A power battery heating device and its heating control method

Abstract

An embodiment of the present application provides a power battery heating device and its heating control method, belonging to the technical field of power batteries. The power battery heating device includes an energy source mechanism, a first driving mechanism, a second driving mechanism, and a vehicle control mechanism; the first driving mechanism includes a first motor controller and a first driving motor, the first motor controller is respectively connected to the energy source mechanism and the first driving motor, and the first driving motor is used to generate heat for heating the power battery; the vehicle control mechanism is respectively connected to the first driving mechanism and the second driving mechanism, the vehicle control mechanism is used to decouple the first driving motor from the wheel end of the vehicle and make the first driving motor in a low-speed idling state, the second driving mechanism is connected to the wheel end of the vehicle, and the second driving mechanism is used to drive the vehicle. The power battery heating device can achieve the technical effects of improving the heating efficiency and heating safety of the power battery.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular, to a power battery heating device and a heating control method thereof. Background Art

[0002] At present, as the energy source of electric vehicles, due to its physical properties, the charging and discharging performance of power batteries will deteriorate sharply in low-temperature environments, seriously affecting the performance of electric vehicles. Therefore, the power batteries of electric vehicles need to be pre-heated in low-temperature environments.

[0003] In the prior art, the commonly adopted solution is to install a positive temperature coefficient (PTC) heater outside the power battery. However, this solution requires a dedicated heating circuit, and additional designs are required for installation and layout. In order to reduce the hardware cost and simplify the design, in recent years, a technical solution using motor stall heating has been gradually adopted. This solution utilizes the vehicle's own drive system without adding additional heating devices or materials, and has been increasingly applied. The main implementation process of this solution is as follows: when the vehicle is stationary and the motor is not rotating, when it is detected that the temperature of the power battery is lower than a certain set threshold, the current is controlled to flow through the stator winding of the motor, and the heat generated by the internal resistance under the stall condition is used to achieve the heating purpose, thereby replacing the PTC heater and reducing the cost. However, there are the following disadvantages in heating the motor under the stall condition: there is an imbalance problem in the current, resulting in uneven temperature rise of the three phases, causing a certain phase winding to reach the allowable temperature while the other phases have not reached the allowable temperature, resulting in limited heating power; using the drive motor to heat under the stall condition requires the vehicle to be stationary, which cannot meet the driving requirements. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a power battery heating device and a heating control method thereof, which can achieve the technical effects of improving the heating efficiency and heating safety of the power battery.

[0005] In a first aspect, the embodiments of the present application provide a power battery heating device, including an energy source mechanism, a first drive mechanism, a second drive mechanism, and a vehicle control mechanism;

[0006] The first drive mechanism includes a first motor controller and a first drive motor. The first motor controller is respectively connected to the energy source mechanism and the first drive motor. The first drive motor is used to generate heat for heating the power battery;

[0007] The vehicle control mechanism is respectively connected to the first driving mechanism and the second driving mechanism. The vehicle control mechanism is used to decouple the first driving motor from the wheel end of the vehicle and keep the first driving motor in a low-speed idling state. The second driving mechanism is connected to the wheel end of the vehicle, and the second driving mechanism is used to drive the vehicle.

[0008] In the above implementation process, the power battery heating device controls the decoupling of the first driving motor from the wheel end of the vehicle through the vehicle control mechanism, so that the first driving motor is in a low-speed idling state, and uses the heat generated by the first driving motor in the idling state for heating. Compared with the traditional motor-blocking heating scheme, it has the following technical effects: First, by controlling the motor to heat in a rotating state, three-phase balance can be achieved, and the problem of three-phase imbalance existing in the blocking heating state is solved; Second, since blocking heating easily causes the temperature rise of one phase to be significantly higher than the other two phases, and the motor enters the over-temperature protection state prematurely, thus limiting the heating power. In the low-speed idling state, the temperature rises of the three phases are basically the same, and the heating capacity of the motor can be maximally exerted, thereby increasing the heating power; Third, it has higher safety. When the motor heats in the blocking state, once the control system malfunctions (such as generating unexpected torque), due to the mechanical coupling between the motor and the wheel end, it will cause the vehicle to move unexpectedly or cause other hazards. Since the power battery heating device can decouple the first driving motor from the wheel end of the vehicle, it avoids the unexpected movement of the vehicle caused by improper control in the blocking state; Therefore, the power battery heating device can achieve the technical effects of improving the heating efficiency and heating safety of the power battery.

