Cooling device, motor, vehicle, cooling method and control method of motor

Abstract

A cooling device, a motor, a vehicle, a cooling method and a control method of the motor, the cooling device comprises a shell part and a heat conduction piece, the shell part comprises a cooling cavity and a to-be-cooled space, the cooling cavity is used for cooling the to-be-cooled space, the cooling cavity is provided with an air inlet end and an air outlet end which are communicated with the outside, and the air inlet end is used for air in the cooling cavity to enter; the exhaust end is used for exhausting gas in the cooling cavity; the heat conduction piece is arranged between the air inlet end and the air outlet end. According to the air cooling device, the cooling cavity is formed in the shell part, the cooling cavity is provided with the air inlet end and the air outlet end which are communicated with the outside, air enters the cooling cavity through the air inlet end, the air in the cooling cavity is exhausted through the air outlet end, and therefore air cooling is achieved; and the heat conduction piece is arranged between the air inlet end and the air outlet end, an active heat dissipation cooling scheme is provided, air cooling and active heat dissipation are combined, the cooling effect on parts contained in the space to be cooled is effectively improved, and the heat dissipation capacity is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a cooling device, a motor, a vehicle, a cooling method, and a control method for the motor. Background Technology

[0002] Cooling technology for motors and other components in new energy vehicles is receiving increasing attention. Common cooling methods include natural cooling, water cooling, air cooling, and oil cooling. Natural cooling is a passive heat dissipation method; while water cooling, air cooling, and oil cooling are active heat dissipation methods, their heat dissipation capacity is limited. In summary, the existing cooling technologies have poor cooling effects, resulting in insufficient heat dissipation capacity for motors and other components, affecting their operating efficiency, and also posing safety risks. Summary of the Invention

[0003] The purpose of this application is to provide a cooling device, motor, vehicle, cooling method, and motor control method to solve the problem of insufficient heat dissipation capacity of motors and other components.

[0004] To achieve the objectives of this application, the following technical solution is provided:

[0005] In a first aspect, this application provides a cooling device, comprising:

[0006] A housing component, the housing component including a cooling chamber and a space to be cooled, the cooling chamber being used to cool the space to be cooled, the cooling chamber having an air inlet end and an air outlet end communicating with the outside, the air inlet end being used for gas to enter the cooling chamber, and the air outlet end being used for gas to exit the cooling chamber;

[0007] A heat-conducting component is disposed between the air inlet end and the air outlet end.

[0008] In one embodiment, at least one of the heat-conducting element, the air inlet end, and the exhaust end is multiple, and the heat-conducting element is provided corresponding to at least one of the air inlet end and the exhaust end.

[0009] In one embodiment, the inner wall of the housing component forms the space to be cooled, and the cooling cavity is arranged around the space to be cooled.

[0010] In one embodiment, multiple heat-conducting components, multiple air inlets, and multiple air outlets are provided, and at least one of the multiple heat-conducting components, multiple air inlets, and multiple air outlets is arranged around the space to be cooled.

[0011] In one embodiment, the heat-conducting component includes a support frame and a heat-conducting pipe, the support frame extending radially along the housing component, and the heat-conducting pipe fixed to the support frame.

[0012] In one embodiment, a plurality of heat pipes are provided, and the plurality of heat pipes are spaced apart in the axial and / or radial direction of the housing component;

[0013] The exhaust end is provided in multiple ways, and the multiple heat-conducting pipes are provided corresponding to the multiple exhaust ends.

[0014] In one embodiment, the cooling device further includes a fan disposed at the air intake end.

[0015] In one embodiment, multiple fans are provided, and the multiple fans are arranged around the space to be cooled;

[0016] The air intake end is provided with multiple air intake ends, and multiple fans are provided corresponding to multiple air intake ends.

[0017] In one embodiment, the air inlet and the air outlet are respectively located at both ends of the housing component along the axial direction; the air inlet is configured as a first air inlet, and the air outlet is configured as an air outlet.

[0018] In one embodiment, the cooling device further includes an air supply component, which is connected to the air inlet and is used to supply cold air to the cooling chamber.

[0019] In one embodiment, the air supply component includes a compressor and a vortex tube. The vortex tube includes a second air inlet and a cold air outlet. The compressor is connected to the second air inlet, and the cold air outlet is connected to the air inlet.

[0020] In one embodiment, the air supply component further includes an air pipe, which includes a main pipe and multiple branch pipes. One end of the main pipe is connected to the cold air outlet, and the other end of the main pipe is connected to the multiple branch pipes. Multiple air inlets are provided, and the multiple branch pipes are connected to the multiple air inlets one by one.

