Range extender power generation control method and device, equipment, storage medium and program product

Abstract

The invention provides a range extender power generation control method and device, equipment, a storage medium and a program product, and relates to the technical field of vehicles. According to the range extender power generation control method, the current SOC of a battery in a range extending type vehicle is obtained, whether the set condition of working with the maximum allowable power generation power of the range extender is met or not is determined according to the current SOC, if not, the target power generation power of the range extender is determined according to the current SOC and the target SOC of the range extender, and according to the target power generation power, the range extender is controlled to work with the maximum allowable power generation power of the range extender. And controlling the range extender to generate power. The target power generation power of the range extender is dynamically adjusted based on the current SOC and the target SOC of the range extender, and the flexibility of power generation control of the range extender is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a range extender power generation control method, device, equipment, storage medium and program product. Background Art

[0002] An extended-range vehicle is an electric vehicle that combines the characteristics of a pure electric vehicle and a hybrid vehicle. It can provide a pure electric driving experience while solving the problems of limited range and slow charging of pure electric vehicles.

[0003] In the related art, the range extender power generation control method used in the range extender vehicle is fixed-point power generation. Specifically, when the range extender in the range extender vehicle is started, the range extender is controlled to generate power at a fixed power point. The fixed power point can be the operating point with the best fuel economy of the range extender.

[0004] However, the power generation control method of the range extender has the problem of poor flexibility. Summary of the invention

[0005] The present application provides a range extender power generation control method, device, equipment, storage medium and program product to solve the problem of poor flexibility in the range extender power generation control method in the related art.

[0006] In a first aspect, the present application provides a method for controlling power generation of a range extender, comprising: obtaining a current state of charge (SOC) of a battery in a range extender vehicle; determining, based on the current SOC, whether a set condition for operating at a maximum allowable power generation power of the range extender is met; if not met, determining a target power generation power of the range extender based on the current SOC and a target SOC of the range extender; and controlling power generation of the range extender based on the target power generation power.

[0007] In a possible implementation, the target power generation of the range extender is determined according to the current SOC and the target SOC, including: determining whether the current SOC is less than a first preset threshold, and determining whether the difference between the target SOC and the current SOC is greater than a second preset threshold; if the current SOC is less than the first preset threshold, and / or the difference is greater than the second preset threshold, determining the maximum allowable power generation of the range extender as the target power generation; if the current SOC is greater than or equal to the first preset threshold, and the difference is less than or equal to the second preset threshold, determining the target power generation according to the difference.

[0008] In one possible implementation, a target power generation power is determined based on the difference, including: determining whether the difference is within a preset interval; if the difference is within the preset interval, determining the target power generation power based on a first power and a second power, the first power being the average power of the total power consumed by the whole vehicle within a first preset time period, and the second power being the compensation power obtained through closed-loop control during power following control; if the difference is not within the preset interval, obtaining a third power, and determining the target power generation power based on the third power and the optimal fuel efficiency power generation power of the range extender, the third power being the average power of the total power consumed by the whole vehicle within the second preset time period.

[0009] In one possible implementation, the target power generation is determined based on the third power and the optimal fuel efficiency power generation of the range extender, including: determining whether the optimal fuel efficiency power generation is greater than the third power; if the optimal fuel efficiency power generation is greater than the third power, determining the optimal fuel efficiency power generation as the target power generation; if the optimal fuel efficiency power generation is less than or equal to the third power, determining the product of the compensation coefficient and the third power as the target power generation, and the compensation coefficient is greater than 1.

[0010] In a possible implementation manner, the compensation power is determined in the following manner: the output power of the range extender during the power generation process is acquired; and the compensation power is obtained according to the difference between the first power and the output power.

[0011] In a possible implementation, the range extender power generation control method also includes: during the power generation process of the range extender, determining whether the difference between the target SOC and the current SOC is greater than a third preset threshold; if the difference is greater than the third preset threshold, determining the target power generation power of the range extender based on the current SOC and the target SOC; if the difference is less than or equal to the third preset threshold, controlling the range extender to shut down.

[0012] In a possible implementation, the range extender power generation control method also includes: determining whether the difference between the target SOC and the current SOC is greater than a fourth preset threshold; if the difference is greater than the fourth preset threshold, starting the range extender; if the difference is less than or equal to the fourth preset threshold, not starting the range extender.

[0013] In a second aspect, the present application provides a range extender power generation control device, including: an acquisition module for acquiring the current SOC of a battery in a range extender vehicle; a first determination module for determining, based on the current SOC, whether a set condition for operating at the maximum allowable power generation of the range extender is met; a second determination module for determining a target power generation of the range extender based on the current SOC and a target SOC of the range extender when it is determined that the set condition for operating at the maximum allowable power generation of the range extender is not met; and a control module for controlling the power generation of the range extender based on the target power generation.

[0014] In one possible implementation, the second determination module is specifically used to: determine whether the current SOC is less than a first preset threshold, and determine whether the difference between the target SOC and the current SOC is greater than a second preset threshold; if the current SOC is less than the first preset threshold, and / or the difference is greater than the second preset threshold, determine the maximum allowable power generation of the range extender as the target power generation; if the current SOC is greater than or equal to the first preset threshold, and the difference is less than or equal to the second preset threshold, determine the target power generation based on the difference.

