1. Introduction and Overview
The JBD Smart Seplos BMS 2.0 is an advanced Battery Management System designed for Li-ion (NCM) and LiFePo4 battery packs. It offers robust protection, precise balancing, and versatile communication capabilities for energy storage applications. This manual provides essential information for the safe and effective installation, operation, and maintenance of your BMS.
Key Features:
- Supports NCM/LiFePo4 battery packs.
- Available in various continuous charging/discharging current ratings: 50A, 100A, 150A, 200A.
- Compatible with different string numbers: 8S, 13S, 14S, 15S, 16S.
- Passive balancing function (150mA Max).
- CANBUS and RS485 communication protocols for inverter compatibility and parallel operation.
- Comprehensive protection features: Over current, over voltage, under voltage, individual cell over voltage, temperature protection, over charge/discharge protection, and short circuit protection.
- LCD communication for real-time monitoring.
- PC software communication for detailed monitoring and parameter modification.
- Supports up to 16 units in parallel operation.
Figure 1: JBD Smart Seplos BMS 2.0 boards
2. Technical Specifications
The following tables detail the specifications for the Smart Seplos BMS 2.0, categorized by battery type (LiFePo4 and NCM).
General Specifications:
- BMS Dimensions: 300mm x 100mm x 20mm
- 50A BMS variant does not include a heat dissipation sheet.
- Balance Function: Passive balance (150mA Max)
- Working Temperature: -20℃ to 70℃
- Compensating Impedance: 10mΩ
- Pre-charging: 0-3000ms
- Discharge Output Impedance: <2mΩ
- Bluetooth APP: Not supported
LiFePo4 (LFP) Battery Pack Specifications (16S/15S):
| Parameter | Sub-Parameter | Value (LFP) | |||
|---|---|---|---|---|---|
| Battery type and serial number | LFP(16S/15S) | ||||
| Continuous charging/discharging current | 50A | 100A | 150A | 200A | |
| Communication protocol | CANBUS (default), RS485 (contact sales) | ||||
| Custom function | Heating function, External switch, RS485 protocol | ||||
| Power consumption | Working mode | <40mA | |||
| Sleeping mode | 0uA | ||||
| Capacity protection | Nominal capacity | 5-500Ah | |||
| Remaining capacity protection | 5% | ||||
| Short Circuit protection | Lock | Continuously short in the output circuit | |||
| Lock times | 5 times | ||||
| Lock release | Connected with charger | ||||
| Individual cell voltage protection | Over voltage | 3650mV | |||
| Under voltage | 2700mV | ||||
| Voltage protection | Over voltage | 57.6V | |||
| Under voltage | 41.6V | ||||
| Current protection | Over current | 60A | 110A | 160A | 210A |
| Over current protection time delay | 30mS | ||||
| Current limiting (charging) | Passive current limiting | 10A | |||
| Heating function | Start | 0℃ | |||
| Stop | 10℃ | ||||
NCM Battery Pack Specifications (14S/13S):
| Parameter | Sub-Parameter | Value (NCM) | |||
|---|---|---|---|---|---|
| Battery type and serial number | NCM(14S/13S) | ||||
| Continuous charging/discharging current | 50A | 100A | 150A | 200A | |
| Communication protocol | CANBUS (default), RS485 (contact sales) | ||||
| Custom function | Heating function, External switch, RS485 protocol | ||||
| Power consumption | Working mode | <40mA | |||
| Sleeping mode | 0uA | ||||
| Capacity protection | Nominal capacity | 5-500Ah | |||
| Remaining capacity protection | 5% | ||||
| Short Circuit protection | Lock | Continuously short in the output circuit | |||
| Lock times | 5 times | ||||
| Lock release | Connected with charger | ||||
| Individual cell voltage protection | Over voltage | 4200mV | |||
| Under voltage | 2900mV | ||||
| Voltage protection | Over voltage | 58V | |||
| Under voltage | 40.6V | ||||
| Current protection | Over current | 60A | 110A | 160A | 210A |
| Over current protection time delay | 30mS | ||||
| Current limiting (charging) | Passive current limiting | 10A | |||
| Heating function | Start | 0℃ | |||
| Stop | 10℃ | ||||
3. Components
The Smart Seplos BMS 2.0 typically includes the main BMS board and may come with an optional LCD module and wiring harness, depending on the purchased variant.
Figure 2: BMS board with LCD module connected via ribbon cable.
Figure 3: LCD module for monitoring and control.
Figure 4: BMS board with included wiring harness for cell connections.
Note: Some BMS variants (e.g., 'BMS' only) support LCD and PC software but do not support Bluetooth APP functionality. Please verify your specific model's capabilities.
4. Installation Guidelines
Proper installation is crucial for the safe and efficient operation of the BMS. Always ensure power is disconnected before making any connections.
System Integration Diagram:
Figure 5: Example system diagram for BMS integration in a renewable energy setup.
