BMS Main 2.1

Battery system controller

Battery system controller

Battery system controllers include BMS Main 1.x and BMS Main 2.x boards.

The system controller polls the BMS Logic modules, which measure the voltage and temperature of the battery cells. Based on the data received, the controller determines the current state of the battery (SOC, SOH, DOD, etc.) and protects it from damage.

Additional information

Firmware — upon request

Software — upon request

Features:

  • Fully configurable for different types of batteries (voltage levels, capacity, protections levels and delays).
  • Determination of a battery status:
    • State of charge (SOC)
    • Depth of discharge (DOD)
    • State of health (SOH)
    • Effective capacity
    • Cell resistance
    • Cycle counting
    • Energy counting (received, consumed and dissipated by balancing resistors)
  • Cell monitoring:
    • Recording every cell voltage
    • Temperature control
  • Current monitoring (bidirectional Hall-Effect sensor with supply voltage 5 volts)
  • Battery protections:
    • Overcurrent
    • Undervoltage
    • Overvoltage
    • High temperature
    • Low temperature
    • Heater control
    • Cooler control
    • etc.
  • Cell balancing
  • Continuous logging on an SD-card (full battery and BMS state)
  • Interfaces:
    • Ethernet (web interface to configure the system, Modbus TCP)
    • Wi-Fi (optional – web interface to configure the system, sending log files to a remote FTP server)
    • RS-485 (Modbus RTU)
    • CAN (CANopen protocol to configure the system, interaction with an external equipment)

System controller configuring

The system can be configured via a Web interface (a Web browser is required) via Ethernet. Also, system configuration can be performed over a Wi-Fi network (in this case, the BMS Wi-Fi expansion module must be installed in the board).



The system can be configured over the CAN bus using the ElectricDeviceMonitor software. A USB-CAN adapter is required to connect a PC to the system controller.



Parameter

Value

Supply voltage, V

9÷30

Current consumption @12 V, mA (max)

100

Relays count

4

Discrete inputs count

4

Discrete outputs count

4

Switching voltage of relays 3 and 4 (P6, P7 connectors), V (max)

55

Switching current of relays 3 and 4 (P6, P7 connectors), A (max)

8

Switching voltage of relays 1 and 2 (P8, P9 connectors), V (max)

55

Switching current of relays 1 and 2 (P8, P9 connectors), A (max)

3

Current sensor type

Hall-Effect sensor,

bidirectional,

supply voltage 5 V

(LEM series HASS, HTFS)

CAN bus speed, kbps

125, 250 (default), 500, 1000

RS-485 baud rate, bps

600, 1200, 2400, 4800, 9600 (default), 19200, 38400, 57600, 115200

Ethernet speed, Mbps

100

Number of BMS Logic boards (max)

20

Dimensions (length × width × height), mm

120 × 120 × 32.1

Weight, g

100±5

Operating conditions

Operating temperature range, °С

-40÷75

The degree of protection from external influences

IP00

BMS Main 2.x

BMS Main 1.x

Relays count

4*

2

Discrete inputs count

4*

-

Discrete outputs count

4*

4

CAN

CANopen, J1939,

support of SMA’s inverters, support of forklifts by Hyster-Yale, Crown, Combilift,

support of UPS

CANopen, J1939, support of SMA’s inverters

RS-485

Modbus RTU

-

Ethernet

Web interface, Modbus TCP

-

Additional modules

BMS Wi-Fi (Web interface; sending log files to a remote FTP server)

-

Data logging

on an SD-card (full battery and BMS state)

-

The algorithm for calculating the parameters of the battery

Enhanced

Standard

Algorithms for controlling the charging process

+

-

Work with other BMS devices

BMS Display,

BMS Indication,

BMS Crown

-

* The assignment of the relays, discrete inputs and outputs is configurable.

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