Description:

This project focuses on developing a modular 15kW energy storage system that incorporates advanced electronics for optimized performance and safety. The system features CAN-bus and active balancing, ensuring efficient energy distribution across battery cells for enhanced longevity and reliability. A standout feature is the optional integrated fire extinguisher, offering an extra layer of safety in critical environments. Designed for modularity, the system allows for flexible scaling and easy integration into larger energy management systems, making it ideal for industrial, renewable energy, and smart grid applications.

Building blocks:

The essential building block of this battery system is our balancer/cell module. This module allows for a linear array of cells, each with own voltage measurement and multiple temperature sensors. This is complemented with a 10A active balancer and a PTC heater pass-through.

The BMS board is specific for this Off-Grid system and provides the split charge and discharge connections and the proprietary CAN-bus connection and protocol. Due to the semiconductor-based switching, it is only suitable for 24V packs.

A new feature for this battery system is the optional interconnected fire extinguisher module. This maintenance-free module has a 15 year lifespan (both aerosol and the backup battery). It's BMS connection allows for remote insight in status, voltages, temperature, serial numbers and expiration date.

24V 560Ah Battery concept

Specifications:

  • Operating voltage 20-30VDC (nominal ~25.6V)
  • 105Ah or 280Ah LiFePO4 cells in 8S1P or 8S2P configurations
  • 200A Discharge and 100A charge paths, individual switchable, short-circuit proof
  • Balancer current up to ~10A
  • Independent charge and discharge shunt resistors for current measurement and charge accumulation
  • State of Charge operating region 10% to 95%
  • Statistics-based balancing and advanced OCV-based end/top balancing
  • Heater output for cold climate operation (charge < 0°C, discharge < -20°C)
  • Battery statistics for delivered energy, saved energy, cell voltages and charge cycles
  • Event logging via CAN-bus
  • CAN-based OGS control® bus connects up to 48 batteries with the OGS control® Master
  • Optional fire extinguisher system
  • Optional front panel graphic display

Batteries:

  • 28V 105Ah (~3kWh), modular hot plug'n'play, split charge/discharge, OGS CAN-bus
  • 28V 560Ah (~15kWh), modular hot plug'n'play, split charge/discharge, OGS CAN-bus
'OGS control' is a registered trademark of Reijneveld Machinebouw B.V.