BattSense

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

Improving Performance

• 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

Ultimate safety operation

• 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

Increased flexibility

• 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)

Advanced communication

• 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