Intelligent liquid cooling heat dissipation wheel hub motor

Abstract

The utility model discloses a kind of intelligent liquid cooling heat dissipation's wheel hub motor, it is related to wheel hub motor technical field.The motor is constituted by motor assembly, shell assembly, transmission assembly and liquid cooling component, motor assembly contains main shaft, inner rotor and outer stator, main shaft is equipped with back liquid and liquid inlet passage;Transmission assembly contains sun gear, planetary gear and planet gear ring, external liquid cooling pump does not affect its mechanical path;In addition to conventional components, liquid cooling component additionally adds temperature sensor, external liquid cooling pump and motor controller.Temperature sensor is embedded in the temperature monitoring of outer stator winding gap, uses PWM signal stepless regulation external liquid cooling pump flow rate, realizes intelligent heat dissipation.The utility model can accurately monitor stator temperature, intelligently adjust heat dissipation intensity, improve heat dissipation efficiency, ensure motor stable operation, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of hub motor technology, specifically to a hub motor with intelligent liquid cooling. Background Technology

[0002] As a core component of electric vehicles, the stability of the in-wheel motor directly affects the vehicle's operating efficiency and safety. During operation, especially under high loads, the motor stator and other components generate a significant amount of heat. If this heat cannot be dissipated effectively and promptly, the motor temperature will become excessively high, affecting its efficiency, lifespan, and potentially causing malfunctions. Traditional in-wheel motor cooling methods often rely on natural cooling or simple air cooling, which have low efficiency and cannot intelligently adjust based on the motor's actual temperature, making them unsuitable for the cooling requirements of modern high-power in-wheel motors.

[0003] Therefore, it is of great significance to provide a smart liquid-cooled hub motor to solve the problems existing in the current technology. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a smart liquid-cooled hub motor to solve the problem.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A smart liquid-cooled hub motor includes a motor assembly, a housing assembly, a transmission assembly, and a liquid-cooling assembly.

[0006] The motor assembly includes a main shaft, an inner rotor, and an outer stator. One end of the main shaft has a return channel and a supply channel, which are used for the return and entry of coolant, providing a channel foundation for the liquid cooling system.

[0007] The housing assembly includes housing one and housing two, which together constitute the outer housing of the hub motor and provide protection and support for the internal components.

[0008] The transmission assembly includes a sun gear, planetary gears, and a planetary ring gear. The sun gear is connected to the inner rotor, and the planetary ring gear is fixedly connected to the outer casing. The external liquid cooling pump does not affect the mechanical path of the transmission assembly, ensuring that the transmission assembly can transmit power normally and stably.

[0009] The liquid cooling assembly includes a coolant inlet pipe, an external air-cooled radiator, a coolant return pipe, a temperature sensor, an external liquid cooling pump, and a motor controller. The temperature sensor is a thermistor embedded in the winding gap of the external stator, enabling precise real-time monitoring of the external stator temperature. The external liquid cooling pump is an electric centrifugal pump, fixed to the vehicle frame by a bracket. Its power supply circuit is integrated with the motor controller and is independent of the hub motor. The inlet end of the external liquid cooling pump is connected to the return channel inside the hub motor via the coolant return pipe, and the outlet end is connected to the inlet channel via the coolant inlet pipe. The inlet end of the inlet channel is connected to an outlet pipe, and the inlet end of the return channel is connected to an extension pipe, the end of which extends into the coolant inside the outer casing, forming a complete coolant circulation loop. The motor controller is electrically connected to the temperature sensor and the external liquid cooling pump, and has a built-in temperature threshold module. The liquid cooling assembly also includes a flow sensor mounted on the coolant inlet pipe, electrically connected to the motor controller to provide flow data feedback. The motor controller receives temperature signals from temperature sensors. When the stator temperature exceeds a first threshold, it increases the flow rate of the external liquid cooling pump; when it falls below a second threshold (first threshold > second threshold), it decreases the flow rate. The controller also adjusts the speed of the external liquid cooling pump via PWM signals to achieve stepless flow rate regulation, thereby intelligently controlling the heat dissipation intensity of the liquid cooling system based on the actual motor temperature.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. The temperature sensor is embedded in the gap of the outer stator winding, which can monitor the stator temperature in real time and accurately, providing accurate data support for intelligent heat dissipation adjustment.

[0011] 2. The external liquid cooling pump is set up independently and does not affect the mechanical path of the transmission components, which not only ensures the stability of the transmission system, but also realizes the independent and efficient operation of the liquid cooling heat dissipation system.

[0012] 3. The motor controller, through built-in temperature threshold module and flow sensor feedback, can automatically adjust the flow rate of the external liquid cooling pump according to the stator temperature change, realize intelligent stepless adjustment of heat dissipation intensity, improve heat dissipation efficiency, adapt to heat dissipation requirements under different working conditions, avoid motor overheating or excessive heat dissipation, and extend motor service life.

[0013] 4. The liquid cooling circulation loop design allows the coolant to fully exchange heat with the motor's heat-generating components, further improving the heat dissipation effect.

[0014] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0015] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0016] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a system flowchart of the present invention.

