Power system control method and system and vehicle

Abstract

The invention relates to the technical field of vehicle power control, in particular to a control method and system of a power system and a vehicle. The method is suitable for a full-accelerator acceleration working condition and comprises the steps that the real-time vehicle speed and gear are obtained to calculate the current maximum driving power of an engine; calculating first driving power of the power system; acquiring basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate second driving power of the power system; and switching the driving modes in real time according to different driving powers so as to control the engine to output the target electric driving power. According to the comparison result of the maximum driving power of each power unit in the series connection mode and the parallel connection mode, the corresponding working mode is switched to ensure that the power system works in the optimal power state. The maximum driving capacity of the driving system is brought into full play, capacity waste caused by insufficient power application of the driving system is avoided, and the experience of a driver is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power control, and in particular to a control method, system and vehicle of a power system. Background Art

[0002] The current hybrid vehicle acceleration process determines whether to switch from series to parallel based on vehicle speed. However, when the driver accelerates at full throttle and requires the engine to be at maximum output power, the hybrid system cannot meet the engine's maximum output power requirements.

[0003] The reason why existing hybrid power systems cannot exert the maximum power of the system is that under different battery pack charge states and vehicle speed conditions, the power of the series hybrid power system and the parallel hybrid power system is different. If the working mode of the hybrid power system is switched at a fixed vehicle speed, the maximum power of the power system after switching will be lower than that before switching. Summary of the invention

[0004] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention proposes a control method, system and vehicle of a power system.

[0005] According to a control method of a power system of an embodiment of a first aspect of the present invention, the power system includes a power supply unit and a drive unit, the power supply unit includes a generator and a battery pack, and the method is applicable to a full throttle acceleration condition, including: S100, obtaining the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine; S200, calculating a first driving power of a power system according to the current maximum driving power of the engine; S300, obtaining basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system; S400: Switching a driving mode of a power system in real time according to the first driving power and the second driving power to control an engine to output a target electric driving power.

[0006] In a possible implementation manner of the first aspect, the S100 includes: S101, obtaining the real-time speed and gear position of the target vehicle to calculate the engine speed: RPM_CRS=V*Gr*FDR / 0.377 / Rt; Where RPM_CRS is the engine speed, V is the real-time vehicle speed, Gr is the transmission ratio of the gearbox in the current gear, FDR is the main reduction ratio, and Rt is the tire rolling radius; S102, obtaining the maximum driving torque of the current engine according to the engine speed; S103: Calculate the current maximum driving power of the engine according to the maximum driving torque of the engine.

[0007] In a possible implementation manner of the first aspect, the S200 further includes: S201, obtaining the peak discharge power P of the target vehicle battery pack 放电 To calculate the first energy supply power P G1 ,in: P G1 =P 放电 *η1*η2, Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; S202, obtaining the maximum power of each driving motor in the driving unit to calculate the maximum output power P of the driving unit Qmax ; S203: the first energy supply power P G1 and the maximum output power P Qmax Compare and take the smaller value as the first electric drive power; S204: Calculate a first driving power P1 of a power system according to the current maximum driving power of the engine and the first electric driving power.

[0008] In a possible implementation manner of the first aspect, the S300 includes: S301, obtaining basic information of the target vehicle to determine the current peak discharge power P of the generator E , the target vehicle basic information includes engine parameters, generator parameters, current generator voltage of the target vehicle's real-time speed; S302, based on the current peak discharge power P of the generator E And the peak discharge power of the battery pack P 放电 To calculate the second energy supply power P G2 , P G2 =(P 放电 +P E )*η1*η2, Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; S303, obtaining the maximum power of each driving motor in the driving unit to calculate the maximum output power P of the driving unit Qmax ; S304: the second energy supply power P G2 and the maximum output power P Qmax Compare and take the smaller value as the second driving power P2.

[0009] In a possible implementation manner of the first aspect, the S400 includes: S401, determining whether the first driving power P1 is less than the second driving power P2; S402, if yes, the power system switches the driving mode to the series mode, and the power system controls the engine to output the target electric driving power; S403: If not, the power system switches the driving mode to the parallel mode, and the power system controls the engine to output the target electric driving power.

