Coolants are typically liquids that allow the transfer of heat between the battery cells and a heat sink. Typically the heat sink is air, but could be water for a boat or a ground heat sink for stationary battery packs.

The most commonly used coolants are:

  • Water
  • Deionized water
  • Water glycol
  • Dielectric fluids
    • Single phase
    • Two phase
  • Refrigerants

Dielectric Fluids

What are the key parameters for dielectric fluids as used in a battery pack? We take a look at a few reference papers to build an initial list.

There are many options for cooling batteries. However, dielectric immersion cooling is seen as perhaps the ultimate high performance cooling method for battery cells. In this particular case we are focusing on the single phase dielectric cooling fluids.