Forced Charging Control Method and System, Storage Medium, and Vehicle Controller

Abstract

The present invention discloses a forced charging control method and system, a storage medium, and a vehicle controller. Among them, a hybrid vehicle includes an engine, a drive motor, a clutch, a transmission, a motor controller, and a power battery. The engine selectively outputs power to the transmission through the clutch, and the drive motor selectively outputs driving force to the transmission. The motor controller is connected between the power battery and the drive motor to control the drive motor. The forced charging control method includes: obtaining the state information of the engine and the SOC of the power battery, and when it is determined that the hybrid vehicle enters the forced charging condition, obtaining the forced charging torque of the drive motor and the maximum limit torque of the engine, and limiting the vehicle's overall demand torque according to the above torques. Thus, the forced charging control method of this hybrid vehicle can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and particularly to a forced charging control method for a hybrid vehicle, a computer-readable storage medium, a vehicle controller, and a forced charging control system for a hybrid vehicle. Background Art

[0002] For high-voltage hybrid vehicles, energy management is a very important topic, and issues such as how to balance power consumption and fuel consumption, and how to maintain SOC balance need to be considered. However, based on the consideration of vehicle drivability and power performance, the vehicle may not fully respond according to the management requirements. For example, in some cases, the motor needs to output positive torque to assist the engine. If the forced charging condition is not considered, problems such as over-discharge and power reduction of the battery may occur, which will further lead to a shortened battery life, greatly increasing the user's maintenance cost and reducing the user experience. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the present invention proposes a forced charging control method for a hybrid vehicle, which can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0004] The second object of the present invention is to propose a computer-readable storage medium.

[0005] The third object of the present invention is to propose a vehicle controller.

[0006] The fourth object of the present invention is to propose a forced charging control system for a hybrid vehicle.

[0007] To achieve the above object, an embodiment of the first aspect of the present invention proposes a forced charging control method for a hybrid vehicle. The hybrid vehicle includes an engine, a drive motor, a clutch, a gearbox, a motor controller, and a power battery. The engine selectively outputs power to the gearbox through the clutch, the drive motor selectively outputs driving force to the gearbox, and the motor controller is connected between the power battery and the drive motor to control the drive motor. The forced charging control method includes: obtaining the state information of the engine and the SOC (State of Charge) of the power battery; when it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, obtaining the forced charging torque of the drive motor and the maximum limit torque of the engine, and limiting the vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine.

[0008] According to the forced charging control method of an embodiment of the present invention, first, the state information of the engine and the SOC of the power battery are obtained. Then, when it is determined that the hybrid vehicle enters the forced charging working condition according to the state information of the engine and the SOC of the power battery, the forced charging torque of the drive motor and the maximum limit torque of the engine are obtained. Then, the vehicle demand torque of the hybrid vehicle is limited according to the obtained forced charging torque and the maximum limit torque. Thus, the forced charging control method of the hybrid vehicle can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0009] In addition, the forced charging control method of the hybrid vehicle according to the above embodiment of the present invention may further have the following additional technical features:

[0010] According to an embodiment of the present invention, when the hybrid vehicle enters the forced charging working condition, the engine is controlled to output power to the gearbox through the clutch, and at the same time, the engine is controlled to drive the drive motor to generate electricity, so as to charge the power battery through the motor controller.

[0011] According to an embodiment of the present invention, determining that the hybrid vehicle enters the forced charging working condition according to the state information of the engine and the SOC of the power battery includes: when it is determined that the engine is in the running state according to the state information of the engine and the SOC of the power battery is less than a preset value, it is determined that the hybrid vehicle enters the forced charging working condition.

[0012] According to an embodiment of the present invention, when the engine is in the running state and the SOC of the power battery is greater than or equal to the preset value, it is determined that the hybrid vehicle enters the non-forced charging working condition, and the maximum allowable output torque of the drive motor is obtained, and the vehicle demand torque of the hybrid vehicle is limited according to the maximum allowable output torque of the drive motor and the maximum limit torque of the engine.

[0013] According to an embodiment of the present invention, when the hybrid vehicle enters the non-forced charging working condition, the engine is controlled to output power to the gearbox through the clutch, and at the same time, the drive motor is controlled by the motor controller to output driving force to the gearbox for driving assistance.