[0009] Further, the energy source mechanism is a power battery pack or a charger.

[0010] Further, the vehicle control mechanism includes a shift actuator. The DC input side of the first motor controller is connected to the energy source mechanism, the AC output side of the first motor controller is connected to the stator winding of the first driving motor, the shift actuator is connected to the first driving motor, and the shift actuator is used to control the disconnection and engagement of the first driving motor from the vehicle.

[0011] Further, the vehicle control mechanism further includes a vehicle controller and a shift controller. The vehicle controller is respectively connected to the shift controller, the first motor controller, and the second driving mechanism, and the shift controller is connected to the shift actuator.

[0012] Further, the device further includes a temperature detector, and the temperature detector is used to detect the temperature information of the power battery of the vehicle.

[0013] Further, the second driving mechanism includes a second motor controller and a second driving motor, and the second motor controller is respectively connected to the vehicle control mechanism and the second driving motor.

[0014] In a second aspect, an embodiment of the present application provides a heating control method for a power battery, which is applied to the power battery heating device according to any one of the first aspect. The heating control method includes:

[0015] When the vehicle is cold-started, obtain the temperature information of the power battery and the gear position information of the synchronizer;

[0016] According to the temperature information and the gear position information, detect whether the vehicle meets a preset heating condition. If not, the vehicle starts normally; if so, perform the following heating control processing on the vehicle:

[0017] Generate heating power data according to the target temperature data and the temperature information, obtain target current data through the internal parameters of the first driving motor, and control the stator current component along the rotor magnetic field direction in the first driving motor to generate a heating current.

[0018] In the above implementation process, when the vehicle meets the preset heating condition, by controlling the stator current component along the rotor magnetic field direction of the first driving motor, a heating current is generated, so that the first driving motor is in a low-speed idling state, thereby using the heat generated by the first driving motor in the idling state for heating.

[0019] Further, after the step of controlling the stator current component along the rotor magnetic field direction in the first driving motor according to the target current data to generate a heating current, the method further includes:

[0020] When the temperature of the power battery is greater than or equal to a first preset temperature threshold, control the first driving motor to stop running and heating.

[0021] In the above implementation process, when the temperature of the power battery reaches the first preset temperature threshold, it indicates that the power battery heating is completed at this time, and the vehicle can start normally, so the first driving motor is stopped from running and heating.

[0022] Further, the preset heating condition is that the temperature information is less than a second preset temperature threshold and the gear position information is in neutral.

[0023] Further, the following heating control processing performed on the vehicle further includes:

[0024] Maintain the low-speed idling of the first driving motor through preset calibrated speed data, and control the stator current component along the orthogonal direction of the rotor magnetic field direction in the first driving motor to generate a torque current.

[0025] Other features and advantages disclosed in this application will be described in the subsequent specification. Alternatively, some features and advantages can be inferred from the specification or determined without doubt, or can be learned by implementing the above technologies disclosed in this application.