[0021] In one embodiment, the housing component includes a first housing and a second housing, the first housing enclosing the space to be cooled, the second housing being fitted onto the first housing, and the second housing and the first housing forming the cooling cavity; the heat-conducting element is connected to the first housing and / or the second housing.

[0022] In one embodiment, the support frame is connected to the first housing at one end along the radial direction of the housing component.

[0023] Secondly, this application also provides an electric motor, including a stator and a cooling device as described in the first aspect, wherein the stator is disposed within the cooling device.

[0024] Thirdly, this application also provides a vehicle including the electric motor as described in the second aspect.

[0025] Fourthly, this application also provides a cooling method applied to the cooling apparatus as described in the first aspect, the cooling method comprising:

[0026] Adjust the cooling mode of the cooling device according to the cooling requirements of the space to be cooled.

[0027] In one embodiment, the cooling device further includes a fan and an air supply component, and the cooling mode of the cooling device is adjusted according to the cooling requirements of the space to be cooled, including at least one of the following:

[0028] When the cooling requirement of the space to be cooled is at level one, the fan and the air supply component are started simultaneously.

[0029] If the cooling requirement of the space to be cooled is a secondary requirement, start the fan and turn off the air supply component; or, start the air supply component and turn off the fan.

[0030] When the cooling requirement of the space to be cooled is level three, the fan and the air supply component are turned off simultaneously.

[0031] The cooling requirements corresponding to the first-level demand, the second-level demand, and the third-level demand decrease sequentially.

[0032] In one embodiment, when the cooling demand of the space to be cooled is at a high level, the fan and the air supply component are started simultaneously, and both the fan and the air supply component run at full speed.

[0033] When the cooling demand of the space to be cooled is at a low level, the fan and the air supply component are started simultaneously, and at least one of the fan and the air supply component operates at a reduced speed.

[0034] The cooling requirements corresponding to the first-level high demand and the first-level low demand decrease sequentially.

[0035] In one embodiment, when the cooling demand of the space to be cooled is at level two high demand, the fan or the air supply component is started and the fan or the air supply component runs at full speed;

[0036] When the cooling requirement of the space to be cooled is at level two low requirement, the fan or the air supply component is started, and the fan or the air supply component moves at a reduced speed.

[0037] The cooling requirements corresponding to the second-level high demand and the second-level low demand decrease sequentially.

[0038] Fifthly, this application also provides a method for controlling an electric motor, including: a cooling method as described in the fourth aspect, wherein the electric motor is disposed within the space to be cooled.

[0039] In one embodiment, the first-level requirement is that the motor operates at a speed greater than 4000 RPM, the second-level requirement is that the motor operates at a speed less than 4000 RPM, and the third-level requirement is that the motor is idling.

[0040] In one embodiment, when the cooling demand of the space to be cooled is at a high level, the fan and the air supply component are started simultaneously, and both the fan and the air supply component run at full speed.

[0041] When the cooling demand of the space to be cooled is at a low level, the fan and the air supply component are started simultaneously, and at least one of the fan and the air supply component operates at a reduced speed.

[0042] The first-level high demand refers to the motor operating at a speed greater than 8000 RPM, and the first-level low demand refers to the motor operating at a speed between 4000 RPM and 8000 RPM.

[0043] In one embodiment, when the cooling demand of the space to be cooled is at level two high demand, the fan or the air supply component is started and the fan or the air supply component runs at full speed;

[0044] When the cooling requirement of the space to be cooled is at level two low requirement, the fan or the air supply component is started, and the fan or the air supply component moves at a reduced speed.

[0045] The secondary high demand refers to the motor operating at a speed of 2000 RPM to 4000 RPM, and the secondary low demand refers to the motor operating at a speed of less than 2000 RPM.

[0046] In this application, the housing component includes a cooling cavity and a space to be cooled. The cooling cavity has an air inlet end and an exhaust end that are connected to the outside. Gas enters the cooling cavity through the air inlet end and is discharged from the cooling cavity through the exhaust end, thereby achieving gas cooling. Furthermore, a heat-conducting component is provided between the air inlet end and the exhaust end, providing an active heat dissipation cooling solution. By combining gas cooling and active heat dissipation, the cooling effect on the components housed in the space to be cooled is effectively improved, thereby enhancing the heat dissipation capacity. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a perspective view of an electric motor according to one embodiment of this application;

[0049] Figure 2 for Figure 1 Exploded view;

[0050] Figure 3 for Figure 1 The main view;

[0051] Figure 4 for Figure 3 AA section view;

