Motor cooling system

Abstract

The invention provides a motor cooling system, and relates to the technical field of hybrid electric vehicles. The system comprises an inverter cooler, a power controller, a first water pump, an electronic oil pump, an air cooling cooler and an automatic gearbox, wherein a motor and an automatic transmission are arranged in the automatic gearbox; the motor, the inverter cooler, the power controller, the first water pump and the motor are sequentially connected through water pipes to form a first water circulation loop used for cooling the power controller and the motor through water in the inverter cooler. The automatic gearbox, the electronic oil pump, the air-cooled cooler and the automatic gearbox are sequentially connected through oil pipes to form an oil circulation loop, and the oil circulation loop is used for cooling the automatic gearbox after oil in the automatic gearbox is cooled through the air-cooled cooler. According to the method, the motor in the automatic gearbox is cooled in an oil cooling and water cooling combined mode, the size of the motor cooling system is reduced, and the cost of the motor cooling system is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid electric vehicles, and in particular to a motor cooling system. Background Art

[0002] In hybrid vehicles, the automatic transmission usually contains the electric motor and the automatic transmission. Effectively cooling the electric motor within the automatic transmission is critical to improving the efficiency of the motor and overall vehicle performance.

[0003] In the prior art, the motor is usually cooled by an oil cooling solution, that is, the motor in the automatic transmission is cooled by a mechanical oil pump (Mechanical Oil Pump, MOP) and an electronic oil pump (Electronic Oil Pump, EOP).

[0004] However, the mechanical oil pump needs to deliver the cooling lubricating oil to various components such as gears, bearings and motors through the hydraulic module. Since the hydraulic module is usually large in size, the traditional motor cooling system has the disadvantages of being large in size and high in cost. Summary of the invention

[0005] The present application provides a motor cooling system, which is used to reduce the volume of the motor cooling system and reduce the cost of the motor cooling system.

[0006] In a first aspect, the present application provides a motor cooling system, the system comprising:

[0007] Inverter cooler, power controller, first water pump, electronic oil pump, air-cooled cooler, automatic transmission, the automatic transmission includes a motor and an automatic transmission;

[0008] The motor, the inverter cooler, the power controller, the first water pump, and the motor are connected in sequence through water pipes to form a first water circulation loop for cooling the power controller and the motor through water in the inverter cooler;

[0009] The automatic transmission, the electronic oil pump, the air-cooled cooler, and the automatic transmission are connected in sequence through oil pipes to form an oil circulation loop for cooling the oil in the automatic transmission through the air-cooled cooler and then cooling the automatic transmission.

[0010] In a possible design, the automatic transmission has the following two motors: a generator motor and a drive motor. In the first water circulation loop, water output by the first water pump passes through the generator motor and the drive motor in sequence and reaches the inverter cooler.

[0011] In one possible design, in the oil circulation loop, the oil output from the air-cooled cooler is simultaneously delivered to the drive motor, the generator motor and the automatic transmission, and the oil output from the drive motor, the generator motor and the automatic transmission is then delivered to the electronic oil pump.

[0012] In a possible design, a first temperature control valve is arranged between the air-cooled cooler and the automatic transmission, and a second temperature control valve is arranged between the electronic oil pump and the air-cooled cooler. When the first temperature control valve and the second temperature control valve are opened, the automatic transmission can be cooled through the oil circulation loop.

[0013] In one possible design, the motor includes: a stator core, a stator winding package embedded in the stator core, an oil injection pipe is provided on the outside of the stator core and the stator winding package, the oil injection pipe is connected to an air-cooled cooler, and the oil injection pipe is provided with an oil injection port for spraying oil to the outside of the stator winding package for cooling, and the outside of the stator winding package is the side away from the rotor core.

[0014] In a possible design, the motor further includes: a shell arranged outside the stator core, the shell and the stator core are heat-conductively connected, and a water channel is arranged outside the shell, and the water channel is used to cool the shell.

[0015] In one possible design, the housing and the stator core are interference fit.

[0016] In a possible design, the water channel of the generator motor is connected to the first water pump, and the water channel of the drive motor is connected to the generator motor.