[0015] In one possible implementation, the second determination module is also used to: determine whether the difference is within a preset interval; if the difference is within the preset interval, determine the target power generation power based on the first power and the second power, the first power being the average power of the total power consumption of the whole vehicle within the first preset time period, and the second power being the compensation power obtained through closed-loop control during the power following control process; if the difference is not within the preset interval, obtain the third power, and determine the target power generation power based on the third power and the optimal fuel efficiency power generation power of the range extender, the third power being the average power of the total power consumption of the whole vehicle within the second preset time period.

[0016] In one possible implementation, the second determination module is also used to: determine whether the optimal fuel efficiency power generation is greater than the third power; if the optimal fuel efficiency power generation is greater than the third power, determine the optimal fuel efficiency power generation as the target power generation; if the optimal fuel efficiency power generation is less than or equal to the third power, determine the product of the compensation coefficient and the third power as the target power generation, and the compensation coefficient is greater than 1.

[0017] In a possible implementation manner, the compensation power is determined in the following manner: the output power of the range extender during the power generation process is acquired; and the compensation power is obtained according to the difference between the first power and the output power.

[0018] In a possible implementation, the range extender power generation control device also includes a third determination module (not shown), which is used to: during the power generation process of the range extender, determine whether the difference between the target SOC and the current SOC is greater than a third preset threshold; if the difference is greater than the third preset threshold, determine the target power generation power of the range extender based on the current SOC and the target SOC; if the difference is less than or equal to the third preset threshold, control the range extender to shut down.

[0019] In a possible implementation, the range extender power generation control device also includes a fourth determination module (not shown), which is used to: determine whether the difference between the target SOC and the current SOC is greater than a fourth preset threshold; if the difference is greater than the fourth preset threshold, start the range extender; if the difference is less than or equal to the fourth preset threshold, do not start the range extender.

[0020] In a third aspect, the present application provides an extended-range vehicle, which uses the range extender power generation control method provided in the first aspect to control the power generation of the range extender.

[0021] In a fourth aspect, the present application provides an electronic device comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory is used to store instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the range extender power generation control method provided in the first aspect.

[0022] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the range extender power generation control method provided in the first aspect.

[0023] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the range extender power generation control method provided in the first aspect.

[0024] The range extender power generation control method, device, equipment, storage medium and program product provided in the present application obtain the current SOC of the battery in the range extender vehicle, determine whether the set conditions for operating at the maximum allowable power generation of the range extender are met according to the current SOC, and if not met, determine the target power generation of the range extender according to the current SOC and the target SOC of the range extender, and further control the power generation of the range extender according to the target power generation. The present application dynamically adjusts the target power generation of the range extender based on the current SOC and the target SOC of the range extender, thereby improving the flexibility of the range extender power generation control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 A schematic diagram of an application scenario provided for an embodiment of the present application;

[0027] Figure 2 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 1 ;

[0028] Figure 3 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 2 ;

[0029] Figure 4 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 3 ;

[0030] Figure 5 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 4 ;

[0031] Figure 6 A schematic diagram of a flow chart of a method for determining compensation power provided in an embodiment of the present application;

[0032] Figure 7 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 5 ;

[0033] Figure 8 A schematic diagram of the structure of a range extender power generation control device provided in one embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application.

[0035] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0037] In the related art, the range extender power generation control methods commonly used in range-extended vehicles include two methods: fixed-point power generation and power following. Among them, fixed-point power generation means that after the range extender in the range-extended vehicle is started, the range extender is controlled to generate electricity at a fixed power point, and the fixed power point can be the working point with the best fuel economy of the range extender. This range extender power generation control method can provide stable power output while maintaining the optimal efficiency range, improving fuel utilization efficiency, and keeping the range extender in a relatively stable working state, which is conducive to controlling the noise and vibration of the vehicle and simplifying the control strategy. However, this method has certain limitations, such as the inability to dynamically adjust the power generation power of the range extender, the inability to adapt to different driving conditions, etc., and there is a problem of low flexibility in power generation control. At the same time, when the SOC of the battery is already very high, the excess power cannot be effectively stored or used, which will lead to energy waste.

[0038] Power following means that after the range extender is started, the power generation of the range extender is adjusted according to the actual power demand of the vehicle to meet the power demand of the vehicle, while keeping the battery SOC fluctuating within a certain range as much as possible. This range extender power generation control method can reduce losses in the energy conversion process, improve the energy utilization efficiency of the entire vehicle, reduce the number and amplitude of battery charging and discharging, and help extend the service life of the battery by adjusting the power generation power of the range extender in real time. However, in some scenarios, frequent adjustments to the power generation may lead to reduced power generation efficiency, especially when the actual power demand of the vehicle changes rapidly. At the same time, the frequent start and stop of the range extender will also increase noise and vibration.

[0039] Based on the problems existing in the related art, the embodiments of the present application dynamically adjust the target power generation power of the range extender through the current SOC of the battery in the range extender and the target SOC of the range extender, thereby improving the flexibility of the power generation control of the range extender.

