20240030519. THERMAL MANAGEMENT SYSTEMS WITH PASSIVE QUENCHING SACKS FOR LIQUID IMMERSION COOLED BATTERY ASSEMBLIES simplified abstract (GM GLOBAL TECHNOLOGY OPERATIONS LLC)

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THERMAL MANAGEMENT SYSTEMS WITH PASSIVE QUENCHING SACKS FOR LIQUID IMMERSION COOLED BATTERY ASSEMBLIES

Organization Name

GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor(s)

Jermain E. Onye of Raleigh NC (US)

Ryan P. Hickey of Austin TX (US)

Pooja Suresh of Madison Heights MI (US)

Andrew P. Oury of Troy MI (US)

THERMAL MANAGEMENT SYSTEMS WITH PASSIVE QUENCHING SACKS FOR LIQUID IMMERSION COOLED BATTERY ASSEMBLIES - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240030519 titled 'THERMAL MANAGEMENT SYSTEMS WITH PASSIVE QUENCHING SACKS FOR LIQUID IMMERSION COOLED BATTERY ASSEMBLIES

Simplified Explanation

The patent application describes a passive thermal management system for cooling battery assemblies, specifically traction battery packs with stacked battery cells. The system includes a fluid container that is placed inside the battery assembly, between the battery case and the battery cells. The fluid container holds a dielectric coolant fluid and has multiple fluid ports that connect to the battery cells to dispense the coolant fluid. Thermomechanical plugs, such as wax, film, or smart-material barriers, seal the fluid container ports and passively open at a predefined temperature to allow the coolant fluid to flow into the battery cells.

  • The patent application presents a passive thermal management system for cooling battery assemblies.
  • The system includes a fluid container that holds a dielectric coolant fluid.
  • The fluid container is placed inside the battery assembly, between the battery case and the battery cells.
  • Multiple fluid ports in the fluid container connect to the battery cells to dispense the coolant fluid.
  • Thermomechanical plugs seal the fluid container ports and passively open at a predefined temperature to allow the coolant fluid to flow into the battery cells.

Potential applications of this technology:

  • Electric vehicles equipped with this passive thermal management system can benefit from improved battery cooling, which can enhance battery performance and lifespan.
  • The system can be used in various battery assemblies, such as those used in renewable energy storage systems or portable electronic devices, to efficiently manage heat and maintain optimal operating temperatures.

Problems solved by this technology:

  • Battery assemblies, especially traction battery packs, generate significant heat during operation, which can negatively impact battery performance and lifespan. This passive thermal management system helps dissipate heat and maintain proper temperature levels, addressing this issue.
  • Traditional active cooling systems for battery assemblies often require additional components, such as pumps and fans, which can increase complexity, cost, and energy consumption. The passive nature of this system eliminates the need for such components, simplifying the design and reducing potential points of failure.

Benefits of this technology:

  • Improved battery cooling can enhance the overall performance and lifespan of battery assemblies, leading to better reliability and efficiency.
  • The passive nature of the system eliminates the need for additional components, reducing complexity, cost, and energy consumption.
  • The use of thermomechanical plugs provides a simple and reliable method for controlling the flow of coolant fluid, ensuring efficient cooling without the need for active intervention.


Original Abstract Submitted

presented are thermal management systems with passive quenching sacks for cooling battery assemblies, methods for making/using such systems, and vehicles equipped with such systems. a passive thermal management (ptm) system is presented for cooling a battery assembly, such as a traction battery pack with a battery case containing stacked battery cells. the ptm system includes a fluid container that mounts inside the battery assembly, interposed between the battery case and battery cells. the fluid container stows therein a dielectric coolant fluid and has multiple fluid ports that fluidly connect to the battery cells to dispense thereto the coolant fluid. thermomechanical plugs, such as wax, film, or smart-material barriers, seal the fluid container ports and passively open (e.g., melt, bend, disintegrate, expand, etc.) at a predefined temperature to thereby unseal the fluid ports such that the coolant fluid is fed from the fluid container into the battery cells.

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