Range extender control method and device of vehicle, vehicle and computer readable storage medium

Abstract

The invention discloses a vehicle range extender control method and device, a vehicle and a storage medium, and the method comprises the steps: obtaining an electric quantity value of a power battery of the vehicle and a vehicle speed value of the vehicle in response to a quiet mode of the vehicle; if the electric quantity value of the power battery is larger than the forced starting electric quantity value and smaller than the dynamic starting electric quantity value, the target working state of the range extender is determined based on the vehicle speed value of the vehicle; wherein the forced starting electric quantity value is an electric quantity critical value of forced starting power generation of the range extender, and the dynamic starting electric quantity value is an electric quantity critical value of dynamic starting power generation of the range extender; and controlling the range extender to start and stop based on the target working state. By applying the technical scheme, the NVH performance of the vehicle can be taken into account while the requirement for power guarantee of the vehicle can be met.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle range extender control, and in particular to a vehicle range extender control method, device, vehicle and computer-readable storage medium. Background Art

[0002] In the range-extended hybrid vehicles of related technologies, although the user's range anxiety can be reduced to a certain extent, when the vehicle's power level is lower than a certain value and the range extender is used to generate electricity, it will lead to unfavorable factors such as poor NVH (Noise, Vibration, Harshness) performance of the vehicle, which may bring a bad experience to the user.

[0003] Application Contents

[0004] In view of the above problems, the present application provides a vehicle range extender control method, device, vehicle and computer-readable storage medium, which are used to solve the problem of poor NVH performance when the range extender is generating electricity in the related art.

[0005] According to one aspect of an embodiment of the present application, a method for controlling a range extender of a vehicle is provided, the method comprising: in response to a quiet mode of the vehicle, obtaining a power value and a vehicle speed value of a power battery of the vehicle; if the power value of the power battery is greater than a forced start power value and less than a dynamic start power value, determining a target operating state of the range extender based on the vehicle speed value; wherein the forced start power value is a power critical value for forced start power generation of the range extender, and the dynamic start power value is a power critical value for dynamic start power generation of the range extender; and controlling the start and stop of the range extender based on the target operating state.

[0006] In an optional manner, the method for determining the target operating state of the range extender based on the vehicle speed value includes: if the vehicle is determined to be in a stationary state based on the vehicle speed value, determining the target operating state of the range extender to be a shutdown state; and\or, if the vehicle is determined to be in a non-stationary state based on the vehicle speed value, and the vehicle speed value is less than a first preset speed value and the power value of the power battery is between a first preset starting power value and the dynamic starting power value, determining the target operating state of the range extender to be a shutdown state; wherein the first preset starting power value is greater than the forced starting power value and less than the dynamic starting power value.

[0007] In an optional manner, the method for determining the target operating state of the range extender based on the vehicle speed value includes: if the vehicle speed value is greater than a first preset vehicle speed value, and the power value of the power battery is between the first preset starting power value and the dynamic starting power value, then determining that the target operating state of the range extender is a starting state; and\or, if the vehicle is determined to be in a non-stationary state based on the vehicle speed value, and the power value of the power battery is between the forced starting power value and the first preset starting power value, then determining that the operating state of the range extender is a starting state, so as to obtain the target operating state of the range extender; wherein, the first preset starting power value is greater than the forced starting power value and less than the dynamic starting power value.

[0008] In an optional manner, the method also includes: obtaining a charge change value of the power battery; if it is determined based on the charge change value of the power battery that the current charge value of the vehicle has decreased relative to the charge value at a previous moment, and the current charge value of the vehicle has decreased relative to the charge value at the previous moment to be equal to or greater than a charge threshold, then switching the quiet mode to a power conservation mode; based on the power conservation mode, controlling the range extender to start and stop, so as to force the start of power generation when the charge value of the power battery is lower than a second preset starting charge value, and dynamically start power generation when the charge value of the power battery is greater than or equal to the second preset starting charge value; wherein the second preset starting charge value is greater than the dynamic starting charge value.

[0009] In an optional manner, the method for controlling the start and stop of the range extender based on the power conservation mode includes: obtaining the basic power of the range extender and obtaining the driving condition information of the vehicle and the power consumption information of the on-board electrical appliances, the basic power being the initial power generation power after the range extender is started; determining the compensation power based on at least one of the driving condition information and the power consumption information of the on-board electrical appliances; determining the target power generation power of the range extender based on the sum of the compensation power and the basic power; and controlling the start of the range extender based on the target power generation power.

[0010] In an optional manner, the method also includes: obtaining a power frequency avoidance interval of the range extender; if the target power generation power is within the power frequency avoidance interval, adjusting the target power generation power based on the maximum power value in the power frequency avoidance interval; and using the adjusted target power generation power as the power generation power after the range extender is started.

[0011] In an optional manner, the method also includes: if it is determined based on the charge change value of the power battery that the charge value of the vehicle within the preset time is on an upward trend, and the charge value of the vehicle within the preset time increases to be equal to or greater than the preset charge value, then obtaining the average speed value of the vehicle within the preset time; if the average speed value is greater than the preset speed value, switching the power conservation mode to the quiet mode.

