Control method, device, equipment and medium for whole vehicle driving when power battery is limited

Abstract

The invention discloses a control method, device, equipment and medium for whole vehicle running when a power battery is limited, and the method comprises the steps that the actual output power of a generator and the actual demand power of a driving motor are obtained, and the actual electricity utilization power of a target load is determined based on the actual output power and the actual demand power; and then the target load is controlled to operate based on the actual electricity utilization power. Namely, the actual output power of the generator can be controlled to be greater than the actual demand power according to the actual demand power of the driving motor, and at the moment, when the driving motor cannot completely consume the actual output power of the generator, the actual output power can be provided for the target load for consumption, so that excessive power of the generator cannot be caused to charge the power battery. And when the actual demand power of the driving motor is increased, on the basis that the actual output power of the generator is greater than the actual demand power of the driving motor, the generator can make a response more quickly, and the demand of increasing the demand power of the driving motor is met.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle control, and particularly to a control method, device, equipment and medium for vehicle driving when the power battery is limited. Background Technique

[0002] With the development of new energy vehicle technology, range-extended electric vehicles have gradually begun to occupy the mainstream market of automobile sales. Compared with pure electric vehicles, range-extended electric vehicles can not only supply power to the drive motor by using the power battery, but also generate electricity through the engine in series with the generator to provide power for the drive motor to meet the vehicle drive power demand.

[0003] When the charge and discharge capacity of the power battery is limited, for example, when the range-extended electric vehicle is in a low-temperature condition, at this time, the power battery cannot be used to discharge power to the drive motor to drive the vehicle. At this time, the range-extended electric vehicle can control the engine to run, drive the generator to run in series to generate electricity, and the electricity generated by the generator is used by the drive motor to drive the vehicle.

[0004] However, since the engine response requires a certain amount of time and there may be deviations in the accuracy of the output torque, if the output torque of the engine is too small, it will cause a slow response to the vehicle power demand and affect the driving experience; if the output torque of the engine is too large, in the case of limited charging capacity of the power battery, it may cause overcharging of the battery and damage the power battery. Summary of the Invention

[0005] In view of this, the present application provides a control method, device, equipment and medium for vehicle driving when the power battery is limited, so as to improve the response speed to the vehicle power demand and prevent overcharging of the power battery when the charge and discharge capacity of the power battery is limited.

[0006] In a first aspect, the present application provides a control method for vehicle driving when the power battery is limited. The method is applied to the working condition where the power battery of the vehicle is limited, and the method includes:

[0007] Obtain the actual output power of the generator and the actual demand power of the drive motor, and the actual output power is greater than the actual demand power;

[0008] Based on the actual output power and the actual demand power, determine the actual power consumption of the target load;

[0009] Control the operation of the target load based on the actual power consumption.

[0010] In a possible implementation, the determining the actual power consumption of the target load based on the actual output power and the actual demand power includes:

[0011] Obtain the actual charging power when the power battery is limited;

[0012] Based on the actual output power, the actual required power, and the actual charging power, determine the actual power consumption.

[0013] In a possible implementation, the method further includes:

[0014] Obtain the growth value of the required power of the drive motor;

[0015] Determine the growth value of the output power of the generator, where the growth value of the output power is greater than the growth value of the required power;

[0016] Based on the growth value of the output power and the maximum power consumption of the target load, determine the target growth value of the output power of the generator;

[0017] Adjust the actual output power of the generator to increase the target growth value of the output power.

[0018] In a possible implementation, the determining the target growth value of the output power of the generator based on the growth value of the output power and the maximum power consumption of the target load includes:

[0019] Based on the original maximum charging power of the power battery and the actual charging power, determine the target power difference parameter;

[0020] Based on the correlation relationship among the power difference parameter, the proportional term coefficient, and the integral term coefficient, determine the target proportional term coefficient and the target integral term coefficient associated with the target power difference parameter;

[0021] Based on the original maximum charging power, the power difference parameter, the target proportional term coefficient, and the target integral term coefficient, determine the virtual charging power of the power battery;

[0022] Based on the growth value of the output power, the maximum power consumption, and the virtual charging power, determine the target growth value of the output power.

