A control method, system and vehicle for a power system

Abstract

The present invention relates to the field of vehicle power control technology, and in particular to a control method, system and vehicle for a power system. It is applicable to full throttle acceleration conditions, including: obtaining real-time vehicle speed and gear position to calculate the current maximum driving power of the engine; thereby calculating the first driving power of the power system; 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; and switching the driving mode in real time according to different driving powers to control the engine to output the target electric driving power. The present invention switches to the corresponding working mode based on the comparison results of the maximum driving power of each power unit in the series mode and the parallel mode to ensure that the power system works in the optimal power state. It fully utilizes the maximum driving capacity of the drive system, avoids the waste of power caused by insufficient power application of the drive system, and greatly improves the driver experience.

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] Current hybrid models switch from series to parallel operation based on vehicle speed during acceleration. However, when the driver accelerates at full throttle and demands maximum engine power, the hybrid system cannot meet this demand.

[0003] The reason why existing hybrid power systems cannot exert their maximum system power is that under different battery pack charge states and vehicle speed conditions, the power of the series hybrid system and the parallel hybrid system is different. If the operating mode of the hybrid 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 provides a control method, system and vehicle for a power system.

[0005] According to a first aspect of an embodiment of the present invention, a control method for a 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:

[0006] S100, obtaining the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine;

[0007] S200, calculating a first driving power of a power system according to the current maximum driving power of the engine;

[0008] 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;

[0009] 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.

[0010] In a possible implementation of the first aspect, S100 includes:

[0011] S101, obtaining the real-time speed and gear position of the target vehicle to calculate the engine speed:

[0012] RPM_CRS=V*Gr*FDR / 0.377 / Rt;

[0013] Where RPM_CRS is the engine speed, V is the real-time vehicle speed, Gr is the transmission ratio of the current gear, FDR is the main reduction ratio, and Rt is the tire rolling radius.

[0014] S102, obtaining the current maximum driving torque of the engine according to the engine speed;

[0015] S103: Calculate the current maximum driving power of the engine according to the maximum driving torque of the engine.

[0016] In a possible implementation of the first aspect, the S200 further includes:

[0017] S201, obtain the peak discharge power P of the target vehicle battery pack 放电 To calculate the first energy supply power P G1 ,in:

[0018] P G1 =P 放电 *η1*η2,

[0019] Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system;

[0020] 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 ;

[0021] 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;

[0022] 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.

[0023] In a possible implementation of the first aspect, the S300 includes:

[0024] S301, obtain 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 real-time speed;

[0025] S302, based on the current peak discharge power P of the generator E And the battery pack peak discharge power P 放电 To calculate the second energy supply power P G2 ,

[0026] P G2 =(P 放电 +PE )*η1*η2,

[0027] Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system;

[0028] S303: Obtain the maximum power of each drive motor in the drive unit to calculate the maximum output power P of the drive unit. Qmax ;

[0029] 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.

[0030] In a possible implementation of the first aspect, the S400 includes:

[0031] S401, determining whether the first driving power P1 is less than the second driving power P2;

[0032] 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;

[0033] If not, the power system switches the driving mode to the parallel mode, and controls the engine to output the target electric driving power.

[0034] 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 status of the battery, and the battery pack discharge duration are obtained to query the peak discharge power P of the battery pack. 放电 .

[0035] In a possible implementation of the first aspect, the step 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 .

[0036] In a possible implementation 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.

[0037] According to an embodiment of the present invention, a power system control method can switch to the corresponding operating mode under full-throttle acceleration conditions based on a comparison of the maximum drive power of each power unit (including the energy supply unit and the drive unit) in series mode and the maximum drive power of each power unit in parallel mode, thereby ensuring the power system operates at its optimal power (dynamic) state. This power system control method, under full-throttle acceleration conditions, utilizes power arbitration between different drive modes to fully utilize the drive system's maximum driving capability, avoiding power waste caused by insufficient power utilization by the drive subsystems and significantly improving the driver experience. Furthermore, this power system control method avoids the drawback of switching modes based on a single boundary condition, which fails to address the needs of various scenarios.