[0052] Figure 5 This is a partial exploded view of a cooling device according to one embodiment of this application;

[0053] Figure 6 This is a perspective view of the first housing and fan according to one embodiment of this application;

[0054] Figure 7 This is a perspective view of the second housing according to one embodiment of this application;

[0055] Figure 8 A flowchart illustrating a cooling method according to one embodiment of this application;

[0056] Figure 9 This is a flowchart of step S100 of one embodiment of this application;

[0057] Figure 10 This is a flowchart of step S110 of one embodiment of this application;

[0058] Figure 11 This is a flowchart of step S120 of one embodiment of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 100. Stator; 110. Stator core; 120. Stator winding; 200. Rotor; 300. Housing components; 310. Cooling space; 320. Cooling chamber; 330. Inlet end; 340. Exhaust end; 350. First housing; 351. First end plate; 360. Second housing; 361. Second end plate; 370. End cover; 400. Air supply components; 410. Compressor; 420. Swirl tube; 421. Inlet end pipe; 422. Cold air end pipe; 423. Hot air end pipe; 430. Air pipe; 431. Main pipe; 432. Branch pipe; 500. Heat-conducting component; 510. Support frame; 520. Heat-conducting pipe; 600. Fan. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0063] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0064] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0065] Vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles. For pure electric vehicles or hybrid electric vehicles, the powertrain is a crucial component. The powertrain is mounted on the vehicle's frame and includes an electric motor, a reducer, and a battery. The battery provides power to the electric motor, which transmits power to the wheels through the reducer and half-shafts to drive the vehicle.

[0066] refer to Figure 1 and Figure 2This application provides an electric motor, which includes a cooling device, a stator 100, and a rotor 200. The stator 100 is the stationary part of the motor, and the rotor 200 is housed within the stator 100. The stator 100 includes a stator core 110 and a stator winding 120, which is wound around the stator core 110. The main function of the stator 100 is to generate a rotating magnetic field, and the main function of the rotor 200, which cooperates with the stator 100, is to rotate under the influence of the rotating magnetic field. During motor operation, the stator winding 120 generates heat when energized, and the stator core 110 is subjected to an alternating magnetic field during operation, resulting in magnetization and demagnetization processes. These processes generate eddy current losses and residual magnetism losses, thus generating heat. The rotor 200, as the rotating part of the motor, is also subjected to electromagnetic fields and mechanical friction during motor operation, generating heat. The cooling device is used to cool the stator 100 and the rotor 200, ensuring the normal operation of the motor.

[0067] Cooling technology for drive motors and other components is receiving increasing attention. Common cooling methods include natural cooling, water cooling, air cooling, and oil cooling. Natural cooling is a passive form of heat dissipation; while water cooling, air cooling, and oil cooling are active forms of heat dissipation, their heat dissipation capacity is limited. In summary, existing cooling technologies have poor cooling effects, resulting in insufficient heat dissipation for motors and other components, affecting their operating efficiency, and also posing safety risks.

[0068] refer to Figure 2 , Figure 3 and Figure 4 This application provides a cooling device, including a housing component 300 and a heat-conducting element 500. The housing component 300 includes a cooling cavity 320 and a space to be cooled 310. The cooling cavity 320 is used to cool the space to be cooled 310. The cooling cavity 320 has an inlet end 330 and an outlet end 340 communicating with the outside. The inlet end 330 is used for gas to enter the cooling cavity 320, and the outlet end 340 is used for gas to exit the cooling cavity 320. The heat-conducting element 500 is disposed between the inlet end 330 and the outlet end 340. Specifically, the housing component 300 can be a single housing structure or composed of multiple housings connected together. The heat-conducting element 500 can transfer heat from the cooling space to the cooling cavity 320.

[0069] In this embodiment, the application of a cooling device in a motor is used as an example for illustration.

[0070] The housing component 300 can be made of aluminum alloy, which has good thermal conductivity. The stator 100 and rotor 200 of the motor are housed in the cooling space 310 to transfer the heat generated by the stator core 110 or stator winding 120 to the housing component 300. A cooling chamber 320 is provided on the housing component 300. The cooling chamber 320 has an air inlet end 330 and an exhaust end 340 that communicate with the outside. Gas enters the cooling chamber 320 through the air inlet end 330 and is discharged through the exhaust end 340, thereby achieving gas cooling. A heat-conducting component 500 is provided between the air inlet end 330 and the exhaust end 340 to provide an active heat dissipation cooling solution. Combining gas cooling and active heat dissipation, the cooling effect on the components housed in the cooling space 310 is effectively improved, and the heat dissipation capacity is enhanced.

