Oil-cooling electric drive device, oil-cooling electric drive system and vehicle

Abstract

The utility model discloses an oil cooling electric drive device, an oil cooling electric drive system and a vehicle, and relates to the technical field of vehicles. An oil inlet of the mechanical oil pump is communicated with an oil outlet of the electric drive transmission module, and the mechanical oil pump is driven by the electric drive transmission module; an oil inlet of the electronic oil pump is communicated with an oil outlet of the mechanical oil pump; an oil inlet of the oil cooler is communicated with an oil outlet of the electronic oil pump, and an oil outlet of the oil cooler is communicated with an oil inlet of the electric drive transmission module. The stability of the oil-cooled electric drive device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to an oil-cooled electric drive device, an oil-cooled electric drive system and a vehicle. Background Art

[0002] With the continuous development of science and technology, oil-cooled electric drive devices have gradually become the mainstream power source for mid-to-high-end vehicles.

[0003] At present, in oil-cooled electric drive devices, the electronic oil pump provides the required cooling oil for motor cooling and gear bearing lubrication of the reducer, that is, provides the required cooling oil for the electric drive transmission module (motor and reducer) in the oil-cooled electric drive device. However, due to the high viscosity of the cooling oil in low temperature environments and the power limitation of the electronic oil pump, the electronic oil pump in low temperature environments may not start normally or can only pump out a small amount of oil, which cannot meet the needs of the electric drive, resulting in the electric drive being unable to operate due to the lack of cooling and lubrication of the oil, which in turn causes the vehicle to stop.

[0004] In summary, how to improve the stability of oil-cooled electric drive devices is a technical problem that needs to be urgently solved in the field of vehicle technology. Utility Model Content

[0005] The main purpose of the utility model is to provide an oil-cooled electric drive device, an oil-cooled electric drive system and a vehicle, aiming to improve the stability of the oil-cooled electric drive device.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an oil-cooled electric drive device, which comprises:

[0007] Electric drive transmission module;

[0008] A mechanical oil pump, wherein the oil inlet of the mechanical oil pump is connected to the oil outlet of the electric drive transmission module, and the mechanical oil pump is driven by the electric drive transmission module;

[0009] an electronic oil pump, wherein the oil inlet of the electronic oil pump is connected to the oil outlet of the mechanical oil pump;

[0010] An oil cooler, wherein the oil inlet of the oil cooler is communicated with the oil outlet of the electronic oil pump, and the oil outlet of the oil cooler is communicated with the oil inlet of the electric drive transmission module.

[0011] In one embodiment, the electric drive transmission module includes a motor unit and a reducer unit, and an intermediate shaft of the reducer unit is connected to the mechanical oil pump to drive the mechanical oil pump to work.

[0012] In one embodiment, the oil-cooled electric drive device further includes:

[0013] A three-way solenoid valve, wherein the oil inlet of the three-way solenoid valve is connected to the oil outlet of the mechanical oil pump, the first oil outlet of the three-way solenoid valve is connected to the oil inlet of the electronic oil pump, and the second oil outlet of the three-way solenoid valve is connected to the connecting interface of the electronic oil pump and the oil cooler;

[0014] A control module, wherein the control module is used to control the oil inlet of the three-way solenoid valve to be connected to the first oil outlet or the second oil outlet.

[0015] In one embodiment, the oil inlet of the electronic oil pump is communicated with the first oil outlet, and the oil inlet of the electronic oil pump is communicated with the communication interface between the mechanical oil pump and the electric drive transmission module.

[0016] In one embodiment, the control module is used to control the oil inlet of the three-way solenoid valve to be connected to the second oil outlet when the ambient temperature is lower than a preset temperature and / or the electronic oil pump fails.

[0017] In one embodiment, the oil-cooled electric drive device further includes:

[0018] A first one-way valve is provided on a connection passage between the electronic oil pump and the oil cooler, and between the electronic oil pump and the communication interface of the second oil outlet.

[0019] In one embodiment, the oil-cooled electric drive device further includes:

[0020] A second one-way valve is provided on a connection passage between the second oil outlet and a communication interface between the oil cooler, the electronic oil pump and the second oil outlet.

[0021] In one embodiment, the oil-cooled electric drive device further includes:

[0022] An oil storage chamber, wherein the oil inlet of the oil storage chamber is communicated with the oil outlet of the electric drive transmission module, and the oil outlet of the oil storage chamber is communicated with the oil inlet of the mechanical oil pump.

