A method and system for controlling power response of a range extender

Abstract

The present application relates to the technical field of electric vehicle control, especially to a range extender power response control method and system. The vehicle controller obtains vehicle driving information, determines whether the range extender meets the starting condition according to the vehicle driving information, and the range extender receives the power generation request of the vehicle controller. According to the requested power generation, a first judgment process is performed, different response control strategies are selected based on the results of the first judgment process, and the power generation process is performed based on the response control strategy. The present application determines whether the range extender meets the starting condition by obtaining the vehicle driving information, and performs different response control strategies based on the different power generation efficiency received by the range extender, which is not limited to a single mode. Not only can the fuel consumption be optimized, but also the emissions can be improved. In practical application, appropriate modes can be selected according to specific needs and scenarios to optimize overall efficiency and performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle control, in particular to a range extender power response control method and system. BACKGROUND

[0002] The range extender vehicle is a plug-in series hybrid electric vehicle that is purely electrically driven. Its power system mainly consists of four parts: power battery system, power drive system, range extender and vehicle control system. When the on-board rechargeable energy storage system cannot meet the requirement of the cruising range, the range extender will start and provide power for the power system, thereby extending the cruising range of the vehicle.

[0003] The range extender generally refers to the combination of an engine and a generator. It can convert external energy (such as gasoline, natural gas, etc.) into electricity when the main power source (such as the power battery) of the electric vehicle is insufficient, providing additional power support for the electric vehicle. This design enables the electric vehicle to continue driving after the battery runs out, thereby extending the cruising range of the vehicle.

[0004] In the prior art, the control logic of the range extender vehicle is that when the vehicle controller requests power from the range extender, the generator module of the range extender can only choose one of the two, resulting in high fuel consumption and poor emissions of the vehicle SUMMARY

[0005] The present application aims to at least improve one of the technical problems existing in the prior art. To this end, the present application proposes a range extender power response control method and system.

[0006] According to the range extender power response control method according to the first aspect of the present application, the method comprises the following steps:

[0007] The vehicle controller obtains vehicle driving information, which includes vehicle driving conditions and the remaining capacity of the battery pack;

[0008] According to the vehicle driving information, it is determined whether the range extender meets the starting condition,

[0009] If yes, the range extender receives the power generation request of the vehicle controller;

[0010] According to the requested power generation, a first judgment process is performed, and different response control strategies are selected based on the results of the first judgment process;

[0011] Based on the response control strategy, the power generation process is performed.

[0012] The power response control method of the range extender according to the embodiment of the application determines whether the range extender meets the starting condition through the obtained vehicle driving information, and performs different response control strategies based on different power generation efficiencies received by the range extender, which is not limited to a single mode, and can not only optimize fuel consumption, but also improve emissions. In actual application, appropriate modes can be selected according to specific requirements and scenes to optimize overall efficiency and performance.

[0013] In a possible implementation of the first aspect, the first determining process includes power determination based on the received power generation, and confirmation of the working mode corresponding to the power for matching different response strategies.

[0014] In a possible implementation of the first aspect, before determining whether the range extender meets the starting condition, the corresponding relationship between the engine speed and the power is preset in the vehicle controller, the power of the range extender is converted into the speed and the torque according to the corresponding relationship, and the power generation is performed after the response control strategy is selected.

[0015] In a possible implementation of the first aspect, before determining whether the range extender meets the starting condition, the following steps are further included:

[0016] The first power interval range and the second power interval range are defined in the vehicle controller in advance, the first power interval range is associated with the first working mode, and the second power interval range is associated with the second working mode, and the first power interval range x satisfies 20kw≤x≤50kw, and the second power interval range y satisfies y<20kw or y>50kw.

[0017] The first power interval range x satisfies: 20kw≤x≤50kw;

[0018] The second power interval range y satisfies: y<20kw or y>50kw.

[0019] In a possible implementation of the first aspect, the range extender meets the starting condition by satisfying at least one of the following conditions:

[0020] Condition one: the remaining power of the vehicle battery pack decreases to a first preset threshold, in the embodiment, the first preset threshold is ≤30%, and the range extender is activated to prevent the electric vehicle from being forced to be towed due to power consumption;

[0021] Condition two: the remaining power of the vehicle battery pack reaches a second preset threshold, in the embodiment, the second preset threshold is between 70% and 76%, and the range extender is activated to reserve more power to adapt to subsequent possible high-speed driving or high-energy consumption requirements.