[0017] In a possible design, the motor also includes: a rotor core, a rotor shaft, and oil-flinging pipes are provided inside the rotor shaft and the rotor core. The oil-flinging pipes are connected to an air-cooled cooler and are used to fling the oil in the oil circulation loop into the inner side of the stator winding package through the oil-flinging pipes when the rotor shaft rotates, so as to cool the inner side of the stator winding package, and the inner side of the stator winding package is the side close to the rotor core.

[0018] In one possible design, the system also includes: an engine and an engine radiator, a second water pump is arranged in the engine, the second water pump, the engine radiator and the engine are connected in sequence through water pipes to form a second water circulation loop for cooling the engine through the water in the engine radiator.

[0019] The present application provides a motor cooling system, which includes: an inverter cooler, a power controller, a first water pump, an electronic oil pump, an air-cooled cooler, and an automatic transmission, wherein the automatic transmission includes a motor and an automatic transmission; the motor, the inverter cooler, the power controller, the first water pump, and the motor are connected in sequence through water pipes to form a first water circulation loop, which is used to cool the power controller and the motor through the water in the inverter cooler; the automatic transmission, the electronic oil pump, the air-cooled cooler, and the automatic transmission are connected in sequence through oil pipes to form an oil circulation loop, which is used to cool the oil in the automatic transmission after cooling it down through the air-cooled cooler. The following technical effects are achieved: by making full use of the water in the inverter cooler to cool the motor, the cooling efficiency of the motor is improved; by making the motor and the power controller share a cooling system, that is, using the water in the inverter cooler for cooling and cooling, the space of the cooling system can be saved, thereby reducing the volume of the cooling system, and reducing the production and subsequent maintenance costs of the cooling system, as well as reducing the complexity and number of parts of the cooling system; by using the existing inverter cooler, the heat distribution inside the cooling system can be better controlled to ensure that both the power controller and the motor can work within a suitable temperature range, thereby improving the overall performance and reliability of the vehicle; by using the existing air-cooled cooler in the vehicle to cool and cool the oil instead of using a dedicated air-cooled device to cool and cool the oil, the number of redundant devices in the cooling system is reduced, thereby further reducing the volume of the motor cooling system; by cooling the motor in the automatic transmission by a combination of oil cooling and water cooling, and using only one electronic oil pump to replace the mechanical oil pump and the electronic oil pump in the traditional cooling system, the volume of the motor cooling system is significantly reduced and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 A schematic diagram of a motor cooling system provided in an embodiment of the present application Figure 1 ;

[0023] Figure 2 A schematic diagram of a motor cooling system provided in an embodiment of the present application Figure 2 ;

[0024] Figure 3 A schematic diagram of the structure of a motor cooling part in a motor cooling system provided in an embodiment of the present application.

[0025] Reference numerals:

[0026] 10-inverter cooler; 20-power controller; 30-first water pump; 40-electronic oil pump; 50-air cooling cooler; 60-automatic transmission; 70-engine; 80-engine radiator; 510-first temperature control valve; 520-second temperature control valve; 610-motor; 611-generator motor; 612-drive motor; 620-automatic transmission; 710-second water pump;

[0027] 601- stator core; 602- stator winding package; 603- oil injection pipe; 604- oil injection port; 605- rotor core; 606- housing; 607- water channel; 608- rotor shaft; 609- oil throwing pipe. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0029] In the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will appreciate that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way. In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more.

[0030] It should be noted that the "at..." in the embodiments of the present application can be the instant when a certain situation occurs, or can be a period of time after a certain situation occurs, and the embodiments of the present application do not specifically limit this. In addition, the motor cooling system provided in the embodiments of the present application is only used as an example, and a motor cooling system can also include more or less content.

[0031] In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0032] Interference fit: It is a mechanical connection method that achieves a tight connection through interference between parts (i.e. the size of one part is slightly larger than the inner hole of the other part). Interference fit allows the actual sizes of the two parts to fit tightly during assembly and generates a certain amount of pressure. This fit method relies on the elastic deformation of the parts. The parts need to be elastically compressed or expanded during assembly. After assembly, the contact pressure between the parts will generate a certain amount of friction, thereby ensuring a firm connection between the mating parts and heat transfer.

