US 12,233,690 B2
Cascade heat pump system for electric vehicle
Xinding Guan, Shanghai (CN); Haijun Xie, Shanghai (CN); Henry Xiaoli Huai, Shanghai (CN); Yujun Dong, Shanghai (CN); and Gangping Fu, Shanghai (CN)
Assigned to Kelvin New Energy Technology Co., Ltd., Shanghai (CN)
Filed by Kelvin New Energy Technology Co., Ltd., Shanghai (CN)
Filed on Dec. 14, 2022, as Appl. No. 18/081,435.
Claims priority of application No. 202210681423.9 (CN), filed on Jun. 15, 2022.
Prior Publication US 2023/0406073 A1, Dec. 21, 2023
Int. Cl. B60H 1/32 (2006.01); B60H 1/00 (2006.01)
CPC B60H 1/323 (2013.01) [B60H 1/00278 (2013.01); B60H 1/00392 (2013.01); B60H 1/00485 (2013.01); B60H 1/3223 (2013.01); B60H 1/3227 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cascade heat pump system for an electric vehicle, comprising:
a low-pressure-stage compression device comprising a low-pressure-stage compressor, a low-pressure-stage evaporator, a low-pressure expansion valve, and a low-pressure-stage intercooler connected in sequence, wherein the low-pressure-stage compression device is configured to enable a first working medium to circulate in the low-pressure-stage compression device;
a high-pressure-stage compression device comprising a high-pressure-stage compressor, a high-pressure-stage four-way valve, an air-side heat exchanger, a water-side heat exchanger, a cabin heat exchanger, and a battery heat exchanger, wherein a compressor outlet of the high-pressure-stage compressor communicates with one of the air-side heat exchanger or the water-side heat exchanger, the air-side heat exchanger communicates with the cabin heat exchanger and the battery heat exchanger separately, the high-pressure-stage compression device is configured to enable a second working medium to circulate in the high-pressure-stage compression device, wherein the low-pressure-stage intercooler is configured to enable heat to exchange, in the low-pressure-stage intercooler, between the second working medium and the first working medium; and
a functional heat exchange device comprising a motor heat exchange assembly, a heat exchange water tank, a battery heat exchange member, and a cabin heat exchange member, wherein
a heat exchange inlet of the motor heat exchange assembly communicates with one of a heat exchange outlet of the heat exchange water tank or a heat exchange outlet of the battery heat exchange member, and a heat exchange outlet of the motor heat exchange assembly communicates with one of a heat exchange inlet of the heat exchange water tank or a heat exchange inlet of the cabin heat exchange member;
a heat exchange inlet of the battery heat exchange member communicates with a heat exchange outlet of the battery heat exchanger, the heat exchange outlet of the battery heat exchange member communicates with one of a heat exchange inlet of the battery heat exchanger or the heat exchange inlet of the motor heat exchange assembly; and
the heat exchange inlet of the cabin heat exchange member communicates with one of the heat exchange outlet of the motor heat exchange assembly or a heat exchange outlet of the cabin heat exchanger, and a heat exchange outlet of the cabin heat exchange member communicates with one of a heat exchange inlet of the cabin heat exchanger or the heat exchange inlet of the battery heat exchanger.