1. BMS1802 Introduction

Introducing the LiBat™ BMS1802, a groundbreaking daisy-chain slave device specifically engineered for 5S-18S lithium battery packs. Tailored to meet the demands of energy storage and mobility applications, this Battery Management System (BMS) redefines efficiency and precision in battery control. Serving as a dedicated slave unit, the BMS1802 seamlessly integrates into lithium battery configurations, offering a comprehensive solution for monitoring and managing power in a wide array of applications. With its advanced features and adaptability, this device stands as a pivotal component in optimizing the performance and safety of lithium battery packs. Embrace the future of battery management with BMS1802 where reliability and innovation converge for enhanced energy solutions.

Key Features:

  • Compact Size 103.1mm x 125.1mm
  • Easy-to-use, no HW configuration
  • Plug and Play no SW configuration
  • 5S-18S cell measurement with 0.1mV resolution
  • Adjustable passive balancing current up to 1A.
  • Auto deep sleep
  • 1.5kV Isolated daisy-chain communication line
  • Self powered
  • 5 external, 3 internal NTC
  • LEDs for balancing and status
  • Standart RJ45 CAT-5 patch cable for daisy-chain
Fig.1.1: BMS1802, Top Look
Fig.1.2: BMS1802, Bottom Look

Table.1.1: BMS1802 Technical Specifications

PARAMETER SPECIFICATIONS
Power Source Self powered. No external power need.
Power Consumption Power Down: ~0.050 mW , RUN State: ~300mW
Wake Up Trigger Master Communication Start
LED Run Status
Digital Interface 2 x 1.5kV Isolated Daisy-Chain ( 2xRJ45 )
Number of cells Up to 18 Cells. Minimum 11 V
Cell Type Any battery cell in voltage range
Minimum cell voltage 250 mv
Maximum cell voltage 4500 mV
Accuracy of Cell Voltage Measurement ±1.6mV typical, < ±8.3mV max
Balance Method Passive Balancing
Balance Current 1000mA @ 4.2Vdc cell voltage
Balance Power 8W max. per cell
Temperature Sensor Type NTC, 10KΩ @ 25 °C
Temperature Sensor Accuracy ±1.5 °C (depends on sensor sensitivity)
Number of Temperature Sensor Up to 3 external sensor probes, 1 x On board NTC
Operating Temperature -20 °C to +70 °C (-4° F to +158° F)
Relative Humidity 5% to 95% (non-condensing)
Dimensions and Weight 103.1 mm X 125.1 mm X 17.8 mm, 60g