Range extender power response control method and system

Abstract

The invention relates to the technical field of electric vehicle control, in particular to a range extender power response control method and system. Comprising the steps that a whole vehicle controller obtains whole vehicle driving information, whether a range extender meets a starting condition or not is judged according to the whole vehicle driving information, and the range extender receives a power generation power request of the whole vehicle controller; executing a first judgment process according to the requested generation power, and selecting different response control strategies based on the result of the first judgment process; and executing a power generation process based on the response control strategy. Whether the range extender reaches the starting condition or not is judged according to the obtained whole vehicle driving information, different response control strategies are carried out based on different power generation efficiencies received by the range extender, the control strategies are not limited to a single mode, oil consumption can be optimized, and emission can be improved. In practical application, a proper mode can be selected according to specific requirements and scenes so as to optimize the overall efficiency and performance.

Description

Technical Field

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

[0002] The range-extended vehicle is a plug-in series hybrid vehicle that is driven by pure electric power. 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 range requirements, the range extender will start and provide power to the power system, thereby extending the vehicle's range.

[0003] A range extender generally refers to a combination of an engine and a generator, which can provide additional power support for electric vehicles by converting 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. This design allows electric vehicles to continue driving after the battery is exhausted, thereby extending the vehicle's range.

[0004] In the prior art, the control logic of the range extender is that when the vehicle controller makes a power request to the range extender, the range extender's power generation module can only choose one of the two, resulting in high fuel consumption and poor emissions. Summary of the invention 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 range extender power response control method and system.

[0005] A range extender power response control method according to an embodiment of the first aspect of the present invention includes: The vehicle controller obtains vehicle driving information, wherein the vehicle driving information includes the vehicle driving condition and the remaining power of the battery pack; Determine whether the range extender meets the start-up conditions based on the vehicle driving information, If yes, the range extender receives the power generation request from the vehicle controller; executing a first determination process according to the requested generated power, and selecting different response control strategies based on the result of the first determination process; A power generation process is performed based on the responsive control strategy.

[0006] According to the range extender power response control method of the embodiment of the present invention, the range extender is judged whether the start-up condition is met by obtaining the whole vehicle driving information, and different response control strategies are performed based on the different power generation efficiencies received by the range extender, rather than being limited to a single mode, which can not only optimize fuel consumption but also improve emissions. In practical applications, the appropriate mode can be selected according to specific needs and scenarios to optimize overall efficiency and performance.

[0007] In a possible implementation manner of the first aspect, the first judgment process includes performing a power judgment based on the received generated power, and confirming a working mode corresponding to the power for matching different response strategies.

[0008] In a possible implementation of the first aspect, before determining whether the range extender meets the start-up conditions, a correspondence between the engine speed and the power is pre-set in the vehicle controller, and according to the correspondence, the power of the range extender is converted into a speed and a torque for power generation after selecting a response control strategy.

[0009] In a possible implementation manner of the first aspect, before determining whether the range extender meets the start-up condition, the method further includes: A first power range and a second power range are pre-defined in the vehicle controller, the first power range is associated with the first working mode, and the second power range is associated with the second working mode, wherein: The first power range x satisfies: 20kw≤x≤50kw; The second power interval range y satisfies: y<20kw or y>50kw.

[0010] In a possible implementation manner of the first aspect, the range extender meets the start-up condition only if at least one of the following conditions is satisfied: Condition 1: When the remaining power of the battery pack of the vehicle drops to a first preset threshold value, in this embodiment, the first preset threshold value is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to tow due to power exhaustion; Condition 2: When the remaining power of the battery pack of the vehicle reaches a second preset threshold value, in this embodiment, the second preset threshold value is between 70% and 76%, the range extender will be activated to reserve more power to meet the subsequent possible high-speed driving or high energy consumption requirements; Condition three: when the vehicle is in a congested urban road condition, it should be noted that, in this embodiment, if the vehicle is often in a low-speed driving or frequent start-stop state, it is judged that the vehicle is in a congested urban road condition at this time. At this time, the range extender can be started when the battery power drops to a lower level to use the battery to supply power and reduce energy consumption; Condition four: When the vehicle is in a high-speed driving condition, the basis for judging whether the vehicle is in a high-speed driving condition is whether the vehicle exceeds 120 kilometers per hour. In order to maintain the battery power and reduce the number of charging times, the range extender can be started when the battery power is relatively high.

