Range extender control method and range extender control system

Abstract

The application provides a range extender control method and a range extender control system. The range extender control method is applied to the range extender control system. A power take-off device is integrated at the rear end of a driving motor in the range extender control system. After the vehicle controller is powered on and self-checked, the remaining controllers including an internal combustion engine controller, a battery controller and a motor controller are powered on and self-checked. Then, the vehicle controller acquires state information of power source equipment fed back by the remaining controllers, and determines a control mode according to the state information of the power source equipment and power demand, so that the range extender control system works according to the control mode to drive the power take-off device to work. The intelligent control mode is provided for the power take-off device based on the state information of the power source equipment and the power demand, which not only avoids the risk that a single power source failure causes the special vehicle to be paralyzed and even scrapped, but also better matches the vehicle state and actual use, reduces fuel consumption and energy consumption, and realizes energy saving and emission reduction.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to a range extender control method and a range extender control system. Background Technology

[0002] Special-purpose vehicles are an important part of the automotive industry. In recent years, with the development of the national economy, the continuous improvement of people's purchasing power, the rising demand for high-quality and high-value-added products, the accelerated promulgation of laws and regulations such as energy-saving standards and safety standards, and the implementation of energy conservation and emission reduction, higher demands and requirements have been placed on special-purpose vehicles.

[0003] Currently, both traditional and new energy special-purpose vehicles place the power take-off (PTO) as an independent component on the internal combustion engine side or transmission side, or it is driven solely by an electric motor. The power source for the PTO is a single internal combustion engine or electric motor, and the operation of the PTO depends on the operation of the internal combustion engine or electric motor.

[0004] Therefore, existing power take-off (PTO) controls rely on a single power source, such as an internal combustion engine or an electric motor. If this power source fails, the entire vehicle will be rendered unusable, and the cargo it carries may be rendered unusable. Furthermore, current PTO control systems depend on a single power source, leading to a mismatch between the vehicle's inherent condition and actual usage, resulting in high fuel or energy consumption and hindering energy conservation and emission reduction efforts. Summary of the Invention

[0005] This application provides a range extender control method and a range extender control system for special vehicles, aiming to overcome the problem caused by the single power source of the power take-off in special vehicles in the prior art.

[0006] In a first aspect, this application provides a range extender control method, applied to a range extender control system, wherein a power take-off unit is integrated at the rear end of the drive motor of the range extender control system; the method includes:

[0007] After the vehicle controller in the range extender control system is powered on and performs a self-test without error, the other controllers are also powered on and perform self-tests. The other controllers include the internal combustion engine controller, battery controller, and motor controller in the range extender control system.

[0008] After the other controllers have completed their self-tests without errors, the vehicle controller obtains the status information of the power source equipment fed back by the other controllers. The power source equipment includes an internal combustion engine, a high-voltage battery, and the drive motor.

[0009] The whole vehicle controller determines a control mode according to the state information of the power source device and the power demand, so that the range extender control system works according to the control mode to drive the power take-off device.

[0010] In a possible design, the whole vehicle controller acquires the state information of the power source device fed back by the remaining controllers, including:

[0011] The whole vehicle controller acquires error information of the internal combustion engine fed back by the internal combustion engine controller.

[0012] The whole vehicle controller acquires error information and state of charge information of the high-voltage battery fed back by the battery controller.

[0013] The whole vehicle controller acquires error information of the drive motor fed back by the motor controller.

[0014] In a possible design, after the whole vehicle controller acquires the state information of the power source device fed back by the remaining controllers, the whole vehicle controller further includes:

[0015] The range extender control system acquires the power demand in response to a power request of the whole vehicle controller.

[0016] In a possible design, the whole vehicle controller determines a control mode according to the state information of the power source device and the power demand, including:

[0017] According to the error information of the high-voltage battery and the error information of the drive motor, it is determined whether the high-voltage battery and the drive motor are fault-free.

[0018] If yes, the control mode is determined as a first control mode according to the power demand and the state of charge information of the high-voltage battery.

[0019] If no, the control mode is determined as a second control mode.

[0020] In a possible design, the whole vehicle controller determines the control mode as the first control mode according to the power demand and the state of charge information of the high-voltage battery, including:

[0021] The power demand is compared with a rated power of the drive motor; and

[0022] The state of charge of the high-voltage battery is compared with a first preset state of charge threshold, the first preset state of charge threshold being used to represent a minimum enabling state of charge of the high-voltage battery.

[0023] If the power demand is less than the rated power of the drive motor, and the state of charge of the high-voltage battery is greater than the first preset state of charge threshold, the first control mode is determined as a pure electric driving mode.

[0024] if the power demand is greater than or equal to the rated power of the drive motor and the state of charge of the high-voltage battery is greater than the first preset state of charge threshold, determining the first control mode as a hybrid drive mode;

[0025] if the state of charge of the high-voltage battery is less than the first preset state of charge threshold, determining the first control mode as a drive and power generation mode.

[0026] In a possible design, if the high-voltage battery or the drive motor fails, the vehicle control unit determines the second control mode as an internal combustion engine drive mode.

[0027] In a possible design, if the state of charge of the high-voltage battery is greater than or equal to a second preset state of charge threshold, the vehicle control unit determines the control mode as the internal combustion engine drive mode, and the second preset state of charge threshold is used to represent the maximum enabled state of charge of the high-voltage battery.

[0028] In a possible design, the pure electric drive mode comprises:

[0029] The vehicle control unit sends a control instruction to the battery control unit and the motor control unit.

[0030] The battery control unit controls the high-voltage battery to supply power, the power provided by the high-voltage battery is distributed to the motor control unit and the drive motor via a power distribution unit, and the motor control unit controls the drive motor to drive the power takeoff to work.

[0031] In a possible design, the hybrid drive mode comprises:

[0032] The vehicle control unit sends a control instruction to the battery control unit, the motor control unit and the internal combustion engine control unit.

[0033] The battery control unit controls the high-voltage battery to supply power, and the power provided by the high-voltage battery is distributed to the motor control unit and the drive motor via a power distribution unit.