[0038] According to a second aspect of an embodiment of the present invention, a power control system under full throttle acceleration conditions includes:

[0039] 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;

[0040] a first calculation module, calculating a first driving power of the power system according to the current maximum driving power of the engine;

[0041] A second calculation module obtains basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system;

[0042] 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.

[0043] According to a third aspect of an embodiment of the present invention, a vehicle is provided, 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.

[0044] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0046] Figure 1is a flow chart of a control method for a power system according to an embodiment of the present invention;

[0047] 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;

[0048] Figure 3 4 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

[0049] 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.

[0050] 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 referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] In the specification, claims, and accompanying drawings of this application, the terms "first," "second," "third," and the like are used to distinguish different objects and are not used to describe a particular order. Furthermore, the terms "including," "comprising," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a list of steps or elements may be included, or alternatively, steps or elements not listed may be included, or other steps or elements may be included that are inherent to the process, method, product, or apparatus.

[0053] Only portions relevant to the present application are shown in the accompanying drawings, not all of them. Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations (or steps) as sequential processes, many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0054] As used in this specification, the terms "component," "module," "system," "unit," and the like are used to refer to 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, for example, via local and / or remote processes 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, such as the Internet, which interacts with other systems via signals).

[0055] Example 1

[0056] See 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, and the drive unit includes a first drive motor and a second drive motor. The method is applicable to full throttle acceleration conditions and includes:

[0057] S100, obtaining the real-time speed and gear position of the target vehicle to calculate the current maximum driving power of the engine, said S100 includes:

[0058] S101, obtaining the real-time speed and gear position of the target vehicle to calculate the engine speed:

[0059] RPM_CRS=V*Gr*FDR / 0.377 / Rt;

[0060] Where RPM_CRS is the engine speed (rad / s), V is the real-time vehicle speed (km / h), Gr is the transmission ratio in the current gear, FDR is the final reduction ratio, and Rt is the tire rolling radius (m). The transmission ratio Gr and final reduction ratio FDR in the current gear, as well as the tire rolling radius Rt, can be directly extracted from the basic information of the target vehicle or provided directly by the manufacturer.

[0061] S102, obtaining the maximum driving torque of the current engine according to the engine speed, specifically including looking up a table based on the calculated engine speed in combination 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 stand 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.

[0062] S103, calculating the current maximum driving power of the engine based on 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:

[0063] P = T × ω;

[0064] Where ω represents the current engine angular velocity, ω = (current engine speed at maximum torque × 2 × π) / 60, which can more accurately calculate the current maximum driving power of the engine.

[0065] S200, calculating a first driving power P1 of a power system according to the current maximum driving power of the engine;

[0066] 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. S300 includes:

[0067] S301, obtain 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 real-time speed;

[0068] S302, based on the current peak discharge power P of the generator E And the battery pack peak discharge power P 放电 To calculate the second energy supply power P G2 ,

[0069] P G2 =(P 放电 +P E )*η1*η2,

[0070] Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system;

[0071] S303: Obtain the maximum power of each drive motor in the drive unit to calculate the maximum output power P of the drive unit. Qmax ;

[0072] 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;

[0073] 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, said S400 including:

[0074] S401, determining whether the first driving power P1 is less than the second driving power P2;

[0075] 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;

[0076] If not, the power system switches the driving mode to the parallel mode, and controls the engine to output the target electric driving power.

[0077] It should be noted that the S200 also includes:

[0078] S201, obtain the peak discharge power P of the target vehicle battery pack 放电 To calculate the first energy supply power P G1 ,in:

[0079] P G1 =P 放电 *η1*η2,

[0080] Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system;

[0081] 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.

[0082] 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, taking the front and rear motors as an example,

[0083] P Qmax =P D1 *η3+P D2 *η4;

[0084] Where, PD1 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.

[0085] 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;

[0086] S204 , calculating a first driving power P1 of the power system according to the current maximum driving power of the engine and the first electric driving power, where P1 = first electric driving power + current maximum driving power of the engine * transmission efficiency, where the transmission efficiency is provided by the supplier.

[0087] It should be noted that the driving mode includes a series mode and a parallel mode.

