Method and device for supplying power to a motor in a vehicle, processor and vehicle

Abstract

The application discloses a power supply method and device of a motor in a vehicle, a processor and the vehicle. The method can comprise: acquiring a torque demand value and state data of the vehicle, wherein the torque demand value is used to determine whether a first motor and a second motor in the vehicle are operated, and the state data is used to represent a state of a range extender in the vehicle; determining a target power generation power of the range extender based on the torque demand value and the state data; and controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation power, wherein the first motor is used to drive rear wheels of the vehicle, and the second motor is used to drive front wheels of the vehicle. The application solves the technical problem of low energy utilization rate in the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically, to a method, apparatus, processor, and vehicle for supplying power to an electric motor in a vehicle. Background Technology

[0002] In related technologies, the vehicle is in four-wheel drive mode regardless of whether the power system has a high or low power demand. However, this method results in a low overall efficiency of the power system, which is not conducive to improving the vehicle's driving range. Therefore, the technical problem of low energy utilization in the vehicle still exists.

[0003] There is currently no effective solution to the technical problem of low energy utilization in vehicles caused by the aforementioned technologies. Summary of the Invention

[0004] This invention provides a method, apparatus, processor, and vehicle for powering an electric motor in a vehicle, to at least solve the technical problem of low energy utilization in vehicles.

[0005] According to one aspect of the present invention, a method for supplying power to an electric motor in a vehicle is provided. The method may include: acquiring a torque demand value and status data of the vehicle, wherein the torque demand value is used to determine whether a first motor and a second motor in the vehicle are operating, and the status data is used to characterize the status of a range extender in the vehicle; determining a target power output of the range extender based on the torque demand value and the status data; and controlling the range extender to supply power to the first motor and / or the second motor based on the target power output, wherein the first motor is used to drive the rear wheels of the vehicle, and the second motor is used to drive the front wheels of the vehicle.

[0006] Optionally, controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation includes: in response to the status data indicating that the range extender is in a normal state, if the torque demand value is less than a torque threshold and the vehicle's electric power demand data is greater than or equal to the vehicle's battery power, controlling the range extender to supply power to the first motor based on the target power generation, wherein the electric power demand data is used to characterize the vehicle's overall electric power demand; or in response to the status data indicating that the range extender is in a normal state, if the torque demand value is greater than or equal to a torque threshold and the electric power demand data is greater than or equal to the battery power, controlling the range extender to supply power to the first motor and the second motor based on the target power generation.

[0007] Optionally, based on the target power generation, controlling the range extender to supply power to the first motor and / or the second motor includes: controlling the range extender to shut down in response to status data indicating that the range extender is in a fault state; or controlling the range extender to shut down in response to status data indicating that the range extender is in a normal state and the power demand data is less than the vehicle's battery power.

[0008] Optionally, before controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, the process includes: determining the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torque of the first motor and the second motor and the target threshold factor, wherein the target threshold factor is related to the vehicle's ambient temperature, the rate of change of accelerator pedal opening, and the state of the clutch device; and determining the torque threshold based on the front wheel torque threshold and the rear wheel torque threshold of the vehicle at the same speed.

[0009] Optionally, a first threshold factor is determined based on ambient temperature, wherein ambient temperature is positively correlated with the first threshold factor; a second threshold factor is determined based on the rate of change of accelerator pedal opening, wherein the rate of change of accelerator pedal opening is negatively correlated with the second threshold factor; a third threshold factor is determined based on the state of the clutch device, wherein the state of the clutch device includes normal state, disengagement fault state, and engagement fault state; and the minimum value among the first threshold factor, the second threshold factor, and the third threshold factor is determined as the target threshold factor.

[0010] Optionally, based on the target power generation, controlling the range extender to supply power to the first motor and / or the second motor includes: determining the difference between the power demand data and the battery power as the target power generation; if the target power generation is between two power generation data of the range extender, controlling the range extender to supply power to the vehicle's battery based on the difference between the maximum value of the two power generation data and the target power generation, wherein the power generation data is point data set based on the characteristics of the range extender; and controlling the range extender to supply power to the vehicle's first motor and / or the second motor based on the target power generation.

[0011] Optionally, the speed corresponding to the first motor and the speed corresponding to the second motor are determined based on the motor speed, front wheel radius and rear wheel radius corresponding to the first motor and the second motor, respectively; the vehicle speed is determined based on the speed corresponding to the first motor and the speed corresponding to the second motor.

[0012] According to another aspect of the present invention, a power supply device for a motor in a vehicle is also provided. The device may include: an acquisition unit for acquiring a torque demand value and status data of the vehicle, wherein the torque demand value is used to determine whether a first motor and a second motor in the vehicle are operating, and the status data is used to characterize the status of a range extender in the vehicle; a determination unit for determining a target power output of the range extender based on the torque demand value and the status data; and a control unit for controlling the range extender to supply power to the first motor and / or the second motor based on the target power output, wherein the first motor is used to drive the rear wheels of the vehicle, and the second motor is used to drive the front wheels of the vehicle.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the power supply method for a motor in a vehicle according to the embodiments of the present invention.

[0014] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program, when running, executes the power supply method for a motor in a vehicle according to the embodiments of the present invention.

[0015] According to another aspect of the present invention, a vehicle is also provided. This vehicle is used to perform the vehicle motor power supply method of the present invention embodiments.

[0016] In this embodiment of the invention, the torque demand value and status data of the vehicle are obtained, wherein the torque demand value is used to determine whether the first motor and the second motor in the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle; based on the torque demand value and status data, the target power generation of the range extender is determined; based on the target power generation, the range extender is controlled to supply power to the first motor and / or the second motor, wherein the first motor is used to drive the rear wheels of the vehicle, and the second motor is used to drive the front wheels of the vehicle. In other words, the embodiments of the present invention can collect the torque demand value of the vehicle to determine whether the first motor operates alone or the first and second motors operate together. It can also determine the state data of the range extender based on various parameters of the range extender. By analyzing the torque demand value and the state data, the target power generation of the range extender can be determined. Based on the target power generation, the range extender can supply power to the first motor or the first and second motors. By considering different situations and determining whether the range extender needs to supply power and which motor to supply power to, the optimal working state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing the vehicle's driving range when the power demand is low, thereby solving the technical problem of low energy utilization in the vehicle and realizing the technical effect of improving the energy utilization rate in the vehicle. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart of a power supply method for a motor in a vehicle according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of a vehicle power system according to an embodiment of the present invention;

[0020] Figure 3This is a schematic diagram illustrating the relationship between the power generation of a range extender and the target power generation according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a power supply device for an electric motor in a vehicle according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] Example 1

[0025] According to an embodiment of the present invention, an embodiment of a method for supplying power to a motor in a vehicle is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0026] Figure 1 This is a flowchart of a power supply method for a motor in a vehicle according to an embodiment of the present invention, such as... Figure 1 As shown, the method may include the following steps:

[0027] Step S102: Obtain the torque demand value and status data of the vehicle. The torque demand value is used to determine whether the first motor and the second motor in the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle.