[0014] According to an embodiment of the present invention, when the hybrid vehicle switches between the forced charging working condition and the non-forced charging working condition, the output torque of the engine is processed for transition.

[0015] According to an embodiment of the present invention, by filtering the output torque of the engine, the output torque of the engine before switching is gradually transitioned to the output torque of the engine after switching.

[0016] According to an embodiment of the present invention, restricting the vehicle's overall demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine includes: when the vehicle's overall demand torque of the hybrid vehicle is less than or equal to the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor, using the vehicle's overall demand torque of the hybrid vehicle as the vehicle's overall output torque.

[0017] According to an embodiment of the present invention, restricting the vehicle's overall demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine includes: when the vehicle's overall demand torque of the hybrid vehicle is greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor, using the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor as the vehicle's overall output torque.

[0018] To achieve the above object, an embodiment of the second aspect of the present invention provides a computer-readable storage medium, on which a forced charging control program for a hybrid vehicle is stored. When the forced charging control program for the hybrid vehicle is executed by a processor, the forced charging control method for the hybrid vehicle as described in the above embodiment is implemented.

[0019] The computer-readable storage medium of the embodiment of the present invention can effectively manage the energy of the vehicle by executing the forced charging control program for the hybrid vehicle stored thereon, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0020] To achieve the above object, an embodiment of the third aspect of the present invention provides a vehicle controller, which includes a memory, a processor, and a forced charging control program for a hybrid vehicle stored on the memory and executable on the processor. When the processor executes the forced charging control program for the hybrid vehicle, the forced charging control method for the hybrid vehicle as described in the above embodiment is implemented.

[0021] The vehicle controller of the embodiment of the present invention includes a memory and a processor. The processor executes the forced charging control program for the hybrid vehicle stored on the memory, which can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0022] To achieve the above object, an embodiment of the fourth aspect of the present invention provides a forced charging control system for a hybrid vehicle. The system includes an engine, a drive motor, a clutch, a transmission, a motor controller, a power battery, and a vehicle controller. The engine selectively outputs power to the transmission through the clutch, and the drive motor selectively outputs driving force to the transmission. The motor controller is connected between the power battery and the drive motor to control the drive motor. The vehicle controller is configured to obtain the state information of the engine and the SOC of the power battery, and when it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, obtain the forced charging torque of the drive motor and the maximum limiting torque of the engine, and limit the overall vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limiting torque of the engine.

[0023] The forced charging control system for a hybrid vehicle according to an embodiment of the present invention includes an engine, a drive motor, a clutch, a transmission, a motor controller, a power battery, and a vehicle controller. Among them, the vehicle controller is configured to obtain the state information of the engine and the SOC of the power battery, and then when it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, obtain the forced charging torque of the drive motor and the maximum limiting torque of the engine, and further limit the overall vehicle demand torque of the vehicle according to the obtained forced charging torque and maximum limiting torque. Thus, the forced charging control system of the hybrid vehicle can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0025] Figure 1 is a schematic flowchart of a forced charging control method for a hybrid vehicle according to an embodiment of the present invention;

[0026] Figure 2 is a structural block diagram of a hybrid vehicle according to an embodiment of the present invention;

[0027] Figure 3 is a schematic flowchart of a forced charging control method for a hybrid vehicle according to the first specific embodiment of the present invention;

[0028] Figure 4 is a schematic flowchart of a forced charging control method for a hybrid vehicle according to the second specific embodiment of the present invention;

[0029] Figure 5 is a schematic flow chart of a forced charging control method for a hybrid vehicle according to the third specific embodiment of the present invention;

[0030] Figure 6 is a structural block diagram of a vehicle controller according to an embodiment of the present invention;

[0031] Figure 7 is a structural block diagram of a forced charging control system for a hybrid vehicle according to an embodiment of the present invention. Specific Embodiments

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] The forced charging control method and system, computer-readable storage medium, and vehicle controller of a hybrid vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0034] Figure 1 is a schematic flow chart of a forced charging control method for a hybrid vehicle according to an embodiment of the present invention,

[0035] First of all, it should be noted that as Figure 2 shown, the hybrid vehicle 10 according to the embodiment of the present invention includes an engine 11, a drive motor 12, a clutch 13, a gearbox 14, a motor controller 15, a power battery 16, and wheels 17. Among them, the engine 11 selectively outputs power to the gearbox 14 through the clutch 13, and the drive motor 12 selectively outputs a driving force to the gearbox 14 so that the gearbox 14 can drive the wheels 17 to rotate. The motor controller 15 is connected between the power battery 16 and the drive motor 12 to control the drive motor 12.