[0034] The motor control unit controls the drive motor to drive the power takeoff to work, the vehicle control unit controls the clutch to be engaged, and the drive motor drives the internal combustion engine to start, and the internal combustion engine and the drive motor jointly drive the power takeoff to work.

[0035] In a possible design, the drive and power generation mode comprises:

[0036] The vehicle control unit sends a control instruction to the battery control unit, the motor control unit and the internal combustion engine control unit.

[0037] The battery controller controls the high-voltage battery power supply, and the electric energy provided by the high-voltage battery is distributed to the motor controller and the drive motor via a power distribution unit;

[0038] The motor controller controls the drive motor to work while the vehicle controller controls the clutch to engage, and the drive motor stops working after starting the internal combustion engine, and the internal combustion engine drives the power take-off to work while driving the drive motor to generate electricity for the high-voltage battery.

[0039] In a possible design, in the hybrid drive mode, the lower boundary of the maximum economic power range of the internal combustion engine is the power source for driving the power take-off to work;

[0040] In the drive and power generation mode, the upper boundary of the maximum economic power range of the internal combustion engine is the power source for driving the power take-off to work.

[0041] In a possible design, the internal combustion engine drive mode includes:

[0042] The vehicle controller sends a control instruction to the internal combustion engine controller;

[0043] The internal combustion engine controller controls the low-voltage battery to supply power to the start generator, and the start generator drives the internal combustion engine to start, and the vehicle controller controls the clutch to engage while the internal combustion engine drives the power take-off to work.

[0044] In a possible design, after starting the internal combustion engine, the start generator also enters a power generation state in response to a power generation instruction of the vehicle controller.

[0045] In a possible design, if the vehicle controller has no power request, the method further includes:

[0046] The vehicle controller sends a shutdown instruction and a power-down instruction to the battery controller, the motor controller, and the internal combustion engine controller;

[0047] The battery controller, the motor controller, and the internal combustion engine controller stop their current work and self-check and power down in response to the shutdown instruction and the power-down instruction.

[0048] In a second aspect, the application provides a range extender control system, including an internal combustion engine, a high-voltage battery, and a drive motor;

[0049] The internal combustion engine is connected to the coaxial rotor of the drive motor, and the drive motor is integrated with a power take-off at the rear end;

[0050] The driving motor is controlled by a motor controller, the motor controller is connected with a battery controller, and the battery controller is used to control the high-voltage battery.

[0051] The battery controller is also connected with a vehicle control unit, the vehicle control unit is connected with an internal combustion engine controller, and the internal combustion engine controller is used to control the internal combustion engine.

[0052] In a possible design, the application further includes a starting motor and a low-voltage battery.

[0053] The starting motor is arranged in a front end train of the internal combustion engine and is connected with the internal combustion engine controller and the low-voltage battery respectively, and has the functions of starting and generating electricity.

[0054] In a possible design, the application further includes a clutch and a power distribution unit.

[0055] The clutch is connected between the internal combustion engine and the driving motor.

[0056] The power distribution unit is connected between the motor controller and the battery controller.

[0057] The application provides a range extender control method and a range extender control system. The range extender control method is applied to the range extender control system, and a power takeoff device is integrated at the rear end of a driving motor in the range extender control system. After a vehicle control unit in the range extender control system is powered on and self-checked, the rest of the controllers are powered on and self-checked. The rest of the controllers include an internal combustion engine controller, a battery controller and a motor controller in the range extender control system. After the rest of the controllers are self-checked, the vehicle control unit obtains state information of power source equipment fed back by the rest of the controllers, wherein the power source equipment includes the internal combustion engine, the high-voltage battery and the driving motor. Then, the vehicle control unit determines a control mode according to the state information of the power source equipment and a power demand, so that the range extender control system works according to the control mode to drive the power takeoff device to work. The intelligent control mode is provided for the power takeoff device based on the state information of the power source equipment and the power demand, so that the power source of the power takeoff device is no longer single. The intelligent control mode can better match the vehicle state and the actual use condition, thereby reducing fuel consumption and energy consumption and achieving energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0059] Figure 1 A structure schematic diagram of a range extender control system provided for an embodiment of the present application is shown in FIG. 1.

[0060] Figure 2 A flowchart of a range extender control method provided for an embodiment of the present application is shown in FIG. 2.

[0061] Figure 3 A flowchart of another range extender control method provided for an embodiment of the present application is shown in FIG. 3.

[0062] Figure 4 A flowchart of still another range extender control method provided for an embodiment of the present application is shown in FIG. 4.

[0063] Figure 5 A structure schematic diagram of a range extender control device provided for an embodiment of the present application is shown in FIG. 5.

[0064] Figure 6 A structure schematic diagram of an electronic device provided for an embodiment of the present application is shown in FIG. 6. DETAILED DESCRIPTION

[0065] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to various alternative embodiments as well. The following description is not limited to the exemplary embodiments, but rather, is applicable to any apparatuses or methods in accordance with the present application, in addition to those explicitly described herein.

[0066] The terms "first", "second", "third", "fourth" and the like in the description and in the claims, where they occur, are used as labels for the necessity of distinguishing between similar objects, and do not necessarily indicate a particular order or a particular spatial or chronological sequence. It should be understood that the use of such terms is only meant to distinguish the objects for ease of description, and thus, it should be understood that the embodiments of the present application described herein can be carried out in other sequences than those described or illustrated herein, without departing from the scope of the present application. Further, the terms "include" and "have" and their conjugates, as used in the specification and in the claims, are intended to indicate a possibility that there are or can be other items in addition to the listed items, and do not exclude the possibility that one or more additional items can be added. It should be understood that the use of such terms is only meant to distinguish the objects for ease of description, and thus, it should be understood that the embodiments of the present application described herein can be carried out in other sequences than those described or illustrated herein, without departing from the scope of the present application. Further, the terms "include" and "have" and their conjugates, as used in the specification and in the claims, are intended to indicate a possibility that there are or can be other items in addition to the listed items, and do not exclude the possibility that one or more additional items can be added.