[0088] In series mode, the power system is configured with a second driving power P2;

[0089] In the parallel mode, the power system is configured with a first driving power P1.

[0090] 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 status of the battery, and the battery pack discharge duration are obtained to query the peak discharge power P of the battery pack. 放电 .

[0091] 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 The data sheet can be provided by the supplier or obtained through bench testing. The testing process is a conventional method in this industry and will not be described in detail here.

[0092] 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 , specifically including:

[0093] S3011, obtaining the current engine temperature, engine transmission efficiency, and generator power generation efficiency of the target vehicle, and obtaining the maximum series discharge power of the engine based on the current engine temperature;

[0094] 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:

[0095] The first discharge power P E1 = Maximum discharge power of engine in series * engine transmission efficiency * generator power generation efficiency,

[0096] 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.

[0097] S3013, obtaining the current speed, current voltage, and current temperature of the target vehicle's engine to query the maximum power generation and power generation efficiency of the generator;

[0098] 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:

[0099] The second discharge power P E1 = Maximum power generation of generator * generator power generation efficiency;

[0100] 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 .

[0101] It should be noted that the process also includes obtaining the accelerator pedal opening to determine whether the target vehicle is in a full throttle acceleration state. Specifically, it includes:

[0102] Get the accelerator pedal opening of the target vehicle;

[0103] Determining whether the accelerator pedal opening exceeds a first preset threshold;

[0104] 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.

[0105] 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.

[0106] 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 pedal displacement. The accelerator pedal position sensor is preferably a Hall effect sensor that can sense pedal displacement and convert it into an electrical signal. This electrical signal is transmitted to the target vehicle's electronic control unit, which uses this signal to determine the accelerator pedal opening.

[0107] According to an embodiment of the present invention, a power system control method can switch to the corresponding operating mode under full-throttle acceleration conditions based on a comparison of the maximum drive power of each power unit (including the energy supply unit and the drive unit) in series mode and the maximum drive power of each power unit in parallel mode, thereby ensuring the power system operates at its optimal power (dynamic) state. This power system control method, under full-throttle acceleration conditions, utilizes power arbitration between different drive modes to fully utilize the drive system's maximum driving capability, avoiding power waste caused by insufficient power utilization by the drive subsystems and significantly improving the driver experience. Furthermore, this power system control method avoids the drawback of switching modes based on a single boundary condition, which fails to address the needs of various scenarios.

[0108] This 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 results were as follows:

[0109] (1) During full-throttle acceleration with increasing speed, a vehicle not employing the technical solution of the present invention (hereinafter referred to as the comparative vehicle) switches its powertrain to parallel mode after reaching 60 km / h. During this period, between 60 km / h and 120 km / h, the powertrain's power units in series mode are unable to fully utilize their superior driving power compared to parallel mode. Specifically, the acceleration time from 60 km / h to 100 km / h is approximately 1 second slower than that of a vehicle employing the technical solution of this embodiment, resulting in a 25% decrease in dynamic performance (acceleration). The acceleration time from 80 km / h to 120 km / h is approximately 1.5 seconds slower than that of a vehicle employing the technical solution of this embodiment, resulting in a 30% decrease in dynamic performance (acceleration).

[0110] (2) When in a 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 speeds due to the lack of power arbitration. The maximum speed is limited by the discharge capacity of the generator at high temperatures. The generator has poor performance in high temperature environments, resulting in a maximum speed of only 110 km / h. However, a vehicle that adopts the technical solution of the present invention will perform power arbitration at high speeds, switching the drive mode to parallel mode, which can take advantage of the engine's direct drive power and achieve a maximum speed of 145 km / h.

[0111] Through actual measurement and analysis, it can be seen that the present invention fully utilizes the maximum driving capacity of the drive system by adopting a power arbitration method under different driving modes for the full-throttle acceleration condition, avoiding the power waste caused by insufficient power application of the drive subsystem, and greatly improving the driver experience.

[0112] Example 2

[0113] This embodiment provides a power control system under full throttle acceleration conditions, which includes:

[0114] 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;

[0115] a first calculation module, calculating a first driving power of the power system according to the current maximum driving power of the engine;

[0116] A second calculation module obtains basic information of the target vehicle and peak discharge efficiency of the battery pack to calculate a second driving power of the power system;

[0117] 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.

