Dual motor powertrain and vehicle

Abstract

The embodiment of the application provides a kind of double motor power system and vehicle, including power mechanism, it includes first motor assembly, second motor assembly and coupling component, coupling component is connected first motor assembly and second motor assembly respectively, for controlling the mechanical energy transmission of both;Power supply mechanism is connected first motor assembly and second motor assembly respectively, to switch charging mode and heating mode;Wherein when operating charging mode, coupling component couples first motor assembly and second motor assembly, and cut off the mechanical energy output of both, to make first motor assembly operate in electric form, second motor assembly operates in the form of power generation;When operating heating mode, coupling component couples first motor assembly and second motor assembly, to make first motor assembly and second motor assembly alternately in electric form and power generation form.It can realize boost charging, boost charging and battery heating function, to meet different functional requirements.

Description

Technical Field

[0001] This application relates to the field of power system technology, and more specifically, to a dual-motor power system and vehicle. Background Technology

[0002] With societal development, technological advancements, and ever-evolving tastes in styling, significant changes have occurred in automotive design. One such change involves the power and complexity of various electrical systems within the vehicle, particularly in alternative fuel vehicles such as hybrid, electric, and fuel cell vehicles.

[0003] As the electric vehicle industry develops, the market has put forward new demands for electric vehicles, including boost charging, boost current charging, and AC battery heating. Therefore, how to achieve boost charging, boost current charging, and AC battery heating is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a dual-motor power system and vehicle that can realize boost charging, boost charging and battery heating functions to meet different functional requirements.

[0005] In a first aspect, embodiments of this application provide a dual-motor power system, comprising: a power mechanism including a first motor assembly, a second motor assembly, and a coupling component, wherein the coupling component is respectively connected to the first motor assembly and the second motor assembly, and is used to couple the first motor assembly and the second motor assembly to control the mechanical energy transmission between them; and a power supply mechanism, which is respectively connected to the first motor assembly and the second motor assembly to switch between a charging mode and a heating mode; wherein when the charging mode is running, the coupling component couples the first motor assembly and the second motor assembly and cuts off the mechanical energy output of both, so that the first motor assembly operates in an electric mode and the second motor assembly operates in a power generation mode; when the heating mode is running, the coupling component couples the first motor assembly and the second motor assembly, so that the first motor assembly and the second motor assembly alternately operate in the electric mode and the power generation mode.

[0006] In the above implementation process, the first motor assembly and the second motor assembly are coupled through a coupling assembly. The power supply mechanism is connected to the first motor assembly and the second motor assembly respectively. When the vehicle is parked and charging, the coupling assembly disconnects the mechanical connection between the first motor assembly and the second motor assembly and the wheels. Then, the power supply mechanism switches so that the first motor assembly and the second motor assembly operate in their respective modes. Regardless of the supply voltage, it will not affect whether the power mechanism enters the electric mode or the generator mode. Therefore, boost charging or boost charging can be achieved. When it is necessary to heat the battery, the first motor assembly and the second motor assembly are connected. The first motor assembly and the second motor assembly alternate between electric mode and generator mode, thereby realizing the alternating charging and discharging of the battery and realizing the heating function, thus meeting different functional requirements.

[0007] In some embodiments, the power supply mechanism includes a power battery, a first switch, and a second switch. The positive terminal of the power battery is connected to the first switch, the negative terminal of the power battery is connected to the negative terminal of the second motor assembly, the positive terminal of the second motor assembly is connected between the positive terminal of the power battery and the first switch, the negative terminal of the first motor assembly is connected between the negative terminal of the power battery and the negative terminal of the second motor assembly, and the positive terminal of the first motor assembly is connected to both the first switch and the second switch.

[0008] In the above implementation process, the first switch is connected to the first motor assembly, and the second switch is connected to both the first and second motor assemblies. The power battery is connected to both the first switch and the second motor assembly. When the vehicle is parked and charging, the coupling assembly disconnects the mechanical connection between the first and second motor assemblies and the wheels. The first motor assembly draws power from the charging pile and operates in electric mode, while the second motor assembly operates in generator mode, converting the mechanical energy output by the first motor assembly into electrical energy to charge the power battery. This achieves the function of boost charging or boost current charging, meeting different functional requirements and enabling compatible charging without a charging pile.

