JBD LFP Battery 4s 100A Hardware BMS LiFePO4 4S 12V 100A for Marine Machine with Balance Heating.
 
The JBD ZP04S014 is a 4-series (4S) 12V hardware battery management system (BMS) built specifically for LiFePO4 (lithium iron phosphate) battery packs.
 
Key Specifications
Nominal Voltage: 12V (4 strings of 3.2V LiFePO4 cells)
Current Range: 50A to 120A continuous discharge options
Dimensions: 144mm × 85mm × 10mm
Type: Hardware BMS (non-programmable / no smart communication UART/Bluetooth)
Balance Current: 20-30 mA
 
Core Features
Build: Uses an aluminum PCB for effective heat dissipation and tinned copper terminals.
Protections: Includes safeguards against overcharge, over-discharge, overcurrent, and short circuits.
Special Functions: Supports optional low-temperature heating functionality and series connections.
Common Applications: Small energy storage systems, solar street lamps, and 12V drop-in lead-acid battery replacements.
 
Component Identification
B- Terminal: Main negative terminal for battery pack.
C- Terminal: Negative terminal for charger and load.
P- Terminal: (If applicable, for separate discharge port) Negative terminal for load.
Balance Port: Multi-pin connector for balance wires (BC0, BC1, BC2, BC3).
NTC Port: Connector for external temperature sensor.
Reserved Switch Controller Port: For optional external switch.
 
Wiring Instructions
Follow these steps carefully to connect the BMS to your 4S LiFePo4 battery pack:
Prepare Balance Wires: Before connecting the multi-pin balance cable to the BMS, ensure the individual wires are properly prepared. If necessary, pull the wires from the connector to facilitate individual cell connection.
Connect B- Wire: Connect the main negative wire (B-) from the BMS to the total negative electrode of your 4S battery pack. Use a short, thick wire for this connection.
Connect Balance Wires (BC0-BC3):
BC0: Connect to the total negative pole of the battery (same as B-).
BC1: Connect to the positive pole of the first cell (Cell 1+).
BC2: Connect to the positive pole of the second cell (Cell 2+).
BC3: Connect to the positive pole of the third cell (Cell 3+).
BC4: Connect to the positive pole of the fourth cell (Cell 4+), which is also the total positive terminal of the battery pack.
Verify Balance Wire Voltages: After connecting the individual balance wires, measure the voltage between each adjacent wire (e.g., BC0-BC1, BC1-BC2, etc.). For LiFePo4 batteries, each cell voltage should be less than 3.5V. If voltages are correct, insert the multi-pin balance cable into the BMS balance port.
Connect NTC Temperature Sensor: Connect the external NTC temperature sensor to its designated port on the BMS. Position the sensor appropriately on the battery pack to monitor temperature.
Connect C- Wire: Connect the negative pole of your charger and load to the C- terminal of the BMS. Use a thick wire for this connection. The B- and C- wires should be robust enough to handle the continuous current.
Final Voltage Check: Measure the total voltage across the main output terminals of the BMS (B+ and C-). This voltage should be equal to the total voltage of your battery pack. If the voltages match, the protection board is correctly installed and should function normally.