[0067] The special vehicle can be, for example, a flatbed truck, an oil tank truck, a water truck, a garbage truck, a sewage suction truck and the like. The special vehicle is usually provided with a power take-off (PTO), that is, one or more sets of variable speed gears, also known as a power output device, for the special vehicle to carry out work. At present, whether it is a traditional special vehicle or a new energy special vehicle, the power take-off is arranged as an independent component on the side of the internal combustion engine or the side of the transmission, or is separately driven by an electric motor to work. The power source for power take-off is a single internal combustion engine or electric motor, and the work of the power take-off needs to be based on the work of the internal combustion engine or electric motor. Obviously, the power source for power take-off control is a single power drive, such as an internal combustion engine or an electric motor. Once the power source fails, the entire special vehicle will be paralyzed, resulting in a risk of scrapping the carried goods. In addition, the control of the power take-off in the prior art can only rely on a single power source, and there is a problem that the vehicle state of the special vehicle does not match the actual use, which leads to high oil consumption or energy consumption and cannot achieve energy saving and emission reduction.

[0068] In view of the above problems existing in the prior art, the application provides a range extender control method and a range extender control system. The application concept is to integrate the power take-off on the drive motor in the range extender control system, determine the corresponding control mode for the range extender control system according to the state information of the power source device in the range extender control system and the power demand in the actual use scene of the power take-off, and make the range extender control system work according to the control mode to drive the power take-off to work. Thus, different power sources can be provided for the power take-off based on the vehicle state and actual use of the special vehicle, the problem caused by the single power source of the power take-off can be overcome, the risk of scrapping the carried goods due to the failure of the single power source can be avoided, and energy saving and emission reduction can be achieved by effectively reducing oil consumption and energy consumption.

[0069] Figure 1 A structure diagram of a range extender control system provided by an embodiment of the application is shown in FIG. 1. Figure 1 As shown in FIG. 1, the range extender control system provided by the embodiment of the application comprises an internal combustion engine 11, a high-voltage battery 12 and a drive motor 13.

[0070] The internal combustion engine 11 is connected with the coaxial rotor of the drive motor 13, and the power take-off 14 is integrated at the rear end of the drive motor 13.

[0071] The drive motor 13 is controlled by a motor controller 15, for example, the drive motor 13 and the motor controller 15 are in communication connection, the drive motor 13 can work in response to the instruction issued by the motor controller 15, and the motor controller 15 can be a microcontroller unit (MCU).

[0072] The motor controller 15 and the battery controller 16 can be communicatively connected, and can exchange instructions therebetween. The battery controller 16 is configured to control the high-voltage battery 12, so that the high-voltage battery 12 can work in an optimal state. The battery controller 16 can be, for example, a battery management system (BMS).

[0073] In addition, the battery controller 16 can be communicatively connected with a vehicle controller 17. The vehicle controller 17 can be, for example, a vehicle control unit (VCU), which is a general controller of the power system of the vehicle. Accordingly, the motor controller 15 and the vehicle controller 17 can be communicatively connected. The vehicle controller 17 can also be communicatively connected with an internal combustion engine controller 18. The internal combustion engine controller 18 is configured to control the internal combustion engine 11. The internal combustion engine controller 18 can be, for example, an electronic control unit (ECU), which is configured to control the operation of the internal combustion engine 11.

[0074] In one possible design, as shown in Figure 1 The range extender control system provided by the embodiments of the present application can further include a starter generator 19 and a low-voltage battery 20.

[0075] The starter generator 19 can be arranged in a front end train of the internal combustion engine 11. The starter generator 19 can be connected with the internal combustion engine controller 18 and the low-voltage battery 20 respectively. The starter generator 19 has the functions of starting and generating electricity. The low-voltage battery 20 is configured to supply power to the starter generator 19.

[0076] Optionally, as shown in Figure 1 The range extender control system provided by the embodiments of the present application can further include a clutch 21 and a power distribution unit 22.

[0077] The clutch 21 is coaxially connected between the internal combustion engine 11 and the drive motor 13. The vehicle controller 17 can transmit corresponding torque by controlling the engagement of the clutch 21.

[0078] The power distribution unit 22 can be connected between the motor controller 15 and the battery controller 16, and is configured to distribute the power provided by the high-voltage battery 12.

[0079] It should be noted that, Figure 1 The dashed line with an arrow is used to represent the communicatively connected, the solid line with an arrow is used to represent any connection that can realize the control function, for example, electrical connection, physical connection, etc. The solid line without an arrow represents coaxial or other arbitrary connection that can realize the control function. The connection mode between the devices in the range extender control system in the embodiments of the present application includes but is not limited to Figure 1The connection mode shown.

[0080] The range extender control system provided by the embodiments of the present application has a power take-off function. When the range extender control method provided by the embodiments of the present application is performed, different control modes can be provided for driving the power take-off to work based on the vehicle state represented by the state information of the internal combustion engine, the high-voltage battery and the driving motor and the power demand of the actual work of the power take-off, thereby overcoming the problem caused by the single power source of the power take-off. Not only can the risk of scrapping the special vehicle carrying goods due to the failure of the single power source be avoided, but also the fuel consumption and energy consumption can be effectively reduced to achieve energy saving and emission reduction.

[0081] Figure 2 A flowchart of a range extender control method provided by the embodiments of the present application. The range extender control method provided by the embodiments of the present application can be applied to Figure 1 The range extender control system shown, the driving motor in the range extender control system is integrated with a power take-off at the rear end. As Figure 2 The range extender control method provided by the embodiments of the present application includes:

[0082] S101: After the vehicle controller in the range extender control system is powered on and self-checked without error, the remaining controllers are powered on and self-checked.

[0083] The remaining controllers include the internal combustion engine controller, the battery controller and the motor controller in the range extender control system.

[0084] The vehicle controller in the range extender control system is powered on. After the vehicle controller is powered on and self-checked, the internal combustion engine controller, the battery controller and the motor controller in the range extender control system are powered on, that is, the remaining controllers are powered on. The remaining controllers are powered on and self-checked.