[0023] In a possible implementation, the method further includes:

[0024] Obtain the maximum charging current of the power battery;

[0025] When the actual charging current of the power battery is greater than the maximum charging current, determine the target square difference of the current between the actual charging current and the maximum charging current;

[0026] According to the correlation relationship between the square difference of the current and the power attenuation coefficient, determine the target power attenuation coefficient associated with the target square difference of the current;

[0027] Determine the attenuation virtual charging power of the power battery based on the product of the target power attenuation coefficient and the virtual charging power;

[0028] Adjust the target output power growth value based on the output power growth value, the maximum power consumption, and the attenuation virtual charging power.

[0029] In a possible implementation manner, the adjusting the actual output power of the generator to increase the target output power growth value includes:

[0030] Determine the predicted output power growth value of the engine based on the target output power growth value and a preset efficiency, where the preset efficiency represents the ratio between the output power of the engine and the output power of the generator;

[0031] Adjust the rotational speed and / or output torque of the engine based on the predicted output power growth value;

[0032] Control the engine to drive the generator to operate at the adjusted rotational speed and / or adjusted output torque, so as to adjust the actual output power of the generator to increase the target output power growth value.

[0033] In a possible implementation manner, the obtaining the required power growth value of the drive motor includes:

[0034] Determine the required torque growth value of the drive motor according to the throttle pedal parsing;

[0035] Determine the required power growth value based on the required torque growth value and the rotational speed of the drive motor.

[0036] In a second aspect, the present application provides a control device for vehicle running when the power battery is limited. The device is applied to the working condition where the power battery of the vehicle is limited. The device includes:

[0037] An obtaining unit, configured to obtain the actual output power of the generator and the actual required power of the drive motor, where the actual output power is greater than the actual required power;

[0038] A determining unit, configured to determine the actual power consumption of the target load based on the actual output power and the actual required power;

[0039] A control unit, configured to control the operation of the target load based on the actual power consumption.

[0040] In a possible implementation manner, the determining unit is specifically configured to obtain the actual charging power when the power battery is limited; determine the actual power consumption based on the actual output power, the actual required power, and the actual charging power.

[0041] In a possible implementation, the obtaining unit is further configured to obtain a demand power growth value of the drive motor;

[0042] The determining unit is further configured to determine an output power growth value of the generator, where the output power growth value is greater than the demand power growth value; and determine a target output power growth value of the generator based on the output power growth value and the maximum power consumption of the target load;

[0043] The control unit is further configured to adjust the actual output power of the generator to increase the target output power growth value.

[0044] In a possible implementation, the determining unit is specifically configured to determine a target power difference parameter based on the original maximum charging power and the actual charging power of the power battery; determine a target proportional term coefficient and a target integral term coefficient associated with the target power difference parameter based on the correlation between the power difference parameter, the proportional term coefficient, and the integral term coefficient; determine a virtual charging power of the power battery based on the original maximum charging power, the power difference parameter, the target proportional term coefficient, and the target integral term coefficient; and determine the target output power growth value based on the output power growth value, the maximum power consumption, and the virtual charging power.

[0045] In a possible implementation, the obtaining unit is further configured to obtain the maximum charging current of the power battery;

[0046] The determining unit is further configured to determine a target current square difference between the actual charging current and the maximum charging current when the actual charging current of the power battery is greater than the maximum charging current; determine a target power attenuation coefficient associated with the target current square difference according to the correlation between the current square difference and the power attenuation coefficient; and determine a damped virtual charging power of the power battery based on the product of the target power attenuation coefficient and the virtual charging power;

[0047] The control unit is further configured to adjust the target output power growth value based on the output power growth value, the maximum power consumption, and the damped virtual charging power.

[0048] In a possible implementation manner, the control unit is specifically configured to determine a predicted output power increase value of the engine based on the target output power increase value and a preset efficiency, where the preset efficiency represents the ratio between the output power of the engine and the output power of the generator; adjust the rotational speed and / or the output torque of the engine based on the predicted output power increase value; control the engine to drive the generator to operate at the adjusted rotational speed and / or the adjusted output torque, so as to adjust the actual output power of the generator to increase by the target output power increase value.

