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

• Modular concept supported by a master/slave configuration
• One master to manage 2 slaves for a total of 42 cells
• Masters can be placed in cascade, in series or in parallel for complex battery packs
• The master controls all cells, using individual voltage and balancing units (VBUs) that are integrated into the electronic configuration
• Power for VBUs is provided from the master, not the cell
• Configurable remote access with data logging is possible
• Master-to-master communication via CAN bus

BattSense Features & Benefits

IMPROVING PERFORMANCE

• Simultaneous measurement of the voltage of all cells to ensure accurate calculation with two-digit performance improvement of the state of charge and combine it with an estimate of the State of Health (SoH)of the battery.
• Permanent dynamic cell balancing during charging and discharging of individual cells
  • Increase in cell life expectancy repairing cell imbalances at an early stage
  • Battery is kept in balance which ensures optimal performance of the battery system
• Dynamic and safe processing for improved battery capacity utilization, including voltage, current and temperature interdependence

OPERATION IN UTMOST SAFETY

• Safety measurements at both cell and system levels (voltage, temperature, current, isolation fault detection) with configurable notifications and alarms
• Dynamic and safe workshop for additional individual cell protection
• Regular checks of physical connections between cells and voltage balancing units to further improve reliability
• Reduced heat dissipation due to limited balancing currents which reduces costs in electronic components
• External power supply to ensure better battery casing life
• Charge and discharge relays are operated independently

INCREASED FLEXIBILITY

• Easy to install with automatic configuration to reduce installation and maintenance costs
• Remote communication possible to perform configurations and firmware updates remotely
• Customizable model-based multi-chemistry secondary cell support: Li-Ion, Pb-Ac (and NiMH under validation)
• Support in Ultra-Caps / Lithium-Caps enabling hybrid configurations of battery cells and ultracaps
• High-current battery pack design (48Vdc) possible
• 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 for power management support

BattSense specifications

• Current requirements: < 15 mW/cell (not powered from individual cells)
• External power supply: 18..32 VDC
• Current drain from cell: ~ 5µA
• Number of cells: Up to 42 cells per master; up to 31 masters
• Dimensions: 171.5(W) x 263(L) x 103(H) mm (max. 42 cells)
• Conversion accuracy/resolution: 4mV/2.44mV
• Sampling frequency: 5Hz at system level
• Conversion time: 0.25ms
• Cell voltage range: 0 – 5V
• Measurements voltage/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
• Certificates
  • Low voltage directives
  • EMC tested for compliance:
  • (CA) ICES-003 Issue 6:2016
  • (US) FCC Title 47.Part 15
  • (EU) for Immunity: EN 61000-6-2:2005 (Industrial)
  • (EU) for Emission: EN 61000-6-3:2007 + A1:2011 (Light Industrial)
• Cell connection interface: DB25
• Patents:
  • EP 3061197 A1: Method and system for providing pulsed current and data on a bus
  • EP 2101388 B1: Load balancing circuit for ultracapacitors and lithium batteries
  • EP 2302757 A1: Method and system for balancing electrical energy storage cells
  • EP 2230529 B1: An energy cell system with means for detecting a discontinuity
  • EP 1265076 B1: Safety device for monitoring the insulation of a dc bus