[0085] If the internal combustion engine controller, the battery controller and the motor controller find faults in the self-checking process, the warning or shutdown can be selected according to the pre-set fault level. If no fault is found, that is, the remaining controllers are self-checked without error, the remaining controllers will feed back the state information of the power source device to the vehicle controller.

[0086] S102: After the remaining controllers are self-checked without error, the vehicle controller obtains the state information of the power source device fed back by the remaining controllers.

[0087] The power source device includes the internal combustion engine, the high-voltage battery and the driving motor.

[0088] After the self-checking of the internal combustion engine controller, the battery controller and the motor controller, if no fault is found, i.e. the self-checking of the remaining controllers is correct, the internal combustion engine controller, the battery controller and the motor controller will correspondingly feed back the state information of the internal combustion engine, the high-voltage battery and the driving motor to the vehicle controller. For example, the internal combustion engine controller feeds back the state information of the internal combustion engine, the battery controller feeds back the state information of the high-voltage battery, and the motor controller feeds back the state information of the driving motor. With respect to the vehicle controller, the state information of the power source equipment fed back by the remaining controllers is obtained.

[0089] In a possible design, the possible implementation of the step S102 includes the following steps.

[0090] The vehicle controller obtains the error information of the internal combustion engine fed back by the internal combustion engine controller, so that whether the internal combustion engine has a fault can be known according to the error information of the internal combustion engine.

[0091] The vehicle controller obtains the error information and the state of charge information of the high-voltage battery fed back by the battery controller, so that whether the high-voltage battery has a fault can be known according to the error information and the state of charge information of the high-voltage battery. The state of charge information of the high-voltage battery can reflect the remaining capacity of the high-voltage battery, i.e. the SOC (State of charge) of the high-voltage battery.

[0092] The vehicle controller obtains the error information of the driving motor fed back by the motor controller, so that whether the driving motor has a fault can be known according to the error information of the driving motor.

[0093] It can be seen that the state information of the power source equipment can reflect the state of the special vehicle itself, i.e. whether the power source equipment of the special vehicle has a fault.

[0094] S103: The range extender control system obtains the power demand in response to the power request of the vehicle controller.

[0095] After the vehicle controller obtains the state information of the power source equipment, the range extender control system is ready to enter the working state and waits for the power request issued by the vehicle controller according to the actual working demand of the special vehicle on the power takeoff device. The power request carries the power demand, which is the demand for the range extender control system to implement the current actual work of the power takeoff device. The working scene of the power takeoff device is different, and the required power is different, and correspondingly the power demand is different. The power demand can reflect the actual working scene of the power takeoff device.

[0096] Correspondingly, after the vehicle controller obtains the state information of the power source equipment, the range extender control system waits for the power request issued by the vehicle controller. If the vehicle controller issues the power request, the range extender control system obtains the corresponding power demand in response to the power request of the vehicle controller.

[0097] In addition, if the vehicle controller does not send a power request, i.e. no power request, the vehicle controller sends a shutdown instruction and a power-down instruction to the battery controller, the motor controller and the internal combustion engine controller, and the battery controller, the motor controller and the internal combustion engine controller stop their current work in response to the shutdown instruction and the power-down instruction and perform self-checking and power-down.

[0098] It can be understood that the power request of the vehicle controller can occur during the preparation of the range extender control system to enter the working state, or during the working of the range extender control system, depending on the actual working condition of the power take-off.

[0099] S104: The vehicle controller determines the control mode according to the state information of the power source device and the power demand, so that the range extender control system works according to the control mode to drive the power take-off to work.

[0100] The vehicle controller determines the corresponding control mode of the range extender control system according to the state information of the power source device and the power demand, so that the range extender control system works according to the determined control mode to drive the power take-off to work. Thus, the intelligent control mode is provided for the power take-off based on the vehicle state and the actual use of the power take-off, and the control modes can be switched according to the vehicle state and the actual use of the power take-off. Different control modes have different power sources, so that the power source of the power take-off is no longer single.

[0101] The range extender control method provided by the embodiment of the application is applied to a range extender control system, and a power take-off is integrated at the rear end of a drive motor in the range extender control system. After the vehicle controller is powered on and self-checked, the remaining controllers are powered on and self-checked, and the remaining controllers include an internal combustion engine controller, a battery controller and a motor controller in the range extender control system. After the remaining controllers are self-checked, the vehicle controller obtains the state information of the power source device fed back by the remaining controllers, wherein the power source device includes an internal combustion engine, a high-voltage battery and a drive motor, and then determines the control mode according to the state information of the power source device and the power demand, so that the range extender control system works according to the control mode to drive the power take-off to work. The intelligent control mode is provided for the power take-off based on the state information of the power source device and the power demand, so that the power source of the power take-off is no longer single. The risk that the special vehicle is paralyzed and even scrapped due to the failure of the single power source can be avoided, the intelligent control mode can better match the vehicle state and the actual use, thereby reducing the fuel consumption and energy consumption, and achieving energy saving and emission reduction.

[0102] Figure 3 The flowchart of another range extender control method provided by the embodiment of the application is shown. The range extender control method provided by the embodiment of the application can be applied to Figure 1The range extender control system shown, the driving motor rear end of the range extender control system is integrated with a power take-off. As shown Figure 3 The range extender control method provided by the embodiments of the application includes the following steps.

[0103] S201: After the vehicle controller in the range extender control system is powered on and self-checked, the remaining controllers are powered on and self-checked.

[0104] The remaining controllers include an internal combustion engine controller, a battery controller and a motor controller in the range extender control system.

[0105] S202: After the remaining controllers are self-checked, the vehicle controller obtains state information of power source equipment fed back by the remaining controllers.

[0106] The power source equipment includes an internal combustion engine, a high-voltage battery and a driving motor.

[0107] S203: The range extender control system obtains power demand in response to a power request of the vehicle controller.

[0108] The possible implementation manners, principles and technical effects of steps S201 to S203 are similar to those of steps S101 to S103, and specific contents can be referred to the foregoing embodiment description.

[0109] S204: The vehicle controller determines whether the high-voltage battery and the driving motor are fault-free according to error information of the high-voltage battery and error information of the driving motor.