[0011] In a possible implementation manner of the first aspect, the response control strategy includes a power following response strategy and a point selection response strategy, wherein When the range extender switches to the first working mode, the power following response strategy is executed to adjust the output power of the range extender according to the actual power demand of the vehicle to ensure that the vehicle can run stably. This method can ensure that the range extender always works at a working point that meets the vehicle's needs and has good fuel economy, thereby avoiding multi-stage energy conversion and unnecessary energy loss; When the range extender switches to the second working mode, the point selection response strategy is executed, specifically, multiple output power points are selected in the pre-selected high-efficiency working area, and the output power point of the range extender is determined according to the vehicle driving conditions and the driver's driving intention. This method can ensure that the range extender always operates in the high-efficiency area, thereby improving energy utilization efficiency.

[0012] According to a second aspect of the present invention, a range extender power response control system is used to execute the above method to respond to the range extender power, including a vehicle controller and a range extender, wherein The vehicle controller is used to obtain vehicle driving information, wherein the vehicle driving information includes the vehicle driving condition and the remaining power of the battery pack; Determine whether the range extender meets the start-up conditions based on the vehicle driving information, If yes, a power generation request is sent; The range extender is used to receive a request for generating power; executing a first determination process according to the requested generated power, and selecting different response control strategies based on the result of the first determination process; A power generation process is performed based on the responsive control strategy.

[0013] A computer device according to an embodiment of the third aspect of the present invention includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the range extender power response control method as described above is implemented.

[0014] According to a computer storage medium of an embodiment of the fourth aspect of the present invention, instructions are stored in the computer storage medium, and when the instructions are executed on a computer, the computer executes the range extender power response control method as described above.

[0015] 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

[0016] 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.

[0017] Figure 1 4 is a flow chart of a range extender power response control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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).

[0024] Example 1 See also Figure 1 As shown, this embodiment provides a range extender power response control method, which includes: Step S1, the vehicle controller obtains vehicle driving information, wherein the vehicle driving information includes the vehicle driving condition and the remaining power of the battery pack; Step S2, judging whether the range extender meets the start-up conditions according to the vehicle driving information, Step S3: If yes, the range extender receives the power generation request from the vehicle controller; Step S4, performing a first judgment process according to the requested power generation, and selecting different response control strategies based on the result of the first judgment process; Step S5, executing a power generation process based on the response control strategy.

[0025] According to the range extender power response control method of the embodiment of the present invention, the range extender is judged whether the start-up condition is met by obtaining the whole vehicle driving information, and different response control strategies are performed based on the different power generation efficiencies received by the range extender, rather than being limited to a single mode, which can not only optimize fuel consumption but also improve emissions. In practical applications, the appropriate mode can be selected according to specific needs and scenarios to optimize overall efficiency and performance.

[0026] It should be noted that the vehicle controller can make power requests to the range extender based on factors such as the vehicle's driving status, the power of the power battery, and the driver's driving needs.

[0027] It should be noted that the first judgment process includes performing power judgment based on the received generated power and confirming the working mode corresponding to the power for matching different response strategies.

[0028] It should be noted that before determining whether the range extender meets the start-up conditions, the correspondence between the engine speed and the power is pre-set in the vehicle controller, and according to the correspondence, the power of the range extender is converted into speed and torque for power generation after selecting the response control strategy.

[0029] It should be noted that, before determining whether the range extender meets the start-up conditions, the method further includes: A first power range and a second power range are pre-defined in the vehicle controller, the first power range is associated with the first working mode, and the second power range is associated with the second working mode, wherein: The first power range x satisfies: 20kw≤x≤50kw; The second power interval range y satisfies: y<20kw or y>50kw.