[0071] In the cooling device provided in this application, the inner wall of the housing component 300 forms a space 310 to be cooled, and the cooling cavity 320 is arranged around the space 310 to be cooled, so that cooling can be carried out in the circumferential direction of the stator 100, thereby improving the cooling effect.

[0072] At least one of the heat-conducting element 500, the air inlet end 330, and the exhaust end 340 is provided in multiple ways, with the heat-conducting element 500 corresponding to at least one of the air inlet end 330 and the exhaust end 340. Multiple heat-conducting elements 500 can be provided to improve the heat conduction effect on the space to be cooled 310. The air inlet end 330 is located at the same end of the multiple heat-conducting elements 500, and the exhaust end 340 is located at the other end of the multiple heat-conducting elements 500, so that the gas in the cooling chamber 320 can contact the multiple heat-conducting elements 500, improving the cooling effect; and / or, multiple air inlet ends 330 are provided, and the multiple air inlet ends 330 are located at the same end of the heat-conducting elements 500; and / or, multiple exhaust ends 340 are provided, and the multiple exhaust ends 340 are located at the same end of the heat-conducting elements 500, so that the gas entering the cooling chamber 320 can fully contact the heat-conducting elements 500.

[0073] Optionally, multiple heat-conducting components 500, air inlet ends 330, and exhaust ends 340 are provided. At least one of these multiple heat-conducting components 500, air inlet ends 330, and exhaust ends 340 is arranged around the space to be cooled 310 to improve the circumferential cooling effect of the space to be cooled 310. When multiple air inlet ends 330 are arranged around the space to be cooled 310, the gas in the cooling chamber 320 can enter the cooling chamber 320 from multiple positions around the stator 100, improving the airflow efficiency and further enhancing the motor's heat dissipation capacity.

[0074] refer to Figure 4 , Figure 5 , Figure 6 and Figure 7The housing component 300 includes a first housing 350 and a second housing 360. The first housing 350 encloses a cooling space 310, and the second housing 360 is fitted onto the first housing 350. The second housing 360 and the first housing 350 together form a cooling cavity 320. Specifically, the housing component 300 in this embodiment adopts an inner / outer housing structure. The first housing 350 is filled with coolant to cool the motor stator 100. Gas flows through the cooling cavity 320, located outside the cooling space 310, to achieve multiple cooling of the motor stator 100 and enhance the motor's heat dissipation capacity.

[0075] In one embodiment, the air inlet end 330 is configured as a first air inlet, and the exhaust end 340 is configured as an exhaust outlet, facilitating the placement of the air inlet end 330 and the exhaust end 340. The first housing 350 includes a first end plate 351 located at one end of the housing component 300 along the axial direction, and the second housing 360 includes a second end plate 361 located at the other end of the housing component 300 along the axial direction. The first air inlet is disposed on the first end plate 351, and the exhaust outlet is disposed on the second end plate 361. That is, the first air inlet and the exhaust outlet are respectively located at both ends of the housing component 300 along the axial direction, allowing the cold air in the cooling chamber 320 to circumferentially flow along the housing component 300, thereby achieving cooling in both the axial and circumferential directions of the motor stator 100 and improving the cooling effect. Multiple exhaust outlets can also be provided, arranged around the accommodating space to improve the gas discharge efficiency in the cooling chamber 320. The exhaust outlets are actually opened according to the heat dissipation requirements, filling the entire second end plate 361 as much as possible to ensure sufficient opening ratio.

[0076] In the cooling device provided in this application, the end of the second housing 360 away from the second end plate 361 along the axial direction of the housing component 300 is fixedly connected to the first end plate 351 of the first housing 350 by welding or other means. The end of the first housing 350 away from the first end plate 351 along the axial direction of the housing component 300 is fixedly connected to the second end plate 361 of the first housing 350 by welding or other means, thereby connecting the first housing 350 and the second housing 360 to form a cooling cavity 320. An end cap 370 is connected to the inner wall of the first housing 350. The end cap 370 is located at the end of the first housing 350 away from the first end plate 351, and the end cap 370 closes one end of the accommodating space, forming an internal closed cavity for storing coolant, lubricating oil, etc.