[0110] The vehicle controller determines whether the high-voltage battery and the driving motor are fault-free according to error information of the high-voltage battery and error information of the driving motor, that is, determines whether the high-voltage battery and the driving motor are fault-free. The pure electric power source equipment includes the high-voltage battery and the driving motor.

[0111] If the high-voltage battery and the driving motor are fault-free, that is, the determination result is yes, step S205 is performed. If at least one of the high-voltage battery and the driving motor is faulted, that is, the determination result is no, step S206 is performed.

[0112] S205: The vehicle controller determines the control mode as the first control mode according to the power demand and charge state information of the high-voltage battery.

[0113] In the case that the pure electric power source equipment is fault-free, the control mode determined by the vehicle controller for driving the power take-off of the range extender control system to work is the first control mode.

[0114] The first control mode can be a pure electric driving mode, a hybrid driving mode, or a driving and power generation mode, and the specific control mode is determined according to the power demand and the charge state information of the high-voltage battery.

[0115] In the pure electric driving mode, the power source is the high-voltage battery, and in the hybrid driving mode, the power source is the high-voltage battery, the driving motor, and the internal combustion engine.

[0116] In the driving and power generation mode, the power source is the driving motor and the internal combustion engine, and at the same time, the power source drives the driving motor to generate power for the high-voltage battery.

[0117] S206: The vehicle controller determines that the control mode is the second control mode.

[0118] In the case of a failure of the pure electric power source, the vehicle controller determines that the control mode for the range extender control system to drive the power take-off is the second control mode.

[0119] When at least one of the high-voltage battery and the driving motor fails, the determined second control mode is the internal combustion engine driving mode. The power source of the internal combustion engine driving mode is only the internal combustion engine.

[0120] For example, when at least one of the high-voltage battery and the driving motor fails, the specific control process of the determined internal combustion engine driving mode is as follows:

[0121] The vehicle controller sends a control instruction to the internal combustion engine controller, and the internal combustion engine controller controls the low-voltage battery to supply power to the starting generator in response to the control instruction, so that the starting generator rotates to drive the internal combustion engine to start. At the same time, the vehicle controller controls the clutch to engage, and the start of the internal combustion engine drives the power take-off to work, completing the driving of the power take-off.

[0122] In addition, after the starting generator drives the internal combustion engine to start, the starting generator can also enter a power generation state at any time in response to the power generation instruction of the vehicle controller, realizing the functions of starting and power generation of the starting generator.

[0123] The range extender control method provided by the embodiment of the application is applied to a range extender control system. When a vehicle controller determines a control mode of a driving power take-off according to state information of a power source device and power demand, it is determined whether the pure electric power source device is fault-free. If yes, the control mode is determined as a first control mode according to the power demand and state information of a high-voltage battery. If not, the control mode is determined as a second control mode. The intelligent control mode of the power take-off is provided based on whether the pure electric power source device is fault-free and the power demand, and the best power source is matched for the power take-off according to the state of the vehicle itself and actual working needs, which can avoid the risk that the special vehicle is paralyzed and even scrapped due to the fault of a single power source, and can effectively reduce fuel consumption and energy consumption, and achieve energy saving and emission reduction.

[0124] In a possible design, the step S205 can be implemented as shown in Figure 4 . Figure 4 Another range extender control method provided by the embodiment of the application is shown in a flowchart. As shown in Figure 4 , the embodiment of the application includes the following steps.

[0125] S301: comparing the power demand with the rated power of the driving motor.

[0126] S302: comparing the state of charge of the high-voltage battery with a first preset charge threshold.

[0127] The first preset charge threshold is used to represent the minimum enabled state of charge of the high-voltage battery.

[0128] In the case that the high-voltage battery and the driving motor are fault-free, the vehicle controller compares the power demand with the rated power of the driving motor, for example, assuming that the rated power of the driving motor is 50 KW, the power demand is compared with 50 KW. On the other hand, the state of charge of the high-voltage battery is compared with the first preset charge threshold, wherein the first preset charge threshold is used to represent the minimum enabled state of charge of the high-voltage battery. For example, assuming that the first preset charge threshold is 10%, the state of charge of the high-voltage battery is compared with 10%. The rated power of the driving motor is determined by the specification of the driving motor in the actual working condition, and the first preset charge threshold is determined by the specification of the high-voltage battery, which is not limited in the embodiment of the application.

[0129] After the above comparison, the specific content of the first control mode is determined according to the comparison result.

[0130] S303: if the power demand is less than the rated power of the driving motor, and the state of charge of the high-voltage battery is greater than the first preset charge threshold, the first control mode is determined as a pure electric driving mode.

[0131] Through the comparison, if the power demand is less than the rated power of the driving motor, and the state of charge of the high-voltage battery is greater than the first preset charge threshold, the vehicle controller determines the first control mode as the pure electric driving mode.

[0132] Optionally, the specific control process of the pure electric driving mode determined by the vehicle controller is as follows:

[0133] The vehicle controller sends a control instruction to the battery controller and the motor controller, the battery controller controls the high-voltage battery to supply power in response to the control instruction, and the electric energy provided by the high-voltage battery reaches the motor controller and the driving motor after being distributed by the power distribution unit, so that the motor controller starts to work to control the driving motor to drive the power takeoff.

[0134] S304: If the power demand is greater than or equal to the rated power of the driving motor, and the state of charge of the high-voltage battery is greater than the first preset charge threshold, the first control mode is determined as the hybrid driving mode.

[0135] Through the comparison, if the power demand is greater than or equal to the rated power of the driving motor, and the state of charge of the high-voltage battery is greater than the first preset charge threshold, the vehicle controller determines the first control mode as the hybrid driving mode, that is, there is both electric power driving and fuel driving provided by the internal combustion engine.

[0136] Optionally, the specific control process of the hybrid driving mode determined by the vehicle controller is as follows:

[0137] The vehicle controller sends a control instruction to the battery controller, the motor controller and the internal combustion engine controller,

[0138] The battery controller controls the high-voltage battery to supply power in response to the control instruction, and the electric energy provided by the high-voltage battery reaches the motor controller and the driving motor after being distributed by the power distribution unit, so that the motor controller can control the driving motor to drive the power takeoff, and the vehicle controller controls the clutch to be engaged. And the driving motor drives the internal combustion engine to start, so that the internal combustion engine participates in work to drive the power takeoff together with the driving motor.

