Thermal management system for vehicles with a cabin climate control module

Patent metadata

Field	Value
Publication number	US-2025360839-A1
Application number	US-202519192249-A
Country	US
Kind code	A1
Filing date	Apr 28, 2025
Priority date	Jan 3, 2014
Publication date	Nov 27, 2025
Grant date	—

Abstract

This patent application is directed to thermal management systems of vehicles with an electric powertrain. More specifically, the battery system and one or more powertrain components and/or cabin climate control components of a vehicle share the same thermal circuit as the battery module through which heat can be exchanged between the battery module and one or more powertrain or climate control components as needed.

First claim

What is claimed is:

1 . A thermal management system for a vehicle with an electric drivetrain, the system comprising:
a battery system comprising at least one battery cell having a cycle life of at least 100 cycles, and an optimal operating temperature of about 75° C. or higher; an internal combustion engine (ICE); a shared thermal circuit thermally coupling the battery system and the ICE, comprising:
a working fluid,
at least one switch or valve for controlling the transfer of the working fluid, and
at least one external heat exchanger; and
a control system for controlling the heat exchange between the ICE and the battery system, wherein the control system actuates the at least one switch or valve.

2 . The system of claim 1 , wherein the control system is selected from a computer, a programmed chip, a microprocessor, or a logic circuit.

3 . The system of any one of claims 1-2 further comprising at least one electric motor or generator connected to the shared thermal circuit.

4 . The system of any one of claims 1-3 wherein the vehicle is a hybrid electric vehicle comprising an ICE and an electric motor.

5 . The system of any one of claims 1-4 further comprising motor power electronics thermally coupled to the shared thermal circuit.

6 . The system of any one of claims 1-5 further comprising a battery system charger.

7 . The system of any one of claims 1-6 wherein the thermal management system is configured to dissipate heat from devices connected to the shared thermal circuit via the external heat exchanger.

8 . The system of any one of claims 1-7 wherein the battery system has a cycle life of at least 100 cycles and is capable of operating at a temperature of 85° C. or higher.

9 . The system of any one of claims 1-8 wherein the optimal operation comprises greater than 50% power output from the battery relative to the rated power output of the battery.

10 . The system of any one of claims 1-9 wherein the battery system is configured to start the ICE.

11 . The system of any one of claims 1-10 wherein the battery system further comprises thermal insulation.

12 . The system of any one of claims 1-11 wherein the control system controls the transfer of the working fluid such that heat dissipated by the battery system transfers to one or more components on the shared thermal circuit, which are at a lower temperature than the battery system.

13 . The system of any one of claims 1-12 further comprising a climate control module, wherein heat generated by the battery system or other components in the shared thermal circuit transfers to the interior of the vehicle.

14 . The system of any one of claims 1-13 wherein the battery system comprises an enclosure, the enclosure having a floor surface thermally coupled to the shared thermal circuit and the external environment, the enclosure floor surface being configured to transfer heat between thermal fluid and the external environment.

15 . A thermal management system for a vehicle with an electric drivetrain, the system comprising:
a battery system comprising at least one battery cell having a cycle life of at least 100 cycles, and an optimal operating temperature between about 75° C. or higher; a shared thermal circuit thermally coupling the battery system and vehicle components coupled to the thermal circuit, comprising:
a working fluid,
at least one switch or valve for controlling the transfer of the working fluid, wherein a control system actuates the at least one switch or valve, and
at least one external heat exchanger; and
a control system for controlling the heat exchange between the battery system and the other components coupled to the thermal circuit.

16 . The system of any one of claims 1-15 , wherein the thermal circuit further comprises a fluid transfer module configured to operate based on signals received from the control system.

17 . The system of any one of claims 1-16 , further comprising a powertrain or powertrain component thermally coupled to the shared thermal circuit.

18 . The system of any one of claims 1-17 , wherein the external heat exchanger comprises one or more heat rejection devices configured to dissipate heat away from the thermal management system.

19 . The system of any one of claims 1-18 , comprising a single thermal circuit, a single pumping device, and a single external heat exchanger.

20 . The system of any one of claims 1-19 , wherein the battery system is characterized by a cycle life of at least 100 cycles and an optimal operating temperature of about 85° C. or higher.

21 . The system of any one of claims 1-20 wherein the shared thermal circuit comprises one or more pumping devices for transferring the working fluid in either direction within the circuit.

22 . The system of any one of claims 1-21 , wherein the control system is capable of causing the heat dissipated from a powertrain component to transfer to the battery module if the battery module is lower than a predetermined temperature.

23 . The system of claim 22 , wherein the predetermined temperature is 75° C.

24 . The system of any one of claims 1-21 , comprising a powertrain component having an electric motor.

25 . The system of any one of claims 15-24 , wherein the vehicle does not comprise an internal combustion engine.

26 . The system of any one of claims 1-24 and substantially as shown in FIG. 1 A, 1 B, 2 , 3 A, 3 B, 3 C, 4 A, 4 B, 5 A, 5 B, 6 A, 6 B, 7 A, 7 B, 8 A, 8 B, 9 A, 9 B, 10 A, 10 B, 11 A , 11 B, 11 C, or 11 D.

Assignees

• Quantumscape Battery Inc

Inventors

• Hettrich Kevin
• Wojcik Tomasz
• Hermann Weston Arthur

Classifications

• Y02T10/72

  Electric energy management in electromobility · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B60H1/00392

  for electric vehicles having only electric drive means · CPC title

• B60H1/143

  the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries · CPC title

• B60L2240/662

  Temperature · CPC title