[0077] The heat-conducting component 500 is connected to the first housing 350 and / or the second housing 360, and can transfer heat from the first housing 350 to the cooling chamber 320 and the second housing 360. Specifically, the heat-conducting component 500 includes a support frame 510 and a heat-conducting pipe 520. The support frame 510 extends radially along the housing component 300, and one end of the support frame 510 is connected to the first housing 350 along the radial direction of the housing component 300. The heat-conducting pipe 520 is fixed to the support frame 510. The heat-conducting pipe 520 is fixed by the support frame 510 to ensure the stability of the structure and position of the heat-conducting pipe 520. The heat-conducting component 500 is welded to the first housing 350 through the support frame 510 to realize the transfer of heat from the first housing 350. In this application, the heat-conducting pipe 520 uses a copper pipe with high thermal conductivity, which makes it easier to even out the heat of the motor body and transfer it to the cooling chamber 320 and the second housing 360, enhances the heat dissipation capacity, and ensures sufficient heat dissipation. The gas introduced into the cooling chamber 320 is heated by the heat pipe 520 and discharged through the exhaust port, thereby improving the heat dissipation capacity of the motor.

[0078] In one embodiment, multiple heat pipes 520 are provided, with the multiple copper pipes spaced apart axially and / or radially in the housing component 300. Through the multi-layer copper pipe structure, the internal space of the cooling chamber 320 forms a multi-layer internal airflow channel structure with copper walls, enhancing convective heat transfer capacity. Multiple exhaust ends 340 are provided, with multiple heat pipes 520 corresponding to multiple exhaust ends 340; specifically, the number of heat pipes 520 can correspond one-to-one with the number of exhaust ends 340 to improve the exhaust efficiency of the gas heated by the heat pipes 520.

[0079] The cooling device provided in this application further includes a fan 600, which is disposed in the cooling chamber 320 and fixed to the first end plate 351, i.e., the fan 600 is disposed at the air inlet 330. The fan 600 is used to exhaust air from the cooling chamber 320 through the exhaust port. The fan 600 provided in this application is an axial flow fan 600, which can exhaust the cold air entering from the first exhaust port at one end of the housing component 300 along the axial direction of the housing component 300 through the exhaust port at the other end, thereby improving the heat exchange capacity. Multiple fans 600 are provided, arranged around the accommodating space, and multiple air inlets 330 are provided, with multiple fans 600 corresponding to multiple air inlets 330. For example, the number of fans 600 can be four, the number of air inlets 330 can be four, and the four fans 600 are evenly distributed at the four corners of the first end plate 351, improving the uniformity of heat dissipation. Multiple fans 600 work together according to the motor's operating conditions. One or more fans 600 can work simultaneously to ensure sufficient overall cooling of the motor and energy saving, making the motor run reliably and stably under different operating conditions.

[0080] The cooling device provided in this application further includes an air supply component 400, which is connected to the air inlet 330 and is used to supply cool air to the cooling chamber 320. By connecting the air supply component 400 to the air inlet 330 to supply cool air to the cooling chamber 320, and by using an exhaust port to discharge the gas from the cooling chamber 320, the cooling effect on the stator 100 housed within the accommodating space is further improved, thereby enhancing the motor's heat dissipation capacity.

[0081] The air supply component 400 includes a compressor 410, a vortex tube 420, and an air pipe 430. The vortex tube 420 is fixed to the outer wall of the housing component 300 and includes a second air inlet and a cold air outlet. The compressor 410 is connected to the second air inlet, and the cold air outlet is connected to the air inlet end 330. The vortex tube 420 generates a vortex in the high-speed airflow from the compressor 410, thereby separating the airflow into cold and hot streams. The air pipe 430 connects the air inlet end 330 of the housing component 300 with the cold air outlet of the vortex tube 420, so as to introduce cold air into the cooling chamber 320. The air pipe 430 includes a main pipe 431 and multiple branch pipes 432. One end of the main pipe 431 is connected to the cold air outlet of the vortex tube 420, and the other end of the main pipe 431 is connected to the multiple branch pipes 432. The multiple branch pipes 432 are connected to the multiple air inlets 330 one by one. The cold air flowing out of the cold air outlet of the vortex tube 420 is introduced into the cooling chamber 320 through the air pipe 430 via multiple branch pipes 432 and multiple air inlets 330, thereby improving the uniformity of the cold air flowing into the cooling chamber 320.

[0082] The compressor 410 can be directly connected to the vortex tube 420, or the compressor 410 can store the compressed high-pressure gas in a high-pressure gas cylinder, and then connect the high-pressure gas cylinder to the vortex tube 420 to provide high-pressure gas to the vortex tube 420. The vortex tube 420 includes an inlet pipe 421, a cold gas end pipe 422, and a hot gas end pipe 423. A second inlet port is provided on the inlet pipe 421, a cold gas outlet port is provided on the cold gas end pipe 422, and a hot gas outlet port is provided on the hot gas end pipe 423. The inlet end 330 is connected to the cold gas outlet port to provide cold gas to the cooling chamber 320.