[0139] Optionally, in the hybrid driving mode, the lower boundary of the maximum economic power range of the internal combustion engine is preferentially used as the power source to drive the power takeoff, and the insufficient part of the power source provided by the internal combustion engine is supplemented by the driving motor.

[0140] S305: If the state of charge of the high-voltage battery is less than the first preset charge threshold, the first control mode is determined as the driving and power generation mode.

[0141] By comparison, if the charge state of the high-voltage battery is less than the first preset charge threshold, the first control mode determined by the vehicle controller is the driving and power generation mode, and the driving and power generation mode is used to drive the power take-off device and generate power for the high-voltage battery at the same time when the internal combustion engine drives the power take-off device.

[0142] Optionally, the specific control process of the driving and power generation mode determined by the vehicle controller is as follows:

[0143] The vehicle controller sends a control instruction to the battery controller, the motor controller and the internal combustion engine controller, the battery controller controls the high-voltage battery to supply power in response to the control instruction, and the power provided by the high-voltage battery reaches the motor controller and the driving motor through the power distribution unit, so that the motor controller can control the driving motor to work at the same time, the vehicle controller controls the clutch to engage, and the driving motor stops working after driving the internal combustion engine to start, and the internal combustion engine drives the power take-off device to work at the same time, and the driving motor generates power for the high-voltage battery, and the internal combustion engine drives the power take-off device to work at the same time, and the driving motor generates power for the high-voltage battery.

[0144] Optionally, in the driving and power generation mode, the upper boundary of the maximum economic power range of the internal combustion engine is used as the power source to drive the power take-off device to work, and the excess part of the power source of the internal combustion engine is used to generate power for the high-voltage battery, so that the high-voltage battery is charged.

[0145] Optionally, in some embodiments, the charge state of the high-voltage battery can also be compared with a second preset charge threshold, and the second preset charge threshold is used to represent the maximum enabled charge state of the high-voltage battery, for example, it can be 80% (the specific value is not limited in the embodiments of the present application). If the charge state of the high-voltage battery is greater than or equal to the second preset charge threshold, the control mode determined by the range extender control system for driving the power take-off device is the internal combustion engine driving mode. The specific control process of the internal combustion engine driving mode is as follows: Figure 3 The embodiments described in the embodiments are not described here.

[0146] The range extender control method provided by the embodiments of the present application is applied to the range extender control system. In the case that the pure electric power source equipment is not faulty, the vehicle controller compares the power demand with the rated power of the driving motor on one hand, and compares the charge state of the high-voltage battery with the first preset charge threshold on the other hand, and then determines the first control mode to be one of the pure electric driving mode, the hybrid driving mode and the driving and power generation mode according to the comparison result, so that the range extender control system drives the power take-off device to work according to the corresponding control mode determined. According to the vehicle state information and the actual working condition of the power take-off device, the intelligent control mode is provided for the power take-off device, and the switching between different control modes can match the best power source for the power take-off device, which can not only avoid the risk that the special vehicle is paralyzed and even scrapped due to the fault of a single power source, but also effectively reduce the fuel consumption and energy consumption, and achieve energy saving and emission reduction.

[0147] Figure 5 A structure schematic diagram of an extended-range device control device provided by an embodiment of the present application. As shown in the figure, the extended-range device control device 400 provided by the embodiment of the present application comprises: Figure 5

[0148] The power-on and self-checking module 401 is configured to power on the vehicle controller in the extended-range device control system and perform self-checking, and after the self-checking is successful, the rest of the controllers are powered on and perform self-checking, the rest of the controllers including an internal combustion engine controller, a battery controller and a motor controller in the extended-range device control system.

[0149] The acquisition module 402 is configured to acquire, by the vehicle controller, state information of power source devices including the internal combustion engine, the high-voltage battery and the drive motor, after the self-checking of the rest of the controllers is successful.

[0150] The processing and control module 403 is configured to determine a control mode according to the state information of the power source devices and the power demand, so that the extended-range device control system works according to the control mode to drive the power take-off device to work.

[0151] In a possible design, the acquisition module 402 is specifically configured to:

[0152] acquire error information of the internal combustion engine fed back by the internal combustion engine controller;

[0153] acquire error information and state of charge information of the high-voltage battery fed back by the battery controller;

[0154] acquire error information of the drive motor fed back by the motor controller.

[0155] In a possible design, the acquisition module 402 is further configured to:

[0156] The extended-range device control system acquires the power demand in response to a power request of the vehicle controller.

[0157] In a possible design, the processing and control module 403 is specifically configured to:

[0158] determine whether the high-voltage battery and the drive motor are fault-free according to the error information of the high-voltage battery and the error information of the drive motor;

[0159] if yes, determine the control mode as a first control mode according to the power demand and the state of charge information of the high-voltage battery;

[0160] if no, determine the control mode as a second control mode.

[0161] In a possible design, the processing and control module 403 is further configured to:

[0162] ​comparing the power demand with a rated power of the drive motor; and

[0163] comparing the state of charge of the high-voltage battery with a first preset charge threshold, the first preset charge threshold representing a minimum enabled state of charge of the high-voltage battery;

[0164] if the power demand is less than the rated power of the drive motor and the state of charge of the high-voltage battery is greater than the first preset charge threshold, determining the first control mode as the pure electric drive mode;

[0165] if the power demand is greater than or equal to the rated power of the drive motor and the state of charge of the high-voltage battery is greater than the first preset charge threshold, determining the first control mode as the hybrid drive mode;

[0166] if the state of charge of the high-voltage battery is less than the first preset charge threshold, determining the first control mode as the drive and power generation mode.

[0167] In a possible design, the processing and control module 403 is further configured to:

[0168] if the high-voltage battery or the drive motor fails, determining the second control mode as the internal combustion engine drive mode.