[0049] In a possible implementation manner, the obtaining unit is specifically configured to determine a required torque increase value of the drive motor according to the throttle pedal analysis; determine a required power increase value based on the required torque increase value and the rotational speed of the drive motor.

[0050] In a third aspect, the present application provides a control device for a vehicle to travel when a power battery is limited. The device includes: a memory and a processor;

[0051] The memory is used to store relevant program codes;

[0052] The processor is used to call the program codes to execute the control method for a vehicle to travel when a power battery is limited according to any one of the implementation manners in the first aspect above.

[0053] In a fourth aspect, the present application provides a computer-readable storage medium, which is used to store a computer program, and the computer program is used to execute the control method for a vehicle to travel when a power battery is limited according to any one of the implementation manners in the first aspect above.

[0054] Thus, the present application has the following beneficial effects:

[0055] In the above implementation manner of the present application, when the power battery of the vehicle is limited, the vehicle can be controlled to travel normally in the following manner. Obtain the actual output power of the generator and the actual required power of the drive motor, determine the actual power consumption of the target load based on the actual output power and the actual required power, and then control the target load to operate based on the actual power consumption. That is, according to the actual required power of the drive motor, control the actual output power of the generator to be greater than the actual required power. At this time, when the drive motor cannot completely consume the actual output power of the generator, it can be provided to the target load for consumption, so it will not cause the extra power of the generator to charge the power battery. And when the actual required power of the drive motor increases, on the basis that the actual output power of the generator is greater than the actual required power of the drive motor, the generator can respond faster to meet the request of the drive motor to increase the required power. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings described below are only some embodiments provided in the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0057] Figure 1 It is a flowchart of a control method for vehicle driving when the power battery is limited in the embodiments of the present application;

[0058] Figure 2 It is a schematic structural diagram of a vehicle system provided in the embodiments of the present application;

[0059] Figure 3 It is a schematic diagram of a control device for vehicle driving when the power battery is limited in the embodiments of the present application;

[0060] Figure 4 It is a schematic diagram of a control device for vehicle driving when the power battery is limited in the embodiments of the present application. Specific embodiments

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. The described embodiments are only exemplary implementation manners of the present application, not all implementation manners. Those skilled in the art can obtain other embodiments without creative labor in combination with the embodiments of the present application, and these embodiments are also within the protection scope of the present application.

[0062] In addition to using the power battery to supply power to the drive motor, the range-extended electric vehicle can also generate electricity by the engine in series with the generator to provide power for the drive motor to meet the vehicle drive power demand. That is, when the battery power is sufficient, the power battery supplies power to the drive motor to provide the vehicle drive power demand, and at this time the engine does not participate in the work. When the charge and discharge capacity of the power battery is limited, for example, when the range-extended electric vehicle is in a low-temperature condition, at this time, it is impossible to use the power battery to supply power to the drive motor to drive the vehicle. At this time, the range-extended electric vehicle can control the engine to run, and the engine drives the generator to run in series to generate electricity, and the electricity generated by the generator is used by the drive motor to drive the vehicle.

[0063] However, since the response of the engine requires a certain time and there may be deviations in the accuracy of the output torque, if the output torque of the engine is too small, it will lead to a slow speed in responding to the vehicle power demand and affect the driving experience; if the output torque of the engine is too large, in the case of limited charging capacity of the power battery, it may cause overcharging of the battery and damage the power battery.