[0018] In the diagram: 1. Outer casing 1; 2. Rotary bearing; 3. Main shaft; 4. Inner rotor; 5. Outer stator; 6. Planetary gear; 7. Gear carrier; 8. Coolant inlet pipe; 9. External air-cooled radiator; 10. Sun gear; 11. Coolant return pipe; 12. External liquid cooling pump; 13. Outer casing 2; 14. Extension pipe; 15. Temperature sensor; 16. Outlet pipe; 17. Planetary gear ring; 18. Inlet channel; 19. Return channel; 20. Motor controller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0020] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0021] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0022] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0023] Please see Figure 1-2 This utility model provides a technical solution for an intelligent liquid-cooled hub motor: Outer shell 1 and outer shell 2 13 constitute the outer casing of the motor, and motor components and transmission components are installed inside. In the motor component, the inner rotor 4 and outer stator 5 are arranged around the main shaft 3. The inner rotor 4 is connected to the sun gear 10 for transmission, and planetary gears 6 mesh with the sun gear 10 and planetary ring gear 21 respectively. The planetary ring gear 21 is fixedly connected to outer shell 2 13, forming a planetary gear transmission structure to realize power transmission.

[0024] Temperature sensor 15, acting as a thermistor, is embedded in the winding gap of the outer stator 5. It can sense the temperature change of the outer stator 5 in real time and transmit the temperature signal to the motor controller 20. External liquid cooling pump 12 is fixed to the frame by a bracket. Its inlet end is connected to the return channel 19 on the main shaft 3 via a coolant return pipe 11. The extension pipe 14 connected to the inlet end of the return channel 19 extends into the coolant inside the outer casing 13 to draw in the coolant. The outlet end of external liquid cooling pump 12 is connected to the inlet channel 18 on the main shaft 3 via a coolant inlet pipe 8. The inlet end of the inlet channel 18 is connected to the outlet pipe 16, which delivers the coolant to the areas inside the motor that require heat dissipation.

[0025] When the hub motor is operating, the outer stator 5 generates heat, and the temperature sensor 15 monitors its temperature in real time. The temperature threshold module built into the motor controller 20 presets a first threshold and a second threshold (the first threshold > the second threshold). When the temperature sensor 15 detects that the stator temperature exceeds the first threshold, it indicates that the motor temperature is too high and heat dissipation needs to be strengthened. The motor controller 20 sends a signal to adjust the speed of the external liquid cooling pump 12 through a PWM signal, increasing its flow rate so that more coolant participates in the circulation and removes more heat. The coolant enters the return channel 19 from inside the outer casing 13 through the extension pipe 14, is drawn out by the external liquid cooling pump 12 through the coolant return pipe 11, and is transported to the inside of the motor through the coolant inlet pipe 8, the inlet channel 18, and the outlet pipe 16. After exchanging heat with the heat-generating components, it returns to the inside of the outer casing 13 to complete the circulation. At the same time, the flow sensor installed on the coolant inlet pipe 8 feeds back the flow data to the motor controller 20 to ensure precise control of the flow rate. When the stator temperature is below the second threshold, it indicates that the motor temperature is low and no high-intensity heat dissipation is required. The motor controller 20 controls the external liquid cooling pump 12 to reduce the flow rate, reduce energy consumption, and achieve intelligent adjustment.

[0026] The external air-cooled radiator 9 can assist in cooling the circulating coolant, further improving the efficiency of the entire liquid cooling system.

[0027] The above description is merely a preferred embodiment of this utility model and does not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A smart liquid-cooled hub motor, comprising a motor assembly, a housing assembly, a transmission assembly, and a liquid-cooling assembly, wherein the motor assembly comprises a main shaft (3), an inner rotor (4), and an outer stator (5); the housing assembly comprises a first housing (1) and a second housing (13); and the liquid-cooling assembly comprises a coolant inlet pipe (8), an external air-cooled radiator (9), and a coolant return pipe (11), characterized in that: It also includes a temperature sensor (15), an external liquid cooling pump (12), and a motor controller (20). The temperature sensor (15) is installed on the outer stator (5) for real-time monitoring of the stator temperature; One end of the main shaft (3) is provided with a return channel (19) and an inlet channel (18). The external liquid cooling pump (12) is set independently of the hub motor. Its inlet end is connected to the return channel (19) inside the hub motor through the coolant return pipe (11), and its outlet end is connected to the inlet channel (18) through the coolant inlet pipe (8). The inlet end of the inlet channel (18) is connected to the outlet pipe (16). The motor controller (20) is electrically connected to the temperature sensor (15) and the external liquid cooling pump (12) respectively, and is used to receive temperature signals and adjust the flow rate of the external liquid cooling pump (12).

2. The hub motor according to claim 1, characterized in that: The temperature sensor is a thermistor, which is embedded in the winding gap of the outer stator (5).

3. The wheel hub motor of claim 1, wherein: The external liquid cooling pump (12) is an electric centrifugal pump, which is fixed to the vehicle frame by a bracket, and the power supply circuit is integrated with the motor controller (20).

4. The wheel hub motor of claim 1, wherein: The motor controller (20) has a built-in temperature threshold module. When the stator temperature exceeds the first threshold, the flow rate is increased; when it is below the second threshold, the flow rate is decreased. The first threshold is greater than the second threshold.

5. The in-wheel motor according to claim 1, characterized by: The liquid cooling assembly also includes a flow sensor installed on the coolant inlet pipe (8), which is electrically connected to the motor controller (20) to provide flow data feedback.

6. The hub motor according to claim 1, characterized in that: The inlet end of the return channel (19) is connected to the extension pipe (14), and the end extends into the coolant inside the outer shell (13).

7. The in-wheel motor according to claim 1, characterized by: The motor controller adjusts the speed of the external liquid cooling pump through a PWM signal to achieve stepless flow rate regulation.

8. The in-wheel motor according to claim 1, characterized by: The transmission assembly includes a sun gear (10), a planetary gear (6) and a planetary ring gear (21). The sun gear (10) is connected to the inner rotor (4) for transmission. The planetary ring gear (21) is fixedly connected to the outer casing (13). The setting of the external liquid cooling pump (12) does not affect the mechanical path of the transmission assembly.

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