[0023] The utility model also provides an oil-cooled electric drive system, which includes any of the oil-cooled electric drive devices described above.

[0024] The utility model also provides a vehicle, which includes any one of the above-mentioned oil-cooled electric drive systems.

[0025] The utility model provides an oil-cooled electric drive device, which includes an electric drive transmission module, a mechanical oil pump, an electronic oil pump and an oil cooler. The oil inlet of the mechanical oil pump is connected to the oil outlet of the electric drive transmission module. The mechanical oil pump is driven by the electric drive transmission module. The oil inlet of the electronic oil pump is connected to the oil outlet of the mechanical oil pump. The oil inlet of the oil cooler is connected to the oil outlet of the electronic oil pump. The oil outlet of the oil cooler is connected to the oil inlet of the electric drive transmission module.

[0026] In this way, compared with the traditional oil-cooled electric drive device in which the electronic oil pump cannot meet the cooling and lubrication needs of the electric drive transmission module due to the low temperature environment, the utility model adds a mechanical oil pump, and the electric drive transmission module drives the mechanical oil pump to work, ensuring that the mechanical oil pump can work normally when the electric drive transmission module is working, so as to meet the cooling and lubrication needs of the electric drive transmission module when the electronic oil pump cannot work normally, thereby improving the stability of the oil-cooled electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of a first embodiment of an oil-cooled electric drive device provided by the utility model;

[0029] Figure 2 This is a schematic structural diagram of a second embodiment of the oil-cooled electric drive device provided by the utility model.

[0030] Description of Figure Numbers:

[0031] 10. Electric drive transmission module; 101. Oil inlet of electric drive transmission module; 102. Oil outlet of electric drive transmission module; A1. Motor unit; A2. Reducer unit; 20. Mechanical oil pump; 201. Oil inlet of mechanical oil pump; 202. Oil outlet of mechanical oil pump; 30. Electronic oil pump; 301. Oil inlet of electronic oil pump; 302. Oil outlet of electronic oil pump; 40. Oil cooler; 401. Oil inlet of oil cooler; 402. Oil outlet of oil cooler; 50. Three-way solenoid valve; 501. Oil inlet of three-way solenoid valve; 502. First oil outlet of three-way solenoid valve; 503. Second oil outlet of three-way solenoid valve; 60. Control module; B1. First one-way valve; B2. Second one-way valve; 70. Oil storage chamber; 701. Oil inlet of oil storage chamber; 702. Oil outlet of oil storage chamber.

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "Solution 1 and / or Solution 2" as an example, it includes solutions that are satisfied by Solution 1, or Solution 2, or Solution 1 and Solution 2 at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] The utility model provides an oil-cooled electric drive device.

[0037] See also Figure 1 In the first embodiment of the utility model, the oil-cooled electric drive device comprises:

[0038] Electric drive transmission module 10;

[0039] A mechanical oil pump 20, wherein the oil inlet 201 of the mechanical oil pump is connected to the oil outlet 102 of the electric drive transmission module 10, and the mechanical oil pump 20 is driven by the electric drive transmission module 10;

[0040] An electronic oil pump 30 , wherein an oil inlet 301 of the electronic oil pump 30 is connected to an oil outlet 202 of the mechanical oil pump 20 ;

[0041] The oil cooler 40 has an oil inlet 401 that is in communication with the oil outlet 302 of the electronic oil pump 30 , and an oil outlet 402 of the oil cooler 40 is in communication with the oil inlet 101 of the electric drive transmission module 10 .

[0042] It should be noted that the mechanical oil pump 20 is used to rotate with the rotation of the electric drive transmission module 10. It can be understood that when the electric drive transmission module 10 is powered on, the mechanical oil pump 20 is driven to work in real time. The electric drive transmission module 10, the mechanical oil pump 20, the electronic oil pump 30 and the oil cooler 40 form a circulation path, and the path is loaded with oil that can meet the cooling and lubrication requirements of the electric drive transmission module 10. The electronic oil pump 30 and the mechanical oil pump 30 are both used to drive the oil in the circulation path to circulate in the direction of passing through the oil cooler 40, the electric drive transmission module 10, the mechanical oil pump 20 and the electronic oil pump 30 in sequence, so as to cool and lubricate the electric drive transmission module 10. The oil cooler 40 is used to cool the oil flowing through.