[0010] In a possible implementation of the first aspect, in S201, the peak discharge power P of the target vehicle battery pack is obtained. 放电 Specifically, the state of charge of the battery pack, the current temperature of the battery cell, the current health state of the battery, and the discharge duration of the battery pack are obtained to query the peak discharge power P of the battery pack. 放电 .

[0011] In a possible implementation of the first aspect, S301 includes obtaining basic information of the target vehicle and the current operating environment and calculating the first discharge power P of the engine end. E1 and the second discharge power P at the generator end E2以 Determine the current peak discharge power P of the generator E .

[0012] In a possible implementation manner of the first aspect, the method further includes obtaining an accelerator pedal opening to determine whether the target vehicle is in a full throttle acceleration condition.

[0013] According to the control method of the power system of the embodiment of the present invention, under the full throttle acceleration condition, according to the comparison result of the maximum driving power of each power unit (including the energy supply unit and the drive unit) in the series mode and the maximum driving power of each power unit in the parallel mode, the corresponding working mode can be switched to ensure that the power system works in the best power (power) state. According to the control method of the power system of the embodiment of the present invention, on the one hand, under the full throttle acceleration condition, the power arbitration method under different driving modes is adopted to give full play to the maximum driving capacity of the drive system, avoiding the waste of power caused by insufficient power application of the drive subsystem, and greatly improving the driver experience; on the other hand, the control method of the power system of the embodiment of the present invention can avoid the disadvantage of switching modes under a single boundary condition and failing to take into account the needs of various scenarios.

[0014] A power control system under full throttle acceleration conditions according to a second aspect of an embodiment of the present invention includes: An acquisition module is used to obtain the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine; A first calculation module, for calculating a first driving power of a power system according to a current maximum driving power of the engine; A second calculation module, acquiring basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system; The control module switches the driving mode of the power system in real time according to the first driving power and the second driving power to control the engine to output the target electric driving power.

[0015] According to a vehicle of an embodiment of the third aspect of the present invention, the vehicle is equipped with a power control system under full throttle acceleration conditions, and the control system is used to execute the power control method under full throttle acceleration conditions as described above.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a flow chart of a control method of a power system according to an embodiment of the present invention; Figure 2 is a specific flow chart of step S100 in the method for controlling a power system according to an embodiment of the present invention; Figure 3 It is a specific flow chart of step S200 in the method for controlling a power system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] The terms "first", "second", "third", etc. in the specification and claims of the present application and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a series of steps or units are included, or optionally, steps or units not listed are included, or optionally, other steps or units inherent to these processes, methods, products or devices are included.

[0023] Only the part relevant to the present application is shown in the accompanying drawings, but not all of the content. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processing or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. When its operation is completed, the process can be terminated, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0024] The terms "component", "module", "system", "unit", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or distributed between two or more computers. In addition, these units can be executed from various computer-readable media having various data structures stored thereon. Units can communicate through local and / or remote processes, for example, based on signals having one or more data packets (e.g., data from a second unit interacting with another unit in a local system, a distributed system, and / or a network. For example, the Internet interacts with other systems via signals).

[0025] Example 1 See also Figure 1 As shown, this embodiment provides a control method for a power system, wherein the power system includes a power supply unit and a drive unit, the power supply unit includes a generator and a battery pack, the drive unit includes a first drive motor and a second drive motor, and the method is applicable to full throttle acceleration conditions, including: S100, obtaining the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine, wherein S100 includes: S101, obtaining the real-time speed and gear position of the target vehicle to calculate the engine speed: RPM_CRS=V*Gr*FDR / 0.377 / Rt; Wherein, RPM_CRS is the engine speed, unit: rad / s, V is the real-time vehicle speed, unit: km / h, Gr is the transmission ratio of the gearbox in the current gear, FDR is the main reduction ratio, and Rt is the tire rolling radius, unit: m. The transmission ratio Gr and the main reduction ratio FDR in the current gear and the tire rolling radius Rt can be directly extracted from the basic information of the target vehicle or directly provided by the production supplier.