[0009] In some embodiments, when the charging mode is running, the first switch is off and the second switch is on.

[0010] In the above process, after the first switch is opened and the second switch is closed, the first motor assembly draws power from the charging pile to operate in electric mode, and the second motor assembly operates in generator mode, converting the mechanical energy output by the first motor assembly into electrical energy to charge the power battery, realizing the function of boost charging or boost charging, meeting different functional requirements, and achieving compatible charging of different charging piles.

[0011] In some embodiments, the power supply mechanism further includes a DC charging port, the positive terminal of which is connected to the second switch, and the negative terminal of which is connected to the negative terminal of the second motor assembly.

[0012] In the above implementation process, when the vehicle is parked and charging, if the DC charging port is a low-voltage pile and the power battery is a high-voltage battery, the voltage can be boosted by opening the first switch and closing the second switch. If the DC charging port is a high-voltage pile and the power battery is a low-voltage battery, the current can be boosted by opening the first switch and closing the second switch. This achieves compatible charging with different charging piles and improves convenience.

[0013] In some embodiments, the power supply mechanism includes a first battery pack and a second battery pack, wherein the first battery pack is connected to the first motor assembly and the second battery pack is connected to the second motor assembly.

[0014] In the above implementation process, when the heating mode needs to be operated, a mechanical connection is established between the first motor assembly and the second motor assembly. The first battery pack can supply power to the first motor assembly, and the second battery pack can supply power to the second motor assembly. The first motor assembly and the second motor assembly alternate between electric mode and power generation mode, thereby realizing the alternating charging and discharging of the first battery pack and the second battery pack, and finally realizing the heating function.

[0015] In some embodiments, the power supply mechanism includes a first battery pack, a second battery pack, a first switch, and a second switch. The first battery pack and the second battery pack are connected in series to form a positive terminal, a negative terminal, and a midpoint. The positive terminal is connected to the positive terminal of the first motor assembly, the negative terminal is connected to the negative terminal of the second motor assembly, the first switch is connected to the negative terminal of the first motor assembly, and the second switch is connected to the positive terminal of the second motor assembly. When the heating mode is running, the first switch and the second switch are respectively connected to the midpoint.

[0016] In the above implementation process, the first battery pack and the second battery pack are connected in series. The power supply for the first motor assembly and the second motor assembly can be selected from the battery pack consisting of the first battery pack and the second battery pack, or power can be drawn from the first battery pack and the second battery pack respectively. In this way, when the first battery pack and the second battery pack need to be heated, power can be drawn from the first battery pack and the second battery pack respectively, so as to transfer energy between the first battery pack and the second battery pack and finally achieve the heating function. In normal driving conditions, power can be selected from the entire battery pack to ensure output power and ensure power performance.

[0017] In some embodiments, the first motor assembly includes a first inverter and a first motor structure, wherein the first inverter is connected to the first motor structure.

[0018] In some embodiments, the second motor assembly includes a second inverter and a second motor structure, wherein the second inverter is connected to the second motor structure.

[0019] In some embodiments, the coupling assembly includes a first gear, a second gear, a clutch, a reducer, and a differential. The first gear is connected to the first motor assembly and meshes with the second gear. The second gear is connected to the second motor assembly. The clutch connects the second gear and the reducer. The differential connects to the reducer.

[0020] In the above process, the clutch is disengaged, the first gear meshes with the second gear, and the mechanical connection between the first motor assembly and the second motor assembly is realized, completing the bidirectional transmission of mechanical energy between the first motor assembly and the second motor assembly. When the clutch is closed, mechanical energy can be transmitted to the wheels, ultimately realizing the rotation of the wheels. At the same time, the differential can realize high speed ratio transmission, with high transmission efficiency and torque transmission capability.

[0021] Secondly, this application also provides a vehicle including a dual-motor power system as described in any of the preceding claims.