[0012] According to another aspect of an embodiment of the present application, a control device for a vehicle range extender is provided, the device comprising: an acquisition module, responsive to a quiet mode of the vehicle, acquiring a power value of the power battery and a vehicle speed value; a determination module, determining a target operating state of the range extender based on the vehicle speed value if the power value of the power battery is greater than a forced start power value and less than a dynamic start power value; wherein the forced start power value is a critical power value for forced start power generation of the range extender, and the dynamic start power value is a critical power value for dynamic start power generation of the range extender; and a control module, controlling the start and stop of the range extender based on the target operating state.

[0013] According to another aspect of an embodiment of the present application, a vehicle is provided, characterized in that it includes: a controller; and a memory for storing one or more programs, which, when the one or more programs are executed by the controller, enables the controller to implement the above-mentioned vehicle range extender control method.

[0014] According to another aspect of the embodiment of the present application, a computer-readable storage medium is provided, wherein a computer program is stored in the storage medium, wherein the computer program includes at least one executable instruction, wherein when the executable instruction is executed on a range extender control device of a vehicle / vehicle, the range extender control device of the vehicle / vehicle performs the operation of the range extender control method of the vehicle described above.

[0015] In an embodiment of the present application, when the power value of the power battery drops to a value greater than the forced start power value and less than the dynamic start power value, the range extender can be controlled to be in a shutdown state when the vehicle speed value is relatively low, so as to avoid the situation where the tire noise or environmental noise at a relatively low speed value cannot cover the starting noise of the range extender, thereby improving the NVH performance; and when the vehicle speed value is relatively high, the range extender is controlled to start and generate electricity, so as to achieve power conservation while also being able to cover the starting noise of the range extender with the tire noise or environmental noise at a relatively high speed value, thereby reducing the impact of the range extender on the vehicle's NVH performance when generating electricity.

[0016] In summary, the vehicle's range extender control method can meet the vehicle's power conservation needs while taking into account the vehicle's NVH performance.

[0017] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0019] Figure 1 A schematic block diagram of the process of steps S210 - S230 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0020] Figure 2 A schematic block diagram of the process of steps S240 - S260 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0021] Figure 3 A schematic block diagram of the process of steps S261 - S263 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0022] Figure 4 A schematic block diagram of the process of steps S2631 - S2633 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0023] Figure 5 A schematic block diagram of the process of steps S250`-S260` of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0024] Figure 6 A schematic structural diagram of a first embodiment of a range extender control device for a vehicle provided by the present application is shown;

[0025] Figure 7 A schematic structural diagram of an embodiment of the vehicle of the present application is shown. DETAILED DESCRIPTION

[0026] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0027] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0028] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0029] The term "multiple" as used in this application refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0030] In the related art, whether in the fuel priority driving mode or the pure electric priority driving mode, the corresponding power generation strategy of the range extender will set a forced start power value to start the range extender to generate electricity when the power value of the power battery drops to or below the forced start power value. Among them, the forced start power value of the fuel priority driving mode will be greater than the forced start power value of the pure electric priority driving mode.

[0031] For example, the mandatory start power value of the fuel priority driving mode generally ranges from 70% to 80% of the full power value. If the mandatory start power value of the fuel priority driving mode is 80% of the full power value, the range extender starts to generate electricity when the power value of the power battery drops to 80% of the full power value. Correspondingly, the mandatory start power value of the pure electric priority driving mode generally ranges from 20% to 30% of the full power value. Among them, if the mandatory start power value of the pure electric priority driving mode is 20% of the full power value, the range extender starts to generate electricity when the power value of the power battery drops to 20% of the full power value.

[0032] In an exemplary embodiment of the present application, after the range extender is started and generates electricity, certain noise and vibration will be generated, thereby affecting the NVH performance of the vehicle. Moreover, the greater the power generation power of the range extender, the greater the noise and the stronger the vibration generated, and the worse the NVH performance of the corresponding vehicle.

[0033] Based on this, combined Figures 1 to 7As shown, the embodiments of the present application respectively propose a control method of a vehicle range extender, a control device 300 of a vehicle range extender, a vehicle, a computer-readable storage medium, and a computer program product to solve the above problems. These embodiments will be described in detail below.

[0034] In an exemplary embodiment of the present application, Figure 1 The schematic flow chart of steps S210-S230 of a vehicle range extender control method provided in an embodiment of the present application is shown, and the method is executed by a vehicle terminal. Figure 1 As shown, the method includes steps S210 to S230, which are described in detail as follows:

[0035] Step S210: In response to the quiet mode of the vehicle, obtaining the power value of the power battery and the vehicle speed value.

[0036] In an exemplary embodiment of the present application, whether the vehicle is in the fuel priority driving mode or the pure electric priority driving mode, it includes two modes: quiet mode and power conservation mode. After the vehicle is started, whether it enters the fuel priority driving mode or the pure electric priority driving mode, it will first enter the quiet mode. Among them, the quiet mode is a mode that gives priority to improving the NVH performance of the vehicle while meeting the vehicle's power conservation requirements; and the power conservation mode is a mode that gives priority to the power conservation requirements while meeting the vehicle's NVH performance.