[0036] Based on the structure of the above hybrid vehicle 10, as Figure 1 shown, the forced charging control method of the hybrid vehicle in this embodiment includes the following steps:

[0037] S10, obtaining the state information of the engine 11 and the SOC of the power battery 16.

[0038] Specifically, in this embodiment, the working condition of the power battery 16 in the hybrid vehicle can be determined according to the state information of the engine 11 and the SOC of the power battery 16. Among them, the working condition of the power battery 16 can include an active discharge condition, a passive discharge condition, a maintenance condition, an efficiency charging condition, a forced charging condition, etc.

[0039] S20. When it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine 111 and the SOC of the power battery 16, obtain the forced charging torque of the drive motor 12 and the maximum limit torque of the engine 11, and limit the overall vehicle demand torque of the hybrid vehicle 10 according to the forced charging torque of the drive motor 12 and the maximum limit torque of the engine 11.

[0040] Specifically, when it is determined that the hybrid vehicle 10 enters the forced charging condition, the forced charging torque of the drive motor 12 and the maximum limit torque of the engine 11 under this condition can be obtained. It can be understood that if the vehicle is in the forced charging condition, it means that the electric quantity stored in the power battery 16 of the current vehicle is already too low. If the remaining little electric quantity in the power battery is still used, it may cause over-discharge of the power battery and also make the vehicle in the power reduction mode. Therefore, in the forced charging condition, in this embodiment, the overall vehicle demand torque of the vehicle 10 is also limited according to the forced charging torque of the drive motor 12 and the maximum limit torque of the engine 11, so that the drive motor 12 can charge the power battery 16 through the control of the motor controller 15.

[0041] In some embodiments of the present invention, as Figure 3 shown, limiting the overall vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine includes: S301. If the overall vehicle demand torque of the hybrid vehicle is less than or equal to the difference between the maximum limit torque of the engine minus the forced charging torque of the drive motor. S302. Then use the overall vehicle demand torque of the hybrid vehicle as the overall vehicle output torque.

[0042] Specifically, when the vehicle is in the forced charging condition, the engine needs to provide the forced charging torque for the drive motor while providing the overall vehicle demand torque for the hybrid vehicle. In this embodiment, first judge whether the overall vehicle demand torque of the hybrid vehicle is less than or equal to the difference between the maximum limit torque of the engine minus the forced charging torque of the drive motor. If so, it means that after the current engine provides the forced charging torque for the drive motor, it can still provide the overall vehicle demand torque. Therefore, the overall vehicle demand torque of the hybrid vehicle can be used as the overall vehicle output torque.

[0043] As Figure 4As shown, in some embodiments, if it is determined that the overall vehicle demand torque of a hybrid vehicle is greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor, it indicates that after the current engine provides the forced charging torque for the drive motor, it can no longer provide the corresponding overall vehicle demand torque. Therefore, the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor is used as the output torque of the current overall vehicle.

[0044] In summary, as Figure 5 shown, first, it is determined whether the overall vehicle demand torque of the hybrid vehicle is greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor. If the overall vehicle demand torque of the hybrid vehicle is greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor, then the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor is used as the output torque of the current overall vehicle; if the overall vehicle demand torque of the hybrid vehicle is not greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor, then the overall vehicle demand torque of the hybrid vehicle is used as the output torque of the current overall vehicle.

[0045] In an embodiment of the present invention, referring to Figure 2 shown, determining that the hybrid vehicle enters the forced charging condition according to the state information of the engine 11 and the SOC of the power battery 16 includes: when it is determined according to the state information of the engine 11 that the engine 11 is in an operating state and the SOC of the power battery 16 is less than a preset value, it is determined that the hybrid vehicle 10 enters the forced charging condition.