[0028] In the technical solution provided in step S102 of the present invention, the driver's torque demand value for the vehicle can be obtained, as well as the status data of the range extender in the vehicle. The torque demand value can be the wheel-end torque demand of the vehicle, which can be used to determine whether the first motor and the second motor in the vehicle are operating. The status data can be used to characterize the status of the range extender in the vehicle, and can include normal and fault states. The range extender can be used to supply power to the first motor, the second motor, and the battery in the vehicle. The battery can be a power battery. The vehicle can be a range-extended electric vehicle. The first motor can be used to drive the rear wheels of the vehicle, and the second motor can be used to drive the front wheels of the vehicle.

[0029] Optionally, when the driver operates the accelerator pedal or other components in the vehicle, data such as the accelerator pedal opening and its rate of change can be collected to determine the driver's torque demand at the wheels. This torque demand value is then used to determine whether the first motor operates alone or whether the first and second motors operate together in the vehicle's powertrain. The vehicle's powertrain may include at least a vehicle controller, a battery management system, a vehicle stability control unit, a battery, a range extender, a first motor controller, a second motor controller, a first motor, a second motor, a first differential, a second differential, a clutch controller, a first reducer, and a second reducer. The first motor can be connected to the first reducer and can drive the rear wheels of the vehicle through the first differential; the second motor can be connected to the second reducer and can drive the front wheels of the vehicle through the second differential. A clutch controller connects the second reducer and the second differential. According to the needs of the vehicle, the clutch device can be controlled to disengage or engage through the clutch device controller. When the clutch is engaged, the first motor and the second reducer are connected, and the front wheels of the vehicle are driven through the second differential. When the clutch is disengaged, the second reducer is disconnected from the second differential and does not participate in driving the front wheels of the vehicle.

[0030] In this embodiment of the invention, a first motor and a second motor can be deployed in the vehicle's power system. A range extender can supply power to either the first motor or the second motor, enabling either the first motor or the second motor to achieve two-wheel drive or four-wheel drive mode, thus solving the technical problem in related technologies where vehicles can only operate in four-wheel drive. It should be noted that this is merely an illustrative example and does not impose specific limitations on the components included in the power system. Any power system that contains a first motor and a second motor, controls the range extender to supply power to both motors under different conditions, and uses excess energy to charge the battery, falls within the protection scope of this embodiment of the invention.

[0031] Optionally, the status data of the range extender can be determined by data such as the vehicle's voltage and the pressure of the range extender. If the range extender is in a fault state, it can be controlled to stop and not participate in power supply. If the range extender is in a normal state, the torque demand value can be further determined to determine whether the range extender participates in power supply and which motor it supplies power to.

[0032] For example, the relationship between the torque demand value and the torque threshold can be determined. If the torque demand value is less than the torque threshold, it indicates that the clutch is disengaged, and the first motor in the vehicle's power system is running while the second motor is stopped, indicating that the vehicle is in two-wheel drive mode. If the torque demand value is greater than or equal to the torque threshold, the clutch can be engaged as needed, allowing the first and second motors in the power system to work together, indicating that the vehicle is in four-wheel drive mode.

[0033] Step S104: Based on the torque demand value and status data, determine the target power generation of the range extender.

[0034] In the technical solution provided by step S104 of the present invention, after obtaining the torque demand value of the vehicle and the status data of the range extender, the target power generation of the range extender to supply power to the first motor and the second motor can be determined based on the torque demand value and the status data. The status data may include at least the motor speed, electric accessory power and electric power of the first motor and the second motor.

[0035] Optionally, the vehicle's current electric power demand data can be determined by combining the motor speed, the current power of the electric accessories, and the electric power at the previous moment. Based on the electric power demand data, the difference between the electric power demand data and the vehicle's battery power can be determined as the target power generation of the range extender. Here, the electric power demand data can be the vehicle's overall electric power demand, and the battery power can be the power capacity of the power battery.

[0036] For example, based on the characteristics of the range extender itself, multiple power generation data can be set. If the difference between the power demand data and the battery power is between the two power generation data, the power generation of the range extender can be determined as the larger value of the two power generation data. The difference between the larger value of the power generation data and the difference between the power demand data and the battery power can be determined as the power of the range extender to charge the power battery.

[0037] In this embodiment of the invention, the excess power generated by the range extender, excluding the portion used to power the first and second motors, can be used to charge the power battery. This prevents the excess energy from being wasted, and the extra power from the battery can then be used to power the vehicle, thereby increasing the vehicle's driving range. This addresses the technical problem of low energy utilization in the vehicle and achieves the technical effect of improving energy utilization in the vehicle.

[0038] Step S106: Based on the target power generation, control the range extender to supply power to the first motor and / or the second motor, wherein the first motor is used to drive the rear wheels of the vehicle and the second motor is used to drive the front wheels of the vehicle.

[0039] In the technical solution of step S106 of the present invention, after determining the target power generation of the range extender based on the torque demand value and the status data, it can be determined whether the range extender does not supply power, supplies power to the first motor, or supplies power to both the first motor and the second motor, based on the target power generation, the status data, and the torque demand value.

[0040] Optionally, the system can determine the vehicle's electric power demand data and the battery power, determine whether the status data indicates that the range extender is in a normal state, and determine the relationship between the torque demand value and the torque threshold. Based on the above judgment process, it can determine whether the range extender is supplying power. If it is supplying power, it can determine whether the range extender is supplying power to the first motor or the first and second motors.

[0041] For example, if the torque demand value is less than the torque threshold and the range extender is in normal condition, and the power demand data is greater than or equal to the power capacity of the power battery, it can be concluded that the clutch device is in a disengaged state and the first motor is running independently. The target power generation capacity for supplying power to the first motor can be determined based on the power demand data, thereby controlling the range extender to supply power to the first motor based on the target power generation capacity.