[0022] Condition 3: When the vehicle is in urban congestion, it should be noted that in this embodiment, if the vehicle is frequently in a low-speed driving or frequent start-stop state, it is determined that the vehicle is in urban congestion. At this time, the range extender can start when the battery charge drops to a low level to utilize battery power and reduce energy consumption.

[0023] Condition 4: When the vehicle is in a high-speed driving condition, the criteria for determining whether the vehicle is in a high-speed driving condition is whether the vehicle speed exceeds 120 km / h. In order to maintain the battery charge and reduce the number of charging times, the range extender can start when the battery charge is relatively high.

[0024] In one possible implementation of the first aspect, the response control strategy includes a power-following response strategy and a point-selective response strategy, wherein

[0025] When the range extender switches to the first working mode, it executes a power follow-response strategy, which adjusts the output power of the range extender according to the actual power demand of the vehicle to ensure that the vehicle can operate stably. This method can ensure that the range extender always works at the operating point that meets the vehicle's needs and has good fuel economy, thereby avoiding multi-stage energy conversion and unnecessary energy loss.

[0026] When the range extender switches to the second operating mode, it executes a point-selection response strategy. Specifically, it selects multiple output power points within a pre-selected high-efficiency operating area and determines the output power point of the range extender based on the vehicle's driving conditions and the driver's driving intentions. This method ensures that the range extender always operates in the high-efficiency zone, thereby improving energy utilization efficiency.

[0027] According to a second aspect of the present invention, a range extender power response control system is provided, wherein the system for performing the method described above to respond to control the power of the range extender includes a vehicle controller and a range extender, wherein...

[0028] The vehicle controller is used to acquire vehicle driving information, which includes the vehicle driving status and the remaining power of the battery pack.

[0029] Determine whether the range extender meets the start-up conditions based on the vehicle's driving information.

[0030] If so, send a power generation request;

[0031] The range extender is used to receive power generation requests;

[0032] The first judgment process is performed based on the requested power generation capacity, and different response control strategies are selected based on the result of the first judgment process.

[0033] The power generation process is executed based on the aforementioned response control strategy.

[0034] A computer device according to a third aspect of the present invention includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the range extender power response control method as described above.

[0035] According to a fourth aspect of the present invention, a computer storage medium stores instructions that, when executed on a computer, cause the computer to perform the range extender power response control method as described above.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of a range extender power response control method according to an embodiment of the present invention. Detailed Implementation

[0039] 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 merely illustrative of this application and are not intended to limit this application.

[0040] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, it may include a series of steps or units, or optionally, steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0043] The accompanying drawings show only the portions relevant to this application, not all of them. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations may be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0044] The terms “component,” “module,” “system,” “unit,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations 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, a thread of execution, a program, and / or distributed between two or more computers. Furthermore, these units can be executed from various computer-readable media on which various data structures are stored. 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 between a local system, a distributed system, and / or a network; for example, the Internet interacting with other systems via signals).

[0045] Example 1

[0046] See Figure 1 As shown, this embodiment provides a power response control method for a range extender, which includes:

[0047] Step S1: The vehicle controller acquires vehicle driving information, which includes the vehicle driving status and the remaining battery power.

[0048] Step S2: Determine whether the range extender meets the start-up conditions based on the vehicle driving information.

[0049] Step S3: If yes, the range extender receives the power generation request from the vehicle controller.

[0050] Step S4: Perform a first judgment process based on the requested power generation, and select different response control strategies based on the result of the first judgment process;

[0051] Step S5: Execute the power generation process based on the response control strategy.

[0052] The range extender power response control method according to embodiments of the present invention determines whether the range extender meets the start-up conditions by acquiring vehicle driving information. Based on the different power generation efficiencies received by the range extender, different response control strategies are implemented, rather than being limited to a single mode. This not only optimizes fuel consumption but also improves emissions. In practical applications, an appropriate mode can be selected according to specific needs and scenarios to optimize overall efficiency and performance.