[0064] Based on this, the embodiments of the present application provide a control method for the vehicle to travel when the power battery is limited, so as to improve the speed of responding to the power demand of the vehicle when the charging and discharging capacity of the power battery is limited, and prevent the power battery from overcharging. Specifically, when the power battery of the vehicle is limited, the vehicle can be controlled to travel normally in the following manner: obtain the actual output power of the generator and the actual required power of the drive motor, determine the actual power consumption of the target load based on the actual output power and the actual required power, and then control the operation of the target load based on the actual power consumption. That is, according to the actual required power of the drive motor, the actual output power of the generator can be controlled to be greater than the actual required power. At this time, when the drive motor cannot fully consume the actual output power of the generator, it can be provided to the target load for consumption, so it will not cause the excess power of the generator to charge the power battery. And when the actual required power of the drive motor increases, on the basis that the actual output power of the generator is greater than the actual required power of the drive motor, the generator can respond faster to meet the request for increasing the required power of the drive motor.

[0065] To facilitate the understanding of the technical solutions provided by the embodiments of the present application, the following will be specifically introduced with reference to the accompanying drawings.

[0066] See Figure 1 , Figure 1 which is a flowchart of a control method for the vehicle to travel when the power battery is limited provided by the embodiments of the present application.

[0067] This method can be executed by the control device of the vehicle. For example, the control device can be a vehicle control unit (VCU). This method can include the following steps:

[0068] S101: Obtain the actual output power of the generator and the actual required power of the drive motor.

[0069] In the embodiments of the present application, in order to enable the generator to respond to the required power of the drive motor as soon as possible, the actual output power of the generator can be controlled to be greater than the actual required power, so that when the actual required power increases, the generator can grow to the required power that the drive motor needs to grow faster. Since the charging capacity of the power battery is limited, the operation of the target load can be controlled to consume the output power of the generator that the drive motor has not consumed.

[0070] Therefore, when controlling the operation of the target load, the actual output power of the generator and the actual required power of the drive motor can be obtained.

[0071] In a possible implementation, during the initial starting stage of the whole vehicle, the target required torque of the drive motor can be determined by parsing the accelerator pedal. Then, the rotational speed of the drive motor is obtained, and based on the target required torque and rotational speed of the drive motor, the target required power of the drive motor is determined. For example, the target required power can be determined according to the product of the target required torque and the rotational speed.

[0072] After determining the target required power of the drive motor, the target output power of the generator can be determined according to this target required power, and the target output power of the generator is made greater than the target required power of the drive motor, so as to meet the requirement for the drive motor to drive the whole vehicle to travel.

[0073] In a possible implementation, since the target output power of the generator is greater than the target required power of the drive motor, and the charging capacity of the power battery is limited, at this time, the target load can be controlled to operate to consume the target output power of the generator. For example, the target load can be components such as the heater PTC of the whole vehicle. Based on this, when determining the target output power of the generator according to the target required power, the maximum power consumption of the target load can be obtained, and then according to the sum of the target required power and the maximum power consumption, the target output power of the generator is determined, so that the target output power is less than the sum of the target required power and the maximum power consumption, and greater than the target required power of the drive motor.

[0074] When the output power of the generator meets the required power of the drive motor, the drive motor can be controlled to operate to drive the whole vehicle to travel, and subsequently, the actual required power of the drive motor during operation and the actual output power of the generator during operation can be obtained.

[0075] In a possible implementation, the generator can be made to generate electricity by controlling the engine to operate. Specifically, after determining the target output power of the generator, the target output power of the engine can be determined according to the transmission ratio between the output power of the engine and the output power of the generator, that is, the preset efficiency. Then, the current rotational speed and output torque of the engine can be obtained, and the rotational speed and / or output torque of the engine are adjusted according to the target output power of the engine to control the output power of the engine to reach the target output power. That is, the rotational speed of the engine can be adjusted only, or the output torque of the engine can be adjusted only, or the rotational speed and output torque of the engine can be adjusted simultaneously.

[0076] For specific reference, see Figure 2As shown in the figure, it is a schematic structural diagram of a vehicle system provided by an embodiment of the present application. The vehicle system may include an engine 201, a generator 202, a power battery 203, a drive motor 204, a target load PTC 205, and a drive mechanism 206. When the control device controls the engine 201 to operate, the engine 201 drives the generator 202 to operate in series to generate electricity. The power output by the generator 202 can be used by the drive motor 204, the power battery 203, and the PTC 205. The drive motor 204 drives the vehicle to travel through the drive mechanism 206.