[0030] It should be noted that the range extender must meet at least one of the following conditions to meet the start-up conditions: Condition 1: When the remaining power of the battery pack of the vehicle drops to a first preset threshold value, in this embodiment, the first preset threshold value is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to tow due to power exhaustion; Condition 2: When the remaining power of the battery pack of the vehicle reaches a second preset threshold value, in this embodiment, the second preset threshold value is between 70% and 76%, the range extender will be activated to reserve more power to meet the subsequent possible high-speed driving or high energy consumption requirements; Condition three: when the vehicle is in a congested urban road condition, it should be noted that, in this embodiment, if the vehicle is often in a low-speed driving or frequent start-stop state, it is judged that the vehicle is in a congested urban road condition at this time. At this time, the range extender can be started when the battery power drops to a lower level to use the battery to supply power and reduce energy consumption; Condition four: When the vehicle is in a high-speed driving condition, the basis for judging whether the vehicle is in a high-speed driving condition is whether the vehicle exceeds 120 kilometers per hour. In order to maintain the battery power and reduce the number of charging times, the range extender can be started when the battery power is relatively high.

[0031] It should be noted that the response control strategy includes a power following response strategy and a point selection response strategy, wherein When the range extender switches to the first working mode, the power following response strategy is executed to adjust the output power of the range extender according to the actual power demand of the vehicle to ensure that the vehicle can run stably. This method can ensure that the range extender always works at a working point that meets the vehicle's needs and has good fuel economy, thereby avoiding multi-stage energy conversion and unnecessary energy loss; When the range extender switches to the second working mode, the point selection response strategy is executed, specifically, multiple output power points are selected in the pre-selected high-efficiency working area, and the output power point of the range extender is determined according to the vehicle driving conditions and the driver's driving intention. This method can ensure that the range extender always operates in the high-efficiency area, thereby improving energy utilization efficiency.

[0032] It should be noted that, in this embodiment, the power following response strategy is implemented using a five-point method, specifically by finding five suitable operating points and selecting the closest operating point as the operating point of the engine and the motor according to the actual power demand of the vehicle, thereby avoiding multi-stage energy transfer and improving the efficiency of the entire vehicle.

[0033] Example 2 This embodiment provides a range extender power response control system, which is used to execute the above method to respond to the range extender power control, including a vehicle controller and a range extender, wherein: The vehicle controller is used to obtain vehicle driving information, wherein the vehicle driving information includes the vehicle driving condition and the remaining power of the battery pack; Determine whether the range extender meets the start-up conditions based on the vehicle driving information, If yes, a power generation request is sent; The range extender is used to receive a request for generating power; executing a first determination process according to the requested generated power, and selecting different response control strategies based on the result of the first determination process; A power generation process is performed based on the responsive control strategy.

[0034] According to the range extender power response control system of the embodiment of the present invention, the vehicle driving information obtained by the vehicle controller determines whether the range extender has reached the start-up condition, and different response control strategies are implemented based on the different power generation efficiencies received by the range extender, rather than being limited to a single mode, which can not only optimize fuel consumption but also improve emissions. In practical applications, the appropriate mode can be selected according to specific needs and scenarios to optimize overall efficiency and performance.

[0035] It should be noted that the vehicle controller can make power requests to the range extender based on factors such as the vehicle's driving status, the power of the power battery, and the driver's driving needs.

[0036] It should be noted that the first judgment process includes performing power judgment based on the received generated power and confirming the working mode corresponding to the power for matching different response strategies.

[0037] It should be noted that before determining whether the range extender meets the start-up conditions, the correspondence between the engine speed and the power is pre-set in the vehicle controller, and according to the correspondence, the power of the range extender is converted into speed and torque for power generation after selecting the response control strategy.

[0038] It should be noted that, before determining whether the range extender meets the start-up conditions, the method further includes: A first power range and a second power range are pre-defined in the vehicle controller, the first power range is associated with the first working mode, and the second power range is associated with the second working mode, wherein: The first power range x satisfies: 20kw≤x≤50kw; The second power interval range y satisfies: y<20kw or y>50kw.

[0039] It should be noted that the range extender must meet at least one of the following conditions to meet the start-up conditions: Condition 1: When the remaining power of the battery pack of the vehicle drops to a first preset threshold value, in this embodiment, the first preset threshold value is ≤30%, the range extender will be activated to prevent the electric vehicle from being forced to tow due to power exhaustion; Condition 2: When the remaining power of the battery pack of the vehicle reaches a second preset threshold value, in this embodiment, the second preset threshold value is between 70% and 76%, the range extender will be activated to reserve more power to meet the subsequent possible high-speed driving or high energy consumption requirements; Condition three: when the vehicle is in a congested urban road condition, it should be noted that, in this embodiment, if the vehicle is often in a low-speed driving or frequent start-stop state, it is judged that the vehicle is in a congested urban road condition at this time. At this time, the range extender can be started when the battery power drops to a lower level to use the battery to supply power and reduce energy consumption; Condition four: When the vehicle is in a high-speed driving condition, the basis for judging whether the vehicle is in a high-speed driving condition is whether the vehicle exceeds 120 kilometers per hour. In order to maintain the battery power and reduce the number of charging times, the range extender can be started when the battery power is relatively high.