[0042] In related technologies, vehicles are always in four-wheel drive mode regardless of torque demand, resulting in energy loss and low energy utilization. In this invention, by determining the torque demand and whether the range extender is in normal operation, the target power output for the first and second motors can be further determined. Based on the torque demand and range extender status data, the electrical power demand can be determined. Using the torque demand, status data, and electrical power demand data, it can be determined whether the range extender participates in power supply and which motor it supplies power to. By considering different situations to determine whether the range extender needs power and which motor it supplies power to, the optimal operating state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing vehicle range when power demand is low, thereby solving the problem of low energy utilization and improving the overall energy efficiency of the vehicle.

[0043] In steps S102 to S106 of this application, the torque demand value and status data of the vehicle are obtained. The torque demand value is used to determine whether the first motor and the second motor in the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle. Based on the torque demand value and status data, the target power generation of the range extender is determined. Based on the target power generation, the range extender is controlled to supply power to the first motor and / or the second motor, wherein the first motor is used to drive the rear wheels of the vehicle, and the second motor is used to drive the front wheels of the vehicle. In other words, the embodiments of the present invention can collect the torque demand value of the vehicle to determine whether the first motor operates alone or the first and second motors operate together. It can also determine the state data of the range extender based on various parameters of the range extender. By analyzing the torque demand value and the state data, the target power generation of the range extender can be determined. Based on the target power generation, the range extender can supply power to the first motor or the first and second motors. By considering different situations and determining whether the range extender needs to supply power and which motor to supply power to, the optimal working state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing the vehicle's driving range when the power demand is low, thereby solving the technical problem of low energy utilization in the vehicle and realizing the technical effect of improving the energy utilization rate in the vehicle.

[0044] The method described in this embodiment will be further described below.

[0045] As an optional embodiment, step S106, controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, includes: in response to the status data indicating that the range extender is in a normal state, if the torque demand value is less than a torque threshold and the vehicle's electric power demand data is greater than or equal to the vehicle's battery power, controlling the range extender to supply power to the first motor based on the target power generation, wherein the electric power demand data is used to characterize the vehicle's overall electric power demand; or in response to the status data indicating that the range extender is in a normal state, if the torque demand value is greater than or equal to a torque threshold and the electric power demand data is greater than or equal to the battery power, controlling the range extender to supply power to the first motor and the second motor based on the target power generation.

[0046] In this embodiment, during the process of controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, the system can determine whether the range extender is in a normal state, the relationship between the torque demand value and the torque threshold, and the relationship between the vehicle's electric power demand data and the battery power. This allows the system to determine whether the range extender should supply power and to which motor it should supply power. If the status data indicates that the range extender is in a normal state, the torque demand value is less than the torque threshold, and the electric power demand data is greater than or equal to the battery power, it indicates that the range extender needs to switch from standby to power supply operation, and the system controls the range extender to supply power to the first motor based on the target power generation. If the status data indicates that the range extender is in a normal state, the torque demand value is greater than or equal to the torque threshold, and the electric power demand data is greater than or equal to the battery power, it indicates that the range extender needs to switch from standby to power supply operation, and the system controls the range extender to supply power to the first motor and the second motor based on the target power generation. The electric power demand data can be used to characterize the vehicle's overall electric power demand and can be referred to as the range extender's power demand. The battery power can be the power energy of the power battery. The torque threshold can be a wheel-end torque threshold, which can be a preset value or a value set according to actual conditions. It is related to factors such as the vehicle's ambient temperature, accelerator pedal opening, vehicle speed, external characteristics of the motor system, and reducer ratio. It should be noted that no specific restrictions are placed on the magnitude of the torque threshold here.

[0047] Optionally, if the status data indicates that the range extender is in normal operation, the torque demand is less than the torque threshold, and the electrical power demand is greater than or equal to the battery power, it indicates that the clutch is disengaged, and the first motor operates independently. In this case, the range extender can supply power to the first motor. The range extender in standby mode can be woken up, and it can then supply power to the first motor or the first motor and the power battery based on the electrical power demand data. The difference between the electrical power demand data and the battery power can be determined as the target power output, and the range extender can be controlled to supply power to the first motor based on this target power output. If the target power output is between two power output data points of the range extender, the difference between the larger of the two power output data points and the target power output can be determined as the power supplied to the battery, and the range extender can be controlled to charge the battery based on this power. If the target power output data equals one of the range extender's power output data points, then no additional power supply to the power battery is required.

[0048] Optionally, if the status data indicates that the range extender is in normal condition, the torque demand value is greater than or equal to the torque threshold, and the electric power demand data is greater than or equal to the battery power, it indicates that the clutch device needs to be engaged, and the first motor and the second motor operate together. At this time, the range extender can supply power to the first motor and the second motor. The range extender in standby mode can be woken up, and at this time, it can supply power to the first motor and the second motor, or the first motor, the second motor, and the power battery, based on the electric power demand data. The difference between the electric power demand data and the battery power can be determined as the target power generation, and the range extender can be controlled to supply power to the first motor and the second motor based on the target power generation. If the target power generation is between two power generation data points of the range extender, the difference between the larger of the two power generation data points and the target power generation can be determined as the power to supply power to the battery, and the range extender can be controlled to charge the battery based on this power. If the target power generation data is equal to one of the power generation data points of the range extender, then no additional power supply to the power battery is required.

[0049] As an optional embodiment, step S106, based on the target power generation, controls the range extender to supply power to the first motor and / or the second motor, including: controlling the range extender to stop in response to status data indicating that the range extender is in a fault state; or controlling the range extender to stop in response to status data indicating that the range extender is in a normal state and the power demand data is less than the vehicle's battery power.

[0050] In this embodiment, during the process of controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, if the status data indicates that the range extender is in a fault state, it means that the range extender has malfunctioned. Regardless of whether the range extender needs to supply power to the first and second motors at this time, the range extender is in a stopped state and does not participate in power supply. If the status data indicates that the range extender is in a normal state, and the power demand data is less than the vehicle's battery power, the range extender can be controlled to be in a stopped state regardless of whether the torque demand value is less than the torque threshold.

[0051] In related technologies, vehicles operate in four-wheel drive mode regardless of whether the vehicle's power system requires high or low power. However, this still results in low energy utilization. In this invention, when power demand is low, the range extender can be controlled to supply power only to the first motor. If excess power is available, it can be used to charge the battery, reducing energy loss. Conversely, when power demand is low, such as when the battery power is sufficient for the vehicle's needs, the range extender can be shut down to further reduce energy consumption. This solves the problem of low energy utilization and improves the overall energy efficiency of the vehicle.

[0052] As an optional embodiment, step S106, before controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, includes: determining the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torque of the first motor and the second motor and the target threshold factor, wherein the target threshold factor is related to the vehicle's ambient temperature, the rate of change of accelerator pedal opening, and the state of the clutch device; and determining the torque threshold based on the front wheel torque threshold and the rear wheel torque threshold of the vehicle at the same speed.