[0046] Specifically, the operating state of the engine 11 can be used to determine whether the engine 11 is in an operating state. It can be understood that the engine 11 is in an operating state during the forced charging condition of the vehicle 10; in this embodiment, the value of the SOC of the power battery 16 is also used for judgment to determine whether the SOC of the power battery 16 is less than the preset value. When the SOC of the power battery 16 is less than the preset value and the engine is in an operating state, it is determined that the hybrid vehicle 10 has entered the forced charging condition.

[0047] In an embodiment of the present invention, when the hybrid vehicle enters the forced charging condition, the engine is controlled to output power to the transmission through the clutch, and at the same time, the engine is controlled to drive the drive motor to generate electricity to charge the power battery through the motor controller.

[0048] Specifically, as Figure 2As shown, when the vehicle 10 enters the forced charging condition, the clutch 13 can be controlled to close, so that the engine 11 can output power to the transmission 14 through the clutch 13, and the vehicle can be controlled to travel through the transmission 14. At the same time, the engine 11 can also be controlled to drive the drive motor 12 to generate electricity. The drive motor 12 operates under the drive of the engine 11, and the power battery 16 can be charged through the control of the motor controller 15. That is to say, when the vehicle enters the forced condition, the power output by the engine 11 needs to control the vehicle to travel through the transmission 14, and also needs to drive the drive motor 12 to charge the power battery 16.

[0049] In an embodiment of the present invention, refer to Figure 2 , when the engine 11 is in an operating state and the SOC of the power battery 16 is greater than or equal to a preset value, it is determined that the hybrid vehicle 10 enters the non-forced charging condition, and the maximum allowable output torque of the drive motor 12 is obtained, and the vehicle demand torque of the hybrid vehicle 10 is limited according to the maximum allowable output torque of the drive motor 12 and the maximum limit torque of the engine 11.

[0050] Specifically, if the engine 11 is in an operating state, but the SOC of the power battery 16 is greater than or equal to the preset value, then the hybrid vehicle 10 is in the non-forced charging condition. In this condition, the power battery 16 still has power utilization, so the motor controller 15 can be used to control the drive motor 12 to output torque, but this torque is also related to the size of the power battery 16. It can be understood that the maximum allowable output torque of the drive motor 12 can be obtained, and then the vehicle demand torque of the hybrid vehicle 10 can be limited in combination with the maximum limit torque of the engine 11. That is to say, the vehicle demand torque of the vehicle 10 cannot be greater than the sum of the maximum allowable output torque of the drive motor 12 and the maximum allowable output torque of the drive motor 12.

[0051] In this embodiment, when the hybrid vehicle 10 enters the non-forced charging condition, the engine 11 is controlled to output power to the transmission 14 through the clutch 13, and at the same time, the motor controller 15 is used to control the drive motor 12 to output driving force to the transmission 14 for driving assistance.

[0052] Specifically, when the hybrid vehicle 10 enters the non-forced charging condition, it indicates that the current power battery 16 still has a certain amount of electrical energy. Therefore, when the hybrid vehicle 10 issues a torque demand, the engine 11 can be controlled to output power to the transmission 14 through the clutch 13, and at the same time, the drive motor 12 can be controlled by the motor controller 15 to output a driving force to the transmission 14 for driving assistance. It can be understood that in the non-forced charging condition, when the vehicle issues a torque demand, the engine 11 and the drive motor 12 can simultaneously provide torque for the vehicle so that the vehicle can quickly reach the demanded torque.

[0053] It can be understood that in the non-forced charging condition, if the target torque of the driver is less than the output torque of the engine, then a part of the output torque of the engine can also drive the drive motor to generate electricity, and then charge the power battery through the motor controller. Of course, when the battery is fully charged or the battery power is above a certain threshold, the drive motor can also be not controlled to generate electricity.

[0054] In some embodiments of the present invention, when the hybrid vehicle 10 switches between the forced charging condition and the non-forced charging condition, the output torque of the engine of the hybrid vehicle 10 is subjected to a transition process.