[0040] In order to better understand the present application, an application scenario involved in an embodiment of the present application is first introduced below.

[0041] Figure 1 A schematic diagram of an application scenario provided by an embodiment of the present application. Figure 1 As shown, the application scenario includes: an extended-range vehicle, which includes a control unit and a sensor.

[0042] Exemplarily, a control unit in an extended-range vehicle, such as a vehicle controller, obtains the current SOC of the battery in the extended-range vehicle, and based on the current SOC, determines whether the extended-range vehicle meets the set conditions for operating at the maximum allowable power generation power of the range extender, and if not met, further determines the target power generation power for controlling the range extender to generate power based on the current SOC and the target SOC of the range extender.

[0043] Exemplarily, sensors in the extended-range vehicle, such as a voltage sensor, a current sensor, and a temperature sensor, obtain the current SOC of the battery in the extended-range vehicle and send the current SOC to the control unit, so that the control unit determines, based on the current SOC, whether the extended-range vehicle meets the set conditions for operating at the maximum allowable power generation power of the range extender, and if not met, further determines the target power generation power for controlling the range extender to generate power based on the current SOC and the target SOC of the range extender.

[0044] The range extender power generation control method provided in the embodiment of the present application is described in detail below with reference to specific embodiments, taking the range extender vehicle in the above application scenario as the execution subject.

[0045] Figure 2 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 1 .like Figure 2 As shown, the specific implementation of the range extender power generation control method may include the following steps:

[0046] S201, obtaining the current SOC of the battery in the extended-range vehicle.

[0047] Exemplarily, the battery may be a power battery.

[0048] Exemplarily, the current SOC may be the actual SOC of the battery while the vehicle is driving.

[0049] Exemplarily, the current SOC may be acquired through a sensor or a battery management system (BMS).

[0050] Exemplarily, the sensor may be a voltage sensor, a current sensor, a temperature sensor, etc.

[0051] S202: Determine, based on the current SOC, whether a set condition for operating at the maximum allowable power generation of the range extender is met.

[0052] Exemplarily, the maximum allowable power generation power of the range extender may be the rated power of the range extender.

[0053] Exemplarily, the maximum allowable power generation of the range extender is less than the difference between the maximum charging power of the battery in the range-extended vehicle and the total power consumption of the vehicle.

[0054] In this step, in a possible implementation, if the current SOC is less than the first preset threshold, it is determined that the setting condition of the maximum allowable power generation of the range extender is met, and the range extender is controlled to generate electricity with the maximum allowable power generation of the range extender; if the current SOC is greater than or equal to the first preset threshold, it is determined that the setting condition of the maximum allowable power generation of the range extender is not met. If it is not met, step S203 is executed.

[0055] Exemplarily, the first preset threshold may be 5%.

[0056] It can be understood that when the current SOC is less than 5%, it means that the current battery power of the extended-range vehicle is extremely low, and the battery needs to be charged quickly to meet the actual power demand of the extended-range vehicle. Therefore, the range extender is controlled to generate electricity at the maximum allowable power of the range extender to achieve high-power charging.

[0057] S203: If not satisfied, determine the target power generation power of the range extender according to the current SOC and the target SOC of the range extender.

[0058] Exemplarily, the target SOC of the range extender may be a preset SOC for the entire vehicle, or an expected SOC of the battery set by the driver, etc.

[0059] For example, the current SOC may be greater than the target SOC, the current SOC may be less than the target SOC, or the current SOC may be equal to the target SOC. The present application does not limit the magnitude relationship between the current SOC and the target SOC.

[0060] It should be noted that in the range extender power generation control method provided in the embodiment of the present application, the size of the target SOC is not limited and can be determined according to actual application requirements.

[0061] S204, controlling the range extender to generate electricity according to the target power generation.

[0062] In the embodiment of the present application, the current SOC of the battery in the range extender is obtained, and according to the current SOC, whether the set condition of operating at the maximum allowable power generation of the range extender is met, and if it is not met, the target power generation of the range extender is determined according to the current SOC and the target SOC of the range extender, and the power generation of the range extender is further controlled according to the target power generation. In the embodiment of the present application, the target power generation of the range extender is dynamically adjusted based on the current SOC and the target SOC of the range extender, so as to improve the flexibility of the power generation control of the range extender.

[0063] Combine the following Figure 3 The specific implementation method of determining the target power generation power of the range extender according to the current SOC and the target SOC of the range extender in step S203 is described in detail.

[0064] Figure 3 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 2 .like Figure 3 As shown, according to the current SOC and the target SOC of the range extender, a specific implementation method of determining the target power generation power of the range extender may include the following steps:

[0065] S301, determining whether the current SOC is less than a first preset threshold, and determining whether the difference between the target SOC and the current SOC is greater than a second preset threshold.

[0066] Exemplarily, the first preset threshold may be 5%.

[0067] For example, the difference between the target SOC and the current SOC can be expressed by the following formula:

[0068] SOCDev=SOCTgt–SOCAct

[0069] Among them, SOCDev represents the difference between the target SOC and the current SOC, SOCTgt represents the target SOC, and SOCAct represents the current SOC.