[0053] In this embodiment, before controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, the following steps can also be performed: The rear wheel torque threshold corresponding to the first motor can be determined based on the motor torque of the first motor and the target threshold factor; the front wheel torque threshold corresponding to the second motor can be determined based on the motor torque of the second motor and the target threshold factor. Then, the front wheel torque threshold and the rear wheel torque threshold at the same vehicle speed can be determined as the torque threshold, wherein the target threshold factor can be related to the vehicle's ambient temperature, the rate of change of accelerator pedal opening, and the state of the clutch device.

[0054] For example, based on the motor torque of the first or second motor and the target threshold factor, the torque threshold of the corresponding wheel can be determined using the following formula:

[0055] T 车轮=tq*i0*i g *σ

[0056] Among them, T 车轮 It can be used to represent the front wheel torque threshold and the rear wheel torque threshold; tq can be used to represent the motor torque of the first motor or the second motor; i0 can be used to represent the transmission ratio of the vehicle; i g It can be used to represent the speed ratio of a vehicle's reducer; σ can be used to represent the target threshold factor.

[0057] Optionally, after determining the front wheel torque threshold and the rear wheel torque threshold, the sum of the front wheel torque threshold and the rear wheel torque threshold at the same vehicle speed can be determined as the torque threshold at that vehicle speed. It should be noted that this is merely an illustrative example and does not impose specific limitations on the process and method for determining the torque threshold.

[0058] As an optional embodiment, in step S106, a first threshold factor is determined based on ambient temperature, wherein ambient temperature is positively correlated with the first threshold factor; a second threshold factor is determined based on the rate of change of accelerator pedal opening, wherein the rate of change of accelerator pedal opening is negatively correlated with the second threshold factor; a third threshold factor is determined based on the state of the clutch device, wherein the state of the clutch device includes a normal state, a disengagement fault state, and an engagement fault state; and the minimum value among the first threshold factor, the second threshold factor, and the third threshold factor is determined as the target threshold factor.

[0059] In this embodiment, during the process of determining the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torques of the first motor and the second motor and the target threshold factor, the first threshold factor can be determined based on ambient temperature, the second threshold factor can be determined based on the accelerator pedal opening change rate, or the third threshold factor can be determined based on the state of the clutch device. Then, the minimum value among the first, second, and third threshold factors is determined as the target threshold factor. Ambient temperature is positively correlated with the first threshold factor; that is, the lower the ambient temperature, the smaller the first threshold factor. The accelerator pedal opening change rate is negatively correlated with the second threshold factor; that is, the smaller the accelerator pedal opening change rate, the larger the second threshold factor. The state of the clutch device can include a normal state, a disengagement fault state, and an engagement fault state.

[0060] Optionally, the ambient temperature of the vehicle can be divided into different temperature ranges, and the magnitude of the first threshold factor in each temperature range can be determined. Alternatively, the rate of change of the accelerator pedal opening of the vehicle can be divided into different ranges, and the magnitude of the second threshold factor in each range can be determined.

[0061] For example, ambient temperature can be divided into three temperature ranges: >10℃, -10℃~10℃, and <-10℃. The first threshold factor for the temperature range >10℃ can be determined as 0.7. Similarly, the first threshold factors for each of the three temperature ranges can be determined. The smaller the first threshold factor, the earlier the clutch needs to engage, allowing the first and second motors to operate in conjunction. The accelerator pedal opening change rate (% / s) can be divided into >200, 100~200, and <100. The second threshold factor for the range >200 can be determined as 0.4. And so on, the second threshold factors for each of the three ranges can be determined.

[0062] For example, the clutch device can be in a normal state, a disengagement fault state, or an engagement fault state. When in a normal state, the third threshold factor can be set to 0.7; when in a disengagement fault state, the clutch device can be controlled to engage directly, and the third threshold factor can be set to 0; when in an engagement fault state, the clutch device can be controlled to disengage directly, and the third threshold factor can be set to 5.

[0063] It should be noted that this is only an example and no specific restrictions are placed on the determination method, process, or final value of the first, second, and third threshold factors.

[0064] As an optional embodiment, step S106, controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, includes: determining the difference between the power demand data and the battery power as the target power generation; if the target power generation is between two power generation data of the range extender, controlling the range extender to supply power to the vehicle's battery based on the difference between the maximum value of the two power generation data and the target power generation, wherein the power generation data is point data set based on the characteristics of the range extender; and controlling the range extender to supply power to the vehicle's first motor and / or the second motor based on the target power generation.

[0065] In this embodiment, during the process of controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, the difference between the power demand data and the battery power can be determined as the target power generation. It is then determined whether the target power generation matches one of the multiple power generation data points of the range extender. If so, the range extender can be directly controlled to supply power to the first motor and / or the second motor based on the target power generation, without needing to supply power to the battery. If not, it indicates that the target power generation must be between two power generation data points. The difference between the maximum value of the two power generation data points and the target power generation can be determined as the power required to supply power to the battery. Based on this power generation, the range extender is controlled to supply power to the vehicle's battery, and it can also be controlled to supply power to the first motor and / or the second motor based on the target power generation. The power generation data of the range extender can be point data set based on the characteristics of the range extender.

[0066] Optionally, based on the characteristics of the range extender itself, n power generation data points can be set, where these n power generation data points can be P1, P2, P3, ..., P... n The difference between the power demand data and the battery power, i.e., the target power generation, can be determined as P. x It can be determined whether the target power generation is equal to P1, P2, P3, ..., P n Any one of them, suppose P x equals P n Based on the target power generation, the range extender can be directly controlled to supply power to the first motor and / or the second motor, without requiring power from the battery. Assume P... x At P m-1 and P m Between these values, it can be explained that the power generation of the range extender is P. m The range extender is controlled based on excess electric power P. m -P x Power the battery and control the range extender based on the target power generation P. x Power is supplied to the first motor and / or the second motor, eliminating the need for battery power.

[0067] As an optional embodiment, in step S106, the speed corresponding to the first motor and the speed corresponding to the second motor are determined based on the motor speed, front wheel radius and rear wheel radius corresponding to the first motor and the second motor, respectively; and the vehicle speed is determined based on the speed corresponding to the first motor and the speed corresponding to the second motor.

[0068] In this embodiment, the vehicle speed corresponding to the first motor can be determined based on the motor speed and rear wheel radius of the first motor, and the vehicle speed corresponding to the second motor can be determined based on the motor speed and front wheel radius of the second motor. The vehicle speed can be determined based on the vehicle speed of the first motor and the vehicle speed of the second motor.