[0033] The automatic transmission of a hybrid vehicle integrates the motor and automatic transmission, so effective cooling of the motor in the automatic transmission is crucial to improving motor efficiency and overall vehicle performance.

[0034] In existing hybrid vehicles, the cooling of the motor in the automatic transmission mainly relies on the oil cooling solution, that is, the cooling is achieved by combining a mechanical oil pump with an electronic oil pump. This method relies on the coordinated work of the mechanical oil pump and the electronic oil pump, which can effectively improve the working efficiency of the motor and thus enhance the overall performance of the vehicle.

[0035] However, there is a significant problem with the traditional motor cooling system: since the mechanical oil pump needs to use a large hydraulic module to transport the cooling lubricating oil to key components such as gears, bearings and motors, it not only increases the space occupied by the entire motor cooling system, but also leads to an increase in its cost, making the entire cooling system bulky and costly.

[0036] Based on this, the embodiment of the present application proposes a motor cooling system that can be used in the field of hybrid vehicle technology, aiming to solve the above technical problems of the prior art, and is used to cool the motor in the automatic transmission by a combination of oil cooling and water cooling, and only one electronic oil pump is used to replace the mechanical oil pump and the electronic oil pump in the traditional cooling system, thereby significantly reducing the volume of the motor cooling system and reducing production costs, while ensuring the cooling effect of the motor. In addition, the water in the embodiment of the present application refers to cooling water used to cool components such as motors; the oil refers to lubricating oil used to cool components such as motors.

[0037] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0038] Figure 1 A schematic diagram of a motor cooling system provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, the motor cooling system includes:

[0039] The inverter cooler 10 , the power controller 20 , the first water pump 30 , the electronic oil pump 40 , the air-cooled cooler 50 , and the automatic transmission 60 . The automatic transmission 60 includes a motor 610 and an automatic transmission 620 .

[0040] The motor 610 , the inverter cooler 10 , the power controller 20 , the first water pump 30 , and the motor 610 are connected in sequence through water pipes to form a first water circulation loop for cooling the power controller 20 and the motor 610 through the water in the inverter cooler 10 .

[0041] Specifically, the inverter cooler 10 is a device specifically used to cool the inverter (i.e., the power controller 20) in an electric vehicle or hybrid electric vehicle. The power controller 20 in these vehicles is responsible for converting the direct current (DC) provided by the battery into the alternating current (AC) required by the motor, which is used to drive the motor and perform energy management. The power controller 20 generates a large amount of heat during operation. If it is not cooled in time, it may cause the power controller 20 to overheat, thereby affecting its working efficiency, performance and life, and even causing damage. Generally, the main function of the inverter cooler 10 is to ensure that the power controller 20 maintains a suitable temperature while working efficiently. In this embodiment, the power controller 20 is cooled by water cooling, that is, the water in the first water circulation loop is circulated by the first water pump 30, and the heat generated by the power controller 20 is taken away by the circulating water and transferred to the external environment, thereby maintaining the stable operation of the power controller 20 and ensuring the safety and reliability of the vehicle.

[0042] In the prior art, the water circulation loop is formed by connecting the inverter cooler 10, the power controller 20, the first water pump 30, and the inverter cooler 10 in sequence through water pipes. The water circulation loop can only be used to cool the power controller 20. Specifically, the first water pump 30 draws water from the inverter cooler 10 to cool the power controller 20, and after cooling the power controller 20, the water is returned to the inverter cooler 10.

