Tandem type hybrid power vehicle type full-load working condition driving starting method and system

Abstract

The invention relates to the technical field of power control of hybrid power vehicle models, and discloses a running starting method and system for a tandem type hybrid power vehicle model under a full-load working condition. According to the running starting method for the tandem type hybrid power vehicle under the full-load working condition, by obtaining the result that the maximum instantaneous available power of the battery and the current actual power of the driving motor are smaller, the power limit of the driving motor can be dynamically adjusted, and it is ensured that the driving motor operates on the premise that the power supply capacity of the battery is not exceeded; the problem that the power of the driving motor is insufficient, the torque of the driving motor falls into a pit and the like due to the fact that the available power of the battery is additionally occupied when the starting motor is started is solved, and meanwhile the problem of unexpected acceleration caused by the fact that the maximum instantaneous available power of the battery is too large can be solved. The torque limit of the driving motor is calculated according to the final power limit of the driving motor, the torque output of the driving motor is adjusted, and it can be ensured that the vehicle can keep the optimal energy utilization state under various working conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of power control of hybrid vehicle models, and in particular relates to a method and system for starting a series hybrid vehicle model under full-load conditions. Background Art

[0002] Existing driving start methods for series hybrid vehicles mainly follow a strategy of starting the engine when the driving power is close to the maximum continuous driving power limit allowed by the battery. This method can provide relatively stable power output under most conventional driving conditions, ensuring the operating efficiency of the vehicle under different driving conditions. In actual operation, the timing of engine start is closely related to the use of battery power, aiming to balance power demand and energy consumption.

[0003] However, this existing starting method has a significant problem: since the priority of the starter motor power allocation is higher than that of the drive motor, during the engine starting process, the starter motor will consume additional allowable power of the battery. This leads to a direct consequence that the driving power of the drive motor will be weakened. Specifically, when the battery needs to meet the power requirements of the starter motor and the drive motor at the same time, since the starter motor has a higher priority, it will first occupy the power resources of the battery, thereby reducing the power available to the drive motor.

[0004] This imbalance in power distribution will cause a series of driving problems. Due to insufficient power of the drive motor, its torque output will be affected, resulting in the so-called "torque drop" phenomenon. This phenomenon is manifested as a sudden drop in the torque of the drive motor, resulting in unstable drive motor speed, which in turn causes obvious shaking and impact of the entire vehicle at the moment of starting. This not only affects driving comfort, but may also pose a potential threat to the overall performance and safety of the vehicle. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned problems and to provide a method and system for starting a series hybrid vehicle under full-load conditions, so as to solve the problem of a drop in the torque of the drive motor and a shaking impact of the whole vehicle caused by insufficient short-term driving power during starting, while also avoiding the acceleration shock and shaking problem caused by a sudden upward change in the torque of the drive motor due to excessive maximum instantaneous available power of the battery.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for starting a series hybrid vehicle under full load conditions, comprising the following steps: Obtain the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor, and the actual power consumption of the starter motor; The remaining power of the battery is obtained according to the maximum instantaneous available power and the actual power consumption of the starting motor; Compare the remaining power of the battery with the current actual power consumption of the drive motor, and take the smaller value of the two as the final power limit of the drive motor; The torque limit of the drive motor is calculated according to the final power limit of the drive motor, and the torque output of the drive motor is adjusted.

[0007] A further improvement of the present invention is that the specific method of taking the smaller value of the two as the final power limit of the drive motor is as follows: Calculate the actual power consumption of the starter motor, subtract the actual power consumption of the starter motor from the maximum instantaneous available power of the battery to obtain the remaining power of the battery; The remaining battery power is compared with the current actual power consumption of the drive motor, and the smaller value of the two is taken as the final power limit of the drive motor.

[0008] A further improvement of the present invention is that it also includes the following steps: after the starter motor is started, the power distribution of the drive motor is dynamically adjusted according to the remaining power of the battery and the required power of the drive motor.