[0026] To make the above objects, features, and advantages of this application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, provides a detailed description as follows. Description of the Drawings

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for use in the embodiments of this application. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0028] Figure 1 Structural schematic diagram of a power battery heating device provided for an embodiment of this application;

[0029] Figure 2 Schematic diagram of the topological relationship between the gear positions of a shift actuator and a first drive motor and a second drive motor provided for an embodiment of this application;

[0030] Figure 3 Schematic diagram of the heating process of the first drive motor under the vehicle driving state provided for an embodiment of this application;

[0031] Figure 4 Flow schematic diagram of a power battery heating control method provided for an embodiment of this application;

[0032] Figure 5 Flow schematic diagram of another power battery heating control method provided for an embodiment of this application;

[0033] Figure 6 Principle schematic diagram of the temperature and speed control of the first drive motor provided for an embodiment of this application. Detailed Embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0035] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0036] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0037] In addition, the terms "mount", "set", "provided with", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or a point connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] The embodiment of the present application provides a power battery heating device and its heating control method, which can be applied to the battery heating process of an electric vehicle; the power battery heating device decouples the first drive motor and the wheel end of the vehicle through the vehicle control mechanism, so that the first drive motor is in a low-speed idling state, and the heat generated by the first drive motor in the idling state is used for heating. Compared with the traditional motor blocking heating scheme, the following technical effects are achieved: First, controlling the motor to heat in the rotating state can achieve three-phase balance and solve the problem of three-phase imbalance existing in the blocking heating state; Second, since blocking heating easily causes the temperature rise of one phase to be significantly higher than the other two phases, the motor enters the over-temperature protection state prematurely, thus limiting the heating power. In the low-speed idling state, the three-phase temperature rises are basically the same, and the heating capacity of the motor can be maximally exerted, thereby improving the heating power; Third, the safety is higher. When the motor heats in the blocking state, once the control system malfunctions (such as generating unexpected torque), due to the mechanical coupling between the motor and the wheel end, the vehicle will experience unexpected movement or cause other hazards. Since the power battery heating device can decouple the first drive motor from the wheel end of the vehicle, it avoids the unexpected movement of the vehicle caused by improper control in the blocking state; Therefore, the power battery heating device can achieve the technical effects of improving the heating efficiency and heating safety of the power battery.

[0040] Please refer to Figure 1 , Figure 1 FIG. 7 is a schematic structural diagram of a power battery heating device provided by an embodiment of the present application. The power battery heating device includes an energy source mechanism 100, a first drive mechanism 210, a second drive mechanism 220, a vehicle control mechanism 300, and a wheel end 400 of the vehicle.

[0041] Exemplarily, the first drive mechanism 210 includes a first motor controller 211 and a first drive motor 212. The first motor controller 211 is respectively connected to the energy source mechanism 100 and the first drive motor 212. The first drive motor 212 is used to generate heat for heating the power battery.

[0042] Exemplarily, the energy source mechanism 100 is used to provide the energy required for heating the first drive motor 212.

[0043] Exemplarily, the vehicle control mechanism 300 is respectively connected to the first drive mechanism 210 and the second drive mechanism 220. The vehicle control mechanism 300 is used to decouple the first drive motor 212 from the wheel end 400 of the vehicle and make the first drive motor 212 in a low-speed idling state. The second drive mechanism 220 is connected to the wheel end 400 of the vehicle, and the second drive mechanism 220 is used to drive the vehicle.

[0044] Exemplarily, the first drive mechanism 210 utilizes the voltage provided by the energy source mechanism 100 to generate heat for heating the power battery of the vehicle.

[0045] Exemplarily, on the one hand, the vehicle control mechanism 300 is used to decouple the first drive motor 212 and the wheel end 400, so that in the stationary state of the vehicle, the idling of the first drive motor 212 can be controlled; on the other hand, it is used for vehicle state judgment to ensure that the vehicle meets the preheating conditions.

[0046] Exemplarily, the second drive mechanism 220 is always connected to the wheel end 400 and is used to directly drive the vehicle. Under the working conditions where the vehicle acceleration requirement is not high, the power demand of the whole vehicle can be met through the second drive mechanism 220.