[0169] In a possible design, the processing and control module 403 is further configured to:

[0170] if the state of charge of the high-voltage battery is greater than or equal to a second preset charge threshold, determining the control mode as the internal combustion engine drive mode, the second preset charge threshold representing a maximum enabled state of charge of the high-voltage battery.

[0171] In a possible design, the pure electric drive mode comprises:

[0172] the vehicle controller sends a control instruction to the battery controller and the motor controller;

[0173] the battery controller controls the high-voltage battery to supply power, the power provided by the high-voltage battery is distributed to the motor controller and the drive motor via the power distribution unit, and the motor controller controls the drive motor to drive the power take-off to work.

[0174] In a possible design, the hybrid drive mode comprises:

[0175] the vehicle controller sends a control instruction to the battery controller, the motor controller, and the internal combustion engine controller;

[0176] the battery controller controls the high-voltage battery to supply power, the power provided by the high-voltage battery is distributed to the motor controller and the drive motor via the power distribution unit;

[0177] The motor controller controls the driving motor to drive the power take-off, and the vehicle controller controls the clutch to engage, and the driving motor drives the internal combustion engine to start, and the internal combustion engine and the driving motor drive the power take-off together.

[0178] In a possible design, the driving and power generation mode includes:

[0179] The vehicle controller sends control instructions to the battery controller, the motor controller and the internal combustion engine controller.

[0180] The battery controller controls the high-voltage battery to supply power, and the power supplied by the high-voltage battery is distributed to the motor controller and the driving motor through the power distribution unit.

[0181] The motor controller controls the driving motor to drive the power take-off, and the vehicle controller controls the clutch to engage, and the driving motor stops working after driving the internal combustion engine to start, and the internal combustion engine drives the driving motor to generate power for the high-voltage battery while driving the power take-off.

[0182] In a possible design, in the hybrid driving mode, the lower boundary of the maximum economic power range of the internal combustion engine is used as the power source for driving the power take-off.

[0183] In the driving and power generation mode, the upper boundary of the maximum economic power range of the internal combustion engine is used as the power source for driving the power take-off.

[0184] In a possible design, the internal combustion engine driving mode includes:

[0185] The vehicle controller sends control instructions to the internal combustion engine controller.

[0186] The internal combustion engine controller controls the low-voltage battery to supply power to the starter generator, the starter generator drives the internal combustion engine to start, and the vehicle controller controls the clutch to engage while the internal combustion engine drives the power take-off.

[0187] In a possible design, after starting the internal combustion engine, the starter generator also enters a power generation state in response to a power generation instruction from the vehicle controller.

[0188] In a possible design, when the vehicle controller has no power request, the processing and control module 403 is further configured to:

[0189] The vehicle controller sends a shutdown instruction and a power-down instruction to the battery controller, the motor controller and the internal combustion engine controller.

[0190] The battery controller, the motor controller and the internal combustion engine controller stop their current work and self-checking and power down in response to the shutdown instruction and the power-down instruction.

[0191] The range extender control device provided by the embodiments of the present application can execute the corresponding steps of the range extender control method in the method embodiments, and the implementation principles and technical effects are similar, which will not be repeated here.

[0192] Figure 6 A structural schematic diagram of an electronic device is provided in the embodiments of the present application. As shown in the figure, Figure 6 The electronic device 500 can include a processor 501 and a memory 502 connected with the processor 501.

[0193] The memory 502 is configured to store a program. Specifically, the program can include program code, and the program code includes computer execution instructions.

[0194] The memory 502 can include a high-speed RAM memory, and can also include a non-volatile memory (MoM-volatile memory), such as at least one disk memory.

[0195] The processor 501 is configured to execute the computer execution instructions stored in the memory 502 to implement the range extender control method.

[0196] The processor 501 can be a central processing unit (CeMtral ProcessiMg UMit, CPU for short) or an application specific integrated circuit (ApplicatioM Specific IMtegrated Circuit, ASIC for short), or one or more integrated circuits configured to implement the embodiments of the present application.

[0197] Optionally, the memory 502 can be independent or integrated with the processor 501. When the memory 502 is a device independent of the processor 501, the electronic device 500 can further include:

[0198] The bus 503 is configured to connect the processor 501 and the memory 502. The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0199] Optionally, if the memory 502 and the processor 501 are integrated on a chip, the memory 502 and the processor 501 can complete the communication through an internal interface.

[0200] The application further provides a computer readable storage medium, which can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes. Specifically, the computer readable storage medium stores computer execution instructions, and the computer execution instructions are used for the range extender control method in the above embodiments.

[0201] The application further provides a computer program product, which includes computer execution instructions, and the computer execution instructions are executed by a processor to realize the range extender control method in the above embodiments.

[0202] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application cover any and all variations of the application that come within the scope of the general concept of the application and that the claims be interpreted not to be limited to the specific examples described above. The specification and examples are to be considered exemplary only, with the true scope and spirit of the application indicated by the following claims.

[0203] It is to be understood that the application is not limited to the precise construction described and shown in the drawings and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be limited only by the claims appended hereto.

Claims

1. A range extender control method, characterized in that, An application to a range extender control system, wherein an internal combustion engine and a drive motor are connected coaxially to each other in the range extender control system, and a power take-off (PTO) is integrated at the rear end of the drive motor; the method includes: After the vehicle controller in the range extender control system is powered on and performs a self-test without error, the other controllers are also powered on and perform self-tests. The other controllers include the internal combustion engine controller, battery controller, and motor controller in the range extender control system. After the other controllers have completed their self-tests without errors, the vehicle controller obtains the status information of the power source equipment fed back by the other controllers. The power source equipment includes an internal combustion engine, a high-voltage battery, and the drive motor. The vehicle controller determines the control mode based on the status information and power demand of the power source equipment, so that the range extender control system works according to the control mode to drive the power take-off. The vehicle controller determines the control mode based on the status information and power requirements of the power source equipment, including: Based on the error messages from the high-voltage battery and the drive motor, determine whether the high-voltage battery and the drive motor are fault-free; If so, the control mode is determined as the first control mode based on the power demand and the charge state information of the high-voltage battery. The first control mode includes pure electric drive mode, hybrid drive mode, and drive and power generation mode. If not, the control mode is determined to be the second control mode, which includes the internal combustion engine drive mode.

