Custom Battery Packs

Techrules REN

Key project requirements

|   Sport PHEV application
|   50C Maximum discharge rate
|   70% Cell to pack weight ratio
|   Pack energy density exceeding 126Wh/kg

Podium Advanced Technologies has designed the innovative four motors and turbine range extender architecture and the battery pack of Ren, the first production vehicle from the Chinese automotive company Techrules that made its debut at the 2017 Geneva Motor Show with an innovative design style signed by Fabrizio and Giorgetto Giugiaro.

The battery pack is designed and manufactured by Podium Engineering specifically for the Ren. It will come in three capacities of 14 kWh, 25 kWh and 32 kWh and can be charged to 80% capacity in under 15 minutes using a DC fast charger.

The target lifespan of the battery is 100,000 cycles. The batteries feature an innovative design and incorporate battery management technologies that enable superior charging efficiency and power balancing between battery cells. Each cell voltage and temperature are independently monitored. Cells are connected via a circuit board instead of wires, for greater durability. The number of cells is 1,344 cell for the 25 kWh version and the pack can deliver 1,200 A, enough to drive six wheel motors at full power.

The battery management system (BMS) is integrated and designed to optimise the performance and life of the battery while ensuring absolute safety. There are three water cooling circuits for the motors, battery and inverter. 

Battery Management System Hardware features

  • Scalable: decentralized architecture BMS and several CSCs
  • Voltage level: 400V and up to >800V
  • Safety
  • Double μC with redundant communication (digital fault lines for OV, UV, OT)
  • Insulation monitoring unit
  • Crash detection, interlock signal, liquid leak detection
  • Interfaces
  • 2x CAN Bus
  • Low voltage interfaces
  • Analog and digital I/O’s
  • Channels for contactors and relays control
  • 2x Analog Current sensor interfaces
  • 4x HV measurement channels
  • Min 6 to max 16 cells voltage measurement per CSC
  • Max 8 temperature sensors per CSC

Battery Management System Software features

  • Cell limits monitoring
  • Power prediction (SoP)
  • SoC and SOH Evaluation
  • Balancing control
  • Contactor Control
  • Thermal Management Control
  • Data Logging
  • Operating Mode Control
  • Start-up and pre-charge
  • Driving
  • Charging
  • Shut down and discharge
  • Charger (AC & DC) Interfaces

Fill the form and upload your CV