[0047] In some implementation scenarios, the power battery heating device controls the decoupling of the first drive motor 212 and the wheel end 400 of the vehicle through the vehicle control mechanism 300, so that the first drive motor 212 is in a low-speed idling state, and the heat generated by the first drive motor 212 in the idling state is used for heating. Compared with the traditional motor blocking heating scheme, it has the following technical effects: First, controlling the motor to heat in the rotating state can achieve three-phase balance and solve the problem of three-phase imbalance existing in the blocking heating state; Second, because blocking heating easily causes the temperature rise of one phase to be significantly higher than the other two phases, the motor enters the over-temperature protection state prematurely, thus limiting the heating power. In the low-speed idling state, the three-phase temperature rises are basically the same, and the heating capacity of the motor can be maximally exerted, thereby increasing the heating power; Third, the safety is higher. When the motor heats in the blocking state, once the control system has an abnormality (such as generating an unexpected torque), due to the mechanical coupling between the motor and the wheel end, it will cause the vehicle to have an unexpected movement or cause other hazards. Since the power battery heating device can decouple the first drive motor 212 from the wheel end 400 of the vehicle, it avoids the unexpected movement of the vehicle caused by improper control in the blocking state; Therefore, the power battery heating device can achieve the technical effects of improving the heating efficiency and heating safety of the power battery.

[0048] In some embodiments, the energy source mechanism 100 is a power battery pack or a charger.

[0049] Please refer to Figure 2 and Figure 3 , Figure 2 which is a schematic diagram of the topological relationship between the gear positions of the shift actuator provided in the embodiment of the present application and the first drive motor and the second drive motor, Figure 3 and which is a schematic diagram of the heating process of the first drive motor under the vehicle driving state provided in the embodiment of the present application.

[0050] Exemplarily, the vehicle control mechanism 300 includes a shift actuator 330. The DC input side of the first motor controller 211 is connected to the energy source mechanism 100, and the AC output side of the first motor controller 211 is connected to the stator winding of the first drive motor 212. The shift actuator 330 is connected to the first drive motor 212, and the shift actuator 330 is used to control the disengagement and engagement of the first drive motor 212 from the vehicle.

[0051] Exemplarily, the DC input side of the first motor controller 211 is connected to the energy source mechanism 100, and the AC output side of the first motor controller 211 is connected to the stator winding of the first drive motor 212, so that the disengagement and engagement of the first drive motor 212 from the vehicle can be controlled through the shift actuator 330; as Figure 2 shown, when the synchronizer in the shift actuator 330 is at position B, the first drive motor 212 is in neutral.

[0052] In some embodiments, the shift actuator 330 may be a coupling controller, a two-speed reducer, etc., which is not limited herein; optionally, the shift actuator 330 may be replaced by other devices with similar functions (capable of decoupling the motor from the wheels).

[0053] Exemplarily, the vehicle control mechanism 300 further includes a vehicle controller 310 and a shift controller 320. The vehicle controller 310 is respectively connected to the shift controller 320, the first motor controller 211, and the second drive mechanism 220, and the shift controller 320 is connected to the shift actuator 330.

[0054] Exemplarily, the power battery device further includes a temperature detector, and the temperature detector is used to detect the temperature information of the power battery of the vehicle.

[0055] Exemplarily, the temperature detection function is realized through the temperature detector, and the temperature of the power battery can be fed back in real time.

[0056] Exemplarily, the second drive mechanism 220 includes a second motor controller 221 and a second drive motor 222, and the second motor controller 221 is respectively connected to the vehicle control mechanism 300 and the second drive motor 221.

[0057] Please refer to Figure 4 , Figure 4 which is a schematic flow chart of a heating control method for a power battery provided by an embodiment of the present application. The heating control method for the power battery is applied to Figures 1 to 3 the power battery heating device shown in the figure. The heating control method for the power battery includes the following steps:

[0058] S100: When the vehicle is cold-started, obtain the temperature information of the power battery and the gear information of the synchronizer;

[0059] S200: Detect whether the vehicle meets the preset heating condition according to the temperature information and gear position information;

[0060] If not, S300: The vehicle starts normally;

[0061] If so, perform the following heating control process on the vehicle:

[0062] S210: Generate heating power data according to the target temperature data and temperature information, obtain target current data through the internal parameters of the first drive motor, and control the stator current component along the rotor magnetic field direction in the first drive motor to generate a heating current.