[0009] A further improvement of the present invention is that in the step of dynamically adjusting the power distribution of the drive motor, the remaining power and temperature of the battery and the required power of the drive motor are monitored, and the power distribution strategy is adjusted according to the monitoring results.

[0010] A further improvement of the present invention is that it also includes the following steps: during the starting process of the starter motor, the instantaneous maximum available power of the battery is preferentially allocated to the starter motor, and the remaining power is used to drive the motor.

[0011] A further improvement of the present invention is that the calculation formula of the torque limit is: torque limit=9550*final power limit / motor speed.

[0012] In a second aspect, the present invention further provides a full-load driving start system for a series hybrid vehicle, comprising the following modules: A power acquisition module is used to acquire the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor and the actual power consumption of the starter motor; A power calculation module is used to obtain the remaining power of the battery according to the maximum instantaneous available power and the actual power consumption of the starting motor; A power comparison module is used to compare the remaining power of the battery with the current actual power consumption of the drive motor, and take the smaller value of the two as the final power limit of the drive motor; The torque adjustment module calculates the torque limit of the drive motor according to the final power limit of the drive motor and adjusts the torque output of the drive motor.

[0013] A further improvement of the present invention is that it also includes a residual power calculation module, which is used to calculate the actual power consumption of the starter motor and subtract the actual power consumption of the starter motor from the maximum instantaneous available power of the battery to obtain the residual power; The final power limit module is used to compare the remaining power with the current actual power of the drive motor, and take the smaller value of the two as the final power limit of the drive motor.

[0014] In a third aspect, the present invention further provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for starting a series hybrid vehicle under full-load conditions when executing the computer program.

[0015] In a fourth aspect, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned method for starting a series hybrid vehicle under full-load conditions are implemented.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can dynamically adjust the power limit of the drive motor by obtaining the smaller result of the maximum instantaneous available power of the battery and the current actual power of the drive motor, thereby ensuring that the drive motor operates under the premise of not exceeding the power supply capacity of the battery, avoiding excessive discharge of the battery due to excessive power of the drive motor, and compensating for the vehicle shaking problems such as insufficient power of the drive motor and torque drop of the drive motor caused by the additional occupation of the battery available power when the starter motor is started, and at the same time, it can avoid the problem of unexpected acceleration caused by the excessive maximum instantaneous available power of the battery; the torque limit of the drive motor is calculated according to the final power limit of the drive motor, and its torque output is adjusted, so as to ensure that the vehicle can maintain the best energy utilization state under various working conditions, which helps to extend the battery life and reduce unnecessary energy consumption; by adjusting the torque output of the drive motor, it can avoid damage to the drive motor due to overload, which helps to maintain the stability and reliability of the drive system and improve the overall performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are only schematic, used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention.

[0018] Figure 1 is a flow chart of the method of the present invention; Figure 2 is a system flow chart of the present invention; Figure 3 A control flow chart of an embodiment of the present invention; Figure 4 This is a system diagram of Example 4 of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings: Embodiment 1: like Figure 1 As shown, a method for starting a series hybrid vehicle under full-load conditions comprises the following steps: S1, obtaining the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor and the actual power consumption of the starter motor; S2, obtaining the remaining power of the battery according to the maximum instantaneous available power and the actual power consumption of the starting motor; During the starting process of the starter motor, the instantaneous maximum available power of the battery is preferentially allocated to the starter motor, and the remaining power is used to drive the motor; S3, comparing the remaining power of the battery with the current actual power consumption of the drive motor, and taking the smaller value of the two as the final power limit of the drive motor; S4, calculating the torque limit of the drive motor according to the final power limit of the drive motor, and adjusting the torque output of the drive motor; Furthermore, after the starter motor is started, the power distribution of the drive motor is dynamically adjusted according to the remaining power of the battery and the required power of the drive motor. The power distribution strategy is adjusted according to the monitoring results by monitoring the remaining power and temperature of the battery and the required power of the drive motor.