[0037] In addition, the power value of the power battery and the speed value of the vehicle are obtained in real time, so that it is convenient to judge in real time according to the power value of the power battery whether the power requirement for starting the range extender is met, and then it is convenient to judge in real time according to the speed value of the vehicle whether the tire noise or wind noise generated when the vehicle is at the current speed value can cover the noise after the range extender is started.

[0038] Step S220: If the power value of the power battery is greater than the forced start power value and less than the dynamic start power value, the target working state of the range extender is determined based on the vehicle speed value; wherein the forced start power value is the power critical value for the range extender to force start power generation, and the dynamic start power value is the power critical value for the dynamic start power generation. The target working state includes the shutdown state and the startup state. The range extender will not generate electricity when it is in the shutdown state, and it will generate electricity immediately when it is in the startup state.

[0039] For example, the forced start power value of the vehicle in pure electric priority mode is 20% of the full power value, and the dynamic start power value is 40% of the full power value. If the power value of the power battery is 30%, the range extender can determine the working state of the range extender according to the vehicle speed value, that is, the range extender is in a non-forced start state.

[0040] In an exemplary embodiment of the present application, regardless of the pure electric priority mode or the fuel priority mode, in the target working state in the quiet mode: when the power value of the power battery is equal to or less than the forced start power value, the range extender is in the forced start state, that is, regardless of the vehicle speed value, the range extender will start to generate electricity; when the power value of the power battery is less than the dynamic start power value and the forced start power value, the range extender performs dynamic start power generation (that is, it chooses whether to start power generation according to the vehicle speed value), and when the power value of the power battery is greater than the dynamic start power value, power generation is not started.

[0041] In addition, the vehicle's quiet mode in fuel priority mode is basically the same as the vehicle's quiet mode in pure electric priority mode. The only difference is that the forced start power value and the dynamic start power value are different, that is, the forced start power value and the dynamic start power value in the fuel priority mode are both correspondingly greater than the forced start power value and the dynamic start power value in the pure electric priority mode.

[0042] In an exemplary embodiment of the present application, after the power value of the power battery is greater than the forced start power value and less than the dynamic start power value, the step method of determining the target operating state of the range extender based on the vehicle speed value includes: if the vehicle is determined to be in a stationary state based on the vehicle speed value, then determining the target operating state of the range extender to be a shutdown state.

[0043] In an exemplary embodiment of the present application, when the vehicle is stationary, that is, when the vehicle speed value is 0, it can be judged that the vehicle is in a relatively quiet state, and the power consumption is relatively low compared to when the vehicle is in operation. Therefore, in order to avoid the vehicle making noise and generating vibration after starting the range extender, thereby affecting the NVH performance, the target working state of the range extender can be controlled to be a shutdown state. Among them, the vehicle is stationary means that the vehicle is in operation, that is, the engine is not turned off.

[0044] In an exemplary embodiment of the present application, after the power value of the power battery is greater than the forced start power value and less than the dynamic start power value, the step method of determining the target working state of the range extender based on the vehicle speed value includes: if the vehicle is determined to be in a non-stationary state based on the vehicle speed value, and the vehicle speed value is less than a first preset vehicle speed value and the power value of the power battery is between the first preset start power value and the dynamic start power value, then determining the target working state of the range extender to be a shutdown state. Wherein, the first preset start power value is between the forced start power value and the dynamic start power value.

[0045] For example, the first preset vehicle speed value can be set by the user. It can also be determined based on the noise and vibration after the range extender is started (for example, according to the test, when the vehicle is at speed a, the tire noise or wind noise generated by the vehicle just covers the noise emitted after the range extender is started, or after the tire noise or wind noise generated by the vehicle covers the noise emitted after the range extender is started, the noise emitted after the range extender is started has reached a prominent weaker state relative to other noises; and when the speed is a, the vibration after the range extender is started has the weakest impact on driving, at this time, speed a can be determined as the first preset vehicle speed value).

[0046] Optionally, the first preset vehicle speed value is 30km / h.

[0047] For example, the first preset starting power value may be: when the power value of the power battery reaches the first preset starting power value, if all electrical components in the vehicle are fully turned on for one hour after parking, the power value of the power battery just reaches the forced starting power value. Correspondingly, the calculation method of the first preset starting power value may be: first preset starting power value = forced starting power value + P × T / E. Wherein, P is the static power consumption, for example, P = 3KW, T is the static vehicle use time, for example, T = 1h, and E is the battery capacity of the vehicle, for example, E = 35kwh.

[0048] In an exemplary embodiment of the present application, when the vehicle is not stationary and the vehicle speed is less than a first preset vehicle speed, it can be determined that the battery level of the vehicle is about to reach a forced starting power level during driving. However, due to the low vehicle speed, the impact of noise and vibration after the range extender is started cannot be reduced. Therefore, the start of the range extender can be delayed by setting the first preset starting power level, thereby achieving both power conservation and NVH performance to a certain extent.