[0053] It should be noted that the vehicle controller can request power from the range extender based on factors such as the vehicle's driving status, the battery's charge level, and the driver's driving needs.

[0054] It should be noted that the first judgment process includes performing a power judgment based on the received power generation, confirming the working mode corresponding to the power, and matching different response strategies.

[0055] It should be noted that before determining whether the range extender meets the start-up conditions, the correspondence between engine speed and power is pre-set in the vehicle controller. Based on the correspondence, the power of the range extender is converted into speed and torque for power generation after the response control strategy is selected.

[0056] It should be noted that, before determining whether the range extender meets the startup conditions, the following steps are also included:

[0057] A first power range and a second power range are predefined in the vehicle controller. The first power range is associated with a first operating mode, and the second power range is associated with a second operating mode, wherein:

[0058] The first power range x satisfies: 20kW≤x≤50kW;

[0059] The second power range y satisfies: y < 20 kW or y > 50 kW.

[0060] It should be noted that the range extender must meet at least one of the following conditions to be eligible for startup:

[0061] Condition 1: When the remaining charge of the vehicle battery pack drops to a first preset threshold, in this embodiment, the first preset threshold is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to be towed due to power depletion.

[0062] Condition 2: When the remaining charge of the vehicle battery pack reaches the second preset threshold, in this embodiment, the second preset threshold is between 70% and 76%, the range extender will be activated to retain more charge to meet the subsequent possible high-speed driving or high energy consumption needs.

[0063] Condition 3: When the vehicle is in urban congestion, it should be noted that in this embodiment, if the vehicle is frequently in a low-speed driving or frequent start-stop state, it is determined that the vehicle is in urban congestion. At this time, the range extender can start when the battery charge drops to a low level to utilize battery power and reduce energy consumption.

[0064] Condition 4: When the vehicle is in a high-speed driving condition, the criteria for determining whether the vehicle is in a high-speed driving condition is whether the vehicle speed exceeds 120 km / h. In order to maintain the battery charge and reduce the number of charging times, the range extender can start when the battery charge is relatively high.

[0065] It should be noted that the response control strategy includes a power-following response strategy and a point-selective response strategy, wherein...

[0066] When the range extender switches to the first working mode, it executes a power follow-response strategy, which adjusts the output power of the range extender according to the actual power demand of the vehicle to ensure that the vehicle can operate stably. This method can ensure that the range extender always works at the operating point that meets the vehicle's needs and has good fuel economy, thereby avoiding multi-stage energy conversion and unnecessary energy loss.

[0067] When the range extender switches to the second operating mode, it executes a point-selection response strategy. Specifically, it selects multiple output power points within a pre-selected high-efficiency operating area and determines the output power point of the range extender based on the vehicle's driving conditions and the driver's driving intentions. This method ensures that the range extender always operates in the high-efficiency zone, thereby improving energy utilization efficiency.

[0068] It should be noted that in this embodiment, the power following response strategy is implemented using the five-point method. Specifically, by finding five suitable operating points and selecting the closest operating point as the operating point of the engine and electric motor based on the actual power demand of the vehicle, multi-stage energy transfer can be avoided and the overall vehicle efficiency can be improved.

[0069] Example 2

[0070] This embodiment provides a range extender power response control system, wherein the system, used to perform the method described above to respond and control the power of the range extender, includes a vehicle controller and a range extender.

[0071] The vehicle controller is used to acquire vehicle driving information, which includes the vehicle driving status and the remaining power of the battery pack.

[0072] Determine whether the range extender meets the start-up conditions based on the vehicle's driving information.

[0073] If so, send a power generation request;

[0074] The range extender is used to receive power generation requests;

[0075] The first judgment process is performed based on the requested power generation capacity, and different response control strategies are selected based on the result of the first judgment process.

[0076] The power generation process is executed based on the aforementioned response control strategy.

[0077] The range extender power response control system according to embodiments of the present invention determines whether the range extender meets the start-up conditions by obtaining vehicle driving information from the vehicle controller. Based on the different power generation efficiencies received by the range extender, different response control strategies are implemented, rather than being limited to a single mode. This not only optimizes fuel consumption but also improves emissions. In practical applications, an appropriate mode can be selected according to specific needs and scenarios to optimize overall efficiency and performance.