[0022] Since the vehicle provided in the second aspect includes a dual-motor powertrain, it possesses all the technical benefits of a dual-motor powertrain, which will not be elaborated upon here.

[0023] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the dual-motor power system provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the coupling component of the dual-motor power system provided in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the charging mode of the dual-motor power system provided in the embodiments of this application;

[0029] Figure 4 A schematic diagram of a heating mode of a dual-motor power system provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of another heating mode of the dual-motor power system provided in an embodiment of this application.

[0031] Figure Labels

[0032] 100. Power mechanism; 101. First motor assembly; 1011. First inverter; 1012. First motor structure; 102. Second motor assembly; 1021. Second inverter; 1022. Second motor structure; 103. Coupling assembly; 1031. First gear; 1032. Second gear; 1033. Clutch; 1034. Reducer; 1035. Differential; 200. Power supply mechanism; 201. Power battery; 202. First switch; 203. Second switch; 204. DC charging port; 205. First battery pack; 206. Second battery pack. Detailed Implementation

[0033] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0038] Example

[0039] During the design process, the inventors discovered that with the development of the electric vehicle industry, the market has raised new demands for electric vehicles, including:

[0040] Boost charging: High-end electric vehicles are gradually adopting 800V high-voltage batteries, but there are still many old charging piles on the market whose maximum output voltage is lower than the battery voltage. Therefore, electric vehicles need to use certain technical means to achieve compatible charging with old low-voltage charging piles.

[0041] Boost charging: For charging piles with high maximum output voltage, if the electric vehicle's power battery voltage is too low, the voltage can only be reduced to the battery voltage to charge the vehicle, which cannot fully utilize its own charging power. This is reflected at the battery end as the battery charging current being less than the battery's maximum allowable charging current. Therefore, it is hoped that there is a technical solution that allows the charging pile to charge with a higher output voltage when the battery voltage is lower than the charging pile voltage, thereby increasing the battery charging current.

[0042] Battery AC heating: Power batteries have weak discharge capacity at low temperatures and need to be heated quickly to restore normal use. AC heating is a technology that uses alternating current to generate Joule heat on the battery's internal resistance to heat the battery. It has the characteristic of fast heating speed and is an important battery rapid heating technology.

[0043] In view of this, such as Figures 1-5As shown, in a first aspect, embodiments of this application provide a dual-motor power system, including: a power mechanism 100, comprising a first motor assembly 101, a second motor assembly 102, and a coupling component 103, wherein the coupling component 103 is connected to the first motor assembly 101 and the second motor assembly 102 respectively, for coupling the first motor assembly 101 and the second motor assembly 102 and controlling the mechanical energy transmission between them; and a power supply mechanism 200, which is connected to the first motor assembly 101 and the second motor assembly 102 respectively, for switching between a charging mode and a heating mode; wherein when the charging mode is running, the coupling component 103 couples the first motor assembly 101 and the second motor assembly 102 and cuts off the mechanical energy output of both, so that the first motor assembly 101 operates in an electric mode and the second motor assembly 102 operates in a power generation mode; when the heating mode is running, the coupling component 103 couples the first motor assembly 101 and the second motor assembly 102, so that the first motor assembly 101 and the second motor assembly 102 alternately operate in the electric mode and the power generation mode.

[0044] For example, the first motor assembly 101 and the second motor assembly 102 are connected to the wheel through the coupling assembly. The power supply mechanism 200 can serve as a power supply structure, connecting the first motor assembly 101 and the second motor assembly 102 respectively to provide electrical energy. Of course, the first motor assembly 101 and the second motor assembly 102 can also convert their recovered mechanical energy into electrical energy to charge the power supply mechanism 200, etc.