[0070] Exemplarily, the second preset threshold may be 50%.

[0071] S302: If the current SOC is less than a first preset threshold value, and / or the difference is greater than a second preset threshold value, the maximum allowable power generation of the range extender is determined as the target power generation power.

[0072] In this step, in one possible implementation, if the current SOC is less than the first preset threshold, the maximum allowable power generation of the range extender is determined to be the target power generation; in another possible implementation, if the difference is greater than the second preset threshold, the maximum allowable power generation of the range extender is determined to be the target power generation; in yet another possible implementation, if the current SOC is less than the first preset threshold and the difference is greater than the second preset threshold, the maximum allowable power generation of the range extender is determined to be the target power generation.

[0073] It can be understood that in the range extender power generation control method provided in the embodiment of the present application, when the current SOC is less than the first preset threshold value such as 5%, it means that the current power of the battery in the extended-range vehicle is low and cannot meet the actual power demand during vehicle driving, and the battery needs to be charged quickly. Therefore, by controlling the range extender to generate electricity with the maximum allowable power of the range extender, the battery can be quickly charged, which meets the actual driving conditions of the extended-range vehicle.

[0074] It can be understood that in the range extender power generation control method provided in the embodiment of the present application, when the difference between the target SOC and the current SOC is greater than a second preset threshold value such as 50%, it means that the target SOC and the current SOC are quite different, and it is necessary to quickly charge the battery so that the current SOC can be quickly maintained near the target SOC.

[0075] S303: If the current SOC is greater than or equal to the first preset threshold and the difference is less than or equal to the second preset threshold, determine the target power generation according to the difference.

[0076] It can be understood that when the current SOC is greater than or equal to the first preset threshold, it means that the current power of the battery in the extended-range vehicle is not at a low level, and the range extender can meet the actual power demand of the extended-range vehicle without using the maximum allowable power generation for power generation; when the difference is less than or equal to the second preset threshold, it means that the target SOC and the current SOC are slightly different, and the range extender can quickly maintain the current SOC near the target SOC without using the maximum allowable power generation for power generation.

[0077] In the embodiment of the present application, by determining whether the current SOC is less than a first preset threshold value, and determining whether the difference between the target SOC and the current SOC is greater than a second preset threshold value, and when the current SOC is less than the first preset threshold value, and / or the difference is greater than the second preset threshold value, the maximum allowable power generation of the range extender is determined to be the target power generation, and when the current SOC is greater than or equal to the first preset threshold value, and the difference is less than or equal to the second preset threshold value, the target power generation is determined according to the difference. In the embodiment of the present application, by calibrating the current SOC and the difference between the target SOC and the current SOC, according to the current SOC and the difference between the target SOC and the current SOC, the current power of the battery in the range-extended vehicle is determined to be in a low power condition, and / or when the target SOC and the current SOC differ greatly, the range extender is controlled to generate power at the maximum allowable power generation of the range extender, so as to realize fast charging of the battery, which is in line with the actual working conditions of the vehicle during driving, and can reduce the number of times the battery is charged and discharged, thereby improving the service life of the battery.

[0078] Combine the following Figure 4 , the specific implementation method of determining the target power generation according to the difference in step S303 is described in detail.

[0079] Figure 4 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 3 .like Figure 4 As shown, according to the difference, a specific implementation method of determining the target power generation may include the following steps:

[0080] S401, determining whether the difference is within a preset range.

[0081] Exemplarily, the preset interval may be ±5%.

[0082] Exemplarily, when the target SOC is greater than the current SOC, the difference between the target SOC and the current SOC is greater than 0; when the target SOC is less than the current SOC, the difference between the target SOC and the current SOC is less than 0; when the target SOC is equal to the current SOC, the difference between the target SOC and the current SOC is equal to 0.

[0083] In this step, when the difference is within the preset interval, step S402 is executed; when the difference is not within the preset interval, step S403 is executed.

[0084] S402, determining a target power generation power according to a first power and a second power, wherein the first power is an average power of the total power consumed by the entire vehicle within a first preset time period, and the second power is a compensation power obtained through closed-loop control during a power following control process.

[0085] Exemplarily, the first preset duration may be 3 seconds.

[0086] It should be noted that in the range extender power generation control method provided in the embodiment of the present application, the first preset time length is not limited and can be determined according to actual application requirements.

[0087] Exemplarily, the first power may be used to represent the dynamic target power generation power of the range extender during power following control.

[0088] For example, the average power of the total power consumption of the whole vehicle can be expressed by the following formula:

[0089] Pavg=(P1+P2+…+Pn) / n

[0090] Among them, Pavg represents the average power of the total power consumed by the whole vehicle, and P1, P2 and Pn represent the power consumed by the whole vehicle.

[0091] In this step, in a possible implementation, the sum of the first power and the second power may be determined as the target generated power.