[0083] The working principle of the vortex tube 420 is mainly based on the law of conservation of energy and the vortex effect. The air compressor 410 introduces high-pressure gas into the vortex chamber of the vortex tube 420 through the inlet pipe 421. Inside the vortex chamber, the gas begins to rotate at high speed, forming a swirling flow. This rotating airflow forms airflow layers with different angular velocities along the radial direction within the vortex chamber, with a higher angular velocity near the axis and a lower angular velocity at the edges. Due to friction between the airflow layers, some of the kinetic energy of the inner airflow is transferred to the outer airflow, causing the inner airflow velocity to decrease and the outer airflow velocity to increase. This energy transfer lowers the temperature of the inner airflow and raises the temperature of the outer airflow. The low-temperature inner gas flows out through the cold air end pipe 422, while the high-temperature outer gas flows out through the hot air end pipe 423.

[0084] The motor provided in this application employs a cooling device including a housing component 300, a vortex tube 420, a fan 600, and a heat-conducting component 500, which can provide overall cooling for the motor under different operating conditions. By adjusting the speed of the air compressor 410, and with the matching strategy of the vortex tube 420 and the fan 600, multiple overall heat dissipation of the motor under different operating conditions can be achieved, ensuring stable operating temperature and reliable operation of the drive motor.

[0085] refer to Figure 4 and Figure 8 This application provides a cooling method applied to a cooling device, the cooling method comprising:

[0086] Step S100: Adjust the cooling mode of the cooling device according to the cooling requirements of the space to be cooled 310.

[0087] Specifically, the cooling device can adjust the heat exchange efficiency of the air in the cooling chamber 320 by turning off the air supply component 400 and the fan 600, or by having the air supply component 400 or the fan 600 work alone, or by having the air supply component 400 and the fan 600 work simultaneously, based on parameters such as the temperature in the space to be cooled 310.

[0088] refer to Figure 4 and Figure 9 Step S100 includes at least one of the following:

[0089] In step S110, if the cooling requirement of the space to be cooled 310 is at level one, the fan 600 and the air supply component 400 are started simultaneously.

[0090] In step S120, if the cooling requirement of the space to be cooled 310 is a level 2 requirement, start the fan 600 and turn off the air supply component 400; or, start the air supply component 400 and turn off the fan 600.

[0091] In step S130, if the cooling requirement of the space to be cooled 310 is level three, the fan 600 and the air supply component 400 are turned off at the same time.

[0092] The cooling requirements decrease sequentially for Level 1, Level 2, and Level 3 demand.

[0093] Specifically, the motor has idling and non-idling operating conditions. When the motor is idling, its speed is zero, and the cooling requirement of the cooling space 310 is at level three. At this time, neither the fan 600 nor the air supply component 400 is working, and the motor can meet its heat dissipation requirements through natural cooling via the copper pipes and the second housing 360. When the motor is not idling, it has a speed. Depending on the motor's speed, the cooling requirement of the cooling space 310 is either level two or level one. In this case, the air supply component 400 can supply cool air to the cooling chamber 320 and / or the fan 600 can be started. The two cooling methods are matched and operated under multiple conditions to ensure optimal overall heat dissipation and energy consumption of the motor.

[0094] refer to Figure 4 and Figure 10 Step S110 includes:

[0095] Step S111: When the cooling demand of the space to be cooled 310 is at the first level of high demand, the fan 600 and the air supply component 400 are started at the same time, and both the fan 600 and the air supply component 400 are running at full speed.

[0096] In step S112, when the cooling demand of the space to be cooled 310 is at level 1 low demand, the fan 600 and the air supply component 400 are started at the same time, and at least one of the fan 600 and the air supply component 400 operates at a reduced speed.

[0097] The cooling requirements decrease sequentially from Level 1 (high demand) to Level 1 (low demand).

[0098] Specifically, in the motor control method, the first-level high demand refers to the motor operating at a speed greater than 8000 RPM, and the first-level low demand refers to the motor operating at a speed of 4000 RPM to 8000 RPM.

[0099] refer to Figure 4 and Figure 11 Step S120 includes:

[0100] Step S121: If the cooling requirement of the space to be cooled 310 is level 2 high requirement, start the fan 600 or the air supply component 400, and the fan 600 or the air supply component 400 will run at full speed.

[0101] Step S122: If the cooling demand of the space to be cooled 310 is at level 2 low demand, start the fan 600 or the air supply component 400, and the fan 600 or the air supply component 400 will run at a reduced speed.