[0026] Furthermore, the calculation formula of the torque limit is: torque limit=9550*final power limit / motor speed.

[0027] Embodiment 2: like Figure 2 As shown, a full-load driving starting system for a series hybrid vehicle includes the following modules: A power acquisition module is used to acquire the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor and the actual power consumption of the starter motor; A power calculation module is used to obtain the remaining power of the battery according to the maximum instantaneous available power and the actual power consumption of the starting motor; A power comparison module is used to compare the remaining power of the battery with the current actual power consumption of the drive motor, and take the smaller value of the two as the final power limit of the drive motor; The torque adjustment module calculates the torque limit of the drive motor according to the final power limit of the drive motor and adjusts the torque output of the drive motor.

[0028] Furthermore, it also includes a residual power calculation module, which is used to calculate the actual power consumption of the starter motor and subtract the actual power consumption of the starter motor from the maximum instantaneous available power of the battery to obtain the residual power; The final power limit module is used to compare the remaining power with the current actual power of the drive motor, and take the smaller value of the two as the final power limit of the drive motor.

[0029] Embodiment 3: like Figure 3 As shown, a method for starting a series hybrid vehicle under full-load conditions specifically includes: Step S10, when the vehicle needs to be started, calculating the required power of the starter motor, and determining whether the required power exceeds the maximum available power of the battery; Step S20, if the required power of the starter motor exceeds the maximum available power of the battery, limiting the power of the starter motor to not exceed its maximum power; Step S30, calculating the power limit of the drive motor according to the difference between the maximum instantaneous available power of the battery and the actual power consumption of the starter motor, and the current actual power consumption of the drive motor, and taking the smaller value of the two as the final drive motor power limit; Step S40, calculating the power limit of the starter motor, taking the smaller value between the requested power of the starter motor and the instantaneous maximum available power of the battery; Step S50, converting the power limit of the starter motor into a torque limit, the calculation formula of the torque limit is: torque limit = 9550 * final power limit / motor speed; Step S60, the hybrid control unit HCU constrains the torque of the starter motor according to the calculated torque limit; Step S70, the management system MS further constrains the torque of the starting motor according to the normal continuous available maximum power limit to ensure the safety and stability of the starting process; Step S80, starting the engine to complete the vehicle starting process.

[0030] In an embodiment of the present invention, a method for starting a series hybrid vehicle under full load conditions is provided. By comprehensively considering the required power of the starter motor, the maximum available power of the battery, and the maximum instantaneous available power of the battery, the method can effectively solve the driving problems such as vehicle shaking and impact caused by the sudden drop of the wheel-end driving torque due to the insufficient maximum continuous available power of the battery during the driving and starting process of the series hybrid vehicle under full load conditions. Specifically, the present invention limits the power of the starter motor to not exceed the smaller value of its requested power and the instantaneous maximum available power of the battery, and calculates the power limit of the drive motor according to the difference between the maximum instantaneous available power of the battery and the actual power consumption of the starter motor, as well as the current actual power consumption of the drive motor, thereby avoiding the pit phenomenon of the drive motor torque, ensuring the smooth change of the drive motor torque, and thus improving the smoothness and comfort of the vehicle driving. In addition, the present invention also converts the power limit into the torque limit through the calculation formula of the torque limit, and constrains the torque of the starter motor accordingly, further ensuring the safety and stability of the starting process.

[0031] Embodiment 4: See also Figure 4 As shown, the present invention also provides an electronic device 100 for a full-load driving starting method for a series hybrid vehicle; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on the at least one processor 102, and at least one communication bus 104.

[0032] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of the full-load driving start method of the series hybrid vehicle model described in Example 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101. The memory 101 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data (such as audio data) created according to the use of the electronic device 100, etc. In addition, the memory 101 can include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0033] The at least one processor 102 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or any conventional processor, etc. The processor 102 is the control center of the electronic device 100, and uses various interfaces and lines to connect various parts of the entire electronic device 100.