[0045] In the above implementation process, the first motor assembly 101 and the second motor assembly 102 are coupled through the coupling assembly 103. The power supply mechanism 200 is connected to the first motor assembly 101 and the second motor assembly 102 respectively. When the vehicle is parked and charging, the coupling assembly 103 disconnects the mechanical connection between the first motor assembly 101 and the second motor assembly 102 and the wheels respectively. Then, the power supply mechanism 200 switches so that the first motor assembly 101 and the second motor assembly 102 operate in their respective modes. Regardless of the supply voltage, it will not affect the power mechanism 100 from entering the electric mode or the generator mode. Therefore, boost charging or boost current charging can be achieved. When it is necessary to heat the battery, the first motor assembly 101 and the second motor assembly 102 are connected. The first motor assembly 101 and the second motor assembly 102 alternate between electric mode and generator mode, thereby realizing the alternating charging and discharging of the battery and realizing the heating function, thus meeting different functional requirements.

[0046] like Figure 3As shown, the power supply mechanism 200 includes a power battery 201, a first switch 202, and a second switch 203. The positive terminal of the power battery 201 is connected to the first switch 202, and the negative terminal of the power battery 201 is connected to the negative terminal of the second motor assembly 102. The positive terminal of the second motor assembly 102 is connected between the positive terminal of the power battery 201 and the first switch 202, and the negative terminal of the first motor assembly 101 is connected between the negative terminal of the power battery 201 and the negative terminal of the second motor assembly 102. The positive terminal of the first motor assembly 101 is connected to both the first switch 202 and the second switch 203.

[0047] For example, the power battery 201 is a battery pack, which is installed in the vehicle to provide electrical energy. The first switch 202 and the second switch 203 are respectively connected to the positive terminal of the first motor assembly 101. Because the power supply voltage does not affect whether the motor of the power mechanism 100 enters the electric mode or the generator mode, the first motor assembly 101 can operate in the electric mode after drawing power from the DC charging pile, while the second motor assembly 102 operates in the generator mode, thus realizing the functions of boost charging and boost current charging.

[0048] In the above implementation process, the first switch 202 is connected to the first motor assembly 101, and the second switch 203 is connected to both the first motor assembly 101 and the second motor assembly 102. The power battery 201 is connected to both the first switch 202 and the second motor assembly 102. When the vehicle is parked and charging, the coupling component disconnects the mechanical connection between the first motor assembly 101 and the second motor assembly 102 and the wheels. The first motor assembly 101 draws power from the charging pile and operates in electric mode, while the second motor assembly 102 operates in generator mode, converting the mechanical energy output by the first motor assembly 101 into electrical energy to charge the power battery 201. This achieves the function of boost charging or boost current charging, meeting different functional requirements and enabling compatible charging without a charging pile.

[0049] In some embodiments, when the charging mode is running, the first switch 202 is open and the second switch 203 is closed.

[0050] In the above process, after the first switch 202 is opened and the second switch 203 is closed, the first motor assembly 101 draws power from the charging pile to operate in electric mode, and the second motor assembly 102 operates in generator mode, converting the mechanical energy output by the first motor assembly 101 into electrical energy to charge the power battery 201, realizing the function of boost charging or boost charging, meeting different functional requirements, and realizing compatible charging of different charging piles.

[0051] In some embodiments, the power supply mechanism 200 further includes a DC charging port 204, the positive terminal of which is connected to the second switch 203, and the negative terminal of which is connected to the negative terminal of the second motor assembly 102.

[0052] In the above implementation process, when the vehicle is parked and charging, if the DC charging port 204 is a low-voltage charging pile and the power battery 201 is a high-voltage battery, the voltage can be boosted by opening the first switch 202 and closing the second switch 203. If the DC charging port 204 is a high-voltage charging pile and the power battery 201 is a low-voltage battery, the current can be boosted by opening the first switch 202 and closing the second switch 203. This achieves compatible charging with different charging piles and improves convenience.

[0053] like Figure 4 As shown, the power supply mechanism 200 includes a first battery pack 205 and a second battery pack 206. The first battery pack 205 is connected to the first motor assembly 101, and the second battery pack 206 is connected to the second motor assembly 102. That is, the first battery pack 205 and the second battery pack 206 can be set as independent battery packs. It is worth mentioning that as long as there is energy exchange between the first battery pack 205 and the second battery pack 206, AC heating can be achieved. For example, the first motor assembly 101 can output energy to drive the motor and charge the second battery pack 206 at the same time. Then, it can switch to the second motor assembly 102 outputting energy to drive the motor and charge the first battery pack 205 at the same time. The two modes alternate, thereby achieving AC heating of the battery while the vehicle is running normally, without requiring the motor (first motor assembly 101, second motor assembly 102) and the wheel axle to be disconnected.