[0078] It should be noted that the vehicle controller can request power from the range extender based on factors such as the vehicle's driving status, the battery's charge level, and the driver's driving needs.

[0079] It should be noted that the first judgment process includes performing a power judgment based on the received power generation, confirming the working mode corresponding to the power, and matching different response strategies.

[0080] It should be noted that before determining whether the range extender meets the start-up conditions, the correspondence between engine speed and power is pre-set in the vehicle controller. Based on the correspondence, the power of the range extender is converted into speed and torque for power generation after the response control strategy is selected.

[0081] It should be noted that, before determining whether the range extender meets the startup conditions, the following steps are also included:

[0082] A first power range and a second power range are predefined in the vehicle controller. The first power range is associated with a first operating mode, and the second power range is associated with a second operating mode, wherein:

[0083] The first power range x satisfies: 20kW≤x≤50kW;

[0084] The second power range y satisfies: y < 20 kW or y > 50 kW.

[0085] It should be noted that the range extender must meet at least one of the following conditions to be eligible for startup:

[0086] Condition 1: When the remaining charge of the vehicle battery pack drops to a first preset threshold, in this embodiment, the first preset threshold is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to be towed due to power depletion.

[0087] Condition 2: When the remaining charge of the vehicle battery pack reaches the second preset threshold, in this embodiment, the second preset threshold is between 70% and 76%, the range extender will be activated to retain more charge to meet the subsequent possible high-speed driving or high energy consumption needs.

[0088] Condition 3: When the vehicle is in urban congestion, it should be noted that in this embodiment, if the vehicle is frequently in a low-speed driving or frequent start-stop state, it is determined that the vehicle is in urban congestion. At this time, the range extender can start when the battery charge drops to a low level to utilize battery power and reduce energy consumption.

[0089] Condition 4: When the vehicle is in a high-speed driving condition, the criteria for determining whether the vehicle is in a high-speed driving condition is whether the vehicle speed exceeds 120 km / h. In order to maintain the battery charge and reduce the number of charging times, the range extender can start when the battery charge is relatively high.

[0090] It should be noted that the response control strategy includes a power-following response strategy and a point-selective response strategy, wherein...

[0091] When the range extender switches to the first working mode, it executes a power follow-response strategy, which adjusts the output power of the range extender according to the actual power demand of the vehicle to ensure that the vehicle can operate stably. This method can ensure that the range extender always works at the operating point that meets the vehicle's needs and has good fuel economy, thereby avoiding multi-stage energy conversion and unnecessary energy loss.

[0092] When the range extender switches to the second operating mode, it executes a point-selection response strategy. Specifically, it selects multiple output power points within a pre-selected high-efficiency operating area and determines the output power point of the range extender based on the vehicle's driving conditions and the driver's driving intentions. This method ensures that the range extender always operates in the high-efficiency zone, thereby improving energy utilization efficiency.

[0093] Example 3

[0094] This embodiment provides a computer device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the range extender power response control method as described above.

[0095] Example 4

[0096] This embodiment provides a computer storage medium, wherein the computer storage medium stores instructions, and when the instructions are executed on a computer, the computer performs the range extender power response control method as described above.