[0034] The memory 101 in the electronic device 100 stores a plurality of instructions to implement a method for starting a series hybrid vehicle under full-load conditions. The processor 102 can execute the plurality of instructions to implement: Obtain the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor, and the actual power consumption of the starter motor; The remaining power of the battery is obtained according to the maximum instantaneous available power and the actual power consumption of the starting motor; Compare the remaining power of the battery with the current actual power consumption of the drive motor, and take the smaller value of the two as the final power limit of the drive motor; The torque limit of the drive motor is calculated according to the final power limit of the drive motor, and the torque output of the drive motor is adjusted.

[0035] Embodiment 5: If the module / unit integrated in the electronic device 100 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory and read-only memory (ROM, Read-Only Memory).

[0036] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0037] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0038] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0039] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for starting a series hybrid vehicle under full load conditions, characterized in that: The following steps are involved: Obtain the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor, and the actual power consumption of the starter motor; The remaining power of the battery is obtained according to the maximum instantaneous available power and the actual power consumption of the starting motor; Compare the remaining power of the battery with the current actual power consumption of the drive motor, and take the smaller value of the two as the final power limit of the drive motor; The torque limit of the drive motor is calculated according to the final power limit of the drive motor, and the torque output of the drive motor is adjusted.

2. A method for starting a series hybrid vehicle under full load conditions according to claim 1, characterized in that: The specific method of taking the smaller value of the two as the final power limit of the driving motor is as follows: Calculate the actual power consumption of the starter motor, subtract the actual power consumption of the starter motor from the maximum instantaneous available power of the battery to obtain the remaining power of the battery; The remaining battery power is compared with the current actual power consumption of the drive motor, and the smaller value of the two is taken as the final power limit of the drive motor.

3. A method for starting a series hybrid vehicle under full load conditions according to claim 2, characterized in that: The following steps are also included: After the starter motor is started, the power distribution of the drive motor is dynamically adjusted according to the remaining power of the battery and the required power of the drive motor.

4. A method for starting a series hybrid vehicle under full load conditions according to claim 3, characterized in that: In the step of dynamically adjusting the power distribution of the drive motor, the remaining power and temperature of the battery and the required power of the drive motor are monitored, and the power distribution strategy is adjusted according to the monitoring results.

5. The method for starting a series hybrid vehicle under full load conditions according to claim 1, characterized in that: The following steps are also included: During the starter motor starting process, the instantaneous maximum available power of the battery is preferentially allocated to the starter motor, and the remaining power is used to drive the motor.

6. The method for starting a series hybrid vehicle under full load conditions according to claim 1, characterized in that: The calculation formula of the torque limit is: torque limit=9550*final power limit / motor speed.

7. A full-load driving starting system for a series hybrid vehicle, characterized in that: Includes the following modules: A power acquisition module is used to acquire the maximum instantaneous available power of the battery, the current actual power consumption of the drive motor and the actual power consumption of the starter motor; A power calculation module is used to obtain the remaining power of the battery according to the maximum instantaneous available power and the actual power consumption of the starting motor; A power comparison module is used to compare the remaining power of the battery with the current actual power consumption of the drive motor, and take the smaller value of the two as the final power limit of the drive motor; The torque adjustment module calculates the torque limit of the drive motor according to the final power limit of the drive motor and adjusts the torque output of the drive motor.

8. A full-load driving starting system for a series hybrid vehicle according to claim 7, characterized in that: It also includes a residual power calculation module, which is used to calculate the actual power consumption of the starter motor and subtract the actual power consumption of the starter motor from the maximum instantaneous available power of the battery to obtain the residual power; The final power limit module is used to compare the remaining power with the current actual power of the drive motor, and take the smaller value of the two as the final power limit of the drive motor.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for starting a series hybrid vehicle under full-load conditions as described in any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, the steps of the method for starting a series hybrid vehicle under full-load conditions are implemented as claimed in any one of claims 1 to 6.

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