[0055] Specifically, when the hybrid vehicle 10 is in the forced charging condition, the engine 11 needs to drive the drive motor 12 to rotate to charge the power battery 16; while when the hybrid vehicle 10 is in the non-forced charging condition, the drive motor 12 can also assist the engine 11 to meet the torque demand of the vehicle. That is to say, when the hybrid vehicle 10 switches between the forced charging condition and the non-forced charging condition, the working modes of the engine 11 and the drive motor 12 change greatly. Therefore, in order to prevent a jump situation and affect the driving experience of the driver, in this embodiment, when the vehicle 10 switches between the forced charging condition and the non-forced charging condition, the output torque of the engine of the vehicle 10 needs to be subjected to a transition process so that the output torque of the engine does not jump, and then the vehicle can smoothly transition to the corresponding condition.

[0056] In this embodiment, the output torque of the engine is filtered to gradually transition the output torque of the engine before the switch to the output torque of the engine after the switch.

[0057] Specifically, in this embodiment, the hybrid vehicle 10 can switch from a forced charging condition to a non-forced charging condition, or from a non-forced charging condition to a forced charging condition. When the vehicle 10 switches from a forced charging condition to a non-forced charging condition, the maximum limit torque of the whole vehicle switches from the difference between the maximum limit torque of the engine 11 and the forced charging torque to the sum of the maximum limit torque of the engine 11 and the maximum allowable output torque of the drive motor 12. When the vehicle 10 switches from a non-forced charging condition to a forced charging condition, the maximum limit torque of the whole vehicle switches from the sum of the maximum limit torque of the engine 11 and the maximum allowable output torque of the drive motor 12 to the difference between the maximum limit torque of the engine 11 and the forced charging torque. Of course, when the vehicle 10 switches from a forced charging condition to a non-forced charging condition, the output torque of the vehicle's electric motor also changes. To prevent the engine output torque from jumping during the vehicle's condition switching process and affecting the driver's driving experience, the output torque of the engine before switching can be filtered so that the engine output torque can smoothly transition to the engine output torque after switching.

[0058] In summary, the forced charging control method for a hybrid vehicle according to an embodiment of the present invention can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0059] Furthermore, the present invention proposes a computer-readable storage medium, on which a forced charging control program for a hybrid vehicle is stored. When the forced charging control program for the hybrid vehicle is executed by a processor, it implements the forced charging control method for the hybrid vehicle in the above embodiment.

[0060] The computer-readable storage medium according to an embodiment of the present invention can implement the forced charging control method for the hybrid vehicle in the above embodiment by the processor executing the forced charging control program for the hybrid vehicle stored thereon, thereby being able to effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0061] Figure 6 It is a structural block diagram of a vehicle controller according to an embodiment of the present invention.

[0062] Furthermore, as Figure 6 shown, the present invention proposes a vehicle controller 100, which includes a memory 101, a processor 102, and a forced charging control program for a hybrid vehicle stored on the memory 101 and executable on the processor 102. When the processor 102 executes the forced charging control program for the hybrid vehicle, it implements the forced charging control method for the hybrid vehicle in the above embodiment.

[0063] The vehicle controller 100 according to an embodiment of the present invention includes a memory 101 and a processor 102. By executing the forced charging control program of the hybrid vehicle stored in the memory 101 through the processor 102, the forced charging control method of the hybrid vehicle in the above embodiment can be implemented, so that the energy of the vehicle can be effectively managed, over-discharge and power reduction of the power battery can be prevented, and the service life of the power battery can be guaranteed.

[0064] Figure 7 It is a structural block diagram of a forced charging control system for a hybrid vehicle according to an embodiment of the present invention.

[0065] Further, as Figure 7 shown, the present invention proposes a forced charging control system 200 for a hybrid vehicle. The control system 200 includes an engine 201, a drive motor 202, a clutch 203, a gearbox 204, a motor controller 205, a power battery 206, a vehicle controller 207, and wheels 208. The engine 201 selectively outputs power to the gearbox 204 through the clutch 203, and the drive motor 202 selectively outputs driving force to the gearbox 204 so that the gearbox 204 can drive the wheels 208 to rotate. The motor controller 205 is connected between the power battery 206 and the drive motor 202 to control the drive motor 202. The vehicle controller 207 is configured to obtain the state information of the engine 201 and the SOC of the power battery 206, and when it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine 201 and the SOC of the power battery 206, obtain the forced charging torque of the drive motor 202 and the maximum limit torque of the engine 201, and limit the vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor 202 and the maximum limit torque of the engine 201.