[0043] In the embodiment of the present application, on the basis of the existing water circulation loop, the motor 610, the inverter cooler 10, the power controller 20, the first water pump 30, and the motor 610 are sequentially connected through water pipes to form a first water circulation loop. After cooling the power controller 20, the water in the inverter cooler 10 can flow through the motor 610 through the water pipe to continue cooling the motor 610, and after cooling the motor 610, the water is sent back to the inverter cooler 10. By making full use of the water in the inverter cooler 10 to cool the motor 610, the cooling efficiency of the motor 610 is improved; by making the motor 610 and the power controller 20 share a cooling system, that is, using the water in the inverter cooler 10 for cooling, the space of the cooling system can be saved, thereby reducing the volume of the cooling system, and reducing the production and subsequent maintenance costs of the cooling system, as well as reducing the complexity of the cooling system and the number of parts; by utilizing the existing inverter cooler 10, the heat distribution inside the cooling system can be better controlled to ensure that both the power controller 20 and the motor 610 can operate within a suitable temperature range, thereby improving the overall performance and reliability of the vehicle.

[0044] The oil cooling method includes: the automatic transmission 60, the electronic oil pump 40, the air-cooled cooler 50, and the automatic transmission 60 are connected in sequence through oil pipes to form an oil circulation loop, which is used to cool the oil in the automatic transmission 60 through the air-cooled cooler 50 and then cool the automatic transmission 60.

[0045] Specifically, in the prior art, the motor 610 can be cooled by a mechanical oil pump meshed with the output gear of the automatic transmission 60, or by an electronic oil pump 40. The electronic oil pump 40 delivers oil to a dedicated air-cooling device, cools the oil, and then provides the oil to the motor 610 to cool the motor 610.

[0046] In the embodiment of the present application, an oil circulation loop is formed by connecting the automatic transmission 60, the electronic oil pump 40, the air-cooled cooler 50, and the automatic transmission 60 in sequence through oil pipes. The electronic oil pump 40 delivers the oil in the automatic transmission 60 to the existing air-cooled cooler 50 in the vehicle, and after the oil is cooled by the air-cooled cooler 50, it is delivered to the motor 610 and the automatic transmission 620 to cool the motor 610 and the automatic transmission 620 by oil cooling.

[0047] By using the existing air-cooled cooler 50 in the vehicle to cool the oil instead of using a dedicated air-cooled device to cool the oil, the number of redundant devices in the cooling system is reduced, thereby further reducing the size of the motor cooling system; the motor in the automatic transmission is cooled by a combination of oil cooling and water cooling, and only one electronic oil pump 40 is used to replace the mechanical oil pump and the electronic oil pump in the traditional cooling system, which significantly reduces the size of the motor cooling system and reduces production costs.

[0048] The present embodiment provides a motor cooling system, which includes: an inverter cooler, a power controller, a first water pump, an electronic oil pump, an air-cooled cooler, and an automatic transmission, wherein the automatic transmission includes a motor and an automatic transmission; the motor, the inverter cooler, the power controller, the first water pump, and the motor are sequentially connected through water pipes to form a first water circulation loop for cooling the power controller and the motor through the water in the inverter cooler; the automatic transmission, the electronic oil pump, the air-cooled cooler, and the automatic transmission are sequentially connected through oil pipes to form an oil circulation loop for cooling the oil in the automatic transmission through the air-cooled cooler and then cooling the automatic transmission. The following technical effects are achieved: by making full use of the water in the inverter cooler to cool the motor, the cooling efficiency of the motor is improved; by making the motor and the power controller share a cooling system, that is, using the water in the inverter cooler for cooling and cooling, the space of the cooling system can be saved, thereby reducing the volume of the cooling system, and reducing the production and subsequent maintenance costs of the cooling system, as well as reducing the complexity and number of parts of the cooling system; by using the existing inverter cooler, the heat distribution inside the cooling system can be better controlled to ensure that both the power controller and the motor can work within a suitable temperature range, thereby improving the overall performance and reliability of the vehicle; by using the existing air-cooled cooler in the vehicle to cool and cool the oil instead of using a dedicated air-cooled device to cool and cool the oil, the number of redundant devices in the cooling system is reduced, thereby further reducing the volume of the motor cooling system; by cooling the motor in the automatic transmission by a combination of oil cooling and water cooling, and using only one electronic oil pump to replace the mechanical oil pump and the electronic oil pump in the traditional cooling system, the volume of the motor cooling system is significantly reduced and the production cost is reduced.