[0040] It should be noted that the response control strategy includes a power following response strategy and a point selection response strategy, wherein When the range extender switches to the first working mode, the power following response strategy is executed to adjust the output power of the range extender according to the actual power demand of the vehicle to ensure that the vehicle can run stably. This method can ensure that the range extender always works at a working point that meets the vehicle's needs and has good fuel economy, thereby avoiding multi-stage energy conversion and unnecessary energy loss; When the range extender switches to the second working mode, the point selection response strategy is executed, specifically, multiple output power points are selected in the pre-selected high-efficiency working area, and the output power point of the range extender is determined according to the vehicle driving conditions and the driver's driving intention. This method can ensure that the range extender always operates in the high-efficiency area, thereby improving energy utilization efficiency.

[0041] Example 3 This embodiment provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the range extender power response control method as described above is implemented.

[0042] Example 4 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 executes the range extender power response control method as described above.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 range extender power response control method, characterized in that: include: The vehicle controller obtains vehicle driving information, wherein the vehicle driving information includes the vehicle driving condition and the remaining power of the battery pack; Determine whether the range extender meets the start-up conditions based on the vehicle driving information, If yes, the range extender receives the power generation request from the vehicle controller; executing a first determination process according to the requested generated power, and selecting different response control strategies based on the result of the first determination process; A power generation process is performed based on the responsive control strategy.

2. The range extender power response control method according to claim 1, characterized in that: The first judgment process includes performing power judgment based on the received generated power and confirming the working mode corresponding to the 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, a correspondence between the engine speed and the power is pre-set in the vehicle controller, and according to the correspondence, the power of the range extender is converted into a speed and a torque for power generation after selecting a response control strategy.

4. The range extender power response control method according to claim 1, characterized in that: in, Before determining whether the range extender meets the start-up condition, the method further includes: A first power interval range and a second power interval range are pre-defined in the vehicle controller, 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.

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 interval range y satisfies: y<20kw or y>50kw.

6. The range extender power response control method according to claim 1, characterized in that: The range extender meets the start-up condition only if at least one of the following conditions is met: Condition 1: the remaining power of the vehicle battery pack drops to a first preset threshold; Condition 2: the remaining power of the vehicle battery pack reaches a second preset threshold; Condition 3: When the vehicle is driving in a congested urban environment; Condition four: when the vehicle is driving at high speed.

7. The range extender power response control method according to claim 1, characterized in that: The response control strategy includes a power following response strategy and a point selection response strategy, wherein When the range extender switches to the first working mode, a power following response strategy is executed to adjust the output power of the range extender according to the actual power demand of the vehicle; When the range extender switches to the second working mode, a point selection response strategy is executed, specifically, multiple output power points are selected in a pre-selected efficient working area, and the output power point of the range extender is determined according to the vehicle driving conditions and the driver's driving intention.

8. A range extender power response control system, characterized in that: The method for executing the method as claimed in any one of claims 1 to 7 to respond to the power of the range extender comprises a vehicle controller and a range extender, wherein The vehicle controller is used to obtain vehicle driving information, wherein the vehicle driving information includes the vehicle driving condition and the remaining power of the battery pack; Determine whether the range extender meets the start-up conditions based on the vehicle driving information, If yes, a power generation request is sent; The range extender is used to receive a request for generating power; executing a first determination process according to the requested generated power, and selecting different response control strategies based on the result of the first determination process; A power generation process is performed based on the responsive control strategy.

9. A computer device, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the range extender power response control method according to any one of claims 1 to 7 is implemented.

10. A computer storage medium, characterized in that: The computer storage medium stores instructions, and when the instructions are executed on a computer, the computer executes the range extender power response control method according to any one of claims 1 to 7.

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