[0054] In the above implementation process, when the heating mode needs to be operated, a mechanical connection is established between the first motor assembly 101 and the second motor assembly 102. The first battery pack 205 can supply power to the first motor assembly 101, and the second battery pack 206 can supply power to the second motor assembly 102. The first motor assembly 101 and the second motor assembly 102 alternate between electric mode and power generation mode, thereby realizing the alternating charging and discharging of the first battery pack 205 and the second battery pack 206, and finally realizing the heating function.

[0055] like Figure 5As shown, the power supply mechanism 200 includes a first battery pack 205, a second battery pack 206, a first switch 202, and a second switch 203. The first battery pack 205 and the second battery pack 206 are connected in series to form a positive terminal, a negative terminal, and an intermediate point. The positive terminal is connected to the positive terminal of the first motor assembly 101, and the negative terminal is connected to the negative terminal of the second motor assembly 102. The first switch 202 is connected to the negative terminal of the first motor assembly 101, and the second switch 203 is connected to the positive terminal of the second motor assembly 102. When the heating mode is running, the first switch 202 and the second switch 203 are respectively connected to the intermediate point.

[0056] In the above implementation process, the first battery pack 205 and the second battery pack 206 are connected in series. The power supply for the first motor assembly 101 and the second motor assembly 102 can be selected from the battery pack composed of the first battery pack 205 and the second battery pack 206, or power can be drawn from the first battery pack 205 and the second battery pack 206 respectively. In this way, when the first battery pack 205 and the second battery pack 206 need to be heated, power can be drawn from the first battery pack 205 and the second battery pack 206 respectively, so that energy can be transferred between the first battery pack 205 and the second battery pack 206 to achieve the heating function. In normal driving conditions, power can be selected from the entire battery pack to ensure output power and ensure power performance.

[0057] In some embodiments, the first motor assembly 101 includes a first inverter 1011 and a first motor structure 1012, with the first inverter 1011 connected to the first motor structure 1012. For example, the first inverter 1011 is a three-phase inverter. When operating in charging mode, the positive terminal of the first inverter 1011 is connected to the first switch 202 and the second switch 203, respectively, and the negative terminal of the first inverter 1011 is connected to the negative terminal of the power battery 201. When operating in heating mode, the positive and negative terminals of the first inverter 1011 are connected to the positive and negative terminals of the first battery pack 205, respectively, or the positive terminal of the first inverter 1011 is connected to the positive terminal, and the negative terminal of the first inverter 1011 is connected to the first switch 202 (i.e., corresponding to the scheme where the first battery pack 205 and the second battery pack 206 are connected in series).

[0058] In some embodiments, the second motor assembly 102 includes a second inverter 1021 and a second motor structure 1022, with the second inverter 1021 connected to the second motor structure 1022. For example, the second inverter 1021 includes a three-phase inverter. In charging mode, the positive terminal of the second inverter 1021 is connected between the power battery 201 and the first switch 202, and the negative terminal of the second inverter 1021 is connected to the negative terminal of the power battery 201. In heating mode, the positive and negative terminals of the second inverter 1021 are connected to the positive and negative terminals of the second battery pack 206, respectively; or the positive terminal of the second inverter 1021 is connected to the second switch 203, and the negative terminal of the second inverter 1021 is connected to the negative terminal (i.e., corresponding to the scheme where the first battery pack 205 and the second battery pack 206 are connected in series).

[0059] like Figure 2 As shown, the coupling assembly includes a first gear 1031, a second gear 1032, a clutch 1033, a reducer 1034, and a differential 1035. The first gear 1031 is connected to the first motor assembly 101 and meshes with the second gear 1032. The second gear 1032 is connected to the second motor assembly 102. The clutch 1033 connects the second gear 1032 and the reducer 1034. The differential 1035 is connected to the reducer 1034 and is also connected to the wheel for transmitting torque to the wheel.