Connection Steps (General):
- Prepare Battery Pack: Ensure your Li-ion or LiFePo4 battery pack is correctly assembled with the specified number of cells (8S, 13S, 14S, 15S, 16S).
- Connect Balance Wires: Carefully connect the balance wires from your battery cells to the corresponding ports on the BMS. Ensure correct polarity and sequence.
- Connect Main Power Cables: Connect the main positive (B+) and negative (B-) terminals of the battery pack to the designated terminals on the BMS.
- Connect Load/Charger: Connect your load and/or charger to the appropriate output terminals (P+ and P-) on the BMS.
- Optional: LCD Module: If using an LCD module, connect it to the dedicated port on the BMS.
- Optional: Communication Cables: For inverter communication or PC monitoring, connect CANBUS or RS485 cables as described in the Communication section.
- Power On: Once all connections are secure and verified, power on the system.
Warning: Incorrect wiring can damage the BMS, battery, and connected equipment. If you are unsure, seek professional assistance.
5. Communication Protocols
The Smart Seplos BMS 2.0 supports both CANBUS and RS485 communication for seamless integration with inverters and PC monitoring.
Communication Ports:
Figure 6: CANBUS and RS485 interface on the BMS board.
- CANBUS Interface: Used for communication between the battery system and inverters. Default baud rate: 500kbps.
- RS485 Interface: Used for communication between parallel battery packs or between the BMS and a PC for monitoring. Default baud rate: 19200bps.
Inverter Compatibility (CANBUS):
The CANBUS communication board has built-in protocols for various inverter brands. The BMS can automatically match or allow manual switching between protocols.
- Default Protocol: Pylontech CANBUS protocol.
- Supported Brands: Goodwe, Growatt (SPF off-grid protocol by default; SPH on-grid requires contacting sales), Victron, LUX POWER, Sofar, DEYE, Sermatec, RENAC, TBB POWER, SOLIS, SMA, FoxESS, IMEON.
- If your inverter brand is not listed, please obtain the protocol definition from your inverter supplier and contact JBD for compatibility confirmation.
Inverter Compatibility (RS485):
The RS485 communication board also has built-in protocols. Please confirm the required RS485 protocol with the sales person before purchase.
- Default Protocol: Pylontech RS485 protocol.
- Supported Brands: Voltronic, Phocos, Growatt.
- If your inverter brand is not listed, please obtain the protocol definition from your inverter supplier and contact JBD for compatibility confirmation.
PC Software Communication:
To view battery parameters and modify settings via PC software, connect the BMS to your computer using an RJ45 to USB Adapter. It is recommended to purchase the adapter from JBD to ensure proper functionality, as market-bought adapters may have different hardware definitions.
Figure 7: Internal block diagram of the BMS.
6. Operation
Once installed and connected, the BMS will begin monitoring and managing your battery pack. You can monitor its status through the optional LCD module or via PC software.
Monitoring via LCD:
The LCD module provides real-time data such as cell voltages, total voltage, current, temperature, and protection status. Use the buttons on the LCD to navigate through different display screens.
Monitoring via PC Software:
Connect the BMS to a PC using the recommended RJ45 to USB adapter. Install the provided PC software (link will be supplied after purchase). The software offers a detailed interface to view all battery parameters, logs, and allows for advanced configuration and parameter adjustments.
7. Maintenance
The Smart Seplos BMS 2.0 is designed for low maintenance. However, regular checks can help ensure optimal performance and longevity.
- Visual Inspection: Periodically inspect the BMS board and connections for any signs of damage, corrosion, or loose wiring.
- Cleanliness: Keep the BMS free from dust and debris. Use a soft, dry cloth for cleaning.
- Firmware Updates: Check with JBD for any available firmware updates that may improve performance or add new features.
8. Troubleshooting
This section provides general guidance for common issues. For complex problems, please contact technical support.
- BMS Not Powering On: Check all power connections (B+, B-, P+, P-) and ensure the battery pack is adequately charged. Verify balance wire connections.
- Communication Issues: Ensure correct cable connections (CANBUS/RS485). For PC communication, confirm the RJ45 to USB adapter is functioning correctly and the PC software is installed. Verify baud rates and protocols match between devices.
- Protection Triggered: If a protection (e.g., over voltage, over current) is triggered, the BMS will disconnect the battery. Identify the cause (e.g., overcharging, excessive load) and rectify it. Short circuit protection will reset after 5 attempts or by connecting a charger.
- Inverter Not Recognizing BMS: Verify the correct CANBUS or RS485 protocol is selected/matched for your inverter brand. Consult your inverter's manual for specific communication settings.
9. User Tips
- This BMS is compatible with 15S battery configurations.
- It is suitable for use with 24V battery systems.
- For RS485 communication, the BMS is compatible with Voltronic Axpert Max 10kW inverters. Ensure the correct RS485 protocol is configured.
10. Warranty and Support
For any technical assistance, warranty claims, or further inquiries, please contact the JBD Official Store where you purchased the product. Provide your product model and any relevant details to facilitate support.