MORE ENERGY – LESS WEIGHT

OBRIST Powertrain batteries for PHEV and BEV applications are designed to fulfill customer expectations mostly related to increased specific energy and reduced costs. The most significant factor here is the choice of commodity - 18650 cells that are available at very low costs compared to prismatic or pouch-type Li-ion cells. High-performance and low-cost cooling bags are installed in the battery for cooling. In addition, the whole system was designed with a strong focus on excellent component integration to reduce complexity and material costs. The battery architecture has been tailored to automated production to achieve an extra level of reliability.

HV Li-Ion Battery

HV Li-Ion Battery

Battery Management System (BMS)

Battery Management System (BMS)

Cooling Bag

BMS Cooling Bag

Modules and Cooling Bags

BMS Modules and Cooling Bags

OBRIST Battery, Thermal management

Battery Thermal Management

Battery Thermal Management results

Battery Thermal Management

Key Facts

  • High Power (PHEV) Battery (11 - 16.6kWh (403V) – discharge: 165 - 365kW peak)
  • High Energy (BEV) Battery (19.5kWh (403V) – discharge: 80kW peak)
  • Homogenous Cell Temperature Distribution (max ∆T = 3-4 K at 5C discharge)
  • Battery Weight (without fluids): 112kg
  • Lowest NOx and PM Issues (due to simple intake manifold fuel injection)
  • Dimensions: 1050 × 334 × 182mm

More Energy - Less Weight

The 16.6kWh PHEV battery comes with 148Wh/kg specific energy at system level and 160kW continuous discharge power. When adapting this battery for BEV applications, the specific energy reaches 166Wh/kg – the best in its class for liquid cooled, high voltage batteries.

Cost Reduction

The most significant factor here is the choice of commodity - 18650 cells that are available at very low costs compared to prismatic or pouch type Li-ion cells. High-performance and low cost cooling bags are installed in the battery for cooling. In addition, the whole system was designed with a strong focus on excellent component integration to reduce complexity and material costs. The battery architecture has been tailored to automated production to achieve an extra level of reliability

Design Features

  • Low Cost and High Flexibility (due to the use of 18650 cells)
  • Liquid Cooling (for effective waste heat removal from cells)
  • Homogeneous Temperature Distribution (at high load operation)
  • Thermal Insulation (for better lifetime and performance)
  • Passive Safety (through robust steel housing)
  • Master/Slave BMS (with wireless voltage sensing)
  • Innovative Screwless Fixation System
  • Full Mounting Flexibility