[0060] In the above process, the clutch 1033 is disengaged, and the first gear 1031 and the second gear 1032 mesh, which enables the mechanical connection between the first motor assembly 101 and the second motor assembly 102, and completes the bidirectional transmission of mechanical energy between the first motor assembly 101 and the second motor assembly 102. When the clutch 1033 is closed, mechanical energy can be transmitted to the wheels, and the wheels will eventually rotate. At the same time, the differential 1035 can achieve a high speed ratio transmission, with high transmission efficiency and torque transmission capability.

[0061] Secondly, this application also provides a vehicle including the dual-motor power system described above.

[0062] Since the vehicle provided in the second aspect includes a dual-motor powertrain, it possesses all the technical benefits of a dual-motor powertrain, which will not be elaborated upon here.

[0063] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0064] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0065] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0066] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A dual motor powertrain system, characterized by, include: The power mechanism includes a first motor assembly, a second motor assembly, and a coupling assembly. The coupling assembly is connected to the first motor assembly and the second motor assembly respectively, and is used to control the mechanical energy transmission between the first motor assembly and the second motor assembly after coupling them. A power supply mechanism is provided, which is connected to the first motor assembly and the second motor assembly respectively, to switch between charging mode and heating mode. The power supply mechanism includes a first battery pack, a second battery pack, a first switch and a second switch. The first battery pack and the second battery pack are connected in series to form a positive terminal, a negative terminal and an intermediate point. The positive terminal is connected to the positive terminal of the first motor assembly, the negative terminal is connected to the negative terminal of the second motor assembly, the first switch is connected to the negative terminal of the first motor assembly, and the second switch is connected to the positive terminal of the second motor assembly. When the heating mode is running, the first switch and the second switch are respectively connected to the intermediate point. When the charging mode is running, the coupling component couples the first motor assembly and the second motor assembly and cuts off their mechanical energy output, so that the first motor assembly operates in electric mode and the second motor assembly operates in power generation mode; when the heating mode is running, the coupling component couples the first motor assembly and the second motor assembly, so that the first motor assembly and the second motor assembly alternately operate in electric mode and power generation mode.

2. The dual electric motor power system of claim 1, wherein, The power supply mechanism includes a power battery, a first switch, and a second switch. The positive terminal of the power battery is connected to the first switch, the negative terminal of the power battery is connected to the negative terminal of the second motor assembly, the positive terminal of the second motor assembly is connected between the positive terminal of the power battery and the first switch, the negative terminal of the first motor assembly is connected between the negative terminal of the power battery and the negative terminal of the second motor assembly, and the positive terminal of the first motor assembly is connected to both the first switch and the second switch.

3. The dual electric motor power system of claim 2, wherein, When the charging mode is running, the first switch is off and the second switch is on.

4. The dual electric motor power system of claim 2, wherein, The power supply mechanism also includes a DC charging port, the positive terminal of which is connected to the second switch, and the negative terminal of which is connected to the negative terminal of the second motor assembly.

5. The dual electric motor power system of claim 1, wherein, The power supply mechanism includes a first battery pack and a second battery pack, wherein the first battery pack is connected to the first motor assembly and the second battery pack is connected to the second motor assembly.

6. The dual electric motor power system of claim 1, wherein, The first motor assembly includes a first inverter and a first motor structure, wherein the first inverter is connected to the first motor structure.

7. The dual electric motor power system of claim 1, wherein, The second motor assembly includes a second inverter and a second motor structure, wherein the second inverter is connected to the second motor structure.

8. According to claim 1 7. The dual-motor power system according to any one of the claims is characterized in that, The coupling assembly includes a first gear, a second gear, a clutch, a reducer, and a differential. The first gear is connected to the first motor assembly and meshes with the second gear. The second gear is connected to the second motor assembly. The clutch connects the second gear and the reducer. The differential is connected to the reducer.

9. A vehicle characterized by comprising: including the features of claim 1 8. The dual motor powertrain system of any one of claims 1-7.

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