Thermal Management Battery Solutions

Immersive EV Battery Cooling System

Last update: 28 Aug. 2023

What is an immersive battery cooling system?

As EV range extension cannot rely solely on increasing the size of batteries, the only alternative to match ICE vehicle’s usage is to increase the charging speed. Most OEMs aim to reach 80% charging in less than 15 minutes; this is called ultra fast charging or high-power charging at 250 kW and above.

However, injecting that level of energy into the battery pack generates a significant heat that may damage the cells if proper cooling is not used.

This is where dielectric immersive battery cooling brings benefits. The battery cells are “bathed” in a non electrically conductive liquid, keeping the temperature balance of the pack.

Valeo has teamed up with TotalEnergies to provide an optimized dielectric battery cooling solution for EVs, both performance, weight, carbon footprint and cost wise.

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What are our EV battery immersive cooling system benefits?

  • Thermal runaway mitigation
  • Enhanced battery cooling performance
  • Optimized battery lifetime
  • Carbon footprint reduced by 50% versus aluminium cooler

Valeo Immersive Battery Cooling System Specifications

  • Temperature unbalance at cells level <2°C and between cells
  • Compliant with Thermal Runaway propagation

Vehicle type

  • Passenger car
  • Bus
  • Truck
  • Robot taxi
  • Motorcycle
  • Bike
  • Droid
  • Off road

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