[0077] S102: Based on the actual output power and the actual required power, determine the actual power consumption of the target load.

[0078] During the vehicle driving process, when the actual output power of the generator and the actual required power of the drive motor are obtained, the actual power consumption of the target load can be determined according to the difference between the actual output power and the actual required power.

[0079] S103: Control the operation of the target load based on the actual power consumption.

[0080] When the actual power consumption of the target load is determined, the operation of the target load can be controlled based on the actual power consumption. In this way, the output power of the generator will not charge the power battery, resulting in overcharging of the power battery.

[0081] Through the method provided by the embodiment of the present application, according to the actual required power of the drive motor, the actual output power of the generator can be controlled to be greater than the actual required power. At this time, the drive motor cannot completely consume the actual output power of the generator, and the actual output power of the generator can be provided for the target load to consume. Therefore, it will not cause the excess output power of the generator to charge the power battery. When the actual required power of the drive motor increases, on the basis that the actual output power of the generator is greater than the actual required power of the drive motor, the generator can respond faster to meet the request for increasing the required power of the drive motor.

[0082] During the vehicle driving process, when the required power of the drive motor increases, it is also necessary to dynamically adjust the output power of the generator to meet the power demand for the drive motor to drive the vehicle. In a possible implementation manner, the growth value of the required torque of the drive motor can be determined by parsing the accelerator pedal. Then, the rotational speed of the drive motor is obtained, and according to the growth value of the required torque and the rotational speed of the drive motor, the growth value of the required power of the drive motor is determined.

[0083] After determining the increased value of the required power of the drive motor, the increased value of the target output power of the generator can be determined according to the increased value of the required power and the maximum power consumption of the target load, and the actual output power of the generator can be adjusted to increase by the increased value of the target output power. Among them, when determining the increased value of the target output power, it is necessary to control the actual output power of the generator after adjustment to be less than the sum of the actual required power of the drive motor after increase and the maximum power consumption of the target load, and greater than the actual required power of the drive motor after increase. In this way, it can not only meet the power increase requirement of the drive motor, but also enable the part of the actual output power of the generator that is greater than the actual required power of the drive motor to be consumed by the target load, preventing overcharging of the power battery.

[0084] According to the above embodiments, it can be known that the engine can be controlled to drive the generator to operate to realize the power generation of the generator. Therefore, after determining the increased value of the target output power of the generator, the increased value of the predicted output power of the engine can be determined according to the increased value of the target output power and the preset efficiency, that is, the transmission ratio between the output power of the engine and the output power of the generator. Then, based on the increased value of the predicted output power, the engine speed and / or output torque can be adjusted to control the engine to drive the generator to operate at the adjusted engine speed and / or adjusted output torque, so that the actual output power of the generator can be adjusted to increase by the increased value of the target output power. That is to say, the control device can only adjust the engine speed, or only adjust the output torque of the engine, or adjust the engine speed and output torque at the same time.

[0085] In the above embodiments, it is based on the condition that the power battery cannot be charged. In a possible implementation manner, when the charging capacity of the power battery is limited, it can also receive a certain charging power. That is, when the generator outputs power, it can be used by the drive motor, the power battery and the target load. At this time, a small part of the actual output power of the generator can be controlled to be given to the power battery, that is, the power battery is charged with a small power. In this way, during the driving of the whole vehicle, the actual power consumption that can be consumed by the target load can be determined by subtracting the actual required power of the drive motor and the actual power consumption of the power battery from the actual output power of the generator, so as to control the target load to operate at the actual power consumption.

[0086] Similarly, when the required power of the drive motor increases, the power that the power battery can consume can also be considered to determine the increased output power of the generator. In one possible implementation, the target power difference parameter can be determined based on the original maximum charging power and the actual charging power of the power battery. Then, based on the correlation relationship among the power difference parameter, the proportional term coefficient, and the integral term coefficient, the target proportional term coefficient and the target integral term coefficient associated with the target power difference parameter are determined. Among them, the correlation relationship among the power difference parameter, the proportional term coefficient, and the integral term coefficient can be pre-determined and stored in the form of a table or the like.