[0102] The cooling requirements decrease sequentially for Level 2 high demand and Level 2 low demand.

[0103] Specifically, in the motor control method, the second-level high demand refers to the motor operating at a speed of 2000RPM to 4000RPM, and the second-level low demand refers to the motor operating at a speed of less than 2000RPM.

[0104] When the motor provided in this application is applied to a vehicle, during vehicle operation, when the vehicle speed is greater than 90 km / h and the gradient is greater than 8%, the motor speed is greater than 8000 RPM and the torque is greater than 50 Nm. The motor generates significant instantaneous heat, requiring high cooling demand in the cooling space 310. The air supply component 400 and fan 600 operate at full speed. On one hand, cool air carries away heat through copper pipes; on the other hand, overall heat dissipation is enhanced by increasing the temperature gradient between the first housing 350 and the second housing 360. When the vehicle speed is between 60 and 90 km / h and the gradient is between 3% and 8%, the motor speed is between 4000 and 8000 RPM and the torque is between 30 and 50 Nm. At this time, the motor generates considerable heat, requiring high cooling demand in the cooling space 310. When the vehicle speed is between 30 and 60 km / h and the gradient is less than 3%, the motor speed is between 2000 and 4000 RPM and the torque is between 20 and 30 Nm. At this time, the cooling demand of the space to be cooled 310 is between 20 and 30 Nm, the cooling demand is between 20 and 30 Nm, the cooling demand is between 20 and 30 Nm, the cooling demand is between 20 and 30 Nm, the cooling demand is between 30 and 30 Nm, the cooling demand is between 30 and 30 Nm, the cooling demand is between 30 and 30 Nm, the cooling demand is between 30 and 30 Nm, the cooling demand is between 30 and 310 ...

[0105] When the vehicle is traveling at a speed less than 60 km / h and on a gradient of less than 3%, and the motor is operating at a speed less than 4000 RPM and a torque of less than 30 Nm, only fan 600 operates, ensuring sufficient overall motor cooling while reducing energy consumption, thus improving motor cooling capacity by approximately 18.5%. When the vehicle is traveling at a speed greater than 60 km / h and on a gradient greater than 3%, and the motor is operating at a speed greater than 4000 RPM and a torque of greater than 30 Nm, cool air is supplied to the cooling chamber 320 through the air supply component 400 to cool the stator 100, and fan 600 is activated to air-cool the stator 100, further enhancing the overall motor cooling capacity, thus improving motor cooling capacity by approximately 40%.

[0106] The cooling device, motor, vehicle, cooling method, and control method provided in this application can achieve multiple overall heat dissipation of the motor under different operating conditions, ensuring stable operating temperature and reliable operation of the drive motor.

[0107] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0108] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A cooling device, characterized in that, include: A housing component, the housing component including a cooling chamber and a space to be cooled, the cooling chamber being used to cool the space to be cooled, the cooling chamber having an air inlet end and an air outlet end communicating with the outside, the air inlet end being used for gas to enter the cooling chamber, and the air outlet end being used for gas to exit the cooling chamber; A heat-conducting component is disposed between the air inlet end and the air outlet end.

2. The cooling device according to claim 1, characterized in that, There are at least one or more of the heat-conducting component, the air inlet end, and the exhaust end, and the heat-conducting component is provided in correspondence with at least one of the air inlet end and the exhaust end.

3. The cooling device according to claim 1, characterized in that, The inner wall of the housing component forms the space to be cooled, and the cooling cavity is arranged around the space to be cooled.

4. The cooling device according to claim 1, characterized in that, Multiple heat-conducting components, multiple air inlets, and multiple air outlets are provided, and at least one of the multiple heat-conducting components, multiple air inlets, and multiple air outlets is arranged around the space to be cooled.

5. The cooling device according to claim 1, characterized in that, The heat-conducting component includes a support frame and a heat-conducting pipe, the support frame extending radially along the housing component, and the heat-conducting pipe fixed to the support frame.

6. The cooling device according to claim 5, characterized in that, Multiple heat pipes are provided, and the multiple heat pipes are spaced apart in the axial and / or radial direction of the housing component; The exhaust end is provided in multiple ways, and the multiple heat-conducting pipes are provided corresponding to the multiple exhaust ends.

7. The cooling device according to claim 1, characterized in that, The cooling device also includes a fan, which is located at the air intake end.

8. The cooling device according to claim 7, characterized in that, The fan is provided in multiple ways, and the multiple fans are arranged around the space to be cooled; The air intake end is provided with multiple air intake ends, and multiple fans are provided corresponding to multiple air intake ends.