[0026] S102, obtaining the maximum driving torque of the current engine according to the engine speed, specifically including looking up a table according to the calculated engine speed combined with the current engine ambient temperature process to obtain the maximum driving torque of the current engine, wherein a sensor is installed in the engine mounting bench accessory, and the current engine ambient temperature is obtained through the sensor. Due to the adverse effects of high temperature environment on engine performance, certain parameters of the engine need to be adjusted according to the ambient temperature to maintain the optimal performance of the engine. In this embodiment, the performance parameter table of the engine can be provided by the supplier or obtained by bench testing. The testing process is a conventional method in this industry and will not be repeated here.

[0027] S103, calculating the current maximum driving power of the engine according to the maximum driving torque of the engine, wherein the relationship between the current maximum driving power (P) of the engine and the maximum driving torque (T) of the engine can be expressed by the following mathematical formula: P = T × ω; Where ω represents the current angular velocity of the engine, ω=(current engine speed at maximum torque × 2 × π) / 60, which can accurately obtain the current maximum driving power of the engine.

[0028] S200, calculating a first driving power P1 of a power system according to the current maximum driving power of the engine; S300, obtaining basic information of the target vehicle and the peak discharge efficiency of the battery pack to calculate the second driving power of the power system, wherein the peak discharge efficiency of the battery pack can be obtained by looking up the state of charge information of the battery pack, the current battery pack cell temperature, the battery health status and the continuous discharge time of the battery pack. The S300 includes: S301, obtaining basic information of the target vehicle to determine the current peak discharge power P of the generator E, the target vehicle basic information includes engine parameters, generator parameters, current generator voltage of the target vehicle's real-time speed; S302, based on the current peak discharge power P of the generator E And the peak discharge power of the battery pack P 放电 To calculate the second energy supply power P G2 , P G2 =(P 放电 +P E )*η1*η2, Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; S303, obtaining the maximum power of each driving motor in the driving unit to calculate the maximum output power P of the driving unit Qmax ; S304: the second energy supply power P G2 and the maximum output power P Qmax Compare and take the smaller value as the second driving power P2; S400, switching the driving mode of the power system in real time according to the first driving power and the second driving power to control the engine to output a target electric driving power, the S400 comprising: S401, determining whether the first driving power P1 is less than the second driving power P2; S402, if yes, the power system switches the driving mode to the series mode, and the power system controls the engine to output the target electric driving power; S403: If not, the power system switches the driving mode to the parallel mode, and the power system controls the engine to output the target electric driving power.

[0029] It should be noted that the S200 also includes: S201, obtaining the peak discharge power P of the target vehicle battery pack 放电 To calculate the first energy supply power P G1 ,in: P G1 =P 放电 *η1*η2, Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; It should be noted that, in this embodiment, the electronic control efficiency of the drive motor and the efficiency of the transmission system can be obtained through component bench testing, and can be provided by component suppliers during the development process.

[0030] S202, obtaining the maximum power of each driving motor in the driving unit to calculate the maximum output power P of the driving unit Qmax In this embodiment, the front and rear motors are taken as an example, wherein P Qmax =P D1 *η3+P D2 *η4; Where P D1 is the maximum output power of the front motor, η3 is the transmission efficiency of the front motor, P D2 is the maximum output power of the rear motor, and η4 is the transmission efficiency of the rear motor.

[0031] S203, the first energy supply power P G1 and the maximum output power P Qmax Compare and take the smaller value as the first electric drive power; S204, calculating a first driving power P1 of a power system according to the current maximum driving power of the engine and the first electric driving power, wherein P1=first electric driving power+current maximum driving power of the engine*transmission efficiency, and the transmission efficiency is provided by a supplier.

[0032] It should be noted that the driving mode includes a series mode and a parallel mode. In the series mode, the power system is configured with a second driving power P2; In the parallel mode, the power system is configured with a first driving power P1.