[0043] The oil-cooled electric drive device of the utility model comprises an electric drive transmission module 10, a mechanical oil pump 20, an electronic oil pump 30 and an oil cooler 40, and the oil inlet 201 of the mechanical oil pump 20 is connected to the oil outlet 102 of the electric drive transmission module 10, the mechanical oil pump 20 is driven by the electric drive transmission module 10, the oil inlet 301 of the electronic oil pump 30 is connected to the oil outlet 202 of the mechanical oil pump 20, the oil inlet 401 of the oil cooler 40 is connected to the oil outlet 302 of the electronic oil pump 30, and the oil outlet 402 of the oil cooler 40 is connected to the oil inlet 101 of the electric drive transmission module 10.

[0044] In this way, compared with the traditional oil-cooled electric drive device in which the electronic oil pump cannot meet the cooling and lubrication needs of the electric drive transmission module due to the low temperature environment, the utility model adds a mechanical oil pump, and the electric drive transmission module drives the mechanical oil pump to work, ensuring that the mechanical oil pump can work normally when the electric drive transmission module is working, so as to meet the cooling and lubrication needs of the electric drive transmission module when the electronic oil pump cannot work normally, thereby improving the stability of the oil-cooled electric drive system.

[0045] Further, refer to Figure 2 In the second embodiment of the present utility model, the electric drive transmission module 10 includes a motor unit A1 and a reducer unit A2, and the intermediate shaft A21 of the reducer unit A2 is connected to the mechanical oil pump 20 for driving the mechanical oil pump 20 to work.

[0046] It should be noted that the electric drive transmission module 10 includes a motor unit A1 and a reducer unit A2. The motor unit A1 needs cooling oil for cooling, and the reducer unit A2 needs cooling oil for lubrication. The power source of the mechanical oil pump 20 is the intermediate shaft A21 of the reducer unit A2. The mechanical oil pump 20 is directly connected to the intermediate shaft A21 mechanically. As long as the reducer unit A2 rotates, the mechanical oil pump 20 can be driven to work.

[0047] The electric drive transmission module 10 includes a motor unit A1 and a reducer unit A2 , wherein an intermediate shaft A21 of the reducer unit A2 is connected to a mechanical oil pump for driving the mechanical oil pump 20 to rotate.

[0048] In this embodiment, the oil-cooled electric drive device further includes:

[0049] A three-way solenoid valve 50, wherein an oil inlet 501 of the three-way solenoid valve 50 is communicated with an oil outlet 202 of the mechanical oil pump 20, a first oil outlet 502 of the three-way solenoid valve 50 is communicated with an oil inlet 301 of the electronic oil pump 30, and a second oil outlet 503 of the three-way solenoid valve 50 is communicated with a communication interface between the electronic oil pump 30 and the oil cooler 40;

[0050] The control module 60 is used to control the oil inlet 501 of the three-way solenoid valve 50 to be connected with the first oil outlet 502 or the second oil outlet 503 .

[0051] The oil-cooled electric drive device also includes a three-way solenoid valve 50, which includes an oil inlet 501, a first oil outlet 502, and a second oil outlet 503. The default state of the three-way solenoid valve 50 is that the oil inlet 501 and the first oil outlet 502 are connected. The oil inlet 501 of the three-way solenoid valve 50 is connected to the oil outlet 202 of the mechanical oil pump 20, the first oil outlet 502 of the three-way solenoid valve 50 is connected to the oil inlet 301 of the electronic oil pump 30, and the second oil outlet 503 of the three-way solenoid valve 50 is connected to the connecting interface between the electronic oil pump 30 and the oil cooler 40. In addition, the oil-cooled electric drive device also includes a control module 60, which is used to control the oil inlet 501 of the three-way solenoid valve 50 to be connected to the first oil outlet 502 or the second oil outlet 503, that is, the control module 60 is used to switch the connecting passage of the three-way solenoid valve 50. In this way, when the electronic oil pump 30 fails to work normally, the control module 60 can control the oil inlet 501 to be connected to the second oil outlet 503 , that is, the mechanical oil pump 20 is used alone to provide the oil required by the electric drive transmission module 10 .

[0052] In a feasible implementation manner, the oil inlet 301 of the electronic oil pump 30 is connected to the first oil outlet 502 , and the oil inlet 301 of the electronic oil pump 30 is connected to the communication interface between the mechanical oil pump 20 and the electric drive transmission module 10 .