[0049] The following is a detailed description of the internal structure of the automatic transmission 60, the oil circulation loop, and the specific structure of the second water circulation loop in the motor cooling system.

[0050] Figure 2 A schematic diagram of a motor cooling system provided in an embodiment of the present application Figure 2 In one possible example, Figure 2 As shown, in this embodiment Figure 1Based on the embodiment, the internal structure of the automatic transmission 60, the oil circulation circuit, and the specific structure of the second water circulation circuit are described in detail.

[0051] like Figure 2 As shown, the automatic transmission has the following two motors: a generator motor 611 and a drive motor 612 . In the first water circulation loop, the water output by the first water pump 30 passes through the generator motor 611 and the drive motor 612 in sequence and reaches the inverter cooler 10 .

[0052] Specifically, in a hybrid vehicle, the motor 610 specifically includes a generator motor 611 and a drive motor 612. In the water cooling scheme in which the motor cooling system uses the water in the inverter cooler 10 to cool the motor 610, multiple water cycles may be included, and each water cycle includes: the first water pump 30 draws water from the inverter cooler 10 to first cool the power controller 20, then cool the generator motor 611, and then cool the drive motor 612, and after the cooling of the drive motor 612 is completed, the water is sent back to the inverter cooler 10 for cooling to prepare for the next water cycle.

[0053] In the oil circulation loop, the oil output by the air-cooled cooler 50 is simultaneously delivered to the drive motor 612 , the generator motor 611 and the automatic transmission 620 , and the oil output by the drive motor 612 , the generator motor 611 and the automatic transmission 620 is then delivered to the electronic oil pump 40 .

[0054] Specifically, the oil circulation loop may include multiple oil cycles, each of which includes: the electronic oil pump 40 first delivers the oil in the automatic transmission 60 to the air-cooled cooler 50 for cooling, and after the oil is cooled by the air-cooled cooler 50, it is simultaneously delivered to the drive motor 612, the generator motor 611 and the automatic transmission 620 to cool the three devices by oil cooling. The oil after cooling the drive motor 612, the generator motor 611 and the automatic transmission 620 is finally delivered to the electronic oil pump 40, and then the oil is sent back to the air-cooled cooler 50 for cooling through the electronic oil pump 40, in preparation for the next oil cycle.

[0055] A first temperature control valve 510 is provided between the air-cooled cooler 50 and the automatic transmission 60, and a second temperature control valve 520 is provided between the electronic oil pump 40 and the air-cooled cooler 50. When the first temperature control valve 510 and the second temperature control valve 520 are opened, the automatic transmission 60 can be cooled through the oil circulation loop.

[0056] Specifically, a temperature control valve may be provided in the oil circulation loop, and the temperature of the oil in the oil circulation loop may be automatically sensed by a temperature sensing element (such as a thermistor or a bimetallic strip, etc.) built into the temperature control valve, and the opening of the temperature control valve may be adjusted according to the temperature value of the oil, thereby controlling the temperature of the oil in the oil circulation loop. Specifically, a second temperature control valve 520 is provided between the electronic oil pump 40 and the air-cooled cooler 50, and the second temperature control valve 520 is used to control whether the motor cooling system cools the oil through the air-cooled cooler 50. For example, when the second temperature control valve 520 detects that the temperature of the oil is greater than the first preset temperature threshold, the second temperature control valve 520 is opened to cool the oil through the air-cooled cooler 50. A first temperature control valve 510 may also be provided between the air-cooled cooler 50 and the automatic transmission 60. The first temperature control valve 510 is used to detect whether the air-cooled cooler 50 has effectively cooled the oil. When the first temperature control valve 510 detects that the temperature of the oil is lower than the second preset temperature threshold, the first temperature control valve 510 is opened to cool the drive motor 612, the generator motor 611 and the automatic transmission 620 in the automatic transmission 60 through the oil cooled by the air-cooled cooler 50. The first preset temperature threshold is greater than the second preset temperature threshold.