[0033] It should be noted that in S201, the peak discharge power P of the target vehicle battery pack is obtained. 放电 Specifically, the state of charge of the battery pack, the current temperature of the battery cell, the current health state of the battery, and the discharge duration of the battery pack are obtained to query the peak discharge power P of the battery pack. 放电 .

[0034] It should be noted that the peak discharge power P of the battery pack can be queried according to the charge state of the battery pack, the current temperature of the battery cell, the current health state of the battery, and the battery pack discharge duration comparison table. 放电 , where the data sheet can be provided by the supplier or obtained by bench testing. The testing process is a conventional method in this industry and will not be repeated here.

[0035] It should be noted that the S301 includes obtaining the basic information of the target vehicle and the current operating environment and calculating the first discharge power P of the engine end. E1 and the second discharge power P at the generator end E2以 Determine the current peak discharge power P of the generator E , including: S3011, obtaining the current temperature of the target vehicle's engine, the engine's transmission efficiency, and the generator's power generation efficiency, and obtaining the maximum series discharge power of the engine according to the current engine temperature; S3012, calculating the first discharge power P at the engine end according to the maximum discharge power of the engine in series, the engine transmission efficiency and the generator power generation efficiency E1 , specifically: The first discharge power P E1 = Maximum discharge power of engine in series * engine transmission efficiency * generator power generation efficiency, The maximum discharge power of the engine in series can be obtained by looking up the table based on the current temperature of the engine. The engine transmission efficiency refers to the transmission efficiency between the engine and the generator, which can be obtained by bench testing or provided by the supplier. The generator power generation efficiency can be obtained based on the generator power generation efficiency chart.

[0036] S3013, obtaining the current speed, current voltage, and current temperature of the target vehicle engine to query the maximum power generation of the generator and the power generation efficiency of the generator; S3014, calculating the second discharge power P at the generator end according to the maximum power generation power of the generator and the power generation efficiency of the generator E2 , specifically: The second discharge power P E1 = Maximum power generation of generator * generator power generation efficiency; S3015, the first discharge power P E1 and the second discharge power P E2 Compare and take the smaller value as the current peak discharge power P of the generator. E .

[0037] It should be noted that the method also includes obtaining the accelerator pedal opening to determine whether the target vehicle is in a full throttle acceleration condition. Specifically, it includes: Obtain the accelerator pedal opening of the target vehicle; Determining whether the accelerator pedal opening exceeds a first preset threshold; If so, the target vehicle is in a full throttle acceleration condition and the control method of the power system of the present application can be executed.

[0038] It should be noted that, in this embodiment, the first preset threshold is 90%, and the default driver intention is full throttle acceleration, and the target vehicle is in a full throttle acceleration condition.

[0039] It should be noted that, in this embodiment, an accelerator pedal position sensor is selected and installed on the accelerator pedal to ensure that it can accurately sense the displacement of the pedal, wherein the accelerator pedal position sensor is preferably a Hall sensor, which can sense the displacement of the pedal and convert it into an electrical signal. This electrical signal will be transmitted to the electronic control unit of the target vehicle, and the electronic control unit of the target vehicle obtains the accelerator pedal opening according to the signal.

[0040] According to the control method of the power system of the embodiment of the present invention, under the full throttle acceleration condition, according to the comparison result of the maximum driving power of each power unit (including the energy supply unit and the drive unit) in the series mode and the maximum driving power of each power unit in the parallel mode, the corresponding working mode can be switched to ensure that the power system works in the best power (power) state. According to the control method of the power system of the embodiment of the present invention, on the one hand, under the full throttle acceleration condition, the power arbitration method under different driving modes is adopted to give full play to the maximum driving capacity of the drive system, avoiding the waste of power caused by insufficient power application of the drive subsystem, and greatly improving the driver experience; on the other hand, the control method of the power system of the embodiment of the present invention can avoid the disadvantage of switching modes under a single boundary condition and failing to take into account the needs of various scenarios.