[0066] First, it should be noted that, as Figure 7 shown, the forced charging control system 200 for a hybrid vehicle according to an embodiment of the present invention includes an engine 201, a drive motor 202, a clutch 203, a gearbox 204, a motor controller 205, and a power battery 206. Among them, the engine 201 selectively outputs power to the gearbox 204 through the clutch 203, the drive motor 202 selectively outputs driving force to the gearbox 204, and the motor controller 205 is connected between the power battery 206 and the drive motor 202 to control the drive motor 202.

[0067] In this embodiment, the vehicle controller 207 can determine the working condition of the power battery 206 in the hybrid vehicle according to the state information of the engine 201 and the SOC of the power battery 206. Among them, the working condition of the power battery 206 may include an active discharge condition, a passive discharge condition, a maintenance condition, an efficiency charging condition, a forced charging condition, etc.

[0068] When it is determined that the hybrid vehicle enters the forced charging condition, the forced charging torque of the drive motor 202 and the maximum limiting torque of the engine 201 can be obtained under this condition. It can be understood that if the vehicle is in the forced charging condition, it means that the electric quantity stored in the power battery 206 of the current vehicle is already too low. If the remaining little electric quantity in the power battery 206 is still used, it may cause the power battery 206 to be over-discharged, and the vehicle will also be in the power reduction mode. Therefore, under the forced charging condition, in this embodiment, the vehicle's total vehicle demand torque is also limited according to the forced charging torque of the drive motor 202 and the maximum limiting torque of the engine 201, so that the drive motor 202 can charge the power battery 206 through the control of the motor controller 205.

[0069] In an embodiment of the present invention, the vehicle controller 207 is further configured to, when the hybrid vehicle enters the forced charging condition, control the engine to output power to the transmission through the clutch, and at the same time control the engine to drive the drive motor to generate electricity to charge the power battery through the motor controller.

[0070] In an embodiment of the present invention, the vehicle controller 207 is further configured to determine that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, including: when it is determined according to the state information of the engine that the engine is in the running state and the SOC of the power battery is less than the preset value, it is determined that the hybrid vehicle enters the forced charging condition.

[0071] In an embodiment of the present invention, the vehicle controller 207 is further configured to, when the engine is in the running state and the SOC of the power battery is greater than or equal to the preset value, determine that the hybrid vehicle enters the non-forced charging condition, obtain the maximum allowable output torque of the drive motor, and limit the vehicle's total vehicle demand torque according to the maximum allowable output torque of the drive motor and the maximum limiting torque of the engine.

[0072] In an embodiment of the present invention, the vehicle controller 207 is further configured to, when the hybrid vehicle enters the non-forced charging condition, control the engine to output power to the transmission through the clutch, and at the same time control the drive motor to output driving force to the transmission through the motor controller for driving assistance.

[0073] In an embodiment of the present invention, the vehicle controller 207 is further configured to perform a transition process on the output torque of the engine when the hybrid vehicle switches between the forced charging condition and the non-forced charging condition.

[0074] In one embodiment of the present invention, the vehicle controller 207 is further configured to gradually transition the engine output torque before switching to the engine output torque after switching by filtering the engine output torque.

[0075] In one embodiment of the present invention, the vehicle controller 207 is further configured to use the vehicle demand torque of the hybrid vehicle as the vehicle output torque if the vehicle demand torque of the hybrid vehicle is less than or equal to the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor.

[0076] In one embodiment of the present invention, the vehicle controller 207 is further configured to use the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor as the vehicle output torque if the vehicle demand torque of the hybrid vehicle is greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor.

[0077] It should be noted that for other specific embodiments of the embodiments of the present invention, reference may be made to the specific embodiments of the forced charging control method for hybrid vehicles in the above embodiments, which will not be elaborated here.

