Battery pack thermal management system

Patent metadata

Field	Value
Publication number	US-12489157-B2
Application number	US-202217827074-A
Country	US
Kind code	B2
Filing date	May 27, 2022
Priority date	May 28, 2021
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A battery pack thermal management system includes a first circulation line in which a first refrigerant temperature-increased while passing through an electronic sub-assembly passes by a first control valve, dissipates heat in a first heat exchanger, and circulates back to the electronic sub-assembly, a second circulation line in which a second refrigerant circulates through a battery pack, a compressor, and a condenser in this order or through the condenser, the compressor, and the battery pack in this order, and a plurality of valves controlling a flow path along which the second refrigerant flows in the second circulation line. The plurality of valves are capable of temperature-increasing or cooling the battery pack by controlling a flow path along which the second refrigerant flows.

First claim

What is claimed is:

1 . A battery pack thermal management system comprising:
a first circulation line in which a first refrigerant circulates through a flow path on which a first compressor, a first heat exchanger, and an electronic sub-assembly are arranged passes by a first control valve, wherein the first refrigerant transfers heat in the first heat exchanger, cools the electronic sub-assembly, and returns to the flow path including the electronic sub-assembly; a second circulation line connected to a battery pack, a second compressor, and a condenser, and containing a second refrigerant flowing therethrough, wherein the battery pack is separated from the first circulation line; a plurality of valves controlling a flow path along which the second refrigerant flows in the second circulation line; and an accumulator disposed in the second circulation line and configured to allow the second refrigerant to pass therethrough before flowing into the second compressor, wherein the second refrigerant circulating through the second circulation line heats or cools the battery pack, depending on whether the plurality of valves are opened or closed, wherein the plurality of valves include a second control valve, a first opening and closing valve, a second opening and closing valve, a third opening and closing valve, and a first expansion valve, the second control valve is arranged between the second compressor and the battery pack, the first opening and closing valve is arranged between the second compressor and the condenser, the second opening and closing valve is arranged between the condenser and the second compressor, the third opening and closing valve is arranged between the battery pack and the second compressor, and the first expansion valve is arranged between the condenser and the battery pack.

2 . The battery pack thermal management system of claim 1 , wherein when the first opening and closing valve, the third opening and closing valve, and the first expansion valve are opened, the battery pack is cooled, and when the second opening and closing valve and the second control valve are opened, the battery pack is temperature-increased.

3 . The battery pack thermal management system of claim 1 , wherein a first branch line branching off from the first control valve is included in the first circulation line, a second heat exchanger is arranged in the first branch line, and thus the first refrigerant passes by the second heat exchanger and circulates along a flow path on which the electronic sub-assembly is arranged.

4 . The battery pack thermal management system of claim 3 , wherein a second branch line branching off from the second control valve is included in the second circulation line, an evaporator is arranged in the second branch line, and thus indirect heat exchange with the second heat exchanger is performed.

5 . The battery pack thermal management system of claim 1 , further comprising:
a processor, wherein the first circulation line further comprises a first branch line branching off from the first control valve, the second circulation line further comprises an evaporator and a second branch line branching off from the second control valve, and the processor controls the plurality of valves in such a manner that the second refrigerant circulates along the second circulation line in a manner that passes through the second compressor, the condenser, and the evaporator in this order.

6 . The battery pack thermal management system of claim 5 , wherein the processor controls the plurality of valves in such a manner that the second refrigerant circulates along the second circulation line in a manner that passes through the second compressor, the evaporator, and the condenser in this order.

7 . The battery pack thermal management system of claim 5 , wherein a second heat exchanger is arranged in the first branch line, and the processor controls the plurality of valves so that the first refrigerant flows into the first branch line and circulates along the first circulation line in a manner that passes through the second heat exchanger, the electronic sub-assembly, and the first compressor in this order.

8 . The battery pack thermal management system of claim 5 , wherein the processor controls the plurality of valves so that the second refrigerant circulates along the second circulation line in a manner that passes through the second compressor, the condenser, and the battery pack in this order.

9 . The battery pack thermal management system of claim 5 , wherein the processor controls the plurality of valves so that the second refrigerant circulates along the second circulation line in a manner that passes through the compressor, the battery pack, and the condenser in this order.

10 . The battery pack thermal management system of claim 5 , wherein when temperature of outside air is higher than first temperature, the processor cools the battery pack and, when the temperature of the outside air is the first temperature or lower, performs control in such a manner as to temperature-increase the battery pack.

11 . The battery pack thermal management system of claim 5 , wherein when temperature of the battery pack is higher than the first temperature, the processor cools the battery pack and, when the temperature of the battery pack is the first temperature or lower, performs control in such a manner as to temperature-increase the battery pack.

Assignees

• Uif Univ Industry Foundation Yonsei Univ

Inventors

• Hong Jong Sup
• Baek Kyeong Jun

Classifications

• H01M10/635

  based on ambient temperature · CPC title

• H01M10/625 Primary

  Vehicles · CPC title

• H01M10/6556

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M10/6569 Primary

  Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation (heat pipes H01M10/6552) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title