[0063] Exemplarily, when the vehicle meets the preset heating condition, by controlling the stator current component along the rotor magnetic field direction of the first drive motor, a heating current is generated, so that the first drive motor is in a low-speed idling state, thereby using the heat generated by the first drive motor in the idling state for heating.

[0064] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of another heating control method for a power battery provided by an embodiment of the present application.

[0065] Exemplarily, after the step of controlling the stator current component along the rotor magnetic field direction of the first drive motor according to the target current data to generate a heating current, the heating control method of the power battery further includes:

[0066] S230: When the temperature of the power battery is greater than or equal to the first preset temperature threshold, control the first drive motor to stop operating and heating.

[0067] Exemplarily, when the temperature of the power battery reaches the first preset temperature threshold, it indicates that the power battery heating is completed at this time, and the vehicle can start normally, so the first drive motor is stopped from operating and heating.

[0068] Exemplarily, the preset heating condition is that the temperature information is less than the second preset temperature threshold and the gear position information is in neutral.

[0069] Exemplarily, performing the following heating control process on the vehicle further includes:

[0070] S220: Maintain the idling of the first drive motor through the preset calibrated speed data, and control the stator current component in the orthogonal direction of the rotor magnetic field direction of the first drive motor to generate a torque current.

[0071] Please refer to Figure 6 , Figure 6 which is a schematic diagram of the principle of temperature and speed control of the first drive motor provided by an embodiment of the present application.

[0072] Exemplarily, in combination with Figures 4 to 6 , the heating control method of the power battery provided by the embodiment of the present application is specifically implemented as follows:

[0073] 1) Judgment of the activation condition of the active heating function: When the vehicle is cold-started, if the following two conditions are simultaneously satisfied, the preheating function is activated:

[0074] 1.1) Detect the temperature of the power battery and judge whether the battery temperature is lower than the set threshold;

[0075] 1.2) Detect the synchronizer gear position of the shift actuator and judge whether the synchronizer is in neutral;

[0076] 2) Active heating control: The entire control system includes two links: temperature control and speed control:

[0077] 2.1) Temperature control: According to the target temperature and the actual temperature, calculate the required heating power in real time, and then calculate the target current through the internal parameters of the motor, so as to control the stator current component along the rotor magnetic field direction in the first drive motor to generate a heating current;

[0078] 2.2) Speed control: Obtain the optimal speed under different working conditions (temperature, heating power) through calibration, maintain the low-speed idling of the first drive motor, control the stator current component in the direction orthogonal to the rotor magnetic field direction, generate a torque current, and make the first drive motor output a torque that only needs to overcome the internal resistance of the motor;

[0079] 3) When it is detected that the temperature of the power battery is higher than a certain set threshold, control the first drive motor to stop running and heating.

[0080] Exemplarily, the power battery heating device and its heating control method provided by the embodiment of the present application can not only achieve heating in the vehicle stationary state, but also meet the heating requirements under the driving condition. As Figure 3 shown, use the second drive motor 222 of the second drive mechanism 220 to provide driving power to meet the vehicle driving requirements, and at the same time use the first drive motor 212 to meet the heating requirements under the vehicle running state.

[0081] In all embodiments of the present application, "large" and "small" are relative, "many" and "few" are relative, "up" and "down" are relative. For the expression methods of such relative terms, the embodiments of the present application will not elaborate further.