[0092] It can be understood that when the current SOC is greater than the first preset threshold value, and the difference between the target SOC and the current SOC is in the preset interval, it means that the current power of the battery in the extended-range vehicle is not at an extremely low level, and the current SOC is close to the target SOC, that is, the actual power demand of the extended-range vehicle changes little. Under this condition, by adopting the power following control method, the range extender is controlled to generate electricity with the sum of the average power of the total power consumed by the whole vehicle within the first preset time period and the compensation power obtained by closed-loop control during the power following control process. By adjusting the output power of the range extender in real time, the loss in the energy conversion process is reduced, the energy utilization efficiency of the whole vehicle is improved, the number and amplitude of battery charging and discharging are reduced, and the battery service life is extended.

[0093] S403, obtaining a third power, and determining a target power generation power according to the third power and the power generation power of the range extender at the best fuel efficiency, where the third power is the average power of the total power consumed by the entire vehicle within a second preset time period.

[0094] Exemplarily, the optimal fuel efficiency power generation power of the range extender may be a power operating point at which the fuel economy of the range extender is optimal.

[0095] Exemplarily, the optimal fuel efficiency power generation power of the range extender may also be described as the default power generation power of the range extender.

[0096] Exemplarily, the second preset time length may be 10 seconds.

[0097] It should be noted that in the range extender power generation control method provided in the embodiment of the present application, the second preset time length is not limited and can be determined according to actual application requirements.

[0098] Exemplarily, the second preset duration is greater than the first preset duration.

[0099] It can be understood that when the power following power generation control method is used to control the range extender for power generation, the greater the frequency of power change, the closer it is to the vehicle operating condition, that is, the actual total power consumed by the vehicle, and the first preset time is 3s; when the difference between the target SOC and the current SOC is greater than 0, and the power following method is not used to control the range extender for power generation, it is expected that the current SOC can reach the target SOC as soon as possible and be as close as possible to the changing trend of the vehicle operating condition. The second preset time is 10s, and the power changes are relatively slow at this time.

[0100] In the embodiment of the present application, by determining whether the difference is in a preset interval, and when the difference is in the preset interval, according to the average power of the total power of the whole vehicle in the first preset time and the compensation power obtained by closed-loop control during the power following control process, the target power generation power is determined. When the difference is not in the preset interval, the average power of the total power of the whole vehicle in the second preset time is obtained, and the target power generation power is determined according to the average power and the optimal fuel efficiency power generation power of the range extender. In the embodiment of the present application, by setting a preset interval for the difference between the target SOC and the current SOC, and when the difference is in the preset interval, it means that the current SOC is close to the target SOC, that is, the actual power demand of the range-extended vehicle changes little. Under this working condition, by adopting the power following control mode, the range extender is controlled to generate electricity with the sum of the average power of the total power of the whole vehicle in the first preset time and the compensation power obtained by closed-loop control during the power following control process. By adjusting the output power of the range extender in real time, the loss in the energy conversion process is reduced, the energy utilization efficiency of the whole vehicle is improved, the number and amplitude of battery charging and discharging are reduced, and the service life of the battery is extended.

[0101] Combine the following Figure 5 , a specific implementation method for determining the target power generation power according to the third power and the optimal fuel efficiency power generation power of the range extender in step S403 is described in detail.

[0102] Figure 5 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 4 .like Figure 5 As shown, according to the third power and the optimal fuel efficiency power generation power of the range extender, a specific implementation method of determining the target power generation power may include the following steps:

[0103] S501, determining whether the best fuel efficiency power generation power is greater than the third power.

[0104] In this step, when the power generated by the best fuel efficiency is greater than the third power, step S502 is executed; when the power generated by the best fuel efficiency is less than or equal to the third power, step S503 is executed.

[0105] S502, determining the optimal fuel efficiency power generation as the target power generation.

[0106] It can be understood that under this operating condition, by controlling the range extender to generate electricity through the fixed-point power generation control method, that is, controlling the range extender to generate electricity at the optimal fuel efficiency power, it can provide the vehicle with stable power output while maintaining the optimal efficiency range and improving fuel utilization efficiency.

[0107] S503: Determine that the product of the compensation coefficient and the third power is the target power generation power, and the compensation coefficient is greater than 1.

[0108] Exemplarily, the size of the compensation coefficient may be determined according to the difference between the target SOC and the current SOC, that is, when the difference between the target SOC and the current SOC is different, the compensation coefficient is also different.

[0109] In one possible implementation, when the difference between the target SOC and the current SOC is greater than 30% and less than or equal to 50%, the compensation coefficient k=2; when the difference between the target SOC and the current SOC is greater than 10% and less than or equal to 30%, the compensation coefficient k=1.5; when the difference between the target SOC and the current SOC is greater than 0 and less than or equal to 10%, the compensation coefficient k=1.2.

[0110] Exemplarily, when the difference between the target SOC and the current SOC is greater than 50% and less than or equal to 0, the compensation coefficient k may be 1. It should be noted that when the compensation coefficient is 1, the target power generation of the range extender is not compensated.

[0111] In the embodiment of the present application, by determining whether the optimal fuel efficiency power generation is greater than the third power, and when the optimal fuel efficiency power generation is greater than the third power, determining the optimal fuel efficiency power generation as the target power generation, and when the optimal fuel efficiency power generation is less than or equal to the third power, determining the product of the compensation coefficient and the third power as the target power generation, the target SOC is quickly approached and maintained near the target SOC, which is in line with actual driving conditions, reduces the number of battery charge and discharge times, and thus extends the battery life.

