Features: TAO BMS

More than a BMS, it is an Energy Management System

  • protects & manages batteries from 12 to 48 volt
  • only 5 wires to connect per four cells stack and the BMS is operational
  • measures each cell voltage and temperature
  • 4 A active differential cell balancing based on open cell voltage
  • 20 custom monitoring ranges (voltage, temperature, SOC) to trigger alarms and/or relay outputs
  • 6 NO / NC isolated relay outputs to remote control external equipment or switching devices
  • charge management to start and stop chargers on your terms
  • integrated pre-charge commands for capacitive loads
  • manages the connection of a backup battery when needed
  • high precision current measure for accurate SOC estimation
  • measures cell resistance and actual battery capacity to estimate a State of Health
  • deported led and control panel with relay reset and emergency shutdown button
  • ongoing self-diagnostics
  • PC and Mac application to configure the BMS and monitor the battery
  • fault simulation mode to validate configuration and proper operation of all connected equipment

Key Features

Dynamic differential cell balancing
  • keeps cells voltage within a user defined voltage range at all time
  • activated by a user defined voltage difference between cells (either measured voltage or open circuit voltage*)
  • simultaneously discharges the cell with the highest voltage and charges the cell with the lowest voltage
  • high efficiency energy transfer without any heat dissipation
  • a total of 4 Amps balancing current
Measures
  • battery voltage, current, temperature and internal resistance
  • battery state of charge*
  • battery state of health*
  • battery measured capacity*
  • power consumption
  • number of charge cycles*
  • cell voltage, temperature and resistance
20 custom voltage, temperature and SOC ranges (triggers)
  • each range is fully programmable:
    • minimum or maximum cell / battery measure
    • can be based on differential measure between cells
  • an event is triggered if a measure is outside a defined range
    • can activate one or more relay output
    • can activate one or more led on the control panel
    • a separate value is used to reset the event (hysteresis)
  • Integrated pre-charge management for capacitive loads
Charge cycle management*
  • you set lower and upper limits for state of charge
  • the chargers are disabled when the upper limit is reached and are enabled when the battery is discharged to the lower limit
  • a full charge is enabled at regular intervals
Deported indicator panel
  • green heart beat led for normal operation and balancing status
  • combination of 4 led for warning and alarm events (red / yellow)
  • 8 0dB buzzer with a “silence” push button
  • relay outputs reset button
  • emergency shutdown button to activate selected relay outputs
6 relay outputs
  • relay outputs are “dry” contacts (no voltage / no polarity)
  • each event trigger and the “emergency shutdown” button can activate zero, one or more relay outputs
  • configurable time delay between an event trigger and the activation of relay outputs
  • configurable time delay between relays if more than one relay are activated by one event
  • each relay output is protected and can handle 2 Amps continuous (7 Amps for 0.5 second)
  • each relay output can be set as Normally Open (NO) or Normally Closed (NC)
  • compatible with most equipment to control their operation (chargers, converters….)
  • Integrated pre-charge management for capacitive loads

Diagnostics & fault simulation
  • comprehensive self-diagnostics performed at startup and every hour
  • cell voltage and temperature simulation mode for system wide testing
    • validate ranges and event trigger settings
    • validate relay output configuration and wiring
    • validate proper operation of equipment controlled by the relay outputs
Factory settings are good to go in most cases
  • 10 preset ranges (triggers):
    • warning level for voltage and temperature (high, low, cell differential)
    • alarm (cutoff) level for voltage and temperature (high, low)
  •  3 preset relay outputs:
    • disconnect charge
    • disconnect load
    • isolate battery 
  • the emergency shutdown button activates all the relay outputs in a sequential manner

TAO BMS (12 volt base) includes:
  • main unit in a 160 x 114 x 46 cm enclosure with:
    • battery wire harness (four cell connectors, a fuse for each cell connection, and a ground)
    • six relay outputs 
    • one connector for the remote indicator and control panel
    • one connector for a current measuring shunt
    • one connector for the computer or the TAO Monitor
  • remote indicator and control panel (with a 10 meter cable)
  • USB cord to connect a PC / Mac
  • application BMS Config to program the BMS, monitor cell status and run diagnostics (Windows 10 / Mac 10.15 and above)

* requires the “BMS Shunt”
** for batteries above 12 volt, a “BMS Extension” is required for each additional 12 volt

Leave a Reply