[0049] For example, after the vehicle has traveled to a point where the power value is equal to the starting power value, if the power value required to reach the destination is less than the difference between the dynamic starting power value and the first preset starting power value; that is, after the vehicle reaches the destination, the remaining power value is likely to be greater than the first preset starting power value. At this time, by delaying the start of the range extender until the power value of the power battery is equal to the first preset starting power value, the start of the range extender can be reduced once during this driving process, thereby reducing the impact of noise and vibration after the start of the range extender on the user.

[0050] In an exemplary embodiment of the present application, if it is predicted that the remaining power value of the vehicle after reaching the destination is greater than the first preset starting power value and less than the dynamic starting power value. Then, even if the range extender is started after the power value of the power battery drops to the dynamic starting power value, it is highly likely that the range extender of the vehicle can only be started for a short time before parking and shutting down. At this time, the power value of the power battery may not have risen to a value greater than the dynamic starting power value. Therefore, the range extender may be started again after the vehicle is started next time, and the user will most likely have two opportunities to feel the impact of the start of the range extender. After delaying the start of the range extender until the power value of the power battery is equal to the first preset starting power value, corresponding to the above situation, the situation where the vehicle starts the range extender before shutting down can be reduced, thereby reducing the impact of noise and vibration after the range extender is started on the user.

[0051] In addition, when the vehicle speed is less than the first preset speed value, the power value of the power battery is maintained near the first preset starting power value, rather than the forced starting power value. Therefore, even if the power value of the power battery is equal to the first preset starting power value when the vehicle is parked but the engine is not turned off, the range extender will not be started until the power value drops from the first preset starting power value to the forced starting power value, thereby meeting the user's power demand after parking, and avoiding the impact of noise and vibration after the range extender is started on the user during this period.

[0052] In an exemplary embodiment of the present application, after the power value of the power battery is greater than the forced start power value and less than the dynamic start power value, the step of determining the target operating state of the range extender based on the vehicle speed value also includes: if the vehicle speed value is greater than a first preset speed value, and the power value of the power battery is between the first preset start power value and the dynamic start power value, then determining that the target operating state of the range extender is the start state.

[0053] In an exemplary embodiment of the present application, when the vehicle speed value is greater than the first preset vehicle speed value, it means that the tire noise or wind noise generated by the vehicle can cover the noise generated after the range extender is started, thereby reducing the impact of the range extender on the user after it is started. Therefore, if the power value of the power battery is between the first preset starting power value and the dynamic starting power value, the range extender can be started to generate electricity in advance to maintain the power value of the power battery near the first preset starting power value, thereby facilitating the range extender to be turned off when the vehicle is parked, thereby avoiding the impact of the range extender on the user after it is started.

[0054] In an exemplary embodiment of the present application, after the power value of the power battery is greater than the forced start power value and less than the dynamic start power value, the step of determining the target operating state of the range extender based on the vehicle speed value also includes: if the vehicle is determined to be in a non-stationary state based on the vehicle speed value, and the power value of the power battery is between the forced start power value and the first preset start power value, then determining that the target operating state of the range extender is a start state.

[0055] In an exemplary embodiment of the present application, when the power value of the power battery drops to between the forced start power value and the first preset start power value, if the vehicle is not stationary, it means that the power value of the power battery is likely to drop to the forced start power value; or, after the vehicle is parked, it is also likely that the user's power demand cannot be met before the power value of the power battery drops to the forced start power value. Therefore, the vehicle is likely to inevitably start the range extender, and then the range extender can be started in advance to generate electricity after the power value of the power battery drops to between the forced start power value and the first preset start power value, so as to ensure that the power value of the power battery can be maintained near the first preset start power value, or at least ensure that the power value of the power battery can be maintained near the forced start power value.

[0056] Step S230: Controlling the range extender to start and stop based on the target operating state.

[0057] In the present application, after the range extender is controlled to start and stop based on the target working state, when the power value of the power battery drops to a value greater than the forced start power value and less than the dynamic start power value, if the vehicle is stationary, the range extender can be controlled to be in a shutdown state; at the same time, if the vehicle is not stationary, and the vehicle speed value is less than the first preset vehicle speed value and the power value of the power battery is between the first preset start power value and the dynamic start power value, the range extender can also be controlled to be in a shutdown state to improve the NVH performance of the vehicle. When the vehicle speed value is greater than the first preset vehicle speed value and the power value of the power battery is between the first preset start power value and the dynamic start power value, the range extender is started in advance to generate electricity; and when the vehicle is not stationary and the power value of the power battery is between the forced start power value and the first preset start power value, the range extender is started in advance to generate electricity to meet the vehicle's power conservation needs. Therefore, the vehicle's range extender control method can meet the vehicle's power conservation needs while also taking into account the vehicle's NVH performance.

[0058] In an exemplary embodiment of the present application, in order to further meet the vehicle power conservation requirements and take into account the vehicle's NVH performance, the vehicle's range extender control method also includes setting a suitable power generation reference power as the power generation power after the range extender is started.