[0112] Optionally, in the range extender power generation control method provided in an embodiment of the present application, the compensation power is determined in the following manner: obtaining the output power of the range extender during the power generation process; and obtaining the compensation power based on the difference between the first power and the output power.

[0113] Exemplarily, the output power may be the actual power generated by the generator.

[0114] In a possible implementation, the difference between the first power and the output power is used as an error parameter of PID control to obtain the compensation power.

[0115] In the range extender power generation control method provided in the embodiment of the present application, when the difference between the target SOC and the current SOC is in a preset interval, the power generation control method of the range extender vehicle adopts a power following power generation control method. In this power generation control method, PID closed-loop control is performed on the target power generation power of the range extender to improve the control accuracy, thereby ensuring SOC stability, reducing the number of battery charge and discharge times, and extending battery life.

[0116] Figure 6 This is a flow chart of a method for determining compensation power provided in an embodiment of the present application. Figure 6 As shown, the total power consumption of the whole vehicle is obtained, and the average power of the total power consumption of the whole vehicle within the first preset time period is used as the original target power generation power of the range extender, that is, the first power. The actual power generation power of the generator of the range extender when generating electricity based on the target power generation power, that is, the sum of the first power and the compensation power, that is, the output power, is obtained, and the difference between the first power and the output power is used as the error parameter of the PID control to perform PID adjustment to obtain the compensation power, and the sum of the compensation power and the first power continues to be used as the target power generation power of the range extender.

[0117] Optionally, the range extender power generation control method provided in the embodiment of the present application may further include: during the power generation process of the range extender, determining whether the difference between the target SOC and the current SOC is greater than a third preset threshold; if the difference is greater than the third preset threshold, determining the target power generation power of the range extender based on the current SOC and the target SOC; if the difference is less than or equal to the third preset threshold, controlling the range extender to shut down.

[0118] Exemplarily, the third preset threshold may be -5%.

[0119] It should be noted that in the range extender power generation control method provided in the embodiment of the present application, the size of the third preset threshold is not limited and can be determined according to actual application requirements.

[0120] The specific implementation method of determining the target power generation power of the range extender according to the current SOC and the target SOC is similar to the above, and will not be repeated here.

[0121] It can be understood that when the difference between the target SOC and the current SOC is less than or equal to the third preset threshold, it means that the current SOC is greater than the target SOC and the current SOC is not close to the target SOC. Under this operating condition, the current power of the battery in the extended-range vehicle can meet the actual power demand of the vehicle, and the range extender is not required to generate electricity for the battery. Therefore, under this operating condition, the range extender is controlled to shut down.

[0122] Optionally, the range extender power generation control method provided in the embodiment of the present application may further include: determining whether the difference between the target SOC and the current SOC is greater than a fourth preset threshold; if the difference is greater than the fourth preset threshold, starting the range extender; if the difference is less than or equal to the fourth preset threshold, not starting the range extender.

[0123] Exemplarily, the fourth preset threshold may be 0.

[0124] It should be noted that in the range extender power generation control method provided in the embodiment of the present application, the size of the fourth preset threshold is not limited and can be determined according to actual application requirements.

[0125] In this step, a possible implementation method may be: determining whether the target SOC is greater than the current SOC, and starting the range extender when the target SOC is greater than the current SOC; and not starting the range extender when the target SOC is less than or equal to the current SOC.

[0126] In summary, Figure 7 Schematic diagram of the process of the range extender power generation control method provided in the embodiment of the present application Figure 5 .like Figure 7 As shown, the specific implementation of the range extender power generation control method may include the following steps:

[0127] S701, obtaining the current SOC of the battery in the extended-range vehicle.

[0128] S702, determining whether a difference between a target SOC and a current SOC of the range extender is greater than a fourth preset threshold.

[0129] In this step, if the difference is greater than the fourth preset threshold, step S703 is executed; if the difference is less than or equal to the fourth preset threshold, step S704 is executed.

[0130] S703, start the range extender.

[0131] S704, do not start the range extender.

[0132] S705 , determining whether a set condition for operating at the maximum allowable power generation of the range extender is met based on the current SOC.

[0133] In this step, if the conditions are met, step S706 is executed; if not, step S707 is executed.

[0134] S706: Determine the maximum allowable power generation of the range extender as the target power generation power.

[0135] S707, determining whether the current SOC is less than a first preset threshold, and determining whether the difference between the target SOC and the current SOC is greater than a second preset threshold.

[0136] S708: If the current SOC is less than the first preset threshold, and / or the difference is greater than the second preset threshold, the maximum allowable power generation of the range extender is determined as the target power generation.

[0137] S709: If the current SOC is greater than or equal to the first preset threshold, and the difference is less than or equal to the second preset threshold, determine whether the difference is within a preset range.

[0138] In this step, if the difference is within the preset interval, step S710 is executed; if the difference is not within the preset interval, step S711 is executed.