[0053] The oil inlet 301 of the electronic oil pump 30 is respectively connected to the first oil outlet 502 and the connecting interface of the mechanical oil pump 20 and the electric drive transmission module 10, that is, it can be understood that the oil flowing into the oil inlet 301 of the electronic oil pump 30 comes from the electric drive transmission module 10 and the mechanical oil pump 20, and the oil flowing into the oil inlet 201 of the mechanical oil pump 20 comes from the electric drive transmission module 10. In this way, the dual power of the electronic oil pump 30 and the mechanical oil pump 20 is combined to accelerate the oil circulation efficiency.

[0054] In another feasible implementation manner, the control module 60 is used to control the oil inlet 501 of the three-way solenoid valve 50 to be connected to the second oil outlet 503 when the ambient temperature is lower than a preset temperature and / or the electronic oil pump 30 fails.

[0055] It should be noted that the control module 60 may have an ambient temperature detection function, or may be connected to a temperature sensor on the vehicle in communication to obtain ambient temperature information, and control the oil inlet 501 of the three-way solenoid valve 50 to communicate with the second oil outlet 503 when the ambient temperature is detected to be lower than a preset temperature. It should be understood that the monitoring of the ambient temperature is real-time and continuous, and when the control module 60 detects that the ambient temperature is higher than a preset temperature, the three-way solenoid valve 50 is controlled to return to the default state, that is, the oil inlet 501 is connected with the first oil outlet 502. The preset temperature is the lower limit of the temperature range in which the electronic oil pump 30 can work normally. The electronic oil pump 30 has a built-in integrated controller for monitoring the working state of the electronic oil pump 30. When a fault is detected, a fault signal is sent to the control module 60, that is, the control module 60 is connected to the electronic oil pump 30. When the control module 60 determines that the electronic oil pump 30 is faulty based on the received fault signal, the oil inlet 501 and the second oil outlet 503 of the three-way solenoid valve 50 are connected. It should be understood that the fault signal sent by the electronic oil pump 30 is continuous. When the control module 60 detects that the fault signal is interrupted, the three-way solenoid valve 50 is controlled to return to the default state, that is, the oil inlet 501 is connected to the first oil outlet 502. In this way, when the electronic oil pump 30 cannot work normally due to a low temperature environment or a fault of itself, the control module 60 can control the switching of the passage in the three-way solenoid valve 50 to switch to using the mechanical oil pump 20 to provide the required oil for the electric drive transmission module 10, so as to ensure the stability of the oil cooling system.

[0056] In this embodiment, the oil-cooled electric drive device further includes:

[0057] The first one-way valve B1 is disposed on the connection passage between the electronic oil pump 30 and the oil cooler 40 , and between the electronic oil pump 30 and the second oil outlet 503 .

[0058] It should be noted that the first one-way valve B1 is used to prevent oil from flowing back to the electronic oil pump 30 when the mechanical oil pump 20 is used alone (i.e., the oil inlet 501 of the three-way solenoid valve 50 is connected to the second oil outlet 503). Specifically, the first one-way valve B1 is provided on the connection passages of the communication interfaces between the electronic oil pump 30 and the oil cooler 40, and between the electronic oil pump 30 and the second oil outlet 503.

[0059] In this embodiment, the oil-cooled electric drive device further includes:

[0060] The second one-way valve B2 is disposed on a connection passage between the second oil outlet 503 and the communication interface between the oil cooler 40 , the electronic oil pump 30 and the second oil outlet 503 .

[0061] It should be noted that the second one-way valve B2 is used to prevent the oil from flowing back to the mechanical oil pump 20 when the oil inlet 501 of the three-way solenoid valve 50 is connected to the first oil outlet 502. Specifically, the second one-way valve B2 is arranged on the connection passage between the second oil outlet 503 and the connecting interface of the oil cooler 40, the electronic oil pump 30 and the second oil outlet 503.

[0062] In this embodiment, the oil-cooled electric drive device further includes:

[0063] The oil storage chamber 70 , the oil inlet 701 of the oil storage chamber 70 is communicated with the oil outlet 102 of the electric drive transmission module 10 , and the oil outlet 702 of the oil storage chamber 70 is communicated with the oil inlet 201 of the mechanical oil pump 20 .