[0078] Thus, the forced charging control system for hybrid vehicles according to the embodiments of the present invention can effectively manage the energy of the vehicle, prevent over-discharge and power reduction of the power battery, and ensure the service life of the power battery.

[0079] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in combination with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in combination with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection part with one or more wirings (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other appropriate processing as necessary, and then stored in a computer memory.

[0080] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0082] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0083] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0084] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0086] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A forced charging control method for a hybrid vehicle, characterized in that, it includes: Obtaining the state information of the engine and the SOC of the power battery; When it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, obtaining the forced charging torque of the drive motor and the maximum limit torque of the engine, and restricting the vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine; Determining that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, includes: When it is determined according to the state information of the engine that the engine is in the running state and the SOC of the power battery is less than the preset value, it is determined that the hybrid vehicle enters the forced charging condition.

2. The forced charging control method for a hybrid vehicle according to claim 1, characterized in that, When the hybrid vehicle enters the forced charging condition, controlling the engine to output power to the transmission through the clutch, and at the same time controlling the engine to drive the drive motor to generate electricity, so as to charge the power battery through the motor controller.

3. The forced charging control method for a hybrid vehicle according to claim 1, characterized in that, When the engine is in the running state and the SOC of the power battery is greater than or equal to the preset value, it is determined that the hybrid vehicle enters the non-forced charging condition, obtaining the maximum allowable output torque of the drive motor, and restricting the vehicle demand torque of the hybrid vehicle according to the maximum allowable output torque of the drive motor and the maximum limit torque of the engine.

4. The forced charging control method for a hybrid vehicle according to claim 3, characterized in that, When the hybrid vehicle enters the non-forced charging condition, controlling the engine to output power to the transmission through the clutch, and at the same time controlling the drive motor to output driving force to the transmission through the motor controller for driving assistance.

5. The forced charging control method for a hybrid vehicle according to claim 3, characterized in that, When the hybrid vehicle switches between the forced charging condition and the non-forced charging condition, the output torque of the engine is processed for transition.

6. The forced charging control method for a hybrid vehicle according to claim 5, characterized in that, By filtering the output torque of the engine, so that the engine output torque before switching gradually transitions to the engine output torque after switching.

7. The forced charging control method for a hybrid vehicle according to claim 1, characterized in that, The restricting the vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine includes: When the vehicle demand torque of the hybrid vehicle is less than or equal to the difference between the maximum limit torque of the engine minus the forced charging torque of the drive motor, using the vehicle demand torque of the hybrid vehicle as the vehicle output torque.

8. The forced charging control method for a hybrid vehicle as claimed in claim 1, wherein, the limitation of the overall vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine includes: when the overall vehicle demand torque of the hybrid vehicle is greater than the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor, taking the difference between the maximum limit torque of the engine and the forced charging torque of the drive motor as the overall vehicle output torque.

9. A computer-readable storage medium, wherein, a forced charging control program for a hybrid vehicle is stored thereon, and when the forced charging control program for the hybrid vehicle is executed by a processor, the forced charging control method for the hybrid vehicle as claimed in any one of claims 1-8 is implemented.

10. An overall vehicle controller, wherein, it includes a memory, a processor, and a forced charging control program for a hybrid vehicle stored on the memory and operable on the processor, and when the processor executes the forced charging control program for the hybrid vehicle, the forced charging control method for the hybrid vehicle as claimed in any one of claims 1-8 is implemented.

11. A forced charging control system for a hybrid vehicle, wherein, it includes an engine, a drive motor, a clutch, a gearbox, a motor controller, a power battery, and an overall vehicle controller. The engine selectively outputs power to the gearbox through the clutch, the drive motor selectively outputs driving force to the gearbox, the motor controller is connected between the power battery and the drive motor to control the drive motor, and the overall vehicle controller is configured to obtain the state information of the engine and the SOC of the power battery, and when it is determined that the hybrid vehicle enters the forced charging condition according to the state information of the engine and the SOC of the power battery, obtain the forced charging torque of the drive motor and the maximum limit torque of the engine, and limit the overall vehicle demand torque of the hybrid vehicle according to the forced charging torque of the drive motor and the maximum limit torque of the engine.

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