[0057] Furthermore, the system also includes: an engine 70 and an engine radiator 80, a second water pump 710 is arranged in the engine 70, and the second water pump 710, the engine radiator 80, and the engine 70 are connected in sequence through water pipes to form a second water circulation loop for cooling the engine 70 through the water in the engine radiator 80.

[0058] Specifically, the second water pump 710 is used to pump water from the engine radiator 80 and deliver it to the engine 70 to cool the engine 70. After cooling the engine 70, the water is delivered back to the engine radiator 80.

[0059] An embodiment of the present application provides a motor cooling system, in which a second temperature control valve is arranged between an electronic oil pump and an air-cooled cooler, and whether the motor cooling system cools the oil through the air-cooled cooler is controlled by the second temperature control valve. When the second temperature control valve detects that the temperature of the oil is greater than a first preset temperature threshold, the second temperature control valve is opened to cool the oil through the air-cooled cooler; a first temperature control valve is arranged between the air-cooled cooler and the automatic transmission, and the first temperature control valve is used to detect whether the air-cooled cooler has effectively cooled the oil. When the first temperature control valve detects that the temperature of the oil is less than the second preset temperature threshold, the first temperature control valve is opened to cool the drive motor, the generator motor and the automatic transmission in the automatic transmission through the oil cooled by the air-cooled cooler, and the opening of the temperature control valve is adjusted according to the temperature value of the oil, thereby realizing the control of the temperature of the oil in the oil circulation loop.

[0060] Next, we will introduce in detail how to cool the various components inside the motor.

[0061] Figure 3 The schematic diagram of the structure of the motor cooling part in a motor cooling system provided in an embodiment of the present application. Figure 3 As shown, in this embodiment Figure 1 Based on the embodiments, how to cool various components inside the motor is described in detail.

[0062] like Figure 3 As shown, the motor 610 includes: a stator core 601, a stator winding package 602 embedded in the stator core 601, an oil injection pipe 603 is provided on the outside of the stator core 601 and the stator winding package 602, the oil injection pipe 603 is connected to the air-cooled cooler 50, and the oil injection pipe 603 is provided with an oil injection port 604 for spraying oil to the outside of the stator winding package 602 for cooling, and the outside of the stator winding package 602 is the side away from the rotor core 605.

[0063] Specifically, for the stator coil 602 which is difficult to dissipate heat inside the motor 610, in the embodiment of the present application, oil cooling is adopted for cooling. Specifically, the outer side of the stator coil 602 is cooled by spraying oil through the oil spray pipe 603, that is, the outer side of the stator coil 602 is cooled by spraying oil through multiple oil spray ports 604 on multiple oil spray pipes 603.

[0064] The motor 610 further includes: a housing 606 disposed outside the stator core 601, the housing 606 and the stator core 601 are heat-conductively connected, a water channel 607 is disposed outside the housing 606, and the water channel 607 is used to cool the housing 606. The housing 606 and the stator core 601 are interference fit.

[0065] Specifically, in the embodiment of the present application, the stator core 601 inside the motor 610 is cooled by water. Specifically, the stator core 601 can transfer heat to the housing 606 matched therewith, and the housing 606 can dissipate heat through the water channel 607, thereby indirectly cooling the stator core 601 inside the motor 610.

[0066] Furthermore, since the stator core 601 and the housing 606 are in interference fit, the heat of the stator core 601 can be more fully transferred to the housing 606, so that the effect of cooling the stator core 601 by water cooling can be more fully achieved.

[0067] The water passage 607 of the generator motor 611 is connected to the first water pump 30 , and the water passage 607 of the driving motor 612 is connected to the generator motor 611 .

[0068] Specifically, the water channel 607 outside the generator motor 611 can be directly connected to the first water pump 30 to cool the generator motor 611 directly through the water in the inverter cooler 10. The water channel of the drive motor 612 is connected to the water channel of the generator motor 611, that is, the water in the first water circulation loop, after cooling the generator motor 611, can continue to flow to the water channel outside the drive motor 612 to continue cooling the drive motor 612.