2. The range extender control method according to claim 1, characterized in that, The vehicle controller acquires status information of the power source equipment fed back by the other controllers, including: Obtain the error information of the internal combustion engine fed back by the internal combustion engine controller; Obtain the error information and charge status information of the high-voltage battery fed back by the battery controller; Obtain the error information of the drive motor fed back by the motor controller.

3. The range extender control method according to claim 2, characterized in that, After the vehicle controller obtains the status information of the power source equipment fed back by the other controllers, the system further includes: The range extender control system receives the power demand in response to the power request from the vehicle controller.

4. The range extender control method according to claim 1, characterized in that, The vehicle controller determines the control mode as the first control mode based on the power demand and the charge state information of the high-voltage battery, including: Compare the power requirement with the rated power of the drive motor; and, The charge state of the high-voltage battery is compared with a first preset charge threshold, which is used to characterize the minimum enable charge state of the high-voltage battery. If the power demand is less than the rated power of the drive motor and the charge state of the high-voltage battery is greater than the first preset charge threshold, the first control mode is determined to be a pure electric drive mode. If the power demand is greater than or equal to the rated power of the drive motor, and the charge state of the high-voltage battery is greater than the first preset charge threshold, then the first control mode is determined to be a hybrid drive mode. If the charge state of the high-voltage battery is less than the first preset charge threshold, the first control mode is determined to be the drive and power generation mode.

5. The range extender control method according to claim 1, characterized in that, If the high-voltage battery or the drive motor fails, the vehicle controller determines that the second control mode is the internal combustion engine drive mode.

6. The range extender control method according to claim 5, characterized in that, If the state of charge of the high-voltage battery is greater than or equal to the second preset charge threshold, the vehicle controller determines the control mode as the internal combustion engine drive mode, and the second preset charge threshold is used to characterize the maximum enable charge state of the high-voltage battery.

7. The range extender control method according to claim 4, characterized in that, The pure electric drive mode includes: The vehicle controller sends control commands to the battery controller and the motor controller; The battery controller controls the high-voltage battery to supply power. The electrical energy provided by the high-voltage battery is distributed by the power distribution unit to the motor controller and the drive motor. The motor controller controls the drive motor to drive the power take-off unit to work.

8. The range extender control method according to claim 4, characterized in that, The hybrid drive mode includes: The vehicle controller sends control commands to the battery controller, the motor controller, and the internal combustion engine controller; The battery controller controls the high-voltage battery to supply power, and the electrical energy provided by the high-voltage battery is distributed to the motor controller and the drive motor via the power distribution unit. While the motor controller controls the drive motor to drive the power take-off (PTO) to work, the vehicle controller controls the clutch to engage, and the drive motor drives the internal combustion engine to start. The internal combustion engine and the drive motor together drive the PTO to work.

9. The range extender control method according to claim 4, characterized in that, The driving and power generation modes include: The vehicle controller sends control commands to the battery controller, the motor controller, and the internal combustion engine controller; The battery controller controls the high-voltage battery to supply power, and the electrical energy provided by the high-voltage battery is distributed to the motor controller and the drive motor via the power distribution unit. While the motor controller controls the drive motor to work, the vehicle controller controls the clutch to engage. After the drive motor starts the internal combustion engine, it stops working. The internal combustion engine drives the power take-off unit to work while driving the drive motor to generate electricity to the high-voltage battery.

10. The range extender control method according to claim 4, characterized in that, In the hybrid drive mode, the lower boundary of the maximum economic power range of the internal combustion engine is the power source that drives the power take-off. In the driving and power generation mode, the upper boundary of the maximum economic power range of the internal combustion engine is the power source that drives the power take-off unit.

11. The range extender control method according to claim 5, characterized in that, The internal combustion engine drive mode includes: The vehicle controller sends control commands to the internal combustion engine controller; The internal combustion engine controller controls the low-voltage battery to supply power to the starter motor, the starter motor drives the internal combustion engine to start, and the vehicle controller controls the clutch to engage while the internal combustion engine drives the power take-off to work.

12. The range extender control method according to claim 11, characterized in that, After the internal combustion engine is started, the starter motor also enters the power generation state at any time in response to the power generation command of the vehicle controller.

13. The range extender control method according to claim 3, characterized in that, If the vehicle controller does not have the power request, the method further includes: The vehicle controller sends a shutdown command and a power-off command to the battery controller, the motor controller, and the internal combustion engine controller; The battery controller, the motor controller, and the internal combustion engine controller respond to the stop command and the power-down command by ceasing their respective current operations, performing self-tests, and powering down.

14. A range extender control system, said range extender control system being used to perform the method according to any one of claims 1-13, characterized in that, include: Internal combustion engine, high-voltage battery, and drive motor; The internal combustion engine is connected to the coaxial rotor of the drive motor, and a power take-off is integrated at the rear end of the drive motor; The drive motor is controlled by a motor controller, which is connected to a battery controller. The battery controller is used to control the high-voltage battery. The battery controller is also connected to the vehicle controller, which is connected to the internal combustion engine controller, which is used to control the internal combustion engine.

15. The range extender control system according to claim 14, characterized in that, Also includes: Starter motor and low-voltage battery; The starter motor is located at the front wheel train of the internal combustion engine and is connected to the internal combustion engine controller and the low-voltage battery, respectively, and has the functions of starting and generating electricity.

16. The range extender control system according to claim 14 or 15, characterized in that, It also includes: a clutch and a power distribution unit; The clutch is connected between the internal combustion engine and the drive motor; The power distribution unit is connected between the motor controller and the battery controller.

17. A computer-readable medium, characterized in that, The computer-readable medium stores instructions for computer execution, the instructions being used to perform the method as claimed in any one of claims 1 to 13.

18. A computer program product, characterized in that, The computer program product includes instructions that, when the computer program product is run on a computer, cause the computer to perform the method as described in any one of claims 1 to 13.

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