
- Mantenir sec: Although waterproof, avoid prolonged exposure to water to prevent oxidation of metal pins.
- Eviteu el desmuntatge: Do not attempt to disassemble the BMS unit. Unauthorized disassembly voids the warranty and can lead to damage.
- Càrrega adequada: Always use a dedicated LiFePo4 charger that matches your battery pack's voltage and chemistry.
- Inspecció periòdica: Periodically check all connections for tightness and signs of wear or corrosion.
8. Solució De Problemes
If you encounter issues with your Daly BMS, consider the following common problems and solutions:
- BMS Not Functioning After Installation: Re-check all wiring connections carefully, especially the sequence of the sampling cables and the polarity of B- and P-. Verify cell voltages are within the correct range before connecting the main plug.
- Incorrect Current Rating: Ensure the BMS current rating is appropriate for your battery pack's continuous discharge current. An undersized BMS can lead to protection activation or damage.
- Battery Type Mismatch: Confirm that your battery cells are LiFePo4 (3.2V nominal per cell) as this BMS is specifically designed for this chemistry. It is not compatible with 3.6V Li-ion cells.
- Modificació de paràmetres: Standard BMS units do not allow user modification of parameters like over-discharge voltage. Attempting to do so can damage the unit. For Smart BMS models, unauthorized parameter changes are forbidden.
- BMS Overheating: While the BMS has innovative heat dissipation, ensure it is installed in a location with adequate airflow, especially for higher current models.
For persistent issues or complex problems, please contact Daly customer service for assistance.
9. Consells d'usuari
- Match Cables: Always use the specific matching cables provided with your BMS. Cables from other manufacturers may have different standards or color codes.
- Pre-Connection Voltage Comproveu: Before making the final BMS connection, meticulously measure and verify the voltage of each cell and between adjacent measurement points on the balance plug. This prevents damage from incorrect wiring.
- Valoració actual: Select a BMS with a continuous current rating that is equal to or greater than your battery pack's maximum continuous discharge current. A common recommendation is 1.5 to 2 times the expected maximum output current.
- Especificacions de l'aplicació: If your application involves special conditions, customized parameters, or unique functions, always consult Daly customer service before purchase and installation.
10. Garantia i Suport
10.1 Garantia
The Daly LiFePo4 4S 12V BMS comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects under normal use. Damage resulting from improper installation, misuse, unauthorized modification, or external factors is not covered.
10.2 Certificacions
Our products are certified to meet international standards, ensuring quality and safety:
- Certificació CE
- Certificació FCC
- Certificació RoHS
- Certificació PSE
- Certificació ISO
10.3 Atenció al client
For any questions, technical assistance, or warranty claims, please contact Daly customer service. Provide your product model and a detailed description of the issue to receive prompt support.
