US 12,352,350 B2
Oil-water double-cooling electric drive assembly, and new energy automobile
Jianwen Li, Beijing (CN); Ping Yu, Beijing (CN); and Xudong Yang, Beijing (CN)
Assigned to JING-JIN ELECTRIC TECHNOLOGIES CO., LTD., Beijing (CN)
Appl. No. 17/635,757
Filed by Jing-Jin Electric Technologies Co., Ltd., Beijing (CN)
PCT Filed Oct. 29, 2019, PCT No. PCT/CN2019/114069
§ 371(c)(1), (2) Date Feb. 16, 2022,
PCT Pub. No. WO2021/042465, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 201910828481.8 (CN), filed on Sep. 3, 2019.
Prior Publication US 2022/0316581 A1, Oct. 6, 2022
Int. Cl. F16H 57/04 (2010.01); B60K 1/00 (2006.01); B60K 11/02 (2006.01); F16H 57/02 (2012.01); H02K 5/20 (2006.01); H02K 7/116 (2006.01); H02K 9/19 (2006.01)
CPC F16H 57/0476 (2013.01) [B60K 1/00 (2013.01); B60K 11/02 (2013.01); F16H 57/02 (2013.01); F16H 57/0402 (2013.01); F16H 57/0415 (2013.01); F16H 57/0421 (2013.01); F16H 57/043 (2013.01); F16H 57/045 (2013.01); F16H 57/0457 (2013.01); H02K 5/203 (2021.01); H02K 7/116 (2013.01); H02K 9/19 (2013.01); B60K 2001/006 (2013.01); F16H 2057/02034 (2013.01); F16H 57/046 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electric drive assembly with oil/water dual cooling,
the electric drive assembly comprising:
a motor module having a motor housing, a motor shaft and a stator;
a gearbox module having a gearbox housing, and the gearbox housing is connected with a rear end of the motor housing;
a water cooling module having a motor water jacket and a heat exchanger, the motor water jacket is integrally cast with the motor housing, the motor water jacket is provided with a first water inlet and a first water outlet, the heat exchanger is disposed at a lower end of the gearbox housing, and the heat exchanger is provided with a second water inlet and a second water outlet; and
an oil cooling module having an oil conveying device, an oil conveying passage and an oil return passage, the oil conveying device is disposed at a bottom of the gearbox housing, the oil conveying passage is communicated with an inside of the motor housing and an inside of the gearbox housing, and the oil return passage is disposed at a bottom of the motor housing,
wherein the oil conveying passage comprises a first oil conveying passage, and the first oil conveying passage comprises a first oil storage tank, a first oil inlet, a first oil passage and a first oil outlet, and
wherein the first oil inlet is disposed on an upper part of a front end face of the gearbox housing above the motor housing, the first oil storage tank is disposed below the first oil inlet, the first oil passage is provided with the first oil outlet at a front end of an upper part of the motor housing, and the first oil outlet is positioned facing a front winding of the stator, the first oil passage is cast integrally with the motor water jacket,
wherein the water cooling assembly further comprises a water pipe as a first water passage, and the first water outlet and the second water inlet are communicated through the water pipe,
wherein a second water passage and a third water passage are further formed by casting in a housing between the motor water jacket and the heat exchanger, the second water passage is hermetically connected or integrally formed with the second water inlet, and the third water passage is hermetically connected or integrally formed with the second water outlet,
wherein the cooling fluid in the motor water jacket flows into the heat exchanger through the second water passage, after cooling the lubricating oil at the bottom of the gearbox housing, the cooling fluid flows back to the motor water jacket through the third water passage.