[0069] The motor 610 also includes: a rotor core 605 and a rotor shaft 608. An oil-slinging pipe 609 is provided inside the rotor shaft 608 and the rotor core 605. The oil-slinging pipe 609 is connected to the air-cooled cooler 50 and is used to swing the oil in the oil circulation loop into the inner side of the stator winding package 602 through the oil-slinging pipe 609 when the rotor shaft 608 rotates, so as to cool the inner side of the stator winding package 602. The inner side of the stator winding package 602 is the side close to the rotor core 605.

[0070] Specifically, the inner side of the stator winding package 602 is cooled by oil throwing from the rotor shaft 608. Specifically, the center of the rotor core 605 and the rotor shaft 608 are both penetrated by an oil throwing pipe 609. One end of the oil throwing pipe 609 is connected to the inner side of the stator winding package 602, and the other end of the oil throwing pipe 609 can be connected to the air-cooled cooler 50, so that when the rotor shaft 608 rotates, the oil in the oil circulation loop can be thrown into the inner side of the stator winding package 602 through the oil throwing pipe 609, so as to achieve the effect of cooling the inner side of the stator winding package 602 by oil cooling.

[0071] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor cooling system, characterized in that: include: Inverter cooler, power controller, first water pump, electronic oil pump, air-cooled cooler, automatic transmission, the automatic transmission includes a motor and an automatic transmission; The motor, the inverter cooler, the power controller, the first water pump, and the motor are sequentially connected through water pipes to form a first water circulation loop for cooling the power controller and the motor through water in the inverter cooler; The automatic transmission, the electronic oil pump, the air-cooled cooler, and the automatic transmission are sequentially connected through oil pipes to form an oil circulation loop for cooling the oil in the automatic transmission through the air-cooled cooler and then cooling the automatic transmission.

2. The system according to claim 1, characterized in that The automatic transmission has the following two motors: a generator motor and a drive motor. In the first water circulation loop, water output by the first water pump passes through the generator motor and the drive motor in sequence and reaches the inverter cooler.

3. The system according to claim 2, characterized in that In the oil circulation loop, the oil output by the air-cooled cooler is simultaneously delivered to the drive motor, the generator motor and the automatic transmission, and the oil output by the drive motor, the generator motor and the automatic transmission is then delivered to the electronic oil pump.

4. The system according to claim 3, characterized in that A first temperature control valve is arranged between the air-cooled cooler and the automatic transmission, and a second temperature control valve is arranged between the electronic oil pump and the air-cooled cooler. When the first temperature control valve and the second temperature control valve are opened, the automatic transmission can be cooled through the oil circulation loop.

5. The system according to any one of claims 2 to 4, characterized in that The motor includes: a stator core, a stator winding package embedded in the stator core, an oil injection pipe is arranged on the outside of the stator core and the stator winding package, the oil injection pipe is connected to the air-cooled cooler, and the oil injection pipe is provided with an oil injection port for spraying oil to the outside of the stator winding package for cooling, and the outside of the stator winding package is the side away from the rotor core.

6. The system according to claim 5, characterized in that The motor further comprises: a shell arranged outside the stator core, the shell and the stator core are heat-conductively connected, a water channel is arranged outside the shell, and the water channel is used to cool the shell.

7. The system according to claim 6, characterized in that The housing and the stator core are interference fit.

8. The system according to claim 6, characterized in that The water channel of the generator motor is connected to the first water pump, and the water channel of the drive motor is connected to the generator motor.

9. The system according to claim 5, characterized in that The motor also includes: a rotor core and a rotor shaft. The rotor shaft and the rotor core are both provided with oil-slinging pipes. The oil-slinging pipes are connected to the air-cooled cooler and are used to swing the oil in the oil circulation loop into the inner side of the stator winding package through the oil-slinging pipe when the rotor shaft rotates, so as to cool the inner side of the stator winding package. The inner side of the stator winding package is the side close to the rotor core.

10. The system according to any one of claims 1 to 4, characterized in that The system also includes: an engine and an engine radiator, wherein a second water pump is arranged in the engine, and the second water pump, the engine radiator and the engine are connected in sequence through water pipes to form a second water circulation loop for cooling the engine through the water in the engine radiator.

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