[0097] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0098] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0099] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0100] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A power response control method for a range extender, characterized in that, include: The vehicle controller acquires vehicle driving information, which includes the vehicle driving status and the remaining battery power. The range extender is determined to have met the start-up conditions based on the vehicle's driving information. The determination that the range extender has met the start-up conditions requires at least one of the following conditions to be satisfied: Condition 1: When the remaining charge of the vehicle battery pack drops to a first preset threshold, in this embodiment, the first preset threshold is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to be towed due to power depletion. Condition 2: When the remaining charge of the vehicle battery pack reaches the second preset threshold, in this embodiment, the second preset threshold is between 70% and 76%, the range extender will be activated to retain more charge to meet the subsequent possible high-speed driving or high energy consumption needs. Condition 3: When the vehicle is in urban congestion, it should be noted that in this embodiment, if the vehicle is frequently in a low-speed driving or frequent start-stop state, it is determined that the vehicle is in urban congestion. At this time, the range extender can start when the battery charge drops to a low level to utilize battery power and reduce energy consumption. Condition 4: When the vehicle is in a high-speed driving condition, the basis for determining whether the vehicle is in a high-speed driving condition is whether the vehicle speed exceeds 120 km / h. In order to maintain the battery power and reduce the number of charging times, the range extender can start when the battery power is relatively high. If so, the range extender receives the power generation request from the vehicle controller; The first judgment process is performed based on the requested power generation capacity, and different response control strategies are selected based on the result of the first judgment process. The power generation process is executed based on the aforementioned response control strategy, which includes a power following response strategy and a point selection response strategy, wherein... When the range extender switches to the first operating mode, it executes a power follow-response strategy, adjusting the output power of the range extender according to the actual power demand of the vehicle. When the range extender switches to the second operating mode, it executes a point selection response strategy, which involves selecting multiple output power points within a pre-selected high-efficiency operating area and determining the output power point of the range extender based on the vehicle's driving conditions and the driver's driving intentions.

2. The range extender power response control method according to claim 1, characterized in that, The first determination process includes determining the power based on the received power generation and confirming the operating mode corresponding to that power.

3. The range extender power response control method according to claim 1, characterized in that, Before determining whether the range extender meets the start-up conditions, the correspondence between engine speed and power is pre-set in the vehicle controller. Based on the correspondence, the power of the range extender is converted into speed and torque for power generation after the response control strategy is selected.

4. The range extender power response control method according to claim 1, characterized in that, in, Before determining whether the range extender meets the startup conditions, the process also includes: A first power range and a second power range are predefined in the vehicle controller. The first power range is associated with a first operating mode, and the second power range is associated with a second operating mode.

5. The range extender power response control method according to claim 4, characterized in that, The first power range x satisfies: 20kW≤x≤50kW; The second power range y satisfies: y < 20 kW or y > 50 kW.

6. A range extender power response control system, characterized in that, A vehicle controller and a range extender are included for performing responsive control of the range extender power as described in any one of claims 1 to 5, wherein... The vehicle controller is used to acquire vehicle driving information, which includes the vehicle driving status and the remaining power of the battery pack. The range extender is determined to have met the start-up conditions based on the vehicle's driving information. The determination that the range extender has met the start-up conditions requires at least one of the following conditions to be satisfied: Condition 1: When the remaining charge of the vehicle battery pack drops to a first preset threshold, in this embodiment, the first preset threshold is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to be towed due to power depletion. Condition 2: When the remaining charge of the vehicle battery pack reaches the second preset threshold, in this embodiment, the second preset threshold is between 70% and 76%, the range extender will be activated to retain more charge to meet the subsequent possible high-speed driving or high energy consumption needs. Condition 3: When the vehicle is in urban congestion, it should be noted that in this embodiment, if the vehicle is frequently in a low-speed driving or frequent start-stop state, it is determined that the vehicle is in urban congestion. At this time, the range extender can start when the battery charge drops to a low level to utilize battery power and reduce energy consumption. Condition 4: When the vehicle is in a high-speed driving condition, the basis for determining whether the vehicle is in a high-speed driving condition is whether the vehicle speed exceeds 120 km / h. In order to maintain the battery power and reduce the number of charging times, the range extender can start when the battery power is relatively high. If so, send a power generation request; The range extender is used to receive power generation requests; The first judgment process is performed based on the requested power generation capacity, and different response control strategies are selected based on the result of the first judgment process. The power generation process is executed based on the aforementioned response control strategy, which includes a power following response strategy and a point selection response strategy, wherein... When the range extender switches to the first operating mode, it executes a power follow-response strategy, adjusting the output power of the range extender according to the actual power demand of the vehicle. When the range extender switches to the second operating mode, it executes a point selection response strategy, which involves selecting multiple output power points within a pre-selected high-efficiency operating area and determining the output power point of the range extender based on the vehicle's driving conditions and the driver's driving intentions.

7. A computer device, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the range extender power response control method as described in any one of claims 1 to 5.

8. A computer storage medium, characterized in that, The computer storage medium stores instructions that, when executed on the computer, cause the computer to perform the range extender power response control method as described in any one of claims 1 to 5.

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