[0087] Based on the original maximum charging power, the power difference parameter, the target proportional term coefficient, and the target integral term coefficient, the virtual charging power of the power battery is determined. Optionally, the proportional term parameter can be obtained by multiplying the power difference parameter by the target proportional term coefficient, the integral term parameter can be obtained by multiplying the power difference parameter by the target integral term coefficient, and then the virtual charging power of the power battery is determined by summing the original maximum charging power, the proportional term parameter, and the integral term parameter. This virtual charging power can represent the maximum actual charging power allowed for the power battery.

[0088] Based on this, when determining the increased value of the target output power of the generator, the increased value of the target output power can be determined based on the increased value of the required power of the drive motor, the maximum power consumption of the target load, and the virtual charging power of the power battery, so that the actual output power of the generator adjusted based on the increased value of the target output power is less than the sum of the increased actual required power of the drive motor, the maximum power consumption of the target load, and the virtual charging power of the power battery, and greater than the increased actual required power of the drive motor.

[0089] When charging the power battery based on the virtual charging power, it may cause the actual charging current of the power battery to be greater than the maximum charging current, damaging the power battery. Therefore, the charging power allocated to the power battery can also be adjusted according to the actual charging current of the power battery, that is, the actual output power of the generator is adjusted.

[0090] In one possible implementation, the maximum charging current of the power battery can be obtained. Among them, the maximum charging current of the power battery can be determined according to the maximum power of the power battery. For example, the maximum charging current can be expressed as k * maximum power / voltage + b, where k and b represent fitting coefficients, and the specific values of k and b are not limited. For example, k can be set to 1.1 and b can be set to 2.

[0091] When the actual charging current of the power battery is greater than the maximum charging current, the target current square difference between the actual charging current and the maximum charging current can be determined. That is, by squaring the difference between the maximum charging current and the actual charging current, the target current square difference is obtained. According to the correlation between the current square difference and the power attenuation coefficient, the target power attenuation coefficient associated with the target current square difference is determined. Among them, the correlation between the current square difference and the power attenuation coefficient can be pre-determined. Then, based on the product of the target power attenuation coefficient and the virtual charging power, the attenuated virtual charging power of the power battery is determined.

[0092] Based on this, when the required power of the drive motor increases, the target output power increase value of the generator can be readjusted based on the required power increase value of the drive motor, the maximum power consumption of the target load, and the attenuated virtual charging power. That is, the actual output power of the generator adjusted based on the target output power increase value is made less than the sum of the actual required power after the increase of the drive motor, the maximum power consumption of the target load, and the attenuated virtual charging power, and greater than the actual required power after the increase of the drive motor.

[0093] Through the method provided by the embodiments of the present application, the actual output power of the generator can be controlled to be greater than the actual required power according to the actual required power of the drive motor, and when the actual required power of the drive motor increases, the actual output power of the generator can be dynamically adjusted. When the drive motor and the power battery cannot completely consume the actual output power of the generator, it can be provided to the target load for consumption to prevent overcharging of the power battery. When the actual required power of the drive motor increases, on the basis that the actual output power of the generator is greater than the actual required power of the drive motor, the generator can respond faster to meet the request for increasing the required power of the drive motor.

[0094] Based on the above method embodiments, the embodiments of the present application further provide a control device for the vehicle to travel when the power battery is limited.

[0095] See Figure 3 , Figure 3 which is a schematic diagram of a control device for the vehicle to travel when the power battery is limited provided by the embodiments of the present application.

[0096] The device 300 includes:

[0097] An acquisition unit 301, configured to acquire the actual output power of the generator and the actual required power of the drive motor, where the actual output power is greater than the actual required power;

[0098] A determination unit 302, configured to determine the actual power consumption of the target load based on the actual output power and the actual required power;

[0099] The control unit 303 is configured to control the operation of the target load based on the actual power consumption.

[0100] In a possible implementation manner, the determining unit 302 is specifically configured to obtain the actual charging power when the power battery is limited; determine the actual power consumption based on the actual output power, the actual required power, and the actual charging power.