[0059] For example, if the vehicle speed value is greater than the first preset speed value, and the power value of the power battery is between the first preset starting power value and the dynamic starting power value, the drag power required for the vehicle to overcome air resistance is determined based on the vehicle speed value, and the drag power is determined as the power generated after the range extender is started.

[0060] For example, if the vehicle is not stationary and the power value of the power battery is between the first preset starting power value and the forced starting power value, the power generation power after the range extender is started can be set to low power generation P. The low power generation P is 3KW.

[0061] For example, after the power value of the power battery drops to be equal to or less than the forced start power value, the power generation power after the range extender is started can be set to a power value greater than the resistance power.

[0062] In an exemplary embodiment of the present application, Figure 2 A schematic flow chart of steps S240-S260 of a vehicle range extender control method provided in an embodiment of the present application is shown, combined with Figure 2 As shown, in order to avoid the difficulty of the vehicle to maintain power under some special working conditions, resulting in the continuous decrease of the vehicle's power supply and the trouble of power loss for the user, the vehicle's range extender control method also includes obtaining the real-time working condition information of the vehicle, and determining whether it is necessary to switch the power generation strategy of the range extender from the quiet mode to the power conservation mode according to the difference between the real-time working condition information of the vehicle and the preset working condition information. Among them, the vehicle's range extender control method includes steps S240 to S250, which are described in detail as follows:

[0063] Step S240: Obtain the power change value of the power battery.

[0064] In an exemplary embodiment of the present application, obtaining the power battery charge change value means: after the vehicle is started, the actual average speed of the vehicle is obtained once at a predetermined interval (for example, set to 30 minutes); if the actual average speed is less than the preset average speed (for example, set to 30 km / h), the power drop of the vehicle within the predetermined time is calculated; or, the actual average slope of the vehicle is obtained once every preset mileage (for example, 5 km); if the actual average slope is greater than the preset average slope (for example, set to 3°), the power drop of the vehicle within the preset mileage is calculated.

[0065] In an exemplary embodiment of the present application, if the actual average vehicle speed value is less than the preset average vehicle speed value within the predetermined time, it can be said that the vehicle is traveling at a low speed or is in a parking power situation. At this time, it can be determined whether the vehicle is in a high power consumption condition based on the value of the vehicle's power reduction within the predetermined time, and then determine whether the vehicle needs to increase the priority of power conservation needs. At the same time, if the actual average slope value is greater than the preset average slope value within the preset mileage, it means that the vehicle is on a long uphill slope. At this time, it can also be determined whether the vehicle is in a high power consumption condition based on the value of the vehicle's power reduction within the predetermined time, and then determine whether the vehicle needs to increase the priority of power conservation needs.

[0066] Step S250: If it is determined based on the power change value of the power battery that the current power value of the vehicle decreases relative to the power value at the previous moment, and the current power value of the vehicle decreases relative to the power value at the previous moment to be equal to or greater than the power threshold, the quiet mode is switched to the power conservation mode.

[0067] In an exemplary embodiment of the present application, if the current power value of the vehicle is determined to be equal to or greater than the power value at the previous moment based on the power change value of the power battery, it means that if the range extender is continued to be controlled to start and stop in the quiet mode, it is likely that the vehicle will not be able to maintain power. Therefore, it is necessary to switch to the power conservation mode to ensure that the vehicle can maintain power.

[0068] Step S260: Control the range extender to start and stop based on the target working state, so as to forcibly start power generation when the power value of the power battery is lower than the second preset starting power value, and dynamically start power generation when the power value of the power battery is greater than or equal to the second preset starting power value.

[0069] In an exemplary embodiment of the present application, if the current power value of the vehicle drops by a power threshold value (e.g., 5% of the vehicle's full power value) relative to the power value at the previous moment, it means that the vehicle is in a high power consumption condition and the vehicle needs to increase the priority of power conservation. At this time, the power generation strategy of the range extender can be switched to the power conservation mode to generate power in advance to ensure that the power of the vehicle after parking can be maintained at the forced start power value or the first preset start power value.

[0070] For example, the range extender is controlled to start and stop based on the target working state, and if the power value of the power battery is greater than or equal to the second preset starting power value, and less than the third preset starting power value: if the vehicle speed is greater than the second preset speed value (the second preset speed value is greater than the first preset speed value), the range extender is controlled to start to generate electricity in advance; if the vehicle speed is less than the third preset speed value (the third preset speed value is less than the first preset speed value), the range extender is controlled to stop starting.

[0071] For example, when the range extender is controlled to start and stop based on the target working state, and if the power value of the power battery is less than the second preset starting power value: the range extender is controlled to start to generate electricity in advance.

[0072] Optionally, when the dynamic starting power value is 30% of the vehicle's full power value, the second preset starting power value is 55% of the vehicle's full power value, and the third preset starting power value is 80% of the vehicle's full power value.