[0041] The present embodiment and the prior art (comparative example) were tested and verified respectively, and the following two different full throttle acceleration conditions were analyzed, and the effects were as follows: (I) When in full throttle acceleration condition with increasing speed, the vehicle that does not adopt the technical solution of the present invention (hereinafter referred to as the comparative vehicle) switches the power system to parallel mode after the vehicle speed reaches 60km / h. At this time, in the stage of 60km / h to 120km / h, the power unit of the power system cannot exert the driving power that is more advantageous in series mode than in parallel mode. Specifically, the acceleration time at 60km / h to 100km / h is about 1s slower than that of the vehicle adopting the technical solution of this embodiment, and the difference in dynamic feeling (acceleration) is 25%; the acceleration time at 80km / h to 120km / h is about 1.5s slower than that of the vehicle adopting the technical solution of this embodiment, and the difference in dynamic feeling (acceleration) is 30%.

[0042] (ii) When the vehicle is in full throttle acceleration condition where the vehicle speed reaches the maximum speed and cannot increase, at an ambient temperature of 40°C, a vehicle that does not adopt the technical solution of the present invention will remain in series mode at high speed due to the lack of power arbitration. The maximum speed is restricted by the discharge capacity of the generator at high temperature. The generator has poor capacity in a high temperature environment, so that the maximum speed of the vehicle can only reach 110 km / h. A vehicle that adopts the technical solution of the present invention will perform power arbitration at high speeds, and the drive mode will be switched to parallel mode, which can give full play to the advantages of the engine's direct drive power and achieve a maximum speed of 145 km / h.

[0043] It can be seen from actual measurement and analysis that the present invention, for the full-throttle acceleration condition, adopts a power arbitration method under different driving modes to fully exert the maximum driving capacity of the drive system, avoids capacity waste due to insufficient power application of the drive subsystem, and greatly improves the driver experience.

[0044] Example 2 This embodiment provides a power control system under full throttle acceleration conditions, which includes: An acquisition module is used to obtain the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine; A first calculation module, for calculating a first driving power of a power system according to a current maximum driving power of the engine; A second calculation module, acquiring basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system; The control module switches the driving mode of the power system in real time according to the first driving power and the second driving power to control the engine to output the target electric driving power.

[0045] It should be noted that the power system includes a power supply unit and a drive unit. The power supply unit includes a generator and a battery pack. The drive unit includes a first motor (that is, the front motor in the drive assembly) and a second motor (that is, the rear motor in the drive assembly). The power control system of this embodiment is used for full throttle acceleration conditions.

[0046] In the embodiment of the present application, a power control system under full throttle acceleration condition can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. The non-mobile electronic device can be a server, a network attached storage (NAS), a personal computer (PC), etc., which is not specifically limited in the embodiment of the present application.

[0047] In the embodiment of the present application, a power control system under full throttle acceleration conditions may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0048] The power control system provided in the embodiment of the present application under full throttle acceleration condition can achieve Figure 1 The various processes of implementing the power control under full throttle acceleration conditions in a method embodiment will not be described here to avoid repetition.

[0049] According to a power control system under full throttle acceleration conditions of the present embodiment, the beneficial effects are as follows: under full throttle acceleration conditions, according to the comparison results of the maximum driving power of each power unit (including the energy supply unit and the drive unit) in the series mode and the maximum driving power of each power unit in the parallel mode, it is possible to switch to the corresponding working mode to ensure that the power system operates in the optimal power (power) state. The power system according to the embodiment of the present invention, under full throttle acceleration conditions, adopts a power arbitration method under different driving modes to give full play to the maximum driving capacity of the drive system, avoids the waste of power due to insufficient power application of the drive subsystem, and greatly improves the driver experience; on the other hand, the control method of the power system according to the embodiment of the present invention can avoid the disadvantage of switching modes under a single boundary condition and failing to take into account the needs of various scenarios. Optionally, an embodiment of the present application also provides an electronic device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, each process of the power control embodiment under the above-mentioned full throttle acceleration condition is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0050] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the power control embodiment under the above-mentioned full throttle acceleration condition is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0051] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0052] Example 3 This embodiment provides a vehicle, wherein the vehicle is equipped with a power control system under full throttle acceleration conditions, and the control system is used to execute the power control method under full throttle acceleration conditions as described above.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation to the invention.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0055] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control method for a power system, characterized in that: The power system includes a power supply unit and a drive unit, the power supply unit includes a generator and a battery pack, and the method is applicable to full throttle acceleration conditions, including: S100, obtaining the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine; S200, calculating a first driving power of a power system according to the current maximum driving power of the engine; S300, obtaining basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system; S400: Switching a driving mode of a power system in real time according to the first driving power and the second driving power to control an engine to output a target electric driving power.