[0069] For example, based on the motor speed of the first motor or the second motor and the corresponding wheel radius, the vehicle speed corresponding to the first motor or the second motor can be determined using the following formula:

[0070]

[0071] Where u can represent the vehicle speed corresponding to the first or second motor, with units of km / h; n can represent the motor speed of the first or second motor; r can represent the rear wheel radius corresponding to the first motor or the front wheel radius corresponding to the second motor; i0 can represent the transmission ratio; i g It can be used to indicate the speed ratio of a speed reducer.

[0072] Optionally, the final vehicle speed can be determined by combining the speed of the vehicle corresponding to the first motor and the speed of the vehicle corresponding to the second motor. It should be noted that no specific restrictions are placed on the method and process for determining the vehicle speed based on the speeds of the vehicles corresponding to the two motors.

[0073] In this embodiment of the invention, the torque demand value and status data of the vehicle are obtained, wherein the torque demand value is used to determine whether the first motor and the second motor in the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle; based on the torque demand value and status data, the target power generation of the range extender is determined; based on the target power generation, the range extender is controlled to supply power to the first motor and / or the second motor, wherein the first motor is used to drive the rear wheels of the vehicle, and the second motor is used to drive the front wheels of the vehicle. In other words, the embodiments of the present invention can collect the torque demand value of the vehicle to determine whether the first motor operates alone or the first and second motors operate together. It can also determine the state data of the range extender based on various parameters of the range extender. By analyzing the torque demand value and the state data, the target power generation of the range extender can be determined. Based on the target power generation, the range extender can supply power to the first motor or the first and second motors. By considering different situations and determining whether the range extender needs to supply power and which motor to supply power to, the optimal working state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing the vehicle's driving range when the power demand is low, thereby solving the technical problem of low energy utilization in the vehicle and realizing the technical effect of improving the energy utilization rate in the vehicle.

[0074] Example 2

[0075] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0076] Currently, vehicles are in four-wheel drive mode regardless of whether the power system requires a large or small amount of power. However, this results in a low overall efficiency of the power system, which is not conducive to improving the vehicle's driving range. Therefore, the technical problem of low energy utilization in vehicles still exists.

[0077] One related technology proposes a torque distribution method for dual-motor range-extended hybrid vehicles, including torque distribution methods for single-motor mode, dual-motor mode, series mode, and parallel mode. The corresponding system is also disclosed. This method, in different modes, combines the vehicle's state with consideration of vehicle speed and pedal opening value to distribute torque smoothly, ensuring that the dual-motor range-extended hybrid vehicle is energy-efficient, environmentally friendly, and highly reliable.

[0078] However, the above method does not take into account whether the range extender needs power supply under different conditions, or whether the range extender has excess energy to charge the battery. Therefore, the technical problem of low energy utilization in the vehicle still exists.

[0079] To address the aforementioned problems, this invention proposes a method for powering a motor in a vehicle. This method may include: collecting the vehicle's torque demand value to determine whether a first motor operates alone or both the first and second motors operate together; determining the range extender's status data based on various parameters of the range extender; determining the target power output of the range extender based on the torque demand value and status data; and supplying power to the first motor or both the first and second motors via the range extender based on the target power output. By considering different situations to determine whether the range extender needs power and which motor to supply, the optimal operating state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing vehicle range when power demand is low, thereby solving the technical problem of low energy utilization in vehicles and realizing the technical effect of improving energy utilization in vehicles.

[0080] The embodiments of the present invention will be further described below.

[0081] In this embodiment, when the driver operates the accelerator pedal and other components in the vehicle, data such as the opening degree and the rate of change of the opening degree of the accelerator pedal can be collected to determine the torque demand value of the driver at the wheel end. Based on the torque demand value, it can be determined whether the first motor runs alone or the first motor and the second motor run together in the vehicle's power system.

[0082] Optionally, Figure 2 This is a schematic diagram of a vehicle power system according to an embodiment of the present invention, such as... Figure 2 As shown, the vehicle's powertrain system may include a vehicle controller 201, a battery management system 202, a vehicle stability control unit 203, a battery 204, a range extender 205, a first motor controller 206, a second motor controller 207, a first motor 208, a second motor 209, a clutch controller 210, a first reducer 211, and a second reducer 212. The first motor can be connected to the first reducer and can drive the rear wheels of the vehicle through the first differential; the second motor can be connected to the second reducer and can drive the front wheels of the vehicle through the second differential. A clutch controller connects the second reducer and the second differential. The clutch controller can control the clutch to disengage or engage according to the vehicle's requirements. When the clutch is engaged, the first motor and the second reducer are connected, driving the front wheels of the vehicle through the second differential; when the clutch is disengaged, the second reducer is disconnected from the second differential and does not participate in driving the front wheels of the vehicle.

[0083] Optionally, the status data of the range extender can be determined by data such as the vehicle's voltage and the pressure of the range extender. If the range extender is in a fault state, it can be controlled to stop and not participate in power supply. If the range extender is in a normal state, the torque demand value can be further determined to determine whether the range extender participates in power supply and which motor it supplies power to.

[0084] In this embodiment, the vehicle's current electric power demand data can be determined by combining the motor speed, the current power of the electric accessories, and the electric power at the previous moment. Based on the electric power demand data, the difference between the electric power demand data and the vehicle's battery power can be determined as the target power generation power of the range extender.

[0085] For example, based on the characteristics of the range extender itself, multiple power generation data can be set. If the difference between the power demand data and the battery power is between the two power generation data, the power generation of the range extender can be determined as the larger value of the two power generation data. The difference between the larger value of the power generation data and the difference between the power demand data and the battery power can be determined as the power of the range extender to charge the power battery.

[0086] For another example, based on the characteristics of the range extender itself, n power generation data points can be set, which can be P1, P2, P3, ..., P... n The difference between the power demand data and the battery power, i.e., the target power generation, can be determined as P. x It can be determined whether the target power generation is equal to P1, P2, P3, ..., Pn Any one of them, suppose P x equals P n Based on the target power generation, the range extender can be directly controlled to supply power to the first motor and / or the second motor, without requiring power from the battery. Assume P... x At P m-1 and P m Between these values, it can be explained that the power generation of the range extender is P. m The range extender is controlled based on excess electric power P. m -P x Power the battery and control the range extender based on the target power generation P. x Power is supplied to the first motor and / or the second motor, eliminating the need for battery power. Figure 3 This is a schematic diagram illustrating the relationship between the power output of a range extender and the target power output according to an embodiment of the present invention, as shown below. Figure 3 As shown in the graph, which shows the relationship between the range extender's power generation and the power demand data, the horizontal axis can be the target power generation, and the vertical axis can be the range extender's power generation data. If the target power generation is between P1 and P2, then the range extender's power generation data can be determined as P2. The remaining power can be used to charge the vehicle's power battery.