9. The cooling device according to claim 1 or 4, characterized in that, The air inlet and the air outlet are respectively located at both ends of the housing component along the axial direction; the air inlet is configured as a first air inlet and the air outlet is configured as an air outlet.

10. The cooling device according to claim 1, characterized in that, The cooling device also includes an air supply component, which is connected to the air inlet and is used to supply cold air to the cooling chamber.

11. The cooling device according to claim 10, characterized in that, The air supply component includes a compressor and a vortex tube. The vortex tube includes a second air inlet and a cold air outlet. The compressor is connected to the second air inlet, and the cold air outlet is connected to the air inlet.

12. The cooling device according to claim 11, characterized in that, The gas supply component also includes a gas pipe, which includes a main pipe and multiple branch pipes. One end of the main pipe is connected to the cold air outlet, and the other end of the main pipe is connected to the multiple branch pipes. Multiple air inlets are provided, and the multiple branch pipes are connected to the multiple air inlets one by one.

13. The cooling device according to claim 5, characterized in that, The housing component includes a first housing and a second housing, the first housing enclosing the space to be cooled, the second housing being fitted onto the first housing, and the second housing and the first housing forming the cooling cavity; the heat-conducting element is connected to the first housing and / or the second housing.

14. The cooling device according to claim 13, characterized in that, The support frame is connected to the first housing at one end along the radial direction of the housing component.

15. An electric motor, characterized in that, It includes a stator and a cooling device as described in any one of claims 1-14, wherein the stator is disposed within the cooling device.

16. A vehicle, characterized in that, Including the motor as described in claim 15.

17. A cooling method, characterized in that, Applied to the cooling apparatus as described in any one of claims 1-14, the cooling method comprises: Adjust the cooling mode of the cooling device according to the cooling requirements of the space to be cooled.

18. The cooling method according to claim 17, characterized in that, The cooling device also includes a fan and an air supply component. The cooling mode of the cooling device is adjusted according to the cooling requirements of the space to be cooled, including at least one of the following: When the cooling requirement of the space to be cooled is at level one, the fan and the air supply component are started simultaneously. If the cooling requirement of the space to be cooled is a secondary requirement, start the fan and turn off the air supply component; or, start the air supply component and turn off the fan. When the cooling requirement of the space to be cooled is level three, the fan and the air supply component are turned off simultaneously. The cooling requirements corresponding to the first-level demand, the second-level demand, and the third-level demand decrease sequentially.

19. The cooling method according to claim 18, characterized in that, When the cooling demand of the space to be cooled is at Level 1 High, the fan and the air supply component are started simultaneously, and both the fan and the air supply component are running at full speed. When the cooling demand of the space to be cooled is at a low level, the fan and the air supply component are started simultaneously, and at least one of the fan and the air supply component operates at a reduced speed. The cooling requirements corresponding to the first-level high demand and the first-level low demand decrease sequentially.

20. The cooling method according to claim 18, characterized in that, When the cooling requirement of the space to be cooled is Level 2 high, the fan or the air supply component is started and runs at full speed. When the cooling requirement of the space to be cooled is at level two low requirement, the fan or the air supply component is started, and the fan or the air supply component moves at a reduced speed. The cooling requirements corresponding to the second-level high demand and the second-level low demand decrease sequentially.

21. A method for controlling an electric motor, characterized in that, include: According to any one of claims 18-20, the motor is disposed within the space to be cooled.

22. The control method according to claim 21, characterized in that, The first-level requirement is that the motor operates at a speed greater than 4000 RPM, the second-level requirement is that the motor operates at a speed less than 4000 RPM, and the third-level requirement is that the motor is idling.

23. The control method according to claim 22, characterized in that, When the cooling demand of the space to be cooled is at Level 1 High, the fan and the air supply component are started simultaneously, and both the fan and the air supply component are running at full speed. When the cooling demand of the space to be cooled is at a low level, the fan and the air supply component are started simultaneously, and at least one of the fan and the air supply component operates at a reduced speed. The first-level high demand refers to the motor operating at a speed greater than 8000 RPM, and the first-level low demand refers to the motor operating at a speed between 4000 RPM and 8000 RPM.

24. The control method according to claim 22, characterized in that, When the cooling requirement of the space to be cooled is Level 2 high, the fan or the air supply component is started and runs at full speed. When the cooling requirement of the space to be cooled is at level two low requirement, the fan or the air supply component is started, and the fan or the air supply component moves at a reduced speed. The secondary high demand refers to the motor operating at a speed of 2000 RPM to 4000 RPM, and the secondary low demand refers to the motor operating at a speed of less than 2000 RPM.

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