Custom Battery Packs

Lvchi Venere

Key project requirements

|   Full EV prototype
|   Usable energy above 100kWh
|   Gravimetric energy density above 180Wh/kg
|   320kW maximum discharge power

Podium Advanced Technologies has developed and built the first prototype of the 104 kWh battery pack for a high performance full electric car presented at 2018 Geneva Motor Show by Lvchi Auto Group, a Chinese manufacturer of electric vehicles. “Venere” is a high-performance, 740 kW all-electric four-seater, developed in partnership with Italian engineering and design firm I.DE.A. Institute.

The whole electric powertrain system – including the battery pack, the BMS, the electric motors controls – has been designed, developed and assembled by Podium.

The 100+ kWh lithium ion battery pack, using the proprietary Podium BMS, has been designed with the target to optimize the trade-off between max power output and range extension, and has been assembled entirely in the Podium laboratories, using leading-edge wire-bonding technology facility.

The electric powertrain consists of four electric motors, two installed on the front axle and two on the rear axle, combined with a differential per axle, so as to implement a permanent all-wheel drive. The differential housing also contains a two-speed transmission to optimize the distribution of torque and power.

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

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