[0087] In this embodiment, the vehicle's electric power demand data and battery power can be determined, as can the status data to determine whether the range extender is in a normal state, and the relationship between the torque demand value and the torque threshold can be determined. Based on the above determination process, it can be determined whether the range extender is supplying power. If it is supplying power, it can be determined whether the power supply object of the range extender is the first motor or the first motor and the second motor.

[0088] Optionally, the rear wheel torque threshold corresponding to the first motor can be determined based on the motor torque of the first motor and the target threshold factor, and the front wheel torque threshold corresponding to the second motor can be determined based on the motor torque of the second motor and the target threshold factor. Then, the front wheel torque threshold and the rear wheel torque threshold at the same vehicle speed can be determined as the torque threshold.

[0089] In related technologies, vehicles operate in four-wheel drive mode regardless of whether the vehicle's power system requires high or low power. However, this still results in low energy utilization. In this invention, when power demand is low, the range extender can be controlled to supply power only to the first motor. If excess power is available, it can be used to charge the battery, reducing energy loss. Conversely, when power demand is low, such as when the battery power is sufficient for the vehicle's needs, the range extender can be shut down to further reduce energy consumption. This solves the problem of low energy utilization and improves the overall energy efficiency of the vehicle.

[0090] For example, based on the motor torque of the first or second motor and the target threshold factor, the torque threshold of the corresponding wheel can be determined using the following formula:

[0091] T 车轮 =tq*i0*i g *σ

[0092] Among them, T 车轮 It can be used to represent the front wheel torque threshold and the rear wheel torque threshold; tq can be used to represent the motor torque of the first motor or the second motor; i0 can be used to represent the transmission ratio of the vehicle; i g It can be used to represent the speed ratio of a vehicle's reducer; σ can be used to represent the target threshold factor.

[0093] Optionally, the vehicle speed corresponding to the first motor can be determined based on the motor speed and rear wheel radius of the first motor, or the vehicle speed corresponding to the second motor can be determined based on the motor speed and front wheel radius of the second motor, or the vehicle speed can be determined based on the vehicle speed of the first motor and the vehicle speed of the second motor.

[0094] For example, based on the motor speed of the first motor or the second motor and the corresponding wheel radius, the vehicle speed corresponding to the first motor or the second motor can be determined using the following formula:

[0095]

[0096] Where u can represent the vehicle speed corresponding to the first or second motor, with units of km / h; n can represent the motor speed of the first or second motor; r can represent the rear wheel radius corresponding to the first motor or the front wheel radius corresponding to the second motor; i0 can represent the transmission ratio; i g It can be used to indicate the speed ratio of a speed reducer.

[0097] Optionally, the final vehicle speed can be determined by combining the speed of the vehicle corresponding to the first motor and the speed of the vehicle corresponding to the second motor. It should be noted that no specific restrictions are placed on the method and process for determining the vehicle speed based on the speeds of the vehicles corresponding to the two motors.

[0098] Optionally, after determining the front wheel torque threshold and the rear wheel torque threshold, the sum of the front wheel torque threshold and the rear wheel torque threshold at the same vehicle speed can be determined as the torque threshold at that vehicle speed. It should be noted that this is merely an illustrative example and does not impose specific limitations on the process and method for determining the torque threshold.

[0099] Optionally, in the process of determining the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torque of the first motor and the second motor and the target threshold factor, the first threshold factor can be determined based on the ambient temperature, the second threshold factor can be determined based on the rate of change of the accelerator pedal opening, and the third threshold factor can be determined based on the state of the clutch device. Then, the minimum value among the first threshold factor, the second threshold factor and the third threshold factor is determined as the target threshold factor.

[0100] Table 1. Results of the first threshold factor determined based on ambient temperature.

[0101]

[0102]

[0103] For example, Table 1 shows the results of a first threshold factor determined based on ambient temperature according to an embodiment of the present invention. As shown in Table 1, the ambient temperature can be divided into three temperature ranges: >10℃, -10℃~10℃, and <-10℃. The first threshold factor for the temperature range >10℃ can be determined to be 0.7. Similarly, the first threshold factors corresponding to the three temperature ranges can be determined. The smaller the first threshold factor, the earlier the clutch device needs to engage, so that the first motor and the second motor can operate together. When the first threshold factor is 0, the clutch device can be controlled to engage directly.

[0104] Table 2 shows the results of the second threshold factor determined based on the rate of change of accelerator pedal opening.

[0105] Serial Number Accelerator pedal opening change rate (%) Second threshold factor 1 >200 0.4 2 100～200 0.5 3 <100 0.7

[0106] For another example, Table 2 is a result table of the second threshold factor determined based on the accelerator pedal opening change rate according to an embodiment of the present invention. As shown in Table 2, the accelerator pedal opening change rate (% / s) can be divided into >200, 100~200 and <100. The second threshold factor for the range >200 can be determined as 0.4. Similarly, the second threshold factors corresponding to the three ranges can be determined.

[0107] Table 3 shows the results of the third threshold factor determined based on the state of the clutch assembly.

[0108] Serial Number clutch device status Second threshold factor 1 normal 0.7 2 Separation fault 0 3 Combined with fault 5

[0109] As an optional example, Table 3 is a result table of the third threshold factor determined based on the state of the clutch device according to an embodiment of the present invention. As shown in Table 3, the state of the clutch device can be a normal state, a disengagement fault state, and an engagement fault state. When it is in a normal state, the third threshold factor can be set to 0.7; when it is in a disengagement fault state, the clutch device can be controlled to engage directly and the third threshold factor can be set to 0; when it is in an engagement fault state, the clutch device can be controlled to disengage directly and the third threshold factor can be set to 5.

[0110] It should be noted that this is only an example and no specific restrictions are placed on the determination method, process, or final value of the first, second, and third threshold factors.