[0082] It should be understood that the "in this embodiment", "in the embodiments of the present application" or "as an alternative embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in this embodiment", "in the embodiments of the present application" or "as an alternative embodiment" that appear throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all alternative embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0083] In various embodiments of the present application, it should be understood that the magnitudes of the sequence numbers of the above processes do not necessarily mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0084] As described above, the above are only specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A power battery heating device, characterized in that, It includes an energy source mechanism, a first driving mechanism, a second driving mechanism, and a vehicle control mechanism; The first driving mechanism includes a first motor controller and a first driving motor. The first motor controller is respectively connected to the energy source mechanism and the first driving motor. The first driving motor is used to generate heat for heating the power battery. The vehicle control mechanism is respectively connected to the first driving mechanism and the second driving mechanism. The vehicle control mechanism is used to decouple the first driving motor from the wheel end of the vehicle and make the first driving motor in a low-speed idling state. The second driving mechanism is connected to the wheel end of the vehicle, and the second driving mechanism is used to drive the vehicle. The power battery heating device is used for: when the vehicle is cold-started, obtaining the temperature information of the power battery and the gear position information of the synchronizer; detecting whether the vehicle meets the preset heating condition according to the temperature information and the gear position information. If not, the vehicle starts normally; if so, the following heating control process is performed on the vehicle: generating heating power data according to the target temperature data and the temperature information, obtaining target current data through the internal parameters of the first driving motor, and controlling the stator current component along the rotor magnetic field direction in the first driving motor according to the target current data to generate a heating current.

2. The power battery heating device according to claim 1, wherein The energy source mechanism is a power battery pack or a charger.

3. The power battery heating device according to claim 1, characterized in that The vehicle control mechanism includes a shift actuator. The DC input side of the first motor controller is connected to the energy source mechanism, the AC output side of the first motor controller is connected to the stator winding of the first driving motor, and the shift actuator is connected to the first driving motor. The shift actuator is used to control the disconnection and engagement of the first driving motor from the vehicle.

4. The power battery heating device according to claim 3, characterized in that, The vehicle control mechanism further includes a vehicle controller and a shift controller. The vehicle controller is respectively connected to the shift controller, the first motor controller, and the second driving mechanism. The shift controller is connected to the shift actuator.

5. The power battery heating device according to claim 1, characterized in that The device further includes a temperature detector, and the temperature detector is used to detect the temperature information of the power battery of the vehicle.

6. The power battery heating device according to any one of claims 1 to 5, characterized in that, The second driving mechanism includes a second motor controller and a second driving motor. The second motor controller is respectively connected to the vehicle control mechanism and the second driving motor.

7. A heating control method for a power battery, characterized in that, Applied to the power battery heating device according to any one of claims 1 to 6, the heating control method includes: When the vehicle is cold-started, obtaining the temperature information of the power battery and the gear position information of the synchronizer; Detecting whether the vehicle meets the preset heating condition according to the temperature information and the gear position information. If not, the vehicle starts normally; if so, the following heating control process is performed on the vehicle: Generating heating power data according to the target temperature data and the temperature information, obtaining target current data through the internal parameters of the first driving motor, and controlling the stator current component along the rotor magnetic field direction in the first driving motor according to the target current data to generate a heating current.

8. The heating control method of the power battery according to claim 7, characterized in that After the step of controlling the stator current component in the rotor magnetic field direction in the first drive motor according to the target current data to generate a heating current, the method further includes: When the temperature of the power battery is greater than or equal to a first preset temperature threshold, controlling the first drive motor to stop operating and heating.

9. The heating control method for a power battery according to claim 7, characterized in that, The preset heating condition is that the temperature information is less than a second preset temperature threshold and the gear information is in neutral.

10. The heating control method of the power battery according to claim 7, wherein The performing the following heating control process on the vehicle further includes: Maintaining the low-speed idling of the first drive motor through preset calibrated speed data, and controlling the stator current component in the direction orthogonal to the rotor magnetic field direction in the first drive motor to generate a torque current.

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