[0101] In a possible implementation manner, the obtaining unit 301 is further configured to obtain the growth value of the required power of the drive motor;

[0102] The determining unit 302 is further configured to determine the growth value of the output power of the generator, where the growth value of the output power is greater than the growth value of the required power; determine the target growth value of the output power of the generator based on the growth value of the output power and the maximum power consumption of the target load;

[0103] The control unit 303 is further configured to adjust the actual output power of the generator to increase the target growth value of the output power.

[0104] In a possible implementation manner, the determining unit 302 is specifically configured to determine the target power difference parameter based on the original maximum charging power and the actual charging power of the power battery; determine the target proportional term coefficient and the target integral term coefficient associated with the target power difference parameter based on the correlation relationship between the power difference parameter, the proportional term coefficient, and the integral term coefficient; determine the virtual charging power of the power battery based on the original maximum charging power, the power difference parameter, the target proportional term coefficient, and the target integral term coefficient; determine the target growth value of the output power based on the growth value of the output power, the maximum power consumption, and the virtual charging power.

[0105] In a possible implementation manner, the obtaining unit 301 is further configured to obtain the maximum charging current of the power battery;

[0106] The determining unit 302 is further configured to determine the target square difference of the actual charging current and the maximum charging current when the actual charging current of the power battery is greater than the maximum charging current; determine the target power attenuation coefficient associated with the target square difference of the current according to the correlation relationship between the square difference of the current and the power attenuation coefficient; determine the attenuated virtual charging power of the power battery based on the product of the target power attenuation coefficient and the virtual charging power.

[0107] The control unit 303 is further configured to adjust the target growth value of the output power based on the growth value of the output power, the maximum power consumption, and the attenuated virtual charging power.

[0108] In a possible implementation, the control unit 303 is specifically configured to determine a predicted output power growth value of the engine based on the target output power growth value and a preset efficiency, where the preset efficiency represents the ratio between the output power of the engine and the output power of the generator; adjust the rotational speed and / or output torque of the engine based on the predicted output power growth value; and control the engine to drive the generator to operate at the adjusted rotational speed and / or the adjusted output torque, so as to adjust the actual output power of the generator to increase the target output power growth value.

[0109] In a possible implementation, the obtaining unit 301 is specifically configured to determine a required torque growth value of the drive motor according to the throttle pedal parsing; and determine a required power growth value based on the required torque growth value and the rotational speed of the drive motor.

[0110] Based on the above method embodiments and device embodiments, an embodiment of the present application further provides a control device for the vehicle running when the power battery is limited. The following will be introduced with reference to the drawings.

[0111] See Figure 4 , Figure 4 which is a schematic diagram of a control device for the vehicle running when the power battery is limited provided by an embodiment of the present application.

[0112] The device 400 includes: a memory 401 and a processor 402;

[0113] The memory 401 is used to store relevant program codes;

[0114] The processor 402 is used to call the program codes to execute the control method for the vehicle running when the power battery is limited described in the above method embodiments.

[0115] In addition, an embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and the computer program is used to execute the control method for the vehicle running when the power battery is limited described in the above method embodiments.

[0116] It should be noted that the technical features in the upper-level means provided in the embodiments of the present application are clear to those skilled in the art, and the problems to be solved by the upper-level means are also clear. How to obtain the means for the corresponding features can be selected by those skilled in the art according to specific implementation requirements. The means provided by the present application should not be regarded as a limitation to the solution or the only implementation means.

[0117] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. In particular, for system or device embodiments, since they are basically similar to method embodiments, they are described relatively simply. For relevant parts, reference can be made to the corresponding descriptions in the method embodiments. The device embodiments described above are merely illustrative. The units or modules described as separate components may or may not be physically separated. The components shown as units or modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network units. Some or all of the units or modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative efforts.