[0118] It should be noted that the power system includes an energy supply unit and a drive unit. The energy 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.

[0119] In an embodiment of the present application, a power control system under full-throttle acceleration conditions may be a device, or a component, integrated circuit, or chip within a terminal. The device may be a mobile electronic device or a non-mobile electronic device. For example, the mobile electronic device may be a mobile phone, tablet computer, laptop computer, PDA, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), while the non-mobile electronic device may be a server, network attached storage (NAS), personal computer (PC), etc., without specific limitations in the present embodiment.

[0120] In an 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 present embodiment.

[0121] The power control system provided in the embodiment of the present application under full throttle acceleration conditions can achieve Figure 1 The various processes of implementing the power control under full throttle acceleration conditions in the method embodiment will not be described here in detail to avoid repetition.

[0122] According to a power control system under full throttle acceleration conditions of this 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, the corresponding operating mode can be switched to ensure that the power system operates in the optimal power (power) state. According to the power system of the embodiment of the present invention, under full throttle acceleration conditions, the power arbitration method under different driving modes is adopted to fully utilize the maximum driving capacity of the drive system, avoid the waste of power due to insufficient power application of the drive subsystem, and greatly improve 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.

[0123] 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, the various processes of the power control embodiment under the above-mentioned full throttle acceleration condition are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0124] 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, the various processes of the power control embodiment under the above-mentioned full throttle acceleration condition are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0125] 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), random access memory (RAM), a magnetic disk, or an optical disk.

[0126] Example 3

[0127] 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.

[0128] In the description of the present invention, it should 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 operate in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0129] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0130] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of 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 does not necessarily mean that they are all the same embodiments, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It can be understood explicitly and implicitly 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 those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0131] While 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 invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A method for controlling a power system, characterized in that: The power system includes an energy supply unit and a drive unit. The energy supply unit includes a generator and a battery pack. The method is applicable to full throttle acceleration conditions and includes: 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 P1 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 P2 of the power system, wherein 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 battery pack peak discharge power P 放电 To calculate the second energy supply power P G2 , ， Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; S303: Obtain the maximum power of each drive motor in the drive unit to calculate the maximum output power P of the drive 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 P1 and the second driving power P2 to control the engine to output a target electric driving power, said 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; If not, the power system switches the driving mode to the parallel mode, and controls the engine to output the target electric driving power.

2. The power system control method 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: ； Where RPM_CRS is the engine speed, V is the real-time vehicle speed, Gr is the transmission ratio of the current gear, FDR is the main reduction ratio, and Rt is the tire rolling radius. S102, obtaining the current maximum driving torque of the 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, obtain the peak discharge power P of the target vehicle battery pack 放电 To calculate the first energy supply power P G1 ,in: ， 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 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 battery pack discharge duration to query the battery pack peak discharge power Pdischarge.

5. The control method of the power system according to claim 1, characterized in that: The step 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.

6. The method for controlling a power system according to claim 4, wherein: The method also includes obtaining an accelerator pedal opening to determine whether the target vehicle is in a full throttle acceleration condition.

7. 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, calculating a first driving power P1 of the power system according to the current maximum driving power of the engine; The second calculation module obtains basic information of the target vehicle and the peak discharge efficiency of the battery pack to calculate the second driving power P2 of the power system, including: Obtain the 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; According to the current peak discharge power P of the generator E And the battery pack peak discharge power P 放电 To calculate the second energy supply power P G2 , ， Among them, η1 is the electronic control efficiency of the drive motor, and η2 is the efficiency of the transmission system; Obtain the maximum power of each drive motor in the drive unit to calculate the maximum output power P of the drive unit Qmax ; 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; The control module switches the driving mode of the power system in real time according to the first driving power P1 and the second driving power P2 to control the engine to output the target electric driving power, including: determining whether the first driving power P1 is less than the second driving power P2; If so, 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; 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.

8. A vehicle, characterized in that: The vehicle is equipped with a power control system, and the control system is used to execute the power system control method according to any one of claims 1 to 6.

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