[0111] Optionally, if the status data indicates that the range extender is in normal operation, the torque demand is less than the torque threshold, and the electrical power demand is greater than or equal to the battery power, it indicates that the clutch is disengaged, and the first motor operates independently. In this case, the range extender can supply power to the first motor. The range extender in standby mode can be woken up, and it can then supply power to the first motor or the first motor and the power battery based on the electrical power demand data. The difference between the electrical power demand data and the battery power can be determined as the target power output, and the range extender can be controlled to supply power to the first motor based on this target power output. If the target power output is between two power output data points of the range extender, the difference between the larger of the two power output data points and the target power output can be determined as the power supplied to the battery, and the range extender can be controlled to charge the battery based on this power. If the target power output data equals one of the range extender's power output data points, then no additional power supply to the power battery is required.

[0112] Optionally, if the status data indicates that the range extender is in normal condition, the torque demand value is greater than or equal to the torque threshold, and the electric power demand data is greater than or equal to the battery power, it indicates that the clutch device needs to be engaged, and the first motor and the second motor operate together. At this time, the range extender can supply power to the first motor and the second motor. The range extender in standby mode can be woken up, and at this time, it can supply power to the first motor and the second motor, or the first motor, the second motor, and the power battery, based on the electric power demand data. The difference between the electric power demand data and the battery power can be determined as the target power generation, and the range extender can be controlled to supply power to the first motor and the second motor based on the target power generation. If the target power generation is between two power generation data points of the range extender, the difference between the larger of the two power generation data points and the target power generation can be determined as the power to supply power to the battery, and the range extender can be controlled to charge the battery based on this power. If the target power generation data is equal to one of the power generation data points of the range extender, then no additional power supply to the power battery is required.

[0113] Optionally, if the status data indicates that the range extender is in a fault state, it means that the range extender has malfunctioned. Regardless of whether the range extender needs to supply power to the first and second motors at this time, the range extender will be in a stopped state and will not participate in power supply. If the status data indicates that the range extender is in a normal state, and the power demand data is less than the vehicle's battery power, the range extender can be controlled to be in a stopped state regardless of whether the torque demand value is less than the torque threshold.

[0114] This invention can collect the torque demand value of a vehicle to determine whether the first motor operates alone or the first and second motors operate together. It can also determine the state data of the range extender based on various parameters of the range extender. By analyzing the torque demand value and the state data, the target power output of the range extender can be determined. Based on the target power output, the range extender can supply power to the first motor or the first and second motors. By considering different situations and determining whether the range extender needs power and which motor to supply power to, the optimal operating state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing the vehicle's driving range when the power demand is low, thereby solving the technical problem of low energy utilization in vehicles and realizing the technical effect of improving the energy utilization rate of vehicles.

[0115] Example 3

[0116] According to an embodiment of the present invention, a power supply device for a motor in a vehicle is also provided. It should be noted that this power supply device for a motor in a vehicle can be used to execute the power supply method for a motor in a vehicle described in Embodiment 1.

[0117] Figure 4This is a schematic diagram of a power supply device for a motor in a vehicle according to an embodiment of the present invention. Figure 4 As shown, the power supply device 400 for the motor in the vehicle may include: an acquisition unit 402, a determination unit 404, and a control unit 406.

[0118] The acquisition unit 402 is used to acquire the torque demand value and status data of the vehicle. The torque demand value is used to determine whether the first motor and the second motor in the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle.

[0119] The determination unit 404 is used to determine the target power generation of the range extender based on the torque demand value and status data.

[0120] Control unit 406 is used to control the range extender to supply power to the first motor and / or the second motor based on the target power generation, wherein the first motor is used to drive the rear wheels of the vehicle and the second motor is used to drive the front wheels of the vehicle.

[0121] Optionally, the control unit 406 includes: a first control module, configured to, in response to the status data indicating that the range extender is in a normal state, control the range extender to supply power to the first motor if the torque demand value is less than a torque threshold and the vehicle's electric power demand data is greater than or equal to the vehicle's battery power, wherein the electric power demand data is used to characterize the vehicle's overall electric power demand; and a second control module, configured to, in response to the status data indicating that the range extender is in a normal state, control the range extender to supply power to the first motor and the second motor based on a target power generation capacity if the torque demand value is greater than or equal to a torque threshold and the electric power demand data is greater than or equal to the battery power.

[0122] Optionally, the control unit 406 includes: a third control module for controlling the range extender to shut down in response to status data indicating that the range extender is in a fault state; and a fourth control module for controlling the range extender to shut down in response to status data indicating that the range extender is in a normal state and the electric power demand data is less than the vehicle's battery power.

[0123] Optionally, the power supply device 400 for the motor in the vehicle may further include: a first determining module, used to determine the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torque of the first motor and the second motor and a target threshold factor, wherein the target threshold factor is related to the ambient temperature of the vehicle, the rate of change of the accelerator pedal opening and the state of the clutch device controller; and a second determining module, used to determine the torque threshold based on the front wheel torque threshold and the rear wheel torque threshold of the vehicle at the same speed.

[0124] Optionally, the first determining module may include: a first determining submodule, used to determine a first threshold factor based on ambient temperature, wherein the ambient temperature is positively correlated with the first threshold factor; a second determining submodule, used to determine a second threshold factor based on the rate of change of accelerator pedal opening, wherein the accelerator pedal opening is negatively correlated with the second threshold factor; a third determining submodule, used to determine a third threshold factor based on the state of the clutch device controller, wherein the state of the clutch device controller includes a normal state, a disengagement fault state, and an engagement fault state; and a fourth determining submodule, used to determine the minimum value among the first threshold factor, the second threshold factor, and the third threshold factor as the target threshold factor.

[0125] Optionally, the control unit 406 may include: a third determining module, used to determine the difference between the power demand data and the battery power as the target power generation; a fifth control module, used to control the range extender to supply power to the vehicle's battery based on the difference between the maximum value of the two power generation data and the target power generation if the target power generation is between the two power generation data of the range extender, wherein the power generation data is point data set based on the characteristics of the range extender; and a sixth control module, used to control the range extender to supply power to the vehicle's first motor and / or second motor based on the target power generation.

[0126] Optionally, the power supply device 400 for the motor in the vehicle may further include: a fourth determining module, used to determine the speed corresponding to the first motor and the speed corresponding to the second motor based on the motor speed, front wheel radius and rear wheel radius corresponding to the first motor and the second motor respectively; and a fifth determining module, used to determine the vehicle speed based on the speed corresponding to the first motor and the speed corresponding to the second motor.