[0118] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functions, and operations that the methods, devices, and equipment, etc. according to various embodiments of the present application may achieve. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and this module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order from that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0119] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that there can be three relationships. For example, "A and / or B" can represent: only A exists, only B exists, and both A and B exist at the same time. Here, A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (one) of the following" or its similar expression refers to any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0120] It should also be noted that in this application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0121] The steps of the methods or algorithms described in connection with the embodiments disclosed in this application can be implemented directly in hardware, in software modules executed by a processor, or in a combination of both. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well known in the art.

[0122] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a vehicle with a power battery during limited time travel, characterized in that: The method is applied to a working condition where the power battery of the whole vehicle is limited, and the method comprises: Acquire the actual output power of the generator and the actual required power of the drive motor, wherein the actual output power is greater than the actual required power; Determining actual power consumption of a target load based on the actual output power and the actual required power; The target load is controlled to operate based on the actual power consumption.

2. The method according to claim 1, characterized in that The determining the actual power consumption of the target load based on the actual output power and the actual required power includes: Get the actual charging power when the power battery is limited; The actual power consumption is determined based on the actual output power, the actual required power and the actual charging power.

3. The method according to claim 2, characterized in that The method further comprises: Obtaining a required power growth value of the drive motor; Determining a target output power increase value of the generator based on the required power increase value and the maximum power consumption of the target load; The actual output power of the generator is adjusted to increase the target output power growth value, and the actual output power of the drive motor after adjustment is greater than the actual required power of the drive motor after growth.

4. The method according to claim 3, characterized in that The step of determining the target output power growth value of the generator based on the required power growth value and the maximum power consumption of the target load comprises: Determining a target power difference parameter based on an original maximum charging power of the power battery and the actual charging power; Determining a target proportional term coefficient and a target integral term coefficient associated with the target power difference parameter based on an association relationship among the power difference parameter, the proportional term coefficient and the integral term coefficient; Determining a virtual charging power of the power battery based on the original maximum charging power, the power difference parameter, the target proportional term coefficient, and the target integral term coefficient; The target output power increase value is determined based on the required power increase value, the maximum power consumption and the virtual charging power.

5. The method according to claim 4, characterized in that The method further comprises: Obtaining the maximum charging current of the power battery; When the actual charging current of the power battery is greater than the maximum charging current, determining a target current square difference between the actual charging current and the maximum charging current; Determining a target power attenuation coefficient associated with the target current square difference according to a correlation relationship between the current square difference and the power attenuation coefficient; determining a decaying virtual charging power of the power battery based on a product of the target power decay coefficient and the virtual charging power; The target output power increase value is adjusted based on the required power increase value, the maximum power consumption and the decaying virtual charging power.

6. The method according to claim 3, characterized in that The adjusting the actual output power of the generator to increase the target output power growth value comprises: Determining a predicted output power increase value of the engine based on the target output power increase value and a preset efficiency, wherein the preset efficiency represents a ratio between the output power of the engine and the output power of the generator; adjusting the speed and / or output torque of the engine based on the predicted output power increase value; The engine is controlled to drive the generator to operate at an adjusted speed and / or an adjusted output torque, so as to adjust the actual output power of the generator to increase the target output power growth value.

7. The method according to claim 1, characterized in that The obtaining of the required power growth value of the driving motor includes: Determining a required torque increase value of the drive motor according to accelerator pedal analysis; The required power increase value is determined based on the required torque increase value and the rotational speed of the drive motor.

8. A control device for a vehicle with a power battery limited in time, characterized in that: The device is applied to the working condition where the power battery of the whole vehicle is limited, and the device comprises: An acquisition unit, used to acquire an actual output power of the generator and an actual required power of the drive motor, wherein the actual output power is greater than the actual required power; a determining unit, configured to determine an actual power consumption of a target load based on the actual output power and the actual required power; A control unit is used to control the operation of the target load based on the actual power consumption.

9. A control device for a power battery-limited vehicle driving, characterized in that: The device comprises: a memory and a processor; The memory is used to store relevant program codes; The processor is used to call the program code to execute the control method for vehicle driving when the power battery is restricted as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method for controlling the full-vehicle driving with a power battery during limited time as claimed in any one of claims 1 to 7.

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