[0073] Optionally, when the first preset speed value is 30 km / h, the second preset speed value is 25 km / h, and the third preset speed value is 10 km / h,

[0074] In an exemplary embodiment of the present application, Figure 3 The schematic flow chart of steps S261-S263 of a vehicle range extender control method provided in an embodiment of the present application is shown. Figure 4 As shown, when the vehicle controls the range extender to generate electricity based on the power conservation mode, in order to meet the vehicle's power conservation needs and take into account the vehicle's NVH performance, the vehicle's range extender control method also includes setting a suitable target power generation power as the power generation power after the range extender is started. Among them, the vehicle's range extender control method includes steps S261 to S263, which are described in detail as follows:

[0075] Step S261: Obtain the basic power of the range extender and obtain the vehicle's driving road condition information and vehicle electrical appliance power consumption information.

[0076] For example, the base power is the initial power generated after the range extender is started (for example, set to 3KW)

[0077] Step S262: Determine the compensation power based on at least one of the driving road condition information and the vehicle electrical appliance power consumption information.

[0078] For example, driving road condition information includes the slope value of the vehicle and the speed value of the vehicle. When determining the compensation power based on the driving road condition information, the corresponding road condition compensation power can be obtained through a mapping relationship table corresponding to the road condition compensation power, slope value and speed value that has been calibrated in advance. Among them, the mapping relationship table may include the road condition compensation power for slope values ​​corresponding to different vehicle speed values.

[0079] For example, when the compensation power is determined based on the power consumption information of the vehicle electrical appliances, where the power consumption information includes the power consumption of each vehicle electrical appliance in use in the vehicle, the sum of the power consumption of each electrical device in use in the vehicle can be determined as the electrical device compensation power.

[0080] In an exemplary embodiment of the present application, when the compensation power is determined based on both the driving road condition information and the vehicle-mounted electrical appliance power consumption information, it can be obtained by adding the road condition compensation power to the electrical device compensation power.

[0081] Step S263: Calculate the target power generation after the range extender is started based on the sum of the compensation power and the basic power.

[0082] For example, when the range extender is controlled to start and stop based on the target working state, and if the power value of the power battery is greater than or equal to the second preset starting power value, and less than the third preset starting power value: if the vehicle is not stationary, the target power generation power of the range extender is the basic power + road condition compensation power + electrical device compensation power. When the range extender is controlled to start and stop based on the target working state, and if the power value of the power battery is less than the second preset starting power value: if the vehicle is not stationary, the target power generation power of the range extender is the basic power + max (electrical device compensation power, basic power). When the range extender is controlled to start and stop based on the target working state, and if the power value of the power battery is less than the second preset starting power value: if the vehicle is stationary, the target power generation power of the range extender is the basic power + max (electrical device compensation power, basic power).

[0083] In an exemplary embodiment of the present application, after the range extender is started based on the target power generation control, since the target power generation includes the basic power and the compensation power, power conservation can be performed better.

[0084] In an exemplary embodiment of the present application, Figure 4 A schematic flow chart of steps S2631-S2633 of a vehicle range extender control method provided in an embodiment of the present application is shown, combined with Figure 4 As shown, in order to reduce the resonance between the range extender and the vehicle itself after starting, it is necessary to avoid some special power values ​​for the target power generation of the range extender. Therefore, before controlling the range extender to start based on the target power generation, the vehicle range extender control method also includes steps S2631 to S2633, which are described in detail as follows:

[0085] Step S2631: Obtain the power frequency avoidance interval of the range extender.

[0086] In an exemplary embodiment of the present application, each frequency avoidance point can be obtained according to the actual vehicle test. For example, the obtained frequency avoidance points are p1, p2, p3 and p4, then the corresponding power frequency avoidance intervals can be established according to p1, p2, p3 and p4: (p1, p2), (p3, p4). Among them, each frequency avoidance point is the power at which NVH beat frequency and steering wheel vibration exist after the range extender is started in the actual vehicle test.

[0087] For example, according to actual vehicle tests, when the vehicle's cooling fan opening n≥75%, when the power generation power is between 4.5-8KW, there are problems such as NVH beat frequency and steering wheel shaking. Then the interval (4.5KW, 8KW) can be one of the power frequency avoidance intervals.

[0088] Step S2632: If the target power generation is within the power frequency avoidance interval, the target power generation is adjusted based on the maximum power value in the power frequency avoidance interval.

[0089] For example, if the target power generation is P`, p1<P`≤p2, then p2 is used as the adjusted target power generation; p3<P`≤p4, then p4 is used as the adjusted target power generation, and so on.

[0090] In addition, if the target power generation is outside the power frequency avoidance interval, there is no need to adjust the target power generation.

[0091] Step S2633: The adjusted target power generation is used as the power generation after the range extender is started.

[0092] In an exemplary embodiment of the present application, after avoiding the high-speed and low-speed power points that resonate with the vehicle itself after the range extender is started, during the extended-range power generation process, when the cooling fan opening reaches more than 75%, there is almost no NVH beat frequency problem.

