The cost-efficient, modular, high performant BMS for all your mobile and stationary energy storage  packs

The BattSense battery management system with dynamic cell balancing is designed to provide maximal safety, efficiency and an increased lifespan for cell-based electrical energy storage solutions.

Electrical Storage Products Targets

  • Stationary electrical energy storage systems coupled to renewable energy sources
  • Mobile electrical energy storage systems for cordless applications
  • Automotive batteries
  • Peak power shaving solutions for industrial and railway systems

BattSense Architecture (Reference topology)

  • Modular concept supported by a master/slave configuration
  • One master to manage 2 slaves for a total of 42 cells
  • Masters can be cascaded, serialized or parallelized for complex battery pack design
  • The master controls all cells using individual voltage and balancing units (VBUs) which are   integrated in the electronic stack
  • Power to VBUs is provided from the master, not from the cell
  • Configurable remote access with data logging
  • Master to master communication using CAN-bus

BattSense Features & Benefits


  • Simultaneous voltage measurement of all cells for accurate state of charge (SoC) calculation with double digit performance improvement to combine with under development state of health (SoH) estimation
  • Permanent dynamic cell balancing during charge and discharge for individual cells
    • Increase of the cells life expectancy by early curing cell imbalance
    • Battery in balance leading to optimal performance of the battery systems
  • Dynamic safe operating area for improved use of battery capacity including voltage, current and temperature interdependency


  • Cell and system level safety measurements (voltage, temperature, current and insulation fault detection) with configurable warning and alarms
  • Dynamic safe operating area for increased individual cell protection
  • Regular check of physical connections between cells and voltage balancing units to improve reliability
  • Limited heat dissipation thanks to limited balancing currents leading to cost reduction in electronic components
  • External BMS power supply to guarantee battery shelf life
  • Charge and discharge relays which are operated independently


  • Easy to install with automatic configuration to reduce installation and maintenance overhead
  • Remote communication to enable configuration and firmware updates from a distance
  • Adaptive model-based multi-chemistry secondary cell support : Li-Ion, Pb-Ac (and NiMH under validation)
  • Ultra-Caps / Lithium-Caps support allowing hybrid configuration of battery cells plus ultra-caps
  • High current (48Vdc) battery pack design ready
  • High voltage pack design up to 800Vdc (210 cells in series)


  • Data logging via optional SD card
  • Remote management via GPRS, TCP/IP
  • Ethernet and CAN-bus towards energy management support

BattSense specifications

  • Power requirement: < 15 mW/cell (not powered from individual cell)
  • External power supply:  18..32 VDC
  • Current draw from cell: ~ 5µA
  • Number of cells: Up to 42 cells per master; up to 31 masters
  • Dimension: 171.5(W) x 263(L) x 103(H) mm (max. 42 cells)
  • Conversion accuracy/resolution: 4mV/2.44mV
  • Sampling rate: 5Hz at system level
  • Conversion time: 0.25 ms
  • Cell voltage range: 0 – 5V
  • Measurement voltages/current: simultaneous
  • Master data interface: CAN bus 500kbit/s – 11bit IDs
  • Remote access interface: UTP, GPRS
  • Digital I/O: 4 isolated inputs, 2 relay outputs
  • Analog inputs: Redundant voltage for LV-25P; hall current sensor
  • VBU temperature sensor: Input for NTC 10kOhm (max. 1/cell)
  • Temperature input range: -20°C..80°C, 0.5°C resolution
  • Isolation voltage (power): 1500 V
  • Isolation voltage (CAN bus): 2500 V
  • Ambient temperature: -20°C..65°C
  • Certifications
    • Low Voltage Directive
      • EMC compliance tested:
        • (EU) For Emission: EN 61000-6-3:2007 + A1:2011 (Light Industrial)
        • (EU) For Immunity: EN 61000-6-2:2005 (Industrial)
        • (US) FCC Title 47.Part 15
        • (CA) ICES-003 Issue 6:2016
  • Cell connection interface: DB25
  • Patents:
    • EP 3061197 A1: Method and system for providing pulsed power and data on a bus
    • EP 2101388 B1: Charge balancing circuit for ultra-capacitors and lithium batteries
    • EP 2302757 A1: Method and system for balancing electrical energy storage cells
    • EP 2230529 B1: A power cell system with means for detecting a discontinuity
    • EP 1265076 B1: Safety device for monitoring a DC bus insulation

Contact us!

Sofie Ignoul
Business and Relationship Development at Energyville/VITO

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