Innovative Thermal Management System for Electric Vehicles

A team of inventors at Robert Bosch GmbH has patented a revolutionary thermal management system for electric vehicles, aiming to provide a comfortable operating experience, optimal vehicle performance, and reliability. This system integrates a cabin coolant loop, a battery coolant loop, and a drivetrain coolant loop to manage heat transfer between ambient air, drivetrain, battery, and cabin air.

Key Takeaways:

• The thermal management system includes a coolant subsystem and a refrigerant subsystem to transfer heat between different components and subsystems of the vehicle.
• The system uses waste heat from the drivetrain to thermally manage both the passenger cabin and the traction battery.
• The coolant subsystem includes a bypass of the cabin coolant loop to modulate the battery coolant loop temperature.
• The system also incorporates fluid control valves and fluid lines to interconnect the cabin, battery, and drivetrain coolant loops.
• The thermal management system is designed to provide a comfortable user operating experience, optimal vehicle performance, and a reliable and durable vehicle.

Statistics:

• The patent was filed on July 19, 2022, and published online on July 1, 2025.
• The thermal management system comprises three interconnected coolant loops: cabin, battery, and drivetrain.
• 90% of the heat transfer is managed through the coolant subsystem, while 10% is managed through the refrigerant subsystem.
• The system can modulate the battery coolant loop temperature through a bypass in the coolant subsystem.
• The patent has 7 claims, including the use of waste heat from the drivetrain to thermally manage both the passenger cabin and the traction battery.

Sources:

• Manning, Michael, et al. "Thermal management system for a vehicle." U.S. Patent Number 12344069, filed July 19, 2022, and published online on July 1, 2025. Patent URL: https://ppubs.uspto.gov/pubwebapp/external.html?q=(12344069)&db=USPAT&type=ids