[0139] S710, determining a target power generation power according to a first power and a second power, wherein the first power is an average power of the total power consumed by the entire vehicle within a first preset time period, and the second power is a compensation power obtained through closed-loop control during a power following control process.

[0140] S711, obtaining a third power, and determining whether the optimal fuel efficiency power generation power is greater than the third power.

[0141] In this step, if the best fuel efficiency power generation is greater than the third power, step S712 is executed; if the best fuel efficiency power generation is less than or equal to the third power, step S713 is executed.

[0142] S712, determining the optimal fuel efficiency power generation as the target power generation.

[0143] S713, determining the product of the compensation coefficient and the third power as the target generated power.

[0144] In the embodiments of the present application, the specific implementation method of each step is similar to that described above and will not be repeated here.

[0145] Exemplarily, the target power generation of the range extender, the optimal fuel efficiency power generation of the range extender, the first power, the target power generation of the range extender after compensation by the compensation coefficient, that is, the product of the compensation coefficient and the third power, and the compensation power are all less than or equal to the maximum allowable power generation of the range extender.

[0146] In summary, compared with the related technologies, the fixed-point power generation control method has the problems of low flexibility and inability to dynamically adjust the power generation power, and the power following power generation control method has the problems of frequent adjustment of the target power generation power, resulting in reduced power generation efficiency, and frequent starting and stopping of the range extender increasing noise and vibration. In the range extender power generation control method provided in the embodiment of the present application, by combining fixed-point power generation control and power following control, when the current SOC is not close to the target SOC, when the total power consumption of the whole vehicle is small, fixed-point power generation control is adopted, and when the total power consumption of the whole vehicle is greater than the optimal fuel efficiency power generation power of the range extender, the target power generation power compensated by the compensation coefficient is adopted; when the current SOC is close to the target SOC, power following control is adopted, which can be specifically a power closed-loop control, so as to maintain SOC stability and improve the smooth operation of the range extender. The range extender power generation control method provided in the embodiment of the present application can avoid frequent conversion of the power generation operating point of the range extender, make the range extender operate at the power point with the best fuel economy as much as possible, and make the current SOC quickly approach and maintain near the target SOC, which is in line with the actual driving conditions of the extended-range vehicle, reduces the number of battery charge and discharge times, and thus extends the battery life.

[0147] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0148] Figure 8 This is a schematic diagram of the structure of a range extender power generation control device provided in one embodiment of the present application. Figure 8 As shown, the range extender power generation control device 80 includes an acquisition module 810 , a first determination module 820 , a second determination module 820 and a control module 830 .

[0149] Wherein, the acquisition module 810 is used to obtain the current SOC of the battery in the extended-range vehicle;

[0150] A first determination module 820 is used to determine whether a set condition for operating at a maximum allowable power generation of the range extender is met according to the current SOC;

[0151] A second determination module 830 is used to determine the target power generation power of the range extender according to the current SOC and the target SOC of the range extender when it is determined that the set condition is not sufficient to operate at the maximum allowable power generation power of the range extender;

[0152] The control module 840 is used to control the range extender to generate electricity according to the target power generation.

[0153] In one possible implementation, the second determination module 830 is specifically used to: determine whether the current SOC is less than a first preset threshold, and determine whether the difference between the target SOC and the current SOC is greater than a second preset threshold; if the current SOC is less than the first preset threshold, and / or the difference is greater than the second preset threshold, then determine the maximum allowable power generation of the range extender as the target power generation; if the current SOC is greater than or equal to the first preset threshold, and the difference is less than or equal to the second preset threshold, then determine the target power generation based on the difference.

[0154] In one possible implementation, the second determination module 830 is also used to: determine whether the difference is within a preset interval; if the difference is within the preset interval, determine the target power generation power based on the first power and the second power, the first power being the average power of the total power consumption of the whole vehicle within the first preset time period, and the second power being the compensation power obtained through closed-loop control during the power following control process; if the difference is not within the preset interval, obtain the third power, and determine the target power generation power based on the third power and the optimal fuel efficiency power generation power of the range extender, the third power being the average power of the total power consumption of the whole vehicle within the second preset time period.

[0155] In one possible implementation, the second determination module 830 is also used to: determine whether the optimal fuel efficiency power generation is greater than the third power; if the optimal fuel efficiency power generation is greater than the third power, determine the optimal fuel efficiency power generation as the target power generation; if the optimal fuel efficiency power generation is less than or equal to the third power, determine the product of the compensation coefficient and the third power as the target power generation, and the compensation coefficient is greater than 1.

[0156] In a possible implementation manner, the compensation power is determined in the following manner: the output power of the range extender during the power generation process is acquired; and the compensation power is obtained according to the difference between the first power and the output power.

[0157] In a possible implementation, the range extender power generation control device also includes a third determination module (not shown), which is used to: during the power generation process of the range extender, determine whether the difference between the target SOC and the current SOC is greater than a third preset threshold; if the difference is greater than the third preset threshold, determine the target power generation power of the range extender based on the current SOC and the target SOC; if the difference is less than or equal to the third preset threshold, control the range extender to shut down.