2. The control method of the power system according to claim 1, characterized in that: The S100 includes: S101, obtaining the real-time speed and gear position of the target vehicle to calculate the engine speed: RPM_CRS=V*Gr*FDR / 0.377 / Rt; Where RPM_CRS is the engine speed, V is the real-time vehicle speed, Gr is the transmission ratio of the gearbox in the current gear, FDR is the main reduction ratio, and Rt is the tire rolling radius; S102, obtaining the maximum driving torque of the current engine according to the engine speed; S103: Calculate the current maximum driving power of the engine according to the maximum driving torque of the engine.

3. The control method of the power system according to claim 1, characterized in that: The S200 further includes: S201, obtaining the peak discharge power P of the target vehicle battery pack 放电 To calculate the first energy supply power P G1 ,in: P G1 =P 放电 *η1*η2, Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; S202, obtaining the maximum power of each driving motor in the driving unit to calculate the maximum output power P of the driving unit Qmax ; S203: the first energy supply power P G1 and the maximum output power P Qmax Compare and take the smaller value as the first electric drive power; S204: Calculate a first driving power P1 of a power system according to the current maximum driving power of the engine and the first electric driving power.

4. The control method of the power system according to claim 1, characterized in that: The S300 includes: S301, obtaining basic information of the target vehicle to determine the current peak discharge power P of the generator E , the basic information includes engine parameters, generator parameters, current generator voltage of the target vehicle at real-time speed; S302, based on the current peak discharge power P of the generator E And the peak discharge power of the battery pack P 放电 To calculate the second energy supply power P G2 , P G2 =(P 放电 +P E )*η1*η2, Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; S303, obtaining the maximum power of each driving motor in the driving unit to calculate the maximum output power P of the driving unit Qmax ; S304: the second energy supply power P G2 and the maximum output power P Qmax Compare and take the smaller value as the second driving power P2.

5. The control method of the power system according to claim 1, characterized in that: The S400 includes: S401, determining whether the first driving power P1 is less than the second driving power P2; S402, if yes, the power system switches the driving mode to the series mode, and the power system controls the engine to output the target electric driving power; S403: If not, the power system switches the driving mode to the parallel mode, and the power system controls the engine to output the target electric driving power.

6. The control method of the power system according to claim 3, characterized in that: S201 includes obtaining the state of charge of the battery pack, the current temperature of the battery cell, the current health state of the battery, and the discharge duration of the battery pack to query the peak discharge power P of the battery pack. 放电 .

7. The control method of the power system according to claim 6, characterized in that: S301 includes obtaining basic information of the target vehicle and the current operating environment and calculating the first discharge power P of the engine end. E1 and the second discharge power P at the generator end E2 To determine the current peak discharge power P of the generator E , the basic information includes engine parameters and generator parameters.

8. The control method of the power system according to claim 6, characterized in that: The method also includes obtaining the accelerator pedal opening to determine whether the target vehicle is in a full throttle acceleration condition.

9. A power control system under full throttle acceleration conditions, characterized in that: include: An acquisition module is used to obtain the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine; A first calculation module, for calculating a first driving power of a power system according to a current maximum driving power of the engine; A second calculation module, acquiring basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system; The control module switches the driving mode of the power system in real time according to the first driving power and the second driving power to control the engine to output the target electric driving power.

10. A vehicle, characterized in that: The vehicle is equipped with a power control system, and the control system is used to execute the power control method according to any one of claims 1 to 8.

Images