[0127] In this embodiment of the invention, an acquisition unit acquires the vehicle's torque demand value and status data. The torque demand value is used to determine whether the first and second motors in the vehicle are operating, and the status data characterizes the status of the range extender. A determination unit determines the target power output of the range extender based on the torque demand value and status data. A control unit controls the range extender to supply power to the first and / or second motors based on the target power output. The first motor drives the rear wheels of the vehicle, and the second motor drives the front wheels. By considering different situations to determine whether the range extender needs power and which motor to supply power to, the optimal operating state of the range extender is ensured. This achieves the goal of reducing energy consumption and increasing the vehicle's driving range when power demand is low, thereby solving the technical problem of low energy utilization in vehicles and realizing the technical effect of improving energy utilization in vehicles.

[0128] Example 4

[0129] According to an embodiment of the present invention, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein the program executes the power supply method for the motor in the vehicle described in Embodiment 1.

[0130] Example 5

[0131] According to an embodiment of the present invention, a processor is also provided for running a program, wherein the program executes the power supply method for the motor in the vehicle described in Embodiment 1.

[0132] Example 6

[0133] According to an embodiment of the present invention, a vehicle is also provided for performing the vehicle motor power supply method of the embodiments of the present invention.

[0134] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0135] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0137] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0139] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0140] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for supplying power to a motor in a vehicle, characterized in that, include: The torque demand value and status data of the vehicle are obtained, wherein the torque demand value is used to determine whether the first motor and the second motor of the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle. Based on the torque demand value and the status data, the target power generation of the range extender is determined; Based on the target power generation, the range extender is controlled to supply power to the first motor and / or the second motor, wherein the first motor is used to drive the rear wheels of the vehicle, and the second motor is used to drive the front wheels of the vehicle; Based on the target power generation, controlling the range extender to supply power to the first motor and / or the second motor includes: in response to the status data indicating that the range extender is in a normal state, if the torque demand value is less than a torque threshold and the vehicle's electric power demand data is greater than or equal to the vehicle's battery power, controlling the range extender to supply power to the first motor based on the target power generation, wherein the electric power demand data is used to characterize the vehicle's overall electric power demand; or, in response to the status data indicating that the range extender is in a normal state, if the torque demand value is greater than or equal to the torque threshold and the electric power demand data is greater than or equal to the battery power, controlling the range extender to supply power to the first motor and the second motor based on the target power generation; Before controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, the process includes: determining the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torque of the first motor and the second motor and a target threshold factor, wherein the target threshold factor is related to the ambient temperature of the vehicle, the rate of change of accelerator pedal opening, and the state of the clutch device; and determining the torque threshold based on the front wheel torque threshold and the rear wheel torque threshold of the vehicle at the same vehicle speed. The method further includes: determining a first threshold factor based on the ambient temperature, wherein the ambient temperature is positively correlated with the first threshold factor; determining a second threshold factor based on the rate of change of the accelerator pedal opening, wherein the rate of change of the accelerator pedal opening is negatively correlated with the second threshold factor; determining a third threshold factor based on the state of the clutch device, wherein the state of the clutch device includes a normal state, a disengagement fault state, and an engagement fault state; and determining the minimum value among the first threshold factor, the second threshold factor, and the third threshold factor as the target threshold factor.

2. The method according to claim 1, characterized in that, Based on the target power generation, controlling the range extender to supply power to the first motor and / or the second motor includes: In response to the status data indicating that the range extender is in a fault state, the range extender is controlled to stop; or In response to the status data indicating that the range extender is in a normal state and the power demand data is less than the battery power of the vehicle, the range extender is controlled to shut down.

3. The method according to claim 1, characterized in that, Based on the target power generation, controlling the range extender to supply power to the first motor and / or the second motor includes: The difference between the power demand data and the battery power is determined as the target power generation. In response to the target power generation being between two power generation data points of the range extender, the range extender is controlled to supply power to the vehicle's battery based on the difference between the maximum value of the two power generation data points and the target power generation, wherein the power generation data points are point data set based on the characteristics of the range extender; Based on the target power generation, the range extender is controlled to supply power to the first motor and / or the second motor of the vehicle.

4. The method according to claim 1, characterized in that, The method further includes: Based on the motor speed, front wheel radius, and rear wheel radius corresponding to the first motor and the second motor respectively, the speed corresponding to the first motor and the speed corresponding to the second motor are determined; The vehicle speed is determined based on the speed corresponding to the first motor and the speed corresponding to the second motor.

5. A power supply device for a motor in a vehicle, characterized in that, The device includes: An acquisition unit is used to acquire the torque demand value and status data of a vehicle, wherein the torque demand value is used to determine whether the first motor and the second motor of the vehicle are running, and the status data is used to characterize the status of the range extender in the vehicle. A determining unit is used to determine the target power generation of the range extender based on the torque demand value and the status data; A control unit is configured to control the range extender to supply power to the first motor and / or the second motor based on the target power generation, wherein the first motor is used to drive the rear wheels of the vehicle and the second motor is used to drive the front wheels of the vehicle; Based on the target power generation, controlling the range extender to supply power to the first motor and / or the second motor includes: in response to the status data indicating that the range extender is in a normal state, if the torque demand value is less than a torque threshold and the vehicle's electric power demand data is greater than or equal to the vehicle's battery power, controlling the range extender to supply power to the first motor based on the target power generation, wherein the electric power demand data is used to characterize the vehicle's overall electric power demand; or, in response to the status data indicating that the range extender is in a normal state, if the torque demand value is greater than or equal to the torque threshold and the electric power demand data is greater than or equal to the battery power, controlling the range extender to supply power to the first motor and the second motor based on the target power generation; Before controlling the range extender to supply power to the first motor and / or the second motor based on the target power generation, the process includes: determining the rear wheel torque threshold corresponding to the first motor and the front wheel torque threshold corresponding to the second motor based on the motor torque of the first motor and the second motor and a target threshold factor, wherein the target threshold factor is related to the ambient temperature of the vehicle, the rate of change of accelerator pedal opening, and the state of the clutch device; and determining the torque threshold based on the front wheel torque threshold and the rear wheel torque threshold of the vehicle at the same vehicle speed. It also includes: determining a first threshold factor based on the ambient temperature, wherein the ambient temperature is positively correlated with the first threshold factor; determining a second threshold factor based on the rate of change of the accelerator pedal opening, wherein the rate of change of the accelerator pedal opening is negatively correlated with the second threshold factor; determining a third threshold factor based on the state of the clutch device, wherein the state of the clutch device includes a normal state, a disengagement fault state, and an engagement fault state; and determining the minimum value among the first threshold factor, the second threshold factor, and the third threshold factor as the target threshold factor.

6. A processor, characterized in that, The processor is used to run a program, wherein the program is executed by the processor to perform the method according to any one of claims 1 to 4.

7. A vehicle, characterized in that, Used to perform the method according to any one of claims 1 to 4.

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