[0158] In a possible implementation, the range extender power generation control device also includes a fourth determination module (not shown), which is used to: determine whether the difference between the target SOC and the current SOC is greater than a fourth preset threshold; if the difference is greater than the fourth preset threshold, start the range extender; if the difference is less than or equal to the fourth preset threshold, do not start the range extender.

[0159] The range extender power generation control device provided in this embodiment can be used to execute the method steps of the above-mentioned range extender power generation control method embodiment. The specific implementation method and technical effect are similar and will not be repeated here.

[0160] Fig. 9 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application. Fig. 9 As shown, the electronic device 90 includes at least one processor 910 and a memory 920. Optionally, the electronic device 90 also includes a communication interface 930. The processor 910, the memory 920 and the communication interface 930 are connected via a system bus 940.

[0161] In a specific implementation process, at least one processor 910 executes the computer execution instructions stored in the memory 920, so that at least one processor 910 executes the above method.

[0162] The specific implementation process of the processor 910 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0163] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0164] The memory may include a high-speed memory (Random Access Memory, referred to as RAM), and may also include a non-volatile memory (Non-volatile Memory, referred to as NVM), such as at least one disk memory.

[0165] The system bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The system bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the system bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0166] An embodiment of the present application also provides an extended-range vehicle, which uses the range extender power generation control method provided in the above embodiment to control the range extender power generation.

[0167] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0168] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0169] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0170] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0171] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0172] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0173] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0174] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0175] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0176] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A range extender power generation control method, characterized in that: include: Get the current state of charge (SOC) of the battery in the extended-range vehicle; determining, according to the current SOC, whether a set condition for operating at a maximum allowable power generation of the range extender is met; If not, determining a target power generation power of the range extender according to the current SOC and the target SOC of the range extender; The range extender is controlled to generate electricity according to the target power generation.

2. The range extender power generation control method according to claim 1, characterized in that: The determining the target power generation power of the range extender according to the current SOC and the target SOC includes: Determining whether the current SOC is less than a first preset threshold, and determining whether a difference between the target SOC and the current SOC is greater than a second preset threshold; If the current SOC is less than the first preset threshold, and / or the difference is greater than the second preset threshold, determining the maximum allowable power generation of the range extender as the target power generation; If the current SOC is greater than or equal to the first preset threshold, and the difference is less than or equal to the second preset threshold, the target power generation power is determined according to the difference.

3. The range extender power generation control method according to claim 2, characterized in that: Determining the target power generation according to the difference includes: Determining whether the difference is within a preset range; If the difference is within the preset interval, the target power generation power is determined according to the first power and the second power, wherein the first power is the average power of the total power consumption of the whole vehicle within the first preset time period, and the second power is the compensation power obtained by closed-loop control during the power following control process; If the difference is not within the preset interval, a third power is obtained, and the target power generation power is determined according to the third power and the optimal fuel efficiency power generation power of the range extender, where the third power is the average power of the total power consumption of the whole vehicle within the second preset time period.

4. The range extender power generation control method according to claim 3, characterized in that: The determining the target power generation power according to the third power and the optimal fuel efficiency power generation power of the range extender comprises: determining whether the optimal fuel efficiency power generation power is greater than the third power; If the optimal fuel efficiency power generation is greater than the third power, determining the optimal fuel efficiency power generation as the target power generation; If the optimal fuel efficiency power generation power is less than or equal to the third power, the product of the compensation coefficient and the third power is determined to be the target power generation power, and the compensation coefficient is greater than 1.

5. The range extender power generation control method according to claim 3, characterized in that: The compensation power is determined in the following manner: Obtaining the output power of the range extender during the power generation process; The compensation power is obtained according to a difference between the first power and the output power.

6. The range extender power generation control method according to any one of claims 1 to 5, characterized in that: Also includes: During the power generation process of the range extender, determining whether a difference between the target SOC and the current SOC is greater than a third preset threshold; If the difference is greater than the third preset threshold, determining the target power generation power of the range extender according to the current SOC and the target SOC; If the difference is less than or equal to the third preset threshold, the range extender is controlled to shut down.

7. The range extender power generation control method according to any one of claims 1 to 5, characterized in that: Also includes: determining whether a difference between the target SOC and the current SOC is greater than a fourth preset threshold; If the difference is greater than the fourth preset threshold, starting the range extender; If the difference is less than or equal to the fourth preset threshold, the range extender is not started.

8. A range extender power generation control device, characterized in that: include: An acquisition module, used to obtain the current state of charge SOC of the battery in the extended-range vehicle; A first determination module, configured to determine, according to the current SOC, whether a set condition for operating at a maximum allowable power generation of the range extender is met; A second determination module is used to determine the target power generation power of the range extender according to the current SOC and the target SOC of the range extender when it is determined that the set condition is not sufficient to operate at the maximum allowable power generation power of the range extender; A control module is used to control the range extender to generate electricity according to the target power generation.

9. An electronic device, characterized in that: include: at least one processor; and a memory communicatively coupled to the at least one processor; The memory is used to store instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

11. A computer program product, characterized in that include: A computer program, which, when executed by a processor, implements the method according to any one of claims 1 to 7.

Images