[0093] In an exemplary embodiment of the present application, Figure 5 The schematic flow chart of steps S250`-S260` of a vehicle range extender control method provided in an embodiment of the present application is shown. Figure 5 As shown, in order to ensure that the vehicle can smoothly switch to the target working state to control the range extender to start and stop after the vehicle controls the range extender to start and stop based on the target working state, the vehicle range extender control method also includes steps S250' to S260', which are described in detail as follows:

[0094] Step S250`: If it is determined based on the power change value of the power battery that the power value of the vehicle within the preset time is on an upward trend, and the power value of the vehicle within the preset time increases to be equal to or greater than the preset power value, then the average speed value of the vehicle within the preset time is obtained.

[0095] For example, the preset time may be 5 minutes, and the preset power value may be 5% of the full power value of the vehicle.

[0096] Step S260 ′: If the average speed value is greater than the preset speed value, the power conservation mode is switched to the quiet mode, and the range extender is continued to be controlled to start and stop based on the quiet mode.

[0097] For example, the preset speed value is 40 km / h.

[0098] In an exemplary embodiment of the present application, after the vehicle controls the range extender to start and stop based on the target operating state, if it is detected that the vehicle meets the requirements for switching to quiet mode, it needs to switch to quiet mode and continue to control the range extender to start and stop in quiet mode.

[0099] The vehicle range extender control method of the present application can control the range extender to start and stop based on the quiet mode after the vehicle is started, so that when the power value of the power battery drops to a value greater than the forced start power value and less than the dynamic start power value, and the vehicle is in a stationary state; and when the vehicle is in a non-stationary state, and the vehicle speed value is less than the first preset speed value and the power value of the power battery is between the first preset start power value and the dynamic start power value, the range extender is controlled to be in a shutdown state to improve the NVH performance of the vehicle. When the vehicle speed value is greater than the first preset speed value, and the power value of the power battery is between the first preset start power value and the dynamic start power value; and when the power value of the power battery is between the forced start power value and the first preset start power value, the range extender is started in advance to generate electricity to meet the vehicle's power conservation needs.

[0100] In addition, the vehicle's range extender control method can also choose whether to switch the range extender's power generation strategy from the quiet mode to the power conservation mode according to the vehicle's real-time operating condition information, so as to force the start of power generation when the power value of the power battery is lower than the second preset starting power value (the second preset starting power value is greater than the dynamic starting power value), and dynamically start power generation when the power value of the power battery is greater than or equal to the second preset starting power value, so as to further start the range extender in advance to generate electricity, and ultimately avoid the situation where the vehicle is difficult to conserve power under some special operating conditions.

[0101] Finally, when controlling the range extender to generate electricity, by avoiding the high-speed and low-speed power points that resonate with the vehicle itself after the range extender is started, there will be almost no NVH beat frequency problem during the range extender power generation process.

[0102] In summary, the vehicle's range extender control method can meet the vehicle's power conservation needs while taking into account the vehicle's NVH performance.

[0103] Figure 6 FIG. 3 is a schematic diagram showing a structure of a control device 300 for a vehicle range extender provided in an embodiment of the present application. Figure 6 As shown, in this embodiment, a control device 300 for a vehicle range extender is also provided, which is used to execute the control method for the vehicle range extender in the above embodiment.

[0104] The control device 300 of the vehicle range extender includes an acquisition module 310, and the acquisition module 310 is used to obtain the power value of the power battery and the speed value of the vehicle in response to the quiet mode of the vehicle.

[0105] The control device 300 of the vehicle range extender also includes a determination module 320, which is used to determine the target operating state of the range extender based on the vehicle speed value if the power value of the power battery is greater than the forced start power value and less than the dynamic start power value; wherein the forced start power value is the power critical value for the range extender to force start power generation, and the dynamic start power value is the power critical value for the range extender to dynamically start power generation.

[0106] The control device 300 for the vehicle range extender further includes a control module 330 , which is used to control the start and stop of the range extender based on a target working state.

[0107] The control device 300 of the vehicle range extender provided in the above embodiment and the control method of the vehicle range extender provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment and will not be repeated here.

[0108] Figure 7 A schematic diagram of the structure of an embodiment of the vehicle of the present application is shown, which shows a schematic diagram of the structure of a computer system of the vehicle suitable for implementing the embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the vehicle.

[0109] See also Figure 7 As shown, the vehicle includes: a controller; a memory for storing one or more programs, and when the one or more programs are executed by the controller, the above-mentioned vehicle range extender control method is executed.

[0110] Please continue reading Figure 7 As shown, the computer system 500 of the vehicle includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503, such as executing the method in the above embodiment. In RAM 503, various programs and data required for system operation are also stored. CPU 501, ROM 502 and RAM 503 are connected to each other through bus 504. Input / output (I / O) interface 505 is also connected to bus 504.

[0111] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.

[0112] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 509, and / or installed from a removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

[0113] Another aspect of the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the above vehicle range extender control method when executed by a processor. The computer-readable storage medium may be included in the vehicle described in the above embodiment, or may exist independently without being assembled into the vehicle.