[0064] It should be noted that the oil storage chamber 70 is used to store oil to ensure that the oil in the circulation path can meet the cooling and lubrication requirements of the electric drive transmission module. Specifically, the oil inlet 701 of the oil storage chamber 70 is connected to the oil outlet 102 of the electric drive transmission module 10, and the oil outlet 702 of the oil storage chamber 70 is connected to the oil inlet 201 of the mechanical oil pump 20.

[0065] In this way, the utility model realizes the switching of the working oil pump by setting the three-way solenoid valve 50 and the control module 60, and improves the oil circulation efficiency when the electronic oil pump 30 and the mechanical oil pump 20 work at the same time; and ensures that the oil does not flow back by setting the one-way valve, thereby avoiding the electronic oil pump 30 and the mechanical oil pump 20 from malfunctioning due to oil backflow; and by setting the oil storage chamber 70, ensures that the excess oil in the circulation path can be stored in the oil storage chamber 70.

[0066] The utility model also proposes an oil-cooled electric drive system. The vehicle is integrated with an oil-cooled electric drive device. The specific structure of the oil-cooled electric drive device refers to the above-mentioned embodiment. Since the oil-cooled electric drive system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0067] The utility model also proposes a vehicle, which is integrated with an oil-cooled electric drive system. The specific structure of the oil-cooled electric drive system refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0068] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An oil-cooled electric drive device, characterized in that: The oil-cooled electric drive device comprises: Electric drive transmission module; A mechanical oil pump, wherein the oil inlet of the mechanical oil pump is connected to the oil outlet of the electric drive transmission module, and the mechanical oil pump is driven by the electric drive transmission module; An electronic oil pump, wherein the oil inlet of the electronic oil pump is connected to the oil outlet of the mechanical oil pump; An oil cooler, wherein the oil inlet of the oil cooler is communicated with the oil outlet of the electronic oil pump, and the oil outlet of the oil cooler is communicated with the oil inlet of the electric drive transmission module.

2. The oil-cooled electric drive device according to claim 1, characterized in that: The electric drive transmission module includes a motor unit and a reducer unit. The intermediate shaft of the reducer unit is connected to the mechanical oil pump to drive the mechanical oil pump to work.

3. The oil-cooled electric drive device according to claim 1, characterized in that: The oil-cooled electric drive device also includes: A three-way solenoid valve, wherein the oil inlet of the three-way solenoid valve is connected to the oil outlet of the mechanical oil pump, the first oil outlet of the three-way solenoid valve is connected to the oil inlet of the electronic oil pump, and the second oil outlet of the three-way solenoid valve is connected to the connecting interface of the electronic oil pump and the oil cooler; A control module, wherein the control module is used to control the oil inlet of the three-way solenoid valve to be connected to the first oil outlet or the second oil outlet.

4. The oil-cooled electric drive device according to claim 3, characterized in that: The oil inlet of the electronic oil pump is communicated with the first oil outlet, and the oil inlet of the electronic oil pump is communicated with the communication interface between the mechanical oil pump and the electric drive transmission module.

5. The oil-cooled electric drive device according to claim 3, characterized in that: The control module is used to control the oil inlet of the three-way solenoid valve to be connected to the second oil outlet when the ambient temperature is lower than a preset temperature and / or the electronic oil pump fails.

6. The oil-cooled electric drive device according to claim 4, characterized in that: The oil-cooled electric drive device also includes: A first one-way valve is provided on a connection passage between the electronic oil pump and the oil cooler, and between the electronic oil pump and the communication interface of the second oil outlet.

7. The oil-cooled electric drive device according to claim 4, characterized in that: The oil-cooled electric drive device also includes: A second one-way valve is provided on a connection passage between the second oil outlet and a communication interface between the oil cooler, the electronic oil pump and the second oil outlet.

8. The oil-cooled electric drive device according to claim 1, characterized in that: The oil-cooled electric drive device also includes: An oil storage chamber, wherein the oil inlet of the oil storage chamber is communicated with the oil outlet of the electric drive transmission module, and the oil outlet of the oil storage chamber is communicated with the oil inlet of the mechanical oil pump.

9. An oil-cooled electric drive system, characterized in that: The oil-cooled electric drive system comprises an oil-cooled electric drive device as described in any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle includes the oil-cooled electric drive system as claimed in claim 9.

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