[0114] Another aspect of the present application further provides a computer program product or a computer program, which includes at least one executable instruction, and when the executable instruction is run on the vehicle's range extender control device 300 / vehicle, the vehicle's range extender control device 300 / vehicle executes the vehicle's range extender control method as described above.

[0115] The computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0116] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0117] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0118] According to one aspect of an embodiment of the present application, a computer system is also provided, including a central processing unit (CPU), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage portion into a random access memory (RAM), such as executing the method in the above embodiment. In RAM, various programs and data required for system operation are also stored. CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0119] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface as needed. Removable media, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., are installed on the drive as needed so that the computer program read therefrom is installed into the storage part as needed.

[0120] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A vehicle range extender control method, characterized in that: The method comprises: In response to the quiet mode of the vehicle, obtaining a power value of a power battery of the vehicle and a vehicle speed value of the vehicle; If the power value of the power battery is greater than the forced start power value and less than the dynamic start power value, the target working state of the range extender is determined based on the vehicle speed value of the vehicle; wherein the forced start power value is the power critical value of the range extender for forced start of power generation, and the dynamic start power value is the power critical value of the range extender for dynamic start of power generation; The range extender is controlled to start and stop based on the target operating state.

2. The method according to claim 1, characterized in that The method for determining the target operating state of the range extender based on the vehicle speed value of the vehicle includes: If the vehicle is determined to be stationary based on the vehicle speed value, then the target operating state of the range extender is determined to be a shutdown state; and\or, If it is determined based on the vehicle speed value that the vehicle is in a non-stationary state, and the vehicle speed value is less than a first preset vehicle speed value and the power value of the power battery is between a first preset starting power value and the dynamic starting power value, then it is determined that the target operating state of the range extender is a shutdown state; The first preset startup power value is greater than the forced startup power value and less than the dynamic startup power value.

3. The method according to claim 1, characterized in that The method for determining the target operating state of the range extender based on the vehicle speed value of the vehicle includes: If the vehicle speed value is greater than a first preset vehicle speed value, and the power value of the power battery is between the first preset starting power value and the dynamic starting power value, then determining that the target operating state of the range extender is a starting state; and\or, If it is determined based on the vehicle speed value that the vehicle is in a non-stationary state, and the power value of the power battery is between the forced start power value and the first preset start power value, then the target operating state of the range extender is determined to be a start state; The first preset startup power value is greater than the forced startup power value and less than the dynamic startup power value.

4. The method according to claim 1, characterized in that The method further comprises: Obtaining a power change value of the power battery; If it is determined based on the power change value of the power battery that the current power value of the vehicle decreases relative to the power value at the previous moment, and the current power value of the vehicle decreases relative to the power value at the previous moment to be equal to or greater than the power threshold, the quiet mode is switched to the power conservation mode; Controlling the range extender to start and stop based on the power conservation mode, so as to forcibly start power generation when the power value of the power battery is lower than a second preset starting power value, and dynamically start power generation when the power value of the power battery is greater than or equal to the second preset starting power value; The second preset startup power value is greater than the dynamic startup power value.

5. The method according to claim 4, characterized in that The method further comprises: Obtaining the basic power of the range extender and obtaining the driving road condition information of the vehicle and the power consumption information of the on-board electrical appliances, wherein the basic power is the initial power generated by the range extender after it is started; Determining compensation power based on at least one of the driving road condition information and the power consumption information of the vehicle-mounted electrical appliances; The target power generation after the range extender is started is determined based on the sum of the compensation power and the basic power.

6. The method according to claim 5, characterized in that The method further comprises: Obtaining a power frequency avoidance interval of the range extender; If the target power generation is within the power frequency avoidance interval, adjusting the target power generation based on the maximum power value in the power frequency avoidance interval; The adjusted target generated power is used as the generated power after the range extender is started.

7. The method according to claim 4, characterized in that The method further comprises: If it is determined based on the power change value of the power battery that the power value of the vehicle within the preset time is in an upward trend, and the power value of the vehicle within the preset time increases to be equal to or greater than the preset power value, then the average speed value of the vehicle within the preset time is obtained; If the average speed value is greater than a preset speed value, the power conservation mode is switched to the quiet mode.

8. A control device for a vehicle range extender, characterized in that: The device comprises: An acquisition module, in response to the quiet mode of the vehicle, acquires the power value of the power battery and the speed value of the vehicle; The determination module determines the target working state of the range extender based on the vehicle speed value if the power value of the power battery is greater than the forced start power value and less than the dynamic start power value; wherein the forced start power value is the power critical value of the range extender for forced start power generation, and the dynamic start power value is the power critical value of the range extender for dynamic start power generation; A control module controls the range extender to start and stop based on the target working state.

9. A vehicle, characterized in that: include: Controller; A memory for storing one or more programs, which, when executed by the controller, enables the controller to implement the vehicle range extender control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which includes at least one executable instruction. When the executable instruction is executed on the vehicle's range extender control device / vehicle, the vehicle's range extender control device / vehicle performs the operation of the vehicle's range extender control method as described in any one of claims 1 to 7.

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